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         gushort port;
1135         int r;
1136         int authenticated = FALSE;
1137         gchar *buf;
1138
1139 #ifdef USE_GNUTLS
1140         /* FIXME: IMAP over SSL only... */
1141         SSLType ssl_type;
1142
1143         port = account->set_imapport ? account->imapport
1144                 : account->ssl_imap == SSL_TUNNEL ? IMAPS_PORT : IMAP4_PORT;
1145         ssl_type = account->ssl_imap;
1146 #else
1147         if (account->ssl_imap != SSL_NONE) {
1148                 if (alertpanel_full(_("Insecure connection"),
1149                         _("This connection is configured to be secured "
1150                           "using SSL/TLS, but SSL/TLS is not available "
1151                           "in this build of Claws Mail. \n\n"
1152                           "Do you want to continue connecting to this "
1153                           "server? The communication would not be "
1154                           "secure."),
1155                           GTK_STOCK_CANCEL, _("Con_tinue connecting"),
1156                           NULL, FALSE, NULL, ALERT_WARNING,
1157                           G_ALERTDEFAULT) != G_ALERTALTERNATE)
1158                         return NULL;
1159         }
1160         port = account->set_imapport ? account->imapport
1161                 : IMAP4_PORT;
1162 #endif
1163
1164         imap_init(folder);
1165         buf = g_strdup_printf(_("Account '%s': Connecting to IMAP server: %s:%d..."),
1166                                 folder->account->account_name, folder->account->recv_server,
1167                                 port);
1168         statusbar_print_all("%s", buf);
1169         log_message(LOG_PROTOCOL, "%s\n", buf);
1170         g_free(buf);
1171
1172 #ifndef G_OS_WIN32
1173         if (account->set_tunnelcmd) {
1174                 r = imap_threaded_connect_cmd(folder,
1175                                               account->tunnelcmd,
1176                                               account->recv_server,
1177                                               port);
1178         }
1179         else
1180 #endif
1181         {
1182 #ifdef USE_GNUTLS
1183                 if (ssl_type == SSL_TUNNEL) {
1184                         r = imap_threaded_connect_ssl(folder,
1185                                                       account->recv_server,
1186                                                       port);
1187                 }
1188                 else
1189 #endif
1190                 {
1191                         r = imap_threaded_connect(folder,
1192                                                   account->recv_server,
1193                                                   port);
1194                 }
1195         }
1196
1197         statusbar_pop_all();
1198         if (r == MAILIMAP_NO_ERROR_AUTHENTICATED) {
1199                 authenticated = TRUE;
1200         }
1201         else if (r == MAILIMAP_NO_ERROR_NON_AUTHENTICATED) {
1202                 authenticated = FALSE;
1203         }
1204         else {
1205 #ifdef USE_GNUTLS
1206                 if (r == MAILIMAP_ERROR_SSL)
1207                         log_error(LOG_PROTOCOL, _("SSL/TLS handshake failed\n"));
1208                 else
1209 #endif
1210                         imap_handle_error(NULL, account->recv_server, r);
1211
1212                 if(!prefs_common.no_recv_err_panel) {
1213                         alertpanel_error_log(_("Can't connect to IMAP server: %s:%d"),
1214                                          account->recv_server, port);
1215                 } else {
1216                         log_error(LOG_PROTOCOL, _("Can't connect to IMAP server: %s:%d\n"),
1217                                          account->recv_server, port);
1218                 }
1219
1220                 return NULL;
1221         }
1222
1223         session = g_new0(IMAPSession, 1);
1224         session_init(SESSION(session), account, FALSE);
1225         SESSION(session)->type             = SESSION_IMAP;
1226         SESSION(session)->server           = g_strdup(account->recv_server);
1227         SESSION(session)->port             = port;
1228         SESSION(session)->sock             = NULL;
1229
1230         SESSION(session)->destroy          = imap_session_destroy;
