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
  75 typedef struct _IMAPFolder      IMAPFolder;
  76 typedef struct _IMAPSession     IMAPSession;
  77 typedef struct _IMAPNameSpace   IMAPNameSpace;
  78 typedef struct _IMAPFolderItem  IMAPFolderItem;
  79
  80 #define IMAP_FOLDER(obj)        ((IMAPFolder *)obj)
  81 #define IMAP_FOLDER_ITEM(obj)   ((IMAPFolderItem *)obj)
  82 #define IMAP_SESSION(obj)       ((IMAPSession *)obj)
  83
  84 struct _IMAPFolder
  85 {
  86         RemoteFolder rfolder;
  87
  88         /* list of IMAPNameSpace */
  89         GList *ns_personal;
  90         GList *ns_others;
  91         GList *ns_shared;
  92         gchar last_seen_separator;
  93         guint refcnt;
  94         guint max_set_size;
  95         gchar *search_charset;
  96         gboolean search_charset_supported;
  97 };
  98
  99 struct _IMAPSession
 100 {
 101         Session session;
 102
 103         gboolean authenticated;
 104
 105         GSList *capability;
 106         gboolean uidplus;
 107
 108         gchar *mbox;
 109         guint cmd_count;
 110
 111         /* CLAWS */
 112         gboolean folder_content_changed;
 113         guint exists;
 114         guint recent;
 115         guint expunge;
 116         guint unseen;
 117         guint uid_validity;
 118         guint uid_next;
 119
 120         Folder * folder;
 121         gboolean busy;
 122         gboolean cancelled;
 123         gboolean sens_update_block;
 124         gboolean do_destroy;
 125 };
 126
 127 struct _IMAPNameSpace
 128 {
 129         gchar *name;
 130         gchar separator;
 131 };
 132
 133 #define IMAPBUFSIZE     8192
 134
 135 #define IMAP_IS_SEEN(flags)     ((flags & IMAP_FLAG_SEEN) != 0)
 136 #define IMAP_IS_ANSWERED(flags) ((flags & IMAP_FLAG_ANSWERED) != 0)
 137 #define IMAP_IS_FLAGGED(flags)  ((flags & IMAP_FLAG_FLAGGED) != 0)
 138 #define IMAP_IS_DELETED(flags)  ((flags & IMAP_FLAG_DELETED) != 0)
 139 #define IMAP_IS_DRAFT(flags)    ((flags & IMAP_FLAG_DRAFT) != 0)
 140 #define IMAP_IS_FORWARDED(flags)        ((flags & IMAP_FLAG_FORWARDED) != 0)
 141 #define IMAP_IS_SPAM(flags)     ((flags & IMAP_FLAG_SPAM) != 0)
 142 #define IMAP_IS_HAM(flags)      ((flags & IMAP_FLAG_HAM) != 0)
 143
 144
 145 #define IMAP4_PORT      143
 146 #ifdef USE_GNUTLS
 147 #define IMAPS_PORT      993
 148 #endif
 149
 150 #define IMAP_CMD_LIMIT  1000
 151
 152 enum {
 153         ITEM_CAN_CREATE_FLAGS_UNKNOWN = 0,
 154         ITEM_CAN_CREATE_FLAGS,
 155         ITEM_CANNOT_CREATE_FLAGS
 156 };
 157
 158 struct _IMAPFolderItem
 159 {
 160         FolderItem item;
 161
 162         guint lastuid;
 163         guint uid_next;
 164         GSList *uid_list;
 165         gboolean batching;
 166
 167         GHashTable *flags_set_table;
 168         GHashTable *flags_unset_table;
 169         guint32 last_change;
 170         guint32 last_sync;
 171         gboolean should_update;
 172         gboolean should_trash_cache;
 173         gint can_create_flags;
 174
 175         GHashTable *tags_set_table;
 176         GHashTable *tags_unset_table;
 177         GSList *ok_flags;
 178
 179 };
 180
 181 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item);
 182 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag);
 183
 184 static void imap_folder_init            (Folder         *folder,
 185                                          const gchar    *name,
 186                                          const gchar    *path);
 187
 188 static Folder   *imap_folder_new        (const gchar    *name,
 189                                          const gchar    *path);
 190 static void      imap_folder_destroy    (Folder         *folder);
 191
 192 static IMAPSession *imap_session_new    (Folder         *folder,
 193                                          const PrefsAccount     *account);
 194 static gint     imap_session_authenticate(IMAPSession   *session,
 195                                           PrefsAccount  *account);
 196 static void     imap_session_destroy    (Session        *session);
 197
 198 static gchar   *imap_fetch_msg          (Folder         *folder,
 199                                          FolderItem     *item,
 200                                          gint            uid);
 201 static gchar   *imap_fetch_msg_full     (Folder         *folder,
 202                                          FolderItem     *item,
 203                                          gint            uid,
 204                                          gboolean        headers,
 205                                          gboolean        body);
 206 static void     imap_remove_cached_msg  (Folder         *folder,
 207                                          FolderItem     *item,
 208                                          MsgInfo        *msginfo);
 209 static gint     imap_add_msg            (Folder         *folder,
 210                                          FolderItem     *dest,
 211                                          const gchar    *file,
 212                                          MsgFlags       *flags);
 213 static gint     imap_add_msgs           (Folder         *folder,
 214                                          FolderItem     *dest,
 215                                          GSList         *file_list,
 216                                          GHashTable     *relation);
 217
 218 static gint     imap_copy_msg           (Folder         *folder,
 219                                          FolderItem     *dest,
 220                                          MsgInfo        *msginfo);
 221 static gint     imap_copy_msgs          (Folder         *folder,
 222                                          FolderItem     *dest,
 223                                          MsgInfoList    *msglist,
 224                                          GHashTable     *relation);
 225
 226 static gint     search_msgs             (Folder                 *folder,
 227                                          FolderItem             *container,
 228                                          MsgNumberList          **msgs,
 229                                          gboolean               *on_server,
 230                                          MatcherList            *predicate,
 231                                          SearchProgressNotify   progress_cb,
 232                                          gpointer               progress_data);
 233
 234 static gint     imap_remove_msg         (Folder         *folder,
 235                                          FolderItem     *item,
 236                                          gint            uid);
 237 static gint     imap_remove_msgs        (Folder         *folder,
 238                                          FolderItem     *dest,
 239                                          MsgInfoList    *msglist,
 240                                          GHashTable     *relation);
 241 static gint     imap_expunge            (Folder         *folder,
 242                                          FolderItem     *dest);
 243 static gint     imap_remove_all_msg     (Folder         *folder,
 244                                          FolderItem     *item);
 245
 246 static gboolean imap_is_msg_changed     (Folder         *folder,
 247                                          FolderItem     *item,
 248                                          MsgInfo        *msginfo);
 249
 250 static gint     imap_close              (Folder         *folder,
 251                                          FolderItem     *item);
 252
 253 static gint     imap_scan_tree          (Folder         *folder);
 254
 255 static gint     imap_create_tree        (Folder         *folder);
 256
 257 static FolderItem *imap_create_folder   (Folder         *folder,
 258                                          FolderItem     *parent,
 259                                          const gchar    *name);
 260 static gint     imap_rename_folder      (Folder         *folder,
 261                                          FolderItem     *item,
 262                                          const gchar    *name);
 263 static gint     imap_remove_folder      (Folder         *folder,
 264                                          FolderItem     *item);
 265
 266 static FolderItem *imap_folder_item_new (Folder         *folder);
 267 static void imap_folder_item_destroy    (Folder         *folder,
 268                                          FolderItem     *item);
 269
 270 static IMAPSession *imap_session_get    (Folder         *folder);
 271
 272 static gint imap_auth                   (IMAPSession    *session,
 273                                          const gchar    *user,
 274                                          const gchar    *pass,
 275                                          IMAPAuthType    type);
 276
 277 static gint imap_scan_tree_recursive    (IMAPSession    *session,
 278                                          FolderItem     *item,
 279                                          gboolean        subs_only);
 280
 281 static void imap_create_missing_folders (Folder         *folder);
 282 static FolderItem *imap_create_special_folder
 283                                         (Folder                 *folder,
 284                                          SpecialFolderItemType   stype,
 285                                          const gchar            *name);
 286
 287 static gint imap_do_copy_msgs           (Folder         *folder,
 288                                          FolderItem     *dest,
 289                                          MsgInfoList    *msglist,
 290                                          GHashTable     *relation,
 291                                          gboolean        same_dest_ok);
 292
 293 static gint imap_do_remove_msgs         (Folder         *folder,
 294                                          FolderItem     *dest,
 295                                          MsgInfoList    *msglist,
 296                                          GHashTable     *relation);
 297
 298 static void imap_delete_all_cached_messages     (FolderItem     *item);
 299 static void imap_set_batch              (Folder         *folder,
 300                                          FolderItem     *item,
 301                                          gboolean        batch);
 302 static gint imap_set_message_flags      (IMAPSession    *session,
 303                                          IMAPFolderItem *item,
 304                                          MsgNumberList  *numlist,
 305                                          IMAPFlags       flags,
 306                                          GSList         *tags,
 307                                          gboolean        is_set);
 308 static gint imap_select                 (IMAPSession    *session,
 309                                          IMAPFolder     *folder,
 310                                          FolderItem     *item,
 311                                          gint           *exists,
 312                                          gint           *recent,
 313                                          gint           *unseen,
 314                                          guint32        *uid_validity,
 315                                          gint           *can_create_flags,
 316                                          gboolean        block);
 317 static gint imap_status                 (IMAPSession    *session,
 318                                          IMAPFolder     *folder,
 319                                          const gchar    *path,
 320                                          IMAPFolderItem *item,
 321                                          gint           *messages,
 322                                          guint32        *uid_next,
 323                                          guint32        *uid_validity,
 324                                          gint           *unseen,
 325                                          gboolean        block);
 326 static void     imap_commit_tags        (FolderItem     *item,
 327                                          MsgInfo        *msginfo,
 328                                          GSList         *set_tags,
 329                                          GSList         *unset_tags);
 330
 331 static gchar imap_get_path_separator            (IMAPSession    *session,
 332                                                  IMAPFolder     *folder,
 333                                                  const gchar    *path,
 334                                                  gint           *ok);
 335 static gchar *imap_get_real_path                (IMAPSession    *session,
 336                                                  IMAPFolder     *folder,
 337                                                  const gchar    *path,
 338                                                  gint           *ok);
 339 #ifdef HAVE_LIBETPAN
 340 static void imap_synchronise            (FolderItem     *item, gint days);
 341 #endif
 342 static gboolean imap_is_busy            (Folder *folder);
 343
 344 static void imap_free_capabilities      (IMAPSession    *session);
 345
 346 /* low-level IMAP4rev1 commands */
 347 static gint imap_cmd_login      (IMAPSession    *session,
 348                                  const gchar    *user,
 349                                  const gchar    *pass,
 350                                  const gchar    *type);
 351 static gint imap_cmd_noop       (IMAPSession    *session);
 352 #ifdef USE_GNUTLS
 353 static gint imap_cmd_starttls   (IMAPSession    *session);
 354 #endif
 355 static gint imap_cmd_select     (IMAPSession    *session,
 356                                  const gchar    *folder,
 357                                  gint           *exists,
 358                                  gint           *recent,
 359                                  gint           *unseen,
 360                                  guint32        *uid_validity,
 361                                  gint           *can_create_flags,
 362                                  GSList         **ok_flags,
 363                                  gboolean        block);
 364 static gint imap_cmd_close      (IMAPSession    *session);
 365 static gint imap_cmd_examine    (IMAPSession    *session,
 366                                  const gchar    *folder,
 367                                  gint           *exists,
 368                                  gint           *recent,
 369                                  gint           *unseen,
 370                                  guint32        *uid_validity,
 371                                  gboolean        block);
 372 static gint imap_cmd_create     (IMAPSession    *sock,
 373                                  const gchar    *folder);
 374 static gint imap_cmd_rename     (IMAPSession    *sock,
 375                                  const gchar    *oldfolder,
 376                                  const gchar    *newfolder);
 377 static gint imap_cmd_delete     (IMAPSession    *session,
 378                                  const gchar    *folder);
 379 static gint imap_cmd_fetch      (IMAPSession    *sock,
 380                                  guint32         uid,
 381                                  const gchar    *filename,
 382                                  gboolean        headers,
 383                                  gboolean        body);
 384 static gint imap_cmd_append     (IMAPSession    *session,
 385                                  IMAPFolderItem *item,
 386                                  const gchar    *destfolder,
 387                                  const gchar    *file,
 388                                  IMAPFlags       flags,
 389                                  guint32        *new_uid);
 390 static gint imap_cmd_copy       (IMAPSession *session,
 391                                  struct mailimap_set * set,
 392                                  const gchar *destfolder,
 393                                  struct mailimap_set ** source,
 394                                  struct mailimap_set ** dest);
 395 static gint imap_cmd_store      (IMAPSession    *session,
 396                                  IMAPFolderItem *item,
 397                                  struct mailimap_set * set,
 398                                  IMAPFlags flags,
 399                                  GSList *tags,
 400                                  int do_add);
 401 static gint imap_cmd_expunge    (IMAPSession    *session);
 402
 403 static void imap_path_separator_subst           (gchar          *str,
 404                                                  gchar           separator);
 405
 406 static gboolean imap_rename_folder_func         (GNode          *node,
 407                                                  gpointer        data);
 408 static gint imap_get_num_list                   (Folder         *folder,
 409                                                  FolderItem     *item,
 410                                                  GSList        **list,
 411                                                  gboolean       *old_uids_valid);
 412 static GSList *imap_get_msginfos                (Folder         *folder,
 413                                                  FolderItem     *item,
 414                                                  GSList         *msgnum_list);
 415 static MsgInfo *imap_get_msginfo                (Folder         *folder,
 416                                                  FolderItem     *item,
 417                                                  gint            num);
 418 static gboolean imap_scan_required              (Folder         *folder,
 419                                                  FolderItem     *item);
 420 static void imap_change_flags                   (Folder         *folder,
 421                                                  FolderItem     *item,
 422                                                  MsgInfo        *msginfo,
 423                                                  MsgPermFlags    newflags);
 424 static gint imap_get_flags                      (Folder         *folder,
 425                                                  FolderItem     *item,
 426                                                  MsgInfoList    *msglist,
 427                                                  GHashTable     *msgflags);
 428 static gchar *imap_item_get_path                (Folder         *folder,
 429                                                  FolderItem     *item);
 430 static MsgInfo *imap_parse_msg(const gchar *file, FolderItem *item);
 431
 432
 433 /* data types conversion libetpan <-> claws */
 434 static GSList * imap_list_from_lep(IMAPFolder * folder,
 435                                    clist * list, const gchar * real_path, gboolean all);
 436 static GSList * imap_get_lep_set_from_numlist(IMAPFolder *folder, MsgNumberList *numlist);
 437 static GSList * imap_get_lep_set_from_msglist(IMAPFolder *folder, MsgInfoList *msglist);
 438 static GSList * imap_uid_list_from_lep(clist * list, gint* length);
 439 static GSList * imap_uid_list_from_lep_tab(carray * list);
 440 static void imap_flags_hash_from_lep_uid_flags_tab(carray * list,
 441                                                    GHashTable * hash,
 442                                                    GHashTable *tags_hash);
 443 static MsgInfo *imap_envelope_from_lep(struct imap_fetch_env_info * info,
 444                                        FolderItem *item);
 445 static void imap_lep_set_free(GSList *seq_list);
 446 static struct mailimap_flag_list * imap_flag_to_lep(IMAPFolderItem *item, IMAPFlags flags, GSList *tags);
 447
 448 typedef struct _hashtable_data {
 449         GSList *msglist;
 450         IMAPFolderItem *item;
 451 } hashtable_data;
 452
 453 static FolderClass imap_class;
 454
 455 FolderClass *imap_get_class(void)
 456 {
 457         if (imap_class.idstr == NULL) {
 458                 imap_class.type = F_IMAP;
 459                 imap_class.idstr = "imap";
 460                 imap_class.uistr = "IMAP";
 461                 imap_class.supports_server_search = TRUE;
 462
 463                 /* Folder functions */
 464                 imap_class.new_folder = imap_folder_new;
 465                 imap_class.destroy_folder = imap_folder_destroy;
 466                 imap_class.scan_tree = imap_scan_tree;
 467                 imap_class.create_tree = imap_create_tree;
 468
 469                 /* FolderItem functions */
 470                 imap_class.item_new = imap_folder_item_new;
 471                 imap_class.item_destroy = imap_folder_item_destroy;
 472                 imap_class.item_get_path = imap_item_get_path;
 473                 imap_class.create_folder = imap_create_folder;
 474                 imap_class.rename_folder = imap_rename_folder;
 475                 imap_class.remove_folder = imap_remove_folder;
 476                 imap_class.close = imap_close;
 477                 imap_class.get_num_list = imap_get_num_list;
 478                 imap_class.scan_required = imap_scan_required;
 479                 imap_class.set_xml = folder_set_xml;
 480                 imap_class.get_xml = folder_get_xml;
 481                 imap_class.item_set_xml = imap_item_set_xml;
 482                 imap_class.item_get_xml = imap_item_get_xml;
 483
 484                 /* Message functions */
 485                 imap_class.get_msginfo = imap_get_msginfo;
 486                 imap_class.get_msginfos = imap_get_msginfos;
 487                 imap_class.fetch_msg = imap_fetch_msg;
 488                 imap_class.fetch_msg_full = imap_fetch_msg_full;
 489                 imap_class.add_msg = imap_add_msg;
 490                 imap_class.add_msgs = imap_add_msgs;
 491                 imap_class.copy_msg = imap_copy_msg;
 492                 imap_class.copy_msgs = imap_copy_msgs;
 493                 imap_class.search_msgs = search_msgs;
 494                 imap_class.remove_msg = imap_remove_msg;
 495                 imap_class.remove_msgs = imap_remove_msgs;
 496                 imap_class.expunge = imap_expunge;
 497                 imap_class.remove_all_msg = imap_remove_all_msg;
 498                 imap_class.is_msg_changed = imap_is_msg_changed;
 499                 imap_class.change_flags = imap_change_flags;
 500                 imap_class.get_flags = imap_get_flags;
 501                 imap_class.set_batch = imap_set_batch;
 502                 imap_class.synchronise = imap_synchronise;
 503                 imap_class.remove_cached_msg = imap_remove_cached_msg;
 504                 imap_class.commit_tags = imap_commit_tags;
 505         }
 506
 507         return &imap_class;
 508 }
 509
 510 static void imap_refresh_sensitivity (IMAPSession *session)
 511 {
 512         MainWindow *mainwin;
 513
 514         if (session->sens_update_block)
 515                 return;
 516         mainwin = mainwindow_get_mainwindow();
 517         if (mainwin) {
 518                 toolbar_main_set_sensitive(mainwin);
 519                 main_window_set_menu_sensitive(mainwin);
 520         }
 521 }
 522
 523 static void lock_session(IMAPSession *session)
 524 {
 525         if (session) {
 526                 debug_print("locking session %p (%d)\n", session, session->busy);
 527                 if (session->busy)
 528                         debug_print("         SESSION WAS LOCKED !!      \n");
 529                 session->busy = TRUE;
 530                 imap_refresh_sensitivity(session);
 531         } else {
 532                 debug_print("can't lock null session\n");
 533         }
 534 }
 535
 536 static void unlock_session(IMAPSession *session)
 537 {
 538         if (session) {
 539                 debug_print("unlocking session %p\n", session);
 540                 session->busy = FALSE;
 541                 imap_refresh_sensitivity(session);
 542         } else {
 543                 debug_print("can't unlock null session\n");
 544         }
 545 }
 546
 547 static gboolean imap_ping(gpointer data)
 548 {
 549         Session *session = (Session *)data;
 550         IMAPSession *imap_session = IMAP_SESSION(session);
 551         int r;
 552
 553         if (session->state != SESSION_READY)
 554                 return FALSE;
 555         if (imap_session->busy || !imap_session->authenticated)
 556                 return TRUE;
 557
 558         lock_session(imap_session);
 559         r = imap_cmd_noop(imap_session);
 560         unlock_session(imap_session);
 561
 562         return r == MAILIMAP_NO_ERROR;
 563 }
 564
 565 static void imap_disc_session_destroy(IMAPSession *session)
 566 {
 567         RemoteFolder *rfolder = NULL;
 568
 569         if (session == NULL)
 570                 return;
 571
 572         rfolder = REMOTE_FOLDER(IMAP_SESSION(session)->folder);
 573
 574         if (rfolder == NULL)
 575                 return;
 576         log_warning(LOG_PROTOCOL, _("IMAP connection broken\n"));
 577         SESSION(session)->state = SESSION_DISCONNECTED;
 578         SESSION(session)->sock = NULL;
 579 }
 580
 581 static void imap_safe_destroy(IMAPSession *session)
 582 {
 583         if (!session->busy)
 584                 session_destroy(SESSION(session));
 585         else
 586                 session->do_destroy = TRUE;
 587 }
 588
 589 static gboolean is_fatal(int libetpan_errcode)
 590 {
 591         switch(libetpan_errcode) {
 592         case MAILIMAP_ERROR_STREAM:
 593         case MAILIMAP_ERROR_PROTOCOL:
 594         case MAILIMAP_ERROR_PARSE:
 595         case MAILIMAP_ERROR_BAD_STATE:
 596                 return TRUE;
 597         default:
 598                 return FALSE;
 599         }
 600 }
 601
 602 static void imap_handle_error(Session *session, const gchar *server, int libetpan_errcode)
 603 {
 604         const gchar *session_server = (session ? session->server : NULL);
 605
 606         if (session_server == NULL)
 607                 session_server = server;
 608         if (session_server == NULL)
 609                 session_server = "(null)";
 610
 611         switch(libetpan_errcode) {
 612         case MAILIMAP_NO_ERROR:
 613                 return;
 614         case MAILIMAP_NO_ERROR_AUTHENTICATED:
 615                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("authenticated"), "\n", NULL), session_server);
 616                 break;
 617         case MAILIMAP_NO_ERROR_NON_AUTHENTICATED:
 618                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("not authenticated"), "\n", NULL), session_server);
 619                 break;
 620         case MAILIMAP_ERROR_BAD_STATE:
 621                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("bad state"), "\n", NULL), session_server);
 622                 break;
 623         case MAILIMAP_ERROR_STREAM:
 624                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("stream error"), "\n", NULL), session_server);
 625                 break;
 626         case MAILIMAP_ERROR_PARSE:
 627                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("parse error "
 628                                             "(very probably non-RFC compliance from the server)"), "\n", NULL), session_server);
 629                 break;
 630         case MAILIMAP_ERROR_CONNECTION_REFUSED:
 631                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("connection refused"), "\n", NULL), session_server);
 632                 break;
 633         case MAILIMAP_ERROR_MEMORY:
 634                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("memory error"), "\n", NULL), session_server);
 635                 break;
 636         case MAILIMAP_ERROR_FATAL:
 637                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("fatal error"), "\n", NULL), session_server);
 638                 break;
 639         case MAILIMAP_ERROR_PROTOCOL:
 640                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("protocol error "
 641                                             "(very probably non-RFC compliance from the server)"), "\n", NULL), session_server);
 642                 break;
 643         case MAILIMAP_ERROR_DONT_ACCEPT_CONNECTION:
 644                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("connection not accepted"), "\n", NULL), session_server);
 645                 break;
 646         case MAILIMAP_ERROR_APPEND:
 647                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("APPEND error"), "\n", NULL), session_server);
 648                 break;
 649         case MAILIMAP_ERROR_NOOP:
 650                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("NOOP error"), "\n", NULL), session_server);
 651                 break;
 652         case MAILIMAP_ERROR_LOGOUT:
 653                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("LOGOUT error"), "\n", NULL), session_server);
 654                 break;
 655         case MAILIMAP_ERROR_CAPABILITY:
 656                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("CAPABILITY error"), "\n", NULL), session_server);
 657                 break;
 658         case MAILIMAP_ERROR_CHECK:
 659                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("CHECK error"), "\n", NULL), session_server);
 660                 break;
 661         case MAILIMAP_ERROR_CLOSE:
 662                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("CLOSE error"), "\n", NULL), session_server);
 663                 break;
 664         case MAILIMAP_ERROR_EXPUNGE:
 665                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("EXPUNGE error"), "\n", NULL), session_server);
 666                 break;
 667         case MAILIMAP_ERROR_COPY:
 668                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("COPY error"), "\n", NULL), session_server);
 669                 break;
 670         case MAILIMAP_ERROR_UID_COPY:
 671                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("UID COPY error"), "\n", NULL), session_server);
 672                 break;
 673         case MAILIMAP_ERROR_CREATE:
 674                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("CREATE error"), "\n", NULL), session_server);
 675                 break;
 676         case MAILIMAP_ERROR_DELETE:
 677                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("DELETE error"), "\n", NULL), session_server);
 678                 break;
 679         case MAILIMAP_ERROR_EXAMINE:
 680                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("EXAMINE error"), "\n", NULL), session_server);
 681                 break;
 682         case MAILIMAP_ERROR_FETCH:
 683                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("FETCH error"), "\n", NULL), session_server);
 684                 break;
 685         case MAILIMAP_ERROR_UID_FETCH:
 686                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("UID FETCH error"), "\n", NULL), session_server);
 687                 break;
 688         case MAILIMAP_ERROR_LIST:
 689                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("LIST error"), "\n", NULL), session_server);
 690                 break;
 691         case MAILIMAP_ERROR_LOGIN:
 692                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("LOGIN error"), "\n", NULL), session_server);
 693                 break;
 694         case MAILIMAP_ERROR_LSUB:
 695                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("LSUB error"), "\n", NULL), session_server);
 696                 break;
 697         case MAILIMAP_ERROR_RENAME:
 698                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("RENAME error"), "\n", NULL), session_server);
 699                 break;
 700         case MAILIMAP_ERROR_SEARCH:
 701                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("SEARCH error"), "\n", NULL), session_server);
 702                 break;
 703         case MAILIMAP_ERROR_UID_SEARCH:
 704                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("UID SEARCH error"), "\n", NULL), session_server);
 705                 break;
 706         case MAILIMAP_ERROR_SELECT:
 707                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("SELECT error"), "\n", NULL), session_server);
 708                 break;
 709         case MAILIMAP_ERROR_STATUS:
 710                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("STATUS error"), "\n", NULL), session_server);
 711                 break;
 712         case MAILIMAP_ERROR_STORE:
 713                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("STORE error"), "\n", NULL), session_server);
 714                 break;
 715         case MAILIMAP_ERROR_UID_STORE:
 716                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("UID STORE error"), "\n", NULL), session_server);
 717                 break;
 718         case MAILIMAP_ERROR_SUBSCRIBE:
 719                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("SUBSCRIBE error"), "\n", NULL), session_server);
 720                 break;
 721         case MAILIMAP_ERROR_UNSUBSCRIBE:
 722                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("UNSUBSCRIBE error"), "\n", NULL), session_server);
 723                 break;
 724         case MAILIMAP_ERROR_STARTTLS:
 725                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("STARTTLS error"), "\n", NULL), session_server);
 726                 break;
 727         case MAILIMAP_ERROR_INVAL:
 728                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("INVAL error"), "\n", NULL), session_server);
 729                 break;
 730         case MAILIMAP_ERROR_EXTENSION:
 731                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("EXTENSION error"), "\n", NULL), session_server);
 732                 break;
 733         case MAILIMAP_ERROR_SASL:
 734                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("SASL error"), "\n", NULL), session_server);
 735                 break;
 736 #ifdef USE_GNUTLS
 737         case MAILIMAP_ERROR_SSL:
 738                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("SSL/TLS error"), "\n", NULL), session_server);
 739                 break;
 740 #endif
 741         default:
 742                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("Unknown error [%d]"), "\n", NULL),
 743                         session_server, libetpan_errcode);
 744                 break;
 745         }
 746
 747         if (session && is_fatal(libetpan_errcode)) {
 748                 imap_disc_session_destroy(IMAP_SESSION(session));
 749         } else if (session && !is_fatal(libetpan_errcode)) {
 750                 if (IMAP_SESSION(session)->busy)
 751                         unlock_session(IMAP_SESSION(session));
 752         }
 753 }
 754
 755 static Folder *imap_folder_new(const gchar *name, const gchar *path)
 756 {
 757         Folder *folder;
 758
 759         folder = (Folder *)g_new0(IMAPFolder, 1);
 760         folder->klass = &imap_class;
 761         imap_folder_init(folder, name, path);
 762
 763         return folder;
 764 }
 765
 766 static void imap_folder_destroy(Folder *folder)
 767 {
 768         while (imap_folder_get_refcnt(folder) > 0)
 769                 gtk_main_iteration();
 770
 771         g_free(IMAP_FOLDER(folder)->search_charset);
 772
 773         folder_remote_folder_destroy(REMOTE_FOLDER(folder));
 774         imap_done(folder);
 775 }
 776
 777 static void imap_folder_init(Folder *folder, const gchar *name,
 778                              const gchar *path)
 779 {
 780         folder_remote_folder_init((Folder *)folder, name, path);
 781         IMAP_FOLDER(folder)->max_set_size = IMAP_SET_MAX_COUNT;
 782         IMAP_FOLDER(folder)->search_charset_supported = TRUE;
 783         IMAP_FOLDER(folder)->search_charset = g_strdup(conv_get_locale_charset_str_no_utf8());
 784 }
 785
 786 static FolderItem *imap_folder_item_new(Folder *folder)
 787 {
 788         IMAPFolderItem *item;
 789
 790         item = g_new0(IMAPFolderItem, 1);
 791         item->lastuid = 0;
 792         item->uid_next = 0;
 793         item->uid_list = NULL;
 794
 795         return (FolderItem *)item;
 796 }
 797
 798 static void imap_folder_item_destroy(Folder *folder, FolderItem *_item)
 799 {
 800         IMAPFolderItem *item = (IMAPFolderItem *)_item;
 801
 802         g_return_if_fail(item != NULL);
 803         g_slist_free(item->uid_list);
 804
 805         g_free(_item);
 806 }
 807
 808 static gboolean imap_reset_uid_lists_func(GNode *node, gpointer data)
 809 {
 810         IMAPFolderItem *item = (IMAPFolderItem *)node->data;
 811
 812         item->lastuid = 0;
 813         g_slist_free(item->uid_list);
 814         item->uid_list = NULL;
 815
 816         return FALSE;
 817 }
 818
 819 static void imap_reset_uid_lists(Folder *folder)
 820 {
 821         if(folder->node == NULL)
 822                 return;
 823
 824         /* Destroy all uid lists and rest last uid */
 825         g_node_traverse(folder->node, G_IN_ORDER, G_TRAVERSE_ALL, -1, imap_reset_uid_lists_func, NULL);
 826 }
 827
 828 static int imap_get_capabilities(IMAPSession *session)
 829 {
 830         struct mailimap_capability_data *capabilities = NULL;
 831         clistiter *cur;
 832         int result;
 833
 834         if (session->capability != NULL)
 835                 return MAILIMAP_NO_ERROR;
 836
 837         result = imap_threaded_capability(session->folder, &capabilities);
 838
 839         if (result != MAILIMAP_NO_ERROR) {
 840                 return result;
 841         }
 842
 843         if (capabilities == NULL || capabilities->cap_list == NULL) {
 844                 return MAILIMAP_NO_ERROR;
 845         }
 846
 847         for(cur = clist_begin(capabilities->cap_list) ; cur != NULL ;
 848             cur = clist_next(cur)) {
 849                 struct mailimap_capability * cap =
 850                         clist_content(cur);
 851                 if (!cap || cap->cap_data.cap_name == NULL)
 852                         continue;
 853                 session->capability = g_slist_append
 854                                 (session->capability,
 855                                  g_strdup(cap->cap_data.cap_name));
 856                 debug_print("got capa %s\n", cap->cap_data.cap_name);
 857         }
 858         mailimap_capability_data_free(capabilities);
 859         return MAILIMAP_NO_ERROR;
 860 }
 861
 862 static gboolean imap_has_capability(IMAPSession *session, const gchar *cap)
 863 {
 864         GSList *cur;
 865         for (cur = session->capability; cur; cur = cur->next) {
 866                 if (!g_ascii_strcasecmp(cur->data, cap))
 867                         return TRUE;
 868         }
 869         return FALSE;
 870 }
 871
 872 static gint imap_auth(IMAPSession *session, const gchar *user, const gchar *pass,
 873                       IMAPAuthType type)
 874 {
 875         gint ok = MAILIMAP_ERROR_LOGIN;
 876         static time_t last_login_err = 0;
 877         gchar *ext_info = "";
 878         int r;
 879         gchar *server = NULL;
 880         if ((r = imap_get_capabilities(session)) != MAILIMAP_NO_ERROR) {
 881                 imap_handle_error(SESSION(session), NULL, r);
 882                 return r;
 883         }
 884         server = g_strdup(SESSION(session)->server);
 885         switch(type) {
 886         case IMAP_AUTH_ANON:
 887                 ok = imap_cmd_login(session, user, pass, "ANONYMOUS");
 888                 break;
 889         case IMAP_AUTH_CRAM_MD5:
 890                 ok = imap_cmd_login(session, user, pass, "CRAM-MD5");
 891                 break;
 892         case IMAP_AUTH_DIGEST_MD5:
 893                 ok = imap_cmd_login(session, user, pass, "DIGEST-MD5");
 894                 break;
 895         case IMAP_AUTH_SCRAM_SHA1:
 896                 ok = imap_cmd_login(session, user, pass, "SCRAM-SHA-1");
 897                 break;
 898         case IMAP_AUTH_PLAIN:
 899                 ok = imap_cmd_login(session, user, pass, "PLAIN");
 900                 break;
 901         case IMAP_AUTH_LOGIN:
 902                 ok = imap_cmd_login(session, user, pass, "LOGIN");
 903                 break;
 904         case IMAP_AUTH_PLAINTEXT:
 905                 ok = imap_cmd_login(session, user, pass, "plaintext");
 906                 break;
 907         case IMAP_AUTH_GSSAPI:
 908                 ok = imap_cmd_login(session, user, pass, "GSSAPI");
 909                 break;
 910         default:
 911                 debug_print("capabilities:\n"
 912                                 "\t ANONYMOUS %d\n"
 913                                 "\t CRAM-MD5 %d\n"
 914                                 "\t DIGEST-MD5 %d\n"
 915                                 "\t SCRAM-SHA-1 %d\n"
 916                                 "\t PLAIN %d\n"
 917                                 "\t LOGIN %d\n"
 918                                 "\t GSSAPI %d\n",
 919                         imap_has_capability(session, "ANONYMOUS"),
 920                         imap_has_capability(session, "CRAM-MD5"),
 921                         imap_has_capability(session, "DIGEST-MD5"),
 922                         imap_has_capability(session, "SCRAM-SHA-1"),
 923                         imap_has_capability(session, "PLAIN"),
 924                         imap_has_capability(session, "LOGIN"),
 925                         imap_has_capability(session, "GSSAPI"));
 926                 if (imap_has_capability(session, "CRAM-MD5"))
 927                         ok = imap_cmd_login(session, user, pass, "CRAM-MD5");
 928                 if (ok == MAILIMAP_ERROR_LOGIN && imap_has_capability(session, "DIGEST-MD5"))
 929                         ok = imap_cmd_login(session, user, pass, "DIGEST-MD5");
 930                 if (ok == MAILIMAP_ERROR_LOGIN && imap_has_capability(session, "SCRAM-SHA-1"))
 931                         ok = imap_cmd_login(session, user, pass, "SCRAM-SHA-1");
 932                 if (ok == MAILIMAP_ERROR_LOGIN && imap_has_capability(session, "PLAIN"))
 933                         ok = imap_cmd_login(session, user, pass, "PLAIN");
 934                 if (ok == MAILIMAP_ERROR_LOGIN && imap_has_capability(session, "LOGIN"))
 935                         ok = imap_cmd_login(session, user, pass, "LOGIN");
 936                 if (ok == MAILIMAP_ERROR_LOGIN && imap_has_capability(session, "GSSAPI"))
 937                         ok = imap_cmd_login(session, user, pass, "GSSAPI");
 938                 if (ok == MAILIMAP_ERROR_LOGIN) /* we always try plaintext login before giving up */
 939                         ok = imap_cmd_login(session, user, pass, "plaintext");
 940         }
 941
 942         if (ok == MAILIMAP_NO_ERROR)
 943                 session->authenticated = TRUE;
 944         else {
 945                 if (type == IMAP_AUTH_CRAM_MD5) {
 946                         ext_info = _("\n\nCRAM-MD5 logins only work if libetpan has been "
 947                                      "compiled with SASL support and the "
 948                                      "CRAM-MD5 SASL plugin is installed.");
 949                 }
 950
 951                 if (type == IMAP_AUTH_DIGEST_MD5) {
 952                         ext_info = _("\n\nDIGEST-MD5 logins only work if libetpan has been "
 953                                      "compiled with SASL support and the "
 954                                      "DIGEST-MD5 SASL plugin is installed.");
 955                 }
 956
 957                 if (type == IMAP_AUTH_SCRAM_SHA1) {
 958                         ext_info = _("\n\nSCRAM-SHA-1 logins only work if libetpan has been "
 959                                      "compiled with SASL support and the "
 960                                      "SCRAM SASL plugin is installed.");
 961                 }
 962
 963                 if (type == IMAP_AUTH_PLAIN) {
 964                         ext_info = _("\n\nPLAIN logins only work if libetpan has been "
 965                                      "compiled with SASL support and the "
 966                                      "PLAIN SASL plugin is installed.");
 967                 }
 968
 969                 if (type == IMAP_AUTH_LOGIN) {
 970                         ext_info = _("\n\nLOGIN logins only work if libetpan has been "
 971                                      "compiled with SASL support and the "
 972                                      "LOGIN SASL plugin is installed.");
 973                 }
 974
 975                 if (time(NULL) - last_login_err > 10) {
 976                         if (!prefs_common.no_recv_err_panel) {
 977                                 alertpanel_error_log(_("Connection to %s failed: "
 978                                         "login refused.%s"),
 979                                         server, ext_info);
 980                         } else {
 981                                 log_error(LOG_PROTOCOL, _("Connection to %s failed: "
 982                                         "login refused.%s\n"),
 983                                         server, ext_info);
 984                         }
 985                 }
 986                 last_login_err = time(NULL);
 987         }
 988         g_free(server);
 989         return ok;
 990 }
 991
 992 static IMAPSession *imap_reconnect_if_possible(Folder *folder, IMAPSession *session)
 993 {
 994         RemoteFolder *rfolder = REMOTE_FOLDER(folder);
 995         /* Check if this is the first try to establish a
 996            connection, if yes we don't try to reconnect */
 997         debug_print("reconnecting\n");
 998         if (rfolder->session == NULL) {
 999                 log_warning(LOG_PROTOCOL, _("Connecting to %s failed"),
1000                             folder->account->recv_server);
1001                 SESSION(session)->sock = NULL;
1002                 imap_safe_destroy(session);
1003                 session = NULL;
1004         } else {
1005                 rfolder->session = NULL;
1006                 log_warning(LOG_PROTOCOL, _("IMAP connection to %s has been"
1007                             " disconnected. Reconnecting...\n"),
1008                             folder->account->recv_server);
1009                 statusbar_print_all(_("IMAP connection to %s has been"
1010                             " disconnected. Reconnecting...\n"),
1011                             folder->account->recv_server);
1012                 SESSION(session)->state = SESSION_DISCONNECTED;
1013                 SESSION(session)->sock = NULL;
1014                 imap_safe_destroy(session);
1015                 /* Clear folders session to make imap_session_get create
1016                    a new session, because of rfolder->session == NULL
1017                    it will not try to reconnect again and so avoid an
1018                    endless loop */
1019                 debug_print("getting session...\n");
1020                 session = imap_session_get(folder);
1021                 rfolder->session = SESSION(session);
1022                 statusbar_pop_all();
1023         }
1024         return session;
1025 }
1026
1027 static IMAPSession *imap_session_get(Folder *folder)
1028 {
1029         RemoteFolder *rfolder = REMOTE_FOLDER(folder);
1030         IMAPSession *session = NULL;
1031         gint r = MAILIMAP_NO_ERROR;
1032
1033         g_return_val_if_fail(folder != NULL, NULL);
1034         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, NULL);
1035         g_return_val_if_fail(folder->account != NULL, NULL);
1036
1037         if (prefs_common.work_offline &&
1038             !inc_offline_should_override(FALSE,
1039                 _("Claws Mail needs network access in order "
1040                   "to access the IMAP server."))) {
1041                 return NULL;
1042         }
1043
1044         /* check for deferred destroy */
1045         if (rfolder->session != NULL) {
1046                 session = IMAP_SESSION(rfolder->session);
1047                 if (!session->busy && session->do_destroy) {
1048                         rfolder->session = NULL;
1049                         imap_safe_destroy(session);
1050                         session = NULL;
1051                 }
1052         }
1053
1054         /* Make sure we have a session */
1055         if (rfolder->session != NULL && rfolder->session->state != SESSION_DISCONNECTED) {
1056                 session = IMAP_SESSION(rfolder->session);
1057         } else if (rfolder->session != NULL && rfolder->session->state == SESSION_DISCONNECTED) {
1058                 imap_safe_destroy(IMAP_SESSION(rfolder->session));
1059                 rfolder->session = NULL;
1060                 goto new_conn;
1061         } else if (rfolder->connecting) {
1062                 debug_print("already connecting\n");
1063                 return NULL;
1064         } else {
1065 new_conn:
1066                 imap_reset_uid_lists(folder);
1067                 if (time(NULL) - rfolder->last_failure <= 2)
1068                         return NULL;
1069                 rfolder->connecting = TRUE;
1070                 session = imap_session_new(folder, folder->account);
1071         }
1072         if(session == NULL) {
1073                 rfolder->last_failure = time(NULL);
1074                 rfolder->connecting = FALSE;
1075                 return NULL;
1076         }
1077
1078         /* Make sure session is authenticated */
1079         if (!IMAP_SESSION(session)->authenticated)
1080                 r = imap_session_authenticate(IMAP_SESSION(session), folder->account);
1081
1082         if (r != MAILIMAP_NO_ERROR || (!is_fatal(r) && !IMAP_SESSION(session)->authenticated)) {
1083                 rfolder->session = NULL;
1084                 if (!is_fatal(r)) {
1085                         imap_threaded_disconnect(session->folder);
1086                 }
1087                 SESSION(session)->state = SESSION_DISCONNECTED;
1088                 SESSION(session)->sock = NULL;
1089                 imap_safe_destroy(session);
1090                 rfolder->last_failure = time(NULL);
1091                 rfolder->connecting = FALSE;
1092                 return NULL;
1093         }
1094
1095         /* I think the point of this code is to avoid sending a
1096          * keepalive if we've used the session recently and therefore
1097          * think it's still alive.  Unfortunately, most of the code
1098          * does not yet check for errors on the socket, and so if the
1099          * connection drops we don't notice until the timeout expires.
1100          * A better solution than sending a NOOP every time would be
1101          * for every command to be prepared to retry until it is
1102          * successfully sent. -- mbp */
1103         if ((time(NULL) - SESSION(session)->last_access_time > SESSION_TIMEOUT_INTERVAL) || session->cancelled) {
1104                 /* verify that the session is still alive */
1105                 r = imap_cmd_noop(session);
1106
1107                 if (r != MAILIMAP_NO_ERROR) {
1108                         debug_print("disconnected!\n");
1109                         if (!is_fatal(r))
1110                                 session = imap_reconnect_if_possible(folder, session);
1111                         else {
1112                                 rfolder->session = NULL;
1113                                 rfolder->connecting = FALSE;
1114                                 SESSION(session)->state = SESSION_DISCONNECTED;
1115                                 SESSION(session)->sock = NULL;
1116                                 imap_safe_destroy(session);
1117                                 session = imap_session_get(folder);
1118                         }
1119                 }
1120                 if (session)
1121                         session->cancelled = FALSE;
1122         }
1123
1124         rfolder->session = SESSION(session);
1125         rfolder->connecting = FALSE;
1126
1127         return IMAP_SESSION(session);
1128 }
1129
1130 static IMAPSession *imap_session_new(Folder * folder,
1131                                      const PrefsAccount *account)
1132 {
1133         IMAPSession *session;
1134         ProxyInfo *proxy_info = NULL;
1135         gushort port;
1136         int r;
1137         int authenticated = FALSE;
1138         gchar *buf;
1139
1140 #ifdef USE_GNUTLS
1141         /* FIXME: IMAP over SSL only... */
1142         SSLType ssl_type;
1143
1144         port = account->set_imapport ? account->imapport
1145                 : account->ssl_imap == SSL_TUNNEL ? IMAPS_PORT : IMAP4_PORT;
1146         ssl_type = account->ssl_imap;
1147 #else
1148         if (account->ssl_imap != SSL_NONE) {
1149                 if (alertpanel_full(_("Insecure connection"),
1150                         _("This connection is configured to be secured "
1151                           "using SSL/TLS, but SSL/TLS is not available "
1152                           "in this build of Claws Mail. \n\n"
1153                           "Do you want to continue connecting to this "
1154                           "server? The communication would not be "
1155                           "secure."),
1156                           GTK_STOCK_CANCEL, _("Con_tinue connecting"),
1157                           NULL, FALSE, NULL, ALERT_WARNING,
1158                           G_ALERTDEFAULT) != G_ALERTALTERNATE)
1159                         return NULL;
1160         }
1161         port = account->set_imapport ? account->imapport
1162                 : IMAP4_PORT;
1163 #endif
1164
1165         imap_init(folder);
1166         buf = g_strdup_printf(_("Account '%s': Connecting to IMAP server: %s:%d..."),
1167                                 folder->account->account_name, folder->account->recv_server,
1168                                 port);
1169         statusbar_print_all("%s", buf);
1170         log_message(LOG_PROTOCOL, "%s\n", buf);
1171         g_free(buf);
1172
1173         if (account->use_proxy) {
1174                 if (account->use_default_proxy) {
1175                         proxy_info = (ProxyInfo *)&(prefs_common.proxy_info);
1176                         if (proxy_info->use_proxy_auth)
1177                                 proxy_info->proxy_pass = passwd_store_get(PWS_CORE, PWS_CORE_PROXY,
1178                                         PWS_CORE_PROXY_PASS);
1179                 } else {
1180                         proxy_info = (ProxyInfo *)&(account->proxy_info);
1181                         if (proxy_info->use_proxy_auth)
1182                                 proxy_info->proxy_pass = passwd_store_get_account(account->account_id,
1183                                         PWS_ACCOUNT_PROXY_PASS);
1184                 }
1185         }
1186
1187 #ifndef G_OS_WIN32
1188         if (account->set_tunnelcmd) {
1189                 r = imap_threaded_connect_cmd(folder,
1190                                               account->tunnelcmd,
1191                                               account->recv_server,
1192                                               port);
1193         }
1194         else
1195 #endif
1196         {
1197 #ifdef USE_GNUTLS
1198
1199                 if (ssl_type == SSL_TUNNEL) {
1200                         r = imap_threaded_connect_ssl(folder,
1201                                                       account->recv_server,
1202                                                       port,
1203                                                       proxy_info);
1204                 }
1205                 else
1206 #endif
1207                 {
1208                         r = imap_threaded_connect(folder,
1209                                                   account->recv_server,
1210                                                   port,
1211                                                   proxy_info);
1212                 }
1213         }
1214
1215         statusbar_pop_all();
1216         if (r == MAILIMAP_NO_ERROR_AUTHENTICATED) {
1217                 authenticated = TRUE;
1218         }
1219         else if (r == MAILIMAP_NO_ERROR_NON_AUTHENTICATED) {
1220                 authenticated = FALSE;
1221         }
1222         else {
1223 #ifdef USE_GNUTLS
1224                 if (r == MAILIMAP_ERROR_SSL)
1225                         log_error(LOG_PROTOCOL, _("SSL/TLS handshake failed\n"));
1226                 else
1227 #endif
1228                         imap_handle_error(NULL, account->recv_server, r);
1229
1230                 if(!prefs_common.no_recv_err_panel) {
1231                         alertpanel_error_log(_("Can't connect to IMAP server: %s:%d"),
1232                                          account->recv_server, port);
1233                 } else {
1234                         log_error(LOG_PROTOCOL, _("Can't connect to IMAP server: %s:%d\n"),
1235                                          account->recv_server, port);
1236                 }
1237
1238                 return NULL;
1239         }
1240
1241         session = g_new0(IMAPSession, 1);
1242         session_init(SESSION(session), account, FALSE);
1243         SESSION(session)->type             = SESSION_IMAP;
1244         SESSION(session)->server           = g_strdup(account->recv_server);
1245         SESSION(session)->port             = port;
1246         SESSION(session)->sock             = NULL;
1247         SESSION(session)->proxy_info       = proxy_info;
1248         SESSION(session)->destroy          = imap_session_destroy;
1249
1250         session->capability = NULL;
1251         session->authenticated = authenticated;
1252         session->mbox = NULL;
1253         session->exists = 0;
1254         session->recent = 0;
1255         session->expunge = 0;
1256         session->cmd_count = 0;
1257         session->folder = folder;
1258         IMAP_FOLDER(session->folder)->last_seen_separator = 0;
1259
1260 #ifdef USE_GNUTLS
1261         if (account->ssl_imap == SSL_STARTTLS) {
1262                 gint ok;
1263
1264                 ok = imap_cmd_starttls(session);
1265                 if (ok != MAILIMAP_NO_ERROR) {
1266                         log_warning(LOG_PROTOCOL, _("Can't start STARTTLS session.\n"));
1267                         if (!is_fatal(ok)) {
1268                                 SESSION(session)->sock = NULL;
1269                                 imap_safe_destroy(session);
1270                         }
1271                         return NULL;
1272                 }
1273
1274                 imap_free_capabilities(session);
1275                 session->authenticated = FALSE;
1276                 session->uidplus = FALSE;
1277                 session->cmd_count = 1;
1278         }
1279 #endif
1280         log_message(LOG_PROTOCOL, "IMAP connection is %s-authenticated\n",
1281                     (session->authenticated) ? "pre" : "un");
1282
1283         session_register_ping(SESSION(session), imap_ping);
1284
1285         return session;
1286 }
1287
1288 static gint imap_session_authenticate(IMAPSession *session,
1289                                       PrefsAccount *account)
1290 {
1291         gchar *pass, *acc_pass = NULL;
1292         gboolean failed = FALSE;
1293         gint ok = MAILIMAP_NO_ERROR;
1294         g_return_val_if_fail(account->userid != NULL, MAILIMAP_ERROR_BAD_STATE);
1295
1296         if (!password_get(account->userid, account->recv_server, "imap",
1297                          SESSION(session)->port, &acc_pass)) {
1298                 acc_pass = passwd_store_get_account(account->account_id,
1299                                 PWS_ACCOUNT_RECV);
1300         }
1301
1302 try_again:
1303         pass = acc_pass;
1304         if (!pass && account->imap_auth_type != IMAP_AUTH_ANON && account->imap_auth_type != IMAP_AUTH_GSSAPI) {
1305                 gchar *tmp_pass;
1306                 tmp_pass = input_dialog_query_password_keep(account->recv_server,
1307                                                             account->userid,
1308                                                             &(account->session_passwd));
1309                 if (!tmp_pass) {
1310                         return MAILIMAP_NO_ERROR;
1311                 }
1312                 Xstrdup_a(pass, tmp_pass, {g_free(tmp_pass); return MAILIMAP_NO_ERROR;});
1313                 g_free(tmp_pass);
1314         } else if (account->imap_auth_type == IMAP_AUTH_ANON || account->imap_auth_type == IMAP_AUTH_GSSAPI) {
1315                 pass = "";
1316         }
1317         if ((ok = imap_auth(session, account->userid, pass, account->imap_auth_type)) != MAILIMAP_NO_ERROR) {
1318
1319                 if (!failed && !is_fatal(ok)) {
1320                         if (acc_pass != NULL) {
1321                                 memset(acc_pass, 0, strlen(acc_pass));
1322                                 g_free(acc_pass);
1323                                 acc_pass = NULL;
1324                         }
1325                         failed = TRUE;
1326                         if (account->session_passwd != NULL) {
1327                                 g_free(account->session_passwd);
1328                                 account->session_passwd = NULL;
1329                         }
1330                         goto try_again;
1331                 } else {
1332                         if (prefs_common.no_recv_err_panel) {
1333                                 log_error(LOG_PROTOCOL, _("Couldn't login to IMAP server %s.\n"), account->recv_server);
1334                                 mainwindow_show_error();
1335                         } else
1336                                 alertpanel_error_log(_("Couldn't login to IMAP server %s."), account->recv_server);
1337                 }
1338
1339                 if (acc_pass != NULL) {
1340                         memset(acc_pass, 0, strlen(acc_pass));
1341                         g_free(acc_pass);
1342                         acc_pass = NULL;
1343                 }
1344
1345                 return ok;
1346         }
1347
1348         if (acc_pass) {
1349                 memset(acc_pass, 0, strlen(acc_pass));
1350                 g_free(acc_pass);
1351         }
1352         statusbar_pop_all();
1353         session->authenticated = TRUE;
1354         return MAILIMAP_NO_ERROR;
1355 }
1356
1357 static void imap_session_destroy(Session *session)
1358 {
1359         if (session->state != SESSION_DISCONNECTED)
1360                 imap_threaded_disconnect(IMAP_SESSION(session)->folder);
1361
1362         imap_free_capabilities(IMAP_SESSION(session));
1363         g_free(IMAP_SESSION(session)->mbox);
1364 }
1365
1366 static gchar *imap_fetch_msg(Folder *folder, FolderItem *item, gint uid)
1367 {
1368         return imap_fetch_msg_full(folder, item, uid, TRUE, TRUE);
1369 }
1370
1371 static guint get_file_size_with_crs(const gchar *filename)
1372 {
1373         FILE *fp = NULL;
1374         guint cnt = 0;
1375         gchar buf[4096];
1376
1377         if (filename == NULL)
1378                 return -1;
1379
1380         fp = g_fopen(filename, "rb");
1381         if (!fp)
1382                 return -1;
1383
1384         while (fgets(buf, sizeof (buf), fp) != NULL) {
1385                 cnt += strlen(buf);
1386                 if (!strstr(buf, "\r\n") && strstr(buf, "\n"))
1387                         cnt++;
1388         }
1389
1390         fclose(fp);
1391         return cnt;
1392 }
1393
1394 static gchar *imap_get_cached_filename(FolderItem *item, guint msgnum)
1395 {
1396         gchar *path, *filename;
1397
1398         cm_return_val_if_fail(item != NULL, NULL);
1399
1400         path = folder_item_get_path(item);
1401
1402         if (!is_dir_exist(path)) {
1403                 g_free(path);
1404                 return NULL;
1405         }
1406
1407         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(msgnum), NULL);
1408
1409         if (is_dir_exist(filename)) {
1410                 g_free(filename);
1411                 filename = g_strconcat(path, G_DIR_SEPARATOR_S, ".", itos(msgnum), NULL);
1412         }
1413         g_free(path);
1414
1415         return filename;
1416 }
1417
1418 static void imap_remove_cached_msg(Folder *folder, FolderItem *item, MsgInfo *msginfo)
1419 {
1420         gchar *filename;
1421
1422         filename = imap_get_cached_filename(item, msginfo->msgnum);
1423
1424         cm_return_if_fail(filename != NULL);
1425
1426         if (is_file_exist(filename)) {
1427                 claws_unlink(filename);
1428         }
1429         g_free(filename);
1430 }
1431
1432 typedef struct _TagsData {
1433         gchar *str;
1434         GSList *msglist;
1435         IMAPFolderItem *item;
1436 } TagsData;
1437
1438 static void imap_commit_tags(FolderItem *item, MsgInfo *msginfo, GSList *tags_set, GSList *tags_unset)
1439 {
1440         IMAPSession *session;
1441         gint ok, can_create_tags;
1442         Folder *folder = NULL;
1443         TagsData *ht_data = NULL;
1444         GSList *cur;
1445
1446         g_return_if_fail(item != NULL);
1447         g_return_if_fail(msginfo != NULL);
1448
1449         folder = item->folder;
1450         debug_print("getting session...\n");
1451         session = imap_session_get(folder);
1452
1453         if (!session) {
1454                 debug_print("can't get session\n");
1455                 return;
1456         }
1457
1458         ok = imap_select(session, IMAP_FOLDER(folder), item,
1459                          NULL, NULL, NULL, NULL, &can_create_tags, FALSE);
1460
1461         if (ok != MAILIMAP_NO_ERROR) {
1462                 return;
1463         }
1464
1465
1466         if (IMAP_FOLDER_ITEM(item)->can_create_flags != ITEM_CAN_CREATE_FLAGS)
1467                 return;
1468
1469         if (IMAP_FOLDER_ITEM(item)->batching) {
1470                 /* instead of performing an UID STORE command for each message change,
1471                  * as a lot of them can change "together", we just fill in hashtables
1472                  * and defer the treatment so that we're able to send only one
1473                  * command.
