src/imap.c

   1 /*
   2  * Claws Mail -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2020 the Claws Mail team and Hiroyuki Yamamoto
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #ifdef HAVE_CONFIG_H
  20 #  include "config.h"
  21 #include "claws-features.h"
  22 #endif
  23
  24 #include "defs.h"
  25
  26 #include <glib.h>
  27 #include <glib/gi18n.h>
  28 #include <stdio.h>
  29 #include <string.h>
  30 #include "imap.h"
  31 #include "imap_gtk.h"
  32 #include "inc.h"
  33 #include "xml.h"
  34 #include "alertpanel.h"
  35
  36 #ifdef HAVE_LIBETPAN
  37
  38 #include <stdlib.h>
  39 #include <dirent.h>
  40 #include <unistd.h>
  41 #include <ctype.h>
  42 #include <time.h>
  43 #include <errno.h>
  44 #if HAVE_ICONV
  45 #  include <iconv.h>
  46 #endif
  47
  48 #ifdef USE_GNUTLS
  49 #  include "ssl.h"
  50 #endif
  51
  52 #include "folder.h"
  53 #include "session.h"
  54 #include "procmsg.h"
  55 #include "socket.h"
  56 #include "recv.h"
  57 #include "procheader.h"
  58 #include "prefs_account.h"
  59 #include "codeconv.h"
  60 #include "md5.h"
  61 #include "utils.h"
  62 #include "prefs_common.h"
  63 #include "inputdialog.h"
  64 #include "log.h"
  65 #include "remotefolder.h"
  66 #include "claws.h"
  67 #include "statusbar.h"
  68 #include "msgcache.h"
  69 #include "imap-thread.h"
  70 #include "account.h"
  71 #include "tags.h"
  72 #include "main.h"
  73 #include "passwordstore.h"
  74 #include "file-utils.h"
  75
  76 typedef struct _IMAPFolder      IMAPFolder;
  77 typedef struct _IMAPSession     IMAPSession;
  78 typedef struct _IMAPNameSpace   IMAPNameSpace;
  79 typedef struct _IMAPFolderItem  IMAPFolderItem;
  80
  81 #define IMAP_FOLDER(obj)        ((IMAPFolder *)obj)
  82 #define IMAP_FOLDER_ITEM(obj)   ((IMAPFolderItem *)obj)
  83 #define IMAP_SESSION(obj)       ((IMAPSession *)obj)
  84
  85 struct _IMAPFolder
  86 {
  87         RemoteFolder rfolder;
  88
  89         /* list of IMAPNameSpace */
  90         GList *ns_personal;
  91         GList *ns_others;
  92         GList *ns_shared;
  93         gchar last_seen_separator;
  94         guint refcnt;
  95         guint max_set_size;
  96         gchar *search_charset;
  97         gboolean search_charset_supported;
  98 };
  99
 100 struct _IMAPSession
 101 {
 102         Session session;
 103
 104         gboolean authenticated;
 105
 106         GSList *capability;
 107         gboolean uidplus;
 108
 109         gchar *mbox;
 110         guint cmd_count;
 111
 112         /* CLAWS */
 113         gboolean folder_content_changed;
 114         guint exists;
 115         guint recent;
 116         guint expunge;
 117         guint unseen;
 118         guint uid_validity;
 119         guint uid_next;
 120
 121         Folder * folder;
 122         gboolean busy;
 123         gboolean cancelled;
 124         gboolean sens_update_block;
 125         gboolean do_destroy;
 126 };
 127
 128 struct _IMAPNameSpace
 129 {
 130         gchar *name;
 131         gchar separator;
 132 };
 133
 134 #define IMAPBUFSIZE     8192
 135
 136 #define IMAP_IS_SEEN(flags)     ((flags & IMAP_FLAG_SEEN) != 0)
 137 #define IMAP_IS_ANSWERED(flags) ((flags & IMAP_FLAG_ANSWERED) != 0)
 138 #define IMAP_IS_FLAGGED(flags)  ((flags & IMAP_FLAG_FLAGGED) != 0)
 139 #define IMAP_IS_DELETED(flags)  ((flags & IMAP_FLAG_DELETED) != 0)
 140 #define IMAP_IS_DRAFT(flags)    ((flags & IMAP_FLAG_DRAFT) != 0)
 141 #define IMAP_IS_FORWARDED(flags)        ((flags & IMAP_FLAG_FORWARDED) != 0)
 142 #define IMAP_IS_SPAM(flags)     ((flags & IMAP_FLAG_SPAM) != 0)
 143 #define IMAP_IS_HAM(flags)      ((flags & IMAP_FLAG_HAM) != 0)
 144
 145
 146 #define IMAP4_PORT      143
 147 #ifdef USE_GNUTLS
 148 #define IMAPS_PORT      993
 149 #endif
 150
 151 #define IMAP_CMD_LIMIT  1000
 152
 153 enum {
 154         ITEM_CAN_CREATE_FLAGS_UNKNOWN = 0,
 155         ITEM_CAN_CREATE_FLAGS,
 156         ITEM_CANNOT_CREATE_FLAGS
 157 };
 158
 159 struct _IMAPFolderItem
 160 {
 161         FolderItem item;
 162
 163         guint lastuid;
 164         guint uid_next;
 165         GSList *uid_list;
 166         gboolean batching;
 167
 168         GHashTable *flags_set_table;
 169         GHashTable *flags_unset_table;
 170         guint32 last_change;
 171         guint32 last_sync;
 172         gboolean should_update;
 173         gboolean should_trash_cache;
 174         gint can_create_flags;
 175
 176         GHashTable *tags_set_table;
 177         GHashTable *tags_unset_table;
 178         GSList *ok_flags;
 179
 180 };
 181
 182 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item);
 183 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag);
 184
 185 static void imap_folder_init            (Folder         *folder,
 186                                          const gchar    *name,
 187                                          const gchar    *path);
 188
 189 static Folder   *imap_folder_new        (const gchar    *name,
 190                                          const gchar    *path);
 191 static void      imap_folder_destroy    (Folder         *folder);
 192
 193 static IMAPSession *imap_session_new    (Folder         *folder,
 194                                          const PrefsAccount     *account);
 195 static gint     imap_session_authenticate(IMAPSession   *session,
 196                                           PrefsAccount  *account);
 197 static void     imap_session_destroy    (Session        *session);
 198
 199 static gchar   *imap_fetch_msg          (Folder         *folder,
 200                                          FolderItem     *item,
 201                                          gint            uid);
 202 static gchar   *imap_fetch_msg_full     (Folder         *folder,
 203                                          FolderItem     *item,
 204                                          gint            uid,
 205                                          gboolean        headers,
 206                                          gboolean        body);
 207 static void     imap_remove_cached_msg  (Folder         *folder,
 208                                          FolderItem     *item,
 209                                          MsgInfo        *msginfo);
 210 static gint     imap_add_msg            (Folder         *folder,
 211                                          FolderItem     *dest,
 212                                          const gchar    *file,
 213                                          MsgFlags       *flags);
 214 static gint     imap_add_msgs           (Folder         *folder,
 215                                          FolderItem     *dest,
 216                                          GSList         *file_list,
 217                                          GHashTable     *relation);
 218
 219 static gint     imap_copy_msg           (Folder         *folder,
 220                                          FolderItem     *dest,
 221                                          MsgInfo        *msginfo);
 222 static gint     imap_copy_msgs          (Folder         *folder,
 223                                          FolderItem     *dest,
 224                                          MsgInfoList    *msglist,
 225                                          GHashTable     *relation);
 226
 227 static gint     search_msgs             (Folder                 *folder,
 228                                          FolderItem             *container,
 229                                          MsgNumberList          **msgs,
 230                                          gboolean               *on_server,
 231                                          MatcherList            *predicate,
 232                                          SearchProgressNotify   progress_cb,
 233                                          gpointer               progress_data);
 234
 235 static gint     imap_remove_msg         (Folder         *folder,
 236                                          FolderItem     *item,
 237                                          gint            uid);
 238 static gint     imap_remove_msgs        (Folder         *folder,
 239                                          FolderItem     *dest,
 240                                          MsgInfoList    *msglist,
 241                                          GHashTable     *relation);
 242 static gint     imap_expunge            (Folder         *folder,
 243                                          FolderItem     *dest);
 244 static gint     imap_remove_all_msg     (Folder         *folder,
 245                                          FolderItem     *item);
 246
 247 static gboolean imap_is_msg_changed     (Folder         *folder,
 248                                          FolderItem     *item,
 249                                          MsgInfo        *msginfo);
 250
 251 static gint     imap_close              (Folder         *folder,
 252                                          FolderItem     *item);
 253
 254 static gint     imap_scan_tree          (Folder         *folder);
 255
 256 static gint     imap_create_tree        (Folder         *folder);
 257
 258 static FolderItem *imap_create_folder   (Folder         *folder,
 259                                          FolderItem     *parent,
 260                                          const gchar    *name);
 261 static gint     imap_rename_folder      (Folder         *folder,
 262                                          FolderItem     *item,
 263                                          const gchar    *name);
 264 static gint     imap_remove_folder      (Folder         *folder,
 265                                          FolderItem     *item);
 266
 267 static FolderItem *imap_folder_item_new (Folder         *folder);
 268 static void imap_folder_item_destroy    (Folder         *folder,
 269                                          FolderItem     *item);
 270
 271 static IMAPSession *imap_session_get    (Folder         *folder);
 272
 273 static gint imap_auth                   (IMAPSession    *session,
 274                                          const gchar    *user,
 275                                          const gchar    *pass,
 276                                          IMAPAuthType    type);
 277
 278 static gint imap_scan_tree_recursive    (IMAPSession    *session,
 279                                          FolderItem     *item,
 280                                          gboolean        subs_only);
 281
 282 static void imap_create_missing_folders (Folder         *folder);
 283 static FolderItem *imap_create_special_folder
 284                                         (Folder                 *folder,
 285                                          SpecialFolderItemType   stype,
 286                                          const gchar            *name);
 287
 288 static gint imap_do_copy_msgs           (Folder         *folder,
 289                                          FolderItem     *dest,
 290                                          MsgInfoList    *msglist,
 291                                          GHashTable     *relation,
 292                                          gboolean        same_dest_ok);
 293
 294 static gint imap_do_remove_msgs         (Folder         *folder,
 295                                          FolderItem     *dest,
 296                                          MsgInfoList    *msglist,
 297                                          GHashTable     *relation);
 298
 299 static void imap_delete_all_cached_messages     (FolderItem     *item);
 300 static void imap_set_batch              (Folder         *folder,
 301                                          FolderItem     *item,
 302                                          gboolean        batch);
 303 static gint imap_set_message_flags      (IMAPSession    *session,
 304                                          IMAPFolderItem *item,
 305                                          MsgNumberList  *numlist,
 306                                          IMAPFlags       flags,
 307                                          GSList         *tags,
 308                                          gboolean        is_set);
 309 static gint imap_select                 (IMAPSession    *session,
 310                                          IMAPFolder     *folder,
 311                                          FolderItem     *item,
 312                                          gint           *exists,
 313                                          gint           *recent,
 314                                          gint           *unseen,
 315                                          guint32        *uid_validity,
 316                                          gint           *can_create_flags,
 317                                          gboolean        block);
 318 static gint imap_status                 (IMAPSession    *session,
 319                                          IMAPFolder     *folder,
 320                                          const gchar    *path,
 321                                          IMAPFolderItem *item,
 322                                          gint           *messages,
 323                                          guint32        *uid_next,
 324                                          guint32        *uid_validity,
 325                                          gint           *unseen,
 326                                          gboolean        block);
 327 static void     imap_commit_tags        (FolderItem     *item,
 328                                          MsgInfo        *msginfo,
 329                                          GSList         *set_tags,
 330                                          GSList         *unset_tags);
 331
 332 static gchar imap_get_path_separator            (IMAPSession    *session,
 333                                                  IMAPFolder     *folder,
 334                                                  const gchar    *path,
 335                                                  gint           *ok);
 336 static gchar *imap_get_real_path                (IMAPSession    *session,
 337                                                  IMAPFolder     *folder,
 338                                                  const gchar    *path,
 339                                                  gint           *ok);
 340 #ifdef HAVE_LIBETPAN
 341 static void imap_synchronise            (FolderItem     *item, gint days);
 342 #endif
 343 static gboolean imap_is_busy            (Folder *folder);
 344
 345 static void imap_free_capabilities      (IMAPSession    *session);
 346
 347 /* low-level IMAP4rev1 commands */
 348 static gint imap_cmd_login      (IMAPSession    *session,
 349                                  const gchar    *user,
 350                                  const gchar    *pass,
 351                                  const gchar    *type);
 352 static gint imap_cmd_noop       (IMAPSession    *session);
 353 #ifdef USE_GNUTLS
 354 static gint imap_cmd_starttls   (IMAPSession    *session);
 355 #endif
 356 static gint imap_cmd_select     (IMAPSession    *session,
 357                                  const gchar    *folder,
 358                                  gint           *exists,
 359                                  gint           *recent,
 360                                  gint           *unseen,
 361                                  guint32        *uid_validity,
 362                                  gint           *can_create_flags,
 363                                  GSList         **ok_flags,
 364                                  gboolean        block);
 365 static gint imap_cmd_close      (IMAPSession    *session);
 366 static gint imap_cmd_examine    (IMAPSession    *session,
 367                                  const gchar    *folder,
 368                                  gint           *exists,
 369                                  gint           *recent,
 370                                  gint           *unseen,
 371                                  guint32        *uid_validity,
 372                                  gboolean        block);
 373 static gint imap_cmd_create     (IMAPSession    *sock,
 374                                  const gchar    *folder);
 375 static gint imap_cmd_rename     (IMAPSession    *sock,
 376                                  const gchar    *oldfolder,
 377                                  const gchar    *newfolder);
 378 static gint imap_cmd_delete     (IMAPSession    *session,
 379                                  const gchar    *folder);
 380 static gint imap_cmd_fetch      (IMAPSession    *sock,
 381                                  guint32         uid,
 382                                  const gchar    *filename,
 383                                  gboolean        headers,
 384                                  gboolean        body);
 385 static gint imap_cmd_append     (IMAPSession    *session,
 386                                  IMAPFolderItem *item,
 387                                  const gchar    *destfolder,
 388                                  const gchar    *file,
 389                                  IMAPFlags       flags,
 390                                  guint32        *new_uid);
 391 static gint imap_cmd_copy       (IMAPSession *session,
 392                                  struct mailimap_set * set,
 393                                  const gchar *destfolder,
 394                                  struct mailimap_set ** source,
 395                                  struct mailimap_set ** dest);
 396 static gint imap_cmd_store      (IMAPSession    *session,
 397                                  IMAPFolderItem *item,
 398                                  struct mailimap_set * set,
 399                                  IMAPFlags flags,
 400                                  GSList *tags,
 401                                  int do_add);
 402 static gint imap_cmd_expunge    (IMAPSession    *session);
 403
 404 static void imap_path_separator_subst           (gchar          *str,
 405                                                  gchar           separator);
 406
 407 static gboolean imap_rename_folder_func         (GNode          *node,
 408                                                  gpointer        data);
 409 static gint imap_get_num_list                   (Folder         *folder,
 410                                                  FolderItem     *item,
 411                                                  GSList        **list,
 412                                                  gboolean       *old_uids_valid);
 413 static GSList *imap_get_msginfos                (Folder         *folder,
 414                                                  FolderItem     *item,
 415                                                  GSList         *msgnum_list);
 416 static MsgInfo *imap_get_msginfo                (Folder         *folder,
 417                                                  FolderItem     *item,
 418                                                  gint            num);
 419 static gboolean imap_scan_required              (Folder         *folder,
 420                                                  FolderItem     *item);
 421 static void imap_change_flags                   (Folder         *folder,
 422                                                  FolderItem     *item,
 423                                                  MsgInfo        *msginfo,
 424                                                  MsgPermFlags    newflags);
 425 static gint imap_get_flags                      (Folder         *folder,
 426                                                  FolderItem     *item,
 427                                                  MsgInfoList    *msglist,
 428                                                  GHashTable     *msgflags);
 429 static gchar *imap_item_get_path                (Folder         *folder,
 430                                                  FolderItem     *item);
 431 static MsgInfo *imap_parse_msg(const gchar *file, FolderItem *item);
 432
 433
 434 /* data types conversion libetpan <-> claws */
 435 static GSList * imap_list_from_lep(IMAPFolder * folder,
 436                                    clist * list, const gchar * real_path, gboolean all);
 437 static GSList * imap_get_lep_set_from_numlist(IMAPFolder *folder, MsgNumberList *numlist);
 438 static GSList * imap_get_lep_set_from_msglist(IMAPFolder *folder, MsgInfoList *msglist);
 439 static GSList * imap_uid_list_from_lep(clist * list, gint* length);
 440 static GSList * imap_uid_list_from_lep_tab(carray * list);
 441 static void imap_flags_hash_from_lep_uid_flags_tab(carray * list,
 442                                                    GHashTable * hash,
 443                                                    GHashTable *tags_hash);
 444 static MsgInfo *imap_envelope_from_lep(struct imap_fetch_env_info * info,
 445                                        FolderItem *item);
 446 static void imap_lep_set_free(GSList *seq_list);
 447 static struct mailimap_flag_list * imap_flag_to_lep(IMAPFolderItem *item, IMAPFlags flags, GSList *tags);
 448
 449 typedef struct _hashtable_data {
 450         GSList *msglist;
 451         IMAPFolderItem *item;
 452 } hashtable_data;
 453
 454 static FolderClass imap_class;
 455
 456 FolderClass *imap_get_class(void)
 457 {
 458         if (imap_class.idstr == NULL) {
 459                 imap_class.type = F_IMAP;
 460                 imap_class.idstr = "imap";
 461                 imap_class.uistr = "IMAP";
 462                 imap_class.supports_server_search = TRUE;
 463
 464                 /* Folder functions */
 465                 imap_class.new_folder = imap_folder_new;
 466                 imap_class.destroy_folder = imap_folder_destroy;
 467                 imap_class.scan_tree = imap_scan_tree;
 468                 imap_class.create_tree = imap_create_tree;
 469
 470                 /* FolderItem functions */
 471                 imap_class.item_new = imap_folder_item_new;
 472                 imap_class.item_destroy = imap_folder_item_destroy;
 473                 imap_class.item_get_path = imap_item_get_path;
 474                 imap_class.create_folder = imap_create_folder;
 475                 imap_class.rename_folder = imap_rename_folder;
 476                 imap_class.remove_folder = imap_remove_folder;
 477                 imap_class.close = imap_close;
 478                 imap_class.get_num_list = imap_get_num_list;
 479                 imap_class.scan_required = imap_scan_required;
 480                 imap_class.set_xml = folder_set_xml;
 481                 imap_class.get_xml = folder_get_xml;
 482                 imap_class.item_set_xml = imap_item_set_xml;
 483                 imap_class.item_get_xml = imap_item_get_xml;
 484
 485                 /* Message functions */
 486                 imap_class.get_msginfo = imap_get_msginfo;
 487                 imap_class.get_msginfos = imap_get_msginfos;
 488                 imap_class.fetch_msg = imap_fetch_msg;
 489                 imap_class.fetch_msg_full = imap_fetch_msg_full;
 490                 imap_class.add_msg = imap_add_msg;
 491                 imap_class.add_msgs = imap_add_msgs;
 492                 imap_class.copy_msg = imap_copy_msg;
 493                 imap_class.copy_msgs = imap_copy_msgs;
 494                 imap_class.search_msgs = search_msgs;
 495                 imap_class.remove_msg = imap_remove_msg;
 496                 imap_class.remove_msgs = imap_remove_msgs;
 497                 imap_class.expunge = imap_expunge;
 498                 imap_class.remove_all_msg = imap_remove_all_msg;
 499                 imap_class.is_msg_changed = imap_is_msg_changed;
 500                 imap_class.change_flags = imap_change_flags;
 501                 imap_class.get_flags = imap_get_flags;
 502                 imap_class.set_batch = imap_set_batch;
 503                 imap_class.synchronise = imap_synchronise;
 504                 imap_class.remove_cached_msg = imap_remove_cached_msg;
 505                 imap_class.commit_tags = imap_commit_tags;
 506         }
 507
 508         return &imap_class;
 509 }
 510
 511 static void imap_refresh_sensitivity (IMAPSession *session)
 512 {
 513         MainWindow *mainwin;
 514
 515         if (session->sens_update_block)
 516                 return;
 517         mainwin = mainwindow_get_mainwindow();
 518         if (mainwin) {
 519                 toolbar_main_set_sensitive(mainwin);
 520                 main_window_set_menu_sensitive(mainwin);
 521         }
 522 }
 523
 524 static void lock_session(IMAPSession *session)
 525 {
 526         if (session) {
 527                 debug_print("locking session %p (%d)\n", session, session->busy);
 528                 if (session->busy)
 529                         debug_print("         SESSION WAS LOCKED !!      \n");
 530                 session->busy = TRUE;
 531                 imap_refresh_sensitivity(session);
 532         } else {
 533                 debug_print("can't lock null session\n");
 534         }
 535 }
 536
 537 static void unlock_session(IMAPSession *session)
 538 {
 539         if (session) {
 540                 debug_print("unlocking session %p\n", session);
 541                 session->busy = FALSE;
 542                 imap_refresh_sensitivity(session);
 543         } else {
 544                 debug_print("can't unlock null session\n");
 545         }
 546 }
 547
 548 static gboolean imap_ping(gpointer data)
 549 {
 550         Session *session = (Session *)data;
 551         IMAPSession *imap_session = IMAP_SESSION(session);
 552         int r;
 553
 554         if (session->state != SESSION_READY)
 555                 return FALSE;
 556         if (imap_session->busy || !imap_session->authenticated)
 557                 return TRUE;
 558
 559         lock_session(imap_session);
 560         r = imap_cmd_noop(imap_session);
 561         unlock_session(imap_session);
 562
 563         return r == MAILIMAP_NO_ERROR;
 564 }
 565
 566 static void imap_disc_session_destroy(IMAPSession *session)
 567 {
 568         RemoteFolder *rfolder = NULL;
 569
 570         if (session == NULL)
 571                 return;
 572
 573         rfolder = REMOTE_FOLDER(IMAP_SESSION(session)->folder);
 574
 575         if (rfolder == NULL)
 576                 return;
 577         log_warning(LOG_PROTOCOL, _("IMAP connection broken\n"));
 578         SESSION(session)->state = SESSION_DISCONNECTED;
 579         SESSION(session)->sock = NULL;
 580 }
 581
 582 static void imap_safe_destroy(IMAPSession *session)
 583 {
 584         if (!session->busy)
 585                 session_destroy(SESSION(session));
 586         else
 587                 session->do_destroy = TRUE;
 588 }
 589
 590 static gboolean is_fatal(int libetpan_errcode)
 591 {
 592         switch(libetpan_errcode) {
 593         case MAILIMAP_ERROR_STREAM:
 594         case MAILIMAP_ERROR_PROTOCOL:
 595         case MAILIMAP_ERROR_PARSE:
 596         case MAILIMAP_ERROR_BAD_STATE:
 597                 return TRUE;
 598         default:
 599                 return FALSE;
 600         }
 601 }
 602
 603 #define MY_LOG_WARNING(concat_cmd, ...) \
 604         msg = concat_cmd; \
 605         log_warning(LOG_PROTOCOL, msg, __VA_ARGS__); \
 606         g_free(msg);
 607
 608 static void imap_handle_error(Session *session, const gchar *server, int libetpan_errcode)
 609 {
 610         const gchar *session_server = (session ? session->server : NULL);
 611         gchar *msg;
 612
 613         if (session_server == NULL)
 614                 session_server = server;
 615         if (session_server == NULL)
 616                 session_server = "(null)";
 617
 618         switch(libetpan_errcode) {
 619         case MAILIMAP_NO_ERROR:
 620                 return;
 621         case MAILIMAP_NO_ERROR_AUTHENTICATED:
 622                 MY_LOG_WARNING(g_strconcat(_("IMAP error on %s:"), " ", _("authenticated"), "\n", NULL), session_server)
 623                 break;
 624         case MAILIMAP_NO_ERROR_NON_AUTHENTICATED:
 625                 MY_LOG_WARNING(g_strconcat(_("IMAP error on %s:"), " ", _("not authenticated"), "\n", NULL), session_server)
 626                 break;
 627         case MAILIMAP_ERROR_BAD_STATE:
 628                 MY_LOG_WARNING(g_strconcat(_("IMAP error on %s:"), " ", _("bad state"), "\n", NULL), session_server)
 629                 break;
 630         case MAILIMAP_ERROR_STREAM:
 631                 MY_LOG_WARNING(g_strconcat(_("IMAP error on %s:"), " ", _("stream error"), "\n", NULL), session_server)
 632                 break;
 633         case MAILIMAP_ERROR_PARSE:
 634                 MY_LOG_WARNING(g_strconcat(_("IMAP error on %s:"), " ", _("parse error "
 635                                             "(very probably non-RFC compliance from the server)"), "\n", NULL), session_server)
 636                 break;
 637         case MAILIMAP_ERROR_CONNECTION_REFUSED:
 638                 MY_LOG_WARNING(g_strconcat(_("IMAP error on %s:"), " ", _("connection refused"), "\n", NULL), session_server)
 639                 break;
 640         case MAILIMAP_ERROR_MEMORY:
 641                 MY_LOG_WARNING(g_strconcat(_("IMAP error on %s:"), " ", _("memory error"), "\n", NULL), session_server)
 642                 break;
 643         case MAILIMAP_ERROR_FATAL:
 644                 MY_LOG_WARNING(g_strconcat(_("IMAP error on %s:"), " ", _("fatal error"), "\n", NULL), session_server)
 645                 break;
 646         case MAILIMAP_ERROR_PROTOCOL:
 647                 MY_LOG_WARNING(g_strconcat(_("IMAP error on %s:"), " ", _("protocol error "
 648                                             "(very probably non-RFC compliance from the server)"), "\n", NULL), session_server)
 649                 break;
 650         case MAILIMAP_ERROR_DONT_ACCEPT_CONNECTION:
 651                 MY_LOG_WARNING(g_strconcat(_("IMAP error on %s:"), " ", _("connection not accepted"), "\n", NULL), session_server)
 652                 break;
 653         case MAILIMAP_ERROR_APPEND:
 654                 MY_LOG_WARNING(g_strconcat(_("IMAP error on %s:"), " ", _("APPEND error"), "\n", NULL), session_server)
 655                 break;
 656         case MAILIMAP_ERROR_NOOP:
 657                 MY_LOG_WARNING(g_strconcat(_("IMAP error on %s:"), " ", _("NOOP error"), "\n", NULL), session_server)
 658                 break;
 659         case MAILIMAP_ERROR_LOGOUT:
 660                 MY_LOG_WARNING(g_strconcat(_("IMAP error on %s:"), " ", _("LOGOUT error"), "\n", NULL), session_server)
 661                 break;
 662         case MAILIMAP_ERROR_CAPABILITY:
 663                 MY_LOG_WARNING(g_strconcat(_("IMAP error on %s:"), " ", _("CAPABILITY error"), "\n", NULL), session_server)
 664                 break;
 665         case MAILIMAP_ERROR_CHECK:
 666                 MY_LOG_WARNING(g_strconcat(_("IMAP error on %s:"), " ", _("CHECK error"), "\n", NULL), session_server)
 667                 break;
 668         case MAILIMAP_ERROR_CLOSE:
 669                 MY_LOG_WARNING(g_strconcat(_("IMAP error on %s:"), " ", _("CLOSE error"), "\n", NULL), session_server)
 670                 break;
 671         case MAILIMAP_ERROR_EXPUNGE:
 672                 MY_LOG_WARNING(g_strconcat(_("IMAP error on %s:"), " ", _("EXPUNGE error"), "\n", NULL), session_server)
 673                 break;
 674         case MAILIMAP_ERROR_COPY:
 675                 MY_LOG_WARNING(g_strconcat(_("IMAP error on %s:"), " ", _("COPY error"), "\n", NULL), session_server)
 676                 break;
 677         case MAILIMAP_ERROR_UID_COPY:
 678                 MY_LOG_WARNING(g_strconcat(_("IMAP error on %s:"), " ", _("UID COPY error"), "\n", NULL), session_server)
 679                 break;
 680         case MAILIMAP_ERROR_CREATE:
 681                 MY_LOG_WARNING(g_strconcat(_("IMAP error on %s:"), " ", _("CREATE error"), "\n", NULL), session_server)
 682                 break;
 683         case MAILIMAP_ERROR_DELETE:
 684                 MY_LOG_WARNING(g_strconcat(_("IMAP error on %s:"), " ", _("DELETE error"), "\n", NULL), session_server)
 685                 break;
 686         case MAILIMAP_ERROR_EXAMINE:
 687                 MY_LOG_WARNING(g_strconcat(_("IMAP error on %s:"), " ", _("EXAMINE error"), "\n", NULL), session_server)
 688                 break;
 689         case MAILIMAP_ERROR_FETCH:
 690                 MY_LOG_WARNING(g_strconcat(_("IMAP error on %s:"), " ", _("FETCH error"), "\n", NULL), session_server)
 691                 break;
 692         case MAILIMAP_ERROR_UID_FETCH:
 693                 MY_LOG_WARNING(g_strconcat(_("IMAP error on %s:"), " ", _("UID FETCH error"), "\n", NULL), session_server)
 694                 break;
 695         case MAILIMAP_ERROR_LIST:
 696                 MY_LOG_WARNING(g_strconcat(_("IMAP error on %s:"), " ", _("LIST error"), "\n", NULL), session_server)
 697                 break;
 698         case MAILIMAP_ERROR_LOGIN:
 699                 MY_LOG_WARNING(g_strconcat(_("IMAP error on %s:"), " ", _("LOGIN error"), "\n", NULL), session_server)
 700                 break;
 701         case MAILIMAP_ERROR_LSUB:
 702                 MY_LOG_WARNING(g_strconcat(_("IMAP error on %s:"), " ", _("LSUB error"), "\n", NULL), session_server)
 703                 break;
 704         case MAILIMAP_ERROR_RENAME:
 705                 MY_LOG_WARNING(g_strconcat(_("IMAP error on %s:"), " ", _("RENAME error"), "\n", NULL), session_server)
 706                 break;
 707         case MAILIMAP_ERROR_SEARCH:
 708                 MY_LOG_WARNING(g_strconcat(_("IMAP error on %s:"), " ", _("SEARCH error"), "\n", NULL), session_server)
 709                 break;
 710         case MAILIMAP_ERROR_UID_SEARCH:
 711                 MY_LOG_WARNING(g_strconcat(_("IMAP error on %s:"), " ", _("UID SEARCH error"), "\n", NULL), session_server)
 712                 break;
 713         case MAILIMAP_ERROR_SELECT:
 714                 MY_LOG_WARNING(g_strconcat(_("IMAP error on %s:"), " ", _("SELECT error"), "\n", NULL), session_server)
 715                 break;
 716         case MAILIMAP_ERROR_STATUS:
 717                 MY_LOG_WARNING(g_strconcat(_("IMAP error on %s:"), " ", _("STATUS error"), "\n", NULL), session_server)
 718                 break;
 719         case MAILIMAP_ERROR_STORE:
 720                 MY_LOG_WARNING(g_strconcat(_("IMAP error on %s:"), " ", _("STORE error"), "\n", NULL), session_server)
 721                 break;
 722         case MAILIMAP_ERROR_UID_STORE:
 723                 MY_LOG_WARNING(g_strconcat(_("IMAP error on %s:"), " ", _("UID STORE error"), "\n", NULL), session_server)
 724                 break;
 725         case MAILIMAP_ERROR_SUBSCRIBE:
 726                 MY_LOG_WARNING(g_strconcat(_("IMAP error on %s:"), " ", _("SUBSCRIBE error"), "\n", NULL), session_server)
 727                 break;
 728         case MAILIMAP_ERROR_UNSUBSCRIBE:
 729                 MY_LOG_WARNING(g_strconcat(_("IMAP error on %s:"), " ", _("UNSUBSCRIBE error"), "\n", NULL), session_server)
 730                 break;
 731         case MAILIMAP_ERROR_STARTTLS:
 732                 MY_LOG_WARNING(g_strconcat(_("IMAP error on %s:"), " ", _("STARTTLS error"), "\n", NULL), session_server)
 733                 break;
 734         case MAILIMAP_ERROR_INVAL:
 735                 MY_LOG_WARNING(g_strconcat(_("IMAP error on %s:"), " ", _("INVAL error"), "\n", NULL), session_server)
 736                 break;
 737         case MAILIMAP_ERROR_EXTENSION:
 738                 MY_LOG_WARNING(g_strconcat(_("IMAP error on %s:"), " ", _("EXTENSION error"), "\n", NULL), session_server)
 739                 break;
 740         case MAILIMAP_ERROR_SASL:
 741                 MY_LOG_WARNING(g_strconcat(_("IMAP error on %s:"), " ", _("SASL error"), "\n", NULL), session_server)
 742                 break;
 743 #ifdef USE_GNUTLS
 744         case MAILIMAP_ERROR_SSL:
 745                 MY_LOG_WARNING(g_strconcat(_("IMAP error on %s:"), " ", _("SSL/TLS error"), "\n", NULL), session_server)
 746                 break;
 747 #endif
 748         default:
 749                 MY_LOG_WARNING(g_strconcat(_("IMAP error on %s:"), " ", _("Unknown error [%d]"), "\n", NULL),
 750                         session_server, libetpan_errcode)
 751                 break;
 752         }
 753
 754         if (session && is_fatal(libetpan_errcode)) {
 755                 imap_disc_session_destroy(IMAP_SESSION(session));
 756         } else if (session && !is_fatal(libetpan_errcode)) {
 757                 if (IMAP_SESSION(session)->busy)
 758                         unlock_session(IMAP_SESSION(session));
 759         }
 760 }
 761
 762 #undef MY_LOG_WARNING
 763
 764 static Folder *imap_folder_new(const gchar *name, const gchar *path)
 765 {
 766         Folder *folder;
 767
 768         folder = (Folder *)g_new0(IMAPFolder, 1);
 769         folder->klass = &imap_class;
 770         imap_folder_init(folder, name, path);
 771
 772         return folder;
 773 }
 774
 775 static void imap_folder_destroy(Folder *folder)
 776 {
 777         while (imap_folder_get_refcnt(folder) > 0)
 778                 gtk_main_iteration();
 779
 780         g_free(IMAP_FOLDER(folder)->search_charset);
 781
 782         folder_remote_folder_destroy(REMOTE_FOLDER(folder));
 783         imap_done(folder);
 784 }
 785
 786 static void imap_folder_init(Folder *folder, const gchar *name,
 787                              const gchar *path)
 788 {
 789         folder_remote_folder_init((Folder *)folder, name, path);
 790         IMAP_FOLDER(folder)->max_set_size = IMAP_SET_MAX_COUNT;
 791         IMAP_FOLDER(folder)->search_charset_supported = TRUE;
 792         IMAP_FOLDER(folder)->search_charset = g_strdup(conv_get_locale_charset_str_no_utf8());
 793 }
 794
 795 static FolderItem *imap_folder_item_new(Folder *folder)
 796 {
 797         IMAPFolderItem *item;
 798
 799         item = g_new0(IMAPFolderItem, 1);
 800         item->lastuid = 0;
 801         item->uid_next = 0;
 802         item->uid_list = NULL;
 803
 804         return (FolderItem *)item;
 805 }
 806
 807 static void imap_folder_item_destroy(Folder *folder, FolderItem *_item)
 808 {
 809         IMAPFolderItem *item = (IMAPFolderItem *)_item;
 810
 811         g_return_if_fail(item != NULL);
 812         g_slist_free(item->uid_list);
 813
 814         g_free(_item);
 815 }
 816
 817 static gboolean imap_reset_uid_lists_func(GNode *node, gpointer data)
 818 {
 819         IMAPFolderItem *item = (IMAPFolderItem *)node->data;
 820
 821         item->lastuid = 0;
 822         g_slist_free(item->uid_list);
 823         item->uid_list = NULL;
 824
 825         return FALSE;
 826 }
 827
 828 static void imap_reset_uid_lists(Folder *folder)
 829 {
 830         if(folder->node == NULL)
 831                 return;
 832
 833         /* Destroy all uid lists and rest last uid */
 834         g_node_traverse(folder->node, G_IN_ORDER, G_TRAVERSE_ALL, -1, imap_reset_uid_lists_func, NULL);
 835 }
 836
 837 static int imap_get_capabilities(IMAPSession *session)
 838 {
 839         struct mailimap_capability_data *capabilities = NULL;
 840         clistiter *cur;
 841         int result;
 842
 843         if (session->capability != NULL)
 844                 return MAILIMAP_NO_ERROR;
 845
 846         result = imap_threaded_capability(session->folder, &capabilities);
 847
 848         if (result != MAILIMAP_NO_ERROR) {
 849                 return result;
 850         }
 851
 852         if (capabilities == NULL || capabilities->cap_list == NULL) {
 853                 return MAILIMAP_NO_ERROR;
 854         }
 855
 856         for(cur = clist_begin(capabilities->cap_list) ; cur != NULL ;
 857             cur = clist_next(cur)) {
 858                 struct mailimap_capability * cap =
 859                         clist_content(cur);
 860                 if (!cap || cap->cap_data.cap_name == NULL)
 861                         continue;
 862                 session->capability = g_slist_append
 863                                 (session->capability,
 864                                  g_strdup(cap->cap_data.cap_name));
 865                 debug_print("got capa %s\n", cap->cap_data.cap_name);
 866         }
 867         mailimap_capability_data_free(capabilities);
 868         return MAILIMAP_NO_ERROR;
 869 }
 870
 871 static gboolean imap_has_capability(IMAPSession *session, const gchar *cap)
 872 {
 873         GSList *cur;
 874         for (cur = session->capability; cur; cur = cur->next) {
 875                 if (!g_ascii_strcasecmp(cur->data, cap))
 876                         return TRUE;
 877         }
 878         return FALSE;
 879 }
 880
 881 static gint imap_auth(IMAPSession *session, const gchar *user, const gchar *pass,
 882                       IMAPAuthType type)
 883 {
 884         gint ok = MAILIMAP_ERROR_LOGIN;
 885         static time_t last_login_err = 0;
 886         gchar *ext_info = "";
 887         int r;
 888         gchar *server = NULL;
 889         if ((r = imap_get_capabilities(session)) != MAILIMAP_NO_ERROR) {
 890                 imap_handle_error(SESSION(session), NULL, r);
 891                 return r;
 892         }
 893         server = g_strdup(SESSION(session)->server);
 894         switch(type) {
 895         case IMAP_AUTH_ANON:
 896                 ok = imap_cmd_login(session, user, pass, "ANONYMOUS");
 897                 break;
 898         case IMAP_AUTH_CRAM_MD5:
 899                 ok = imap_cmd_login(session, user, pass, "CRAM-MD5");
 900                 break;
 901         case IMAP_AUTH_DIGEST_MD5:
 902                 ok = imap_cmd_login(session, user, pass, "DIGEST-MD5");
 903                 break;
 904         case IMAP_AUTH_SCRAM_SHA1:
 905                 ok = imap_cmd_login(session, user, pass, "SCRAM-SHA-1");
 906                 break;
 907         case IMAP_AUTH_PLAIN:
 908                 ok = imap_cmd_login(session, user, pass, "PLAIN");
 909                 break;
 910         case IMAP_AUTH_LOGIN:
 911                 ok = imap_cmd_login(session, user, pass, "LOGIN");
 912                 break;
 913         case IMAP_AUTH_PLAINTEXT:
 914                 ok = imap_cmd_login(session, user, pass, "plaintext");
 915                 break;
 916         case IMAP_AUTH_GSSAPI:
 917                 ok = imap_cmd_login(session, user, pass, "GSSAPI");
 918                 break;
 919         default:
 920                 debug_print("capabilities:\n"
 921                                 "\t ANONYMOUS %d\n"
 922                                 "\t CRAM-MD5 %d\n"
 923                                 "\t DIGEST-MD5 %d\n"
 924                                 "\t SCRAM-SHA-1 %d\n"
 925                                 "\t PLAIN %d\n"
 926                                 "\t LOGIN %d\n"
 927                                 "\t GSSAPI %d\n",
 928                         imap_has_capability(session, "ANONYMOUS"),
 929                         imap_has_capability(session, "CRAM-MD5"),
 930                         imap_has_capability(session, "DIGEST-MD5"),
 931                         imap_has_capability(session, "SCRAM-SHA-1"),
 932                         imap_has_capability(session, "PLAIN"),
 933                         imap_has_capability(session, "LOGIN"),
 934                         imap_has_capability(session, "GSSAPI"));
 935                 if (imap_has_capability(session, "CRAM-MD5"))
 936                         ok = imap_cmd_login(session, user, pass, "CRAM-MD5");
 937                 if (ok == MAILIMAP_ERROR_LOGIN && imap_has_capability(session, "DIGEST-MD5"))
 938                         ok = imap_cmd_login(session, user, pass, "DIGEST-MD5");
 939                 if (ok == MAILIMAP_ERROR_LOGIN && imap_has_capability(session, "SCRAM-SHA-1"))
 940                         ok = imap_cmd_login(session, user, pass, "SCRAM-SHA-1");
 941                 if (ok == MAILIMAP_ERROR_LOGIN && imap_has_capability(session, "PLAIN"))
 942                         ok = imap_cmd_login(session, user, pass, "PLAIN");
 943                 if (ok == MAILIMAP_ERROR_LOGIN && imap_has_capability(session, "LOGIN"))
 944                         ok = imap_cmd_login(session, user, pass, "LOGIN");
 945                 if (ok == MAILIMAP_ERROR_LOGIN && imap_has_capability(session, "GSSAPI"))
 946                         ok = imap_cmd_login(session, user, pass, "GSSAPI");
 947                 if (ok == MAILIMAP_ERROR_LOGIN) /* we always try plaintext login before giving up */
 948                         ok = imap_cmd_login(session, user, pass, "plaintext");
 949         }
 950
 951         if (ok == MAILIMAP_NO_ERROR)
 952                 session->authenticated = TRUE;
 953         else {
 954                 if (type == IMAP_AUTH_CRAM_MD5) {
 955                         ext_info = _("\n\nCRAM-MD5 logins only work if libetpan has been "
 956                                      "compiled with SASL support and the "
 957                                      "CRAM-MD5 SASL plugin is installed.");
 958                 }
 959
 960                 if (type == IMAP_AUTH_DIGEST_MD5) {
 961                         ext_info = _("\n\nDIGEST-MD5 logins only work if libetpan has been "
 962                                      "compiled with SASL support and the "
 963                                      "DIGEST-MD5 SASL plugin is installed.");
 964                 }
 965
 966                 if (type == IMAP_AUTH_SCRAM_SHA1) {
 967                         ext_info = _("\n\nSCRAM-SHA-1 logins only work if libetpan has been "
 968                                      "compiled with SASL support and the "
 969                                      "SCRAM SASL plugin is installed.");
 970                 }
 971
 972                 if (type == IMAP_AUTH_PLAIN) {
 973                         ext_info = _("\n\nPLAIN logins only work if libetpan has been "
 974                                      "compiled with SASL support and the "
 975                                      "PLAIN SASL plugin is installed.");
 976                 }
 977
 978                 if (type == IMAP_AUTH_LOGIN) {
 979                         ext_info = _("\n\nLOGIN logins only work if libetpan has been "
 980                                      "compiled with SASL support and the "
 981                                      "LOGIN SASL plugin is installed.");
 982                 }
 983
 984                 if (time(NULL) - last_login_err > 10) {
 985                         if (!prefs_common.no_recv_err_panel) {
 986                                 alertpanel_error_log(_("Connection to %s failed: "
 987                                         "login refused.%s"),
 988                                         server, ext_info);
 989                         } else {
 990                                 log_error(LOG_PROTOCOL, _("Connection to %s failed: "
 991                                         "login refused.%s\n"),
 992                                         server, ext_info);
 993                         }
 994                 }
 995                 last_login_err = time(NULL);
 996         }
 997         g_free(server);
 998         return ok;
 999 }
1000
1001 static IMAPSession *imap_reconnect_if_possible(Folder *folder, IMAPSession *session)
1002 {
1003         RemoteFolder *rfolder = REMOTE_FOLDER(folder);
1004         /* Check if this is the first try to establish a
1005            connection, if yes we don't try to reconnect */
1006         debug_print("reconnecting\n");
1007         if (rfolder->session == NULL) {
1008                 log_warning(LOG_PROTOCOL, _("Connecting to %s failed"),
1009                             folder->account->recv_server);
1010                 SESSION(session)->sock = NULL;
1011                 imap_safe_destroy(session);
1012                 session = NULL;
1013         } else {
1014                 rfolder->session = NULL;
1015                 log_warning(LOG_PROTOCOL, _("IMAP connection to %s has been"
1016                             " disconnected. Reconnecting...\n"),
1017                             folder->account->recv_server);
1018                 statusbar_print_all(_("IMAP connection to %s has been"
1019                             " disconnected. Reconnecting...\n"),
1020                             folder->account->recv_server);
1021                 SESSION(session)->state = SESSION_DISCONNECTED;
1022                 SESSION(session)->sock = NULL;
1023                 imap_safe_destroy(session);
1024                 /* Clear folders session to make imap_session_get create
1025                    a new session, because of rfolder->session == NULL
1026                    it will not try to reconnect again and so avoid an
1027                    endless loop */
1028                 debug_print("getting session...\n");
1029                 session = imap_session_get(folder);
1030                 rfolder->session = SESSION(session);
1031                 statusbar_pop_all();
1032         }
1033         return session;
1034 }
1035
1036 static IMAPSession *imap_session_get(Folder *folder)
1037 {
1038         RemoteFolder *rfolder = REMOTE_FOLDER(folder);
1039         IMAPSession *session = NULL;
1040         gint r = MAILIMAP_NO_ERROR;
1041
1042         g_return_val_if_fail(folder != NULL, NULL);
1043         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, NULL);
1044         g_return_val_if_fail(folder->account != NULL, NULL);
1045
1046         if (prefs_common.work_offline &&
1047             !inc_offline_should_override(FALSE,
1048                 _("Claws Mail needs network access in order "
1049                   "to access the IMAP server."))) {
1050                 return NULL;
1051         }
1052
1053         /* check for deferred destroy */
1054         if (rfolder->session != NULL) {
1055                 session = IMAP_SESSION(rfolder->session);
1056                 if (!session->busy && session->do_destroy) {
1057                         rfolder->session = NULL;
1058                         imap_safe_destroy(session);
1059                         session = NULL;
1060                 }
1061         }
1062
1063         /* Make sure we have a session */
1064         if (rfolder->session != NULL && rfolder->session->state != SESSION_DISCONNECTED) {
1065                 session = IMAP_SESSION(rfolder->session);
1066         } else if (rfolder->session != NULL && rfolder->session->state == SESSION_DISCONNECTED) {
1067                 imap_safe_destroy(IMAP_SESSION(rfolder->session));
1068                 rfolder->session = NULL;
1069                 goto new_conn;
1070         } else if (rfolder->connecting) {
1071                 debug_print("already connecting\n");
1072                 return NULL;
1073         } else {
1074 new_conn:
1075                 imap_reset_uid_lists(folder);
1076                 if (time(NULL) - rfolder->last_failure <= 2)
1077                         return NULL;
1078                 rfolder->connecting = TRUE;
1079                 session = imap_session_new(folder, folder->account);
1080         }
1081         if(session == NULL) {
1082                 rfolder->last_failure = time(NULL);
1083                 rfolder->connecting = FALSE;
1084                 return NULL;
1085         }
1086
1087         /* Make sure session is authenticated */
1088         if (!IMAP_SESSION(session)->authenticated)
1089                 r = imap_session_authenticate(IMAP_SESSION(session), folder->account);
1090
1091         if (r != MAILIMAP_NO_ERROR || (!is_fatal(r) && !IMAP_SESSION(session)->authenticated)) {
1092                 rfolder->session = NULL;
1093                 if (!is_fatal(r)) {
1094                         imap_threaded_disconnect(session->folder);
1095                 }
1096                 SESSION(session)->state = SESSION_DISCONNECTED;
1097                 SESSION(session)->sock = NULL;
1098                 imap_safe_destroy(session);
1099                 rfolder->last_failure = time(NULL);
1100                 rfolder->connecting = FALSE;
1101                 return NULL;
1102         }
1103
1104         /* I think the point of this code is to avoid sending a
1105          * keepalive if we've used the session recently and therefore
1106          * think it's still alive.  Unfortunately, most of the code
1107          * does not yet check for errors on the socket, and so if the
1108          * connection drops we don't notice until the timeout expires.
1109          * A better solution than sending a NOOP every time would be
1110          * for every command to be prepared to retry until it is
1111          * successfully sent. -- mbp */
1112         if ((time(NULL) - SESSION(session)->last_access_time > SESSION_TIMEOUT_INTERVAL) || session->cancelled) {
1113                 /* verify that the session is still alive */
1114                 r = imap_cmd_noop(session);
1115
1116                 if (r != MAILIMAP_NO_ERROR) {
1117                         debug_print("disconnected!\n");
1118                         if (!is_fatal(r))
1119                                 session = imap_reconnect_if_possible(folder, session);
1120                         else {
1121                                 rfolder->session = NULL;
1122                                 rfolder->connecting = FALSE;
1123                                 SESSION(session)->state = SESSION_DISCONNECTED;
1124                                 SESSION(session)->sock = NULL;
1125                                 imap_safe_destroy(session);
1126                                 session = imap_session_get(folder);
1127                         }
1128                 }
1129                 if (session)
1130                         session->cancelled = FALSE;
1131         }
1132
1133         rfolder->session = SESSION(session);
1134         rfolder->connecting = FALSE;
1135
1136         return IMAP_SESSION(session);
1137 }
1138
1139 static IMAPSession *imap_session_new(Folder * folder,
1140                                      const PrefsAccount *account)
1141 {
1142         IMAPSession *session;
1143         ProxyInfo *proxy_info = NULL;
1144         gushort port;
1145         int r;
1146         int authenticated = FALSE;
1147         gchar *buf;
1148
1149 #ifdef USE_GNUTLS
1150         /* FIXME: IMAP over SSL only... */
1151         SSLType ssl_type;
1152
1153         port = account->set_imapport ? account->imapport
1154                 : account->ssl_imap == SSL_TUNNEL ? IMAPS_PORT : IMAP4_PORT;
1155         ssl_type = account->ssl_imap;
1156 #else
1157         if (account->ssl_imap != SSL_NONE) {
1158                 if (alertpanel_full(_("Insecure connection"),
1159                         _("This connection is configured to be secured "
1160                           "using SSL/TLS, but SSL/TLS is not available "
1161                           "in this build of Claws Mail. \n\n"
1162                           "Do you want to continue connecting to this "
1163                           "server? The communication would not be "
1164                           "secure."),
1165                           GTK_STOCK_CANCEL, _("Con_tinue connecting"), NULL,
1166                                 ALERTFOCUS_FIRST, FALSE, NULL, ALERT_WARNING) != G_ALERTALTERNATE)
1167                         return NULL;
1168         }
1169         port = account->set_imapport ? account->imapport
1170                 : IMAP4_PORT;
1171 #endif
1172
1173         imap_init(folder);
1174         buf = g_strdup_printf(_("Account '%s': Connecting to IMAP server: %s:%d..."),
1175                                 folder->account->account_name, folder->account->recv_server,
1176                                 port);
1177         statusbar_print_all("%s", buf);
1178         log_message(LOG_PROTOCOL, "%s\n", buf);
1179         g_free(buf);
1180
1181         if (account->use_proxy) {
1182                 if (account->use_default_proxy) {
1183                         proxy_info = (ProxyInfo *)&(prefs_common.proxy_info);
1184                         if (proxy_info->use_proxy_auth)
1185                                 proxy_info->proxy_pass = passwd_store_get(PWS_CORE, PWS_CORE_PROXY,
1186                                         PWS_CORE_PROXY_PASS);
1187                 } else {
1188                         proxy_info = (ProxyInfo *)&(account->proxy_info);
1189                         if (proxy_info->use_proxy_auth)
1190                                 proxy_info->proxy_pass = passwd_store_get_account(account->account_id,
1191                                         PWS_ACCOUNT_PROXY_PASS);
1192                 }
1193         }
1194
1195 #ifndef G_OS_WIN32
1196         if (account->set_tunnelcmd) {
1197                 r = imap_threaded_connect_cmd(folder,
1198                                               account->tunnelcmd,
1199                                               account->recv_server,
1200                                               port);
1201         }
1202         else
1203 #endif
1204         {
1205 #ifdef USE_GNUTLS
1206
1207                 if (ssl_type == SSL_TUNNEL) {
1208                         r = imap_threaded_connect_ssl(folder,
1209                                                       account->recv_server,
1210                                                       port,
1211                                                       proxy_info);
1212                 }
1213                 else
1214 #endif
1215                 {
1216                         r = imap_threaded_connect(folder,
1217                                                   account->recv_server,
1218                                                   port,
1219                                                   proxy_info);
1220                 }
1221         }
1222
1223         statusbar_pop_all();
1224         if (r == MAILIMAP_NO_ERROR_AUTHENTICATED) {
1225                 authenticated = TRUE;
1226         }
1227         else if (r == MAILIMAP_NO_ERROR_NON_AUTHENTICATED) {
1228                 authenticated = FALSE;
1229         }
1230         else {
1231 #ifdef USE_GNUTLS
1232                 if (r == MAILIMAP_ERROR_SSL)
1233                         log_error(LOG_PROTOCOL, _("SSL/TLS handshake failed\n"));
1234                 else
1235 #endif
1236                         imap_handle_error(NULL, account->recv_server, r);
1237
1238                 if(!prefs_common.no_recv_err_panel) {
1239                         alertpanel_error_log(_("Can't connect to IMAP server: %s:%d"),
1240                                          account->recv_server, port);
1241                 } else {
1242                         log_error(LOG_PROTOCOL, _("Can't connect to IMAP server: %s:%d\n"),
1243                                          account->recv_server, port);
1244                 }
1245
1246                 return NULL;
1247         }
1248
1249         session = g_new0(IMAPSession, 1);
1250         session_init(SESSION(session), account, FALSE);
1251         SESSION(session)->type             = SESSION_IMAP;
1252         SESSION(session)->server           = g_strdup(account->recv_server);
1253         SESSION(session)->port             = port;
1254         SESSION(session)->sock             = NULL;
1255         SESSION(session)->proxy_info       = proxy_info;
1256         SESSION(session)->destroy          = imap_session_destroy;
1257
1258         session->capability = NULL;
1259         session->authenticated = authenticated;
1260         session->mbox = NULL;
1261         session->exists = 0;
1262         session->recent = 0;
1263         session->expunge = 0;
1264         session->cmd_count = 0;
1265         session->folder = folder;
1266         IMAP_FOLDER(session->folder)->last_seen_separator = 0;
1267
1268 #ifdef USE_GNUTLS
1269         if (account->ssl_imap == SSL_STARTTLS) {
1270                 gint ok;
1271
1272                 ok = imap_cmd_starttls(session);
1273                 if (ok != MAILIMAP_NO_ERROR) {
1274                         log_warning(LOG_PROTOCOL, _("Can't start STARTTLS session.\n"));
1275                         if (!is_fatal(ok)) {
1276                                 SESSION(session)->sock = NULL;
1277                                 imap_safe_destroy(session);
1278                         }
1279                         return NULL;
1280                 }
1281
1282                 imap_free_capabilities(session);
1283                 session->authenticated = FALSE;
1284                 session->uidplus = FALSE;
1285                 session->cmd_count = 1;
1286         }
1287         SESSION(session)->use_tls_sni = account->use_tls_sni;
1288 #endif
1289
1290         log_message(LOG_PROTOCOL, "IMAP connection is %s-authenticated\n",
1291                     (session->authenticated) ? "pre" : "un");
1292
1293         session_register_ping(SESSION(session), imap_ping);
1294
1295         return session;
1296 }
1297
1298 static gint imap_session_authenticate(IMAPSession *session,
1299                                       PrefsAccount *account)
1300 {
1301         gchar *pass, *acc_pass = NULL;
1302         gboolean failed = FALSE;
1303         gint ok = MAILIMAP_NO_ERROR;
1304         g_return_val_if_fail(account->userid != NULL, MAILIMAP_ERROR_BAD_STATE);
1305
1306         if (!password_get(account->userid, account->recv_server, "imap",
1307                          SESSION(session)->port, &acc_pass)) {
1308                 acc_pass = passwd_store_get_account(account->account_id,
1309                                 PWS_ACCOUNT_RECV);
1310         }
1311
1312 try_again:
1313         pass = acc_pass;
1314         if (!pass && account->imap_auth_type != IMAP_AUTH_ANON && account->imap_auth_type != IMAP_AUTH_GSSAPI) {
1315                 gchar *tmp_pass;
1316                 tmp_pass = input_dialog_query_password_keep(account->recv_server,
1317                                                             account->userid,
1318                                                             &(account->session_passwd));
1319                 if (!tmp_pass) {
1320                         return MAILIMAP_NO_ERROR;
1321                 }
1322                 Xstrdup_a(pass, tmp_pass, {g_free(tmp_pass); return MAILIMAP_NO_ERROR;});
1323                 g_free(tmp_pass);
1324         } else if (account->imap_auth_type == IMAP_AUTH_ANON || account->imap_auth_type == IMAP_AUTH_GSSAPI) {
1325                 pass = "";
1326         }
1327         if ((ok = imap_auth(session, account->userid, pass, account->imap_auth_type)) != MAILIMAP_NO_ERROR) {
1328
1329                 if (!failed && !is_fatal(ok)) {
1330                         if (acc_pass != NULL) {
1331                                 memset(acc_pass, 0, strlen(acc_pass));
1332                                 g_free(acc_pass);
1333                                 acc_pass = NULL;
1334                         }
1335                         failed = TRUE;
1336                         if (account->session_passwd != NULL) {
1337                                 g_free(account->session_passwd);
1338                                 account->session_passwd = NULL;
1339                         }
1340                         goto try_again;
1341                 } else {
1342                         if (prefs_common.no_recv_err_panel) {
1343                                 log_error(LOG_PROTOCOL, _("Couldn't login to IMAP server %s.\n"), account->recv_server);
1344                                 mainwindow_show_error();
1345                         } else
1346                                 alertpanel_error_log(_("Couldn't login to IMAP server %s."), account->recv_server);
1347                 }
1348
1349                 if (acc_pass != NULL) {
1350                         memset(acc_pass, 0, strlen(acc_pass));
1351                         g_free(acc_pass);
1352                         acc_pass = NULL;
1353                 }
1354
1355                 return ok;
1356         }
1357
1358         if (acc_pass) {
1359                 memset(acc_pass, 0, strlen(acc_pass));
1360                 g_free(acc_pass);
1361         }
1362         statusbar_pop_all();
1363         session->authenticated = TRUE;
1364         return MAILIMAP_NO_ERROR;
1365 }
1366
1367 static void imap_session_destroy(Session *session)
1368 {
1369         if (session->state != SESSION_DISCONNECTED)
1370                 imap_threaded_disconnect(IMAP_SESSION(session)->folder);
1371
1372         imap_free_capabilities(IMAP_SESSION(session));
1373         g_free(IMAP_SESSION(session)->mbox);
1374 }
1375
1376 static gchar *imap_fetch_msg(Folder *folder, FolderItem *item, gint uid)
1377 {
1378         return imap_fetch_msg_full(folder, item, uid, TRUE, TRUE);
1379 }
1380
1381 static guint get_file_size_with_crs(const gchar *filename)
1382 {
1383         FILE *fp = NULL;
1384         guint cnt = 0;
1385         gchar buf[4096];
1386
1387         if (filename == NULL)
1388                 return -1;
1389
1390         fp = claws_fopen(filename, "rb");
1391         if (!fp)
1392                 return -1;
1393
1394         while (claws_fgets(buf, sizeof (buf), fp) != NULL) {
1395                 cnt += strlen(buf);
1396                 if (!strstr(buf, "\r\n") && strstr(buf, "\n"))
1397                         cnt++;
1398         }
1399
1400         claws_fclose(fp);
1401         return cnt;
1402 }
1403
1404 static gchar *imap_get_cached_filename(FolderItem *item, guint msgnum)
1405 {
1406         gchar *path, *filename;
1407
1408         cm_return_val_if_fail(item != NULL, NULL);
1409
1410         path = folder_item_get_path(item);
1411
1412         if (!is_dir_exist(path)) {
1413                 g_free(path);
1414                 return NULL;
1415         }
1416
1417         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(msgnum), NULL);
1418
1419         if (is_dir_exist(filename)) {
1420                 g_free(filename);
1421                 filename = g_strconcat(path, G_DIR_SEPARATOR_S, ".", itos(msgnum), NULL);
1422         }
1423         g_free(path);
1424
1425         return filename;
1426 }
1427
1428 static void imap_remove_cached_msg(Folder *folder, FolderItem *item, MsgInfo *msginfo)
1429 {
1430         gchar *filename;
1431
1432         filename = imap_get_cached_filename(item, msginfo->msgnum);
1433
1434         cm_return_if_fail(filename != NULL);
1435
1436         if (is_file_exist(filename)) {
1437                 claws_unlink(filename);
1438         }
1439         g_free(filename);
1440 }
1441
1442 typedef struct _TagsData {
1443         gchar *str;
1444         GSList *msglist;
1445         IMAPFolderItem *item;
1446 } TagsData;
1447
1448 static void imap_commit_tags(FolderItem *item, MsgInfo *msginfo, GSList *tags_set, GSList *tags_unset)
1449 {
1450         IMAPSession *session;
1451         gint ok, can_create_tags;
1452         Folder *folder = NULL;
1453         TagsData *ht_data = NULL;
1454         GSList *cur;
1455
1456         g_return_if_fail(item != NULL);
1457         g_return_if_fail(msginfo != NULL);
1458
1459         folder = item->folder;
1460         debug_print("getting session...\n");
1461         session = imap_session_get(folder);
1462
1463         if (!session) {
1464                 debug_print("can't get session\n");
1465                 return;
1466         }
1467
1468         ok = imap_select(session, IMAP_FOLDER(folder), item,
1469                          NULL, NULL, NULL, NULL, &can_create_tags, FALSE);
1470
1471         if (ok != MAILIMAP_NO_ERROR) {
1472                 return;
1473         }
1474
1475
1476         if (IMAP_FOLDER_ITEM(item)->can_create_flags != ITEM_CAN_CREATE_FLAGS)
1477                 return;
1478
1479         if (IMAP_FOLDER_ITEM(item)->batching) {
1480                 /* instead of performing an UID STORE command for each message change,
1481                  * as a lot of them can change "together", we just fill in hashtables
1482                  * and defer the treatment so that we're able to send only one
1483                  * command.