1231
1232         session->capability = NULL;
1233
1234         session->authenticated = authenticated;
1235         session->mbox = NULL;
1236         session->exists = 0;
1237         session->recent = 0;
1238         session->expunge = 0;
1239         session->cmd_count = 0;
1240         session->folder = folder;
1241         IMAP_FOLDER(session->folder)->last_seen_separator = 0;
1242
1243 #ifdef USE_GNUTLS
1244         if (account->ssl_imap == SSL_STARTTLS) {
1245                 gint ok;
1246
1247                 ok = imap_cmd_starttls(session);
1248                 if (ok != MAILIMAP_NO_ERROR) {
1249                         log_warning(LOG_PROTOCOL, _("Can't start STARTTLS session.\n"));
1250                         if (!is_fatal(ok)) {
1251                                 SESSION(session)->sock = NULL;
1252                                 imap_safe_destroy(session);
1253                         }
1254                         return NULL;
1255                 }
1256
1257                 imap_free_capabilities(session);
1258                 session->authenticated = FALSE;
1259                 session->uidplus = FALSE;
1260                 session->cmd_count = 1;
1261         }
1262 #endif
1263         log_message(LOG_PROTOCOL, "IMAP connection is %s-authenticated\n",
1264                     (session->authenticated) ? "pre" : "un");
1265
1266         session_register_ping(SESSION(session), imap_ping);
1267
1268         return session;
1269 }
1270
1271 static gint imap_session_authenticate(IMAPSession *session,
1272                                       PrefsAccount *account)
1273 {
1274         gchar *pass, *acc_pass = NULL;
1275         gboolean failed = FALSE;
1276         gint ok = MAILIMAP_NO_ERROR;
1277         g_return_val_if_fail(account->userid != NULL, MAILIMAP_ERROR_BAD_STATE);
1278
1279         if (!password_get(account->userid, account->recv_server, "imap",
1280                          SESSION(session)->port, &acc_pass)) {
1281                 acc_pass = passwd_store_get_account(account->account_id,
1282                                 PWS_ACCOUNT_RECV);
1283         }
1284
1285 try_again:
1286         pass = acc_pass;
1287         if (!pass && account->imap_auth_type != IMAP_AUTH_ANON && account->imap_auth_type != IMAP_AUTH_GSSAPI) {
1288                 gchar *tmp_pass;
1289                 tmp_pass = input_dialog_query_password_keep(account->recv_server,
1290                                                             account->userid,
1291                                                             &(account->session_passwd));
1292                 if (!tmp_pass) {
1293                         return MAILIMAP_NO_ERROR;
1294                 }
1295                 Xstrdup_a(pass, tmp_pass, {g_free(tmp_pass); return MAILIMAP_NO_ERROR;});
1296                 g_free(tmp_pass);
1297         } else if (account->imap_auth_type == IMAP_AUTH_ANON || account->imap_auth_type == IMAP_AUTH_GSSAPI) {
1298                 pass = "";
1299         }
1300         if ((ok = imap_auth(session, account->userid, pass, account->imap_auth_type)) != MAILIMAP_NO_ERROR) {
1301
1302                 if (!failed && !is_fatal(ok)) {
1303                         if (acc_pass != NULL) {
1304                                 memset(acc_pass, 0, strlen(acc_pass));
1305                                 g_free(acc_pass);
1306                                 acc_pass = NULL;
1307                         }
1308                         failed = TRUE;
1309                         if (account->session_passwd != NULL) {
1310                                 g_free(account->session_passwd);
1311                                 account->session_passwd = NULL;
1312                         }
1313                         goto try_again;
1314                 } else {
1315                         if (prefs_common.no_recv_err_panel) {
1316                                 log_error(LOG_PROTOCOL, _("Couldn't login to IMAP server %s.\n"), account->recv_server);
1317                                 mainwindow_show_error();
1318                         } else
1319                                 alertpanel_error_log(_("Couldn't login to IMAP server %s."), account->recv_server);
1320                 }
1321
1322                 if (acc_pass != NULL) {
