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