1474                  */
1475                 debug_print("IMAP batch mode on, deferring tags change\n");
1476                 for (cur = tags_set; cur; cur = cur->next) {
1477                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1478                         if (cur_tag) {
1479                                 ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->tags_set_table,
1480                                         GINT_TO_POINTER(cur_tag));
1481                                 if (ht_data == NULL) {
1482                                         ht_data = g_new0(TagsData, 1);
1483                                         ht_data->str = g_strdup(tags_get_tag(cur_tag));
1484                                         ht_data->item = IMAP_FOLDER_ITEM(item);
1485                                         g_hash_table_insert(IMAP_FOLDER_ITEM(item)->tags_set_table,
1486                                                 GINT_TO_POINTER(cur_tag), ht_data);
1487                                 }
1488                                 ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
1489                         }
1490                 }
1491                 for (cur = tags_unset; cur; cur = cur->next) {
1492                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1493                         if (cur_tag) {
1494                                 ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->tags_unset_table,
1495                                         GINT_TO_POINTER(cur_tag));
1496                                 if (ht_data == NULL) {
1497                                         ht_data = g_new0(TagsData, 1);
1498                                         ht_data->str = g_strdup(tags_get_tag(cur_tag));
1499                                         ht_data->item = IMAP_FOLDER_ITEM(item);
1500                                         g_hash_table_insert(IMAP_FOLDER_ITEM(item)->tags_unset_table,
1501                                                 GINT_TO_POINTER(cur_tag), ht_data);
1502                                 }
1503                                 ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
1504                         }
1505                 }
1506         } else {
1507                 GSList *list_set = NULL;
1508                 GSList *list_unset = NULL;
1509                 GSList numlist;
1510
1511                 numlist.data = GINT_TO_POINTER(msginfo->msgnum);
1512                 numlist.next = NULL;
1513
1514                 debug_print("IMAP changing tags NOW\n");
1515                 for (cur = tags_set; cur; cur = cur->next) {
1516                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1517                         const gchar *str = tags_get_tag(cur_tag);
1518                         if (IS_NOT_RESERVED_TAG(str))
1519                                 list_set = g_slist_prepend(list_set, g_strdup(str));
1520                 }
1521                 if (list_set) {
1522                         ok = imap_set_message_flags(session,
1523                                 IMAP_FOLDER_ITEM(item), &numlist, 0, list_set, TRUE);
1524                         slist_free_strings_full(list_set);
1525                         if (ok != MAILIMAP_NO_ERROR) {
1526                                 return;
1527                         }
1528                 }
1529
1530                 for (cur = tags_unset; cur; cur = cur->next) {
1531                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1532                         const gchar *str = tags_get_tag(cur_tag);
1533                         if (IS_NOT_RESERVED_TAG(str))
1534                                 list_unset = g_slist_prepend(list_unset, g_strdup(str));
1535                 }
1536                 if (list_unset) {
1537                         ok = imap_set_message_flags(session,
1538                                 IMAP_FOLDER_ITEM(item), &numlist, 0, list_unset, FALSE);
1539                         slist_free_strings_full(list_unset);
1540                         if (ok != MAILIMAP_NO_ERROR) {
1541                                 return;
1542                         }
1543                 }
1544         }
1545 }
1546
1547 static gchar *imap_fetch_msg_full(Folder *folder, FolderItem *item, gint uid,
1548                                   gboolean headers, gboolean body)
1549 {
1550         gchar *path, *filename;
1551         IMAPSession *session;
1552         gint ok;
1553
1554         g_return_val_if_fail(folder != NULL, NULL);
1555         g_return_val_if_fail(item != NULL, NULL);
1556
1557         if (uid == 0)
1558                 return NULL;
1559
1560         path = folder_item_get_path(item);
1561         if (!is_dir_exist(path)) {
1562                 if(is_file_exist(path))
1563                         claws_unlink(path);
1564                 make_dir_hier(path);
1565         }
1566         g_free(path);
1567
1568         filename = imap_get_cached_filename(item, uid);
1569         debug_print("trying to fetch cached %s\n", filename);
1570
1571         if (is_file_exist(filename)) {
1572                 /* see whether the local file represents the whole message
1573                  * or not. As the IMAP server reports size with \r chars,
1574                  * we have to update the local file (UNIX \n only) size */
1575                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1576                 guint have_size = -1;
1577
1578                 if (cached)
1579                         debug_print("message %d has been already %scached.\n", uid,
1580                                 MSG_IS_FULLY_CACHED(cached->flags) ? "fully ":"");
1581
1582                 if (!cached || !MSG_IS_FULLY_CACHED(cached->flags)) {
1583                         have_size = get_file_size_with_crs(filename);
1584                         if (cached && (cached->size <= have_size || !body)) {
1585                                 ok = file_strip_crs(filename);
1586                                 if (ok == 0 && cached && cached->size <= have_size) {
1587                                         /* we have it all and stripped */
1588                                         debug_print("...fully cached in fact (%u/%zd); setting flag.\n",
1589                                                         have_size, cached->size);
1590                                         procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1591                                 }
1592                                 procmsg_msginfo_free(&cached);
1593                                 return filename;
1594                         } else if (!cached && time(NULL) - get_file_mtime(filename) < 60) {
1595                                 debug_print("message not cached and file recent, considering file complete\n");
1596                                 ok = file_strip_crs(filename);
1597                                 if (ok == 0)
1598                                         return filename;
1599                         } else {
1600                                 procmsg_msginfo_free(&cached);
1601                         }
1602                 }
1603                 if (cached && MSG_IS_FULLY_CACHED(cached->flags)) {
1604                         procmsg_msginfo_free(&cached);
1605                         return filename;
1606                 }
1607         } else {
1608                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1609                 if (cached) {
1610                         procmsg_msginfo_unset_flags(cached, MSG_FULLY_CACHED, 0);
1611                         procmsg_msginfo_free(&cached);
1612                 }
1613         }
1614
1615         debug_print("getting session...\n");
1616         session = imap_session_get(folder);
1617
1618         if (!session) {
1619                 g_free(filename);
1620                 return NULL;
1621         }
1622         session_set_access_time(SESSION(session));
1623         lock_session(session); /* unlocked later in the function */
1624
1625         debug_print("IMAP fetching messages\n");
1626         ok = imap_select(session, IMAP_FOLDER(folder), item,
1627                          NULL, NULL, NULL, NULL, NULL, FALSE);
1628         if (ok != MAILIMAP_NO_ERROR) {
1629                 g_warning("can't select mailbox %s", item->path);
1630                 g_free(filename);
1631                 return NULL;
1632         }
1633
1634         session_set_access_time(SESSION(session));
1635
1636         debug_print("getting message %d...\n", uid);
1637         ok = imap_cmd_fetch(session, (guint32)uid, filename, headers, body);
1638
1639         if (ok != MAILIMAP_NO_ERROR) {
1640                 g_warning("can't fetch message %d", uid);
1641                 g_free(filename);
1642                 return NULL;
1643         }
1644
1645         session_set_access_time(SESSION(session));
1646         unlock_session(session);
1647
1648         ok = file_strip_crs(filename);
1649
1650         if (ok == 0 && headers && body) {
1651                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1652                 if (cached) {
1653                         procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1654                         procmsg_msginfo_free(&cached);
1655                 }
1656         } else if (ok == -1) {
1657                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1658                 if (cached) {
1659                         procmsg_msginfo_unset_flags(cached, MSG_FULLY_CACHED, 0);
1660                         procmsg_msginfo_free(&cached);
1661                 }
1662         }
1663         return filename;
1664 }
1665
1666 static gboolean imap_is_msg_fully_cached(Folder *folder, FolderItem *item, gint uid)
1667 {
1668         gchar *filename;
1669         guint size = 0;
1670         MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1671
1672         if (!cached)
1673                 return FALSE;
1674
1675         if (MSG_IS_FULLY_CACHED(cached->flags)) {
1676                 procmsg_msginfo_free(&cached);
1677                 return TRUE;
1678         }
1679
1680         filename = imap_get_cached_filename(item, uid);
1681
1682         if (is_file_exist(filename)) {
1683                 if (cached && cached->total_size == cached->size) {
1684                         /* fast path */
1685                         g_free(filename);
1686                         procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1687                         return TRUE;
1688                 }
1689                 size = get_file_size_with_crs(filename);
1690         }
1691         g_free(filename);
1692         debug_print("msg %d cached, has size %d, full should be %zd.\n", uid, size, cached->size);
1693         if (cached && size >= cached->size) {
1694                 cached->total_size = cached->size;
1695                 procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1696                 procmsg_msginfo_free(&cached);
1697                 return TRUE;
1698         }
1699         if (cached)
1700                 procmsg_msginfo_free(&cached);
1701         return FALSE;
1702 }
1703
1704 void imap_cache_msg(FolderItem *item, gint msgnum)
1705 {
1706         Folder *folder = NULL;
1707
1708         if (!item)
1709                 return;
1710         folder = item->folder;
1711
1712         if (!imap_is_msg_fully_cached(folder, item, msgnum)) {
1713                 gchar *tmp = imap_fetch_msg_full(folder, item, msgnum, TRUE, TRUE);
1714                 debug_print("fetched %s\n", tmp);
1715                 g_free(tmp);
1716         }
1717 }
1718
1719 static gint imap_add_msg(Folder *folder, FolderItem *dest,
1720                          const gchar *file, MsgFlags *flags)
1721 {
1722         gint ret;
1723         GSList file_list;
1724         MsgFileInfo fileinfo;
1725
1726         g_return_val_if_fail(file != NULL, -1);
1727
1728         fileinfo.msginfo = NULL;
1729         fileinfo.file = (gchar *)file;
1730         fileinfo.flags = flags;
1731         file_list.data = &fileinfo;
1732         file_list.next = NULL;
1733
1734         ret = imap_add_msgs(folder, dest, &file_list, NULL);
1735         return ret;
1736 }
1737
1738 static gint imap_add_msgs(Folder *folder, FolderItem *dest, GSList *file_list,
1739                    GHashTable *relation)
1740 {
1741         gchar *destdir;
1742         IMAPSession *session;
1743         guint32 last_uid = 0;
1744         GSList *cur;
1745         MsgFileInfo *fileinfo;
1746         gint ok = MAILIMAP_NO_ERROR;
1747         gint curnum = 0, total = 0;
1748         gboolean missing_uids = FALSE;
1749
1750         g_return_val_if_fail(folder != NULL, -1);
1751         g_return_val_if_fail(dest != NULL, -1);
1752         g_return_val_if_fail(file_list != NULL, -1);
1753
1754         debug_print("getting session...\n");
1755         session = imap_session_get(folder);
1756         if (!session) {
1757                 return -1;
1758         }
1759         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
1760         if (is_fatal(ok)) {
1761                 g_free(destdir);
1762                 return -1;
1763         }
1764         statusbar_print_all(_("Adding messages..."));
1765         total = g_slist_length(file_list);
1766         for (cur = file_list; cur != NULL; cur = cur->next) {
1767                 IMAPFlags iflags = 0;
1768                 guint32 new_uid = 0;
1769                 gchar *real_file = NULL;
1770                 fileinfo = (MsgFileInfo *)cur->data;
1771
1772                 statusbar_progress_all(curnum, total, total < 10 ? 1:10);
1773                 curnum++;
1774
1775                 if (fileinfo->flags) {
1776                         if (MSG_IS_MARKED(*fileinfo->flags))
1777                                 iflags |= IMAP_FLAG_FLAGGED;
1778                         if (MSG_IS_REPLIED(*fileinfo->flags))
1779                                 iflags |= IMAP_FLAG_ANSWERED;
1780                         if (MSG_IS_FORWARDED(*fileinfo->flags))
1781                                 iflags |= IMAP_FLAG_FORWARDED;
1782                         if (MSG_IS_SPAM(*fileinfo->flags))
1783                                 iflags |= IMAP_FLAG_SPAM;
1784                         else
1785                                 iflags |= IMAP_FLAG_HAM;
1786                         if (!MSG_IS_UNREAD(*fileinfo->flags))
1787                                 iflags |= IMAP_FLAG_SEEN;
1788
1789                 }
1790
1791                 if (real_file == NULL)
1792                         real_file = g_strdup(fileinfo->file);
1793
1794                 if (folder_has_parent_of_type(dest, F_QUEUE) ||
1795                     folder_has_parent_of_type(dest, F_OUTBOX) ||
1796                     folder_has_parent_of_type(dest, F_DRAFT) ||
1797                     folder_has_parent_of_type(dest, F_TRASH))
1798                         iflags |= IMAP_FLAG_SEEN;
1799
1800                 ok = imap_cmd_append(session, IMAP_FOLDER_ITEM(dest), destdir, real_file, iflags,
1801                                      &new_uid);
1802
1803                 if (ok != MAILIMAP_NO_ERROR) {
1804                         g_warning("can't append message %s", real_file);
1805                         g_free(real_file);
1806                         g_free(destdir);
1807                         statusbar_progress_all(0,0,0);
1808                         statusbar_pop_all();
1809                         return -1;
1810                 } else {
1811                         debug_print("appended new message as %d\n", new_uid);
1812                         /* put the local file in the imapcache, so that we don't
1813                          * have to fetch it back later. */
1814
1815                         if (new_uid == 0) {
1816                                 missing_uids = TRUE;
1817                                 debug_print("Missing UID (0)\n");
1818                         }
1819                         if (new_uid > 0) {
1820                                 gchar *cache_path = folder_item_get_path(dest);
1821                                 if (!is_dir_exist(cache_path))
1822                                         make_dir_hier(cache_path);
1823                                 if (is_dir_exist(cache_path)) {
1824                                         gchar *cache_file = g_strconcat(
1825                                                 cache_path, G_DIR_SEPARATOR_S,
1826                                                 itos(new_uid), NULL);
1827                                         copy_file(real_file, cache_file, TRUE);
1828                                         debug_print("got UID %d, copied to cache: %s\n", new_uid, cache_file);
1829                                         g_free(cache_file);
1830                                 }
1831                                 g_free(cache_path);
1832                         }
1833                 }
1834
1835                 if (relation != NULL)
1836                         g_hash_table_insert(relation, fileinfo->msginfo != NULL ?
1837                                           (gpointer) fileinfo->msginfo : (gpointer) fileinfo,
1838                                           GINT_TO_POINTER(new_uid));
1839                 if (last_uid < new_uid) {
1840                         last_uid = new_uid;
1841                 }
1842
1843                 g_free(real_file);
1844         }
1845
1846         statusbar_progress_all(0,0,0);
1847         statusbar_pop_all();
1848
1849
1850         g_free(destdir);
1851
1852         imap_scan_required(folder, dest);
1853
1854         session = imap_session_get(folder);
1855         if (!session) {
1856                 return -1;
1857         }
1858         if (missing_uids) {
1859                 gint a;
1860                 ok = imap_select(session, IMAP_FOLDER(folder), dest,
1861                          &a, NULL, NULL, NULL, NULL, FALSE);
1862         }
1863         return last_uid;
1864 }
1865
1866 static GSList *flatten_mailimap_set(struct mailimap_set * set)
1867 {
1868         GSList *result = NULL;
1869         clistiter *list;
1870         guint32 start, end, t;
1871         GSList *cur;
1872
1873         if (!set || !set->set_list)
1874                 return NULL;
1875
1876         for (list = clist_begin(set->set_list); list; list = clist_next(list)) {
1877                 struct mailimap_set_item *item = (struct mailimap_set_item *)clist_content(list);
1878                 start = item->set_first;
1879                 end = item->set_last;
1880                 if (start <= end) {
1881                         for (t = start; t <= end; t++) {
1882                                 result = g_slist_prepend(result, GINT_TO_POINTER(t));
1883                         }
1884                 }
1885         }
1886         result = g_slist_reverse(result);
1887         if (debug_get_mode()) {
1888                 debug_print("flat imap set: ");
1889                 for (cur = result; cur; cur = cur->next) {
1890                         debug_print("%d ", GPOINTER_TO_INT(cur->data));
1891                 }
1892                 debug_print("\n");
1893         }
1894
1895         return result;
1896 }
1897 static gint imap_do_copy_msgs(Folder *folder, FolderItem *dest,
1898                               MsgInfoList *msglist, GHashTable *relation,
1899                               gboolean same_dest_ok)
1900 {
1901         FolderItem *src;
1902         gchar *destdir;
1903         GSList *seq_list, *cur;
1904         MsgInfo *msginfo;
1905         IMAPSession *session;
1906         gint ok = MAILIMAP_NO_ERROR;
1907         GHashTable *uid_hash;
1908         gint last_num = 0;
1909
1910         g_return_val_if_fail(folder != NULL, -1);
1911         g_return_val_if_fail(dest != NULL, -1);
1912         g_return_val_if_fail(msglist != NULL, -1);
1913
1914         debug_print("getting session...\n");
1915         session = imap_session_get(folder);
1916
1917         if (!session) {
1918                 return -1;
1919         }
1920
1921         msginfo = (MsgInfo *)msglist->data;
1922         src = msginfo->folder;
1923         if (!same_dest_ok && src == dest) {
1924                 g_warning("the src folder is identical to the dest.");
1925                 return -1;
1926         }
1927
1928         if (src->folder != dest->folder) {
1929                 GSList *infolist = NULL, *cur;
1930                 int res = -1;
1931                 for (cur = msglist; cur; cur = cur->next) {
1932                         msginfo = (MsgInfo *)cur->data;
1933                         MsgFileInfo *fileinfo = g_new0(MsgFileInfo, 1);
1934                         fileinfo->file = procmsg_get_message_file(msginfo);
1935                         fileinfo->flags = &(msginfo->flags);
1936                         infolist = g_slist_prepend(infolist, fileinfo);
1937                 }
1938                 infolist = g_slist_reverse(infolist);
1939                 res = folder_item_add_msgs(dest, infolist, FALSE);
1940                 for (cur = infolist; cur; cur = cur->next) {
1941                         MsgFileInfo *info = (MsgFileInfo *)cur->data;
1942                         g_free(info->file);
1943                         g_free(info);
1944                 }
1945                 g_slist_free(infolist);
1946                 return res;
1947         }
1948
1949         lock_session(session); /* unlocked later in the function */
1950
1951         ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
1952                          NULL, NULL, NULL, NULL, NULL, FALSE);
1953         if (ok != MAILIMAP_NO_ERROR) {
1954                 return ok;
1955         }
1956
1957         unlock_session(session);
1958
1959         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
1960
1961         if (is_fatal(ok)) {
1962                 g_free(destdir);
1963                 return ok;
1964         }
1965
1966         seq_list = imap_get_lep_set_from_msglist(IMAP_FOLDER(folder), msglist);
1967         uid_hash = g_hash_table_new(g_direct_hash, g_direct_equal);
1968
1969         statusbar_print_all(_("Copying messages..."));
1970         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
1971                 struct mailimap_set * seq_set;
1972                 struct mailimap_set * source = NULL;
1973                 struct mailimap_set * dest = NULL;
1974                 seq_set = cur->data;
1975
1976                 debug_print("Copying messages from %s to %s ...\n",
1977                             src->path, destdir);
1978
1979                 lock_session(session); /* unlocked later in the function */
1980                 ok = imap_cmd_copy(session, seq_set, destdir,
1981                         &source, &dest);
1982
1983                 if (is_fatal(ok)) {
1984                         session = NULL;
1985                 }
1986
1987                 if (ok == MAILIMAP_NO_ERROR) {
1988                         unlock_session(session);
1989                         if (relation && source && dest) {
1990                                 GSList *s_list = flatten_mailimap_set(source);
1991                                 GSList *d_list = flatten_mailimap_set(dest);
1992                                 GSList *s_cur, *d_cur;
1993                                 if (g_slist_length(s_list) == g_slist_length(d_list)) {
1994
1995                                         for (s_cur = s_list, d_cur = d_list;
1996                                              s_cur && d_cur;
1997                                              s_cur = s_cur->next, d_cur = d_cur->next) {
1998                                                 g_hash_table_insert(uid_hash, s_cur->data, d_cur->data);
1999                                         }
2000
2001                                 } else {
2002                                         debug_print("hhhmm, source list length != dest list length.\n");
2003                                 }
2004                                 g_slist_free(s_list);
2005                                 g_slist_free(d_list);
2006                         }
2007                 }
2008
2009
2010                 if (source)
2011                         mailimap_set_free(source);
2012                 if (dest)
2013                         mailimap_set_free(dest);
2014
2015                 if (ok != MAILIMAP_NO_ERROR) {
2016                         g_hash_table_destroy(uid_hash);
2017                         imap_lep_set_free(seq_list);
2018                         statusbar_pop_all();
2019                         return -1;
2020                 }
2021         }
2022
2023         for (cur = msglist; cur != NULL; cur = g_slist_next(cur)) {
2024                 MsgInfo *msginfo = (MsgInfo *)cur->data;
2025                 gpointer hashval;
2026
2027                 hashval = g_hash_table_lookup(uid_hash, GINT_TO_POINTER(msginfo->msgnum));
2028
2029                 if (hashval != NULL) {
2030                         gint num = GPOINTER_TO_INT(hashval);
2031                         g_hash_table_insert(relation, msginfo,
2032                                           GINT_TO_POINTER(num));
2033                         if (num > last_num)
2034                                 last_num = num;
2035                         debug_print("copied message %d as %d\n", msginfo->msgnum, num);
2036                         /* put the local file in the imapcache, so that we don't
2037                          * have to fetch it back later. */
2038                         if (num > 0) {
2039                                 gchar *cache_path = folder_item_get_path(msginfo->folder);
2040                                 gchar *real_file = g_strconcat(
2041                                         cache_path, G_DIR_SEPARATOR_S,
2042                                         itos(msginfo->msgnum), NULL);
2043                                 gchar *cache_file = NULL;
2044                                 g_free(cache_path);
2045                                 cache_path = folder_item_get_path(dest);
2046                                 cache_file = g_strconcat(
2047                                         cache_path, G_DIR_SEPARATOR_S,
2048                                         itos(num), NULL);
2049                                 if (!is_dir_exist(cache_path))
2050                                         make_dir_hier(cache_path);
2051                                 if (is_file_exist(real_file) && is_dir_exist(cache_path)) {
2052                                         if (copy_file(real_file, cache_file, TRUE) < 0)
2053                                                 debug_print("couldn't cache to %s: %s\n", cache_file,
2054                                                             strerror(errno));
2055                                         else
2056                                                 debug_print("copied to cache: %s\n", cache_file);
2057                                 }
2058                                 g_free(real_file);
2059                                 g_free(cache_file);
2060                                 g_free(cache_path);
2061                         }
2062                 } else
2063                         g_hash_table_insert(relation, msginfo,
2064                                           GINT_TO_POINTER(0));
2065         }
2066         statusbar_pop_all();
2067
2068         g_hash_table_destroy(uid_hash);
2069         imap_lep_set_free(seq_list);
2070
2071         g_free(destdir);
2072
2073         IMAP_FOLDER_ITEM(dest)->lastuid = 0;
2074         IMAP_FOLDER_ITEM(dest)->uid_next = 0;
2075         g_slist_free(IMAP_FOLDER_ITEM(dest)->uid_list);
2076         IMAP_FOLDER_ITEM(dest)->uid_list = NULL;
2077
2078         imap_scan_required(folder, dest);
2079         if (ok == MAILIMAP_NO_ERROR)
2080                 return last_num;
2081         else
2082                 return -1;
2083 }
2084
2085 static gint imap_copy_msg(Folder *folder, FolderItem *dest, MsgInfo *msginfo)
2086 {
2087         GSList msglist;
2088
2089         g_return_val_if_fail(msginfo != NULL, -1);
2090
2091         msglist.data = msginfo;
2092         msglist.next = NULL;
2093
2094         return imap_copy_msgs(folder, dest, &msglist, NULL);
2095 }
2096
2097 static gint imap_copy_msgs(Folder *folder, FolderItem *dest,
2098                     MsgInfoList *msglist, GHashTable *relation)
2099 {
2100         MsgInfo *msginfo;
2101         gint ret;
2102
2103         g_return_val_if_fail(folder != NULL, -1);
2104         g_return_val_if_fail(dest != NULL, -1);
2105         g_return_val_if_fail(msglist != NULL, -1);
2106
2107         msginfo = (MsgInfo *)msglist->data;
2108         g_return_val_if_fail(msginfo->folder != NULL, -1);
2109
2110         ret = imap_do_copy_msgs(folder, dest, msglist, relation, FALSE);
2111         return ret;
2112 }
2113
2114 static gboolean imap_matcher_type_is_local(gint matchertype)
2115 {
2116         switch (matchertype) {
2117         case MATCHCRITERIA_FROM:
2118         case MATCHCRITERIA_TO:
2119         case MATCHCRITERIA_CC:
2120         case MATCHCRITERIA_TO_OR_CC:
2121         case MATCHCRITERIA_SUBJECT:
2122         case MATCHCRITERIA_REFERENCES:
2123         case MATCHCRITERIA_MESSAGEID:
2124         case MATCHCRITERIA_INREPLYTO:
2125         case MATCHCRITERIA_AGE_GREATER:
2126         case MATCHCRITERIA_AGE_LOWER:
2127         case MATCHCRITERIA_FORWARDED:
2128         case MATCHCRITERIA_SPAM:
2129         case MATCHCRITERIA_UNREAD:
2130         case MATCHCRITERIA_NEW:
2131         case MATCHCRITERIA_MARKED:
2132         case MATCHCRITERIA_REPLIED:
2133         case MATCHCRITERIA_DELETED:
2134         case MATCHCRITERIA_SIZE_GREATER:
2135         case MATCHCRITERIA_SIZE_SMALLER:
2136         case MATCHCRITERIA_SIZE_EQUAL:
2137                 return TRUE;
2138         }
2139         return FALSE;
2140 }
2141
2142 static IMAPSearchKey* search_make_key(MatcherProp* match, gboolean* is_all)
2143 {
2144         if (match->matchtype == MATCHTYPE_MATCHCASE || match->matchtype == MATCHTYPE_MATCH) {
2145                 IMAPSearchKey* result = NULL;
2146                 gboolean invert = FALSE;
2147                 gint matchertype = match->criteria;
2148
2149                 if (is_all) {
2150                         *is_all = FALSE;
2151                 }
2152
2153                 switch (matchertype) {
2154                 case MATCHCRITERIA_NOT_NEW: invert = TRUE; matchertype = MATCHCRITERIA_NEW; break;
2155                 case MATCHCRITERIA_NOT_MARKED: invert = TRUE; matchertype = MATCHCRITERIA_MARKED; break;
2156                 case MATCHCRITERIA_NOT_FORWARDED: invert = TRUE; matchertype = MATCHCRITERIA_FORWARDED; break;
2157                 case MATCHCRITERIA_NOT_SPAM: invert = TRUE; matchertype = MATCHCRITERIA_SPAM; break;
2158                 case MATCHCRITERIA_NOT_SUBJECT: invert = TRUE; matchertype = MATCHCRITERIA_SUBJECT; break;
2159                 case MATCHCRITERIA_NOT_FROM: invert = TRUE; matchertype = MATCHCRITERIA_FROM; break;
2160                 case MATCHCRITERIA_NOT_TO: invert = TRUE; matchertype = MATCHCRITERIA_TO; break;
2161                 case MATCHCRITERIA_NOT_CC: invert = TRUE; matchertype = MATCHCRITERIA_CC; break;
2162                 case MATCHCRITERIA_NOT_REFERENCES: invert = TRUE; matchertype = MATCHCRITERIA_REFERENCES; break;
2163                 case MATCHCRITERIA_NOT_HEADER: invert = TRUE; matchertype = MATCHCRITERIA_HEADER; break;
2164                 case MATCHCRITERIA_NOT_TAG: invert = TRUE; matchertype = MATCHCRITERIA_TAG; break;
2165                 case MATCHCRITERIA_NOT_HEADERS_PART: invert = TRUE; matchertype = MATCHCRITERIA_HEADERS_PART; break;
2166                 case MATCHCRITERIA_NOT_HEADERS_CONT: invert = TRUE; matchertype = MATCHCRITERIA_HEADERS_CONT; break;
2167                 case MATCHCRITERIA_NOT_MESSAGE: invert = TRUE; matchertype = MATCHCRITERIA_MESSAGE; break;
2168                 case MATCHCRITERIA_NOT_BODY_PART: invert = TRUE; matchertype = MATCHCRITERIA_BODY_PART; break;
2169                 case MATCHCRITERIA_NOT_TO_AND_NOT_CC: invert = TRUE; matchertype = MATCHCRITERIA_TO_OR_CC; break;
2170                 case MATCHCRITERIA_NOT_MESSAGEID: invert = TRUE; matchertype = MATCHCRITERIA_MESSAGEID; break;
2171                 case MATCHCRITERIA_NOT_INREPLYTO: invert = TRUE; matchertype = MATCHCRITERIA_INREPLYTO; break;
2172                 }
2173
2174                 /*
2175                  * this aborts conversion even for predicates understood by the following code.
2176                  * while that might seem wasteful, claws local search for information listed below
2177                  * has proven faster than IMAP search plus network roundtrips. once this changes,
2178                  * consider removing these exceptions.
2179                  */
2180                 if (imap_matcher_type_is_local(matchertype))
2181                         return NULL;
2182
2183                 /* the Message-ID header is also cached */
2184                 if (matchertype == MATCHCRITERIA_HEADER && g_strcmp0("Message-ID", match->header) == 0) {
2185                         return NULL;
2186                 }
2187
2188                 switch (matchertype) {
2189                 case MATCHCRITERIA_FORWARDED:
2190                         result = imap_search_new(IMAP_SEARCH_CRITERIA_TAG, NULL, RTAG_FORWARDED, 0);
2191                         break;
2192
2193                 case MATCHCRITERIA_SPAM:
2194                         result = imap_search_new(IMAP_SEARCH_CRITERIA_TAG, NULL, RTAG_JUNK, 0);
2195                         break;
2196
2197                 case MATCHCRITERIA_MESSAGEID:
2198                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, "Message-ID", match->expr, 0);
2199                         break;
2200
2201                 case MATCHCRITERIA_INREPLYTO:
2202                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, "In-Reply-To", match->expr, 0);
2203                         break;
2204
2205                 case MATCHCRITERIA_REFERENCES:
2206                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, "References", match->expr, 0);
2207                         break;
2208
2209                 case MATCHCRITERIA_TO_OR_CC:
2210                         result = imap_search_or(
2211                                         imap_search_new(IMAP_SEARCH_CRITERIA_TO, NULL, match->expr, 0),
2212                                         imap_search_new(IMAP_SEARCH_CRITERIA_CC, NULL, match->expr, 0)
2213                                         );
2214                         break;
2215
2216                 case MATCHCRITERIA_HEADERS_PART:
2217                 case MATCHCRITERIA_HEADERS_CONT:
2218                         result = imap_search_and(
2219                                         imap_search_not(imap_search_new(IMAP_SEARCH_CRITERIA_BODY, NULL, match->expr, 0)),
2220                                         imap_search_new(IMAP_SEARCH_CRITERIA_MESSAGE, NULL, match->expr, 0)
2221                                         );
2222                         break;
2223
2224                 case MATCHCRITERIA_SIZE_EQUAL:
2225                         result = imap_search_and(
2226                                         imap_search_not(imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_SMALLER, NULL, NULL, match->value)),
2227                                         imap_search_not(imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_GREATER, NULL, NULL, match->value))
2228                                         );
2229                         break;
2230
2231                 case MATCHCRITERIA_NOT_UNREAD:
2232                         result = imap_search_new(IMAP_SEARCH_CRITERIA_READ, NULL, NULL, 0);
2233                         break;
2234
2235                 case MATCHCRITERIA_UNREAD:
2236                         result = imap_search_new(IMAP_SEARCH_CRITERIA_UNREAD, NULL, NULL, 0);
2237                         break;
2238
2239                 case MATCHCRITERIA_NEW:
2240                         result = imap_search_new(IMAP_SEARCH_CRITERIA_NEW, NULL, NULL, 0);
2241                         break;
2242
2243                 case MATCHCRITERIA_MARKED:
2244                         result = imap_search_new(IMAP_SEARCH_CRITERIA_MARKED, NULL, NULL, 0);
2245                         break;
2246
2247                 case MATCHCRITERIA_DELETED:
2248                         result = imap_search_new(IMAP_SEARCH_CRITERIA_DELETED, NULL, NULL, 0);
2249                         break;
2250
2251                 case MATCHCRITERIA_REPLIED:
2252                         result = imap_search_new(IMAP_SEARCH_CRITERIA_REPLIED, NULL, NULL, 0);
2253                         break;
2254
2255                 case MATCHCRITERIA_TAG:
2256                         {
2257                                 gchar *tmp = imap_utf8_to_modified_utf7(match->expr, TRUE);
2258                                 result = imap_search_new(IMAP_SEARCH_CRITERIA_TAG, NULL, tmp, 0);
2259                                 g_free(tmp);
2260                         }
2261                         break;
2262
2263                 case MATCHCRITERIA_SUBJECT:
2264                         result = imap_search_new(IMAP_SEARCH_CRITERIA_SUBJECT, NULL, match->expr, 0);
2265                         break;
2266
2267                 case MATCHCRITERIA_FROM:
2268                         result = imap_search_new(IMAP_SEARCH_CRITERIA_FROM, NULL, match->expr, 0);
2269                         break;
2270
2271                 case MATCHCRITERIA_TO:
2272                         result = imap_search_new(IMAP_SEARCH_CRITERIA_TO, NULL, match->expr, 0);
2273                         break;
2274
2275                 case MATCHCRITERIA_CC:
2276                         result = imap_search_new(IMAP_SEARCH_CRITERIA_CC, NULL, match->expr, 0);
2277                         break;
2278
2279                 case MATCHCRITERIA_AGE_GREATER:
2280                         result = imap_search_new(IMAP_SEARCH_CRITERIA_AGE_GREATER, NULL, NULL, match->value);
2281                         break;
2282
2283                 case MATCHCRITERIA_AGE_LOWER:
2284                         result = imap_search_new(IMAP_SEARCH_CRITERIA_AGE_LOWER, NULL, NULL, match->value);
2285                         break;
2286
2287                 case MATCHCRITERIA_BODY_PART:
2288                         result = imap_search_new(IMAP_SEARCH_CRITERIA_BODY, NULL, match->expr, 0);
2289                         break;
2290
2291                 case MATCHCRITERIA_MESSAGE:
2292                         result = imap_search_new(IMAP_SEARCH_CRITERIA_MESSAGE, NULL, match->expr, 0);
2293                         break;
2294
2295                 case MATCHCRITERIA_HEADER:
2296                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, match->header, match->expr, 0);
2297                         break;
2298
2299                 case MATCHCRITERIA_SIZE_GREATER:
2300                         result = imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_GREATER, NULL, NULL, match->value);
2301                         break;
2302
2303                 case MATCHCRITERIA_SIZE_SMALLER:
2304                         result = imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_SMALLER, NULL, NULL, match->value);
2305                         break;
2306
2307                 default:
2308                         result = imap_search_new(IMAP_SEARCH_CRITERIA_ALL, NULL, NULL, 0);
2309                         if (is_all) {
2310                                 *is_all = TRUE;
2311                         }
2312                         break;
2313                 }
2314
2315                 if (invert) {
2316                         result = imap_search_not(result);
2317                         if (is_all && *is_all) {
2318                                 *is_all = FALSE;
2319                         }
2320                 }
2321
2322                 return result;
2323         }
2324
2325         return NULL;
2326 }
2327
2328 static void imap_change_search_charset(IMAPFolder *folder)
2329 {
2330         /* If server supports charset in searches, but the last used one failed,
2331          * changed to the next preferred charset. If none are still available,
2332          * disable charset searches.