1323                         memset(acc_pass, 0, strlen(acc_pass));
1324                         g_free(acc_pass);
1325                         acc_pass = NULL;
1326                 }
1327
1328                 return ok;
1329         }
1330
1331         if (acc_pass) {
1332                 memset(acc_pass, 0, strlen(acc_pass));
1333                 g_free(acc_pass);
1334         }
1335         statusbar_pop_all();
1336         session->authenticated = TRUE;
1337         return MAILIMAP_NO_ERROR;
1338 }
1339
1340 static void imap_session_destroy(Session *session)
1341 {
1342         if (session->state != SESSION_DISCONNECTED)
1343                 imap_threaded_disconnect(IMAP_SESSION(session)->folder);
1344
1345         imap_free_capabilities(IMAP_SESSION(session));
1346         g_free(IMAP_SESSION(session)->mbox);
1347 }
1348
1349 static gchar *imap_fetch_msg(Folder *folder, FolderItem *item, gint uid)
1350 {
1351         return imap_fetch_msg_full(folder, item, uid, TRUE, TRUE);
1352 }
1353
1354 static guint get_file_size_with_crs(const gchar *filename)
1355 {
1356         FILE *fp = NULL;
1357         guint cnt = 0;
1358         gchar buf[4096];
1359
1360         if (filename == NULL)
1361                 return -1;
1362
1363         fp = g_fopen(filename, "rb");
1364         if (!fp)
1365                 return -1;
1366
1367         while (fgets(buf, sizeof (buf), fp) != NULL) {
1368                 cnt += strlen(buf);
1369                 if (!strstr(buf, "\r\n") && strstr(buf, "\n"))
1370                         cnt++;
1371         }
1372
1373         fclose(fp);
1374         return cnt;
1375 }
1376
1377 static gchar *imap_get_cached_filename(FolderItem *item, guint msgnum)
1378 {
1379         gchar *path, *filename;
1380
1381         cm_return_val_if_fail(item != NULL, NULL);
1382
1383         path = folder_item_get_path(item);
1384
1385         if (!is_dir_exist(path)) {
1386                 g_free(path);
1387                 return NULL;
1388         }
1389
1390         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(msgnum), NULL);
1391
1392         if (is_dir_exist(filename)) {
1393                 g_free(filename);
1394                 filename = g_strconcat(path, G_DIR_SEPARATOR_S, ".", itos(msgnum), NULL);
1395         }
1396         g_free(path);
1397
1398         return filename;
1399 }
1400
1401 static void imap_remove_cached_msg(Folder *folder, FolderItem *item, MsgInfo *msginfo)
1402 {
1403         gchar *filename;
1404
1405         filename = imap_get_cached_filename(item, msginfo->msgnum);
1406
1407         cm_return_if_fail(filename != NULL);
1408
1409         if (is_file_exist(filename)) {
1410                 claws_unlink(filename);
1411         }
1412         g_free(filename);
1413 }
1414
1415 typedef struct _TagsData {
1416         gchar *str;
1417         GSList *msglist;
1418         IMAPFolderItem *item;
1419 } TagsData;
1420
1421 static void imap_commit_tags(FolderItem *item, MsgInfo *msginfo, GSList *tags_set, GSList *tags_unset)
1422 {
1423         IMAPSession *session;
1424         gint ok, can_create_tags;
1425         Folder *folder = NULL;
1426         TagsData *ht_data = NULL;
1427         GSList *cur;
1428
1429         g_return_if_fail(item != NULL);
1430         g_return_if_fail(msginfo != NULL);
1431
1432         folder = item->folder;
1433         debug_print("getting session...\n");
1434         session = imap_session_get(folder);
1435
1436         if (!session) {
1437                 debug_print("can't get session\n");
1438                 return;
1439         }
1440
1441         ok = imap_select(session, IMAP_FOLDER(folder), item,
1442                          NULL, NULL, NULL, NULL, &can_create_tags, FALSE);
1443
1444         if (ok != MAILIMAP_NO_ERROR) {
1445                 return;
1446         }
1447
1448
1449         if (IMAP_FOLDER_ITEM(item)->can_create_flags != ITEM_CAN_CREATE_FLAGS)
1450                 return;
1451
1452         if (IMAP_FOLDER_ITEM(item)->batching) {
1453                 /* instead of performing an UID STORE command for each message change,
1454                  * as a lot of them can change "together", we just fill in hashtables
1455                  * and defer the treatment so that we're able to send only one
1456                  * command.