1484                  */
1485                 debug_print("IMAP batch mode on, deferring tags change\n");
1486                 for (cur = tags_set; cur; cur = cur->next) {
1487                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1488                         if (cur_tag) {
1489                                 ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->tags_set_table,
1490                                         GINT_TO_POINTER(cur_tag));
1491                                 if (ht_data == NULL) {
1492                                         ht_data = g_new0(TagsData, 1);
1493                                         ht_data->str = g_strdup(tags_get_tag(cur_tag));
1494                                         ht_data->item = IMAP_FOLDER_ITEM(item);
1495                                         g_hash_table_insert(IMAP_FOLDER_ITEM(item)->tags_set_table,
1496                                                 GINT_TO_POINTER(cur_tag), ht_data);
1497                                 }
1498                                 ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
1499                         }
1500                 }
1501                 for (cur = tags_unset; cur; cur = cur->next) {
1502                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1503                         if (cur_tag) {
1504                                 ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->tags_unset_table,
1505                                         GINT_TO_POINTER(cur_tag));
1506                                 if (ht_data == NULL) {
1507                                         ht_data = g_new0(TagsData, 1);
1508                                         ht_data->str = g_strdup(tags_get_tag(cur_tag));
1509                                         ht_data->item = IMAP_FOLDER_ITEM(item);
1510                                         g_hash_table_insert(IMAP_FOLDER_ITEM(item)->tags_unset_table,
1511                                                 GINT_TO_POINTER(cur_tag), ht_data);
1512                                 }
1513                                 ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
1514                         }
1515                 }
1516         } else {
1517                 GSList *list_set = NULL;
1518                 GSList *list_unset = NULL;
1519                 GSList numlist;
1520
1521                 numlist.data = GINT_TO_POINTER(msginfo->msgnum);
1522                 numlist.next = NULL;
1523
1524                 debug_print("IMAP changing tags NOW\n");
1525                 for (cur = tags_set; cur; cur = cur->next) {
1526                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1527                         const gchar *str = tags_get_tag(cur_tag);
1528                         if (IS_NOT_RESERVED_TAG(str))
1529                                 list_set = g_slist_prepend(list_set, g_strdup(str));
1530                 }
1531                 if (list_set) {
1532                         ok = imap_set_message_flags(session,
1533                                 IMAP_FOLDER_ITEM(item), &numlist, 0, list_set, TRUE);
1534                         slist_free_strings_full(list_set);
1535                         if (ok != MAILIMAP_NO_ERROR) {
1536                                 return;
1537                         }
1538                 }
1539
1540                 for (cur = tags_unset; cur; cur = cur->next) {
1541                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1542                         const gchar *str = tags_get_tag(cur_tag);
1543                         if (IS_NOT_RESERVED_TAG(str))
1544                                 list_unset = g_slist_prepend(list_unset, g_strdup(str));
1545                 }
1546                 if (list_unset) {
1547                         ok = imap_set_message_flags(session,
1548                                 IMAP_FOLDER_ITEM(item), &numlist, 0, list_unset, FALSE);
1549                         slist_free_strings_full(list_unset);
1550                         if (ok != MAILIMAP_NO_ERROR) {
1551                                 return;
1552                         }
1553                 }
1554         }
1555 }
1556
1557 static gchar *imap_fetch_msg_full(Folder *folder, FolderItem *item, gint uid,
1558                                   gboolean headers, gboolean body)
1559 {
1560         gchar *path, *filename;
1561         IMAPSession *session;
1562         gint ok;
1563
1564         g_return_val_if_fail(folder != NULL, NULL);
1565         g_return_val_if_fail(item != NULL, NULL);
1566
1567         if (uid == 0)
1568                 return NULL;
1569
1570         path = folder_item_get_path(item);
1571         if (!is_dir_exist(path)) {
1572                 if(is_file_exist(path))
1573                         claws_unlink(path);
1574                 make_dir_hier(path);
1575         }
1576         g_free(path);
1577
1578         filename = imap_get_cached_filename(item, uid);
1579         debug_print("trying to fetch cached %s\n", filename);
1580
1581         if (is_file_exist(filename)) {
1582                 /* see whether the local file represents the whole message
1583                  * or not. As the IMAP server reports size with \r chars,
1584                  * we have to update the local file (UNIX \n only) size */
1585                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1586                 guint have_size = -1;
1587
1588                 if (cached)
1589                         debug_print("message %d has been already %scached.\n", uid,
1590                                 MSG_IS_FULLY_CACHED(cached->flags) ? "fully ":"");
1591
1592                 if (!cached || !MSG_IS_FULLY_CACHED(cached->flags)) {
1593                         have_size = get_file_size_with_crs(filename);
1594                         if (cached && (cached->size <= have_size || !body)) {
1595                                 ok = file_strip_crs(filename);
1596                                 if (ok == 0 && cached && cached->size <= have_size) {
1597                                         /* we have it all and stripped */
1598                                         debug_print("...fully cached in fact (%u/%"G_GOFFSET_FORMAT"); setting flag.\n",
1599                                                         have_size, cached->size);
1600                                         procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1601                                 }
1602                                 procmsg_msginfo_free(&cached);
1603                                 return filename;
1604                         } else if (!cached && time(NULL) - get_file_mtime(filename) < 60) {
1605                                 debug_print("message not cached and file recent, considering file complete\n");
1606                                 ok = file_strip_crs(filename);
1607                                 if (ok == 0)
1608                                         return filename;
1609                         } else {
1610                                 procmsg_msginfo_free(&cached);
1611                         }
1612                 }
1613                 if (cached && MSG_IS_FULLY_CACHED(cached->flags)) {
1614                         procmsg_msginfo_free(&cached);
1615                         return filename;
1616                 }
1617         } else {
1618                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1619                 if (cached) {
1620                         procmsg_msginfo_unset_flags(cached, MSG_FULLY_CACHED, 0);
1621                         procmsg_msginfo_free(&cached);
1622                 }
1623         }
1624
1625         debug_print("getting session...\n");
1626         session = imap_session_get(folder);
1627
1628         if (!session) {
1629                 g_free(filename);
1630                 return NULL;
1631         }
1632         session_set_access_time(SESSION(session));
1633         lock_session(session); /* unlocked later in the function */
1634
1635         debug_print("IMAP fetching messages\n");
1636         ok = imap_select(session, IMAP_FOLDER(folder), item,
1637                          NULL, NULL, NULL, NULL, NULL, FALSE);
1638         if (ok != MAILIMAP_NO_ERROR) {
1639                 g_warning("can't select mailbox %s", item->path);
1640                 g_free(filename);
1641                 return NULL;
1642         }
1643
1644         session_set_access_time(SESSION(session));
1645
1646         debug_print("getting message %d...\n", uid);
1647         ok = imap_cmd_fetch(session, (guint32)uid, filename, headers, body);
1648
1649         if (ok != MAILIMAP_NO_ERROR) {
1650                 g_warning("can't fetch message %d", uid);
1651                 g_free(filename);
1652                 return NULL;
1653         }
1654
1655         session_set_access_time(SESSION(session));
1656         unlock_session(session);
1657
1658         ok = file_strip_crs(filename);
1659
1660         if (ok == 0 && headers && body) {
1661                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1662                 if (cached) {
1663                         procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1664                         procmsg_msginfo_free(&cached);
1665                 }
1666         } else if (ok == -1) {
1667                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1668                 if (cached) {
1669                         procmsg_msginfo_unset_flags(cached, MSG_FULLY_CACHED, 0);
1670                         procmsg_msginfo_free(&cached);
1671                 }
1672         }
1673         return filename;
1674 }
1675
1676 static gboolean imap_is_msg_fully_cached(Folder *folder, FolderItem *item, gint uid)
1677 {
1678         gchar *filename;
1679         guint size = 0;
1680         MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1681
1682         if (!cached)
1683                 return FALSE;
1684
1685         if (MSG_IS_FULLY_CACHED(cached->flags)) {
1686                 procmsg_msginfo_free(&cached);
1687                 return TRUE;
1688         }
1689
1690         filename = imap_get_cached_filename(item, uid);
1691
1692         if (is_file_exist(filename)) {
1693                 if (cached && cached->total_size == cached->size) {
1694                         /* fast path */
1695                         g_free(filename);
1696                         procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1697                         return TRUE;
1698                 }
1699                 size = get_file_size_with_crs(filename);
1700         }
1701         g_free(filename);
1702         debug_print("msg %d cached, has size %d, full should be %"G_GOFFSET_FORMAT".\n", uid, size, cached->size);
1703         if (cached && size >= cached->size) {
1704                 cached->total_size = cached->size;
1705                 procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1706                 procmsg_msginfo_free(&cached);
1707                 return TRUE;
1708         }
1709         if (cached)
1710                 procmsg_msginfo_free(&cached);
1711         return FALSE;
1712 }
1713
1714 void imap_cache_msg(FolderItem *item, gint msgnum)
1715 {
1716         Folder *folder = NULL;
1717
1718         if (!item)
1719                 return;
1720         folder = item->folder;
1721
1722         if (!imap_is_msg_fully_cached(folder, item, msgnum)) {
1723                 gchar *tmp = imap_fetch_msg_full(folder, item, msgnum, TRUE, TRUE);
1724                 debug_print("fetched %s\n", tmp);
1725                 g_free(tmp);
1726         }
1727 }
1728
1729 static gint imap_add_msg(Folder *folder, FolderItem *dest,
1730                          const gchar *file, MsgFlags *flags)
1731 {
1732         gint ret;
1733         GSList file_list;
1734         MsgFileInfo fileinfo;
1735
1736         g_return_val_if_fail(file != NULL, -1);
1737
1738         fileinfo.msginfo = NULL;
1739         fileinfo.file = (gchar *)file;
1740         fileinfo.flags = flags;
1741         file_list.data = &fileinfo;
1742         file_list.next = NULL;
1743
1744         ret = imap_add_msgs(folder, dest, &file_list, NULL);
1745         return ret;
1746 }
1747
1748 static gint imap_add_msgs(Folder *folder, FolderItem *dest, GSList *file_list,
1749                    GHashTable *relation)
1750 {
1751         gchar *destdir;
1752         IMAPSession *session;
1753         guint32 last_uid = 0;
1754         GSList *cur;
1755         MsgFileInfo *fileinfo;
1756         gint ok = MAILIMAP_NO_ERROR;
1757         gint curnum = 0, total = 0;
1758         gboolean missing_uids = FALSE;
1759
1760         g_return_val_if_fail(folder != NULL, -1);
1761         g_return_val_if_fail(dest != NULL, -1);
1762         g_return_val_if_fail(file_list != NULL, -1);
1763
1764         debug_print("getting session...\n");
1765         session = imap_session_get(folder);
1766         if (!session) {
1767                 return -1;
1768         }
1769         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
1770         if (is_fatal(ok)) {
1771                 g_free(destdir);
1772                 return -1;
1773         }
1774         statusbar_print_all(_("Adding messages..."));
1775         total = g_slist_length(file_list);
1776         for (cur = file_list; cur != NULL; cur = cur->next) {
1777                 IMAPFlags iflags = 0;
1778                 guint32 new_uid = 0;
1779                 gchar *real_file = NULL;
1780                 fileinfo = (MsgFileInfo *)cur->data;
1781
1782                 statusbar_progress_all(curnum, total, total < 10 ? 1:10);
1783                 curnum++;
1784
1785                 if (fileinfo->flags) {
1786                         if (MSG_IS_MARKED(*fileinfo->flags))
1787                                 iflags |= IMAP_FLAG_FLAGGED;
1788                         if (MSG_IS_REPLIED(*fileinfo->flags))
1789                                 iflags |= IMAP_FLAG_ANSWERED;
1790                         if (MSG_IS_FORWARDED(*fileinfo->flags))
1791                                 iflags |= IMAP_FLAG_FORWARDED;
1792                         if (MSG_IS_SPAM(*fileinfo->flags))
1793                                 iflags |= IMAP_FLAG_SPAM;
1794                         else
1795                                 iflags |= IMAP_FLAG_HAM;
1796                         if (!MSG_IS_UNREAD(*fileinfo->flags))
1797                                 iflags |= IMAP_FLAG_SEEN;
1798
1799                 }
1800
1801                 if (real_file == NULL)
1802                         real_file = g_strdup(fileinfo->file);
1803
1804                 if (folder_has_parent_of_type(dest, F_QUEUE) ||
1805                     folder_has_parent_of_type(dest, F_OUTBOX) ||
1806                     folder_has_parent_of_type(dest, F_DRAFT) ||
1807                     folder_has_parent_of_type(dest, F_TRASH))
1808                         iflags |= IMAP_FLAG_SEEN;
1809
1810                 ok = imap_cmd_append(session, IMAP_FOLDER_ITEM(dest), destdir, real_file, iflags,
1811                                      &new_uid);
1812
1813                 if (ok != MAILIMAP_NO_ERROR) {
1814                         g_warning("can't append message %s", real_file);
1815                         g_free(real_file);
1816                         g_free(destdir);
1817                         statusbar_progress_all(0,0,0);
1818                         statusbar_pop_all();
1819                         return -1;
1820                 } else {
1821                         debug_print("appended new message as %d\n", new_uid);
1822                         /* put the local file in the imapcache, so that we don't
1823                          * have to fetch it back later. */
1824
1825                         if (new_uid == 0) {
1826                                 missing_uids = TRUE;
1827                                 debug_print("Missing UID (0)\n");
1828                         }
1829                         if (new_uid > 0) {
1830                                 gchar *cache_path = folder_item_get_path(dest);
1831                                 if (!is_dir_exist(cache_path))
1832                                         make_dir_hier(cache_path);
1833                                 if (is_dir_exist(cache_path)) {
1834                                         gchar *cache_file = g_strconcat(
1835                                                 cache_path, G_DIR_SEPARATOR_S,
1836                                                 itos(new_uid), NULL);
1837                                         copy_file(real_file, cache_file, TRUE);
1838                                         debug_print("got UID %d, copied to cache: %s\n", new_uid, cache_file);
1839                                         g_free(cache_file);
1840                                 }
1841                                 g_free(cache_path);
1842                         }
1843                 }
1844
1845                 if (relation != NULL)
1846                         g_hash_table_insert(relation, fileinfo->msginfo != NULL ?
1847                                           (gpointer) fileinfo->msginfo : (gpointer) fileinfo,
1848                                           GINT_TO_POINTER(new_uid));
1849                 if (last_uid < new_uid) {
1850                         last_uid = new_uid;
1851                 }
1852
1853                 g_free(real_file);
1854         }
1855
1856         statusbar_progress_all(0,0,0);
1857         statusbar_pop_all();
1858
1859
1860         g_free(destdir);
1861
1862         imap_scan_required(folder, dest);
1863
1864         session = imap_session_get(folder);
1865         if (!session) {
1866                 return -1;
1867         }
1868         if (missing_uids) {
1869                 gint a;
1870                 ok = imap_select(session, IMAP_FOLDER(folder), dest,
1871                          &a, NULL, NULL, NULL, NULL, FALSE);
1872         }
1873         return last_uid;
1874 }
1875
1876 static GSList *flatten_mailimap_set(struct mailimap_set * set)
1877 {
1878         GSList *result = NULL;
1879         clistiter *list;
1880         guint32 start, end, t;
1881         GSList *cur;
1882
1883         if (!set || !set->set_list)
1884                 return NULL;
1885
1886         for (list = clist_begin(set->set_list); list; list = clist_next(list)) {
1887                 struct mailimap_set_item *item = (struct mailimap_set_item *)clist_content(list);
1888                 start = item->set_first;
1889                 end = item->set_last;
1890                 if (start <= end) {
1891                         for (t = start; t <= end; t++) {
1892                                 result = g_slist_prepend(result, GINT_TO_POINTER(t));
1893                         }
1894                 }
1895         }
1896         result = g_slist_reverse(result);
1897         if (debug_get_mode()) {
1898                 debug_print("flat imap set: ");
1899                 for (cur = result; cur; cur = cur->next) {
1900                         debug_print("%d ", GPOINTER_TO_INT(cur->data));
1901                 }
1902                 debug_print("\n");
1903         }
1904
1905         return result;
1906 }
1907 static gint imap_do_copy_msgs(Folder *folder, FolderItem *dest,
1908                               MsgInfoList *msglist, GHashTable *relation,
1909                               gboolean same_dest_ok)
1910 {
1911         FolderItem *src;
1912         gchar *destdir;
1913         GSList *seq_list, *cur;
1914         MsgInfo *msginfo;
1915         IMAPSession *session;
1916         gint ok = MAILIMAP_NO_ERROR;
1917         GHashTable *uid_hash;
1918         gint last_num = 0;
1919
1920         g_return_val_if_fail(folder != NULL, -1);
1921         g_return_val_if_fail(dest != NULL, -1);
1922         g_return_val_if_fail(msglist != NULL, -1);
1923
1924         debug_print("getting session...\n");
1925         session = imap_session_get(folder);
1926
1927         if (!session) {
1928                 return -1;
1929         }
1930
1931         msginfo = (MsgInfo *)msglist->data;
1932         src = msginfo->folder;
1933         if (!same_dest_ok && src == dest) {
1934                 g_warning("the src folder is identical to the dest.");
1935                 return -1;
1936         }
1937
1938         if (src->folder != dest->folder) {
1939                 GSList *infolist = NULL, *cur;
1940                 int res = -1;
1941                 for (cur = msglist; cur; cur = cur->next) {
1942                         msginfo = (MsgInfo *)cur->data;
1943                         MsgFileInfo *fileinfo = g_new0(MsgFileInfo, 1);
1944                         fileinfo->file = procmsg_get_message_file(msginfo);
1945                         fileinfo->flags = &(msginfo->flags);
1946                         infolist = g_slist_prepend(infolist, fileinfo);
1947                 }
1948                 infolist = g_slist_reverse(infolist);
1949                 res = folder_item_add_msgs(dest, infolist, FALSE);
1950                 for (cur = infolist; cur; cur = cur->next) {
1951                         MsgFileInfo *info = (MsgFileInfo *)cur->data;
1952                         g_free(info->file);
1953                         g_free(info);
1954                 }
1955                 g_slist_free(infolist);
1956                 return res;
1957         }
1958
1959         lock_session(session); /* unlocked later in the function */
1960
1961         ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
1962                          NULL, NULL, NULL, NULL, NULL, FALSE);
1963         if (ok != MAILIMAP_NO_ERROR) {
1964                 return ok;
1965         }
1966
1967         unlock_session(session);
1968
1969         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
1970
1971         if (is_fatal(ok)) {
1972                 g_free(destdir);
1973                 return ok;
1974         }
1975
1976         seq_list = imap_get_lep_set_from_msglist(IMAP_FOLDER(folder), msglist);
1977         uid_hash = g_hash_table_new(g_direct_hash, g_direct_equal);
1978
1979         statusbar_print_all(_("Copying messages..."));
1980         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
1981                 struct mailimap_set * seq_set;
1982                 struct mailimap_set * source = NULL;
1983                 struct mailimap_set * dest = NULL;
1984                 seq_set = cur->data;
1985
1986                 debug_print("Copying messages from %s to %s ...\n",
1987                             src->path, destdir);
1988
1989                 lock_session(session); /* unlocked later in the function */
1990                 ok = imap_cmd_copy(session, seq_set, destdir,
1991                         &source, &dest);
1992
1993                 if (is_fatal(ok)) {
1994                         session = NULL;
1995                 }
1996
1997                 if (ok == MAILIMAP_NO_ERROR) {
1998                         unlock_session(session);
1999                         if (relation && source && dest) {
2000                                 GSList *s_list = flatten_mailimap_set(source);
2001                                 GSList *d_list = flatten_mailimap_set(dest);
2002                                 GSList *s_cur, *d_cur;
2003                                 if (g_slist_length(s_list) == g_slist_length(d_list)) {
2004
2005                                         for (s_cur = s_list, d_cur = d_list;
2006                                              s_cur && d_cur;
2007                                              s_cur = s_cur->next, d_cur = d_cur->next) {
2008                                                 g_hash_table_insert(uid_hash, s_cur->data, d_cur->data);
2009                                         }
2010
2011                                 } else {
2012                                         debug_print("hhhmm, source list length != dest list length.\n");
2013                                 }
2014                                 g_slist_free(s_list);
2015                                 g_slist_free(d_list);
2016                         }
2017                 }
2018
2019
2020                 if (source)
2021                         mailimap_set_free(source);
2022                 if (dest)
2023                         mailimap_set_free(dest);
2024
2025                 if (ok != MAILIMAP_NO_ERROR) {
2026                         g_hash_table_destroy(uid_hash);
2027                         imap_lep_set_free(seq_list);
2028                         statusbar_pop_all();
2029                         return -1;
2030                 }
2031         }
2032
2033         for (cur = msglist; cur != NULL; cur = g_slist_next(cur)) {
2034                 MsgInfo *msginfo = (MsgInfo *)cur->data;
2035                 gpointer hashval;
2036
2037                 hashval = g_hash_table_lookup(uid_hash, GINT_TO_POINTER(msginfo->msgnum));
2038
2039                 if (hashval != NULL) {
2040                         gint num = GPOINTER_TO_INT(hashval);
2041                         g_hash_table_insert(relation, msginfo,
2042                                           GINT_TO_POINTER(num));
2043                         if (num > last_num)
2044                                 last_num = num;
2045                         debug_print("copied message %d as %d\n", msginfo->msgnum, num);
2046                         /* put the local file in the imapcache, so that we don't
2047                          * have to fetch it back later. */
2048                         if (num > 0) {
2049                                 gchar *cache_path = folder_item_get_path(msginfo->folder);
2050                                 gchar *real_file = g_strconcat(
2051                                         cache_path, G_DIR_SEPARATOR_S,
2052                                         itos(msginfo->msgnum), NULL);
2053                                 gchar *cache_file = NULL;
2054                                 g_free(cache_path);
2055                                 cache_path = folder_item_get_path(dest);
2056                                 cache_file = g_strconcat(
2057                                         cache_path, G_DIR_SEPARATOR_S,
2058                                         itos(num), NULL);
2059                                 if (!is_dir_exist(cache_path))
2060                                         make_dir_hier(cache_path);
2061                                 if (is_file_exist(real_file) && is_dir_exist(cache_path)) {
2062                                         if (copy_file(real_file, cache_file, TRUE) < 0)
2063                                                 debug_print("couldn't cache to %s: %s\n", cache_file,
2064                                                             strerror(errno));
2065                                         else
2066                                                 debug_print("copied to cache: %s\n", cache_file);
2067                                 }
2068                                 g_free(real_file);
2069                                 g_free(cache_file);
2070                                 g_free(cache_path);
2071                         }
2072                 } else
2073                         g_hash_table_insert(relation, msginfo,
2074                                           GINT_TO_POINTER(0));
2075         }
2076         statusbar_pop_all();
2077
2078         g_hash_table_destroy(uid_hash);
2079         imap_lep_set_free(seq_list);
2080
2081         g_free(destdir);
2082
2083         IMAP_FOLDER_ITEM(dest)->lastuid = 0;
2084         IMAP_FOLDER_ITEM(dest)->uid_next = 0;
2085         g_slist_free(IMAP_FOLDER_ITEM(dest)->uid_list);
2086         IMAP_FOLDER_ITEM(dest)->uid_list = NULL;
2087
2088         imap_scan_required(folder, dest);
2089         if (ok == MAILIMAP_NO_ERROR)
2090                 return last_num;
2091         else
2092                 return -1;
2093 }
2094
2095 static gint imap_copy_msg(Folder *folder, FolderItem *dest, MsgInfo *msginfo)
2096 {
2097         GSList msglist;
2098
2099         g_return_val_if_fail(msginfo != NULL, -1);
2100
2101         msglist.data = msginfo;
2102         msglist.next = NULL;
2103
2104         return imap_copy_msgs(folder, dest, &msglist, NULL);
2105 }
2106
2107 static gint imap_copy_msgs(Folder *folder, FolderItem *dest,
2108                     MsgInfoList *msglist, GHashTable *relation)
2109 {
2110         MsgInfo *msginfo;
2111         gint ret;
2112
2113         g_return_val_if_fail(folder != NULL, -1);
2114         g_return_val_if_fail(dest != NULL, -1);
2115         g_return_val_if_fail(msglist != NULL, -1);
2116
2117         msginfo = (MsgInfo *)msglist->data;
2118         g_return_val_if_fail(msginfo->folder != NULL, -1);
2119
2120         ret = imap_do_copy_msgs(folder, dest, msglist, relation, FALSE);
2121         return ret;
2122 }
2123
2124 static gboolean imap_matcher_type_is_local(gint matchertype)
2125 {
2126         switch (matchertype) {
2127         case MATCHCRITERIA_FROM:
2128         case MATCHCRITERIA_TO:
2129         case MATCHCRITERIA_CC:
2130         case MATCHCRITERIA_TO_OR_CC:
2131         case MATCHCRITERIA_SUBJECT:
2132         case MATCHCRITERIA_REFERENCES:
2133         case MATCHCRITERIA_MESSAGEID:
2134         case MATCHCRITERIA_INREPLYTO:
2135         case MATCHCRITERIA_AGE_GREATER:
2136         case MATCHCRITERIA_AGE_LOWER:
2137         case MATCHCRITERIA_FORWARDED:
2138         case MATCHCRITERIA_SPAM:
2139         case MATCHCRITERIA_UNREAD:
2140         case MATCHCRITERIA_NEW:
2141         case MATCHCRITERIA_MARKED:
2142         case MATCHCRITERIA_REPLIED:
2143         case MATCHCRITERIA_DELETED:
2144         case MATCHCRITERIA_SIZE_GREATER:
2145         case MATCHCRITERIA_SIZE_SMALLER:
2146         case MATCHCRITERIA_SIZE_EQUAL:
2147                 return TRUE;
2148         }
2149         return FALSE;
2150 }
2151
2152 static IMAPSearchKey* search_make_key(MatcherProp* match, gboolean* is_all)
2153 {
2154         if (match->matchtype == MATCHTYPE_MATCHCASE || match->matchtype == MATCHTYPE_MATCH) {
2155                 IMAPSearchKey* result = NULL;
2156                 gboolean invert = FALSE;
2157                 gint matchertype = match->criteria;
2158
2159                 if (is_all) {
2160                         *is_all = FALSE;
2161                 }
2162
2163                 switch (matchertype) {
2164                 case MATCHCRITERIA_NOT_NEW: invert = TRUE; matchertype = MATCHCRITERIA_NEW; break;
2165                 case MATCHCRITERIA_NOT_MARKED: invert = TRUE; matchertype = MATCHCRITERIA_MARKED; break;
2166                 case MATCHCRITERIA_NOT_FORWARDED: invert = TRUE; matchertype = MATCHCRITERIA_FORWARDED; break;
2167                 case MATCHCRITERIA_NOT_SPAM: invert = TRUE; matchertype = MATCHCRITERIA_SPAM; break;
2168                 case MATCHCRITERIA_NOT_SUBJECT: invert = TRUE; matchertype = MATCHCRITERIA_SUBJECT; break;
2169                 case MATCHCRITERIA_NOT_FROM: invert = TRUE; matchertype = MATCHCRITERIA_FROM; break;
2170                 case MATCHCRITERIA_NOT_TO: invert = TRUE; matchertype = MATCHCRITERIA_TO; break;
2171                 case MATCHCRITERIA_NOT_CC: invert = TRUE; matchertype = MATCHCRITERIA_CC; break;
2172                 case MATCHCRITERIA_NOT_REFERENCES: invert = TRUE; matchertype = MATCHCRITERIA_REFERENCES; break;
2173                 case MATCHCRITERIA_NOT_HEADER: invert = TRUE; matchertype = MATCHCRITERIA_HEADER; break;
2174                 case MATCHCRITERIA_NOT_TAG: invert = TRUE; matchertype = MATCHCRITERIA_TAG; break;
2175                 case MATCHCRITERIA_NOT_HEADERS_PART: invert = TRUE; matchertype = MATCHCRITERIA_HEADERS_PART; break;
2176                 case MATCHCRITERIA_NOT_HEADERS_CONT: invert = TRUE; matchertype = MATCHCRITERIA_HEADERS_CONT; break;
2177                 case MATCHCRITERIA_NOT_MESSAGE: invert = TRUE; matchertype = MATCHCRITERIA_MESSAGE; break;
2178                 case MATCHCRITERIA_NOT_BODY_PART: invert = TRUE; matchertype = MATCHCRITERIA_BODY_PART; break;
2179                 case MATCHCRITERIA_NOT_TO_AND_NOT_CC: invert = TRUE; matchertype = MATCHCRITERIA_TO_OR_CC; break;
2180                 case MATCHCRITERIA_NOT_MESSAGEID: invert = TRUE; matchertype = MATCHCRITERIA_MESSAGEID; break;
2181                 case MATCHCRITERIA_NOT_INREPLYTO: invert = TRUE; matchertype = MATCHCRITERIA_INREPLYTO; break;
2182                 }
2183
2184                 /*
2185                  * this aborts conversion even for predicates understood by the following code.
2186                  * while that might seem wasteful, claws local search for information listed below
2187                  * has proven faster than IMAP search plus network roundtrips. once this changes,
2188                  * consider removing these exceptions.