2333          * Charsets are tried in the following order:
2334          * UTF-8, locale's charset, UTF-7.
2335          */
2336
2337         if (folder->search_charset_supported) {
2338                 if (folder->search_charset && !strcmp(folder->search_charset, conv_get_locale_charset_str_no_utf8()))
2339                         folder->search_charset = "UTF-8";
2340                 else if (folder->search_charset && !strcmp(folder->search_charset, "UTF-8"))
2341                         folder->search_charset = "UTF-7";
2342                 else {
2343                         folder->search_charset = NULL;
2344                         folder->search_charset_supported = FALSE;
2345                 }
2346         }
2347 }
2348
2349 static MatcherProp *imap_matcher_prop_set_charset(IMAPFolder *folder,
2350                                                   MatcherProp *utf8_prop,
2351                                                   gchar **charset)
2352 {
2353         /* If the match is going to be done locally, or the criteria is on
2354          * tag (special-cased to modified-UTF-7), or the expression searched
2355          * is ASCII, don't bother converting.
2356          */
2357         if (imap_matcher_type_is_local(utf8_prop->criteria)
2358          || utf8_prop->criteria == MATCHCRITERIA_TAG
2359          || utf8_prop->criteria == MATCHCRITERIA_NOT_TAG
2360          || utf8_prop->expr == NULL
2361          || is_ascii_str(utf8_prop->expr))
2362                 return matcherprop_new(utf8_prop->criteria,
2363                                utf8_prop->header,
2364                                utf8_prop->matchtype,
2365                                utf8_prop->expr,
2366                                utf8_prop->value);
2367         else {
2368                 gchar *conv_expr = NULL;
2369
2370                 /* If the search is server-side and the server doesn't support
2371                  * searching with the charsets we handle, bail out.
2372                  */
2373                 if (folder->search_charset_supported == FALSE)
2374                         return NULL;
2375
2376                 /* Else, convert. */
2377                 if (*charset == NULL)
2378                         *charset = g_strdup(folder->search_charset);
2379
2380                 conv_expr = conv_codeset_strdup(utf8_prop->expr, CS_UTF_8, *charset);
2381
2382                 if (conv_expr == NULL)
2383                         conv_expr = g_strdup(utf8_prop->expr);
2384
2385                 return matcherprop_new(utf8_prop->criteria,
2386                                utf8_prop->header,
2387                                utf8_prop->matchtype,
2388                                conv_expr,
2389                                utf8_prop->value);
2390         }
2391 }
2392
2393 static gint     search_msgs             (Folder                 *folder,
2394                                          FolderItem             *container,
2395                                          MsgNumberList          **msgs,
2396                                          gboolean               *on_server,
2397                                          MatcherList            *predicate,
2398                                          SearchProgressNotify   progress_cb,
2399                                          gpointer               progress_data)
2400 {
2401         IMAPSearchKey* key = NULL;
2402         GSList* cur;
2403         int result = -1;
2404         clist* uidlist = NULL;
2405         gboolean server_filtering_useless = FALSE;
2406         IMAPSession *session;
2407         gchar *charset_to_use = NULL;
2408
2409         if (on_server == NULL || !*on_server) {
2410                 return folder_item_search_msgs_local(folder, container, msgs, on_server,
2411                                 predicate, progress_cb, progress_data);
2412         }
2413
2414         for (cur = predicate->matchers; cur != NULL; cur = cur->next) {
2415                 IMAPSearchKey* matcherPart = NULL;
2416                 MatcherProp* prop = (MatcherProp*) cur->data;
2417                 gboolean is_all;
2418                 MatcherProp *imap_prop = imap_matcher_prop_set_charset(IMAP_FOLDER(folder), prop, &charset_to_use);
2419
2420                 if (imap_prop == NULL) {
2421                         /* Couldn't convert matcherprop to IMAP - probably not ascii
2422                          * and server doesn't support the charsets we do. */
2423                          return -1;
2424                 }
2425
2426                 matcherPart = search_make_key(imap_prop, &is_all);
2427
2428                 matcherprop_free(imap_prop);
2429
2430                 if (on_server) {
2431                         *on_server &= matcherPart != NULL && prop->matchtype == MATCHTYPE_MATCHCASE;
2432                 }
2433
2434                 if (matcherPart) {
2435                         if (key == NULL) {
2436                                 key = matcherPart;
2437                                 server_filtering_useless = is_all;
2438                         } else if (predicate->bool_and) {
2439                                 key = imap_search_and(key, matcherPart);
2440                                 server_filtering_useless &= is_all;
2441                         } else {
2442                                 key = imap_search_or(key, matcherPart);
2443                                 server_filtering_useless |= is_all;
2444                         }
2445                 }
2446         }
2447
2448         if (server_filtering_useless) {
2449                 imap_search_free(key);
2450                 key = NULL;
2451         }
2452
2453         if (key == NULL && progress_cb != NULL) {
2454                 GSList* cur;
2455                 GSList* list;
2456                 int count = 0;
2457
2458                 progress_cb(progress_data, TRUE, 0, 0, container->total_msgs);
2459                 progress_cb(progress_data, TRUE, container->total_msgs, 0, container->total_msgs);
2460
2461                 list = folder_item_get_msg_list(container);
2462                 for (cur = list; cur != NULL; cur = cur->next) {
2463                         *msgs = g_slist_prepend(*msgs, GUINT_TO_POINTER(((MsgInfo*) cur->data)->msgnum));
2464                         count++;
2465                 }
2466                 procmsg_msg_list_free(list);
2467
2468                 *msgs = g_slist_reverse(*msgs);
2469
2470                 return count;
2471         }
2472
2473         session = imap_session_get(folder);
2474         if (!session) {
2475                 return -1;
2476         }
2477         result = imap_select(session, IMAP_FOLDER(folder), FOLDER_ITEM(container),
2478                          NULL, NULL, NULL, NULL, NULL, TRUE);
2479         if (result != MAILIMAP_NO_ERROR)
2480                 return -1;
2481
2482         if (progress_cb)
2483                 progress_cb(progress_data, TRUE, 0, 0, container->total_msgs);
2484         result = imap_threaded_search(folder, IMAP_SEARCH_TYPE_KEYED, key, charset_to_use, NULL, &uidlist);
2485         if (progress_cb)
2486                 progress_cb(progress_data, TRUE, container->total_msgs, 0, container->total_msgs);
2487
2488         if (result == MAILIMAP_ERROR_PROTOCOL) {
2489                 debug_print("search_msgs - got protocol error, aborting\n");
2490                 imap_handle_error(SESSION(session), NULL, result);
2491                 alertpanel_error_log(_("Search failed due to server error."));
2492                 return -1;
2493         } if (result == MAILIMAP_NO_ERROR) {
2494                 gint result = 0;
2495
2496                 *msgs = imap_uid_list_from_lep(uidlist, &result);
2497
2498                 mailimap_search_result_free(uidlist);
2499
2500                 if (charset_to_use != NULL)
2501                         g_free(charset_to_use);
2502
2503                 return result;
2504         } else if (charset_to_use != NULL) {
2505                 /* If search failed and was on an 8-bit string, try the next
2506                  * available charset to search if there still are some.
2507                  */
2508                 g_free(charset_to_use);
2509
2510                 imap_change_search_charset(IMAP_FOLDER(folder));
2511                 if (IMAP_FOLDER(folder)->search_charset_supported)
2512                         return search_msgs(folder, container, msgs, on_server, predicate,
2513                                    progress_cb, progress_data);
2514                 else {
2515                         imap_handle_error(SESSION(session), NULL, result);
2516                         return -1;
2517                 }
2518         } else {
2519                 imap_handle_error(SESSION(session), NULL, result);
2520                 return -1;
2521         }
2522 }
2523
2524
2525 static gint imap_do_remove_msgs(Folder *folder, FolderItem *dest,
2526                                 MsgInfoList *msglist, GHashTable *relation)
2527 {
2528         gchar *destdir, *dir;
2529         GSList *numlist = NULL, *cur;
2530         MsgInfo *msginfo;
2531         IMAPSession *session;
2532         gint ok = MAILIMAP_NO_ERROR;
2533
2534         g_return_val_if_fail(folder != NULL, -1);
2535         g_return_val_if_fail(dest != NULL, -1);
2536         g_return_val_if_fail(msglist != NULL, -1);
2537
2538         debug_print("getting session...\n");
2539         session = imap_session_get(folder);
2540         if (!session) {
2541                 return -1;
2542         }
2543
2544         lock_session(session); /* unlocked later in the function */
2545
2546         msginfo = (MsgInfo *)msglist->data;
2547
2548         ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
2549                          NULL, NULL, NULL, NULL, NULL, FALSE);
2550         if (ok != MAILIMAP_NO_ERROR) {
2551                 return ok;
2552         }
2553
2554         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
2555         if (is_fatal(ok)) {
2556                 g_free(destdir);
2557                 return ok;
2558         }
2559         for (cur = msglist; cur; cur = cur->next) {
2560                 msginfo = (MsgInfo *)cur->data;
2561                 if (!MSG_IS_DELETED(msginfo->flags))
2562                         numlist = g_slist_prepend(numlist, GINT_TO_POINTER(msginfo->msgnum));
2563         }
2564         numlist = g_slist_reverse(numlist);
2565
2566         if (numlist != NULL) {
2567                 ok = imap_set_message_flags
2568                         (session, IMAP_FOLDER_ITEM(msginfo->folder), numlist, IMAP_FLAG_DELETED, NULL, TRUE);
2569                 if (ok != MAILIMAP_NO_ERROR) {
2570                         log_warning(LOG_PROTOCOL, _("can't set deleted flags\n"));
2571                         g_free(destdir);
2572                         return ok;
2573                 }
2574         } /* else we just need to expunge */
2575         ok = imap_cmd_expunge(session);
2576         if (ok != MAILIMAP_NO_ERROR) {
2577                 log_warning(LOG_PROTOCOL, _("can't expunge\n"));
2578                 g_free(destdir);
2579                 return ok;
2580         }
2581
2582         session->folder_content_changed = TRUE;
2583         unlock_session(session);
2584
2585         dir = folder_item_get_path(msginfo->folder);
2586         if (is_dir_exist(dir)) {
2587                 for (cur = msglist; cur; cur = cur->next) {
2588                         msginfo = (MsgInfo *)cur->data;
2589                         remove_numbered_files(dir, msginfo->msgnum, msginfo->msgnum);
2590                 }
2591         }
2592         g_free(dir);
2593
2594         g_slist_free(numlist);
2595
2596         imap_scan_required(folder, dest);
2597
2598         g_free(destdir);
2599
2600         return 0;
2601 }
2602
2603 static gint imap_remove_msgs(Folder *folder, FolderItem *dest,
2604                     MsgInfoList *msglist, GHashTable *relation)
2605 {
2606         MsgInfo *msginfo;
2607
2608         g_return_val_if_fail(folder != NULL, -1);
2609         g_return_val_if_fail(dest != NULL, -1);
2610         if (msglist == NULL)
2611                 return 0;
2612
2613         msginfo = (MsgInfo *)msglist->data;
2614         g_return_val_if_fail(msginfo->folder != NULL, -1);
2615
2616         return imap_do_remove_msgs(folder, dest, msglist, relation);
2617 }
2618
2619 static gint imap_remove_all_msg(Folder *folder, FolderItem *item)
2620 {
2621         GSList *list = folder_item_get_msg_list(item);
2622         gint res = imap_remove_msgs(folder, item, list, NULL);
2623         procmsg_msg_list_free(list);
2624         return res;
2625 }
2626
2627 static gboolean imap_is_msg_changed(Folder *folder, FolderItem *item,
2628                                     MsgInfo *msginfo)
2629 {
2630         /* TODO: properly implement this method */
2631         return FALSE;
2632 }
2633
2634 static gint imap_close(Folder *folder, FolderItem *item)
2635 {
2636         return 0;
2637 }
2638
2639 static gint imap_scan_tree_real(Folder *folder, gboolean subs_only)
2640 {
2641         FolderItem *item = NULL;
2642         IMAPSession *session;
2643         gchar *root_folder = NULL;
2644
2645         g_return_val_if_fail(folder != NULL, -1);
2646         g_return_val_if_fail(folder->account != NULL, -1);
2647
2648         debug_print("getting session...\n");
2649         session = imap_session_get(folder);
2650         if (!session) {
2651                 if (!folder->node) {
2652                         folder_tree_destroy(folder);
2653                         item = folder_item_new(folder, folder->name, NULL);
2654                         item->folder = folder;
2655                         folder->node = item->node = g_node_new(item);
2656                 }
2657                 return -1;
2658         }
2659
2660         if (folder->account->imap_dir && *folder->account->imap_dir) {
2661                 gchar *real_path;
2662                 int r = MAILIMAP_NO_ERROR;
2663                 clist * lep_list;
2664
2665                 Xstrdup_a(root_folder, folder->account->imap_dir, {return -1;});
2666                 extract_quote(root_folder, '"');
2667                 subst_char(root_folder,
2668                            imap_get_path_separator(session, IMAP_FOLDER(folder),
2669                                                    root_folder, &r),
2670                            '/');
2671                 if (is_fatal(r))
2672                         return -1;
2673                 strtailchomp(root_folder, '/');
2674                 real_path = imap_get_real_path
2675                         (session, IMAP_FOLDER(folder), root_folder, &r);
2676                 if (is_fatal(r)) {
2677                         g_free(real_path);
2678                         return -1;
2679                 }
2680                 debug_print("IMAP root directory: %s\n", real_path);
2681
2682                 /* check if root directory exist */
2683
2684                 r = imap_threaded_list(session->folder, "", real_path,
2685                                        &lep_list);
2686
2687                 if (r != MAILIMAP_NO_ERROR)
2688                         imap_handle_error(SESSION(session), NULL, r);
2689
2690                 if ((r != MAILIMAP_NO_ERROR) || (clist_count(lep_list) == 0)) {
2691                         if (!folder->node) {
2692                                 item = folder_item_new(folder, folder->name, NULL);
2693                                 item->folder = folder;
2694                                 folder->node = item->node = g_node_new(item);
2695                         }
2696                         return -1;
2697                 }
2698                 mailimap_list_result_free(lep_list);
2699
2700                 g_free(real_path);
2701         }
2702
2703         if (folder->node)
2704                 item = FOLDER_ITEM(folder->node->data);
2705
2706         if (item && !item->path && root_folder) {
2707                 item->path = g_strdup(root_folder);
2708         }
2709
2710         if (!item || ((item->path || root_folder) &&
2711                       strcmp2(item->path, root_folder) != 0)) {
2712                 folder_tree_destroy(folder);
2713                 item = folder_item_new(folder, folder->name, root_folder);
2714                 item->folder = folder;
2715                 folder->node = item->node = g_node_new(item);
2716         }
2717
2718         imap_scan_tree_recursive(session, FOLDER_ITEM(folder->node->data), subs_only);
2719         imap_create_missing_folders(folder);
2720
2721         return 0;
2722 }
2723
2724 static gint imap_scan_tree(Folder *folder)
2725 {
2726         gboolean subs_only = FALSE;
2727         if (folder->account) {
2728                 debug_print(" scanning only subs %d\n", folder->account->imap_subsonly);
2729                 subs_only = folder->account->imap_subsonly;
2730         }
2731         return imap_scan_tree_real(folder, subs_only);
2732 }
2733
2734 static gint imap_scan_tree_recursive(IMAPSession *session, FolderItem *item, gboolean subs_only)
2735 {
2736         Folder *folder;
2737         IMAPFolder *imapfolder;
2738         FolderItem *new_item;
2739         GSList *item_list, *cur;
2740         GNode *node;
2741         gchar *real_path;
2742         gchar *wildcard_path;
2743         gchar separator;
2744         gchar wildcard[3];
2745         clist * lep_list;
2746         int r = MAILIMAP_NO_ERROR;
2747
2748         g_return_val_if_fail(item != NULL, -1);
2749         g_return_val_if_fail(item->folder != NULL, -1);
2750         g_return_val_if_fail(item->no_sub == FALSE, -1);
2751
2752         folder = item->folder;
2753         imapfolder = IMAP_FOLDER(folder);
2754
2755         separator = imap_get_path_separator(session, imapfolder, item->path, &r);
2756         if (is_fatal(r))
2757                 return r;
2758
2759         if (folder->ui_func)
2760                 folder->ui_func(folder, item, folder->ui_func_data);
2761
2762         if (item->path) {
2763                 wildcard[0] = separator;
2764                 wildcard[1] = '%';
2765                 wildcard[2] = '\0';
2766                 real_path = imap_get_real_path(session, imapfolder, item->path, &r);
2767                 if (is_fatal(r)) {
2768                         g_free(real_path);
2769                         return r;
2770                 }
2771         } else {
2772                 wildcard[0] = '%';
2773                 wildcard[1] = '\0';
2774                 real_path = g_strdup("");
2775         }
2776
2777         Xstrcat_a(wildcard_path, real_path, wildcard,
2778                   {g_free(real_path); return MAILIMAP_ERROR_BAD_STATE;});
2779         lep_list = NULL;
2780
2781         if (subs_only)
2782                 r = imap_threaded_lsub(folder, "", wildcard_path, &lep_list);
2783         else
2784                 r = imap_threaded_list(folder, "", wildcard_path, &lep_list);
2785
2786         if (r != MAILIMAP_NO_ERROR) {
2787                 imap_handle_error(SESSION(session), NULL, r);
2788                 item_list = NULL;
2789                 g_free(real_path);
2790                 return r;
2791         }
2792         else {
2793                 item_list = imap_list_from_lep(imapfolder,
2794                                                lep_list, real_path, FALSE);
2795                 mailimap_list_result_free(lep_list);
2796         }
2797
2798         g_free(real_path);
2799
2800         node = item->node->children;
2801         while (node != NULL) {
2802                 FolderItem *old_item = FOLDER_ITEM(node->data);
2803                 GNode *next = node->next;
2804
2805                 new_item = NULL;
2806                 for (cur = item_list; cur != NULL; cur = cur->next) {
2807                         FolderItem *cur_item = FOLDER_ITEM(cur->data);
2808                         if (!strcmp2(old_item->path, cur_item->path)) {
2809                                 new_item = cur_item;
2810                                 break;
2811                         }
2812                 }
2813                 if (!new_item) {
2814                         if (old_item && old_item->path && !strcasecmp(old_item->path, "INBOX")) {
2815                                 debug_print("not removing INBOX\n");
2816                         } else {
2817                                 debug_print("folder '%s' not found. removing...\n",
2818                                             old_item->path);
2819                                 folder_item_remove(old_item);
2820                         }
2821                 } else {
2822                         old_item->no_sub = new_item->no_sub;
2823                         old_item->no_select = new_item->no_select;
2824                         if (old_item->no_sub == TRUE && node->children) {
2825                                 debug_print("folder '%s' doesn't have "
2826                                             "subfolders. removing...\n",
2827                                             old_item->path);
2828                                 folder_item_remove_children(old_item);
2829                         }
2830                 }
2831
2832                 node = next;
2833         }
2834
2835         for (cur = item_list; cur != NULL; cur = cur->next) {
2836                 FolderItem *cur_item = FOLDER_ITEM(cur->data);
2837                 new_item = NULL;
2838
2839                 for (node = item->node->children; node != NULL;
2840                      node = node->next) {
2841                         if (!strcmp2(FOLDER_ITEM(node->data)->path,
2842                                      cur_item->path)) {
2843                                 new_item = FOLDER_ITEM(node->data);
2844                                 folder_item_destroy(cur_item);
2845                                 cur_item = NULL;
2846                                 break;
2847                         }
2848                 }
2849                 if (!new_item) {
2850                         new_item = cur_item;
2851                         debug_print("new folder '%s' found.\n", new_item->path);
2852                         folder_item_append(item, new_item);
2853                 }
2854
2855                 if (!strcasecmp(new_item->path, "INBOX")) {
2856                         new_item->stype = F_INBOX;
2857                         folder->inbox = new_item;
2858                 } else if (!folder_item_parent(item) || item->stype == F_INBOX) {
2859                         gchar *base;
2860
2861                         base = g_path_get_basename(new_item->path);
2862
2863                         if (!folder->outbox && !g_ascii_strcasecmp(base, "Sent")) {
2864                                 new_item->stype = F_OUTBOX;
2865                                 folder->outbox = new_item;
2866                         } else if (!folder->draft && (!g_ascii_strcasecmp(base, "Drafts") || !g_ascii_strcasecmp(base, "Draft"))) {
2867                                 new_item->stype = F_DRAFT;
2868                                 folder->draft = new_item;
2869                         } else if (!folder->queue && !g_ascii_strcasecmp(base, "Queue")) {
2870                                 new_item->stype = F_QUEUE;
2871                                 folder->queue = new_item;
2872                         } else if (!folder->trash && !g_ascii_strcasecmp(base, "Trash")) {
2873                                 new_item->stype = F_TRASH;
2874                                 folder->trash = new_item;
2875                         }
2876                         g_free(base);
2877                 }
2878
2879                 if (new_item->no_sub == FALSE)
2880                         imap_scan_tree_recursive(session, new_item, subs_only);
2881         }
2882
2883         g_slist_free(item_list);
2884
2885         return MAILIMAP_NO_ERROR;
2886 }
2887
2888 GList *imap_scan_subtree(Folder *folder, FolderItem *item, gboolean unsubs_only, gboolean recursive)
2889 {
2890         IMAPSession *session = imap_session_get(folder);
2891         gchar *real_path;
2892         gchar *wildcard_path;
2893         gchar separator;
2894         gchar wildcard[3];
2895         clist * lep_list;
2896         GSList *item_list = NULL, *cur;
2897         GList *child_list = NULL, *tmplist = NULL;
2898         GSList *sub_list = NULL;
2899         int r = MAILIMAP_NO_ERROR;
2900
2901         if (!session)
2902                 return NULL;
2903
2904         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &r);
2905         if (is_fatal(r))
2906                 return NULL;
2907
2908         if (item->path) {
2909                 wildcard[0] = separator;
2910                 wildcard[1] = '%';
2911                 wildcard[2] = '\0';
2912                 real_path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &r);
2913                 if (is_fatal(r)) {
2914                         g_free(real_path);
2915                         return NULL;
2916                 }
2917         } else {
2918                 wildcard[0] = '%';
2919                 wildcard[1] = '\0';
2920                 real_path = g_strdup("");
2921         }
2922
2923         Xstrcat_a(wildcard_path, real_path, wildcard,
2924                   {g_free(real_path); return NULL;});
2925         lep_list = NULL;
2926
2927         if (unsubs_only)
2928                 statusbar_print_all(_("Looking for unsubscribed folders in %s..."),
2929                                 item->path?item->path:item->name);
2930         else
2931                 statusbar_print_all(_("Looking for subfolders of %s..."),
2932                                 item->path?item->path:item->name);
2933
2934         r = imap_threaded_list(folder, "", wildcard_path, &lep_list);
2935         if (r) {
2936                 g_free(real_path);
2937                 statusbar_pop_all();
2938                 return NULL;
2939         }
2940         item_list = imap_list_from_lep(IMAP_FOLDER(folder),
2941                                lep_list, real_path, FALSE);
2942         mailimap_list_result_free(lep_list);
2943
2944         for (cur = item_list; cur != NULL; cur = cur->next) {
2945                 FolderItem *cur_item = FOLDER_ITEM(cur->data);
2946                 if (recursive) {
2947                         tmplist = imap_scan_subtree(folder, cur_item,
2948                                         unsubs_only, recursive);
2949                         if (tmplist)
2950                                 child_list = g_list_concat(child_list, tmplist);
2951                 }
2952                 child_list = g_list_prepend(child_list,
2953                                 imap_get_real_path(session,
2954                                         IMAP_FOLDER(folder), cur_item->path, &r));
2955                 if (is_fatal(r)) {
2956                         g_free(real_path);
2957                         statusbar_pop_all();
2958                         return NULL;
2959                 }
2960                 folder_item_destroy(cur_item);
2961         }
2962         child_list = g_list_reverse(child_list);
2963         g_slist_free(item_list);
2964
2965         if (unsubs_only) {
2966                 r = imap_threaded_lsub(folder, "", wildcard_path, &lep_list);
2967                 if (r) {
2968                         g_free(real_path);
2969                         statusbar_pop_all();
2970                         return NULL;
2971                 }
2972                 sub_list = imap_list_from_lep(IMAP_FOLDER(folder),
2973                                        lep_list, real_path, FALSE);
2974                 mailimap_list_result_free(lep_list);
2975
2976                 for (cur = sub_list; cur != NULL; cur = cur->next) {
2977                         FolderItem *cur_item = FOLDER_ITEM(cur->data);
2978                         GList *oldlitem = NULL;
2979                         gchar *tmp = imap_get_real_path(session,
2980                                         IMAP_FOLDER(folder), cur_item->path, &r);
2981                         if (r) {
2982                                 g_free(real_path);
2983                                 statusbar_pop_all();
2984                                 g_free(tmp);
2985                                 return NULL;
2986                         }
2987                         folder_item_destroy(cur_item);
2988                         oldlitem = g_list_find_custom(
2989                                         child_list, tmp, (GCompareFunc)strcmp2);
2990                         if (oldlitem) {
2991                                 child_list = g_list_remove_link(child_list, oldlitem);
2992                                 g_free(oldlitem->data);
2993                                 g_list_free(oldlitem);
2994                         }
2995                         g_free(tmp);
2996                 }
2997         }
2998
2999         g_free(real_path);
3000         statusbar_pop_all();
3001
3002         return child_list;
3003 }
3004
3005 static gint imap_create_tree(Folder *folder)
3006 {
3007         g_return_val_if_fail(folder != NULL, -1);
3008         g_return_val_if_fail(folder->node != NULL, -1);
3009         g_return_val_if_fail(folder->node->data != NULL, -1);
3010         g_return_val_if_fail(folder->account != NULL, -1);
3011
3012         imap_scan_tree(folder);
3013         imap_create_missing_folders(folder);
3014
3015         return 0;
3016 }
3017
3018 static void imap_create_missing_folders(Folder *folder)
3019 {
3020         g_return_if_fail(folder != NULL);
3021
3022         if (!folder->inbox)
3023                 folder->inbox = imap_create_special_folder
3024                         (folder, F_INBOX, "INBOX");
3025         if (!folder->trash)
3026                 folder->trash = imap_create_special_folder
3027                         (folder, F_TRASH, "Trash");
3028         if (!folder->queue)
3029                 folder->queue = imap_create_special_folder
3030                         (folder, F_QUEUE, "Queue");
3031         if (!folder->outbox)
3032                 folder->outbox = imap_create_special_folder
3033                         (folder, F_OUTBOX, "Sent");
3034         if (!folder->draft)
3035                 folder->draft = imap_create_special_folder
3036                         (folder, F_DRAFT, "Drafts");
3037 }
3038
3039 static FolderItem *imap_create_special_folder(Folder *folder,
3040                                               SpecialFolderItemType stype,
3041                                               const gchar *name)
3042 {
3043         FolderItem *item;
3044         FolderItem *new_item;
3045
3046         g_return_val_if_fail(folder != NULL, NULL);
3047         g_return_val_if_fail(folder->node != NULL, NULL);
3048         g_return_val_if_fail(folder->node->data != NULL, NULL);
3049         g_return_val_if_fail(folder->account != NULL, NULL);
3050         g_return_val_if_fail(name != NULL, NULL);
3051
3052         item = FOLDER_ITEM(folder->node->data);
3053         new_item = imap_create_folder(folder, item, name);
3054
3055         if (!new_item) {
3056                 g_warning("Can't create '%s'", name);
3057                 if (!folder->inbox) return NULL;
3058
3059                 new_item = imap_create_folder(folder, folder->inbox, name);
3060                 if (!new_item)
3061                         g_warning("Can't create '%s' under INBOX", name);
3062                 else
3063                         new_item->stype = stype;
3064         } else
3065                 new_item->stype = stype;
3066
3067         return new_item;
3068 }
3069
3070 #ifdef G_OS_WIN32
3071 static gchar *imap_encode_unsafe_chars(const gchar *str)
3072 {
3073         gchar *ret = NULL, *o_ret;
3074         gchar *i;
3075         if (!str)
3076                 return NULL;
3077         ret = g_malloc(3*strlen(str)+1);
3078         o_ret = ret;
3079         for (i = (gchar *)str; *i; i++) {
3080                 switch(*i) {
3081                         case ':':
3082                         case '|':
3083                         case '<':
3084                         case '>':
3085                         case '*':
3086                         case '?':
3087                         case '#':
3088                                 *ret++ = '%';
3089                                 *ret++ = '0'+(*i/10);
3090                                 *ret++ = '0'+(*i%10);
3091                                 break;
3092                         default:
3093                                 *ret++ = *i;
3094                 }
3095         }
3096         *ret++ = '\0';
3097         return o_ret;
3098 }
3099 #endif
3100 static gchar *imap_item_get_path(Folder *folder, FolderItem *item)
3101 {
3102         gchar *folder_path, *path;
3103         gchar *item_path = NULL;
3104
3105         g_return_val_if_fail(folder != NULL, NULL);
3106         g_return_val_if_fail(folder->account != NULL, NULL);
3107         g_return_val_if_fail(item != NULL, NULL);
3108         folder_path = prefs_account_cache_dir(folder->account, FALSE);
3109
3110         g_return_val_if_fail(folder_path != NULL, NULL);
3111
3112 #ifdef G_OS_UNIX
3113         item_path = g_strdup(item->path);
3114 #else
3115         item_path = imap_encode_unsafe_chars(item->path);
3116 #endif
3117
3118         if (g_path_is_absolute(folder_path)) {
3119                 if (item_path)
3120                         path = g_strconcat(folder_path, G_DIR_SEPARATOR_S,
3121                                            item_path, NULL);
3122                 else
3123                         path = g_strdup(folder_path);
3124         } else {
3125                 if (item_path)
3126                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
3127                                            folder_path, G_DIR_SEPARATOR_S,
3128                                            item_path, NULL);
3129                 else
3130                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
3131                                            folder_path, NULL);
3132         }
3133         g_free(folder_path);
3134         g_free(item_path);
3135 #ifdef G_OS_WIN32
3136         while (strchr(path, '/'))
3137                 *strchr(path, '/') = '\\';
3138 #endif
3139
3140         return path;
3141 }
3142
3143 static FolderItem *imap_create_folder(Folder *folder, FolderItem *parent,
3144                                const gchar *name)
3145 {
3146         gchar *dirpath, *imap_path;
3147         IMAPSession *session;
3148         FolderItem *new_item;
3149         gchar separator;
3150         gchar *new_name;
3151         const gchar *p;
3152         gint ok = MAILIMAP_NO_ERROR;
3153         gboolean no_select = FALSE, no_sub = FALSE;
3154         gboolean exist = FALSE;
3155
3156         g_return_val_if_fail(folder != NULL, NULL);
3157         g_return_val_if_fail(folder->account != NULL, NULL);
3158         g_return_val_if_fail(parent != NULL, NULL);
3159         g_return_val_if_fail(name != NULL, NULL);
3160
3161         if (to_number(name) > 0) {
3162                 gchar *cached_msg = imap_get_cached_filename(parent, to_number(name));
3163                 if (is_file_exist(cached_msg)) {
3164                         if (claws_unlink(cached_msg) != 0) {
3165                                 return NULL;
3166                         }
3167                 }
3168         }
3169
3170         debug_print("getting session...\n");
3171         session = imap_session_get(folder);
3172         if (!session) {
3173                 return NULL;
3174         }
3175
3176         if (!folder_item_parent(parent) && strcasecmp(name, "INBOX") == 0) {
3177                 dirpath = g_strdup(name);
3178         }else if (parent->path)