1457                  */
1458                 debug_print("IMAP batch mode on, deferring tags change\n");
1459                 for (cur = tags_set; cur; cur = cur->next) {
1460                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1461                         if (cur_tag) {
1462                                 ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->tags_set_table,
1463                                         GINT_TO_POINTER(cur_tag));
1464                                 if (ht_data == NULL) {
1465                                         ht_data = g_new0(TagsData, 1);
1466                                         ht_data->str = g_strdup(tags_get_tag(cur_tag));
1467                                         ht_data->item = IMAP_FOLDER_ITEM(item);
1468                                         g_hash_table_insert(IMAP_FOLDER_ITEM(item)->tags_set_table,
1469                                                 GINT_TO_POINTER(cur_tag), ht_data);
1470                                 }
1471                                 ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
1472                         }
1473                 }
1474                 for (cur = tags_unset; cur; cur = cur->next) {
1475                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1476                         if (cur_tag) {
1477                                 ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->tags_unset_table,
1478                                         GINT_TO_POINTER(cur_tag));
1479                                 if (ht_data == NULL) {
1480                                         ht_data = g_new0(TagsData, 1);
1481                                         ht_data->str = g_strdup(tags_get_tag(cur_tag));
1482                                         ht_data->item = IMAP_FOLDER_ITEM(item);
1483                                         g_hash_table_insert(IMAP_FOLDER_ITEM(item)->tags_unset_table,
1484                                                 GINT_TO_POINTER(cur_tag), ht_data);
1485                                 }
1486                                 ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
1487                         }
1488                 }
1489         } else {
1490                 GSList *list_set = NULL;
1491                 GSList *list_unset = NULL;
1492                 GSList numlist;
1493
1494                 numlist.data = GINT_TO_POINTER(msginfo->msgnum);
1495                 numlist.next = NULL;
1496
1497                 debug_print("IMAP changing tags NOW\n");
1498                 for (cur = tags_set; cur; cur = cur->next) {
1499                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1500                         const gchar *str = tags_get_tag(cur_tag);
1501                         if (IS_NOT_RESERVED_TAG(str))
1502                                 list_set = g_slist_prepend(list_set, g_strdup(str));
1503                 }
1504                 if (list_set) {
1505                         ok = imap_set_message_flags(session,
1506                                 IMAP_FOLDER_ITEM(item), &numlist, 0, list_set, TRUE);
1507                         slist_free_strings_full(list_set);
1508                         if (ok != MAILIMAP_NO_ERROR) {
1509                                 return;
1510                         }
1511                 }
1512
1513                 for (cur = tags_unset; cur; cur = cur->next) {
1514                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1515                         const gchar *str = tags_get_tag(cur_tag);
1516                         if (IS_NOT_RESERVED_TAG(str))
1517                                 list_unset = g_slist_prepend(list_unset, g_strdup(str));
1518                 }
1519                 if (list_unset) {
1520                         ok = imap_set_message_flags(session,
1521                                 IMAP_FOLDER_ITEM(item), &numlist, 0, list_unset, FALSE);
1522                         slist_free_strings_full(list_unset);
1523                         if (ok != MAILIMAP_NO_ERROR) {
1524                                 return;
1525                         }
1526                 }
1527         }
1528 }
1529
1530 static gchar *imap_fetch_msg_full(Folder *folder, FolderItem *item, gint uid,
1531                                   gboolean headers, gboolean body)
1532 {
1533         gchar *path, *filename;
1534         IMAPSession *session;
1535         gint ok;
1536
1537         g_return_val_if_fail(folder != NULL, NULL);
1538         g_return_val_if_fail(item != NULL, NULL);
1539
1540         if (uid == 0)
1541                 return NULL;
1542
1543         path = folder_item_get_path(item);
1544         if (!is_dir_exist(path)) {
1545                 if(is_file_exist(path))
1546                         claws_unlink(path);
1547                 make_dir_hier(path);
1548         }
1549         g_free(path);
1550
1551         filename = imap_get_cached_filename(item, uid);
1552         debug_print("trying to fetch cached %s\n", filename);
1553
1554         if (is_file_exist(filename)) {
1555                 /* see whether the local file represents the whole message