2189                  */
2190                 if (imap_matcher_type_is_local(matchertype))
2191                         return NULL;
2192
2193                 /* the Message-ID header is also cached */
2194                 if (matchertype == MATCHCRITERIA_HEADER && g_strcmp0("Message-ID", match->header) == 0) {
2195                         return NULL;
2196                 }
2197
2198                 switch (matchertype) {
2199                 case MATCHCRITERIA_FORWARDED:
2200                         result = imap_search_new(IMAP_SEARCH_CRITERIA_TAG, NULL, RTAG_FORWARDED, 0);
2201                         break;
2202
2203                 case MATCHCRITERIA_SPAM:
2204                         result = imap_search_new(IMAP_SEARCH_CRITERIA_TAG, NULL, RTAG_JUNK, 0);
2205                         break;
2206
2207                 case MATCHCRITERIA_MESSAGEID:
2208                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, "Message-ID", match->expr, 0);
2209                         break;
2210
2211                 case MATCHCRITERIA_INREPLYTO:
2212                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, "In-Reply-To", match->expr, 0);
2213                         break;
2214
2215                 case MATCHCRITERIA_REFERENCES:
2216                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, "References", match->expr, 0);
2217                         break;
2218
2219                 case MATCHCRITERIA_TO_OR_CC:
2220                         result = imap_search_or(
2221                                         imap_search_new(IMAP_SEARCH_CRITERIA_TO, NULL, match->expr, 0),
2222                                         imap_search_new(IMAP_SEARCH_CRITERIA_CC, NULL, match->expr, 0)
2223                                         );
2224                         break;
2225
2226                 case MATCHCRITERIA_HEADERS_PART:
2227                 case MATCHCRITERIA_HEADERS_CONT:
2228                         result = imap_search_and(
2229                                         imap_search_not(imap_search_new(IMAP_SEARCH_CRITERIA_BODY, NULL, match->expr, 0)),
2230                                         imap_search_new(IMAP_SEARCH_CRITERIA_MESSAGE, NULL, match->expr, 0)
2231                                         );
2232                         break;
2233
2234                 case MATCHCRITERIA_SIZE_EQUAL:
2235                         result = imap_search_and(
2236                                         imap_search_not(imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_SMALLER, NULL, NULL, match->value)),
2237                                         imap_search_not(imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_GREATER, NULL, NULL, match->value))
2238                                         );
2239                         break;
2240
2241                 case MATCHCRITERIA_NOT_UNREAD:
2242                         result = imap_search_new(IMAP_SEARCH_CRITERIA_READ, NULL, NULL, 0);
2243                         break;
2244
2245                 case MATCHCRITERIA_UNREAD:
2246                         result = imap_search_new(IMAP_SEARCH_CRITERIA_UNREAD, NULL, NULL, 0);
2247                         break;
2248
2249                 case MATCHCRITERIA_NEW:
2250                         result = imap_search_new(IMAP_SEARCH_CRITERIA_NEW, NULL, NULL, 0);
2251                         break;
2252
2253                 case MATCHCRITERIA_MARKED:
2254                         result = imap_search_new(IMAP_SEARCH_CRITERIA_MARKED, NULL, NULL, 0);
2255                         break;
2256
2257                 case MATCHCRITERIA_DELETED:
2258                         result = imap_search_new(IMAP_SEARCH_CRITERIA_DELETED, NULL, NULL, 0);
2259                         break;
2260
2261                 case MATCHCRITERIA_REPLIED:
2262                         result = imap_search_new(IMAP_SEARCH_CRITERIA_REPLIED, NULL, NULL, 0);
2263                         break;
2264
2265                 case MATCHCRITERIA_TAG:
2266                         {
2267                                 gchar *tmp = imap_utf8_to_modified_utf7(match->expr, TRUE);
2268                                 result = imap_search_new(IMAP_SEARCH_CRITERIA_TAG, NULL, tmp, 0);
2269                                 g_free(tmp);
2270                         }
2271                         break;
2272
2273                 case MATCHCRITERIA_SUBJECT:
2274                         result = imap_search_new(IMAP_SEARCH_CRITERIA_SUBJECT, NULL, match->expr, 0);
2275                         break;
2276
2277                 case MATCHCRITERIA_FROM:
2278                         result = imap_search_new(IMAP_SEARCH_CRITERIA_FROM, NULL, match->expr, 0);
2279                         break;
2280
2281                 case MATCHCRITERIA_TO:
2282                         result = imap_search_new(IMAP_SEARCH_CRITERIA_TO, NULL, match->expr, 0);
2283                         break;
2284
2285                 case MATCHCRITERIA_CC:
2286                         result = imap_search_new(IMAP_SEARCH_CRITERIA_CC, NULL, match->expr, 0);
2287                         break;
2288
2289                 case MATCHCRITERIA_AGE_GREATER:
2290                         result = imap_search_new(IMAP_SEARCH_CRITERIA_AGE_GREATER, NULL, NULL, match->value);
2291                         break;
2292
2293                 case MATCHCRITERIA_AGE_LOWER:
2294                         result = imap_search_new(IMAP_SEARCH_CRITERIA_AGE_LOWER, NULL, NULL, match->value);
2295                         break;
2296
2297                 case MATCHCRITERIA_BODY_PART:
2298                         result = imap_search_new(IMAP_SEARCH_CRITERIA_BODY, NULL, match->expr, 0);
2299                         break;
2300
2301                 case MATCHCRITERIA_MESSAGE:
2302                         result = imap_search_new(IMAP_SEARCH_CRITERIA_MESSAGE, NULL, match->expr, 0);
2303                         break;
2304
2305                 case MATCHCRITERIA_HEADER:
2306                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, match->header, match->expr, 0);
2307                         break;
2308
2309                 case MATCHCRITERIA_SIZE_GREATER:
2310                         result = imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_GREATER, NULL, NULL, match->value);
2311                         break;
2312
2313                 case MATCHCRITERIA_SIZE_SMALLER:
2314                         result = imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_SMALLER, NULL, NULL, match->value);
2315                         break;
2316
2317                 default:
2318                         result = imap_search_new(IMAP_SEARCH_CRITERIA_ALL, NULL, NULL, 0);
2319                         if (is_all) {
2320                                 *is_all = TRUE;
2321                         }
2322                         break;
2323                 }
2324
2325                 if (invert) {
2326                         result = imap_search_not(result);
2327                         if (is_all && *is_all) {
2328                                 *is_all = FALSE;
2329                         }
2330                 }
2331
2332                 return result;
2333         }
2334
2335         return NULL;
2336 }
2337
2338 static void imap_change_search_charset(IMAPFolder *folder)
2339 {
2340         /* If server supports charset in searches, but the last used one failed,
2341          * changed to the next preferred charset. If none are still available,
2342          * disable charset searches.
2343          * Charsets are tried in the following order:
2344          * UTF-8, locale's charset, UTF-7.
2345          */
2346
2347         if (folder->search_charset_supported) {
2348                 if (folder->search_charset && !strcmp(folder->search_charset, conv_get_locale_charset_str_no_utf8()))
2349                         folder->search_charset = "UTF-8";
2350                 else if (folder->search_charset && !strcmp(folder->search_charset, "UTF-8"))
2351                         folder->search_charset = "UTF-7";
2352                 else {
2353                         folder->search_charset = NULL;
2354                         folder->search_charset_supported = FALSE;
2355                 }
2356         }
2357 }
2358
2359 static MatcherProp *imap_matcher_prop_set_charset(IMAPFolder *folder,
2360                                                   MatcherProp *utf8_prop,
2361                                                   gchar **charset)
2362 {
2363         /* If the match is going to be done locally, or the criteria is on
2364          * tag (special-cased to modified-UTF-7), or the expression searched
2365          * is ASCII, don't bother converting.
2366          */
2367         if (imap_matcher_type_is_local(utf8_prop->criteria)
2368          || utf8_prop->criteria == MATCHCRITERIA_TAG
2369          || utf8_prop->criteria == MATCHCRITERIA_NOT_TAG
2370          || utf8_prop->expr == NULL
2371          || is_ascii_str(utf8_prop->expr))
2372                 return matcherprop_new(utf8_prop->criteria,
2373                                utf8_prop->header,
2374                                utf8_prop->matchtype,
2375                                utf8_prop->expr,
2376                                utf8_prop->value);
2377         else {
2378                 gchar *conv_expr = NULL;
2379
2380                 /* If the search is server-side and the server doesn't support
2381                  * searching with the charsets we handle, bail out.
2382                  */
2383                 if (folder->search_charset_supported == FALSE)
2384                         return NULL;
2385
2386                 /* Else, convert. */
2387                 if (*charset == NULL)
2388                         *charset = g_strdup(folder->search_charset);
2389
2390                 conv_expr = conv_codeset_strdup(utf8_prop->expr, CS_UTF_8, *charset);
2391
2392                 if (conv_expr == NULL)
2393                         conv_expr = g_strdup(utf8_prop->expr);
2394
2395                 return matcherprop_new(utf8_prop->criteria,
2396                                utf8_prop->header,
2397                                utf8_prop->matchtype,
2398                                conv_expr,
2399                                utf8_prop->value);
2400         }
2401 }
2402
2403 static gint     search_msgs             (Folder                 *folder,
2404                                          FolderItem             *container,
2405                                          MsgNumberList          **msgs,
2406                                          gboolean               *on_server,
2407                                          MatcherList            *predicate,
2408                                          SearchProgressNotify   progress_cb,
2409                                          gpointer               progress_data)
2410 {
2411         IMAPSearchKey* key = NULL;
2412         GSList* cur;
2413         int result = -1;
2414         clist* uidlist = NULL;
2415         gboolean server_filtering_useless = FALSE;
2416         IMAPSession *session;
2417         gchar *charset_to_use = NULL;
2418
2419         if (on_server == NULL || !*on_server) {
2420                 return folder_item_search_msgs_local(folder, container, msgs, on_server,
2421                                 predicate, progress_cb, progress_data);
2422         }
2423
2424         for (cur = predicate->matchers; cur != NULL; cur = cur->next) {
2425                 IMAPSearchKey* matcherPart = NULL;
2426                 MatcherProp* prop = (MatcherProp*) cur->data;
2427                 gboolean is_all;
2428                 MatcherProp *imap_prop = imap_matcher_prop_set_charset(IMAP_FOLDER(folder), prop, &charset_to_use);
2429
2430                 if (imap_prop == NULL) {
2431                         /* Couldn't convert matcherprop to IMAP - probably not ascii
2432                          * and server doesn't support the charsets we do. */
2433                          return -1;
2434                 }
2435
2436                 matcherPart = search_make_key(imap_prop, &is_all);
2437
2438                 matcherprop_free(imap_prop);
2439
2440                 if (on_server) {
2441                         *on_server &= matcherPart != NULL && prop->matchtype == MATCHTYPE_MATCHCASE;
2442                 }
2443
2444                 if (matcherPart) {
2445                         if (key == NULL) {
2446                                 key = matcherPart;
2447                                 server_filtering_useless = is_all;
2448                         } else if (predicate->bool_and) {
2449                                 key = imap_search_and(key, matcherPart);
2450                                 server_filtering_useless &= is_all;
2451                         } else {
2452                                 key = imap_search_or(key, matcherPart);
2453                                 server_filtering_useless |= is_all;
2454                         }
2455                 }
2456         }
2457
2458         if (server_filtering_useless) {
2459                 imap_search_free(key);
2460                 key = NULL;
2461         }
2462
2463         if (key == NULL && progress_cb != NULL) {
2464                 GSList* cur;
2465                 GSList* list;
2466                 int count = 0;
2467
2468                 progress_cb(progress_data, TRUE, 0, 0, container->total_msgs);
2469                 progress_cb(progress_data, TRUE, container->total_msgs, 0, container->total_msgs);
2470
2471                 list = folder_item_get_msg_list(container);
2472                 for (cur = list; cur != NULL; cur = cur->next) {
2473                         *msgs = g_slist_prepend(*msgs, GUINT_TO_POINTER(((MsgInfo*) cur->data)->msgnum));
2474                         count++;
2475                 }
2476                 procmsg_msg_list_free(list);
2477
2478                 *msgs = g_slist_reverse(*msgs);
2479
2480                 return count;
2481         }
2482
2483         session = imap_session_get(folder);
2484         if (!session) {
2485                 return -1;
2486         }
2487         result = imap_select(session, IMAP_FOLDER(folder), FOLDER_ITEM(container),
2488                          NULL, NULL, NULL, NULL, NULL, TRUE);
2489         if (result != MAILIMAP_NO_ERROR)
2490                 return -1;
2491
2492         if (progress_cb)
2493                 progress_cb(progress_data, TRUE, 0, 0, container->total_msgs);
2494         result = imap_threaded_search(folder, IMAP_SEARCH_TYPE_KEYED, key, charset_to_use, NULL, &uidlist);
2495         if (progress_cb)
2496                 progress_cb(progress_data, TRUE, container->total_msgs, 0, container->total_msgs);
2497
2498         if (result == MAILIMAP_ERROR_PROTOCOL) {
2499                 debug_print("Server side search unavailable, using local search\n");
2500                 imap_handle_error(SESSION(session), NULL, result);
2501                 result = folder_item_search_msgs_local(folder, container, msgs, NULL,
2502                                                        predicate, progress_cb, progress_data);
2503                 if (result < 0) {
2504                         debug_print("search_msgs - got protocol error, aborting\n");
2505                         alertpanel_error_log(_("Search failed due to server error."));
2506                         return -1;
2507                 }
2508
2509                 return result;
2510         }
2511
2512         if (result == MAILIMAP_NO_ERROR) {
2513                 gint result = 0;
2514
2515                 *msgs = imap_uid_list_from_lep(uidlist, &result);
2516
2517                 mailimap_search_result_free(uidlist);
2518
2519                 if (charset_to_use != NULL)
2520                         g_free(charset_to_use);
2521
2522                 return result;
2523         } else if (charset_to_use != NULL) {
2524                 /* If search failed and was on an 8-bit string, try the next
2525                  * available charset to search if there still are some.
2526                  */
2527                 g_free(charset_to_use);
2528
2529                 imap_change_search_charset(IMAP_FOLDER(folder));
2530                 if (IMAP_FOLDER(folder)->search_charset_supported)
2531                         return search_msgs(folder, container, msgs, on_server, predicate,
2532                                    progress_cb, progress_data);
2533                 else {
2534                         imap_handle_error(SESSION(session), NULL, result);
2535                         return -1;
2536                 }
2537         } else {
2538                 imap_handle_error(SESSION(session), NULL, result);
2539                 return -1;
2540         }
2541 }
2542
2543
2544 static gint imap_do_remove_msgs(Folder *folder, FolderItem *dest,
2545                                 MsgInfoList *msglist, GHashTable *relation)
2546 {
2547         gchar *destdir, *dir;
2548         GSList *numlist = NULL, *cur;
2549         MsgInfo *msginfo;
2550         IMAPSession *session;
2551         gint ok = MAILIMAP_NO_ERROR;
2552
2553         g_return_val_if_fail(folder != NULL, -1);
2554         g_return_val_if_fail(dest != NULL, -1);
2555         g_return_val_if_fail(msglist != NULL, -1);
2556
2557         debug_print("getting session...\n");
2558         session = imap_session_get(folder);
2559         if (!session) {
2560                 return -1;
2561         }
2562
2563         lock_session(session); /* unlocked later in the function */
2564
2565         msginfo = (MsgInfo *)msglist->data;
2566
2567         ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
2568                          NULL, NULL, NULL, NULL, NULL, FALSE);
2569         if (ok != MAILIMAP_NO_ERROR) {
2570                 return ok;
2571         }
2572
2573         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
2574         if (is_fatal(ok)) {
2575                 g_free(destdir);
2576                 return ok;
2577         }
2578         for (cur = msglist; cur; cur = cur->next) {
2579                 msginfo = (MsgInfo *)cur->data;
2580                 if (!MSG_IS_DELETED(msginfo->flags))
2581                         numlist = g_slist_prepend(numlist, GINT_TO_POINTER(msginfo->msgnum));
2582         }
2583         numlist = g_slist_reverse(numlist);
2584
2585         if (numlist != NULL) {
2586                 ok = imap_set_message_flags
2587                         (session, IMAP_FOLDER_ITEM(msginfo->folder), numlist, IMAP_FLAG_DELETED, NULL, TRUE);
2588                 if (ok != MAILIMAP_NO_ERROR) {
2589                         log_warning(LOG_PROTOCOL, _("can't set deleted flags\n"));
2590                         g_free(destdir);
2591                         return ok;
2592                 }
2593         } /* else we just need to expunge */
2594         ok = imap_cmd_expunge(session);
2595         if (ok != MAILIMAP_NO_ERROR) {
2596                 log_warning(LOG_PROTOCOL, _("can't expunge\n"));
2597                 g_free(destdir);
2598                 return ok;
2599         }
2600
2601         session->folder_content_changed = TRUE;
2602         unlock_session(session);
2603
2604         dir = folder_item_get_path(msginfo->folder);
2605         if (is_dir_exist(dir)) {
2606                 for (cur = msglist; cur; cur = cur->next) {
2607                         msginfo = (MsgInfo *)cur->data;
2608                         remove_numbered_files(dir, msginfo->msgnum, msginfo->msgnum);
2609                 }
2610         }
2611         g_free(dir);
2612
2613         g_slist_free(numlist);
2614
2615         imap_scan_required(folder, dest);
2616
2617         g_free(destdir);
2618
2619         return 0;
2620 }
2621
2622 static gint imap_remove_msgs(Folder *folder, FolderItem *dest,
2623                     MsgInfoList *msglist, GHashTable *relation)
2624 {
2625         MsgInfo *msginfo;
2626
2627         g_return_val_if_fail(folder != NULL, -1);
2628         g_return_val_if_fail(dest != NULL, -1);
2629         if (msglist == NULL)
2630                 return 0;
2631
2632         msginfo = (MsgInfo *)msglist->data;
2633         g_return_val_if_fail(msginfo->folder != NULL, -1);
2634
2635         return imap_do_remove_msgs(folder, dest, msglist, relation);
2636 }
2637
2638 static gint imap_remove_all_msg(Folder *folder, FolderItem *item)
2639 {
2640         GSList *list = folder_item_get_msg_list(item);
2641         gint res = imap_remove_msgs(folder, item, list, NULL);
2642         procmsg_msg_list_free(list);
2643         return res;
2644 }
2645
2646 static gboolean imap_is_msg_changed(Folder *folder, FolderItem *item,
2647                                     MsgInfo *msginfo)
2648 {
2649         /* TODO: properly implement this method */
2650         return FALSE;
2651 }
2652
2653 static gint imap_close(Folder *folder, FolderItem *item)
2654 {
2655         return 0;
2656 }
2657
2658 static gint imap_scan_tree_real(Folder *folder, gboolean subs_only)
2659 {
2660         FolderItem *item = NULL;
2661         IMAPSession *session;
2662         gchar *root_folder = NULL;
2663
2664         g_return_val_if_fail(folder != NULL, -1);
2665         g_return_val_if_fail(folder->account != NULL, -1);
2666
2667         debug_print("getting session...\n");
2668         session = imap_session_get(folder);
2669         if (!session) {
2670                 if (!folder->node) {
2671                         folder_tree_destroy(folder);
2672                         item = folder_item_new(folder, folder->name, NULL);
2673                         item->folder = folder;
2674                         folder->node = item->node = g_node_new(item);
2675                 }
2676                 return -1;
2677         }
2678
2679         if (folder->account->imap_dir && *folder->account->imap_dir) {
2680                 gchar *real_path;
2681                 int r = MAILIMAP_NO_ERROR;
2682                 clist * lep_list;
2683
2684                 Xstrdup_a(root_folder, folder->account->imap_dir, {return -1;});
2685                 extract_quote(root_folder, '"');
2686                 subst_char(root_folder,
2687                            imap_get_path_separator(session, IMAP_FOLDER(folder),
2688                                                    root_folder, &r),
2689                            '/');
2690                 if (is_fatal(r))
2691                         return -1;
2692                 strtailchomp(root_folder, '/');
2693                 real_path = imap_get_real_path
2694                         (session, IMAP_FOLDER(folder), root_folder, &r);
2695                 if (is_fatal(r)) {
2696                         g_free(real_path);
2697                         return -1;
2698                 }
2699                 debug_print("IMAP root directory: %s\n", real_path);
2700
2701                 /* check if root directory exist */
2702
2703                 r = imap_threaded_list(session->folder, "", real_path,
2704                                        &lep_list);
2705
2706                 if (r != MAILIMAP_NO_ERROR)
2707                         imap_handle_error(SESSION(session), NULL, r);
2708
2709                 if ((r != MAILIMAP_NO_ERROR) || (clist_count(lep_list) == 0)) {
2710                         if (!folder->node) {
2711                                 item = folder_item_new(folder, folder->name, NULL);
2712                                 item->folder = folder;
2713                                 folder->node = item->node = g_node_new(item);
2714                         }
2715                         return -1;
2716                 }
2717                 mailimap_list_result_free(lep_list);
2718
2719                 g_free(real_path);
2720         }
2721
2722         if (folder->node)
2723                 item = FOLDER_ITEM(folder->node->data);
2724
2725         if (item && !item->path && root_folder) {
2726                 item->path = g_strdup(root_folder);
2727         }
2728
2729         if (!item || ((item->path || root_folder) &&
2730                       g_strcmp0(item->path, root_folder) != 0)) {
2731                 folder_tree_destroy(folder);
2732                 item = folder_item_new(folder, folder->name, root_folder);
2733                 item->folder = folder;
2734                 folder->node = item->node = g_node_new(item);
2735         }
2736
2737         imap_scan_tree_recursive(session, FOLDER_ITEM(folder->node->data), subs_only);
2738         imap_create_missing_folders(folder);
2739
2740         return 0;
2741 }
2742
2743 static gint imap_scan_tree(Folder *folder)
2744 {
2745         gboolean subs_only = FALSE;
2746         if (folder->account) {
2747                 debug_print(" scanning only subs %d\n", folder->account->imap_subsonly);
2748                 subs_only = folder->account->imap_subsonly;
2749         }
2750         return imap_scan_tree_real(folder, subs_only);
2751 }
2752
2753 static gint imap_scan_tree_recursive(IMAPSession *session, FolderItem *item, gboolean subs_only)
2754 {
2755         Folder *folder;
2756         IMAPFolder *imapfolder;
2757         FolderItem *new_item;
2758         GSList *item_list, *cur;
2759         GNode *node;
2760         gchar *real_path;
2761         gchar *wildcard_path;
2762         gchar separator;
2763         gchar wildcard[3];
2764         clist * lep_list;
2765         int r = MAILIMAP_NO_ERROR;
2766
2767         g_return_val_if_fail(item != NULL, -1);
2768         g_return_val_if_fail(item->folder != NULL, -1);
2769         g_return_val_if_fail(item->no_sub == FALSE, -1);
2770
2771         folder = item->folder;
2772         imapfolder = IMAP_FOLDER(folder);
2773
2774         separator = imap_get_path_separator(session, imapfolder, item->path, &r);
2775         if (is_fatal(r))
2776                 return r;
2777
2778         if (folder->ui_func)
2779                 folder->ui_func(folder, item, folder->ui_func_data);
2780
2781         if (item->path) {
2782                 wildcard[0] = separator;
2783                 wildcard[1] = '%';
2784                 wildcard[2] = '\0';
2785                 real_path = imap_get_real_path(session, imapfolder, item->path, &r);
2786                 if (is_fatal(r)) {
2787                         g_free(real_path);
2788                         return r;
2789                 }
2790         } else {
2791                 wildcard[0] = '%';
2792                 wildcard[1] = '\0';
2793                 real_path = g_strdup("");
2794         }
2795
2796         Xstrcat_a(wildcard_path, real_path, wildcard,
2797                   {g_free(real_path); return MAILIMAP_ERROR_BAD_STATE;});
2798         lep_list = NULL;
2799
2800         if (subs_only)
2801                 r = imap_threaded_lsub(folder, "", wildcard_path, &lep_list);
2802         else
2803                 r = imap_threaded_list(folder, "", wildcard_path, &lep_list);
2804
2805         if (r != MAILIMAP_NO_ERROR) {
2806                 imap_handle_error(SESSION(session), NULL, r);
2807                 item_list = NULL;
2808                 g_free(real_path);
2809                 return r;
2810         }
2811         else {
2812                 item_list = imap_list_from_lep(imapfolder,
2813                                                lep_list, real_path, FALSE);
2814                 mailimap_list_result_free(lep_list);
2815         }
2816
2817         g_free(real_path);
2818
2819         node = item->node->children;
2820         while (node != NULL) {
2821                 FolderItem *old_item = FOLDER_ITEM(node->data);
2822                 GNode *next = node->next;
2823
2824                 new_item = NULL;
2825                 for (cur = item_list; cur != NULL; cur = cur->next) {
2826                         FolderItem *cur_item = FOLDER_ITEM(cur->data);
2827                         if (!g_strcmp0(old_item->path, cur_item->path)) {
2828                                 new_item = cur_item;
2829                                 break;
2830                         }
2831                 }
2832                 if (!new_item) {
2833                         if (old_item && old_item->path && !strcasecmp(old_item->path, "INBOX")) {
2834                                 debug_print("not removing INBOX\n");
2835                         } else {
2836                                 debug_print("folder '%s' not found. removing...\n",
2837                                             old_item->path);
2838                                 folder_item_remove(old_item);
2839                         }
2840                 } else {
2841                         old_item->no_sub = new_item->no_sub;
2842                         old_item->no_select = new_item->no_select;
2843                         if (old_item->no_sub == TRUE && node->children) {
2844                                 debug_print("folder '%s' doesn't have "
2845                                             "subfolders. removing...\n",
2846                                             old_item->path);
2847                                 folder_item_remove_children(old_item);
2848                         }
2849                 }
2850
2851                 node = next;
2852         }
2853
2854         for (cur = item_list; cur != NULL; cur = cur->next) {
2855                 FolderItem *cur_item = FOLDER_ITEM(cur->data);
2856                 new_item = NULL;
2857
2858                 for (node = item->node->children; node != NULL;
2859                      node = node->next) {
2860                         if (!g_strcmp0(FOLDER_ITEM(node->data)->path,
2861                                      cur_item->path)) {
2862                                 new_item = FOLDER_ITEM(node->data);
2863                                 folder_item_destroy(cur_item);
2864                                 cur_item = NULL;
2865                                 break;
2866                         }
2867                 }
2868                 if (!new_item) {
2869                         new_item = cur_item;
2870                         debug_print("new folder '%s' found.\n", new_item->path);
2871                         folder_item_append(item, new_item);
2872                 }
2873
2874                 if (!strcasecmp(new_item->path, "INBOX")) {
2875                         new_item->stype = F_INBOX;
2876                         folder->inbox = new_item;
2877                 } else if (!folder_item_parent(item) || item->stype == F_INBOX) {
2878                         gchar *base;
2879
2880                         base = g_path_get_basename(new_item->path);
2881
2882                         if (!folder->outbox && !g_ascii_strcasecmp(base, "Sent")) {
2883                                 new_item->stype = F_OUTBOX;
2884                                 folder->outbox = new_item;
2885                         } else if (!folder->draft && (!g_ascii_strcasecmp(base, "Drafts") || !g_ascii_strcasecmp(base, "Draft"))) {
2886                                 new_item->stype = F_DRAFT;
2887                                 folder->draft = new_item;
2888                         } else if (!folder->queue && !g_ascii_strcasecmp(base, "Queue")) {
2889                                 new_item->stype = F_QUEUE;
2890                                 folder->queue = new_item;
2891                         } else if (!folder->trash && !g_ascii_strcasecmp(base, "Trash")) {
2892                                 new_item->stype = F_TRASH;
2893                                 folder->trash = new_item;
2894                         }
2895                         g_free(base);
2896                 }
2897
2898                 if (new_item->no_sub == FALSE)
2899                         imap_scan_tree_recursive(session, new_item, subs_only);
2900         }
2901
2902         g_slist_free(item_list);
2903
2904         return MAILIMAP_NO_ERROR;
2905 }
2906
2907 GList *imap_scan_subtree(Folder *folder, FolderItem *item, gboolean unsubs_only, gboolean recursive)
2908 {
2909         IMAPSession *session = imap_session_get(folder);
2910         gchar *real_path;
2911         gchar *wildcard_path;
2912         gchar separator;
2913         gchar wildcard[3];
2914         clist * lep_list;
2915         GSList *item_list = NULL, *cur;
2916         GList *child_list = NULL, *tmplist = NULL;
2917         GSList *sub_list = NULL;
2918         int r = MAILIMAP_NO_ERROR;
2919
2920         if (!session)
2921                 return NULL;
2922
2923         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &r);
2924         if (is_fatal(r))
2925                 return NULL;
2926
2927         if (item->path) {
2928                 wildcard[0] = separator;
2929                 wildcard[1] = '%';
2930                 wildcard[2] = '\0';
2931                 real_path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &r);
2932                 if (is_fatal(r)) {
2933                         g_free(real_path);
2934                         return NULL;
2935                 }
2936         } else {
2937                 wildcard[0] = '%';
2938                 wildcard[1] = '\0';
2939                 real_path = g_strdup("");
2940         }
2941
2942         Xstrcat_a(wildcard_path, real_path, wildcard,
2943                   {g_free(real_path); return NULL;});
2944         lep_list = NULL;
2945
2946         if (unsubs_only)
2947                 statusbar_print_all(_("Looking for unsubscribed folders in %s..."),
2948                                 item->path?item->path:item->name);
2949         else
2950                 statusbar_print_all(_("Looking for subfolders of %s..."),
2951                                 item->path?item->path:item->name);
2952
2953         r = imap_threaded_list(folder, "", wildcard_path, &lep_list);
2954         if (r) {
2955                 g_free(real_path);
2956                 statusbar_pop_all();
2957                 return NULL;
2958         }
2959         item_list = imap_list_from_lep(IMAP_FOLDER(folder),
2960                                lep_list, real_path, FALSE);
2961         mailimap_list_result_free(lep_list);
2962
2963         for (cur = item_list; cur != NULL; cur = cur->next) {
2964                 FolderItem *cur_item = FOLDER_ITEM(cur->data);
2965                 if (recursive) {
2966                         tmplist = imap_scan_subtree(folder, cur_item,
2967                                         unsubs_only, recursive);
2968                         if (tmplist)
2969                                 child_list = g_list_concat(child_list, tmplist);
2970                 }
2971                 child_list = g_list_prepend(child_list,
2972                                 imap_get_real_path(session,
2973                                         IMAP_FOLDER(folder), cur_item->path, &r));
2974                 if (is_fatal(r)) {
2975                         g_free(real_path);
2976                         statusbar_pop_all();
2977                         return NULL;
2978                 }
2979                 folder_item_destroy(cur_item);
2980         }
2981         child_list = g_list_reverse(child_list);
2982         g_slist_free(item_list);
2983
2984         if (unsubs_only) {
2985                 r = imap_threaded_lsub(folder, "", wildcard_path, &lep_list);
2986                 if (r) {
2987                         g_free(real_path);
2988                         statusbar_pop_all();
2989                         return NULL;
2990                 }
2991                 sub_list = imap_list_from_lep(IMAP_FOLDER(folder),
2992                                        lep_list, real_path, FALSE);
2993                 mailimap_list_result_free(lep_list);
2994
2995                 for (cur = sub_list; cur != NULL; cur = cur->next) {
2996                         FolderItem *cur_item = FOLDER_ITEM(cur->data);
2997                         GList *oldlitem = NULL;
2998                         gchar *tmp = imap_get_real_path(session,
2999                                         IMAP_FOLDER(folder), cur_item->path, &r);
3000                         if (r) {
3001                                 g_free(real_path);
3002                                 statusbar_pop_all();
3003                                 g_free(tmp);
3004                                 return NULL;
3005                         }
3006                         folder_item_destroy(cur_item);
3007                         oldlitem = g_list_find_custom(
3008                                         child_list, tmp, (GCompareFunc)g_strcmp0);
3009                         if (oldlitem) {
3010                                 child_list = g_list_remove_link(child_list, oldlitem);
3011                                 g_free(oldlitem->data);
3012                                 g_list_free(oldlitem);
3013                         }
3014                         g_free(tmp);
3015                 }
3016         }
3017
3018         g_free(real_path);
3019         statusbar_pop_all();
3020
3021         return child_list;
3022 }
3023
3024 static gint imap_create_tree(Folder *folder)
3025 {
3026         g_return_val_if_fail(folder != NULL, -1);
3027         g_return_val_if_fail(folder->node != NULL, -1);
3028         g_return_val_if_fail(folder->node->data != NULL, -1);
3029         g_return_val_if_fail(folder->account != NULL, -1);
3030
3031         imap_scan_tree(folder);
3032         imap_create_missing_folders(folder);
3033
3034         return 0;
3035 }
3036
3037 static void imap_create_missing_folders(Folder *folder)
3038 {
3039         g_return_if_fail(folder != NULL);
3040
3041         if (!folder->inbox)
3042                 folder->inbox = imap_create_special_folder
3043                         (folder, F_INBOX, "INBOX");
3044         if (!folder->trash)
3045                 folder->trash = imap_create_special_folder
3046                         (folder, F_TRASH, "Trash");
3047         if (!folder->queue)
3048                 folder->queue = imap_create_special_folder
3049                         (folder, F_QUEUE, "Queue");
3050         if (!folder->outbox)
3051                 folder->outbox = imap_create_special_folder
3052                         (folder, F_OUTBOX, "Sent");
3053         if (!folder->draft)
3054                 folder->draft = imap_create_special_folder
3055                         (folder, F_DRAFT, "Drafts");
3056 }
3057
3058 static FolderItem *imap_create_special_folder(Folder *folder,
3059                                               SpecialFolderItemType stype,
3060                                               const gchar *name)
3061 {
3062         FolderItem *item;
3063         FolderItem *new_item;