3179                 dirpath = g_strconcat(parent->path, "/", name, NULL);
3180         else if ((p = strchr(name, '/')) != NULL && *(p + 1) != '\0')
3181                 dirpath = g_strdup(name);
3182         else if (folder->account->imap_dir && *folder->account->imap_dir) {
3183                 gchar *imap_dir;
3184
3185                 Xstrdup_a(imap_dir, folder->account->imap_dir, {return NULL;});
3186                 strtailchomp(imap_dir, '/');
3187                 dirpath = g_strconcat(imap_dir, "/", name, NULL);
3188         } else
3189                 dirpath = g_strdup(name);
3190
3191
3192
3193         /* keep trailing directory separator to create a folder that contains
3194            sub folder */
3195         imap_path = imap_utf8_to_modified_utf7(dirpath, FALSE);
3196
3197         strtailchomp(dirpath, '/');
3198         Xstrdup_a(new_name, name, {
3199                 g_free(dirpath);
3200                 g_free(imap_path);
3201                 return NULL;});
3202
3203         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), imap_path, &ok);
3204         if (is_fatal(ok)) {
3205                 g_free(imap_path);
3206                 return NULL;
3207         }
3208         imap_path_separator_subst(imap_path, separator);
3209         /* remove trailing / for display */
3210         strtailchomp(new_name, '/');
3211
3212         if (strcasecmp(dirpath, "INBOX") != 0) {
3213                 int r;
3214                 clist * lep_list;
3215
3216                 r = imap_threaded_list(folder, "", imap_path, &lep_list);
3217                 if (r != MAILIMAP_NO_ERROR) {
3218                         imap_handle_error(SESSION(session), NULL, r);
3219                         log_warning(LOG_PROTOCOL, _("can't create mailbox: LIST failed\n"));
3220                         g_free(imap_path);
3221                         g_free(dirpath);
3222                         return NULL;
3223                 }
3224
3225                 if (clist_count(lep_list) > 0)
3226                         exist = TRUE;
3227                 mailimap_list_result_free(lep_list);
3228                 lep_list = NULL;
3229                 if (!exist) {
3230                         ok = imap_cmd_create(session, imap_path);
3231                         if (ok != MAILIMAP_NO_ERROR) {
3232                                 log_warning(LOG_PROTOCOL, _("can't create mailbox\n"));
3233                                 g_free(imap_path);
3234                                 g_free(dirpath);
3235                                 return NULL;
3236                         }
3237                         r = imap_threaded_list(folder, "", imap_path, &lep_list);
3238                         if (r == MAILIMAP_NO_ERROR) {
3239                                 GSList *item_list = imap_list_from_lep(IMAP_FOLDER(folder),
3240                                                lep_list, dirpath, TRUE);
3241                                 if (item_list) {
3242                                         FolderItem *cur_item = FOLDER_ITEM(item_list->data);
3243                                         no_select = cur_item->no_select;
3244                                         no_sub = cur_item->no_sub;
3245                                         g_slist_free(item_list);
3246                                 }
3247                                 mailimap_list_result_free(lep_list);
3248                         } else {
3249                                 imap_handle_error(SESSION(session), NULL, r);
3250                         }
3251                 }
3252                 imap_threaded_subscribe(folder, imap_path, TRUE);
3253         } else {
3254                 clist *lep_list;
3255                 int r;
3256                 /* just get flags */
3257                 r = imap_threaded_list(folder, "", "INBOX", &lep_list);
3258                 if (r == MAILIMAP_NO_ERROR) {
3259                         GSList *item_list = imap_list_from_lep(IMAP_FOLDER(folder),
3260                                        lep_list, dirpath, TRUE);
3261                         if (item_list) {
3262                                 FolderItem *cur_item = FOLDER_ITEM(item_list->data);
3263                                 no_select = cur_item->no_select;
3264                                 no_sub = cur_item->no_sub;
3265                                 g_slist_free(item_list);
3266                         }
3267                         mailimap_list_result_free(lep_list);
3268                 } else {
3269                         imap_handle_error(SESSION(session), NULL, r);
3270                 }
3271         }
3272
3273         new_item = folder_item_new(folder, new_name, dirpath);
3274         new_item->no_select = no_select;
3275         new_item->no_sub = no_sub;
3276         folder_item_append(parent, new_item);
3277         g_free(imap_path);
3278         g_free(dirpath);
3279
3280         dirpath = folder_item_get_path(new_item);
3281         if (!is_dir_exist(dirpath))
3282                 make_dir_hier(dirpath);
3283         g_free(dirpath);
3284
3285         if (exist) {
3286                 /* folder existed, scan it */
3287                 imap_scan_required(folder, new_item);
3288                 folder_item_scan_full(new_item, FALSE);
3289         }
3290
3291         return new_item;
3292 }
3293
3294 static gint imap_rename_folder(Folder *folder, FolderItem *item,
3295                                const gchar *name)
3296 {
3297         gchar *dirpath;
3298         gchar *newpath;
3299         gchar *real_oldpath;
3300         gchar *real_newpath;
3301         gchar *paths[2];
3302         gchar *old_cache_dir;
3303         gchar *new_cache_dir;
3304         IMAPSession *session;
3305         gchar separator;
3306         gint ok = MAILIMAP_NO_ERROR;
3307         gint exists, recent, unseen;
3308         guint32 uid_validity;
3309
3310         g_return_val_if_fail(folder != NULL, -1);
3311         g_return_val_if_fail(item != NULL, -1);
3312         g_return_val_if_fail(item->path != NULL, -1);
3313         g_return_val_if_fail(name != NULL, -1);
3314
3315         debug_print("getting session...\n");
3316         session = imap_session_get(folder);
3317         if (!session) {
3318                 return -1;
3319         }
3320
3321         if (strchr(name, imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &ok)) != NULL ||
3322                 is_fatal(ok)) {
3323                 g_warning("New folder name must not contain the namespace "
3324                             "path separator");
3325                 return -1;
3326         }
3327
3328         real_oldpath = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &ok);
3329         if (is_fatal(ok)) {
3330                 g_free(real_oldpath);
3331                 return -1;
3332         }
3333
3334         g_free(session->mbox);
3335         session->mbox = NULL;
3336         session->exists = 0;
3337         session->recent = 0;
3338         session->expunge = 0;
3339         ok = imap_cmd_examine(session, "INBOX",
3340                               &exists, &recent, &unseen, &uid_validity, FALSE);
3341         if (ok != MAILIMAP_NO_ERROR) {
3342                 g_free(real_oldpath);
3343                 return -1;
3344         }
3345
3346         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &ok);
3347         if (is_fatal(ok)) {
3348                 g_free(real_oldpath);
3349                 return -1;
3350         }
3351         if (strchr(item->path, '/')) {
3352                 dirpath = g_path_get_dirname(item->path);
3353                 newpath = g_strconcat(dirpath, "/", name, NULL);
3354                 g_free(dirpath);
3355         } else
3356                 newpath = g_strdup(name);
3357
3358         real_newpath = imap_utf8_to_modified_utf7(newpath, FALSE);
3359         imap_path_separator_subst(real_newpath, separator);
3360
3361         ok = imap_cmd_rename(session, real_oldpath, real_newpath);
3362         if (ok != MAILIMAP_NO_ERROR) {
3363                 log_warning(LOG_PROTOCOL, _("can't rename mailbox: %s to %s\n"),
3364                             real_oldpath, real_newpath);
3365                 g_free(real_oldpath);
3366                 g_free(newpath);
3367                 g_free(real_newpath);
3368                 return -1;
3369         }
3370         g_free(item->name);
3371         item->name = g_strdup(name);
3372
3373         old_cache_dir = folder_item_get_path(item);
3374
3375         paths[0] = g_strdup(item->path);
3376         paths[1] = newpath;
3377         g_node_traverse(item->node, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
3378                         imap_rename_folder_func, paths);
3379
3380         if (is_dir_exist(old_cache_dir)) {
3381                 new_cache_dir = folder_item_get_path(item);
3382                 if (g_rename(old_cache_dir, new_cache_dir) < 0) {
3383                         FILE_OP_ERROR(old_cache_dir, "rename");
3384                 }
3385                 g_free(new_cache_dir);
3386         }
3387
3388         g_free(old_cache_dir);
3389         g_free(paths[0]);
3390         g_free(newpath);
3391         g_free(real_oldpath);
3392         g_free(real_newpath);
3393         return 0;
3394 }
3395
3396 gint imap_subscribe(Folder *folder, FolderItem *item, gchar *rpath, gboolean sub)
3397 {
3398         gchar *path;
3399         gint r = MAILIMAP_NO_ERROR;
3400         IMAPSession *session;
3401         debug_print("getting session...\n");
3402
3403         session = imap_session_get(folder);
3404         if (!session) {
3405                 return -1;
3406         }
3407         if (item && item->path) {
3408                 path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &r);
3409                 if (!path)
3410                         return -1;
3411                 if (is_fatal(r)) {
3412                         g_free(path);
3413                         return -1;
3414                 }
3415                 if (!strcasecmp(path, "INBOX") && sub == FALSE) {
3416                         g_free(path);
3417                         return -1;
3418                 }
3419                 debug_print("%ssubscribing %s\n", sub?"":"un", path);
3420                 r = imap_threaded_subscribe(folder, path, sub);
3421                 g_free(path);
3422         } else if (rpath) {
3423                 r = imap_threaded_subscribe(folder, rpath, sub);
3424         } else
3425                 return -1;
3426         return r;
3427 }
3428
3429 static gint imap_remove_folder_real(Folder *folder, FolderItem *item)
3430 {
3431         gint ok = MAILIMAP_NO_ERROR;
3432         IMAPSession *session;
3433         gchar *path;
3434         gchar *cache_dir;
3435         gboolean selected_folder;
3436
3437         g_return_val_if_fail(folder != NULL, -1);
3438         g_return_val_if_fail(item != NULL, -1);
3439         g_return_val_if_fail(item->path != NULL, -1);
3440
3441         debug_print("getting session...\n");
3442         session = imap_session_get(folder);
3443         if (!session) {
3444                 return -1;
3445         }
3446         path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &ok);
3447         if (is_fatal(ok)) {
3448                 g_free(path);
3449                 return -1;
3450         }
3451         imap_threaded_subscribe(folder, path, FALSE);
3452
3453         selected_folder = (session->mbox != NULL) &&
3454                           (!strcmp(session->mbox, item->path));
3455         if (selected_folder) {
3456                 ok = imap_cmd_close(session);
3457                 if (ok != MAILIMAP_NO_ERROR) {
3458                         debug_print("close err %d\n", ok);
3459                         return ok;
3460                 }
3461         }
3462         ok = imap_cmd_delete(session, path);
3463         if (ok != MAILIMAP_NO_ERROR && !is_fatal(ok)) {
3464                 gchar *tmp = NULL;
3465
3466                 ok = MAILIMAP_NO_ERROR;
3467                 tmp = g_strdup_printf("%s%c", path,
3468                                 imap_get_path_separator(session, IMAP_FOLDER(folder), path, &ok));
3469                 g_free(path);
3470                 path = tmp;
3471                 if (!is_fatal(ok))
3472                         ok = imap_cmd_delete(session, path);
3473         }
3474
3475         if (ok != MAILIMAP_NO_ERROR) {
3476                 log_warning(LOG_PROTOCOL, _("can't delete mailbox\n"));
3477                 g_free(path);
3478                 return -1;
3479         }
3480
3481         g_free(path);
3482         cache_dir = folder_item_get_path(item);
3483         if (is_dir_exist(cache_dir) && remove_dir_recursive(cache_dir) < 0)
3484                 g_warning("can't remove directory '%s'", cache_dir);
3485         g_free(cache_dir);
3486         folder_item_remove(item);
3487         return 0;
3488 }
3489
3490 static gint imap_remove_folder(Folder *folder, FolderItem *item)
3491 {
3492         GNode *node, *next;
3493
3494         g_return_val_if_fail(item != NULL, -1);
3495         g_return_val_if_fail(item->folder != NULL, -1);
3496         g_return_val_if_fail(item->node != NULL, -1);
3497
3498         node = item->node->children;
3499         while (node != NULL) {
3500                 next = node->next;
3501                 if (imap_remove_folder(folder, FOLDER_ITEM(node->data)) < 0)
3502                         return -1;
3503                 node = next;
3504         }
3505         debug_print("IMAP removing %s\n", item->path);
3506
3507         if (imap_remove_all_msg(folder, item) < 0)
3508                 return -1;
3509         return imap_remove_folder_real(folder, item);
3510 }
3511
3512 typedef struct _uncached_data {
3513         IMAPSession *session;
3514         FolderItem *item;
3515         MsgNumberList *numlist;
3516         guint cur;
3517         guint total;
3518         gboolean done;
3519         int ok;
3520 } uncached_data;
3521
3522 static void *imap_get_uncached_messages_thread(void *data)
3523 {
3524         uncached_data *stuff = (uncached_data *)data;
3525         IMAPSession *session = stuff->session;
3526         FolderItem *item = stuff->item;
3527         MsgNumberList *numlist = stuff->numlist;
3528         GSList *newlist = NULL;
3529         GSList *llast = NULL;
3530         GSList *seq_list, *cur;
3531         gboolean got_alien_tags = FALSE;
3532
3533         debug_print("uncached_messages\n");
3534
3535         if (session == NULL || item == NULL || item->folder == NULL
3536             || FOLDER_CLASS(item->folder) != &imap_class) {
3537                 stuff->done = TRUE;
3538                 return NULL;
3539         }
3540
3541         seq_list = imap_get_lep_set_from_numlist(IMAP_FOLDER(item->folder), numlist);
3542         debug_print("get msgs info\n");
3543         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
3544                 struct mailimap_set * imapset;
3545                 unsigned int i;
3546                 int r;
3547                 carray * env_list;
3548                 int count;
3549
3550                 if (session->cancelled)
3551                         break;
3552
3553                 imapset = cur->data;
3554
3555                 r = imap_threaded_fetch_env(session->folder,
3556                                             imapset, &env_list);
3557                 if (r != MAILIMAP_NO_ERROR) {
3558                         imap_handle_error(SESSION(session), NULL, r);
3559                         if (is_fatal(r)) {
3560                                 stuff->ok = r;
3561                                 return NULL;
3562                         }
3563                         continue;
3564                 }
3565
3566                 session_set_access_time(SESSION(session));
3567
3568                 count = 0;
3569                 for(i = 0 ; i < carray_count(env_list) ; i += 2) {
3570                         struct imap_fetch_env_info * info;
3571                         MsgInfo * msginfo;
3572                         GSList *tags = NULL, *cur = NULL;
3573                         info = carray_get(env_list, i);
3574                         tags = carray_get(env_list, i+1);
3575                         msginfo = imap_envelope_from_lep(info, item);
3576                         if (msginfo == NULL) {
3577                                 slist_free_strings_full(tags);
3578                                 continue;
3579                         }
3580                         g_slist_free(msginfo->tags);
3581                         msginfo->tags = NULL;
3582
3583                         for (cur = tags; cur; cur = cur->next) {
3584                                 gchar *real_tag = imap_modified_utf7_to_utf8(cur->data, TRUE);
3585                                 gint id = 0;
3586                                 id = tags_get_id_for_str(real_tag);
3587                                 if (id == -1) {
3588                                         id = tags_add_tag(real_tag);
3589                                         got_alien_tags = TRUE;
3590                                 }
3591                                 if (!g_slist_find(msginfo->tags, GINT_TO_POINTER(id))) {
3592                                         msginfo->tags = g_slist_prepend(
3593                                                         msginfo->tags,
3594                                                         GINT_TO_POINTER(id));
3595                                 }
3596                                 g_free(real_tag);
3597                         }
3598                         if (msginfo->tags)
3599                                 msginfo->tags = g_slist_reverse(msginfo->tags);
3600                         slist_free_strings_full(tags);
3601                         msginfo->folder = item;
3602                         if (!newlist)
3603                                 llast = newlist = g_slist_append(newlist, msginfo);
3604                         else {
3605                                 llast = g_slist_append(llast, msginfo);
3606                                 llast = llast->next;
3607                         }
3608                         count ++;
3609                 }
3610
3611                 imap_fetch_env_free(env_list);
3612         }
3613
3614         if (got_alien_tags) {
3615                 tags_write_tags();
3616                 main_window_reflect_tags_changes(mainwindow_get_mainwindow());
3617         }
3618
3619         imap_lep_set_free(seq_list);
3620
3621         session_set_access_time(SESSION(session));
3622         stuff->done = TRUE;
3623         return newlist;
3624 }
3625
3626 #define MAX_MSG_NUM 50
3627
3628 static GSList *imap_get_uncached_messages(IMAPSession *session,
3629                                         FolderItem *item,
3630                                         MsgNumberList *numlist,
3631                                         int *r)
3632 {
3633         GSList *result = NULL;
3634         GSList * cur;
3635         uncached_data *data = g_new0(uncached_data, 1);
3636
3637         cur = numlist;
3638         data->total = g_slist_length(numlist);
3639         data->ok = MAILIMAP_NO_ERROR;
3640         debug_print("messages list : %i\n", data->total);
3641
3642         while (cur != NULL) {
3643                 GSList * partial_result;
3644                 int count;
3645                 GSList * newlist;
3646                 GSList * llast;
3647
3648                 llast = NULL;
3649                 count = 0;
3650                 newlist = NULL;
3651                 while (count < MAX_MSG_NUM) {
3652                         void * p;
3653
3654                         p = cur->data;
3655
3656                         if (newlist == NULL)
3657                                 llast = newlist = g_slist_append(newlist, p);
3658                         else {
3659                                 llast = g_slist_append(llast, p);
3660                                 llast = llast->next;
3661                         }
3662                         count ++;
3663
3664                         cur = cur->next;
3665                         if (cur == NULL)
3666                                 break;
3667                 }
3668
3669                 data->done = FALSE;
3670                 data->session = session;
3671                 data->item = item;
3672                 data->numlist = newlist;
3673                 data->cur += count;
3674
3675                 if (prefs_common.work_offline &&
3676                     !inc_offline_should_override(FALSE,
3677                         _("Claws Mail needs network access in order "
3678                           "to access the IMAP server."))) {
3679                         g_free(data);
3680                         return NULL;
3681                 }
3682
3683                 partial_result =
3684                         (GSList *)imap_get_uncached_messages_thread(data);
3685                 *r = data->ok;
3686                 if (data->ok != MAILIMAP_NO_ERROR) {
3687                         goto bail;
3688                 }
3689                 statusbar_progress_all(data->cur,data->total, 1);
3690
3691                 g_slist_free(newlist);
3692
3693                 result = g_slist_concat(result, partial_result);
3694         }
3695 bail:
3696         g_free(data);
3697
3698         statusbar_progress_all(0,0,0);
3699         statusbar_pop_all();
3700
3701         return result;
3702 }
3703
3704 static void imap_delete_all_cached_messages(FolderItem *item)
3705 {
3706         gchar *dir;
3707
3708         g_return_if_fail(item != NULL);
3709         g_return_if_fail(item->folder != NULL);
3710         g_return_if_fail(FOLDER_CLASS(item->folder) == &imap_class);
3711
3712         debug_print("Deleting all cached messages...\n");
3713
3714         dir = folder_item_get_path(item);
3715         if (is_dir_exist(dir))
3716                 remove_all_numbered_files(dir);
3717         g_free(dir);
3718
3719         debug_print("Deleting all cached messages done.\n");
3720 }
3721
3722 gchar imap_get_path_separator_for_item(FolderItem *item)
3723 {
3724         Folder *folder = NULL;
3725         IMAPFolder *imap_folder = NULL;
3726         IMAPSession *session = NULL;
3727         gchar result = '/';
3728         gint ok = MAILIMAP_NO_ERROR;
3729         if (!item)
3730                 return '/';
3731         folder = item->folder;
3732
3733         if (!folder)
3734                 return '/';
3735
3736         imap_folder = IMAP_FOLDER(folder);
3737
3738         debug_print("getting session...\n");
3739         session = imap_session_get(FOLDER(folder));
3740         result = imap_get_path_separator(session, imap_folder, item->path, &ok);
3741         return result;
3742 }
3743
3744 static gchar imap_refresh_path_separator(IMAPSession *session, IMAPFolder *folder, const gchar *subfolder, gint *ok)
3745 {
3746         clist * lep_list;
3747         int r;
3748         gchar separator = '\0';
3749
3750         g_return_val_if_fail(session != NULL, '/');
3751         r = imap_threaded_list((Folder *)folder, "", subfolder, &lep_list);
3752
3753         if (r != MAILIMAP_NO_ERROR) {
3754                 imap_handle_error(SESSION(session), NULL, r);
3755                 log_warning(LOG_PROTOCOL, _("LIST failed\n"));
3756                 *ok = r;
3757                 return '\0';
3758         }
3759
3760         if (lep_list != NULL && clist_count(lep_list) > 0) {
3761                 clistiter * iter = clist_begin(lep_list);
3762                 struct mailimap_mailbox_list * mb;
3763                 mb = clist_content(iter);
3764
3765                 separator = mb->mb_delimiter;
3766                 debug_print("got separator: %c\n", folder->last_seen_separator);
3767         }
3768         *ok = MAILIMAP_NO_ERROR;
3769         mailimap_list_result_free(lep_list);
3770         return separator;
3771 }
3772
3773 static gchar imap_get_path_separator(IMAPSession *session, IMAPFolder *folder, const gchar *path, gint *ok)
3774 {
3775         gchar separator = '/';
3776         *ok = MAILIMAP_NO_ERROR;
3777         if (folder->last_seen_separator == 0) {
3778                 folder->last_seen_separator = imap_refresh_path_separator(session, folder, "", ok);
3779         }
3780
3781         if (folder->last_seen_separator == 0) {
3782                 folder->last_seen_separator = imap_refresh_path_separator(session, folder, "INBOX", ok);
3783         }
3784
3785         if (folder->last_seen_separator != 0) {
3786                 debug_print("using separator: %c\n", folder->last_seen_separator);
3787                 return folder->last_seen_separator;
3788         }
3789
3790         return separator;
3791 }
3792
3793 static gchar *imap_get_real_path(IMAPSession *session, IMAPFolder *folder, const gchar *path, gint *ok)
3794 {
3795         gchar *real_path = NULL;
3796         gchar separator;
3797
3798         g_return_val_if_fail(folder != NULL, NULL);
3799         g_return_val_if_fail(path != NULL, NULL);
3800
3801         *ok = MAILIMAP_NO_ERROR;
3802
3803         real_path = imap_utf8_to_modified_utf7(path, FALSE);
3804         separator = imap_get_path_separator(session, folder, path, ok);
3805         if (*ok == MAILIMAP_NO_ERROR)
3806                 imap_path_separator_subst(real_path, separator);
3807
3808         return real_path;
3809 }
3810
3811 static gint imap_set_message_flags(IMAPSession *session,
3812                                    IMAPFolderItem *item,
3813                                    MsgNumberList *numlist,
3814                                    IMAPFlags flags,
3815                                    GSList *tags,
3816                                    gboolean is_set)
3817 {
3818         gint ok = 0;
3819         GSList *seq_list;
3820         GSList * cur;
3821         gint total = 0;
3822         IMAPFolder *folder = NULL;
3823         GSList *sorted_list = NULL;
3824
3825         if (numlist == NULL || session == NULL)
3826                 return MAILIMAP_ERROR_BAD_STATE;
3827
3828         folder = IMAP_FOLDER(session->folder);
3829
3830         sorted_list = g_slist_copy(numlist);
3831         sorted_list = g_slist_sort(sorted_list, g_int_compare);
3832
3833         cur = g_slist_last(sorted_list);
3834
3835         if (cur)
3836                 total = GPOINTER_TO_INT(cur->data);
3837
3838         seq_list = imap_get_lep_set_from_numlist(IMAP_FOLDER(session->folder), sorted_list);
3839
3840         statusbar_print_all(_("Flagging messages..."));
3841
3842         for(cur = seq_list ; cur != NULL ; cur = g_slist_next(cur)) {
3843                 struct mailimap_set * imapset = (struct mailimap_set *)cur->data;
3844                 struct mailimap_set_item *set_item = NULL;
3845
3846                 if (imapset->set_list)
3847                         set_item = clist_content(clist_begin(imapset->set_list));
3848                 else
3849                         continue;
3850
3851                 if (set_item == NULL)
3852                         continue;
3853
3854                 statusbar_progress_all(set_item->set_first, total, 1);
3855
3856                 ok = imap_cmd_store(session, item, imapset,
3857                                     flags, tags, is_set);
3858                 statusbar_progress_all(set_item->set_last, total, 1);
3859                 if (ok != MAILIMAP_NO_ERROR && folder->max_set_size > 20) {
3860                         /* reduce max set size */
3861                         folder->max_set_size /= 2;
3862                 }
3863                 if (ok != MAILIMAP_NO_ERROR && is_fatal(ok)) {
3864                         break;
3865                 }
3866         }
3867
3868         g_slist_free(sorted_list);
3869
3870         statusbar_progress_all(0,0,0);
3871         statusbar_pop_all();
3872
3873         imap_lep_set_free(seq_list);
3874
3875         return ok;
3876 }
3877
3878 typedef struct _select_data {
3879         IMAPSession *session;
3880         gchar *real_path;
3881         gint *exists;
3882         gint *recent;
3883         gint *unseen;
3884         guint32 *uid_validity;
3885         gboolean done;
3886 } select_data;
3887
3888 static gint imap_select(IMAPSession *session, IMAPFolder *folder,
3889                         FolderItem *item,
3890                         gint *exists, gint *recent, gint *unseen,
3891                         guint32 *uid_validity, gint *can_create_flags,
3892                         gboolean block)
3893 {
3894         gchar *real_path;
3895         gint ok = MAILIMAP_NO_ERROR;
3896         gint exists_, recent_, unseen_;
3897         guint32 uid_validity_;
3898         gint can_create_flags_;
3899         const gchar *path = item ? item->path:NULL;
3900
3901         if (!item) {
3902                 return MAILIMAP_ERROR_BAD_STATE;
3903         }
3904
3905         if (!exists && !recent && !unseen && !uid_validity && !can_create_flags) {
3906                 if (session->mbox && strcmp(session->mbox, path) == 0)
3907                         return MAILIMAP_NO_ERROR;
3908         }
3909         if (!exists && !recent && !unseen && !uid_validity && can_create_flags) {
3910                 if (session->mbox && strcmp(session->mbox, path) == 0) {
3911                         if (IMAP_FOLDER_ITEM(item)->can_create_flags != ITEM_CAN_CREATE_FLAGS_UNKNOWN)
3912                                 return MAILIMAP_NO_ERROR;
3913                 }
3914         }
3915         if (!exists)
3916                 exists = &exists_;
3917         if (!recent)
3918                 recent = &recent_;
3919         if (!unseen)
3920                 unseen = &unseen_;
3921         if (!uid_validity)
3922                 uid_validity = &uid_validity_;
3923         if (!can_create_flags)
3924                 can_create_flags = &can_create_flags_;
3925
3926         g_free(session->mbox);
3927         session->mbox = NULL;
3928         session->exists = 0;
3929         session->recent = 0;
3930         session->expunge = 0;
3931
3932         real_path = imap_get_real_path(session, folder, path, &ok);
3933         if (is_fatal(ok)) {
3934                 g_free(real_path);
3935                 return ok;
3936         }
3937         g_slist_free(IMAP_FOLDER_ITEM(item)->ok_flags);
3938         IMAP_FOLDER_ITEM(item)->ok_flags = NULL;
3939         ok = imap_cmd_select(session, real_path,
3940                              exists, recent, unseen, uid_validity, can_create_flags,
3941                              &(IMAP_FOLDER_ITEM(item)->ok_flags), block);
3942         if (ok != MAILIMAP_NO_ERROR) {
3943                 log_warning(LOG_PROTOCOL, _("can't select folder: %s\n"), real_path);
3944         } else {
3945                 session->mbox = g_strdup(path);
3946                 session->folder_content_changed = FALSE;
3947                 session->exists = *exists;
3948                 session->recent = *recent;
3949                 session->expunge = 0;
3950                 session->unseen = *unseen;
3951                 session->uid_validity = *uid_validity;
3952                 debug_print("select: exists %d recent %d expunge %d uid_validity %d can_create_flags %d\n",
3953                         session->exists, session->recent, session->expunge,
3954                         session->uid_validity, *can_create_flags);
3955         }
3956         if (*can_create_flags) {
3957                 IMAP_FOLDER_ITEM(item)->can_create_flags = ITEM_CAN_CREATE_FLAGS;
3958         } else {
3959                 IMAP_FOLDER_ITEM(item)->can_create_flags = ITEM_CANNOT_CREATE_FLAGS;
3960         }
3961         g_free(real_path);
3962
3963         return ok;
3964 }
3965
3966 static gint imap_status(IMAPSession *session, IMAPFolder *folder,
3967                         const gchar *path, IMAPFolderItem *item,
3968                         gint *messages,
3969                         guint32 *uid_next, guint32 *uid_validity,
3970                         gint *unseen, gboolean block)
3971 {
3972         int r = MAILIMAP_NO_ERROR;
3973         clistiter * iter;
3974         struct mailimap_mailbox_data_status * data_status;
3975         int got_values;
3976         gchar *real_path;
3977         guint mask = 0;
3978
3979         real_path = imap_get_real_path(session, folder, path, &r);
3980         if (is_fatal(r)) {
3981                 g_free(real_path);
3982                 return r;
3983         }
3984         if (messages) {
3985                 mask |= 1 << 0;
3986                 *messages = 0;
3987         }
3988         if (uid_next) {
3989                 mask |= 1 << 2;
3990                 *uid_next = 0;
3991         }
3992         if (uid_validity) {
3993                 mask |= 1 << 3;
3994                 *uid_validity = 0;
3995         }
3996         if (unseen) {
3997                 mask |= 1 << 4;
3998                 *unseen = 0;
3999         }
4000
4001         if (session->mbox != NULL &&
4002             !strcmp(session->mbox, item->item.path)) {
4003                 r = imap_cmd_close(session);
4004                 if (r != MAILIMAP_NO_ERROR) {
4005                         debug_print("close err %d\n", r);
4006                         g_free(real_path);
4007                         return r;
4008                 }
4009         }
4010
4011         r = imap_threaded_status(FOLDER(folder), real_path,
4012                 &data_status, mask);
4013
4014         g_free(real_path);
4015         if (r != MAILIMAP_NO_ERROR) {
4016                 imap_handle_error(SESSION(session), NULL, r);
4017                 debug_print("status err %d\n", r);
4018                 return r;
4019         }
4020
4021         if (data_status == NULL || data_status->st_info_list == NULL) {
4022                 debug_print("data_status %p\n", data_status);
4023                 if (data_status) {
4024                         debug_print("data_status->st_info_list %p\n", data_status->st_info_list);
4025                         mailimap_mailbox_data_status_free(data_status);
4026                 }
4027                 return MAILIMAP_ERROR_BAD_STATE;
4028         }
4029
4030         got_values = 0;
4031         if (data_status->st_info_list) {
4032                 for(iter = clist_begin(data_status->st_info_list) ; iter != NULL ;
4033                     iter = clist_next(iter)) {
4034                         struct mailimap_status_info * info;
4035
4036                         info = clist_content(iter);
4037                         switch (info->st_att) {
4038                         case MAILIMAP_STATUS_ATT_MESSAGES:
4039                                 if (messages) {
4040                                         * messages = info->st_value;
4041                                         got_values |= 1 << 0;
4042                                 }
4043                                 break;
4044
4045                         case MAILIMAP_STATUS_ATT_UIDNEXT:
4046                                 if (uid_next) {
4047                                         * uid_next = info->st_value;
4048                                         got_values |= 1 << 2;
4049                                 }
4050                                 break;
4051
4052                         case MAILIMAP_STATUS_ATT_UIDVALIDITY:
4053                                 if (uid_validity) {
4054                                         * uid_validity = info->st_value;
4055                                         got_values |= 1 << 3;
4056                                 }
4057                                 break;
4058
4059                         case MAILIMAP_STATUS_ATT_UNSEEN:
4060                                 if (unseen) {
4061                                         * unseen = info->st_value;
4062                                         got_values |= 1 << 4;
4063                                 }