1556                  * or not. As the IMAP server reports size with \r chars,
1557                  * we have to update the local file (UNIX \n only) size */
1558                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1559                 guint have_size = -1;
1560
1561                 if (cached)
1562                         debug_print("message %d has been already %scached.\n", uid,
1563                                 MSG_IS_FULLY_CACHED(cached->flags) ? "fully ":"");
1564
1565                 if (!cached || !MSG_IS_FULLY_CACHED(cached->flags)) {
1566                         have_size = get_file_size_with_crs(filename);
1567                         if (cached && (cached->size <= have_size || !body)) {
1568                                 ok = file_strip_crs(filename);
1569                                 if (ok == 0 && cached && cached->size <= have_size) {
1570                                         /* we have it all and stripped */
1571                                         debug_print("...fully cached in fact (%u/%zd); setting flag.\n",
1572                                                         have_size, cached->size);
1573                                         procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1574                                 }
1575                                 procmsg_msginfo_free(&cached);
1576                                 return filename;
1577                         } else if (!cached && time(NULL) - get_file_mtime(filename) < 60) {
1578                                 debug_print("message not cached and file recent, considering file complete\n");
1579                                 ok = file_strip_crs(filename);
1580                                 if (ok == 0)
1581                                         return filename;
1582                         } else {
1583                                 procmsg_msginfo_free(&cached);
1584                         }
1585                 }
1586                 if (cached && MSG_IS_FULLY_CACHED(cached->flags)) {
1587                         procmsg_msginfo_free(&cached);
1588                         return filename;
1589                 }
1590         } else {
1591                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1592                 if (cached) {
1593                         procmsg_msginfo_unset_flags(cached, MSG_FULLY_CACHED, 0);
1594                         procmsg_msginfo_free(&cached);
1595                 }
1596         }
1597
1598         debug_print("getting session...\n");
1599         session = imap_session_get(folder);
1600
1601         if (!session) {
1602                 g_free(filename);
1603                 return NULL;
1604         }
1605         session_set_access_time(SESSION(session));
1606         lock_session(session); /* unlocked later in the function */
1607
1608         debug_print("IMAP fetching messages\n");
1609         ok = imap_select(session, IMAP_FOLDER(folder), item,
1610                          NULL, NULL, NULL, NULL, NULL, FALSE);
1611         if (ok != MAILIMAP_NO_ERROR) {
1612                 g_warning("can't select mailbox %s", item->path);
1613                 g_free(filename);
1614                 return NULL;
1615         }
1616
1617         session_set_access_time(SESSION(session));
1618
1619         debug_print("getting message %d...\n", uid);
1620         ok = imap_cmd_fetch(session, (guint32)uid, filename, headers, body);
1621
1622         if (ok != MAILIMAP_NO_ERROR) {
1623                 g_warning("can't fetch message %d", uid);
1624                 g_free(filename);
1625                 return NULL;
1626         }
1627
1628         session_set_access_time(SESSION(session));
1629         unlock_session(session);
1630
1631         ok = file_strip_crs(filename);
1632
1633         if (ok == 0 && headers && body) {
1634                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1635                 if (cached) {
1636                         procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1637                         procmsg_msginfo_free(&cached);
1638                 }
1639         } else if (ok == -1) {
1640                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1641                 if (cached) {
1642                         procmsg_msginfo_unset_flags(cached, MSG_FULLY_CACHED, 0);
1643                         procmsg_msginfo_free(&cached);
1644                 }
1645         }
1646         return filename;
1647 }
1648
1649 static gboolean imap_is_msg_fully_cached(Folder *folder, FolderItem *item, gint uid)
1650 {
1651         gchar *filename;
1652         guint size = 0;
1653         MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1654
1655         if (!cached)
1656                 return FALSE;
1657
1658         if (MSG_IS_FULLY_CACHED(cached->flags)) {
1659                 procmsg_msginfo_free(&cached);
1660                 return TRUE;
1661         }
1662
1663         filename = imap_get_cached_filename(item, uid);
1664
1665         if (is_file_exist(filename)) {
1666                 if (cached && cached->total_size == cached->size) {
1667                         /* fast path */
1668                         g_free(filename);