3064
3065         g_return_val_if_fail(folder != NULL, NULL);
3066         g_return_val_if_fail(folder->node != NULL, NULL);
3067         g_return_val_if_fail(folder->node->data != NULL, NULL);
3068         g_return_val_if_fail(folder->account != NULL, NULL);
3069         g_return_val_if_fail(name != NULL, NULL);
3070
3071         item = FOLDER_ITEM(folder->node->data);
3072         new_item = imap_create_folder(folder, item, name);
3073
3074         if (!new_item) {
3075                 g_warning("Can't create '%s'", name);
3076                 if (!folder->inbox) return NULL;
3077
3078                 new_item = imap_create_folder(folder, folder->inbox, name);
3079                 if (!new_item)
3080                         g_warning("Can't create '%s' under INBOX", name);
3081                 else
3082                         new_item->stype = stype;
3083         } else
3084                 new_item->stype = stype;
3085
3086         return new_item;
3087 }
3088
3089 #ifdef G_OS_WIN32
3090 static gchar *imap_encode_unsafe_chars(const gchar *str)
3091 {
3092         gchar *ret = NULL, *o_ret;
3093         gchar *i;
3094         if (!str)
3095                 return NULL;
3096         ret = g_malloc(3*strlen(str)+1);
3097         o_ret = ret;
3098         for (i = (gchar *)str; *i; i++) {
3099                 switch(*i) {
3100                         case ':':
3101                         case '|':
3102                         case '<':
3103                         case '>':
3104                         case '*':
3105                         case '?':
3106                         case '#':
3107                                 *ret++ = '%';
3108                                 *ret++ = '0'+(*i/10);
3109                                 *ret++ = '0'+(*i%10);
3110                                 break;
3111                         default:
3112                                 *ret++ = *i;
3113                 }
3114         }
3115         *ret++ = '\0';
3116         return o_ret;
3117 }
3118 #endif
3119 static gchar *imap_item_get_path(Folder *folder, FolderItem *item)
3120 {
3121         gchar *folder_path, *path;
3122         gchar *item_path = NULL;
3123
3124         g_return_val_if_fail(folder != NULL, NULL);
3125         g_return_val_if_fail(folder->account != NULL, NULL);
3126         g_return_val_if_fail(item != NULL, NULL);
3127         folder_path = prefs_account_cache_dir(folder->account, FALSE);
3128
3129         g_return_val_if_fail(folder_path != NULL, NULL);
3130
3131 #ifdef G_OS_UNIX
3132         item_path = g_strdup(item->path);
3133 #else
3134         item_path = imap_encode_unsafe_chars(item->path);
3135 #endif
3136
3137         if (g_path_is_absolute(folder_path)) {
3138                 if (item_path)
3139                         path = g_strconcat(folder_path, G_DIR_SEPARATOR_S,
3140                                            item_path, NULL);
3141                 else
3142                         path = g_strdup(folder_path);
3143         } else {
3144                 if (item_path)
3145                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
3146                                            folder_path, G_DIR_SEPARATOR_S,
3147                                            item_path, NULL);
3148                 else
3149                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
3150                                            folder_path, NULL);
3151         }
3152         g_free(folder_path);
3153         g_free(item_path);
3154 #ifdef G_OS_WIN32
3155         while (strchr(path, '/'))
3156                 *strchr(path, '/') = '\\';
3157 #endif
3158
3159         return path;
3160 }
3161
3162 static FolderItem *imap_create_folder(Folder *folder, FolderItem *parent,
3163                                const gchar *name)
3164 {
3165         gchar *dirpath, *imap_path;
3166         IMAPSession *session;
3167         FolderItem *new_item;
3168         gchar separator;
3169         gchar *new_name;
3170         const gchar *p;
3171         gint ok = MAILIMAP_NO_ERROR;
3172         gboolean no_select = FALSE, no_sub = FALSE;
3173         gboolean exist = FALSE;
3174
3175         g_return_val_if_fail(folder != NULL, NULL);
3176         g_return_val_if_fail(folder->account != NULL, NULL);
3177         g_return_val_if_fail(parent != NULL, NULL);
3178         g_return_val_if_fail(name != NULL, NULL);
3179
3180         if (to_number(name) > 0) {
3181                 gchar *cached_msg = imap_get_cached_filename(parent, to_number(name));
3182                 if (is_file_exist(cached_msg)) {
3183                         if (claws_unlink(cached_msg) != 0) {
3184                                 return NULL;
3185                         }
3186                 }
3187         }
3188
3189         debug_print("getting session...\n");
3190         session = imap_session_get(folder);
3191         if (!session) {
3192                 return NULL;
3193         }
3194
3195         if (!folder_item_parent(parent) && strcasecmp(name, "INBOX") == 0) {
3196                 dirpath = g_strdup(name);
3197         }else if (parent->path)
3198                 dirpath = g_strconcat(parent->path, "/", name, NULL);
3199         else if ((p = strchr(name, '/')) != NULL && *(p + 1) != '\0')
3200                 dirpath = g_strdup(name);
3201         else if (folder->account->imap_dir && *folder->account->imap_dir) {
3202                 gchar *imap_dir;
3203
3204                 Xstrdup_a(imap_dir, folder->account->imap_dir, {return NULL;});
3205                 strtailchomp(imap_dir, '/');
3206                 dirpath = g_strconcat(imap_dir, "/", name, NULL);
3207         } else
3208                 dirpath = g_strdup(name);
3209
3210
3211
3212         /* keep trailing directory separator to create a folder that contains
3213            sub folder */
3214         imap_path = imap_utf8_to_modified_utf7(dirpath, FALSE);
3215
3216         strtailchomp(dirpath, '/');
3217         Xstrdup_a(new_name, name, {
3218                 g_free(dirpath);
3219                 g_free(imap_path);
3220                 return NULL;});
3221
3222         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), imap_path, &ok);
3223         if (is_fatal(ok)) {
3224                 g_free(imap_path);
3225                 return NULL;
3226         }
3227         imap_path_separator_subst(imap_path, separator);
3228         /* remove trailing / for display */
3229         strtailchomp(new_name, '/');
3230
3231         if (strcasecmp(dirpath, "INBOX") != 0) {
3232                 int r;
3233                 clist * lep_list;
3234
3235                 r = imap_threaded_list(folder, "", imap_path, &lep_list);
3236                 if (r != MAILIMAP_NO_ERROR) {
3237                         imap_handle_error(SESSION(session), NULL, r);
3238                         log_warning(LOG_PROTOCOL, _("can't create mailbox: LIST failed\n"));
3239                         g_free(imap_path);
3240                         g_free(dirpath);
3241                         return NULL;
3242                 }
3243
3244                 if (clist_count(lep_list) > 0)
3245                         exist = TRUE;
3246                 mailimap_list_result_free(lep_list);
3247                 lep_list = NULL;
3248                 if (!exist) {
3249                         ok = imap_cmd_create(session, imap_path);
3250                         if (ok != MAILIMAP_NO_ERROR) {
3251                                 log_warning(LOG_PROTOCOL, _("can't create mailbox\n"));
3252                                 g_free(imap_path);
3253                                 g_free(dirpath);
3254                                 return NULL;
3255                         }
3256                         r = imap_threaded_list(folder, "", imap_path, &lep_list);
3257                         if (r == MAILIMAP_NO_ERROR) {
3258                                 GSList *item_list = imap_list_from_lep(IMAP_FOLDER(folder),
3259                                                lep_list, dirpath, TRUE);
3260                                 if (item_list) {
3261                                         FolderItem *cur_item = FOLDER_ITEM(item_list->data);
3262                                         no_select = cur_item->no_select;
3263                                         no_sub = cur_item->no_sub;
3264                                         g_slist_free(item_list);
3265                                 }
3266                                 mailimap_list_result_free(lep_list);
3267                         } else {
3268                                 imap_handle_error(SESSION(session), NULL, r);
3269                         }
3270                 }
3271                 imap_threaded_subscribe(folder, imap_path, TRUE);
3272         } else {
3273                 clist *lep_list;
3274                 int r;
3275                 /* just get flags */
3276                 r = imap_threaded_list(folder, "", "INBOX", &lep_list);
3277                 if (r == MAILIMAP_NO_ERROR) {
3278                         GSList *item_list = imap_list_from_lep(IMAP_FOLDER(folder),
3279                                        lep_list, dirpath, TRUE);
3280                         if (item_list) {
3281                                 FolderItem *cur_item = FOLDER_ITEM(item_list->data);
3282                                 no_select = cur_item->no_select;
3283                                 no_sub = cur_item->no_sub;
3284                                 g_slist_free(item_list);
3285                         }
3286                         mailimap_list_result_free(lep_list);
3287                 } else {
3288                         imap_handle_error(SESSION(session), NULL, r);
3289                 }
3290         }
3291
3292         new_item = folder_item_new(folder, new_name, dirpath);
3293         new_item->no_select = no_select;
3294         new_item->no_sub = no_sub;
3295         folder_item_append(parent, new_item);
3296         g_free(imap_path);
3297         g_free(dirpath);
3298
3299         dirpath = folder_item_get_path(new_item);
3300         if (!is_dir_exist(dirpath))
3301                 make_dir_hier(dirpath);
3302         g_free(dirpath);
3303
3304         if (exist) {
3305                 /* folder existed, scan it */
3306                 imap_scan_required(folder, new_item);
3307                 folder_item_scan_full(new_item, FALSE);
3308         }
3309
3310         return new_item;
3311 }
3312
3313 static gint imap_rename_folder(Folder *folder, FolderItem *item,
3314                                const gchar *name)
3315 {
3316         gchar *dirpath;
3317         gchar *newpath;
3318         gchar *real_oldpath;
3319         gchar *real_newpath;
3320         gchar *paths[2];
3321         gchar *old_cache_dir;
3322         gchar *new_cache_dir;
3323         IMAPSession *session;
3324         gchar separator;
3325         gint ok = MAILIMAP_NO_ERROR;
3326         gint exists, recent, unseen;
3327         guint32 uid_validity;
3328
3329         g_return_val_if_fail(folder != NULL, -1);
3330         g_return_val_if_fail(item != NULL, -1);
3331         g_return_val_if_fail(item->path != NULL, -1);
3332         g_return_val_if_fail(name != NULL, -1);
3333
3334         debug_print("getting session...\n");
3335         session = imap_session_get(folder);
3336         if (!session) {
3337                 return -1;
3338         }
3339
3340         if (strchr(name, imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &ok)) != NULL ||
3341                 is_fatal(ok)) {
3342                 g_warning("New folder name must not contain the namespace "
3343                             "path separator");
3344                 return -1;
3345         }
3346
3347         real_oldpath = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &ok);
3348         if (is_fatal(ok)) {
3349                 g_free(real_oldpath);
3350                 return -1;
3351         }
3352
3353         g_free(session->mbox);
3354         session->mbox = NULL;
3355         session->exists = 0;
3356         session->recent = 0;
3357         session->expunge = 0;
3358         ok = imap_cmd_examine(session, "INBOX",
3359                               &exists, &recent, &unseen, &uid_validity, FALSE);
3360         if (ok != MAILIMAP_NO_ERROR) {
3361                 g_free(real_oldpath);
3362                 return -1;
3363         }
3364
3365         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &ok);
3366         if (is_fatal(ok)) {
3367                 g_free(real_oldpath);
3368                 return -1;
3369         }
3370         if (strchr(item->path, '/')) {
3371                 dirpath = g_path_get_dirname(item->path);
3372                 newpath = g_strconcat(dirpath, "/", name, NULL);
3373                 g_free(dirpath);
3374         } else
3375                 newpath = g_strdup(name);
3376
3377         real_newpath = imap_utf8_to_modified_utf7(newpath, FALSE);
3378         imap_path_separator_subst(real_newpath, separator);
3379
3380         ok = imap_cmd_rename(session, real_oldpath, real_newpath);
3381         if (ok != MAILIMAP_NO_ERROR) {
3382                 log_warning(LOG_PROTOCOL, _("can't rename mailbox: %s to %s\n"),
3383                             real_oldpath, real_newpath);
3384                 g_free(real_oldpath);
3385                 g_free(newpath);
3386                 g_free(real_newpath);
3387                 return -1;
3388         }
3389         g_free(item->name);
3390         item->name = g_strdup(name);
3391
3392         old_cache_dir = folder_item_get_path(item);
3393
3394         paths[0] = g_strdup(item->path);
3395         paths[1] = newpath;
3396         g_node_traverse(item->node, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
3397                         imap_rename_folder_func, paths);
3398
3399         if (is_dir_exist(old_cache_dir)) {
3400                 new_cache_dir = folder_item_get_path(item);
3401                 if (g_rename(old_cache_dir, new_cache_dir) < 0) {
3402                         FILE_OP_ERROR(old_cache_dir, "rename");
3403                 }
3404                 g_free(new_cache_dir);
3405         }
3406
3407         g_free(old_cache_dir);
3408         g_free(paths[0]);
3409         g_free(newpath);
3410         g_free(real_oldpath);
3411         g_free(real_newpath);
3412         return 0;
3413 }
3414
3415 gint imap_subscribe(Folder *folder, FolderItem *item, gchar *rpath, gboolean sub)
3416 {
3417         gchar *path;
3418         gint r = MAILIMAP_NO_ERROR;
3419         IMAPSession *session;
3420         debug_print("getting session...\n");
3421
3422         session = imap_session_get(folder);
3423         if (!session) {
3424                 return -1;
3425         }
3426         if (item && item->path) {
3427                 path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &r);
3428                 if (!path)
3429                         return -1;
3430                 if (is_fatal(r)) {
3431                         g_free(path);
3432                         return -1;
3433                 }
3434                 if (!strcasecmp(path, "INBOX") && sub == FALSE) {
3435                         g_free(path);
3436                         return -1;
3437                 }
3438                 debug_print("%ssubscribing %s\n", sub?"":"un", path);
3439                 r = imap_threaded_subscribe(folder, path, sub);
3440                 g_free(path);
3441         } else if (rpath) {
3442                 r = imap_threaded_subscribe(folder, rpath, sub);
3443         } else
3444                 return -1;
3445         return r;
3446 }
3447
3448 static gint imap_remove_folder_real(Folder *folder, FolderItem *item)
3449 {
3450         gint ok = MAILIMAP_NO_ERROR;
3451         IMAPSession *session;
3452         gchar *path;
3453         gchar *cache_dir;
3454         gboolean selected_folder;
3455
3456         g_return_val_if_fail(folder != NULL, -1);
3457         g_return_val_if_fail(item != NULL, -1);
3458         g_return_val_if_fail(item->path != NULL, -1);
3459
3460         debug_print("getting session...\n");
3461         session = imap_session_get(folder);
3462         if (!session) {
3463                 return -1;
3464         }
3465         path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &ok);
3466         if (is_fatal(ok)) {
3467                 g_free(path);
3468                 return -1;
3469         }
3470         imap_threaded_subscribe(folder, path, FALSE);
3471
3472         selected_folder = (session->mbox != NULL) &&
3473                           (!strcmp(session->mbox, item->path));
3474         if (selected_folder) {
3475                 ok = imap_cmd_close(session);
3476                 if (ok != MAILIMAP_NO_ERROR) {
3477                         debug_print("close err %d\n", ok);
3478                         return ok;
3479                 }
3480         }
3481         ok = imap_cmd_delete(session, path);
3482         if (ok != MAILIMAP_NO_ERROR && !is_fatal(ok)) {
3483                 gchar *tmp = NULL;
3484
3485                 ok = MAILIMAP_NO_ERROR;
3486                 tmp = g_strdup_printf("%s%c", path,
3487                                 imap_get_path_separator(session, IMAP_FOLDER(folder), path, &ok));
3488                 g_free(path);
3489                 path = tmp;
3490                 if (!is_fatal(ok))
3491                         ok = imap_cmd_delete(session, path);
3492         }
3493
3494         if (ok != MAILIMAP_NO_ERROR) {
3495                 log_warning(LOG_PROTOCOL, _("can't delete mailbox\n"));
3496                 g_free(path);
3497                 return -1;
3498         }
3499
3500         g_free(path);
3501         cache_dir = folder_item_get_path(item);
3502         if (is_dir_exist(cache_dir) && remove_dir_recursive(cache_dir) < 0)
3503                 g_warning("can't remove directory '%s'", cache_dir);
3504         g_free(cache_dir);
3505         folder_item_remove(item);
3506         return 0;
3507 }
3508
3509 static gint imap_remove_folder(Folder *folder, FolderItem *item)
3510 {
3511         GNode *node, *next;
3512
3513         g_return_val_if_fail(item != NULL, -1);
3514         g_return_val_if_fail(item->folder != NULL, -1);
3515         g_return_val_if_fail(item->node != NULL, -1);
3516
3517         node = item->node->children;
3518         while (node != NULL) {
3519                 next = node->next;
3520                 if (imap_remove_folder(folder, FOLDER_ITEM(node->data)) < 0)
3521                         return -1;
3522                 node = next;
3523         }
3524         debug_print("IMAP removing %s\n", item->path);
3525
3526         if (imap_remove_all_msg(folder, item) < 0)
3527                 return -1;
3528         return imap_remove_folder_real(folder, item);
3529 }
3530
3531 typedef struct _uncached_data {
3532         IMAPSession *session;
3533         FolderItem *item;
3534         MsgNumberList *numlist;
3535         guint cur;
3536         guint total;
3537         gboolean done;
3538         int ok;
3539 } uncached_data;
3540
3541 static void *imap_get_uncached_messages_thread(void *data)
3542 {
3543         uncached_data *stuff = (uncached_data *)data;
3544         IMAPSession *session = stuff->session;
3545         FolderItem *item = stuff->item;
3546         MsgNumberList *numlist = stuff->numlist;
3547         GSList *newlist = NULL;
3548         GSList *llast = NULL;
3549         GSList *seq_list, *cur;
3550         gboolean got_alien_tags = FALSE;
3551
3552         debug_print("uncached_messages\n");
3553
3554         if (session == NULL || item == NULL || item->folder == NULL
3555             || FOLDER_CLASS(item->folder) != &imap_class) {
3556                 stuff->done = TRUE;
3557                 return NULL;
3558         }
3559
3560         seq_list = imap_get_lep_set_from_numlist(IMAP_FOLDER(item->folder), numlist);
3561         debug_print("get msgs info\n");
3562         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
3563                 struct mailimap_set * imapset;
3564                 unsigned int i;
3565                 int r;
3566                 carray * env_list;
3567                 int count;
3568
3569                 if (session->cancelled)
3570                         break;
3571
3572                 imapset = cur->data;
3573
3574                 r = imap_threaded_fetch_env(session->folder,
3575                                             imapset, &env_list);
3576                 if (r != MAILIMAP_NO_ERROR) {
3577                         imap_handle_error(SESSION(session), NULL, r);
3578                         if (is_fatal(r)) {
3579                                 stuff->ok = r;
3580                                 return NULL;
3581                         }
3582                         continue;
3583                 }
3584
3585                 session_set_access_time(SESSION(session));
3586
3587                 count = 0;
3588                 for(i = 0 ; i < carray_count(env_list) ; i += 2) {
3589                         struct imap_fetch_env_info * info;
3590                         MsgInfo * msginfo;
3591                         GSList *tags = NULL, *cur = NULL;
3592                         info = carray_get(env_list, i);
3593                         tags = carray_get(env_list, i+1);
3594                         msginfo = imap_envelope_from_lep(info, item);
3595                         if (msginfo == NULL) {
3596                                 slist_free_strings_full(tags);
3597                                 continue;
3598                         }
3599                         g_slist_free(msginfo->tags);
3600                         msginfo->tags = NULL;
3601
3602                         for (cur = tags; cur; cur = cur->next) {
3603                                 gchar *real_tag = imap_modified_utf7_to_utf8(cur->data, TRUE);
3604                                 gint id = 0;
3605                                 id = tags_get_id_for_str(real_tag);
3606                                 if (id == -1) {
3607                                         id = tags_add_tag(real_tag);
3608                                         got_alien_tags = TRUE;
3609                                 }
3610                                 if (!g_slist_find(msginfo->tags, GINT_TO_POINTER(id))) {
3611                                         msginfo->tags = g_slist_prepend(
3612                                                         msginfo->tags,
3613                                                         GINT_TO_POINTER(id));
3614                                 }
3615                                 g_free(real_tag);
3616                         }
3617                         if (msginfo->tags)
3618                                 msginfo->tags = g_slist_reverse(msginfo->tags);
3619                         slist_free_strings_full(tags);
3620                         msginfo->folder = item;
3621                         if (!newlist)
3622                                 llast = newlist = g_slist_append(newlist, msginfo);
3623                         else {
3624                                 llast = g_slist_append(llast, msginfo);
3625                                 llast = llast->next;
3626                         }
3627                         count ++;
3628                 }
3629
3630                 imap_fetch_env_free(env_list);
3631         }
3632
3633         if (got_alien_tags) {
3634                 tags_write_tags();
3635                 main_window_reflect_tags_changes(mainwindow_get_mainwindow());
3636         }
3637
3638         imap_lep_set_free(seq_list);
3639
3640         session_set_access_time(SESSION(session));
3641         stuff->done = TRUE;
3642         return newlist;
3643 }
3644
3645 #define MAX_MSG_NUM 50
3646
3647 static GSList *imap_get_uncached_messages(IMAPSession *session,
3648                                         FolderItem *item,
3649                                         MsgNumberList *numlist,
3650                                         int *r)
3651 {
3652         GSList *result = NULL;
3653         GSList * cur;
3654         uncached_data *data = g_new0(uncached_data, 1);
3655
3656         cur = numlist;
3657         data->total = g_slist_length(numlist);
3658         data->ok = MAILIMAP_NO_ERROR;
3659         debug_print("messages list : %i\n", data->total);
3660
3661         while (cur != NULL) {
3662                 GSList * partial_result;
3663                 int count;
3664                 GSList * newlist;
3665                 GSList * llast;
3666
3667                 llast = NULL;
3668                 count = 0;
3669                 newlist = NULL;
3670                 while (count < MAX_MSG_NUM) {
3671                         void * p;
3672
3673                         p = cur->data;
3674
3675                         if (newlist == NULL)
3676                                 llast = newlist = g_slist_append(newlist, p);
3677                         else {
3678                                 llast = g_slist_append(llast, p);
3679                                 llast = llast->next;
3680                         }
3681                         count ++;
3682
3683                         cur = cur->next;
3684                         if (cur == NULL)
3685                                 break;
3686                 }
3687
3688                 data->done = FALSE;
3689                 data->session = session;
3690                 data->item = item;
3691                 data->numlist = newlist;
3692                 data->cur += count;
3693
3694                 if (prefs_common.work_offline &&
3695                     !inc_offline_should_override(FALSE,
3696                         _("Claws Mail needs network access in order "
3697                           "to access the IMAP server."))) {
3698                         g_free(data);
3699                         return NULL;
3700                 }
3701
3702                 partial_result =
3703                         (GSList *)imap_get_uncached_messages_thread(data);
3704                 *r = data->ok;
3705                 if (data->ok != MAILIMAP_NO_ERROR) {
3706                         goto bail;
3707                 }
3708                 statusbar_progress_all(data->cur,data->total, 1);
3709
3710                 g_slist_free(newlist);
3711
3712                 result = g_slist_concat(result, partial_result);
3713         }
3714 bail:
3715         g_free(data);
3716
3717         statusbar_progress_all(0,0,0);
3718         statusbar_pop_all();
3719
3720         return result;
3721 }
3722
3723 static void imap_delete_all_cached_messages(FolderItem *item)
3724 {
3725         gchar *dir;
3726
3727         g_return_if_fail(item != NULL);
3728         g_return_if_fail(item->folder != NULL);
3729         g_return_if_fail(FOLDER_CLASS(item->folder) == &imap_class);
3730
3731         debug_print("Deleting all cached messages...\n");
3732
3733         dir = folder_item_get_path(item);
3734         if (is_dir_exist(dir))
3735                 remove_all_numbered_files(dir);
3736         g_free(dir);
3737
3738         debug_print("Deleting all cached messages done.\n");
3739 }
3740
3741 gchar imap_get_path_separator_for_item(FolderItem *item)
3742 {
3743         Folder *folder = NULL;
3744         IMAPFolder *imap_folder = NULL;
3745         IMAPSession *session = NULL;
3746         gchar result = '/';
3747         gint ok = MAILIMAP_NO_ERROR;
3748         if (!item)
3749                 return '/';
3750         folder = item->folder;
3751
3752         if (!folder)
3753                 return '/';
3754
3755         imap_folder = IMAP_FOLDER(folder);
3756
3757         debug_print("getting session...\n");
3758         session = imap_session_get(FOLDER(folder));
3759         result = imap_get_path_separator(session, imap_folder, item->path, &ok);
3760         return result;
3761 }
3762
3763 static gchar imap_refresh_path_separator(IMAPSession *session, IMAPFolder *folder, const gchar *subfolder, gint *ok)
3764 {
3765         clist * lep_list;
3766         int r;
3767         gchar separator = '\0';
3768
3769         g_return_val_if_fail(session != NULL, '/');
3770         r = imap_threaded_list((Folder *)folder, "", subfolder, &lep_list);
3771
3772         if (r != MAILIMAP_NO_ERROR) {
3773                 imap_handle_error(SESSION(session), NULL, r);
3774                 log_warning(LOG_PROTOCOL, _("LIST failed\n"));
3775                 *ok = r;
3776                 return '\0';
3777         }
3778
3779         if (lep_list != NULL && clist_count(lep_list) > 0) {
3780                 clistiter * iter = clist_begin(lep_list);
3781                 struct mailimap_mailbox_list * mb;
3782                 mb = clist_content(iter);
3783
3784                 separator = mb->mb_delimiter;
3785                 debug_print("got separator: %c\n", folder->last_seen_separator);
3786         }
3787         *ok = MAILIMAP_NO_ERROR;
3788         mailimap_list_result_free(lep_list);
3789         return separator;
3790 }
3791
3792 static gchar imap_get_path_separator(IMAPSession *session, IMAPFolder *folder, const gchar *path, gint *ok)
3793 {
3794         gchar separator = '/';
3795         *ok = MAILIMAP_NO_ERROR;
3796         if (folder->last_seen_separator == 0) {
3797                 folder->last_seen_separator = imap_refresh_path_separator(session, folder, "", ok);
3798         }
3799
3800         if (folder->last_seen_separator == 0) {
3801                 folder->last_seen_separator = imap_refresh_path_separator(session, folder, "INBOX", ok);
3802         }
3803
3804         if (folder->last_seen_separator != 0) {
3805                 debug_print("using separator: %c\n", folder->last_seen_separator);
3806                 return folder->last_seen_separator;
3807         }
3808
3809         return separator;
3810 }
3811
3812 static gchar *imap_get_real_path(IMAPSession *session, IMAPFolder *folder, const gchar *path, gint *ok)
3813 {
3814         gchar *real_path = NULL;
3815         gchar separator;
3816
3817         g_return_val_if_fail(folder != NULL, NULL);
3818         g_return_val_if_fail(path != NULL, NULL);
3819
3820         *ok = MAILIMAP_NO_ERROR;
3821
3822         real_path = imap_utf8_to_modified_utf7(path, FALSE);
3823         separator = imap_get_path_separator(session, folder, path, ok);
3824         if (*ok == MAILIMAP_NO_ERROR)
3825                 imap_path_separator_subst(real_path, separator);
3826
3827         return real_path;
3828 }
3829
3830 static gint imap_set_message_flags(IMAPSession *session,
3831                                    IMAPFolderItem *item,
3832                                    MsgNumberList *numlist,
3833                                    IMAPFlags flags,
3834                                    GSList *tags,
3835                                    gboolean is_set)
3836 {
3837         gint ok = 0;
3838         GSList *seq_list;
3839         GSList * cur;
3840         gint total = 0;
3841         IMAPFolder *folder = NULL;
3842         GSList *sorted_list = NULL;
3843
3844         if (numlist == NULL || session == NULL)
3845                 return MAILIMAP_ERROR_BAD_STATE;
3846
3847         folder = IMAP_FOLDER(session->folder);
3848
3849         sorted_list = g_slist_copy(numlist);
3850         sorted_list = g_slist_sort(sorted_list, g_int_compare);
3851
3852         cur = g_slist_last(sorted_list);
3853
3854         if (cur)
3855                 total = GPOINTER_TO_INT(cur->data);
3856
3857         seq_list = imap_get_lep_set_from_numlist(IMAP_FOLDER(session->folder), sorted_list);
3858
3859         statusbar_print_all(_("Flagging messages..."));
3860
3861         for(cur = seq_list ; cur != NULL ; cur = g_slist_next(cur)) {
3862                 struct mailimap_set * imapset = (struct mailimap_set *)cur->data;
3863                 struct mailimap_set_item *set_item = NULL;
3864
3865                 if (imapset->set_list)
3866                         set_item = clist_content(clist_begin(imapset->set_list));
3867                 else
3868                         continue;
3869
3870                 if (set_item == NULL)
3871                         continue;
3872
3873                 statusbar_progress_all(set_item->set_first, total, 1);
3874
3875                 ok = imap_cmd_store(session, item, imapset,
3876                                     flags, tags, is_set);
3877                 statusbar_progress_all(set_item->set_last, total, 1);
3878                 if (ok != MAILIMAP_NO_ERROR && folder->max_set_size > 20) {
3879                         /* reduce max set size */
3880                         folder->max_set_size /= 2;
3881                 }
3882                 if (ok != MAILIMAP_NO_ERROR && is_fatal(ok)) {
3883                         break;
3884                 }
3885         }
3886
3887         g_slist_free(sorted_list);
3888
3889         statusbar_progress_all(0,0,0);
3890         statusbar_pop_all();
3891
3892         imap_lep_set_free(seq_list);
3893
3894         return ok;
3895 }
3896
3897 typedef struct _select_data {
3898         IMAPSession *session;
3899         gchar *real_path;
3900         gint *exists;
3901         gint *recent;
3902         gint *unseen;
3903         guint32 *uid_validity;
3904         gboolean done;
3905 } select_data;
3906
3907 static gint imap_select(IMAPSession *session, IMAPFolder *folder,
3908                         FolderItem *item,
3909                         gint *exists, gint *recent, gint *unseen,
3910                         guint32 *uid_validity, gint *can_create_flags,
3911                         gboolean block)
3912 {
3913         gchar *real_path;
3914         gint ok = MAILIMAP_NO_ERROR;
3915         gint exists_, recent_, unseen_;
3916         guint32 uid_validity_;
3917         gint can_create_flags_;
3918         const gchar *path = item ? item->path:NULL;
3919
3920         if (!item) {
3921                 return MAILIMAP_ERROR_BAD_STATE;
3922         }
3923
3924         if (!exists && !recent && !unseen && !uid_validity && !can_create_flags) {
3925                 if (session->mbox && strcmp(session->mbox, path) == 0)
3926                         return MAILIMAP_NO_ERROR;
3927         }
3928         if (!exists && !recent && !unseen && !uid_validity && can_create_flags) {
3929                 if (session->mbox && strcmp(session->mbox, path) == 0) {
3930                         if (IMAP_FOLDER_ITEM(item)->can_create_flags != ITEM_CAN_CREATE_FLAGS_UNKNOWN)
3931                                 return MAILIMAP_NO_ERROR;
3932                 }
3933         }
3934         if (!exists)
3935                 exists = &exists_;
3936         if (!recent)
3937                 recent = &recent_;
3938         if (!unseen)
3939                 unseen = &unseen_;
3940         if (!uid_validity)
3941                 uid_validity = &uid_validity_;
3942         if (!can_create_flags)
3943                 can_create_flags = &can_create_flags_;
3944
3945         g_free(session->mbox);
3946         session->mbox = NULL;
3947         session->exists = 0;
3948         session->recent = 0;
3949         session->expunge = 0;
3950
3951         real_path = imap_get_real_path(session, folder, path, &ok);
3952         if (is_fatal(ok)) {
3953                 g_free(real_path);
3954                 return ok;
3955         }
3956         g_slist_free(IMAP_FOLDER_ITEM(item)->ok_flags);
3957         IMAP_FOLDER_ITEM(item)->ok_flags = NULL;
3958         ok = imap_cmd_select(session, real_path,
3959                              exists, recent, unseen, uid_validity, can_create_flags,
3960                              &(IMAP_FOLDER_ITEM(item)->ok_flags), block);
3961         if (ok != MAILIMAP_NO_ERROR) {
3962                 log_warning(LOG_PROTOCOL, _("can't select folder: %s\n"), real_path);
3963         } else {
3964                 session->mbox = g_strdup(path);
3965                 session->folder_content_changed = FALSE;
3966                 session->exists = *exists;
3967                 session->recent = *recent;
3968                 session->expunge = 0;
3969                 session->unseen = *unseen;
3970                 session->uid_validity = *uid_validity;
3971                 debug_print("select: exists %d recent %d expunge %d uid_validity %d can_create_flags %d\n",
3972                         session->exists, session->recent, session->expunge,
3973                         session->uid_validity, *can_create_flags);
3974         }
3975         if (*can_create_flags) {
3976                 IMAP_FOLDER_ITEM(item)->can_create_flags = ITEM_CAN_CREATE_FLAGS;
3977         } else {
3978                 IMAP_FOLDER_ITEM(item)->can_create_flags = ITEM_CANNOT_CREATE_FLAGS;
3979         }
3980         g_free(real_path);
3981
3982         return ok;
3983 }
3984
3985 static gint imap_status(IMAPSession *session, IMAPFolder *folder,
3986                         const gchar *path, IMAPFolderItem *item,
3987                         gint *messages,
3988                         guint32 *uid_next, guint32 *uid_validity,
3989                         gint *unseen, gboolean block)
3990 {
3991         int r = MAILIMAP_NO_ERROR;
3992         clistiter * iter;
3993         struct mailimap_mailbox_data_status * data_status;
3994         int got_values;
3995         gchar *real_path;
3996         guint mask = 0;
3997
3998         real_path = imap_get_real_path(session, folder, path, &r);
3999         if (is_fatal(r)) {
4000                 g_free(real_path);
4001                 return r;
4002         }
4003         if (messages) {
4004                 mask |= 1 << 0;
4005                 *messages = 0;
4006         }
4007         if (uid_next) {
4008                 mask |= 1 << 2;
4009                 *uid_next = 0;
4010         }
4011         if (uid_validity) {
4012                 mask |= 1 << 3;
4013                 *uid_validity = 0;
4014         }
4015         if (unseen) {
4016                 mask |= 1 << 4;
4017                 *unseen = 0;
4018         }
4019
4020         if (session->mbox != NULL &&
4021             !strcmp(session->mbox, item->item.path)) {
4022                 r = imap_cmd_close(session);
4023                 if (r != MAILIMAP_NO_ERROR) {
4024                         debug_print("close err %d\n", r);
4025                         g_free(real_path);
4026                         return r;
4027                 }
4028         }
4029
4030         r = imap_threaded_status(FOLDER(folder), real_path,
4031                 &data_status, mask);
4032
4033         g_free(real_path);
4034         if (r != MAILIMAP_NO_ERROR) {