4064                                 break;
4065                         }
4066                 }
4067         }
4068         mailimap_mailbox_data_status_free(data_status);
4069
4070         if (got_values != mask) {
4071                 g_warning("status: incomplete values received (%d)", got_values);
4072         }
4073         return MAILIMAP_NO_ERROR;
4074 }
4075
4076 static void imap_free_capabilities(IMAPSession *session)
4077 {
4078         slist_free_strings_full(session->capability);
4079         session->capability = NULL;
4080 }
4081
4082 /* low-level IMAP4rev1 commands */
4083
4084 static gint imap_cmd_login(IMAPSession *session,
4085                            const gchar *user, const gchar *pass,
4086                            const gchar *type)
4087 {
4088         int r;
4089         gint ok;
4090
4091         if (!strcmp(type, "plaintext") && imap_has_capability(session, "LOGINDISABLED")) {
4092                 gint ok = MAILIMAP_ERROR_BAD_STATE;
4093                 if (imap_has_capability(session, "STARTTLS")) {
4094 #ifdef USE_GNUTLS
4095                         log_warning(LOG_PROTOCOL, _("Server requires STARTTLS to log in.\n"));
4096                         ok = imap_cmd_starttls(session);
4097                         if (ok != MAILIMAP_NO_ERROR) {
4098                                 log_warning(LOG_PROTOCOL, _("Can't start STARTTLS session.\n"));
4099                                 return ok;
4100                         } else {
4101                                 /* refresh capas */
4102                                 imap_free_capabilities(session);
4103                                 if ((r = imap_get_capabilities(session)) != MAILIMAP_NO_ERROR) {
4104                                         imap_handle_error(SESSION(session), NULL, r);
4105                                         log_warning(LOG_PROTOCOL, _("Can't refresh capabilities.\n"));
4106                                         return r;
4107                                 }
4108                         }
4109 #else
4110                         log_error(LOG_PROTOCOL, _("Connection to %s failed: "
4111                                         "server requires STARTTLS, but Claws Mail "
4112                                         "has been compiled without STARTTLS "
4113                                         "support.\n"),
4114                                         SESSION(session)->server);
4115                         return MAILIMAP_ERROR_LOGIN;
4116 #endif
4117                 } else {
4118                         log_error(LOG_PROTOCOL, _("Server logins are disabled.\n"));
4119                         return MAILIMAP_ERROR_LOGIN;
4120                 }
4121         }
4122
4123         log_print(LOG_PROTOCOL, "IMAP> Logging %s to %s using %s\n",
4124                         user,
4125                         SESSION(session)->server,
4126                         type);
4127         r = imap_threaded_login(session->folder, user, pass, type);
4128         if (r != MAILIMAP_NO_ERROR) {
4129                 imap_handle_error(SESSION(session), NULL, r);
4130                 log_print(LOG_PROTOCOL, "IMAP< Error logging in to %s\n",
4131                                 SESSION(session)->server);
4132                 ok = r;
4133         } else {
4134                 log_print(LOG_PROTOCOL, "IMAP< Login to %s successful\n",
4135                                 SESSION(session)->server);
4136                 ok = MAILIMAP_NO_ERROR;
4137         }
4138         return ok;
4139 }
4140
4141 static gint imap_cmd_noop(IMAPSession *session)
4142 {
4143         int r;
4144         unsigned int exists, recent, expunge, unseen, uidnext, uidval;
4145
4146         r = imap_threaded_noop(session->folder, &exists, &recent, &expunge, &unseen, &uidnext, &uidval);
4147         if (r != MAILIMAP_NO_ERROR) {
4148                 imap_handle_error(SESSION(session), NULL, r);
4149                 debug_print("noop err %d\n", r);
4150                 return r;
4151         }
4152
4153         if ((exists && exists != session->exists)
4154          || (recent && recent != session->recent)
4155          || (expunge && expunge != session->expunge)
4156          || (unseen && unseen != session->unseen)) {
4157                 session->folder_content_changed = TRUE;
4158         }
4159         if (uidnext != 0 && uidnext != session->uid_next) {
4160                 session->uid_next = uidnext;
4161                 session->folder_content_changed = TRUE;
4162         }
4163         if (uidval != 0 && uidval != session->uid_validity) {
4164                 session->uid_validity = uidval;
4165                 session->folder_content_changed = TRUE;
4166         }
4167
4168         session->exists = exists;
4169         session->recent = recent;
4170         session->expunge = expunge;
4171         session->unseen = unseen;
4172
4173         session_set_access_time(SESSION(session));
4174
4175         return MAILIMAP_NO_ERROR;
4176 }
4177
4178 #ifdef USE_GNUTLS
4179 static gint imap_cmd_starttls(IMAPSession *session)
4180 {
4181         int r;
4182
4183         r = imap_threaded_starttls(session->folder,
4184                 SESSION(session)->server, SESSION(session)->port);
4185         if (r != MAILIMAP_NO_ERROR) {
4186                 imap_handle_error(SESSION(session), NULL, r);
4187                 debug_print("STARTTLS err %d\n", r);
4188                 return r;
4189         }
4190         return MAILIMAP_NO_ERROR;
4191 }
4192 #endif
4193
4194 static gint imap_cmd_select(IMAPSession *session, const gchar *folder,
4195                             gint *exists, gint *recent, gint *unseen,
4196                             guint32 *uid_validity, gint *can_create_flags,
4197                             GSList **ok_flags, gboolean block)
4198 {
4199         int r;
4200
4201         r = imap_threaded_select(session->folder, folder,
4202                                  exists, recent, unseen, uid_validity, can_create_flags, ok_flags);
4203         if (r != MAILIMAP_NO_ERROR) {
4204                 imap_handle_error(SESSION(session), NULL, r);
4205                 debug_print("select err %d\n", r);
4206                 return r;
4207         }
4208         return MAILIMAP_NO_ERROR;
4209 }
4210
4211 static gint imap_cmd_close(IMAPSession *session)
4212 {
4213         int r;
4214
4215         r = imap_threaded_close(session->folder);
4216         if (r != MAILIMAP_NO_ERROR) {
4217                 imap_handle_error(SESSION(session), NULL, r);
4218                 debug_print("close err %d\n", r);
4219                 return r;
4220         }
4221         g_free(session->mbox);
4222         session->mbox = NULL;
4223         session->exists = 0;
4224         session->recent = 0;
4225         session->expunge = 0;
4226         return MAILIMAP_NO_ERROR;
4227 }
4228
4229 static gint imap_cmd_examine(IMAPSession *session, const gchar *folder,
4230                              gint *exists, gint *recent, gint *unseen,
4231                              guint32 *uid_validity, gboolean block)
4232 {
4233         int r;
4234
4235         r = imap_threaded_examine(session->folder, folder,
4236                                   exists, recent, unseen, uid_validity);
4237         if (r != MAILIMAP_NO_ERROR) {
4238                 imap_handle_error(SESSION(session), NULL, r);
4239                 debug_print("examine err %d\n", r);
4240
4241                 return r;
4242         }
4243         return MAILIMAP_NO_ERROR;
4244 }
4245
4246 static gint imap_cmd_create(IMAPSession *session, const gchar *folder)
4247 {
4248         int r;
4249
4250         r = imap_threaded_create(session->folder, folder);
4251         if (r != MAILIMAP_NO_ERROR) {
4252                 imap_handle_error(SESSION(session), NULL, r);
4253                 return r;
4254         }
4255
4256         return MAILIMAP_NO_ERROR;
4257 }
4258
4259 static gint imap_cmd_rename(IMAPSession *session, const gchar *old_folder,
4260                             const gchar *new_folder)
4261 {
4262         int r;
4263
4264         r = imap_threaded_rename(session->folder, old_folder,
4265                                  new_folder);
4266         if (r != MAILIMAP_NO_ERROR) {
4267                 imap_handle_error(SESSION(session), NULL, r);
4268                 return r;
4269         }
4270
4271         return MAILIMAP_NO_ERROR;
4272 }
4273
4274 static gint imap_cmd_delete(IMAPSession *session, const gchar *folder)
4275 {
4276         int r;
4277
4278
4279         r = imap_threaded_delete(session->folder, folder);
4280         if (r != MAILIMAP_NO_ERROR) {
4281                 imap_handle_error(SESSION(session), NULL, r);
4282                 return r;
4283         }
4284
4285         return MAILIMAP_NO_ERROR;
4286 }
4287
4288 typedef struct _fetch_data {
4289         IMAPSession *session;
4290         guint32 uid;
4291         const gchar *filename;
4292         gboolean headers;
4293         gboolean body;
4294         gboolean done;
4295 } fetch_data;
4296
4297 static void *imap_cmd_fetch_thread(void *data)
4298 {
4299         fetch_data *stuff = (fetch_data *)data;
4300         IMAPSession *session = stuff->session;
4301         guint32 uid = stuff->uid;
4302         const gchar *filename = stuff->filename;
4303         int r;
4304
4305         if (stuff->body) {
4306                 r = imap_threaded_fetch_content(session->folder,
4307                                                uid, 1, filename);
4308         }
4309         else {
4310                 r = imap_threaded_fetch_content(session->folder,
4311                                                 uid, 0, filename);
4312         }
4313         if (r != MAILIMAP_NO_ERROR) {
4314                 imap_handle_error(SESSION(session), NULL, r);
4315                 debug_print("fetch err %d\n", r);
4316                 return GINT_TO_POINTER(r);
4317         }
4318         return GINT_TO_POINTER(MAILIMAP_NO_ERROR);
4319 }
4320
4321 static gint imap_cmd_fetch(IMAPSession *session, guint32 uid,
4322                                 const gchar *filename, gboolean headers,
4323                                 gboolean body)
4324 {
4325         fetch_data *data = g_new0(fetch_data, 1);
4326         int result = 0;
4327         data->done = FALSE;
4328         data->session = session;
4329         data->uid = uid;
4330         data->filename = filename;
4331         data->headers = headers;
4332         data->body = body;
4333
4334         if (prefs_common.work_offline &&
4335             !inc_offline_should_override(FALSE,
4336                 _("Claws Mail needs network access in order "
4337                   "to access the IMAP server."))) {
4338                 g_free(data);
4339                 return -1;
4340         }
4341         statusbar_print_all(_("Fetching message..."));
4342         result = GPOINTER_TO_INT(imap_cmd_fetch_thread(data));
4343         statusbar_pop_all();
4344         g_free(data);
4345         return result;
4346 }
4347
4348
4349 static gint imap_cmd_append(IMAPSession *session,
4350                             IMAPFolderItem *item,
4351                             const gchar *destfolder,
4352                             const gchar *file, IMAPFlags flags,
4353                             guint32 *new_uid)
4354 {
4355         struct mailimap_flag_list * flag_list;
4356         int r;
4357
4358         cm_return_val_if_fail(file != NULL, MAILIMAP_ERROR_BAD_STATE);
4359
4360         flag_list = imap_flag_to_lep(item, flags, NULL);
4361         lock_session(session);
4362         r = imap_threaded_append(session->folder, destfolder,
4363                          file, flag_list, (int *)new_uid);
4364         mailimap_flag_list_free(flag_list);
4365
4366         if (r != MAILIMAP_NO_ERROR) {
4367                 imap_handle_error(SESSION(session), NULL, r);
4368                 debug_print("append err %d\n", r);
4369                 return r;
4370         }
4371
4372         unlock_session(session);
4373
4374         return MAILIMAP_NO_ERROR;
4375 }
4376
4377 static gint imap_cmd_copy(IMAPSession *session, struct mailimap_set * set,
4378                           const gchar *destfolder,
4379                           struct mailimap_set **source, struct mailimap_set **dest)
4380 {
4381         int r;
4382
4383         g_return_val_if_fail(session != NULL, MAILIMAP_ERROR_BAD_STATE);
4384         g_return_val_if_fail(set != NULL, MAILIMAP_ERROR_BAD_STATE);
4385         g_return_val_if_fail(destfolder != NULL, MAILIMAP_ERROR_BAD_STATE);
4386
4387         r = imap_threaded_copy(session->folder, set, destfolder, source, dest);
4388         if (r != MAILIMAP_NO_ERROR) {
4389                 imap_handle_error(SESSION(session), NULL, r);
4390                 return r;
4391         }
4392
4393         return MAILIMAP_NO_ERROR;
4394 }
4395
4396 static gint imap_cmd_store(IMAPSession *session,
4397                            IMAPFolderItem *item,
4398                            struct mailimap_set * set,
4399                            IMAPFlags flags, GSList *tags, int do_add)
4400 {
4401         int r;
4402         struct mailimap_flag_list * flag_list = NULL;
4403         struct mailimap_store_att_flags * store_att_flags;
4404
4405         flag_list = imap_flag_to_lep(item, flags, tags);
4406
4407         if (do_add)
4408                 store_att_flags =
4409                         mailimap_store_att_flags_new_add_flags_silent(flag_list);
4410         else
4411                 store_att_flags =
4412                         mailimap_store_att_flags_new_remove_flags_silent(flag_list);
4413
4414         r = imap_threaded_store(session->folder, set, store_att_flags);
4415         mailimap_store_att_flags_free(store_att_flags);
4416         if (r != MAILIMAP_NO_ERROR) {
4417                 imap_handle_error(SESSION(session), NULL, r);
4418                 return r;
4419         }
4420
4421         return MAILIMAP_NO_ERROR;
4422 }
4423
4424 static gint imap_cmd_expunge(IMAPSession *session)
4425 {
4426         int r;
4427
4428         if (prefs_common.work_offline &&
4429             !inc_offline_should_override(FALSE,
4430                 _("Claws Mail needs network access in order "
4431                   "to access the IMAP server."))) {
4432                 return -1;
4433         }
4434
4435         r = imap_threaded_expunge(session->folder);
4436         if (r != MAILIMAP_NO_ERROR) {
4437                 imap_handle_error(SESSION(session), NULL, r);
4438                 return r;
4439         }
4440
4441         return MAILIMAP_NO_ERROR;
4442 }
4443
4444 gint imap_expunge(Folder *folder, FolderItem *item)
4445 {
4446         IMAPSession *session = imap_session_get(folder);
4447         if (session == NULL)
4448                 return -1;
4449
4450         return imap_cmd_expunge(session);
4451 }
4452
4453 static void imap_path_separator_subst(gchar *str, gchar separator)
4454 {
4455         gchar *p;
4456         gboolean in_escape = FALSE;
4457
4458         if (!separator || separator == '/') return;
4459
4460         for (p = str; *p != '\0'; p++) {
4461                 if (*p == '/' && !in_escape)
4462                         *p = separator;
4463                 else if (*p == '&' && *(p + 1) != '-' && !in_escape)
4464                         in_escape = TRUE;
4465                 else if (*p == '-' && in_escape)
4466                         in_escape = FALSE;
4467         }
4468 }
4469
4470 static gboolean imap_rename_folder_func(GNode *node, gpointer data)
4471 {
4472         FolderItem *item = node->data;
4473         gchar **paths = data;
4474         const gchar *oldpath = paths[0];
4475         const gchar *newpath = paths[1];
4476         gchar *real_oldpath, *real_newpath;
4477         gchar *base;
4478         gchar *new_itempath;
4479         gint oldpathlen;
4480         IMAPSession *session = imap_session_get(item->folder);
4481         gint ok = MAILIMAP_NO_ERROR;
4482         oldpathlen = strlen(oldpath);
4483         if (strncmp(oldpath, item->path, oldpathlen) != 0) {
4484                 g_warning("path doesn't match: %s, %s", oldpath, item->path);
4485                 return TRUE;
4486         }
4487
4488         base = item->path + oldpathlen;
4489         while (*base == '/') base++;
4490         if (*base == '\0')
4491                 new_itempath = g_strdup(newpath);
4492         else
4493                 new_itempath = g_strconcat(newpath, "/", base,
4494                                            NULL);
4495
4496         real_oldpath = imap_get_real_path(session, IMAP_FOLDER(item->folder), item->path, &ok);
4497         g_free(item->path);
4498         item->path = new_itempath;
4499
4500         real_newpath = imap_get_real_path(session, IMAP_FOLDER(item->folder), item->path, &ok);
4501
4502         imap_threaded_subscribe(item->folder, real_oldpath, FALSE);
4503         imap_threaded_subscribe(item->folder, real_newpath, TRUE);
4504
4505         g_free(real_oldpath);
4506         g_free(real_newpath);
4507         return FALSE;
4508 }
4509
4510 static gint get_list_of_uids(IMAPSession *session, Folder *folder, IMAPFolderItem *item, GSList **msgnum_list)
4511 {
4512         GSList *uidlist, *elem;
4513         int r = -1;
4514         clist * lep_uidlist;
4515         gint ok, nummsgs = 0;
4516
4517         if (session == NULL) {
4518                 return -1;
4519         }
4520
4521         ok = imap_select(session, IMAP_FOLDER(folder), FOLDER_ITEM(item),
4522                          NULL, NULL, NULL, NULL, NULL, TRUE);
4523         if (ok != MAILIMAP_NO_ERROR) {
4524                 return -1;
4525         }
4526
4527         g_slist_free(item->uid_list);
4528         item->uid_list = NULL;
4529
4530         uidlist = NULL;
4531
4532         if (folder->account && folder->account->low_bandwidth) {
4533                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SIMPLE,
4534                                 NULL, NULL, NULL, &lep_uidlist);
4535         }
4536
4537         if (r == MAILIMAP_NO_ERROR) {
4538                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
4539                 mailimap_search_result_free(lep_uidlist);
4540         } else {
4541                 carray * lep_uidtab;
4542                 if (r != -1) { /* inited */
4543                         imap_handle_error(SESSION(session), NULL, r);
4544                         if (is_fatal(r))
4545                                 return -1;
4546                 }
4547                 r = imap_threaded_fetch_uid(folder, 1,
4548                                     &lep_uidtab);
4549                 if (r == MAILIMAP_NO_ERROR) {
4550                         uidlist = imap_uid_list_from_lep_tab(lep_uidtab);
4551                         imap_fetch_uid_list_free(lep_uidtab);
4552                 }
4553         }
4554
4555         if (r != MAILIMAP_NO_ERROR) {
4556                 imap_handle_error(SESSION(session), NULL, r);
4557                 return -1;
4558         }
4559
4560         for (elem = uidlist; elem != NULL; elem = g_slist_next(elem)) {
4561                 guint msgnum;
4562
4563                 msgnum = GPOINTER_TO_INT(elem->data);
4564
4565                 *msgnum_list = g_slist_prepend(*msgnum_list, GINT_TO_POINTER(msgnum));
4566                 item->uid_list = g_slist_prepend(item->uid_list, GINT_TO_POINTER(msgnum));
4567                 nummsgs++;
4568         }
4569         g_slist_free(uidlist);
4570
4571         return nummsgs;
4572
4573 }
4574
4575 gint imap_get_num_list(Folder *folder, FolderItem *_item, GSList **msgnum_list, gboolean *old_uids_valid)
4576 {
4577         IMAPFolderItem *item = (IMAPFolderItem *)_item;
4578         IMAPSession *session;
4579         gint nummsgs;
4580         GSList *uidlist = NULL;
4581         gchar *dir;
4582         gint known_list_len = 0;
4583         gchar *path;
4584
4585         debug_print("get_num_list\n");
4586
4587         g_return_val_if_fail(folder != NULL, -1);
4588         g_return_val_if_fail(item != NULL, -1);
4589         g_return_val_if_fail(item->item.path != NULL, -1);
4590         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
4591         g_return_val_if_fail(folder->account != NULL, -1);
4592
4593         known_list_len = g_slist_length(item->uid_list);
4594         if (!item->should_update) {
4595                 debug_print("get_num_list: nothing to update\n");
4596                 *old_uids_valid = TRUE;
4597                 if (known_list_len == item->item.total_msgs
4598                  && known_list_len > 0) {
4599                         *msgnum_list = g_slist_copy(item->uid_list);
4600                         return known_list_len;
4601                 } else {
4602                         debug_print("don't know the list length...\n");
4603                 }
4604         }
4605
4606         if (prefs_common.work_offline &&
4607             !inc_offline_should_override(FALSE,
4608                 _("Claws Mail needs network access in order "
4609                   "to access the IMAP server."))) {
4610                 return -1;
4611         }
4612
4613         path = folder_item_get_path(_item);
4614         if (!is_dir_exist(path)) {
4615                 if(is_file_exist(path))
4616                         claws_unlink(path);
4617                 make_dir_hier(path);
4618         }
4619         g_free(path);
4620
4621         debug_print("getting session...\n");
4622         session = imap_session_get(folder);
4623         g_return_val_if_fail(session != NULL, -1);
4624
4625         lock_session(session);
4626         if (FOLDER_ITEM(item)->path)
4627                 statusbar_print_all(_("Scanning folder %s/%s..."),
4628                                       FOLDER_ITEM(item)->folder->name,
4629                                       FOLDER_ITEM(item)->path);
4630         else
4631                 statusbar_print_all(_("Scanning folder %s..."),
4632                                       FOLDER_ITEM(item)->folder->name);
4633
4634         if (item->should_trash_cache) {
4635                 *old_uids_valid = FALSE;
4636                 debug_print("get_num_list: trashing num list\n");
4637                 debug_print("Freeing imap uid cache\n");
4638                 item->lastuid = 0;
4639                 g_slist_free(item->uid_list);
4640                 item->uid_list = NULL;
4641
4642                 imap_delete_all_cached_messages((FolderItem *)item);
4643         } else {
4644                 debug_print("get_num_list: updating num list\n");
4645                 *old_uids_valid = TRUE;
4646         }
4647
4648         nummsgs = get_list_of_uids(session, folder, item, &uidlist);
4649
4650         unlock_session(session);
4651
4652         /* session could be broken now, in case of fatal error */
4653
4654         debug_print("get_num_list: got %d msgs\n", nummsgs);
4655
4656         if (nummsgs < 0) {
4657                 statusbar_pop_all();
4658                 return -1;
4659         }
4660
4661         *msgnum_list = uidlist;
4662
4663         dir = folder_item_get_path((FolderItem *)item);
4664         debug_print("removing old messages from %s\n", dir);
4665         remove_numbered_files_not_in_list(dir, *msgnum_list);
4666         g_free(dir);
4667
4668         debug_print("get_num_list - ok - %i\n", nummsgs);
4669         statusbar_pop_all();
4670         item->should_trash_cache = FALSE;
4671         item->should_update = FALSE;
4672         return nummsgs;
4673 }
4674
4675 static MsgInfo *imap_parse_msg(const gchar *file, FolderItem *item)
4676 {
4677         MsgInfo *msginfo;
4678         MsgFlags flags;
4679
4680         flags.perm_flags = MSG_NEW|MSG_UNREAD;
4681         flags.tmp_flags = 0;
4682
4683         g_return_val_if_fail(item != NULL, NULL);
4684         g_return_val_if_fail(file != NULL, NULL);
4685
4686         if (folder_has_parent_of_type(item, F_QUEUE)) {
4687                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
4688         } else if (folder_has_parent_of_type(item, F_DRAFT)) {
4689                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
4690         }
4691
4692         msginfo = procheader_parse_file(file, flags, FALSE, FALSE);
4693         if (!msginfo) return NULL;
4694
4695         msginfo->plaintext_file = g_strdup(file);
4696         msginfo->folder = item;
4697
4698         return msginfo;
4699 }
4700
4701 GSList *imap_get_msginfos(Folder *folder, FolderItem *item,
4702                           GSList *msgnum_list)
4703 {
4704         IMAPSession *session;
4705         MsgInfoList *ret = NULL;
4706         gint ok;
4707
4708         debug_print("get_msginfos\n");
4709
4710         g_return_val_if_fail(folder != NULL, NULL);
4711         g_return_val_if_fail(item != NULL, NULL);
4712         g_return_val_if_fail(msgnum_list != NULL, NULL);
4713
4714         debug_print("getting session...\n");
4715         session = imap_session_get(folder);
4716         g_return_val_if_fail(session != NULL, NULL);
4717
4718         lock_session(session); /* unlocked later in the function */
4719
4720         debug_print("IMAP getting msginfos\n");
4721         ok = imap_select(session, IMAP_FOLDER(folder), item,
4722                          NULL, NULL, NULL, NULL, NULL, FALSE);
4723         if (ok != MAILIMAP_NO_ERROR) {
4724                 return NULL;
4725         }
4726         if (!(folder_has_parent_of_type(item, F_DRAFT) ||
4727               folder_has_parent_of_type(item, F_QUEUE))) {
4728                 ret = g_slist_concat(ret,
4729                         imap_get_uncached_messages(session, item,
4730                                                    msgnum_list, &ok));
4731                 if (ok != MAILIMAP_NO_ERROR)
4732                         return NULL;
4733                 unlock_session(session);
4734         } else {
4735                 MsgNumberList *sorted_list, *elem, *llast = NULL;
4736                 gint startnum, lastnum;
4737
4738                 unlock_session(session);
4739
4740                 sorted_list = g_slist_sort(g_slist_copy(msgnum_list), g_int_compare);
4741
4742                 startnum = lastnum = GPOINTER_TO_INT(sorted_list->data);
4743
4744                 llast = g_slist_last(ret);
4745                 for (elem = sorted_list;; elem = g_slist_next(elem)) {
4746                         guint num = 0;
4747
4748                         if (elem)
4749                                 num = GPOINTER_TO_INT(elem->data);
4750
4751                         if (num > lastnum + 1 || elem == NULL) {
4752                                 int i;
4753                                 for (i = startnum; i <= lastnum; ++i) {
4754                                         gchar *file;
4755                                         file = imap_fetch_msg(folder, item, i);
4756                                         if (file != NULL) {
4757                                                 MsgInfo *msginfo = imap_parse_msg(file, item);
4758                                                 if (msginfo != NULL) {
4759                                                         msginfo->msgnum = i;
4760                                                         if (llast == NULL)
4761                                                                 llast = ret = g_slist_append(ret, msginfo);
4762                                                         else {
4763                                                                 llast = g_slist_append(llast, msginfo);
4764                                                                 llast = llast->next;
4765                                                         }
4766                                                 }
4767                                                 g_free(file);
4768                                         }
4769                                 }
4770
4771                                 if (elem == NULL)
4772                                         break;
4773
4774                                 startnum = num;
4775                         }
4776                         lastnum = num;
4777                 }
4778
4779                 g_slist_free(sorted_list);
4780         }
4781         return ret;
4782 }
4783
4784 MsgInfo *imap_get_msginfo(Folder *folder, FolderItem *item, gint uid)
4785 {
4786         MsgInfo *msginfo = NULL;
4787         MsgInfoList *msginfolist;
4788         MsgNumberList numlist;
4789
4790         numlist.next = NULL;
4791         numlist.data = GINT_TO_POINTER(uid);
4792
4793         msginfolist = imap_get_msginfos(folder, item, &numlist);
4794         if (msginfolist != NULL) {
4795                 msginfo = msginfolist->data;
4796                 g_slist_free(msginfolist);
4797         }
4798
4799         return msginfo;
4800 }
4801
4802 gboolean imap_scan_required(Folder *folder, FolderItem *_item)
4803 {
4804         IMAPSession *session;
4805         IMAPFolderItem *item = (IMAPFolderItem *)_item;
4806         gint ok, exists = 0, unseen = 0;
4807         guint32 uid_next = 0, uid_val = 0;
4808         gboolean selected_folder;
4809
4810         g_return_val_if_fail(folder != NULL, FALSE);
4811         g_return_val_if_fail(item != NULL, FALSE);
4812         g_return_val_if_fail(item->item.folder != NULL, FALSE);
4813         g_return_val_if_fail(FOLDER_CLASS(item->item.folder) == &imap_class, FALSE);
4814
4815         if (item->item.path == NULL)
4816                 return FALSE;
4817
4818         if (item->should_update) {
4819                 debug_print("scan already required\n");
4820                 return TRUE;
4821         }
4822         debug_print("getting session...\n");
4823         session = imap_session_get(folder);
4824
4825         g_return_val_if_fail(session != NULL, FALSE);
4826         lock_session(session); /* unlocked later in the function */
4827
4828         selected_folder = (session->mbox != NULL) &&
4829                           (!strcmp(session->mbox, item->item.path));
4830         if (selected_folder) {
4831                 if (!session->folder_content_changed) {
4832                         ok = imap_cmd_noop(session);
4833                         if (ok != MAILIMAP_NO_ERROR) {
4834                                 debug_print("disconnected!\n");
4835                                 if (!is_fatal(ok))
4836                                         session = imap_reconnect_if_possible(folder, session);
4837                                 else
4838                                         session = imap_session_get(folder);
4839                                 if (session == NULL)
4840                                         return FALSE;
4841                         }
4842
4843                         if (session->folder_content_changed) {
4844                                 debug_print("CHANGED (self-noop)! scan_required\n");
4845                                 item->should_update = TRUE;
4846                                 if (session->uid_validity && session->uid_validity != item->item.mtime) {
4847                                         item->item.mtime = session->uid_validity;
4848                                         item->should_trash_cache = TRUE;
4849                                 }
4850                                 unlock_session(session);
4851                                 return TRUE;
4852                         }
4853                 } else {
4854                         debug_print("CHANGED (previous 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                 ok = imap_status(session, IMAP_FOLDER(folder), item->item.path, IMAP_FOLDER_ITEM(item),
4865                                  &exists, &uid_next, &uid_val, &unseen, FALSE);
4866                 if (ok != MAILIMAP_NO_ERROR) {
4867                         return FALSE;
4868                 }
4869
4870                 debug_print("exists %d, item->item.total_msgs %d\n"
4871                             "\tunseen %d, item->item.unread_msgs %d\n"
4872                             "\tuid_next %d, item->uid_next %d\n"
4873                             "\tuid_val %d, item->item.mtime %ld\n",
4874                             exists, item->item.total_msgs, unseen, item->item.unread_msgs,
4875                             uid_next, item->uid_next, uid_val, (long)(item->item.mtime));
4876                 if (exists != item->item.total_msgs
4877                     || unseen != item->item.unread_msgs
4878                     || uid_next != item->uid_next
4879                     || uid_val != item->item.mtime) {
4880                         debug_print("CHANGED (status)! scan_required\n");
4881                         item->last_change = time(NULL);
4882                         item->should_update = TRUE;
4883                         item->uid_next = uid_next;
4884                         if (uid_val != item->item.mtime) {
4885                                 item->item.mtime = uid_val;
4886                                 item->should_trash_cache = TRUE;
4887                         }
4888                         unlock_session(session);
4889                         return TRUE;
4890                 }
4891         }
4892         unlock_session(session);
4893
4894         item->should_update = FALSE;
4895         return FALSE;
4896 }
4897
4898 void imap_change_flags(Folder *folder, FolderItem *item, MsgInfo *msginfo, MsgPermFlags newflags)
4899 {
4900         IMAPSession *session;
4901         IMAPFlags flags_set = 0, flags_unset = 0;
4902         gint ok = MAILIMAP_NO_ERROR;
4903         MsgNumberList numlist;
4904         hashtable_data *ht_data = NULL;
4905
4906         g_return_if_fail(folder != NULL);
4907         g_return_if_fail(folder->klass == &imap_class);
4908         g_return_if_fail(item != NULL);
4909         g_return_if_fail(item->folder == folder);
4910         g_return_if_fail(msginfo != NULL);
4911         g_return_if_fail(msginfo->folder == item);
4912
4913         if (!MSG_IS_MARKED(msginfo->flags) &&  (newflags & MSG_MARKED))
4914                 flags_set |= IMAP_FLAG_FLAGGED;
4915         if ( MSG_IS_MARKED(msginfo->flags) && !(newflags & MSG_MARKED))
4916                 flags_unset |= IMAP_FLAG_FLAGGED;
4917
4918         if (!MSG_IS_UNREAD(msginfo->flags) &&  (newflags & MSG_UNREAD))
4919                 flags_unset |= IMAP_FLAG_SEEN;
4920         if ( MSG_IS_UNREAD(msginfo->flags) && !(newflags & MSG_UNREAD))
4921                 flags_set |= IMAP_FLAG_SEEN;
4922
4923         if (!MSG_IS_REPLIED(msginfo->flags) &&  (newflags & MSG_REPLIED))
4924                 flags_set |= IMAP_FLAG_ANSWERED;
4925         if ( MSG_IS_REPLIED(msginfo->flags) && !(newflags & MSG_REPLIED))
4926                 flags_unset |= IMAP_FLAG_ANSWERED;
4927
4928         if (!MSG_IS_FORWARDED(msginfo->flags) &&  (newflags & MSG_FORWARDED))
4929                 flags_set |= IMAP_FLAG_FORWARDED;
4930         if ( MSG_IS_FORWARDED(msginfo->flags) && !(newflags & MSG_FORWARDED))
4931                 flags_unset |= IMAP_FLAG_FORWARDED;
4932
4933         if (!MSG_IS_SPAM(msginfo->flags) &&  (newflags & MSG_SPAM)) {
4934                 flags_set |= IMAP_FLAG_SPAM;
4935                 flags_unset |= IMAP_FLAG_HAM;
4936         }
4937         if ( MSG_IS_SPAM(msginfo->flags) && !(newflags & MSG_SPAM)) {
4938                 flags_set |= IMAP_FLAG_HAM;
4939                 flags_unset |= IMAP_FLAG_SPAM;
4940         }
4941         if (!MSG_IS_DELETED(msginfo->flags) &&  (newflags & MSG_DELETED))
4942                 flags_set |= IMAP_FLAG_DELETED;
4943         if ( MSG_IS_DELETED(msginfo->flags) && !(newflags & MSG_DELETED))
4944                 flags_unset |= IMAP_FLAG_DELETED;
4945
4946         if (!flags_set && !flags_unset) {
4947                 /* the changed flags were not translatable to IMAP-speak.
