src/imap.c

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