4035                 imap_handle_error(SESSION(session), NULL, r);
4036                 debug_print("status err %d\n", r);
4037                 return r;
4038         }
4039
4040         if (data_status == NULL || data_status->st_info_list == NULL) {
4041                 debug_print("data_status %p\n", data_status);
4042                 if (data_status) {
4043                         debug_print("data_status->st_info_list %p\n", data_status->st_info_list);
4044                         mailimap_mailbox_data_status_free(data_status);
4045                 }
4046                 return MAILIMAP_ERROR_BAD_STATE;
4047         }
4048
4049         got_values = 0;
4050         if (data_status->st_info_list) {
4051                 for(iter = clist_begin(data_status->st_info_list) ; iter != NULL ;
4052                     iter = clist_next(iter)) {
4053                         struct mailimap_status_info * info;
4054
4055                         info = clist_content(iter);
4056                         switch (info->st_att) {
4057                         case MAILIMAP_STATUS_ATT_MESSAGES:
4058                                 if (messages) {
4059                                         * messages = info->st_value;
4060                                         got_values |= 1 << 0;
4061                                 }
4062                                 break;
4063
4064                         case MAILIMAP_STATUS_ATT_UIDNEXT:
4065                                 if (uid_next) {
4066                                         * uid_next = info->st_value;
4067                                         got_values |= 1 << 2;
4068                                 }
4069                                 break;
4070
4071                         case MAILIMAP_STATUS_ATT_UIDVALIDITY:
4072                                 if (uid_validity) {
4073                                         * uid_validity = info->st_value;
4074                                         got_values |= 1 << 3;
4075                                 }
4076                                 break;
4077
4078                         case MAILIMAP_STATUS_ATT_UNSEEN:
4079                                 if (unseen) {
4080                                         * unseen = info->st_value;
4081                                         got_values |= 1 << 4;
4082                                 }
4083                                 break;
4084                         }
4085                 }
4086         }
4087         mailimap_mailbox_data_status_free(data_status);
4088
4089         if (got_values != mask) {
4090                 g_warning("status: incomplete values received (%d)", got_values);
4091         }
4092         return MAILIMAP_NO_ERROR;
4093 }
4094
4095 static void imap_free_capabilities(IMAPSession *session)
4096 {
4097         slist_free_strings_full(session->capability);
4098         session->capability = NULL;
4099 }
4100
4101 /* low-level IMAP4rev1 commands */
4102
4103 static gint imap_cmd_login(IMAPSession *session,
4104                            const gchar *user, const gchar *pass,
4105                            const gchar *type)
4106 {
4107         int r;
4108         gint ok;
4109
4110         if (!strcmp(type, "plaintext") && imap_has_capability(session, "LOGINDISABLED")) {
4111                 ok = MAILIMAP_ERROR_BAD_STATE;
4112                 if (imap_has_capability(session, "STARTTLS")) {
4113 #ifdef USE_GNUTLS
4114                         log_warning(LOG_PROTOCOL, _("Server requires STARTTLS to log in.\n"));
4115                         ok = imap_cmd_starttls(session);
4116                         if (ok != MAILIMAP_NO_ERROR) {
4117                                 log_warning(LOG_PROTOCOL, _("Can't start STARTTLS session.\n"));
4118                                 return ok;
4119                         } else {
4120                                 /* refresh capas */
4121                                 imap_free_capabilities(session);
4122                                 if ((r = imap_get_capabilities(session)) != MAILIMAP_NO_ERROR) {
4123                                         imap_handle_error(SESSION(session), NULL, r);
4124                                         log_warning(LOG_PROTOCOL, _("Can't refresh capabilities.\n"));
4125                                         return r;
4126                                 }
4127                         }
4128 #else
4129                         log_error(LOG_PROTOCOL, _("Connection to %s failed: "
4130                                         "server requires STARTTLS, but Claws Mail "
4131                                         "has been compiled without STARTTLS "
4132                                         "support.\n"),
4133                                         SESSION(session)->server);
4134                         return MAILIMAP_ERROR_LOGIN;
4135 #endif
4136                 } else {
4137                         log_error(LOG_PROTOCOL, _("Server logins are disabled.\n"));
4138                         return MAILIMAP_ERROR_LOGIN;
4139                 }
4140         }
4141
4142         log_print(LOG_PROTOCOL, "IMAP> Logging %s to %s using %s\n",
4143                         user,
4144                         SESSION(session)->server,
4145                         type);
4146         r = imap_threaded_login(session->folder, user, pass, type);
4147         if (r != MAILIMAP_NO_ERROR) {
4148                 imap_handle_error(SESSION(session), NULL, r);
4149                 log_print(LOG_PROTOCOL, "IMAP< Error logging in to %s\n",
4150                                 SESSION(session)->server);
4151                 ok = r;
4152         } else {
4153                 log_print(LOG_PROTOCOL, "IMAP< Login to %s successful\n",
4154                                 SESSION(session)->server);
4155                 ok = MAILIMAP_NO_ERROR;
4156         }
4157         return ok;
4158 }
4159
4160 static gint imap_cmd_noop(IMAPSession *session)
4161 {
4162         int r;
4163         unsigned int exists, recent, expunge, unseen, uidnext, uidval;
4164
4165         r = imap_threaded_noop(session->folder, &exists, &recent, &expunge, &unseen, &uidnext, &uidval);
4166         if (r != MAILIMAP_NO_ERROR) {
4167                 imap_handle_error(SESSION(session), NULL, r);
4168                 debug_print("noop err %d\n", r);
4169                 return r;
4170         }
4171
4172         if ((exists && exists != session->exists)
4173          || (recent && recent != session->recent)
4174          || (expunge && expunge != session->expunge)
4175          || (unseen && unseen != session->unseen)) {
4176                 session->folder_content_changed = TRUE;
4177         }
4178         if (uidnext != 0 && uidnext != session->uid_next) {
4179                 session->uid_next = uidnext;
4180                 session->folder_content_changed = TRUE;
4181         }
4182         if (uidval != 0 && uidval != session->uid_validity) {
4183                 session->uid_validity = uidval;
4184                 session->folder_content_changed = TRUE;
4185         }
4186
4187         session->exists = exists;
4188         session->recent = recent;
4189         session->expunge = expunge;
4190         session->unseen = unseen;
4191
4192         session_set_access_time(SESSION(session));
4193
4194         return MAILIMAP_NO_ERROR;
4195 }
4196
4197 #ifdef USE_GNUTLS
4198 static gint imap_cmd_starttls(IMAPSession *session)
4199 {
4200         int r;
4201
4202         r = imap_threaded_starttls(session->folder,
4203                 SESSION(session)->server, SESSION(session)->port);
4204         if (r != MAILIMAP_NO_ERROR) {
4205                 imap_handle_error(SESSION(session), NULL, r);
4206                 debug_print("STARTTLS err %d\n", r);
4207                 return r;
4208         }
4209         return MAILIMAP_NO_ERROR;
4210 }
4211 #endif
4212
4213 static gint imap_cmd_select(IMAPSession *session, const gchar *folder,
4214                             gint *exists, gint *recent, gint *unseen,
4215                             guint32 *uid_validity, gint *can_create_flags,
4216                             GSList **ok_flags, gboolean block)
4217 {
4218         int r;
4219
4220         r = imap_threaded_select(session->folder, folder,
4221                                  exists, recent, unseen, uid_validity, can_create_flags, ok_flags);
4222         if (r != MAILIMAP_NO_ERROR) {
4223                 imap_handle_error(SESSION(session), NULL, r);
4224                 debug_print("select err %d\n", r);
4225                 return r;
4226         }
4227         return MAILIMAP_NO_ERROR;
4228 }
4229
4230 static gint imap_cmd_close(IMAPSession *session)
4231 {
4232         int r;
4233
4234         r = imap_threaded_close(session->folder);
4235         if (r != MAILIMAP_NO_ERROR) {
4236                 imap_handle_error(SESSION(session), NULL, r);
4237                 debug_print("close err %d\n", r);
4238                 return r;
4239         }
4240         g_free(session->mbox);
4241         session->mbox = NULL;
4242         session->exists = 0;
4243         session->recent = 0;
4244         session->expunge = 0;
4245         return MAILIMAP_NO_ERROR;
4246 }
4247
4248 static gint imap_cmd_examine(IMAPSession *session, const gchar *folder,
4249                              gint *exists, gint *recent, gint *unseen,
4250                              guint32 *uid_validity, gboolean block)
4251 {
4252         int r;
4253
4254         r = imap_threaded_examine(session->folder, folder,
4255                                   exists, recent, unseen, uid_validity);
4256         if (r != MAILIMAP_NO_ERROR) {
4257                 imap_handle_error(SESSION(session), NULL, r);
4258                 debug_print("examine err %d\n", r);
4259
4260                 return r;
4261         }
4262         return MAILIMAP_NO_ERROR;
4263 }
4264
4265 static gint imap_cmd_create(IMAPSession *session, const gchar *folder)
4266 {
4267         int r;
4268
4269         r = imap_threaded_create(session->folder, folder);
4270         if (r != MAILIMAP_NO_ERROR) {
4271                 imap_handle_error(SESSION(session), NULL, r);
4272                 return r;
4273         }
4274
4275         return MAILIMAP_NO_ERROR;
4276 }
4277
4278 static gint imap_cmd_rename(IMAPSession *session, const gchar *old_folder,
4279                             const gchar *new_folder)
4280 {
4281         int r;
4282
4283         r = imap_threaded_rename(session->folder, old_folder,
4284                                  new_folder);
4285         if (r != MAILIMAP_NO_ERROR) {
4286                 imap_handle_error(SESSION(session), NULL, r);
4287                 return r;
4288         }
4289
4290         return MAILIMAP_NO_ERROR;
4291 }
4292
4293 static gint imap_cmd_delete(IMAPSession *session, const gchar *folder)
4294 {
4295         int r;
4296
4297
4298         r = imap_threaded_delete(session->folder, folder);
4299         if (r != MAILIMAP_NO_ERROR) {
4300                 imap_handle_error(SESSION(session), NULL, r);
4301                 return r;
4302         }
4303
4304         return MAILIMAP_NO_ERROR;
4305 }
4306
4307 typedef struct _fetch_data {
4308         IMAPSession *session;
4309         guint32 uid;
4310         const gchar *filename;
4311         gboolean headers;
4312         gboolean body;
4313         gboolean done;
4314 } fetch_data;
4315
4316 static void *imap_cmd_fetch_thread(void *data)
4317 {
4318         fetch_data *stuff = (fetch_data *)data;
4319         IMAPSession *session = stuff->session;
4320         guint32 uid = stuff->uid;
4321         const gchar *filename = stuff->filename;
4322         int r;
4323
4324         if (stuff->body) {
4325                 r = imap_threaded_fetch_content(session->folder,
4326                                                uid, 1, filename);
4327         }
4328         else {
4329                 r = imap_threaded_fetch_content(session->folder,
4330                                                 uid, 0, filename);
4331         }
4332         if (r != MAILIMAP_NO_ERROR) {
4333                 imap_handle_error(SESSION(session), NULL, r);
4334                 debug_print("fetch err %d\n", r);
4335                 return GINT_TO_POINTER(r);
4336         }
4337         return GINT_TO_POINTER(MAILIMAP_NO_ERROR);
4338 }
4339
4340 static gint imap_cmd_fetch(IMAPSession *session, guint32 uid,
4341                                 const gchar *filename, gboolean headers,
4342                                 gboolean body)
4343 {
4344         fetch_data *data = g_new0(fetch_data, 1);
4345         int result = 0;
4346         data->done = FALSE;
4347         data->session = session;
4348         data->uid = uid;
4349         data->filename = filename;
4350         data->headers = headers;
4351         data->body = body;
4352
4353         if (prefs_common.work_offline &&
4354             !inc_offline_should_override(FALSE,
4355                 _("Claws Mail needs network access in order "
4356                   "to access the IMAP server."))) {
4357                 g_free(data);
4358                 return -1;
4359         }
4360         statusbar_print_all(_("Fetching message..."));
4361         result = GPOINTER_TO_INT(imap_cmd_fetch_thread(data));
4362         statusbar_pop_all();
4363         g_free(data);
4364         return result;
4365 }
4366
4367
4368 static gint imap_cmd_append(IMAPSession *session,
4369                             IMAPFolderItem *item,
4370                             const gchar *destfolder,
4371                             const gchar *file, IMAPFlags flags,
4372                             guint32 *new_uid)
4373 {
4374         struct mailimap_flag_list * flag_list;
4375         int r;
4376
4377         cm_return_val_if_fail(file != NULL, MAILIMAP_ERROR_BAD_STATE);
4378
4379         flag_list = imap_flag_to_lep(item, flags, NULL);
4380         lock_session(session);
4381         r = imap_threaded_append(session->folder, destfolder,
4382                          file, flag_list, (int *)new_uid);
4383         mailimap_flag_list_free(flag_list);
4384
4385         if (r != MAILIMAP_NO_ERROR) {
4386                 imap_handle_error(SESSION(session), NULL, r);
4387                 debug_print("append err %d\n", r);
4388                 return r;
4389         }
4390
4391         unlock_session(session);
4392
4393         return MAILIMAP_NO_ERROR;
4394 }
4395
4396 static gint imap_cmd_copy(IMAPSession *session, struct mailimap_set * set,
4397                           const gchar *destfolder,
4398                           struct mailimap_set **source, struct mailimap_set **dest)
4399 {
4400         int r;
4401
4402         g_return_val_if_fail(session != NULL, MAILIMAP_ERROR_BAD_STATE);
4403         g_return_val_if_fail(set != NULL, MAILIMAP_ERROR_BAD_STATE);
4404         g_return_val_if_fail(destfolder != NULL, MAILIMAP_ERROR_BAD_STATE);
4405
4406         r = imap_threaded_copy(session->folder, set, destfolder, source, dest);
4407         if (r != MAILIMAP_NO_ERROR) {
4408                 imap_handle_error(SESSION(session), NULL, r);
4409                 return r;
4410         }
4411
4412         return MAILIMAP_NO_ERROR;
4413 }
4414
4415 static gint imap_cmd_store(IMAPSession *session,
4416                            IMAPFolderItem *item,
4417                            struct mailimap_set * set,
4418                            IMAPFlags flags, GSList *tags, int do_add)
4419 {
4420         int r;
4421         struct mailimap_flag_list * flag_list = NULL;
4422         struct mailimap_store_att_flags * store_att_flags;
4423
4424         flag_list = imap_flag_to_lep(item, flags, tags);
4425
4426         if (do_add)
4427                 store_att_flags =
4428                         mailimap_store_att_flags_new_add_flags_silent(flag_list);
4429         else
4430                 store_att_flags =
4431                         mailimap_store_att_flags_new_remove_flags_silent(flag_list);
4432
4433         r = imap_threaded_store(session->folder, set, store_att_flags);
4434         mailimap_store_att_flags_free(store_att_flags);
4435         if (r != MAILIMAP_NO_ERROR) {
4436                 imap_handle_error(SESSION(session), NULL, r);
4437                 return r;
4438         }
4439
4440         return MAILIMAP_NO_ERROR;
4441 }
4442
4443 static gint imap_cmd_expunge(IMAPSession *session)
4444 {
4445         int r;
4446
4447         if (prefs_common.work_offline &&
4448             !inc_offline_should_override(FALSE,
4449                 _("Claws Mail needs network access in order "
4450                   "to access the IMAP server."))) {
4451                 return -1;
4452         }
4453
4454         r = imap_threaded_expunge(session->folder);
4455         if (r != MAILIMAP_NO_ERROR) {
4456                 imap_handle_error(SESSION(session), NULL, r);
4457                 return r;
4458         }
4459
4460         return MAILIMAP_NO_ERROR;
4461 }
4462
4463 gint imap_expunge(Folder *folder, FolderItem *item)
4464 {
4465         IMAPSession *session = imap_session_get(folder);
4466         if (session == NULL)
4467                 return -1;
4468
4469         return imap_cmd_expunge(session);
4470 }
4471
4472 static void imap_path_separator_subst(gchar *str, gchar separator)
4473 {
4474         gchar *p;
4475         gboolean in_escape = FALSE;
4476
4477         if (!separator || separator == '/') return;
4478
4479         for (p = str; *p != '\0'; p++) {
4480                 if (*p == '/' && !in_escape)
4481                         *p = separator;
4482                 else if (*p == '&' && *(p + 1) != '-' && !in_escape)
4483                         in_escape = TRUE;
4484                 else if (*p == '-' && in_escape)
4485                         in_escape = FALSE;
4486         }
4487 }
4488
4489 static gboolean imap_rename_folder_func(GNode *node, gpointer data)
4490 {
4491         FolderItem *item = node->data;
4492         gchar **paths = data;
4493         const gchar *oldpath = paths[0];
4494         const gchar *newpath = paths[1];
4495         gchar *real_oldpath, *real_newpath;
4496         gchar *base;
4497         gchar *new_itempath;
4498         gint oldpathlen;
4499         IMAPSession *session = imap_session_get(item->folder);
4500         gint ok = MAILIMAP_NO_ERROR;
4501         oldpathlen = strlen(oldpath);
4502         if (strncmp(oldpath, item->path, oldpathlen) != 0) {
4503                 g_warning("path doesn't match: %s, %s", oldpath, item->path);
4504                 return TRUE;
4505         }
4506
4507         base = item->path + oldpathlen;
4508         while (*base == '/') base++;
4509         if (*base == '\0')
4510                 new_itempath = g_strdup(newpath);
4511         else
4512                 new_itempath = g_strconcat(newpath, "/", base,
4513                                            NULL);
4514
4515         real_oldpath = imap_get_real_path(session, IMAP_FOLDER(item->folder), item->path, &ok);
4516         g_free(item->path);
4517         item->path = new_itempath;
4518
4519         real_newpath = imap_get_real_path(session, IMAP_FOLDER(item->folder), item->path, &ok);
4520
4521         imap_threaded_subscribe(item->folder, real_oldpath, FALSE);
4522         imap_threaded_subscribe(item->folder, real_newpath, TRUE);
4523
4524         g_free(real_oldpath);
4525         g_free(real_newpath);
4526         return FALSE;
4527 }
4528
4529 static gint get_list_of_uids(IMAPSession *session, Folder *folder, IMAPFolderItem *item, GSList **msgnum_list)
4530 {
4531         GSList *uidlist, *elem;
4532         int r = -1;
4533         clist * lep_uidlist;
4534         gint ok, nummsgs = 0;
4535
4536         if (session == NULL) {
4537                 return -1;
4538         }
4539
4540         ok = imap_select(session, IMAP_FOLDER(folder), FOLDER_ITEM(item),
4541                          NULL, NULL, NULL, NULL, NULL, TRUE);
4542         if (ok != MAILIMAP_NO_ERROR) {
4543                 return -1;
4544         }
4545
4546         g_slist_free(item->uid_list);
4547         item->uid_list = NULL;
4548
4549         uidlist = NULL;
4550
4551         if (folder->account && folder->account->low_bandwidth) {
4552                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SIMPLE,
4553                                 NULL, NULL, NULL, &lep_uidlist);
4554         }
4555
4556         if (r == MAILIMAP_NO_ERROR) {
4557                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
4558                 mailimap_search_result_free(lep_uidlist);
4559         } else {
4560                 carray * lep_uidtab;
4561                 if (r != -1) { /* inited */
4562                         imap_handle_error(SESSION(session), NULL, r);
4563                         if (is_fatal(r))
4564                                 return -1;
4565                 }
4566                 r = imap_threaded_fetch_uid(folder, 1,
4567                                     &lep_uidtab);
4568                 if (r == MAILIMAP_NO_ERROR) {
4569                         uidlist = imap_uid_list_from_lep_tab(lep_uidtab);
4570                         imap_fetch_uid_list_free(lep_uidtab);
4571                 }
4572         }
4573
4574         if (r != MAILIMAP_NO_ERROR) {
4575                 imap_handle_error(SESSION(session), NULL, r);
4576                 return -1;
4577         }
4578
4579         for (elem = uidlist; elem != NULL; elem = g_slist_next(elem)) {
4580                 guint msgnum;
4581
4582                 msgnum = GPOINTER_TO_INT(elem->data);
4583
4584                 *msgnum_list = g_slist_prepend(*msgnum_list, GINT_TO_POINTER(msgnum));
4585                 item->uid_list = g_slist_prepend(item->uid_list, GINT_TO_POINTER(msgnum));
4586                 nummsgs++;
4587         }
4588         g_slist_free(uidlist);
4589
4590         return nummsgs;
4591
4592 }
4593
4594 gint imap_get_num_list(Folder *folder, FolderItem *_item, GSList **msgnum_list, gboolean *old_uids_valid)
4595 {
4596         IMAPFolderItem *item = (IMAPFolderItem *)_item;
4597         IMAPSession *session;
4598         gint nummsgs;
4599         GSList *uidlist = NULL;
4600         gchar *dir;
4601         gint known_list_len = 0;
4602         gchar *path;
4603
4604         debug_print("get_num_list\n");
4605
4606         g_return_val_if_fail(folder != NULL, -1);
4607         g_return_val_if_fail(item != NULL, -1);
4608         g_return_val_if_fail(item->item.path != NULL, -1);
4609         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
4610         g_return_val_if_fail(folder->account != NULL, -1);
4611
4612         known_list_len = g_slist_length(item->uid_list);
4613         if (!item->should_update) {
4614                 debug_print("get_num_list: nothing to update\n");
4615                 *old_uids_valid = TRUE;
4616                 if (known_list_len == item->item.total_msgs
4617                  && known_list_len > 0) {
4618                         *msgnum_list = g_slist_copy(item->uid_list);
4619                         return known_list_len;
4620                 } else {
4621                         debug_print("don't know the list length...\n");
4622                 }
4623         }
4624
4625         if (prefs_common.work_offline &&
4626             !inc_offline_should_override(FALSE,
4627                 _("Claws Mail needs network access in order "
4628                   "to access the IMAP server."))) {
4629                 return -1;
4630         }
4631
4632         path = folder_item_get_path(_item);
4633         if (!is_dir_exist(path)) {
4634                 if(is_file_exist(path))
4635                         claws_unlink(path);
4636                 make_dir_hier(path);
4637         }
4638         g_free(path);
4639
4640         debug_print("getting session...\n");
4641         session = imap_session_get(folder);
4642         g_return_val_if_fail(session != NULL, -1);
4643
4644         lock_session(session);
4645         if (FOLDER_ITEM(item)->path)
4646                 statusbar_print_all(_("Scanning folder %s/%s..."),
4647                                       FOLDER_ITEM(item)->folder->name,
4648                                       FOLDER_ITEM(item)->path);
4649         else
4650                 statusbar_print_all(_("Scanning folder %s..."),
4651                                       FOLDER_ITEM(item)->folder->name);
4652
4653         if (item->should_trash_cache) {
4654                 *old_uids_valid = FALSE;
4655                 debug_print("get_num_list: trashing num list\n");
4656                 debug_print("Freeing imap uid cache\n");
4657                 item->lastuid = 0;
4658                 g_slist_free(item->uid_list);
4659                 item->uid_list = NULL;
4660
4661                 imap_delete_all_cached_messages((FolderItem *)item);
4662         } else {
4663                 debug_print("get_num_list: updating num list\n");
4664                 *old_uids_valid = TRUE;
4665         }
4666
4667         nummsgs = get_list_of_uids(session, folder, item, &uidlist);
4668
4669         unlock_session(session);
4670
4671         /* session could be broken now, in case of fatal error */
4672
4673         debug_print("get_num_list: got %d msgs\n", nummsgs);
4674
4675         if (nummsgs < 0) {
4676                 statusbar_pop_all();
4677                 return -1;
4678         }
4679
4680         *msgnum_list = uidlist;
4681
4682         dir = folder_item_get_path((FolderItem *)item);
4683         debug_print("removing old messages from %s\n", dir);
4684         remove_numbered_files_not_in_list(dir, *msgnum_list);
4685         g_free(dir);
4686
4687         debug_print("get_num_list - ok - %i\n", nummsgs);
4688         statusbar_pop_all();
4689         item->should_trash_cache = FALSE;
4690         item->should_update = FALSE;
4691         return nummsgs;
4692 }
4693
4694 static MsgInfo *imap_parse_msg(const gchar *file, FolderItem *item)
4695 {
4696         MsgInfo *msginfo;
4697         MsgFlags flags;
4698
4699         flags.perm_flags = MSG_NEW|MSG_UNREAD;
4700         flags.tmp_flags = 0;
4701
4702         g_return_val_if_fail(item != NULL, NULL);
4703         g_return_val_if_fail(file != NULL, NULL);
4704
4705         if (folder_has_parent_of_type(item, F_QUEUE)) {
4706                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
4707         } else if (folder_has_parent_of_type(item, F_DRAFT)) {
4708                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
4709         }
4710
4711         msginfo = procheader_parse_file(file, flags, FALSE, FALSE);
4712         if (!msginfo) return NULL;
4713
4714         msginfo->plaintext_file = g_strdup(file);
4715         msginfo->folder = item;
4716
4717         return msginfo;
4718 }
4719
4720 GSList *imap_get_msginfos(Folder *folder, FolderItem *item,
4721                           GSList *msgnum_list)
4722 {
4723         IMAPSession *session;
4724         MsgInfoList *ret = NULL;
4725         gint ok;
4726
4727         debug_print("get_msginfos\n");
4728
4729         g_return_val_if_fail(folder != NULL, NULL);
4730         g_return_val_if_fail(item != NULL, NULL);
4731         g_return_val_if_fail(msgnum_list != NULL, NULL);
4732
4733         debug_print("getting session...\n");
4734         session = imap_session_get(folder);
4735         g_return_val_if_fail(session != NULL, NULL);
4736
4737         lock_session(session); /* unlocked later in the function */
4738
4739         debug_print("IMAP getting msginfos\n");
4740         ok = imap_select(session, IMAP_FOLDER(folder), item,
4741                          NULL, NULL, NULL, NULL, NULL, FALSE);
4742         if (ok != MAILIMAP_NO_ERROR) {
4743                 return NULL;
4744         }
4745         if (!(folder_has_parent_of_type(item, F_DRAFT) ||
4746               folder_has_parent_of_type(item, F_QUEUE))) {
4747                 ret = g_slist_concat(ret,
4748                         imap_get_uncached_messages(session, item,
4749                                                    msgnum_list, &ok));
4750                 if (ok != MAILIMAP_NO_ERROR)
4751                         return NULL;
4752                 unlock_session(session);
4753         } else {
4754                 MsgNumberList *sorted_list, *elem, *llast = NULL;
4755                 gint startnum, lastnum;
4756
4757                 unlock_session(session);
4758
4759                 sorted_list = g_slist_sort(g_slist_copy(msgnum_list), g_int_compare);
4760
4761                 startnum = lastnum = GPOINTER_TO_INT(sorted_list->data);
4762
4763                 llast = g_slist_last(ret);
4764                 for (elem = sorted_list;; elem = g_slist_next(elem)) {
4765                         guint num = 0;
4766
4767                         if (elem)
4768                                 num = GPOINTER_TO_INT(elem->data);
4769
4770                         if (num > lastnum + 1 || elem == NULL) {
4771                                 int i;
4772                                 for (i = startnum; i <= lastnum; ++i) {
4773                                         gchar *file;
4774                                         file = imap_fetch_msg(folder, item, i);
4775                                         if (file != NULL) {
4776                                                 MsgInfo *msginfo = imap_parse_msg(file, item);
4777                                                 if (msginfo != NULL) {
4778                                                         msginfo->msgnum = i;
4779                                                         if (llast == NULL)
4780                                                                 llast = ret = g_slist_append(ret, msginfo);
4781                                                         else {
4782                                                                 llast = g_slist_append(llast, msginfo);
4783                                                                 llast = llast->next;
4784                                                         }
4785                                                 }
4786                                                 g_free(file);
4787                                         }
4788                                 }
4789
4790                                 if (elem == NULL)
4791                                         break;
4792
4793                                 startnum = num;
4794                         }
4795                         lastnum = num;
4796                 }
4797
4798                 g_slist_free(sorted_list);
4799         }
4800         return ret;
4801 }
4802
4803 MsgInfo *imap_get_msginfo(Folder *folder, FolderItem *item, gint uid)
4804 {
4805         MsgInfo *msginfo = NULL;
4806         MsgInfoList *msginfolist;
4807         MsgNumberList numlist;
4808
4809         numlist.next = NULL;
4810         numlist.data = GINT_TO_POINTER(uid);
4811
4812         msginfolist = imap_get_msginfos(folder, item, &numlist);
4813         if (msginfolist != NULL) {
4814                 msginfo = msginfolist->data;
4815                 g_slist_free(msginfolist);
4816         }
4817
4818         return msginfo;
4819 }
4820
4821 gboolean imap_scan_required(Folder *folder, FolderItem *_item)
4822 {
4823         IMAPSession *session;
4824         IMAPFolderItem *item = (IMAPFolderItem *)_item;
4825         gint ok, exists = 0, unseen = 0;
4826         guint32 uid_next = 0, uid_val = 0;
4827         gboolean selected_folder;
4828
4829         g_return_val_if_fail(folder != NULL, FALSE);
4830         g_return_val_if_fail(item != NULL, FALSE);
4831         g_return_val_if_fail(item->item.folder != NULL, FALSE);
4832         g_return_val_if_fail(FOLDER_CLASS(item->item.folder) == &imap_class, FALSE);
4833
4834         if (item->item.path == NULL)
4835                 return FALSE;
4836
4837         if (item->should_update) {
4838                 debug_print("scan already required\n");
4839                 return TRUE;
4840         }
4841         debug_print("getting session...\n");
4842         session = imap_session_get(folder);
4843
4844         g_return_val_if_fail(session != NULL, FALSE);
4845         lock_session(session); /* unlocked later in the function */
4846
4847         selected_folder = (session->mbox != NULL) &&
4848                           (!strcmp(session->mbox, item->item.path));
4849         if (selected_folder) {
4850                 if (!session->folder_content_changed) {
4851                         ok = imap_cmd_noop(session);
4852                         if (ok != MAILIMAP_NO_ERROR) {
4853                                 debug_print("disconnected!\n");
4854                                 if (!is_fatal(ok))
4855                                         session = imap_reconnect_if_possible(folder, session);
4856                                 else
4857                                         session = imap_session_get(folder);
4858                                 if (session == NULL)
4859                                         return FALSE;
4860                         }
4861
4862                         if (session->folder_content_changed) {
4863                                 debug_print("CHANGED (self-noop)! scan_required\n");
4864                                 item->should_update = TRUE;
4865                                 if (session->uid_validity && session->uid_validity != item->item.mtime) {
4866                                         item->item.mtime = session->uid_validity;
4867                                         item->should_trash_cache = TRUE;
4868                                 }
4869                                 unlock_session(session);
4870                                 return TRUE;
4871                         }
4872                 } else {
4873                         debug_print("CHANGED (previous noop)! scan_required\n");
4874                         item->should_update = TRUE;
4875                         if (session->uid_validity && session->uid_validity != item->item.mtime) {
4876                                 item->item.mtime = session->uid_validity;
4877                                 item->should_trash_cache = TRUE;
4878                         }
4879                         unlock_session(session);
4880                         return TRUE;
4881                 }
4882         } else {
4883                 ok = imap_status(session, IMAP_FOLDER(folder), item->item.path, IMAP_FOLDER_ITEM(item),
4884                                  &exists, &uid_next, &uid_val, &unseen, FALSE);
4885                 if (ok != MAILIMAP_NO_ERROR) {
4886                         return FALSE;
4887                 }
4888
4889                 debug_print("exists %d, item->item.total_msgs %d\n"
4890                             "\tunseen %d, item->item.unread_msgs %d\n"
4891                             "\tuid_next %d, item->uid_next %d\n"
4892                             "\tuid_val %d, item->item.mtime %ld\n",
4893                             exists, item->item.total_msgs, unseen, item->item.unread_msgs,
4894                             uid_next, item->uid_next, uid_val, (long)(item->item.mtime));
4895                 if (exists != item->item.total_msgs
4896                     || unseen != item->item.unread_msgs
4897                     || uid_next != item->uid_next
4898                     || uid_val != item->item.mtime) {
4899                         debug_print("CHANGED (status)! scan_required\n");
4900                         item->last_change = time(NULL);
4901                         item->should_update = TRUE;
4902                         item->uid_next = uid_next;
4903                         if (uid_val != item->item.mtime) {
4904                                 item->item.mtime = uid_val;
4905                                 item->should_trash_cache = TRUE;
4906                         }
4907                         unlock_session(session);
4908                         return TRUE;
4909                 }
4910         }
4911         unlock_session(session);
4912
4913         item->should_update = FALSE;
4914         return FALSE;
4915 }
4916
4917 void imap_change_flags(Folder *folder, FolderItem *item, MsgInfo *msginfo, MsgPermFlags newflags)
4918 {
4919         IMAPSession *session;
4920         IMAPFlags flags_set = 0, flags_unset = 0;
4921         gint ok = MAILIMAP_NO_ERROR;
4922         MsgNumberList numlist;
4923         hashtable_data *ht_data = NULL;
4924
4925         g_return_if_fail(folder != NULL);
4926         g_return_if_fail(folder->klass == &imap_class);
4927         g_return_if_fail(item != NULL);
4928         g_return_if_fail(item->folder == folder);
4929         g_return_if_fail(msginfo != NULL);
4930         g_return_if_fail(msginfo->folder == item);
4931
4932         if (!MSG_IS_MARKED(msginfo->flags) &&  (newflags & MSG_MARKED))
4933                 flags_set |= IMAP_FLAG_FLAGGED;
4934         if ( MSG_IS_MARKED(msginfo->flags) && !(newflags & MSG_MARKED))
4935                 flags_unset |= IMAP_FLAG_FLAGGED;
4936
4937         if (!MSG_IS_UNREAD(msginfo->flags) &&  (newflags & MSG_UNREAD))
4938                 flags_unset |= IMAP_FLAG_SEEN;
4939         if ( MSG_IS_UNREAD(msginfo->flags) && !(newflags & MSG_UNREAD))
4940                 flags_set |= IMAP_FLAG_SEEN;
4941
4942         if (!MSG_IS_REPLIED(msginfo->flags) &&  (newflags & MSG_REPLIED))
4943                 flags_set |= IMAP_FLAG_ANSWERED;
4944         if ( MSG_IS_REPLIED(msginfo->flags) && !(newflags & MSG_REPLIED))
4945                 flags_unset |= IMAP_FLAG_ANSWERED;
4946
4947         if (!MSG_IS_FORWARDED(msginfo->flags) &&  (newflags & MSG_FORWARDED))
4948                 flags_set |= IMAP_FLAG_FORWARDED;
4949         if ( MSG_IS_FORWARDED(msginfo->flags) && !(newflags & MSG_FORWARDED))
4950                 flags_unset |= IMAP_FLAG_FORWARDED;
4951
4952         if (!MSG_IS_SPAM(msginfo->flags) &&  (newflags & MSG_SPAM)) {
4953                 flags_set |= IMAP_FLAG_SPAM;
4954                 flags_unset |= IMAP_FLAG_HAM;
4955         }
4956         if ( MSG_IS_SPAM(msginfo->flags) && !(newflags & MSG_SPAM)) {
4957                 flags_set |= IMAP_FLAG_HAM;
4958                 flags_unset |= IMAP_FLAG_SPAM;
4959         }
4960         if (!MSG_IS_DELETED(msginfo->flags) &&  (newflags & MSG_DELETED))
4961                 flags_set |= IMAP_FLAG_DELETED;
4962         if ( MSG_IS_DELETED(msginfo->flags) && !(newflags & MSG_DELETED))
4963                 flags_unset |= IMAP_FLAG_DELETED;
4964
4965         if (!flags_set && !flags_unset) {
4966                 /* the changed flags were not translatable to IMAP-speak.