4948                  * like MSG_POSTFILTERED, so just apply. */
4949                 msginfo->flags.perm_flags = newflags;
4950                 return;
4951         }
4952
4953         debug_print("getting session...\n");
4954         session = imap_session_get(folder);
4955         if (!session) {
4956                 return;
4957         }
4958
4959         if ((ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
4960             NULL, NULL, NULL, NULL, NULL, FALSE)) != MAILIMAP_NO_ERROR) {
4961                 return;
4962         }
4963         numlist.next = NULL;
4964         numlist.data = GINT_TO_POINTER(msginfo->msgnum);
4965
4966         if (IMAP_FOLDER_ITEM(item)->batching) {
4967                 /* instead of performing an UID STORE command for each message change,
4968                  * as a lot of them can change "together", we just fill in hashtables
4969                  * and defer the treatment so that we're able to send only one
4970                  * command.
4971                  */
4972                 debug_print("IMAP batch mode on, deferring flags change\n");
4973                 if (flags_set) {
4974                         ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->flags_set_table,
4975                                 GINT_TO_POINTER(flags_set));
4976                         if (ht_data == NULL) {
4977                                 ht_data = g_new0(hashtable_data, 1);
4978                                 ht_data->item = IMAP_FOLDER_ITEM(item);
4979                                 g_hash_table_insert(IMAP_FOLDER_ITEM(item)->flags_set_table,
4980                                         GINT_TO_POINTER(flags_set), ht_data);
4981                         }
4982                         ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
4983                 }
4984                 if (flags_unset) {
4985                         ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->flags_unset_table,
4986                                 GINT_TO_POINTER(flags_unset));
4987                         if (ht_data == NULL) {
4988                                 ht_data = g_new0(hashtable_data, 1);
4989                                 ht_data->item = IMAP_FOLDER_ITEM(item);
4990                                 g_hash_table_insert(IMAP_FOLDER_ITEM(item)->flags_unset_table,
4991                                         GINT_TO_POINTER(flags_unset), ht_data);
4992                         }
4993                         ht_data->msglist = g_slist_prepend(ht_data->msglist,
4994                                         GINT_TO_POINTER(msginfo->msgnum));
4995                 }
4996         } else {
4997                 debug_print("IMAP changing flags\n");
4998                 if (flags_set) {
4999                         ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item), &numlist, flags_set, NULL, TRUE);
5000                         if (ok != MAILIMAP_NO_ERROR) {
5001                                 return;
5002                         }
5003                 }
5004
5005                 if (flags_unset) {
5006                         ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item), &numlist, flags_unset, NULL, FALSE);
5007                         if (ok != MAILIMAP_NO_ERROR) {
5008                                 return;
5009                         }
5010                 }
5011         }
5012         msginfo->flags.perm_flags = newflags;
5013         return;
5014 }
5015
5016 static gint imap_remove_msg(Folder *folder, FolderItem *item, gint uid)
5017 {
5018         gint ok;
5019         IMAPSession *session;
5020         gchar *dir;
5021         MsgNumberList numlist;
5022
5023         g_return_val_if_fail(folder != NULL, -1);
5024         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
5025         g_return_val_if_fail(item != NULL, -1);
5026
5027         debug_print("getting session...\n");
5028         session = imap_session_get(folder);
5029         if (!session) return -1;
5030
5031         ok = imap_select(session, IMAP_FOLDER(folder), item,
5032                          NULL, NULL, NULL, NULL, NULL, FALSE);
5033         if (ok != MAILIMAP_NO_ERROR) {
5034                 return ok;
5035         }
5036         numlist.next = NULL;
5037         numlist.data = GINT_TO_POINTER(uid);
5038
5039         ok = imap_set_message_flags
5040                 (session, IMAP_FOLDER_ITEM(item), &numlist, IMAP_FLAG_DELETED, NULL, TRUE);
5041         if (ok != MAILIMAP_NO_ERROR) {
5042                 log_warning(LOG_PROTOCOL, _("can't set deleted flags: %d\n"), uid);
5043                 return ok;
5044         }
5045
5046         ok = imap_cmd_expunge(session);
5047
5048         if (ok != MAILIMAP_NO_ERROR) {
5049                 log_warning(LOG_PROTOCOL, _("can't expunge\n"));
5050                 return ok;
5051         }
5052
5053         IMAP_FOLDER_ITEM(item)->uid_list = g_slist_remove(
5054             IMAP_FOLDER_ITEM(item)->uid_list, numlist.data);
5055         dir = folder_item_get_path(item);
5056         if (is_dir_exist(dir))
5057                 remove_numbered_files(dir, uid, uid);
5058         g_free(dir);
5059         return MAILIMAP_NO_ERROR;
5060 }
5061
5062 static gint compare_msginfo(gconstpointer a, gconstpointer b)
5063 {
5064         return ((MsgInfo *)a)->msgnum - ((MsgInfo *)b)->msgnum;
5065 }
5066
5067 static guint gslist_find_next_num(MsgNumberList **list, guint num)
5068 {
5069         GSList *elem;
5070
5071         g_return_val_if_fail(list != NULL, -1);
5072
5073         for (elem = *list; elem != NULL; elem = g_slist_next(elem))
5074                 if (GPOINTER_TO_INT(elem->data) >= num)
5075                         break;
5076         *list = elem;
5077         return elem != NULL ? GPOINTER_TO_INT(elem->data) : (gint)-1;
5078 }
5079
5080 static gboolean flag_ok(IMAPFolderItem *item, guint flag)
5081 {
5082         if (item->ok_flags && g_slist_find(item->ok_flags, GUINT_TO_POINTER(flag))) {
5083                 debug_print("flag %d is OK\n", flag);
5084                 return TRUE;
5085         }
5086         if (item->can_create_flags == ITEM_CAN_CREATE_FLAGS) {
5087                 debug_print("creating flags is OK\n");
5088                 return TRUE;
5089         }
5090         return FALSE;
5091 }
5092
5093 /*
5094  * NEW and DELETED flags are not syncronized
5095  * - The NEW/RECENT flags in IMAP folders can not really be directly
5096  *   modified by Claws Mail
5097  * - The DELETE/DELETED flag in IMAP and Claws Mail do not have the same
5098  *   meaning, in IMAP it always removes the messages from the FolderItem
5099  *   in Claws Mail it can mean to move the message to Trash
5100  */
5101
5102 typedef struct _get_flags_data {
5103         Folder *folder;
5104         FolderItem *item;
5105         MsgInfoList *msginfo_list;
5106         GHashTable *msgflags;
5107         gboolean full_search;
5108         gboolean done;
5109 } get_flags_data;
5110
5111 static /*gint*/ void *imap_get_flags_thread(void *data)
5112 {
5113         get_flags_data *stuff = (get_flags_data *)data;
5114         Folder *folder = stuff->folder;
5115         FolderItem *fitem = (FolderItem *) stuff->item;
5116         MsgInfoList *msginfo_list = stuff->msginfo_list;
5117         GHashTable *msgflags = stuff->msgflags;
5118         GSList *elem;
5119         carray * lep_uidtab;
5120         IMAPSession *session;
5121         gint ok;
5122         int r = MAILIMAP_NO_ERROR;
5123         GHashTable *flags_hash = NULL;
5124         GHashTable *tags_hash = NULL;
5125         gboolean full_search = stuff->full_search;
5126         GSList *sorted_list = NULL;
5127         GSList *unseen = NULL, *answered = NULL, *flagged = NULL, *deleted = NULL, *forwarded = NULL, *spam = NULL;
5128         GSList *seq_list, *cur;
5129         gboolean reverse_seen = FALSE;
5130         gboolean selected_folder;
5131         gint exists_cnt, unseen_cnt;
5132         gboolean got_alien_tags = FALSE;
5133
5134         session = imap_session_get(folder);
5135
5136         if (session == NULL) {
5137                 stuff->done = TRUE;
5138                 return GINT_TO_POINTER(-1);
5139         }
5140         selected_folder = (session->mbox != NULL) &&
5141                           (!strcmp(session->mbox, fitem->path));
5142
5143         lock_session(session);
5144         if (!selected_folder) {
5145                 ok = imap_select(session, IMAP_FOLDER(folder), fitem,
5146                         &exists_cnt, NULL, &unseen_cnt, NULL, NULL, TRUE);
5147                 if (ok != MAILIMAP_NO_ERROR) {
5148                         stuff->done = TRUE;
5149                         return GINT_TO_POINTER(-1);
5150                 }
5151
5152                 if (unseen_cnt > exists_cnt / 2)
5153                         reverse_seen = TRUE;
5154         }
5155         else {
5156                 if (fitem->unread_msgs > fitem->total_msgs / 2)
5157                         reverse_seen = TRUE;
5158         }
5159
5160         sorted_list = g_slist_sort(g_slist_copy(msginfo_list), compare_msginfo);
5161         if (!full_search) {
5162                 seq_list = imap_get_lep_set_from_msglist(IMAP_FOLDER(folder), msginfo_list);
5163         } else {
5164                 struct mailimap_set * set;
5165                 set = mailimap_set_new_interval(1, 0);
5166                 seq_list = g_slist_append(NULL, set);
5167         }
5168
5169         if (folder->account && folder->account->low_bandwidth) {
5170                 for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
5171                         struct mailimap_set * imapset;
5172                         clist * lep_uidlist;
5173                         int r;
5174
5175                         imapset = cur->data;
5176                         if (reverse_seen) {
5177                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SEEN, NULL,
5178                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5179                         }
5180                         else {
5181                                 r = imap_threaded_search(folder,
5182                                                          IMAP_SEARCH_TYPE_UNSEEN, NULL,
5183                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5184                         }
5185                         if (r == MAILIMAP_NO_ERROR) {
5186                                 GSList * uidlist;
5187
5188                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5189                                 mailimap_search_result_free(lep_uidlist);
5190
5191                                 unseen = g_slist_concat(unseen, uidlist);
5192                         } else {
5193                                 imap_handle_error(SESSION(session), NULL, r);
5194                                 goto bail;
5195                         }
5196
5197                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_FLAGGED, NULL,
5198                                                  NULL, full_search ? NULL:imapset, &lep_uidlist);
5199                         if (r == MAILIMAP_NO_ERROR) {
5200                                 GSList * uidlist;
5201
5202                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5203                                 mailimap_search_result_free(lep_uidlist);
5204
5205                                 flagged = g_slist_concat(flagged, uidlist);
5206                         } else {
5207                                 imap_handle_error(SESSION(session), NULL, r);
5208                                 goto bail;
5209                         }
5210
5211                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
5212                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_ANSWERED, NULL,
5213                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5214                                 if (r == MAILIMAP_NO_ERROR) {
5215                                         GSList * uidlist;
5216
5217                                         uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5218                                         mailimap_search_result_free(lep_uidlist);
5219
5220                                         answered = g_slist_concat(answered, uidlist);
5221                                 } else {
5222                                         imap_handle_error(SESSION(session), NULL, r);
5223                                         goto bail;
5224                                 }
5225
5226                                 if (flag_ok(IMAP_FOLDER_ITEM(fitem), IMAP_FLAG_FORWARDED)) {
5227                                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_FORWARDED, NULL,
5228                                                                  NULL, full_search ? NULL:imapset, &lep_uidlist);
5229                                         if (r == MAILIMAP_NO_ERROR) {
5230                                                 GSList * uidlist;
5231
5232                                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5233                                                 mailimap_search_result_free(lep_uidlist);
5234
5235                                                 forwarded = g_slist_concat(forwarded, uidlist);
5236                                         } else {
5237                                                 imap_handle_error(SESSION(session), NULL, r);
5238                                                 goto bail;
5239                                         }
5240                                 }
5241
5242                                 if (flag_ok(IMAP_FOLDER_ITEM(fitem), IMAP_FLAG_SPAM)) {
5243                                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SPAM, NULL,
5244                                                                  NULL, full_search ? NULL:imapset, &lep_uidlist);
5245                                         if (r == MAILIMAP_NO_ERROR) {
5246                                                 GSList * uidlist;
5247
5248                                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5249                                                 mailimap_search_result_free(lep_uidlist);
5250
5251                                                 spam = g_slist_concat(spam, uidlist);
5252                                         } else {
5253                                                 imap_handle_error(SESSION(session), NULL, r);
5254                                                 goto bail;
5255                                         }
5256                                 }
5257
5258                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_DELETED, NULL,
5259                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5260                                 if (r == MAILIMAP_NO_ERROR) {
5261                                         GSList * uidlist;
5262
5263                                         uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5264                                         mailimap_search_result_free(lep_uidlist);
5265
5266                                         deleted = g_slist_concat(deleted, uidlist);
5267                                 } else {
5268                                         imap_handle_error(SESSION(session), NULL, r);
5269                                         goto bail;
5270                                 }
5271                         }
5272                 }
5273
5274         } else {
5275                 r = imap_threaded_fetch_uid_flags(folder, 1, &lep_uidtab);
5276                 if (r == MAILIMAP_NO_ERROR) {
5277                         flags_hash = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, NULL);
5278                         tags_hash = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, NULL);
5279                         imap_flags_hash_from_lep_uid_flags_tab(lep_uidtab, flags_hash, tags_hash);
5280                         imap_fetch_uid_flags_list_free(lep_uidtab);
5281                 } else {
5282                         imap_handle_error(SESSION(session), NULL, r);
5283                         goto bail;
5284                 }
5285         }
5286
5287 bail:
5288         if (r == MAILIMAP_NO_ERROR)
5289                 unlock_session(session);
5290
5291         for (elem = sorted_list; elem != NULL; elem = g_slist_next(elem)) {
5292                 MsgInfo *msginfo;
5293                 MsgPermFlags flags, oldflags;
5294                 gboolean wasnew;
5295
5296                 msginfo = (MsgInfo *) elem->data;
5297                 flags = msginfo->flags.perm_flags;
5298                 wasnew = (flags & MSG_NEW);
5299                 oldflags = flags & ~(MSG_NEW|MSG_UNREAD|MSG_REPLIED|MSG_FORWARDED|MSG_MARKED|MSG_DELETED|MSG_SPAM);
5300
5301                 if (folder->account && folder->account->low_bandwidth) {
5302                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
5303                                 flags &= ~((reverse_seen ? 0 : MSG_UNREAD | MSG_NEW) | MSG_REPLIED | MSG_FORWARDED | MSG_MARKED | MSG_SPAM);
5304                         } else {
5305                                 flags &= ~((reverse_seen ? 0 : MSG_UNREAD | MSG_NEW | MSG_MARKED));
5306                         }
5307                         if (reverse_seen)
5308                                 flags |= MSG_UNREAD | (wasnew ? MSG_NEW : 0);
5309                         if (gslist_find_next_num(&unseen, msginfo->msgnum) == msginfo->msgnum) {
5310                                 if (!reverse_seen) {
5311                                         flags |= MSG_UNREAD | (wasnew ? MSG_NEW : 0);
5312                                 } else {
5313                                         flags &= ~(MSG_UNREAD | MSG_NEW);
5314                                 }
5315                         }
5316
5317                         if (gslist_find_next_num(&flagged, msginfo->msgnum) == msginfo->msgnum)
5318                                 flags |= MSG_MARKED;
5319                         else
5320                                 flags &= ~MSG_MARKED;
5321
5322                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
5323                                 if (gslist_find_next_num(&answered, msginfo->msgnum) == msginfo->msgnum)
5324                                         flags |= MSG_REPLIED;
5325                                 else
5326                                         flags &= ~MSG_REPLIED;
5327                                 if (gslist_find_next_num(&forwarded, msginfo->msgnum) == msginfo->msgnum)
5328                                         flags |= MSG_FORWARDED;
5329                                 else
5330                                         flags &= ~MSG_FORWARDED;
5331                                 if (gslist_find_next_num(&spam, msginfo->msgnum) == msginfo->msgnum)
5332                                         flags |= MSG_SPAM;
5333                                 else
5334                                         flags &= ~MSG_SPAM;
5335                                 if (gslist_find_next_num(&deleted, msginfo->msgnum) == msginfo->msgnum)
5336                                         flags |= MSG_DELETED;
5337                                 else
5338                                         flags &= ~MSG_DELETED;
5339                         }
5340                 } else {
5341                         if (flags_hash != NULL) {
5342
5343                                 flags = GPOINTER_TO_INT(g_hash_table_lookup(flags_hash,
5344                                                 GINT_TO_POINTER(msginfo->msgnum)));
5345                         }
5346
5347                         if ((flags & MSG_UNREAD) == 0)
5348                                 flags &= ~MSG_NEW;
5349                         else if (wasnew)
5350                                 flags |= MSG_NEW;
5351                         flags |= oldflags;
5352
5353                         if (tags_hash != NULL) {
5354                                 GSList *tags = g_hash_table_lookup(tags_hash, GINT_TO_POINTER(msginfo->msgnum));
5355                                 GSList *cur;
5356
5357                                 g_slist_free(msginfo->tags);
5358                                 msginfo->tags = NULL;
5359
5360                                 for (cur = tags; cur; cur = cur->next) {
5361                                         gchar *real_tag = imap_modified_utf7_to_utf8(cur->data, TRUE);
5362                                         gint id = 0;
5363                                         id = tags_get_id_for_str(real_tag);
5364                                         if (id == -1) {
5365                                                 id = tags_add_tag(real_tag);
5366                                                 got_alien_tags = TRUE;
5367                                         }
5368                                         msginfo->tags = g_slist_append(
5369                                                                 msginfo->tags,
5370                                                                 GINT_TO_POINTER(id));
5371                                         g_free(real_tag);
5372                                 }
5373                                 slist_free_strings_full(tags);
5374                         }
5375                 }
5376
5377                 g_hash_table_insert(msgflags, msginfo, GINT_TO_POINTER(flags));
5378         }
5379
5380         if (got_alien_tags) {
5381                 tags_write_tags();
5382                 main_window_reflect_tags_changes(mainwindow_get_mainwindow());
5383         }
5384
5385         if (flags_hash)
5386                 g_hash_table_destroy(flags_hash);
5387         if (tags_hash)
5388                 g_hash_table_destroy(tags_hash);
5389
5390         imap_lep_set_free(seq_list);
5391         g_slist_free(flagged);
5392         g_slist_free(deleted);
5393         g_slist_free(answered);
5394         g_slist_free(forwarded);
5395         g_slist_free(spam);
5396         g_slist_free(unseen);
5397         g_slist_free(sorted_list);
5398
5399         stuff->done = TRUE;
5400         return GINT_TO_POINTER(0);
5401 }
5402
5403 static gint imap_get_flags(Folder *folder, FolderItem *item,
5404                            MsgInfoList *msginfo_list, GHashTable *msgflags)
5405 {
5406         gint result;
5407         get_flags_data *data = g_new0(get_flags_data, 1);
5408         data->done = FALSE;
5409         data->folder = folder;
5410         data->item = item;
5411         data->msginfo_list = msginfo_list;
5412         data->msgflags = msgflags;
5413         data->full_search = FALSE;
5414
5415         GSList *tmp = NULL, *cur;
5416
5417         if (prefs_common.work_offline &&
5418             !inc_offline_should_override(FALSE,
5419                 _("Claws Mail needs network access in order "
5420                   "to access the IMAP server."))) {
5421                 g_free(data);
5422                 return -1;
5423         }
5424
5425         tmp = folder_item_get_msg_list(item);
5426
5427         if (g_slist_length(tmp) <= g_slist_length(msginfo_list))
5428                 data->full_search = TRUE;
5429
5430         for (cur = tmp; cur; cur = cur->next)
5431                 procmsg_msginfo_free((MsgInfo **)&(cur->data));
5432
5433         g_slist_free(tmp);
5434
5435         result = GPOINTER_TO_INT(imap_get_flags_thread(data));
5436
5437         g_free(data);
5438         return result;
5439
5440 }
5441
5442 static gboolean process_flags(gpointer key, gpointer value, gpointer user_data)
5443 {
5444         gboolean flags_set = GPOINTER_TO_INT(user_data);
5445         gint flags_value = GPOINTER_TO_INT(key);
5446         hashtable_data *data = (hashtable_data *)value;
5447         IMAPFolderItem *_item = data->item;
5448         FolderItem *item = (FolderItem *)_item;
5449         gint ok = MAILIMAP_ERROR_BAD_STATE;
5450         IMAPSession *session = NULL;
5451
5452         debug_print("getting session...\n");
5453         session = imap_session_get(item->folder);
5454
5455         data->msglist = g_slist_reverse(data->msglist);
5456
5457         debug_print("IMAP %ssetting flags to %d for %d messages\n",
5458                 flags_set?"":"un",
5459                 flags_value,
5460                 g_slist_length(data->msglist));
5461
5462         lock_session(session);
5463         if (session) {
5464                 ok = imap_select(session, IMAP_FOLDER(item->folder), item,
5465                          NULL, NULL, NULL, NULL, NULL, FALSE);
5466         }
5467         if (ok == MAILIMAP_NO_ERROR) {
5468                 ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item),
5469                         data->msglist, flags_value, NULL, flags_set);
5470         } else {
5471                 g_warning("can't select mailbox %s", item->path);
5472         }
5473
5474         if (!is_fatal(ok))
5475                 unlock_session(session);
5476
5477         g_slist_free(data->msglist);
5478         g_free(data);
5479         return TRUE;
5480 }
5481
5482 static gboolean process_tags(gpointer key, gpointer value, gpointer user_data)
5483 {
5484         gboolean tags_set = GPOINTER_TO_INT(user_data);
5485         TagsData *data = (TagsData *)value;
5486         IMAPFolderItem *_item = data->item;
5487         FolderItem *item = (FolderItem *)_item;
5488         gchar *str = data->str;
5489         gint ok = MAILIMAP_ERROR_BAD_STATE;
5490         IMAPSession *session = NULL;
5491
5492         debug_print("getting session...\n");
5493         session = imap_session_get(item->folder);
5494
5495         data->msglist = g_slist_reverse(data->msglist);
5496
5497         debug_print("IMAP %ssetting tags %s for %d messages\n",
5498                 tags_set?"":"un",
5499                 str,
5500                 g_slist_length(data->msglist));
5501
5502         lock_session(session);
5503         if (session) {
5504                 ok = imap_select(session, IMAP_FOLDER(item->folder), item,
5505                          NULL, NULL, NULL, NULL, NULL, FALSE);
5506         }
5507         if (ok == MAILIMAP_NO_ERROR) {
5508                 GSList list;
5509                 list.data = str;
5510                 list.next = NULL;
5511                 ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item),
5512                         data->msglist, 0, &list, tags_set);
5513         } else {
5514                 g_warning("can't select mailbox %s", item->path);
5515         }
5516
5517         if (!is_fatal(ok))
5518                 unlock_session(session);
5519
5520         g_slist_free(data->msglist);
5521         g_free(data->str);
5522         g_free(data);
5523         return TRUE;
5524 }
5525
5526 static void process_hashtable(IMAPFolderItem *item)
5527 {
5528         if (item->flags_set_table) {
5529                 g_hash_table_foreach_remove(item->flags_set_table, process_flags, GINT_TO_POINTER(TRUE));
5530                 g_hash_table_destroy(item->flags_set_table);
5531                 item->flags_set_table = NULL;
5532         }
5533         if (item->flags_unset_table) {
5534                 g_hash_table_foreach_remove(item->flags_unset_table, process_flags, GINT_TO_POINTER(FALSE));
5535                 g_hash_table_destroy(item->flags_unset_table);
5536                 item->flags_unset_table = NULL;
5537         }
5538         if (item->tags_set_table) {
5539                 g_hash_table_foreach_remove(item->tags_set_table, process_tags, GINT_TO_POINTER(TRUE));
5540                 g_hash_table_destroy(item->tags_set_table);
5541                 item->tags_set_table = NULL;
5542         }
5543         if (item->tags_unset_table) {
5544                 g_hash_table_foreach_remove(item->tags_unset_table, process_tags, GINT_TO_POINTER(FALSE));
5545                 g_hash_table_destroy(item->tags_unset_table);
5546                 item->tags_unset_table = NULL;
5547         }
5548
5549 }
5550
5551 static void imap_set_batch (Folder *folder, FolderItem *_item, gboolean batch)
5552 {
5553         IMAPFolderItem *item = (IMAPFolderItem *)_item;
5554         IMAPSession *session;
5555
5556         g_return_if_fail(item != NULL);
5557
5558         if (item->batching == batch)
5559                 return;
5560
5561         if (batch) {
5562                 item->batching = TRUE;
5563                 debug_print("IMAP switching to batch mode\n");
5564                 if (!item->flags_set_table) {
5565                         item->flags_set_table = g_hash_table_new(NULL, g_direct_equal);
5566                 }
5567                 if (!item->flags_unset_table) {
5568                         item->flags_unset_table = g_hash_table_new(NULL, g_direct_equal);
5569                 }
5570                 if (!item->tags_set_table) {
5571                         item->tags_set_table = g_hash_table_new(NULL, g_direct_equal);
5572                 }
5573                 if (!item->tags_unset_table) {
5574                         item->tags_unset_table = g_hash_table_new(NULL, g_direct_equal);
5575                 }
5576                 session = imap_session_get(folder);
5577                 if (session) {
5578                         imap_refresh_sensitivity(session);
5579                         session->sens_update_block = TRUE;
5580                 }
5581         } else {
5582                 debug_print("IMAP switching away from batch mode\n");
5583                 /* process stuff */
5584                 process_hashtable(item);
5585                 item->batching = FALSE;
5586                 session = imap_session_get(folder);
5587                 if (session) {
5588                         session->sens_update_block = FALSE;
5589                         imap_refresh_sensitivity(session);
5590                 }
5591         }
5592 }
5593
5594
5595
5596 /* data types conversion libetpan <-> claws */
5597
5598
5599
5600 #define ETPAN_IMAP_MB_MARKED      1
5601 #define ETPAN_IMAP_MB_UNMARKED    2
5602 #define ETPAN_IMAP_MB_NOSELECT    4
5603 #define ETPAN_IMAP_MB_NOINFERIORS 8
5604
5605 static int imap_flags_to_flags(struct mailimap_mbx_list_flags * imap_flags)
5606 {
5607   int flags;