4967                  * like MSG_POSTFILTERED, so just apply. */
4968                 msginfo->flags.perm_flags = newflags;
4969                 return;
4970         }
4971
4972         debug_print("getting session...\n");
4973         session = imap_session_get(folder);
4974         if (!session) {
4975                 return;
4976         }
4977
4978         if ((ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
4979             NULL, NULL, NULL, NULL, NULL, FALSE)) != MAILIMAP_NO_ERROR) {
4980                 return;
4981         }
4982         numlist.next = NULL;
4983         numlist.data = GINT_TO_POINTER(msginfo->msgnum);
4984
4985         if (IMAP_FOLDER_ITEM(item)->batching) {
4986                 /* instead of performing an UID STORE command for each message change,
4987                  * as a lot of them can change "together", we just fill in hashtables
4988                  * and defer the treatment so that we're able to send only one
4989                  * command.
4990                  */
4991                 debug_print("IMAP batch mode on, deferring flags change\n");
4992                 if (flags_set) {
4993                         ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->flags_set_table,
4994                                 GINT_TO_POINTER(flags_set));
4995                         if (ht_data == NULL) {
4996                                 ht_data = g_new0(hashtable_data, 1);
4997                                 ht_data->item = IMAP_FOLDER_ITEM(item);
4998                                 g_hash_table_insert(IMAP_FOLDER_ITEM(item)->flags_set_table,
4999                                         GINT_TO_POINTER(flags_set), ht_data);
5000                         }
5001                         ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
5002                 }
5003                 if (flags_unset) {
5004                         ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->flags_unset_table,
5005                                 GINT_TO_POINTER(flags_unset));
5006                         if (ht_data == NULL) {
5007                                 ht_data = g_new0(hashtable_data, 1);
5008                                 ht_data->item = IMAP_FOLDER_ITEM(item);
5009                                 g_hash_table_insert(IMAP_FOLDER_ITEM(item)->flags_unset_table,
5010                                         GINT_TO_POINTER(flags_unset), ht_data);
5011                         }
5012                         ht_data->msglist = g_slist_prepend(ht_data->msglist,
5013                                         GINT_TO_POINTER(msginfo->msgnum));
5014                 }
5015         } else {
5016                 debug_print("IMAP changing flags\n");
5017                 if (flags_set) {
5018                         ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item), &numlist, flags_set, NULL, TRUE);
5019                         if (ok != MAILIMAP_NO_ERROR) {
5020                                 return;
5021                         }
5022                 }
5023
5024                 if (flags_unset) {
5025                         ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item), &numlist, flags_unset, NULL, FALSE);
5026                         if (ok != MAILIMAP_NO_ERROR) {
5027                                 return;
5028                         }
5029                 }
5030         }
5031         msginfo->flags.perm_flags = newflags;
5032         return;
5033 }
5034
5035 static gint imap_remove_msg(Folder *folder, FolderItem *item, gint uid)
5036 {
5037         gint ok;
5038         IMAPSession *session;
5039         gchar *dir;
5040         MsgNumberList numlist;
5041
5042         g_return_val_if_fail(folder != NULL, -1);
5043         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
5044         g_return_val_if_fail(item != NULL, -1);
5045
5046         debug_print("getting session...\n");
5047         session = imap_session_get(folder);
5048         if (!session) return -1;
5049
5050         ok = imap_select(session, IMAP_FOLDER(folder), item,
5051                          NULL, NULL, NULL, NULL, NULL, FALSE);
5052         if (ok != MAILIMAP_NO_ERROR) {
5053                 return ok;
5054         }
5055         numlist.next = NULL;
5056         numlist.data = GINT_TO_POINTER(uid);
5057
5058         ok = imap_set_message_flags
5059                 (session, IMAP_FOLDER_ITEM(item), &numlist, IMAP_FLAG_DELETED, NULL, TRUE);
5060         if (ok != MAILIMAP_NO_ERROR) {
5061                 log_warning(LOG_PROTOCOL, _("can't set deleted flags: %d\n"), uid);
5062                 return ok;
5063         }
5064
5065         ok = imap_cmd_expunge(session);
5066
5067         if (ok != MAILIMAP_NO_ERROR) {
5068                 log_warning(LOG_PROTOCOL, _("can't expunge\n"));
5069                 return ok;
5070         }
5071
5072         IMAP_FOLDER_ITEM(item)->uid_list = g_slist_remove(
5073             IMAP_FOLDER_ITEM(item)->uid_list, numlist.data);
5074         dir = folder_item_get_path(item);
5075         if (is_dir_exist(dir))
5076                 remove_numbered_files(dir, uid, uid);
5077         g_free(dir);
5078         return MAILIMAP_NO_ERROR;
5079 }
5080
5081 static gint compare_msginfo(gconstpointer a, gconstpointer b)
5082 {
5083         return ((MsgInfo *)a)->msgnum - ((MsgInfo *)b)->msgnum;
5084 }
5085
5086 static guint gslist_find_next_num(MsgNumberList **list, guint num)
5087 {
5088         GSList *elem;
5089
5090         g_return_val_if_fail(list != NULL, -1);
5091
5092         for (elem = *list; elem != NULL; elem = g_slist_next(elem))
5093                 if (GPOINTER_TO_INT(elem->data) >= num)
5094                         break;
5095         *list = elem;
5096         return elem != NULL ? GPOINTER_TO_INT(elem->data) : (gint)-1;
5097 }
5098
5099 static gboolean flag_ok(IMAPFolderItem *item, guint flag)
5100 {
5101         if (item->ok_flags && g_slist_find(item->ok_flags, GUINT_TO_POINTER(flag))) {
5102                 debug_print("flag %d is OK\n", flag);
5103                 return TRUE;
5104         }
5105         if (item->can_create_flags == ITEM_CAN_CREATE_FLAGS) {
5106                 debug_print("creating flags is OK\n");
5107                 return TRUE;
5108         }
5109         return FALSE;
5110 }
5111
5112 /*
5113  * NEW and DELETED flags are not syncronized
5114  * - The NEW/RECENT flags in IMAP folders can not really be directly
5115  *   modified by Claws Mail
5116  * - The DELETE/DELETED flag in IMAP and Claws Mail do not have the same
5117  *   meaning, in IMAP it always removes the messages from the FolderItem
5118  *   in Claws Mail it can mean to move the message to Trash
5119  */
5120
5121 typedef struct _get_flags_data {
5122         Folder *folder;
5123         FolderItem *item;
5124         MsgInfoList *msginfo_list;
5125         GHashTable *msgflags;
5126         gboolean full_search;
5127         gboolean done;
5128 } get_flags_data;
5129
5130 static /*gint*/ void *imap_get_flags_thread(void *data)
5131 {
5132         get_flags_data *stuff = (get_flags_data *)data;
5133         Folder *folder = stuff->folder;
5134         FolderItem *fitem = (FolderItem *) stuff->item;
5135         MsgInfoList *msginfo_list = stuff->msginfo_list;
5136         GHashTable *msgflags = stuff->msgflags;
5137         GSList *elem;
5138         carray * lep_uidtab;
5139         IMAPSession *session;
5140         gint ok;
5141         int r = MAILIMAP_NO_ERROR;
5142         GHashTable *flags_hash = NULL;
5143         GHashTable *tags_hash = NULL;
5144         gboolean full_search = stuff->full_search;
5145         GSList *sorted_list = NULL;
5146         GSList *unseen = NULL, *answered = NULL, *flagged = NULL, *deleted = NULL, *forwarded = NULL, *spam = NULL;
5147         GSList *seq_list, *cur;
5148         gboolean reverse_seen = FALSE;
5149         gboolean selected_folder;
5150         gint exists_cnt, unseen_cnt;
5151         gboolean got_alien_tags = FALSE;
5152
5153         session = imap_session_get(folder);
5154
5155         if (session == NULL) {
5156                 stuff->done = TRUE;
5157                 return GINT_TO_POINTER(-1);
5158         }
5159         selected_folder = (session->mbox != NULL) &&
5160                           (!strcmp(session->mbox, fitem->path));
5161
5162         lock_session(session);
5163         if (!selected_folder) {
5164                 ok = imap_select(session, IMAP_FOLDER(folder), fitem,
5165                         &exists_cnt, NULL, &unseen_cnt, NULL, NULL, TRUE);
5166                 if (ok != MAILIMAP_NO_ERROR) {
5167                         stuff->done = TRUE;
5168                         return GINT_TO_POINTER(-1);
5169                 }
5170
5171                 if (unseen_cnt > exists_cnt / 2)
5172                         reverse_seen = TRUE;
5173         }
5174         else {
5175                 if (fitem->unread_msgs > fitem->total_msgs / 2)
5176                         reverse_seen = TRUE;
5177         }
5178
5179         sorted_list = g_slist_sort(g_slist_copy(msginfo_list), compare_msginfo);
5180         if (!full_search) {
5181                 seq_list = imap_get_lep_set_from_msglist(IMAP_FOLDER(folder), msginfo_list);
5182         } else {
5183                 struct mailimap_set * set;
5184                 set = mailimap_set_new_interval(1, 0);
5185                 seq_list = g_slist_append(NULL, set);
5186         }
5187
5188         if (folder->account && folder->account->low_bandwidth) {
5189                 for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
5190                         struct mailimap_set * imapset;
5191                         clist * lep_uidlist;
5192                         int r;
5193
5194                         imapset = cur->data;
5195                         if (reverse_seen) {
5196                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SEEN, NULL,
5197                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5198                         }
5199                         else {
5200                                 r = imap_threaded_search(folder,
5201                                                          IMAP_SEARCH_TYPE_UNSEEN, NULL,
5202                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5203                         }
5204                         if (r == MAILIMAP_NO_ERROR) {
5205                                 GSList * uidlist;
5206
5207                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5208                                 mailimap_search_result_free(lep_uidlist);
5209
5210                                 unseen = g_slist_concat(unseen, uidlist);
5211                         } else {
5212                                 imap_handle_error(SESSION(session), NULL, r);
5213                                 goto bail;
5214                         }
5215
5216                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_FLAGGED, NULL,
5217                                                  NULL, full_search ? NULL:imapset, &lep_uidlist);
5218                         if (r == MAILIMAP_NO_ERROR) {
5219                                 GSList * uidlist;
5220
5221                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5222                                 mailimap_search_result_free(lep_uidlist);
5223
5224                                 flagged = g_slist_concat(flagged, uidlist);
5225                         } else {
5226                                 imap_handle_error(SESSION(session), NULL, r);
5227                                 goto bail;
5228                         }
5229
5230                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
5231                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_ANSWERED, NULL,
5232                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5233                                 if (r == MAILIMAP_NO_ERROR) {
5234                                         GSList * uidlist;
5235
5236                                         uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5237                                         mailimap_search_result_free(lep_uidlist);
5238
5239                                         answered = g_slist_concat(answered, uidlist);
5240                                 } else {
5241                                         imap_handle_error(SESSION(session), NULL, r);
5242                                         goto bail;
5243                                 }
5244
5245                                 if (flag_ok(IMAP_FOLDER_ITEM(fitem), IMAP_FLAG_FORWARDED)) {
5246                                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_FORWARDED, NULL,
5247                                                                  NULL, full_search ? NULL:imapset, &lep_uidlist);
5248                                         if (r == MAILIMAP_NO_ERROR) {
5249                                                 GSList * uidlist;
5250
5251                                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5252                                                 mailimap_search_result_free(lep_uidlist);
5253
5254                                                 forwarded = g_slist_concat(forwarded, uidlist);
5255                                         } else {
5256                                                 imap_handle_error(SESSION(session), NULL, r);
5257                                                 goto bail;
5258                                         }
5259                                 }
5260
5261                                 if (flag_ok(IMAP_FOLDER_ITEM(fitem), IMAP_FLAG_SPAM)) {
5262                                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SPAM, NULL,
5263                                                                  NULL, full_search ? NULL:imapset, &lep_uidlist);
5264                                         if (r == MAILIMAP_NO_ERROR) {
5265                                                 GSList * uidlist;
5266
5267                                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5268                                                 mailimap_search_result_free(lep_uidlist);
5269
5270                                                 spam = g_slist_concat(spam, uidlist);
5271                                         } else {
5272                                                 imap_handle_error(SESSION(session), NULL, r);
5273                                                 goto bail;
5274                                         }
5275                                 }
5276
5277                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_DELETED, NULL,
5278                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5279                                 if (r == MAILIMAP_NO_ERROR) {
5280                                         GSList * uidlist;
5281
5282                                         uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5283                                         mailimap_search_result_free(lep_uidlist);
5284
5285                                         deleted = g_slist_concat(deleted, uidlist);
5286                                 } else {
5287                                         imap_handle_error(SESSION(session), NULL, r);
5288                                         goto bail;
5289                                 }
5290                         }
5291                 }
5292
5293         } else {
5294                 r = imap_threaded_fetch_uid_flags(folder, 1, &lep_uidtab);
5295                 if (r == MAILIMAP_NO_ERROR) {
5296                         flags_hash = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, NULL);
5297                         tags_hash = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, NULL);
5298                         imap_flags_hash_from_lep_uid_flags_tab(lep_uidtab, flags_hash, tags_hash);
5299                         imap_fetch_uid_flags_list_free(lep_uidtab);
5300                 } else {
5301                         imap_handle_error(SESSION(session), NULL, r);
5302                         goto bail;
5303                 }
5304         }
5305
5306 bail:
5307         if (r == MAILIMAP_NO_ERROR)
5308                 unlock_session(session);
5309
5310         for (elem = sorted_list; elem != NULL; elem = g_slist_next(elem)) {
5311                 MsgInfo *msginfo;
5312                 MsgPermFlags flags, oldflags;
5313                 gboolean wasnew;
5314
5315                 msginfo = (MsgInfo *) elem->data;
5316                 flags = msginfo->flags.perm_flags;
5317                 wasnew = (flags & MSG_NEW);
5318                 oldflags = flags & ~(MSG_NEW|MSG_UNREAD|MSG_REPLIED|MSG_FORWARDED|MSG_MARKED|MSG_DELETED|MSG_SPAM);
5319
5320                 if (folder->account && folder->account->low_bandwidth) {
5321                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
5322                                 flags &= ~((reverse_seen ? 0 : MSG_UNREAD | MSG_NEW) | MSG_REPLIED | MSG_FORWARDED | MSG_MARKED | MSG_SPAM);
5323                         } else {
5324                                 flags &= ~((reverse_seen ? 0 : MSG_UNREAD | MSG_NEW | MSG_MARKED));
5325                         }
5326                         if (reverse_seen)
5327                                 flags |= MSG_UNREAD | (wasnew ? MSG_NEW : 0);
5328                         if (gslist_find_next_num(&unseen, msginfo->msgnum) == msginfo->msgnum) {
5329                                 if (!reverse_seen) {
5330                                         flags |= MSG_UNREAD | (wasnew ? MSG_NEW : 0);
5331                                 } else {
5332                                         flags &= ~(MSG_UNREAD | MSG_NEW);
5333                                 }
5334                         }
5335
5336                         if (gslist_find_next_num(&flagged, msginfo->msgnum) == msginfo->msgnum)
5337                                 flags |= MSG_MARKED;
5338                         else
5339                                 flags &= ~MSG_MARKED;
5340
5341                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
5342                                 if (gslist_find_next_num(&answered, msginfo->msgnum) == msginfo->msgnum)
5343                                         flags |= MSG_REPLIED;
5344                                 else
5345                                         flags &= ~MSG_REPLIED;
5346                                 if (gslist_find_next_num(&forwarded, msginfo->msgnum) == msginfo->msgnum)
5347                                         flags |= MSG_FORWARDED;
5348                                 else
5349                                         flags &= ~MSG_FORWARDED;
5350                                 if (gslist_find_next_num(&spam, msginfo->msgnum) == msginfo->msgnum)
5351                                         flags |= MSG_SPAM;
5352                                 else
5353                                         flags &= ~MSG_SPAM;
5354                                 if (gslist_find_next_num(&deleted, msginfo->msgnum) == msginfo->msgnum)
5355                                         flags |= MSG_DELETED;
5356                                 else
5357                                         flags &= ~MSG_DELETED;
5358                         }
5359                 } else {
5360                         if (flags_hash != NULL) {
5361
5362                                 flags = GPOINTER_TO_INT(g_hash_table_lookup(flags_hash,
5363                                                 GINT_TO_POINTER(msginfo->msgnum)));
5364                         }
5365
5366                         if ((flags & MSG_UNREAD) == 0)
5367                                 flags &= ~MSG_NEW;
5368                         else if (wasnew)
5369                                 flags |= MSG_NEW;
5370                         flags |= oldflags;
5371
5372                         if (tags_hash != NULL) {
5373                                 GSList *tags = g_hash_table_lookup(tags_hash, GINT_TO_POINTER(msginfo->msgnum));
5374                                 GSList *cur;
5375
5376                                 g_slist_free(msginfo->tags);
5377                                 msginfo->tags = NULL;
5378
5379                                 for (cur = tags; cur; cur = cur->next) {
5380                                         gchar *real_tag = imap_modified_utf7_to_utf8(cur->data, TRUE);
5381                                         gint id = 0;
5382                                         id = tags_get_id_for_str(real_tag);
5383                                         if (id == -1) {
5384                                                 id = tags_add_tag(real_tag);
5385                                                 got_alien_tags = TRUE;
5386                                         }
5387                                         msginfo->tags = g_slist_append(
5388                                                                 msginfo->tags,
5389                                                                 GINT_TO_POINTER(id));
5390                                         g_free(real_tag);
5391                                 }
5392                                 slist_free_strings_full(tags);
5393                         }
5394                 }
5395
5396                 g_hash_table_insert(msgflags, msginfo, GINT_TO_POINTER(flags));
5397         }
5398
5399         if (got_alien_tags) {
5400                 tags_write_tags();
5401                 main_window_reflect_tags_changes(mainwindow_get_mainwindow());
5402         }
5403
5404         if (flags_hash)
5405                 g_hash_table_destroy(flags_hash);
5406         if (tags_hash)
5407                 g_hash_table_destroy(tags_hash);
5408
5409         imap_lep_set_free(seq_list);
5410         g_slist_free(flagged);
5411         g_slist_free(deleted);
5412         g_slist_free(answered);
5413         g_slist_free(forwarded);
5414         g_slist_free(spam);
5415         g_slist_free(unseen);
5416         g_slist_free(sorted_list);
5417
5418         stuff->done = TRUE;
5419         return GINT_TO_POINTER(0);
5420 }
5421
5422 static gint imap_get_flags(Folder *folder, FolderItem *item,
5423                            MsgInfoList *msginfo_list, GHashTable *msgflags)
5424 {
5425         gint result;
5426         get_flags_data *data = g_new0(get_flags_data, 1);
5427         data->done = FALSE;
5428         data->folder = folder;
5429         data->item = item;
5430         data->msginfo_list = msginfo_list;
5431         data->msgflags = msgflags;
5432         data->full_search = FALSE;
5433
5434         GSList *tmp = NULL, *cur;
5435
5436         if (prefs_common.work_offline &&
5437             !inc_offline_should_override(FALSE,
5438                 _("Claws Mail needs network access in order "
5439                   "to access the IMAP server."))) {
5440                 g_free(data);
5441                 return -1;
5442         }
5443
5444         tmp = folder_item_get_msg_list(item);
5445
5446         if (g_slist_length(tmp) <= g_slist_length(msginfo_list))
5447                 data->full_search = TRUE;
5448
5449         for (cur = tmp; cur; cur = cur->next)
5450                 procmsg_msginfo_free((MsgInfo **)&(cur->data));
5451
5452         g_slist_free(tmp);
5453
5454         result = GPOINTER_TO_INT(imap_get_flags_thread(data));
5455
5456         g_free(data);
5457         return result;
5458
5459 }
5460
5461 static gboolean process_flags(gpointer key, gpointer value, gpointer user_data)
5462 {
5463         gboolean flags_set = GPOINTER_TO_INT(user_data);
5464         gint flags_value = GPOINTER_TO_INT(key);
5465         hashtable_data *data = (hashtable_data *)value;
5466         IMAPFolderItem *_item = data->item;
5467         FolderItem *item = (FolderItem *)_item;
5468         gint ok = MAILIMAP_ERROR_BAD_STATE;
5469         IMAPSession *session = NULL;
5470
5471         debug_print("getting session...\n");
5472         session = imap_session_get(item->folder);
5473
5474         data->msglist = g_slist_reverse(data->msglist);
5475
5476         debug_print("IMAP %ssetting flags to %d for %d messages\n",
5477                 flags_set?"":"un",
5478                 flags_value,
5479                 g_slist_length(data->msglist));
5480
5481         lock_session(session);
5482         if (session) {
5483                 ok = imap_select(session, IMAP_FOLDER(item->folder), item,
5484                          NULL, NULL, NULL, NULL, NULL, FALSE);
5485         }
5486         if (ok == MAILIMAP_NO_ERROR) {
5487                 ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item),
5488                         data->msglist, flags_value, NULL, flags_set);
5489         } else {
5490                 g_warning("can't select mailbox %s", item->path);
5491         }
5492
5493         if (!is_fatal(ok))
5494                 unlock_session(session);
5495
5496         g_slist_free(data->msglist);
5497         g_free(data);
5498         return TRUE;
5499 }
5500
5501 static gboolean process_tags(gpointer key, gpointer value, gpointer user_data)
5502 {
5503         gboolean tags_set = GPOINTER_TO_INT(user_data);
5504         TagsData *data = (TagsData *)value;
5505         IMAPFolderItem *_item = data->item;
5506         FolderItem *item = (FolderItem *)_item;
5507         gchar *str = data->str;
5508         gint ok = MAILIMAP_ERROR_BAD_STATE;
5509         IMAPSession *session = NULL;
5510
5511         debug_print("getting session...\n");
5512         session = imap_session_get(item->folder);
5513
5514         data->msglist = g_slist_reverse(data->msglist);
5515
5516         debug_print("IMAP %ssetting tags %s for %d messages\n",
5517                 tags_set?"":"un",
5518                 str,
5519                 g_slist_length(data->msglist));
5520
5521         lock_session(session);
5522         if (session) {
5523                 ok = imap_select(session, IMAP_FOLDER(item->folder), item,
5524                          NULL, NULL, NULL, NULL, NULL, FALSE);
5525         }
5526         if (ok == MAILIMAP_NO_ERROR) {
5527                 GSList list;
5528                 list.data = str;
5529                 list.next = NULL;
5530                 ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item),
5531                         data->msglist, 0, &list, tags_set);
5532         } else {
5533                 g_warning("can't select mailbox %s", item->path);
5534         }
5535
5536         if (!is_fatal(ok))
5537                 unlock_session(session);
5538
5539         g_slist_free(data->msglist);
5540         g_free(data->str);
5541         g_free(data);
5542         return TRUE;
5543 }
5544
5545 static void process_hashtable(IMAPFolderItem *item)
5546 {
5547         if (item->flags_set_table) {
5548                 g_hash_table_foreach_remove(item->flags_set_table, process_flags, GINT_TO_POINTER(TRUE));
5549                 g_hash_table_destroy(item->flags_set_table);
5550                 item->flags_set_table = NULL;
5551         }
5552         if (item->flags_unset_table) {
5553                 g_hash_table_foreach_remove(item->flags_unset_table, process_flags, GINT_TO_POINTER(FALSE));
5554                 g_hash_table_destroy(item->flags_unset_table);
5555                 item->flags_unset_table = NULL;
5556         }
5557         if (item->tags_set_table) {
5558                 g_hash_table_foreach_remove(item->tags_set_table, process_tags, GINT_TO_POINTER(TRUE));
5559                 g_hash_table_destroy(item->tags_set_table);
5560                 item->tags_set_table = NULL;
5561         }
5562         if (item->tags_unset_table) {
5563                 g_hash_table_foreach_remove(item->tags_unset_table, process_tags, GINT_TO_POINTER(FALSE));
5564                 g_hash_table_destroy(item->tags_unset_table);
5565                 item->tags_unset_table = NULL;
5566         }
5567
5568 }
5569
5570 static void imap_set_batch (Folder *folder, FolderItem *_item, gboolean batch)
5571 {
5572         IMAPFolderItem *item = (IMAPFolderItem *)_item;
5573         IMAPSession *session;
5574
5575         g_return_if_fail(item != NULL);
5576
5577         if (item->batching == batch)
5578                 return;
5579
5580         if (batch) {
5581                 item->batching = TRUE;
5582                 debug_print("IMAP switching to batch mode\n");
5583                 if (!item->flags_set_table) {
5584                         item->flags_set_table = g_hash_table_new(NULL, g_direct_equal);
5585                 }
5586                 if (!item->flags_unset_table) {
5587                         item->flags_unset_table = g_hash_table_new(NULL, g_direct_equal);
5588                 }
5589                 if (!item->tags_set_table) {
5590                         item->tags_set_table = g_hash_table_new(NULL, g_direct_equal);
5591                 }
5592                 if (!item->tags_unset_table) {
5593                         item->tags_unset_table = g_hash_table_new(NULL, g_direct_equal);
5594                 }
5595                 session = imap_session_get(folder);
5596                 if (session) {
5597                         imap_refresh_sensitivity(session);
5598                         session->sens_update_block = TRUE;
5599                 }
5600         } else {
5601                 debug_print("IMAP switching away from batch mode\n");
5602                 /* process stuff */
5603                 process_hashtable(item);
5604                 item->batching = FALSE;
5605                 session = imap_session_get(folder);
5606                 if (session) {
5607                         session->sens_update_block = FALSE;
5608                         imap_refresh_sensitivity(session);
5609                 }
5610         }
5611 }
5612
5613
5614
5615 /* data types conversion libetpan <-> claws */
5616
5617
5618
5619 #define ETPAN_IMAP_MB_MARKED      1
5620 #define ETPAN_IMAP_MB_UNMARKED    2
5621 #define ETPAN_IMAP_MB_NOSELECT    4
5622 #define ETPAN_IMAP_MB_NOINFERIORS 8
5623
5624 static int imap_flags_to_flags(struct mailimap_mbx_list_flags * imap_flags)
5625 {
5626   int flags;