5608   clistiter * cur;
5609
5610   flags = 0;
5611   if (imap_flags->mbf_type == MAILIMAP_MBX_LIST_FLAGS_SFLAG) {
5612     switch (imap_flags->mbf_sflag) {
5613     case MAILIMAP_MBX_LIST_SFLAG_MARKED:
5614       flags |= ETPAN_IMAP_MB_MARKED;
5615       break;
5616     case MAILIMAP_MBX_LIST_SFLAG_NOSELECT:
5617       flags |= ETPAN_IMAP_MB_NOSELECT;
5618       break;
5619     case MAILIMAP_MBX_LIST_SFLAG_UNMARKED:
5620       flags |= ETPAN_IMAP_MB_UNMARKED;
5621       break;
5622     }
5623   }
5624
5625   if (imap_flags->mbf_oflags) {
5626     for(cur = clist_begin(imap_flags->mbf_oflags) ; cur != NULL ;
5627         cur = clist_next(cur)) {
5628       struct mailimap_mbx_list_oflag * oflag;
5629
5630       oflag = clist_content(cur);
5631
5632       switch (oflag->of_type) {
5633       case MAILIMAP_MBX_LIST_OFLAG_NOINFERIORS:
5634         flags |= ETPAN_IMAP_MB_NOINFERIORS;
5635         break;
5636       }
5637     }
5638   }
5639   return flags;
5640 }
5641
5642 static GSList * imap_list_from_lep(IMAPFolder * folder,
5643                                    clist * list, const gchar * real_path, gboolean all)
5644 {
5645         clistiter * iter;
5646         GSList * item_list = NULL, *llast = NULL;
5647
5648         if (list) {
5649                 for(iter = clist_begin(list) ; iter != NULL ;
5650                     iter = clist_next(iter)) {
5651                         struct mailimap_mailbox_list * mb;
5652                         int flags;
5653                         char delimiter;
5654                         char * name;
5655                         char * dup_name;
5656                         gchar * base;
5657                         gchar * loc_name;
5658                         gchar * loc_path;
5659                         FolderItem *new_item;
5660
5661                         mb = clist_content(iter);
5662
5663                         if (mb == NULL)
5664                                 continue;
5665
5666                         flags = 0;
5667                         if (mb->mb_flag != NULL)
5668                                 flags = imap_flags_to_flags(mb->mb_flag);
5669
5670                         delimiter = mb->mb_delimiter;
5671                         name = mb->mb_name;
5672
5673                         dup_name = strdup(name);
5674                         if (delimiter != '\0')
5675                                 subst_char(dup_name, delimiter, '/');
5676
5677                         base = g_path_get_basename(dup_name);
5678                         if (base[0] == '.') {
5679                                 g_free(base);
5680                                 free(dup_name);
5681                                 continue;
5682                         }
5683                         if (!all && path_cmp(name, real_path) == 0) {
5684                                 g_free(base);
5685                                 free(dup_name);
5686                                 continue;
5687                         }
5688
5689                         if (!all && dup_name[strlen(dup_name)-1] == '/') {
5690                                 g_free(base);
5691                                 free(dup_name);
5692                                 continue;
5693                         }
5694
5695                         loc_name = imap_modified_utf7_to_utf8(base, FALSE);
5696                         loc_path = imap_modified_utf7_to_utf8(dup_name, FALSE);
5697
5698                         new_item = folder_item_new(FOLDER(folder), loc_name, loc_path);
5699                         if ((flags & ETPAN_IMAP_MB_NOINFERIORS) != 0)
5700                                 new_item->no_sub = TRUE;
5701                         if (strcasecmp(dup_name, "INBOX") != 0 &&
5702                             ((flags & ETPAN_IMAP_MB_NOSELECT) != 0))
5703                                 new_item->no_select = TRUE;
5704
5705                         if (item_list == NULL)
5706                                 llast = item_list = g_slist_append(item_list, new_item);
5707                         else {
5708                                 llast = g_slist_append(llast, new_item);
5709                                 llast = llast->next;
5710                         }
5711                         debug_print("folder '%s' found.\n", loc_path);
5712                         g_free(base);
5713                         g_free(loc_path);
5714                         g_free(loc_name);
5715
5716                         free(dup_name);
5717                 }
5718         }
5719         return item_list;
5720 }
5721
5722 static GSList * imap_get_lep_set_from_numlist(IMAPFolder *folder, MsgNumberList *numlist)
5723 {
5724         GSList *sorted_list, *cur;
5725         guint first, last, next;
5726         GSList *ret_list = NULL, *llast = NULL;
5727         struct mailimap_set * current_set;
5728         unsigned int item_count;
5729
5730         if (numlist == NULL)
5731                 return NULL;
5732
5733         current_set = mailimap_set_new_empty();
5734
5735         sorted_list = g_slist_copy(numlist);
5736         sorted_list = g_slist_sort(sorted_list, g_int_compare);
5737
5738         first = GPOINTER_TO_INT(sorted_list->data);
5739
5740         item_count = 0;
5741         for (cur = sorted_list; cur != NULL; cur = g_slist_next(cur)) {
5742                 if (GPOINTER_TO_INT(cur->data) == 0)
5743                         continue;
5744
5745                 item_count ++;
5746
5747                 last = GPOINTER_TO_INT(cur->data);
5748                 if (cur->next)
5749                         next = GPOINTER_TO_INT(cur->next->data);
5750                 else
5751                         next = 0;
5752
5753                 if (last + 1 != next || next == 0 || item_count >= folder->max_set_size) {
5754
5755                         struct mailimap_set_item * item;
5756                         item = mailimap_set_item_new(first, last);
5757                         mailimap_set_add(current_set, item);
5758
5759                         first = next;
5760
5761                         if (item_count >= folder->max_set_size) {
5762                                 if (ret_list == NULL)
5763                                         llast = ret_list = g_slist_append(ret_list,
5764                                                           current_set);
5765                                 else {
5766                                         llast = g_slist_append(llast, current_set);
5767                                         llast = llast->next;
5768                                 }
5769
5770                                 current_set = mailimap_set_new_empty();
5771                                 item_count = 0;
5772                         }
5773                 }
5774         }
5775
5776         if (clist_count(current_set->set_list) > 0) {
5777                 ret_list = g_slist_append(ret_list,
5778                                           current_set);
5779         }
5780
5781         g_slist_free(sorted_list);
5782
5783         return ret_list;
5784 }
5785
5786 static GSList * imap_get_lep_set_from_msglist(IMAPFolder *folder, MsgInfoList *msglist)
5787 {
5788         MsgNumberList *numlist = NULL;
5789         GSList *seq_list;
5790
5791         numlist = procmsg_get_number_list_for_msgs(msglist);
5792
5793         seq_list = imap_get_lep_set_from_numlist(folder, numlist);
5794         g_slist_free(numlist);
5795
5796         return seq_list;
5797 }
5798
5799 static GSList * imap_uid_list_from_lep(clist * list, gint* length)
5800 {
5801         clistiter * iter;
5802         GSList * result;
5803         gint len = 0;
5804
5805         result = NULL;
5806
5807         if (list) {
5808                 for(iter = clist_begin(list) ; iter != NULL ;
5809                     iter = clist_next(iter)) {
5810                         uint32_t * puid;
5811
5812                         puid = clist_content(iter);
5813                         result = g_slist_prepend(result, GINT_TO_POINTER(* puid));
5814                         len++;
5815                 }
5816                 result = g_slist_reverse(result);
5817         }
5818         if (length)
5819                 *length = len;
5820         return result;
5821 }
5822
5823 static GSList * imap_uid_list_from_lep_tab(carray * list)
5824 {
5825         unsigned int i;
5826         GSList * result;
5827
5828         result = NULL;
5829
5830         for(i = 0 ; i < carray_count(list) ; i ++) {
5831                 uint32_t * puid;
5832
5833                 puid = carray_get(list, i);
5834                 result = g_slist_prepend(result, GINT_TO_POINTER(* puid));
5835         }
5836         result = g_slist_reverse(result);
5837         return result;
5838 }
5839
5840 static void imap_flags_hash_from_lep_uid_flags_tab(carray * list,
5841                                                    GHashTable * hash,
5842                                                    GHashTable * tags_hash)
5843 {
5844         unsigned int i;
5845
5846         for(i = 0 ; i < carray_count(list) ; i += 3) {
5847                 uint32_t * puid;
5848                 int * pflags;
5849                 GSList *tags;
5850
5851                 puid = carray_get(list, i);
5852                 pflags = carray_get(list, i + 1);
5853                 tags = carray_get(list, i + 2);
5854
5855                 g_hash_table_insert(hash, GINT_TO_POINTER(*puid), GINT_TO_POINTER(* pflags));
5856                 g_hash_table_insert(tags_hash, GINT_TO_POINTER(*puid), tags);
5857         }
5858 }
5859
5860 static MsgInfo *imap_envelope_from_lep(struct imap_fetch_env_info * info,
5861                                        FolderItem *item)
5862 {
5863         MsgInfo *msginfo = NULL;
5864         guint32 uid = 0;
5865         goffset size = 0;
5866         MsgFlags flags = {0, 0};
5867
5868         if (info->headers == NULL)
5869                 return NULL;
5870
5871         MSG_SET_TMP_FLAGS(flags, MSG_IMAP);
5872         if (folder_has_parent_of_type(item, F_QUEUE)) {
5873                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
5874         } else if (folder_has_parent_of_type(item, F_DRAFT)) {
5875                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
5876         }
5877         flags.perm_flags = info->flags;
5878
5879         uid = info->uid;
5880         size = (goffset) info->size;
5881         msginfo = procheader_parse_str(info->headers, flags, FALSE, FALSE);
5882
5883         if (msginfo) {
5884                 msginfo->msgnum = uid;
5885                 msginfo->size = size;
5886         }
5887
5888         return msginfo;
5889 }
5890
5891 static void imap_lep_set_free(GSList *seq_list)
5892 {
5893         GSList * cur;
5894
5895         for(cur = seq_list ; cur != NULL ; cur = g_slist_next(cur)) {
5896                 struct mailimap_set * imapset;
5897
5898                 imapset = cur->data;
5899                 mailimap_set_free(imapset);
5900         }
5901         g_slist_free(seq_list);
5902 }
5903
5904 static struct mailimap_flag_list * imap_flag_to_lep(IMAPFolderItem *item, IMAPFlags flags, GSList *tags)
5905 {
5906         struct mailimap_flag_list * flag_list;
5907         GSList *cur = tags;
5908
5909         flag_list = mailimap_flag_list_new_empty();
5910
5911         if (IMAP_IS_SEEN(flags))
5912                 mailimap_flag_list_add(flag_list,
5913                                        mailimap_flag_new_seen());
5914         if (IMAP_IS_ANSWERED(flags))
5915                 mailimap_flag_list_add(flag_list,
5916                                        mailimap_flag_new_answered());
5917         if (IMAP_IS_FLAGGED(flags))
5918                 mailimap_flag_list_add(flag_list,
5919                                        mailimap_flag_new_flagged());
5920         if (IMAP_IS_DELETED(flags))
5921                 mailimap_flag_list_add(flag_list,
5922                                        mailimap_flag_new_deleted());
5923         if (IMAP_IS_DRAFT(flags))
5924                 mailimap_flag_list_add(flag_list,
5925                                        mailimap_flag_new_draft());
5926         if (IMAP_IS_FORWARDED(flags) && flag_ok(item, IMAP_FLAG_FORWARDED))
5927                 mailimap_flag_list_add(flag_list,
5928                                        mailimap_flag_new_flag_keyword(strdup(RTAG_FORWARDED)));
5929         if (IMAP_IS_SPAM(flags) && flag_ok(item, IMAP_FLAG_SPAM))
5930                 mailimap_flag_list_add(flag_list,
5931                                        mailimap_flag_new_flag_keyword(strdup(RTAG_JUNK)));
5932         else if (IMAP_IS_HAM(flags) && flag_ok(item, IMAP_FLAG_HAM))
5933                 mailimap_flag_list_add(flag_list,
5934                                        mailimap_flag_new_flag_keyword(strdup(RTAG_NON_JUNK)));
5935
5936         for (; cur; cur = cur->next) {
5937                 gchar *enc_str =
5938                         imap_utf8_to_modified_utf7(cur->data, TRUE);
5939                 g_strstrip(enc_str);
5940
5941                 mailimap_flag_list_add(flag_list,
5942                         mailimap_flag_new_flag_keyword(enc_str));
5943         }
5944
5945         return flag_list;
5946 }
5947
5948 guint imap_folder_get_refcnt(Folder *folder)
5949 {
5950         return ((IMAPFolder *)folder)->refcnt;
5951 }
5952
5953 void imap_folder_ref(Folder *folder)
5954 {
5955         ((IMAPFolder *)folder)->refcnt++;
5956 }
5957
5958 void imap_disconnect_all(gboolean have_connectivity)
5959 {
5960         GList *list;
5961         gboolean short_timeout;
5962 #ifdef HAVE_NETWORKMANAGER_SUPPORT
5963         GError *error = NULL;
5964
5965         short_timeout = !networkmanager_is_online(&error);
5966         if(error) {
5967                 short_timeout = TRUE;
5968                 g_error_free(error);
5969         }
5970 #else
5971         short_timeout = TRUE;
5972 #endif
5973
5974         if(short_timeout)
5975                 imap_main_set_timeout(1);
5976
5977         for (list = account_get_list(); list != NULL; list = list->next) {
5978                 PrefsAccount *account = list->data;
5979                 if (account->protocol == A_IMAP4) {
5980                         RemoteFolder *folder = (RemoteFolder *)account->folder;
5981                         if (folder && folder->session) {
5982                                 if (imap_is_busy(FOLDER(folder)))
5983                                         imap_threaded_cancel(FOLDER(folder));
5984
5985                                 IMAPSession *session = (IMAPSession *)folder->session;
5986                                 if (have_connectivity)
5987                                         imap_threaded_disconnect(FOLDER(folder));
5988                                 SESSION(session)->state = SESSION_DISCONNECTED;
5989                                 SESSION(session)->sock = NULL;
5990                                 imap_safe_destroy(session);
5991                                 folder->session = NULL;
5992                         }
5993                 }
5994         }
5995
5996         if(short_timeout)
5997                 imap_main_set_timeout(prefs_common.io_timeout_secs);
5998 }
5999
6000 void imap_folder_unref(Folder *folder)
6001 {
6002         if (((IMAPFolder *)folder)->refcnt > 0)
6003                 ((IMAPFolder *)folder)->refcnt--;
6004 }
6005
6006 void imap_cancel_all(void)
6007 {
6008         GList *folderlist;
6009         GList *cur;
6010
6011         folderlist = folder_get_list();
6012         for (cur = folderlist; cur != NULL; cur = g_list_next(cur)) {
6013                 Folder *folder = (Folder *) cur->data;
6014
6015                 if (folder->klass == &imap_class) {
6016                         if (imap_is_busy(folder)) {
6017                                 IMAPSession *imap_session;
6018                                 RemoteFolder *rfolder;
6019
6020                                 g_printerr("cancelled\n");
6021                                 imap_threaded_cancel(folder);
6022                                 rfolder = (RemoteFolder *) folder;
6023                                 imap_session = (IMAPSession *) rfolder->session;
6024                                 if (imap_session)
6025                                         imap_session->cancelled = 1;
6026                         }
6027                 }
6028         }
6029 }
6030
6031 gboolean imap_cancel_all_enabled(void)
6032 {
6033         GList *folderlist;
6034         GList *cur;
6035
6036         folderlist = folder_get_list();
6037         for (cur = folderlist; cur != NULL; cur = g_list_next(cur)) {
6038                 Folder *folder = (Folder *) cur->data;
6039
6040                 if (folder->klass == &imap_class) {
6041                         if (imap_is_busy(folder)) {
6042                                 return TRUE;
6043                         }
6044                 }
6045         }
6046
6047         return FALSE;
6048 }
6049
6050 static gboolean imap_is_busy(Folder *folder)
6051 {
6052         IMAPSession *imap_session;
6053         RemoteFolder *rfolder;
6054
6055         rfolder = (RemoteFolder *) folder;
6056         imap_session = (IMAPSession *) rfolder->session;
6057         if (imap_session == NULL)
6058                 return FALSE;
6059
6060         return imap_session->busy;
6061 }
6062
6063 #else /* HAVE_LIBETPAN */
6064
6065 static FolderClass imap_class;
6066
6067 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item);
6068 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag);
6069
6070 static Folder   *imap_folder_new        (const gchar    *name,
6071                                          const gchar    *path)
6072 {
6073         static gboolean missing_imap_warning = TRUE;
6074         if (missing_imap_warning) {
6075                 missing_imap_warning = FALSE;
6076                 alertpanel_error(
6077                         _("You have one or more IMAP accounts "
6078                           "defined. However this version of "
6079                           "Claws Mail has been built without "
6080                           "IMAP support; your IMAP accounts are "
6081                           "disabled.\n\n"
6082                           "You probably need to "
6083                           "install libetpan and recompile "
6084                           "Claws Mail."));
6085         }
6086         return NULL;
6087 }
6088 static gint     imap_create_tree        (Folder         *folder)
6089 {
6090         return -1;
6091 }
6092 static FolderItem *imap_create_folder   (Folder         *folder,
6093                                          FolderItem     *parent,
6094                                          const gchar    *name)
6095 {
6096         return NULL;
6097 }
6098 static gint     imap_rename_folder      (Folder         *folder,
6099                                          FolderItem     *item,
6100                                          const gchar    *name)
6101 {
6102         return -1;
6103 }
6104
6105 gchar imap_get_path_separator_for_item(FolderItem *item)
6106 {
6107         return '/';
6108 }
6109
6110 FolderClass *imap_get_class(void)
6111 {
6112         if (imap_class.idstr == NULL) {
6113                 imap_class.type = F_IMAP;
6114                 imap_class.idstr = "imap";
6115                 imap_class.uistr = "IMAP";
6116
6117                 imap_class.new_folder = imap_folder_new;
6118                 imap_class.create_tree = imap_create_tree;
6119                 imap_class.create_folder = imap_create_folder;
6120                 imap_class.rename_folder = imap_rename_folder;
6121
6122                 imap_class.set_xml = folder_set_xml;
6123                 imap_class.get_xml = folder_get_xml;
6124                 imap_class.item_set_xml = imap_item_set_xml;
6125                 imap_class.item_get_xml = imap_item_get_xml;
6126                 /* nothing implemented */
6127         }
6128
6129         return &imap_class;
6130 }
6131
6132 void imap_disconnect_all(gboolean have_connectivity)
6133 {
6134 }
6135
6136 gint imap_subscribe(Folder *folder, FolderItem *item, gchar *rpath, gboolean sub)
6137 {
6138         return -1;
6139 }
6140
6141 GList * imap_scan_subtree(Folder *folder, FolderItem *item, gboolean unsubs_only, gboolean recursive)
6142 {
6143         return NULL;
6144 }
6145
6146 void imap_cache_msg(FolderItem *item, gint msgnum)
6147 {
6148 }
6149
6150 void imap_cancel_all(void)
6151 {
6152 }
6153
6154 gboolean imap_cancel_all_enabled(void)
6155 {
6156         return FALSE;
6157 }
6158
6159 #endif
6160
6161 #ifdef HAVE_LIBETPAN
6162 static void imap_synchronise(FolderItem *item, gint days)
6163 {
6164         if (IMAP_FOLDER_ITEM(item)->last_sync == IMAP_FOLDER_ITEM(item)->last_change) {
6165                 debug_print("%s already synced\n", item->path?item->path:item->name);
6166                 return;
6167         }
6168         debug_print("syncing %s\n", item->path?item->path:item->name);
6169         imap_gtk_synchronise(item, days);
6170         IMAP_FOLDER_ITEM(item)->last_sync = IMAP_FOLDER_ITEM(item)->last_change;
6171 }
6172 #endif
6173
6174 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag)
6175 {
6176 #ifdef HAVE_LIBETPAN
6177         GList *cur;
6178 #endif
6179         folder_item_set_xml(folder, item, tag);
6180
6181 #ifdef HAVE_LIBETPAN
6182         for (cur = tag->attr; cur != NULL; cur = g_list_next(cur)) {
6183                 XMLAttr *attr = (XMLAttr *) cur->data;
6184
6185                 if (!attr || !attr->name || !attr->value) continue;
6186                 if (!strcmp(attr->name, "uidnext"))
6187                         IMAP_FOLDER_ITEM(item)->uid_next = atoi(attr->value);
6188                 if (!strcmp(attr->name, "last_sync"))
6189                         IMAP_FOLDER_ITEM(item)->last_sync = atoi(attr->value);
6190                 if (!strcmp(attr->name, "last_change"))
6191                         IMAP_FOLDER_ITEM(item)->last_change = atoi(attr->value);
6192         }
6193         if (IMAP_FOLDER_ITEM(item)->last_change == 0)
6194                 IMAP_FOLDER_ITEM(item)->last_change = time(NULL);
6195 #endif
6196 }
6197
6198 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item)
6199 {
6200         XMLTag *tag;
6201
6202         tag = folder_item_get_xml(folder, item);
6203
6204 #ifdef HAVE_LIBETPAN
6205         xml_tag_add_attr(tag, xml_attr_new_int("uidnext",
6206                         IMAP_FOLDER_ITEM(item)->uid_next));
6207         xml_tag_add_attr(tag, xml_attr_new_int("last_sync",
6208                         IMAP_FOLDER_ITEM(item)->last_sync));
6209         xml_tag_add_attr(tag, xml_attr_new_int("last_change",
6210                         IMAP_FOLDER_ITEM(item)->last_change));
6211
6212 #endif
6213         return tag;
6214 }
6215
6216 /* ===================================================================
6217  * UTF-7 conversion routines as in RFC 2192
6218  * ===================================================================
6219  * These two functions from:
6220  * libimap library.
6221  * Copyright (C) 2003-2004 Pawel Salek. */
6222
6223 /* UTF7 modified base64 alphabet */
6224 static char base64chars[] =
6225   "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+,";
6226 #define UNDEFINED 64
6227
6228 /* UTF16 definitions */
6229 #define UTF16MASK       0x03FFUL
6230 #define UTF16SHIFT      10
6231 #define UTF16BASE       0x10000UL
6232 #define UTF16HIGHSTART  0xD800UL
6233 #define UTF16HIGHEND    0xDBFFUL
6234 #define UTF16LOSTART    0xDC00UL
6235 #define UTF16LOEND      0xDFFFUL
6236
6237
6238 /* Convert an IMAP mailbox to a UTF-8 string.
6239  *  dst needs to have roughly 4 times the storage space of src
6240  *    Hex encoding can triple the size of the input
6241  *    UTF-7 can be slightly denser than UTF-8
6242  *     (worst case: 8 octets UTF-7 becomes 9 octets UTF-8)
6243  */
6244 char* imap_modified_utf7_to_utf8(const char *mbox, gboolean change_spaces)
6245 {
6246   unsigned c, i, bitcount;
6247   unsigned long ucs4, utf16, bitbuf;
6248   unsigned char base64[256];
6249   const char *src;
6250   char *dst, *res  = g_malloc(2*strlen(mbox)+1);
6251
6252   dst = res;
6253   src = mbox;
6254   if(!dst) return NULL;
6255   /* initialize modified base64 decoding table */
6256   memset(base64, UNDEFINED, sizeof (base64));
6257   for (i = 0; i < sizeof (base64chars); ++i) {
6258     base64[(unsigned)base64chars[i]] = i;
6259   }
6260
6261   /* loop until end of string */
6262   while (*src != '\0') {
6263     c = *src++;
6264     /* deal with literal characters and &- */
6265     if (c != '&' || *src == '-') {
6266       /* encode literally */
6267       if (change_spaces && c == '_')
6268         *dst++ = ' ';
6269       else
6270         *dst++ = c;
6271       /* skip over the '-' if this is an &- sequence */
6272       if (c == '&') ++src;
6273     } else {
6274       /* convert modified UTF-7 -> UTF-16 -> UCS-4 -> UTF-8 -> HEX */
6275       bitbuf = 0;
6276       bitcount = 0;
6277       ucs4 = 0;
6278       while ((c = base64[(unsigned char) *src]) != UNDEFINED) {
6279         ++src;
6280         bitbuf = (bitbuf << 6) | c;
6281         bitcount += 6;
6282         /* enough bits for a UTF-16 character? */
6283         if (bitcount >= 16) {
6284           bitcount -= 16;
6285           utf16 = (bitcount ? bitbuf >> bitcount
6286                    : bitbuf) & 0xffff;
6287           /* convert UTF16 to UCS4 */
6288           if
6289             (utf16 >= UTF16HIGHSTART && utf16 <= UTF16HIGHEND) {
6290             ucs4 = (utf16 - UTF16HIGHSTART) << UTF16SHIFT;
6291             continue;
6292           } else if
6293             (utf16 >= UTF16LOSTART && utf16 <= UTF16LOEND) {
6294             ucs4 += utf16 - UTF16LOSTART + UTF16BASE;
6295           } else {
6296             ucs4 = utf16;
6297           }
6298
6299           /* convert UTF-16 range of UCS4 to UTF-8 */
6300           if (ucs4 <= 0x7fUL) {
6301             dst[0] = ucs4;
6302             dst += 1;
6303           } else if (ucs4 <= 0x7ffUL) {
6304             dst[0] = 0xc0 | (ucs4 >> 6);
6305             dst[1] = 0x80 | (ucs4 & 0x3f);
6306             dst += 2;
6307           } else if (ucs4 <= 0xffffUL) {
6308             dst[0] = 0xe0 | (ucs4 >> 12);
6309             dst[1] = 0x80 | ((ucs4 >> 6) & 0x3f);
6310             dst[2] = 0x80 | (ucs4 & 0x3f);
6311             dst += 3;
6312           } else {
6313             dst[0] = 0xf0 | (ucs4 >> 18);
6314             dst[1] = 0x80 | ((ucs4 >> 12) & 0x3f);
6315             dst[2] = 0x80 | ((ucs4 >> 6) & 0x3f);
6316             dst[3] = 0x80 | (ucs4 & 0x3f);
6317             dst += 4;
6318           }
6319         }
6320       }
6321       /* skip over trailing '-' in modified UTF-7 encoding */
6322       if (*src == '-') ++src;
6323     }
6324   }
6325   /* terminate destination string */
6326   *dst = '\0';
6327   return res;
6328 }
6329
6330 /* Convert hex coded UTF-8 string to modified UTF-7 IMAP mailbox
6331  *  dst should be about twice the length of src to deal with non-hex
6332  *  coded URLs
6333  */
6334 char* imap_utf8_to_modified_utf7(const char *src, gboolean change_spaces)
6335 {
6336   unsigned int utf8pos, utf8total, c, utf7mode, bitstogo, utf16flag;
6337   unsigned long ucs4 = 0, bitbuf = 0;
6338
6339   /* initialize hex lookup table */
6340   char *dst, *res;
6341
6342   if (!src) return NULL;
6343
6344   res = malloc(2*strlen(src)+1);
6345   dst = res;
6346   if(!dst) return NULL;
6347
6348   utf7mode = 0;
6349   utf8total = 0;
6350   bitstogo = 0;
6351   utf8pos = 0;
6352   while ((c = (unsigned char)*src) != '\0') {
6353     ++src;
6354     /* normal character? */
6355     if (c >= ' ' && c <= '~' && (c != '_' || !change_spaces)) {
6356       /* switch out of UTF-7 mode */
6357       if (utf7mode) {
6358         if (bitstogo) {
6359           *dst++ = base64chars[(bitbuf << (6 - bitstogo)) & 0x3F];
6360         }
6361         *dst++ = '-';
6362         utf7mode = 0;
6363         utf8pos  = 0;
6364         bitstogo = 0;
6365         utf8total= 0;
6366       }
6367       if (change_spaces && c == ' ')
6368         *dst++ = '_';
6369       else
6370         *dst++ = c;
6371       /* encode '&' as '&-' */
6372       if (c == '&') {
6373         *dst++ = '-';
6374       }
6375       continue;
6376     }
6377     /* switch to UTF-7 mode */
6378     if (!utf7mode) {
6379       *dst++ = '&';
6380       utf7mode = 1;
6381     }
6382     /* Encode US-ASCII characters as themselves */
6383     if (c < 0x80) {
6384       ucs4 = c;
6385     } else if (utf8total) {
6386       /* save UTF8 bits into UCS4 */
6387       ucs4 = (ucs4 << 6) | (c & 0x3FUL);
6388       if (++utf8pos < utf8total) {
6389         continue;
6390       }
6391     } else {
6392       utf8pos = 1;
6393       if (c < 0xE0) {
6394         utf8total = 2;
6395         ucs4 = c & 0x1F;
6396       } else if (c < 0xF0) {
6397         utf8total = 3;
6398         ucs4 = c & 0x0F;
6399       } else {
6400         /* NOTE: can't convert UTF8 sequences longer than 4 */
6401         utf8total = 4;
6402         ucs4 = c & 0x03;
6403       }
6404       continue;
6405     }
6406     /* loop to split ucs4 into two utf16 chars if necessary */
6407     utf8total = 0;
6408     do {
6409       if (ucs4 >= UTF16BASE) {
6410         ucs4 -= UTF16BASE;
6411         bitbuf = (bitbuf << 16) | ((ucs4 >> UTF16SHIFT)
6412                                    + UTF16HIGHSTART);
6413         ucs4 = (ucs4 & UTF16MASK) + UTF16LOSTART;
6414         utf16flag = 1;
6415       } else {
6416         bitbuf = (bitbuf << 16) | ucs4;
6417         utf16flag = 0;
6418       }
6419       bitstogo += 16;
6420       /* spew out base64 */
6421       while (bitstogo >= 6) {
6422         bitstogo -= 6;
6423         *dst++ = base64chars[(bitstogo ? (bitbuf >> bitstogo)
6424                               : bitbuf)
6425                              & 0x3F];
6426       }
6427     } while (utf16flag);
6428   }
6429   /* if in UTF-7 mode, finish in ASCII */
6430   if (utf7mode) {
6431     if (bitstogo) {
6432       *dst++ = base64chars[(bitbuf << (6 - bitstogo)) & 0x3F];
6433     }
6434     *dst++ = '-';
6435   }
6436   /* tie off string */
6437   *dst = '\0';
6438   return res;
6439 }