5627   clistiter * cur;
5628
5629   flags = 0;
5630   if (imap_flags->mbf_type == MAILIMAP_MBX_LIST_FLAGS_SFLAG) {
5631     switch (imap_flags->mbf_sflag) {
5632     case MAILIMAP_MBX_LIST_SFLAG_MARKED:
5633       flags |= ETPAN_IMAP_MB_MARKED;
5634       break;
5635     case MAILIMAP_MBX_LIST_SFLAG_NOSELECT:
5636       flags |= ETPAN_IMAP_MB_NOSELECT;
5637       break;
5638     case MAILIMAP_MBX_LIST_SFLAG_UNMARKED:
5639       flags |= ETPAN_IMAP_MB_UNMARKED;
5640       break;
5641     }
5642   }
5643
5644   if (imap_flags->mbf_oflags) {
5645     for(cur = clist_begin(imap_flags->mbf_oflags) ; cur != NULL ;
5646         cur = clist_next(cur)) {
5647       struct mailimap_mbx_list_oflag * oflag;
5648
5649       oflag = clist_content(cur);
5650
5651       switch (oflag->of_type) {
5652       case MAILIMAP_MBX_LIST_OFLAG_NOINFERIORS:
5653         flags |= ETPAN_IMAP_MB_NOINFERIORS;
5654         break;
5655       }
5656     }
5657   }
5658   return flags;
5659 }
5660
5661 static GSList * imap_list_from_lep(IMAPFolder * folder,
5662                                    clist * list, const gchar * real_path, gboolean all)
5663 {
5664         clistiter * iter;
5665         GSList * item_list = NULL, *llast = NULL;
5666
5667         if (list) {
5668                 for(iter = clist_begin(list) ; iter != NULL ;
5669                     iter = clist_next(iter)) {
5670                         struct mailimap_mailbox_list * mb;
5671                         int flags;
5672                         char delimiter;
5673                         char * name;
5674                         char * dup_name;
5675                         gchar * base;
5676                         gchar * loc_name;
5677                         gchar * loc_path;
5678                         FolderItem *new_item;
5679
5680                         mb = clist_content(iter);
5681
5682                         if (mb == NULL)
5683                                 continue;
5684
5685                         flags = 0;
5686                         if (mb->mb_flag != NULL)
5687                                 flags = imap_flags_to_flags(mb->mb_flag);
5688
5689                         delimiter = mb->mb_delimiter;
5690                         name = mb->mb_name;
5691
5692                         dup_name = strdup(name);
5693                         if (delimiter != '\0')
5694                                 subst_char(dup_name, delimiter, '/');
5695
5696                         base = g_path_get_basename(dup_name);
5697                         if (base[0] == '.') {
5698                                 g_free(base);
5699                                 free(dup_name);
5700                                 continue;
5701                         }
5702                         if (!all && path_cmp(name, real_path) == 0) {
5703                                 g_free(base);
5704                                 free(dup_name);
5705                                 continue;
5706                         }
5707
5708                         if (!all && dup_name[strlen(dup_name)-1] == '/') {
5709                                 g_free(base);
5710                                 free(dup_name);
5711                                 continue;
5712                         }
5713
5714                         loc_name = imap_modified_utf7_to_utf8(base, FALSE);
5715                         loc_path = imap_modified_utf7_to_utf8(dup_name, FALSE);
5716
5717                         new_item = folder_item_new(FOLDER(folder), loc_name, loc_path);
5718                         if ((flags & ETPAN_IMAP_MB_NOINFERIORS) != 0)
5719                                 new_item->no_sub = TRUE;
5720                         if (strcasecmp(dup_name, "INBOX") != 0 &&
5721                             ((flags & ETPAN_IMAP_MB_NOSELECT) != 0))
5722                                 new_item->no_select = TRUE;
5723
5724                         if (item_list == NULL)
5725                                 llast = item_list = g_slist_append(item_list, new_item);
5726                         else {
5727                                 llast = g_slist_append(llast, new_item);
5728                                 llast = llast->next;
5729                         }
5730                         debug_print("folder '%s' found.\n", loc_path);
5731                         g_free(base);
5732                         g_free(loc_path);
5733                         g_free(loc_name);
5734
5735                         free(dup_name);
5736                 }
5737         }
5738         return item_list;
5739 }
5740
5741 static GSList * imap_get_lep_set_from_numlist(IMAPFolder *folder, MsgNumberList *numlist)
5742 {
5743         GSList *sorted_list, *cur;
5744         guint first, last, next;
5745         GSList *ret_list = NULL, *llast = NULL;
5746         struct mailimap_set * current_set;
5747         unsigned int item_count;
5748
5749         if (numlist == NULL)
5750                 return NULL;
5751
5752         current_set = mailimap_set_new_empty();
5753
5754         sorted_list = g_slist_copy(numlist);
5755         sorted_list = g_slist_sort(sorted_list, g_int_compare);
5756
5757         first = GPOINTER_TO_INT(sorted_list->data);
5758
5759         item_count = 0;
5760         for (cur = sorted_list; cur != NULL; cur = g_slist_next(cur)) {
5761                 if (GPOINTER_TO_INT(cur->data) == 0)
5762                         continue;
5763
5764                 item_count ++;
5765
5766                 last = GPOINTER_TO_INT(cur->data);
5767                 if (cur->next)
5768                         next = GPOINTER_TO_INT(cur->next->data);
5769                 else
5770                         next = 0;
5771
5772                 if (last + 1 != next || next == 0 || item_count >= folder->max_set_size) {
5773
5774                         struct mailimap_set_item * item;
5775                         item = mailimap_set_item_new(first, last);
5776                         mailimap_set_add(current_set, item);
5777
5778                         first = next;
5779
5780                         if (item_count >= folder->max_set_size) {
5781                                 if (ret_list == NULL)
5782                                         llast = ret_list = g_slist_append(ret_list,
5783                                                           current_set);
5784                                 else {
5785                                         llast = g_slist_append(llast, current_set);
5786                                         llast = llast->next;
5787                                 }
5788
5789                                 current_set = mailimap_set_new_empty();
5790                                 item_count = 0;
5791                         }
5792                 }
5793         }
5794
5795         if (clist_count(current_set->set_list) > 0) {
5796                 ret_list = g_slist_append(ret_list,
5797                                           current_set);
5798         }
5799
5800         g_slist_free(sorted_list);
5801
5802         return ret_list;
5803 }
5804
5805 static GSList * imap_get_lep_set_from_msglist(IMAPFolder *folder, MsgInfoList *msglist)
5806 {
5807         MsgNumberList *numlist = NULL;
5808         GSList *seq_list;
5809
5810         numlist = procmsg_get_number_list_for_msgs(msglist);
5811
5812         seq_list = imap_get_lep_set_from_numlist(folder, numlist);
5813         g_slist_free(numlist);
5814
5815         return seq_list;
5816 }
5817
5818 static GSList * imap_uid_list_from_lep(clist * list, gint* length)
5819 {
5820         clistiter * iter;
5821         GSList * result;
5822         gint len = 0;
5823
5824         result = NULL;
5825
5826         if (list) {
5827                 for(iter = clist_begin(list) ; iter != NULL ;
5828                     iter = clist_next(iter)) {
5829                         uint32_t * puid;
5830
5831                         puid = clist_content(iter);
5832                         result = g_slist_prepend(result, GINT_TO_POINTER(* puid));
5833                         len++;
5834                 }
5835                 result = g_slist_reverse(result);
5836         }
5837         if (length)
5838                 *length = len;
5839         return result;
5840 }
5841
5842 static GSList * imap_uid_list_from_lep_tab(carray * list)
5843 {
5844         unsigned int i;
5845         GSList * result;
5846
5847         result = NULL;
5848
5849         for(i = 0 ; i < carray_count(list) ; i ++) {
5850                 uint32_t * puid;
5851
5852                 puid = carray_get(list, i);
5853                 result = g_slist_prepend(result, GINT_TO_POINTER(* puid));
5854         }
5855         result = g_slist_reverse(result);
5856         return result;
5857 }
5858
5859 static void imap_flags_hash_from_lep_uid_flags_tab(carray * list,
5860                                                    GHashTable * hash,
5861                                                    GHashTable * tags_hash)
5862 {
5863         unsigned int i;
5864
5865         for(i = 0 ; i < carray_count(list) ; i += 3) {
5866                 uint32_t * puid;
5867                 int * pflags;
5868                 GSList *tags;
5869
5870                 puid = carray_get(list, i);
5871                 pflags = carray_get(list, i + 1);
5872                 tags = carray_get(list, i + 2);
5873
5874                 g_hash_table_insert(hash, GINT_TO_POINTER(*puid), GINT_TO_POINTER(* pflags));
5875                 g_hash_table_insert(tags_hash, GINT_TO_POINTER(*puid), tags);
5876         }
5877 }
5878
5879 static MsgInfo *imap_envelope_from_lep(struct imap_fetch_env_info * info,
5880                                        FolderItem *item)
5881 {
5882         MsgInfo *msginfo = NULL;
5883         guint32 uid = 0;
5884         goffset size = 0;
5885         MsgFlags flags = {0, 0};
5886
5887         if (info->headers == NULL)
5888                 return NULL;
5889
5890         MSG_SET_TMP_FLAGS(flags, MSG_IMAP);
5891         if (folder_has_parent_of_type(item, F_QUEUE)) {
5892                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
5893         } else if (folder_has_parent_of_type(item, F_DRAFT)) {
5894                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
5895         }
5896         flags.perm_flags = info->flags;
5897
5898         uid = info->uid;
5899         size = (goffset) info->size;
5900         msginfo = procheader_parse_str(info->headers, flags, FALSE, FALSE);
5901
5902         if (msginfo) {
5903                 msginfo->msgnum = uid;
5904                 msginfo->size = size;
5905         }
5906
5907         return msginfo;
5908 }
5909
5910 static void imap_lep_set_free(GSList *seq_list)
5911 {
5912         GSList * cur;
5913
5914         for(cur = seq_list ; cur != NULL ; cur = g_slist_next(cur)) {
5915                 struct mailimap_set * imapset;
5916
5917                 imapset = cur->data;
5918                 mailimap_set_free(imapset);
5919         }
5920         g_slist_free(seq_list);
5921 }
5922
5923 static struct mailimap_flag_list * imap_flag_to_lep(IMAPFolderItem *item, IMAPFlags flags, GSList *tags)
5924 {
5925         struct mailimap_flag_list * flag_list;
5926         GSList *cur = tags;
5927
5928         flag_list = mailimap_flag_list_new_empty();
5929
5930         if (IMAP_IS_SEEN(flags))
5931                 mailimap_flag_list_add(flag_list,
5932                                        mailimap_flag_new_seen());
5933         if (IMAP_IS_ANSWERED(flags))
5934                 mailimap_flag_list_add(flag_list,
5935                                        mailimap_flag_new_answered());
5936         if (IMAP_IS_FLAGGED(flags))
5937                 mailimap_flag_list_add(flag_list,
5938                                        mailimap_flag_new_flagged());
5939         if (IMAP_IS_DELETED(flags))
5940                 mailimap_flag_list_add(flag_list,
5941                                        mailimap_flag_new_deleted());
5942         if (IMAP_IS_DRAFT(flags))
5943                 mailimap_flag_list_add(flag_list,
5944                                        mailimap_flag_new_draft());
5945         if (IMAP_IS_FORWARDED(flags) && flag_ok(item, IMAP_FLAG_FORWARDED))
5946                 mailimap_flag_list_add(flag_list,
5947                                        mailimap_flag_new_flag_keyword(strdup(RTAG_FORWARDED)));
5948         if (IMAP_IS_SPAM(flags) && flag_ok(item, IMAP_FLAG_SPAM))
5949                 mailimap_flag_list_add(flag_list,
5950                                        mailimap_flag_new_flag_keyword(strdup(RTAG_JUNK)));
5951         else if (IMAP_IS_HAM(flags) && flag_ok(item, IMAP_FLAG_HAM))
5952                 mailimap_flag_list_add(flag_list,
5953                                        mailimap_flag_new_flag_keyword(strdup(RTAG_NON_JUNK)));
5954
5955         for (; cur; cur = cur->next) {
5956                 gchar *enc_str =
5957                         imap_utf8_to_modified_utf7(cur->data, TRUE);
5958                 g_strstrip(enc_str);
5959
5960                 mailimap_flag_list_add(flag_list,
5961                         mailimap_flag_new_flag_keyword(enc_str));
5962         }
5963
5964         return flag_list;
5965 }
5966
5967 guint imap_folder_get_refcnt(Folder *folder)
5968 {
5969         return ((IMAPFolder *)folder)->refcnt;
5970 }
5971
5972 void imap_folder_ref(Folder *folder)
5973 {
5974         ((IMAPFolder *)folder)->refcnt++;
5975 }
5976
5977 void imap_disconnect_all(gboolean have_connectivity)
5978 {
5979         GList *list;
5980         gboolean short_timeout;
5981 #ifdef HAVE_NETWORKMANAGER_SUPPORT
5982         GError *error = NULL;
5983
5984         short_timeout = !networkmanager_is_online(&error);
5985         if(error) {
5986                 short_timeout = TRUE;
5987                 g_error_free(error);
5988         }
5989 #else
5990         short_timeout = TRUE;
5991 #endif
5992
5993         if(short_timeout)
5994                 imap_main_set_timeout(1);
5995
5996         for (list = account_get_list(); list != NULL; list = list->next) {
5997                 PrefsAccount *account = list->data;
5998                 if (account->protocol == A_IMAP4) {
5999                         RemoteFolder *folder = (RemoteFolder *)account->folder;
6000                         if (folder && folder->session) {
6001                                 if (imap_is_busy(FOLDER(folder)))
6002                                         imap_threaded_cancel(FOLDER(folder));
6003
6004                                 IMAPSession *session = (IMAPSession *)folder->session;
6005                                 if (have_connectivity)
6006                                         imap_threaded_disconnect(FOLDER(folder));
6007                                 SESSION(session)->state = SESSION_DISCONNECTED;
6008                                 SESSION(session)->sock = NULL;
6009                                 imap_safe_destroy(session);
6010                                 folder->session = NULL;
6011                         }
6012                 }
6013         }
6014
6015         if(short_timeout)
6016                 imap_main_set_timeout(prefs_common.io_timeout_secs);
6017 }
6018
6019 void imap_folder_unref(Folder *folder)
6020 {
6021         if (((IMAPFolder *)folder)->refcnt > 0)
6022                 ((IMAPFolder *)folder)->refcnt--;
6023 }
6024
6025 void imap_cancel_all(void)
6026 {
6027         GList *folderlist;
6028         GList *cur;
6029
6030         folderlist = folder_get_list();
6031         for (cur = folderlist; cur != NULL; cur = g_list_next(cur)) {
6032                 Folder *folder = (Folder *) cur->data;
6033
6034                 if (folder->klass == &imap_class) {
6035                         if (imap_is_busy(folder)) {
6036                                 IMAPSession *imap_session;
6037                                 RemoteFolder *rfolder;
6038
6039                                 g_printerr("cancelled\n");
6040                                 imap_threaded_cancel(folder);
6041                                 rfolder = (RemoteFolder *) folder;
6042                                 imap_session = (IMAPSession *) rfolder->session;
6043                                 if (imap_session)
6044                                         imap_session->cancelled = 1;
6045                         }
6046                 }
6047         }
6048 }
6049
6050 gboolean imap_cancel_all_enabled(void)
6051 {
6052         GList *folderlist;
6053         GList *cur;
6054
6055         folderlist = folder_get_list();
6056         for (cur = folderlist; cur != NULL; cur = g_list_next(cur)) {
6057                 Folder *folder = (Folder *) cur->data;
6058
6059                 if (folder->klass == &imap_class) {
6060                         if (imap_is_busy(folder)) {
6061                                 return TRUE;
6062                         }
6063                 }
6064         }
6065
6066         return FALSE;
6067 }
6068
6069 static gboolean imap_is_busy(Folder *folder)
6070 {
6071         IMAPSession *imap_session;
6072         RemoteFolder *rfolder;
6073
6074         rfolder = (RemoteFolder *) folder;
6075         imap_session = (IMAPSession *) rfolder->session;
6076         if (imap_session == NULL)
6077                 return FALSE;
6078
6079         return imap_session->busy;
6080 }
6081
6082 #else /* HAVE_LIBETPAN */
6083
6084 static FolderClass imap_class;
6085
6086 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item);
6087 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag);
6088
6089 static Folder   *imap_folder_new        (const gchar    *name,
6090                                          const gchar    *path)
6091 {
6092         static gboolean missing_imap_warning = TRUE;
6093         if (missing_imap_warning) {
6094                 missing_imap_warning = FALSE;
6095                 alertpanel_error(
6096                         _("You have one or more IMAP accounts "
6097                           "defined. However this version of "
6098                           "Claws Mail has been built without "
6099                           "IMAP support; your IMAP accounts are "
6100                           "disabled.\n\n"
6101                           "You probably need to "
6102                           "install libetpan and recompile "
6103                           "Claws Mail."));
6104         }
6105         return NULL;
6106 }
6107 static gint     imap_create_tree        (Folder         *folder)
6108 {
6109         return -1;
6110 }
6111 static FolderItem *imap_create_folder   (Folder         *folder,
6112                                          FolderItem     *parent,
6113                                          const gchar    *name)
6114 {
6115         return NULL;
6116 }
6117 static gint     imap_rename_folder      (Folder         *folder,
6118                                          FolderItem     *item,
6119                                          const gchar    *name)
6120 {
6121         return -1;
6122 }
6123
6124 gchar imap_get_path_separator_for_item(FolderItem *item)
6125 {
6126         return '/';
6127 }
6128
6129 FolderClass *imap_get_class(void)
6130 {
6131         if (imap_class.idstr == NULL) {
6132                 imap_class.type = F_IMAP;
6133                 imap_class.idstr = "imap";
6134                 imap_class.uistr = "IMAP";
6135
6136                 imap_class.new_folder = imap_folder_new;
6137                 imap_class.create_tree = imap_create_tree;
6138                 imap_class.create_folder = imap_create_folder;
6139                 imap_class.rename_folder = imap_rename_folder;
6140
6141                 imap_class.set_xml = folder_set_xml;
6142                 imap_class.get_xml = folder_get_xml;
6143                 imap_class.item_set_xml = imap_item_set_xml;
6144                 imap_class.item_get_xml = imap_item_get_xml;
6145                 /* nothing implemented */
6146         }
6147
6148         return &imap_class;
6149 }
6150
6151 void imap_disconnect_all(gboolean have_connectivity)
6152 {
6153 }
6154
6155 gint imap_subscribe(Folder *folder, FolderItem *item, gchar *rpath, gboolean sub)
6156 {
6157         return -1;
6158 }
6159
6160 GList * imap_scan_subtree(Folder *folder, FolderItem *item, gboolean unsubs_only, gboolean recursive)
6161 {
6162         return NULL;
6163 }
6164
6165 void imap_cache_msg(FolderItem *item, gint msgnum)
6166 {
6167 }
6168
6169 void imap_cancel_all(void)
6170 {
6171 }
6172
6173 gboolean imap_cancel_all_enabled(void)
6174 {
6175         return FALSE;
6176 }
6177
6178 #endif
6179
6180 #ifdef HAVE_LIBETPAN
6181 static void imap_synchronise(FolderItem *item, gint days)
6182 {
6183         if (IMAP_FOLDER_ITEM(item)->last_sync == IMAP_FOLDER_ITEM(item)->last_change) {
6184                 debug_print("%s already synced\n", item->path?item->path:item->name);
6185                 return;
6186         }
6187         debug_print("syncing %s\n", item->path?item->path:item->name);
6188         imap_gtk_synchronise(item, days);
6189         IMAP_FOLDER_ITEM(item)->last_sync = IMAP_FOLDER_ITEM(item)->last_change;
6190 }
6191 #endif
6192
6193 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag)
6194 {
6195 #ifdef HAVE_LIBETPAN
6196         GList *cur;
6197 #endif
6198         folder_item_set_xml(folder, item, tag);
6199
6200 #ifdef HAVE_LIBETPAN
6201         for (cur = tag->attr; cur != NULL; cur = g_list_next(cur)) {
6202                 XMLAttr *attr = (XMLAttr *) cur->data;
6203
6204                 if (!attr || !attr->name || !attr->value) continue;
6205                 if (!strcmp(attr->name, "uidnext"))
6206                         IMAP_FOLDER_ITEM(item)->uid_next = atoi(attr->value);
6207                 if (!strcmp(attr->name, "last_sync"))
6208                         IMAP_FOLDER_ITEM(item)->last_sync = atoi(attr->value);
6209                 if (!strcmp(attr->name, "last_change"))
6210                         IMAP_FOLDER_ITEM(item)->last_change = atoi(attr->value);
6211         }
6212         if (IMAP_FOLDER_ITEM(item)->last_change == 0)
6213                 IMAP_FOLDER_ITEM(item)->last_change = time(NULL);
6214 #endif
6215 }
6216
6217 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item)
6218 {
6219         XMLTag *tag;
6220
6221         tag = folder_item_get_xml(folder, item);
6222
6223 #ifdef HAVE_LIBETPAN
6224         xml_tag_add_attr(tag, xml_attr_new_int("uidnext",
6225                         IMAP_FOLDER_ITEM(item)->uid_next));
6226         xml_tag_add_attr(tag, xml_attr_new_int("last_sync",
6227                         IMAP_FOLDER_ITEM(item)->last_sync));
6228         xml_tag_add_attr(tag, xml_attr_new_int("last_change",
6229                         IMAP_FOLDER_ITEM(item)->last_change));
6230
6231 #endif
6232         return tag;
6233 }
6234
6235 /* ===================================================================
6236  * UTF-7 conversion routines as in RFC 2192
6237  * ===================================================================
6238  * These two functions from:
6239  * libimap library.
6240  * Copyright (C) 2003-2004 Pawel Salek. */
6241
6242 /* UTF7 modified base64 alphabet */
6243 static char base64chars[] =
6244   "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+,";
6245 #define UNDEFINED 64
6246
6247 /* UTF16 definitions */
6248 #define UTF16MASK       0x03FFUL
6249 #define UTF16SHIFT      10
6250 #define UTF16BASE       0x10000UL
6251 #define UTF16HIGHSTART  0xD800UL
6252 #define UTF16HIGHEND    0xDBFFUL
6253 #define UTF16LOSTART    0xDC00UL
6254 #define UTF16LOEND      0xDFFFUL
6255
6256
6257 /* Convert an IMAP mailbox to a UTF-8 string.
6258  *  dst needs to have roughly 4 times the storage space of src
6259  *    Hex encoding can triple the size of the input
6260  *    UTF-7 can be slightly denser than UTF-8
6261  *     (worst case: 8 octets UTF-7 becomes 9 octets UTF-8)
6262  */
6263 char* imap_modified_utf7_to_utf8(const char *mbox, gboolean change_spaces)
6264 {
6265   unsigned c, i, bitcount;
6266   unsigned long ucs4, utf16, bitbuf;
6267   unsigned char base64[256];
6268   const char *src;
6269   char *dst, *res  = g_malloc(2*strlen(mbox)+1);
6270
6271   dst = res;
6272   src = mbox;
6273   if(!dst) return NULL;
6274   /* initialize modified base64 decoding table */
6275   memset(base64, UNDEFINED, sizeof (base64));
6276   for (i = 0; i < sizeof (base64chars); ++i) {
6277     base64[(unsigned)base64chars[i]] = i;
6278   }
6279
6280   /* loop until end of string */
6281   while (*src != '\0') {
6282     c = *src++;
6283     /* deal with literal characters and &- */
6284     if (c != '&' || *src == '-') {
6285       /* encode literally */
6286       if (change_spaces && c == '_')
6287         *dst++ = ' ';
6288       else
6289         *dst++ = c;
6290       /* skip over the '-' if this is an &- sequence */
6291       if (c == '&') ++src;
6292     } else {
6293       /* convert modified UTF-7 -> UTF-16 -> UCS-4 -> UTF-8 -> HEX */
6294       bitbuf = 0;
6295       bitcount = 0;
6296       ucs4 = 0;
6297       while ((c = base64[(unsigned char) *src]) != UNDEFINED) {
6298         ++src;
6299         bitbuf = (bitbuf << 6) | c;
6300         bitcount += 6;
6301         /* enough bits for a UTF-16 character? */
6302         if (bitcount >= 16) {
6303           bitcount -= 16;
6304           utf16 = (bitcount ? bitbuf >> bitcount
6305                    : bitbuf) & 0xffff;
6306           /* convert UTF16 to UCS4 */
6307           if
6308             (utf16 >= UTF16HIGHSTART && utf16 <= UTF16HIGHEND) {
6309             ucs4 = (utf16 - UTF16HIGHSTART) << UTF16SHIFT;
6310             continue;
6311           } else if
6312             (utf16 >= UTF16LOSTART && utf16 <= UTF16LOEND) {
6313             ucs4 += utf16 - UTF16LOSTART + UTF16BASE;
6314           } else {
6315             ucs4 = utf16;
6316           }
6317
6318           /* convert UTF-16 range of UCS4 to UTF-8 */
6319           if (ucs4 <= 0x7fUL) {
6320             dst[0] = ucs4;
6321             dst += 1;
6322           } else if (ucs4 <= 0x7ffUL) {
6323             dst[0] = 0xc0 | (ucs4 >> 6);
6324             dst[1] = 0x80 | (ucs4 & 0x3f);
6325             dst += 2;
6326           } else if (ucs4 <= 0xffffUL) {
6327             dst[0] = 0xe0 | (ucs4 >> 12);
6328             dst[1] = 0x80 | ((ucs4 >> 6) & 0x3f);
6329             dst[2] = 0x80 | (ucs4 & 0x3f);
6330             dst += 3;
6331           } else {
6332             dst[0] = 0xf0 | (ucs4 >> 18);
6333             dst[1] = 0x80 | ((ucs4 >> 12) & 0x3f);
6334             dst[2] = 0x80 | ((ucs4 >> 6) & 0x3f);
6335             dst[3] = 0x80 | (ucs4 & 0x3f);
6336             dst += 4;
6337           }
6338         }
6339       }
6340       /* skip over trailing '-' in modified UTF-7 encoding */
6341       if (*src == '-') ++src;
6342     }
6343   }
6344   /* terminate destination string */
6345   *dst = '\0';
6346   return res;
6347 }
6348
6349 /* Convert hex coded UTF-8 string to modified UTF-7 IMAP mailbox
6350  *  dst should be about twice the length of src to deal with non-hex
6351  *  coded URLs
6352  */
6353 char* imap_utf8_to_modified_utf7(const char *src, gboolean change_spaces)
6354 {
6355   unsigned int utf8pos, utf8total, c, utf7mode, bitstogo, utf16flag;
6356   unsigned long ucs4 = 0, bitbuf = 0;
6357
6358   /* initialize hex lookup table */
6359   char *dst, *res;
6360
6361   if (!src) return NULL;
6362
6363   res = malloc(2*strlen(src)+1);
6364   dst = res;
6365   if(!dst) return NULL;
6366
6367   utf7mode = 0;
6368   utf8total = 0;
6369   bitstogo = 0;
6370   utf8pos = 0;
6371   while ((c = (unsigned char)*src) != '\0') {
6372     ++src;
6373     /* normal character? */
6374     if (c >= ' ' && c <= '~' && (c != '_' || !change_spaces)) {
6375       /* switch out of UTF-7 mode */
6376       if (utf7mode) {
6377         if (bitstogo) {
6378           *dst++ = base64chars[(bitbuf << (6 - bitstogo)) & 0x3F];
6379         }
6380         *dst++ = '-';
6381         utf7mode = 0;
6382         utf8pos  = 0;
6383         bitstogo = 0;
6384         utf8total= 0;
6385       }
6386       if (change_spaces && c == ' ')
6387         *dst++ = '_';
6388       else
6389         *dst++ = c;
6390       /* encode '&' as '&-' */
6391       if (c == '&') {
6392         *dst++ = '-';
6393       }
6394       continue;
6395     }
6396     /* switch to UTF-7 mode */
6397     if (!utf7mode) {
6398       *dst++ = '&';
6399       utf7mode = 1;
6400     }
6401     /* Encode US-ASCII characters as themselves */
6402     if (c < 0x80) {
6403       ucs4 = c;
6404     } else if (utf8total) {
6405       /* save UTF8 bits into UCS4 */
6406       ucs4 = (ucs4 << 6) | (c & 0x3FUL);
6407       if (++utf8pos < utf8total) {
6408         continue;
6409       }
6410     } else {
6411       utf8pos = 1;
6412       if (c < 0xE0) {
6413         utf8total = 2;
6414         ucs4 = c & 0x1F;
6415       } else if (c < 0xF0) {
6416         utf8total = 3;
6417         ucs4 = c & 0x0F;
6418       } else {
6419         /* NOTE: can't convert UTF8 sequences longer than 4 */
6420         utf8total = 4;
6421         ucs4 = c & 0x03;
6422       }
6423       continue;
6424     }
6425     /* loop to split ucs4 into two utf16 chars if necessary */
6426     utf8total = 0;
6427     do {
6428       if (ucs4 >= UTF16BASE) {
6429         ucs4 -= UTF16BASE;
6430         bitbuf = (bitbuf << 16) | ((ucs4 >> UTF16SHIFT)
6431                                    + UTF16HIGHSTART);
6432         ucs4 = (ucs4 & UTF16MASK) + UTF16LOSTART;
6433         utf16flag = 1;
6434       } else {
6435         bitbuf = (bitbuf << 16) | ucs4;
6436         utf16flag = 0;
6437       }
6438       bitstogo += 16;
6439       /* spew out base64 */
6440       while (bitstogo >= 6) {
6441         bitstogo -= 6;
6442         *dst++ = base64chars[(bitstogo ? (bitbuf >> bitstogo)
6443                               : bitbuf)
6444                              & 0x3F];
6445       }
6446     } while (utf16flag);
6447   }
6448   /* if in UTF-7 mode, finish in ASCII */
6449   if (utf7mode) {
6450     if (bitstogo) {
6451       *dst++ = base64chars[(bitbuf << (6 - bitstogo)) & 0x3F];
6452     }
6453     *dst++ = '-';
6454   }
6455   /* tie off string */
6456   *dst = '\0';
6457   return res;
6458 }