1669                         procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1670                         return TRUE;
1671                 }
1672                 size = get_file_size_with_crs(filename);
1673         }
1674         g_free(filename);
1675         debug_print("msg %d cached, has size %d, full should be %zd.\n", uid, size, cached->size);
1676         if (cached && size >= cached->size) {
1677                 cached->total_size = cached->size;
1678                 procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1679                 procmsg_msginfo_free(&cached);
1680                 return TRUE;
1681         }
1682         if (cached)
1683                 procmsg_msginfo_free(&cached);
1684         return FALSE;
1685 }
1686
1687 void imap_cache_msg(FolderItem *item, gint msgnum)
1688 {
1689         Folder *folder = NULL;
1690
1691         if (!item)
1692                 return;
1693         folder = item->folder;
1694
1695         if (!imap_is_msg_fully_cached(folder, item, msgnum)) {
1696                 gchar *tmp = imap_fetch_msg_full(folder, item, msgnum, TRUE, TRUE);
1697                 debug_print("fetched %s\n", tmp);
1698                 g_free(tmp);
1699         }
1700 }
1701
1702 static gint imap_add_msg(Folder *folder, FolderItem *dest,
1703                          const gchar *file, MsgFlags *flags)
1704 {
1705         gint ret;
1706         GSList file_list;
1707         MsgFileInfo fileinfo;
1708
1709         g_return_val_if_fail(file != NULL, -1);
1710
1711         fileinfo.msginfo = NULL;
1712         fileinfo.file = (gchar *)file;
1713         fileinfo.flags = flags;
1714         file_list.data = &fileinfo;
1715         file_list.next = NULL;
1716
1717         ret = imap_add_msgs(folder, dest, &file_list, NULL);
1718         return ret;
1719 }
1720
1721 static gint imap_add_msgs(Folder *folder, FolderItem *dest, GSList *file_list,
1722                    GHashTable *relation)
1723 {
1724         gchar *destdir;
1725         IMAPSession *session;
1726         guint32 last_uid = 0;
1727         GSList *cur;
1728         MsgFileInfo *fileinfo;
1729         gint ok = MAILIMAP_NO_ERROR;
1730         gint curnum = 0, total = 0;
1731         gboolean missing_uids = FALSE;
1732
1733         g_return_val_if_fail(folder != NULL, -1);
1734         g_return_val_if_fail(dest != NULL, -1);
1735         g_return_val_if_fail(file_list != NULL, -1);
1736
1737         debug_print("getting session...\n");
1738         session = imap_session_get(folder);
1739         if (!session) {
1740                 return -1;
1741         }
1742         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
1743         if (is_fatal(ok)) {
1744                 g_free(destdir);
1745                 return -1;
1746         }
1747         statusbar_print_all(_("Adding messages..."));
1748         total = g_slist_length(file_list);
1749         for (cur = file_list; cur != NULL; cur = cur->next) {
1750                 IMAPFlags iflags = 0;
1751                 guint32 new_uid = 0;
1752                 gchar *real_file = NULL;
1753                 fileinfo = (MsgFileInfo *)cur->data;
1754
1755                 statusbar_progress_all(curnum, total, total < 10 ? 1:10);
1756                 curnum++;
1757
1758                 if (fileinfo->flags) {
1759                         if (MSG_IS_MARKED(*fileinfo->flags))
1760                                 iflags |= IMAP_FLAG_FLAGGED;
1761                         if (MSG_IS_REPLIED(*fileinfo->flags))
1762                                 iflags |= IMAP_FLAG_ANSWERED;
1763                         if (MSG_IS_FORWARDED(*fileinfo->flags))
1764                                 iflags |= IMAP_FLAG_FORWARDED;
1765                         if (MSG_IS_SPAM(*fileinfo->flags))
1766                                 iflags |= IMAP_FLAG_SPAM;
1767                         else
1768                                 iflags |= IMAP_FLAG_HAM;
1769                         if (!MSG_IS_UNREAD(*fileinfo->flags))
1770                                 iflags |= IMAP_FLAG_SEEN;
1771
1772                 }
1773
1774                 if (real_file == NULL)
1775                         real_file = g_strdup(fileinfo->file);
1776
1777                 if (folder_has_parent_of_type(dest, F_QUEUE) ||
1778                     folder_has_parent_of_type(dest, F_OUTBOX) ||
1779                     folder_has_parent_of_type(dest, F_DRAFT) ||
1780                     folder_has_parent_of_type(dest, F_TRASH))
1781                         iflags |= IMAP_FLAG_SEEN;
1782
1783                 ok = imap_cmd_append(session, IMAP_FOLDER_ITEM(dest), destdir, real_file, iflags,
1784                                      &new_uid);
1785
1786                 if (ok != MAILIMAP_NO_ERROR) {
1787                         g_warning("can't append message %s", real_file);
1788                         g_free(real_file);
1789                         g_free(destdir);
1790                         statusbar_progress_all(0,0,0);
1791                         statusbar_pop_all();
1792                         return -1;
1793                 } else {
1794                         debug_print("appended new message as %d\n", new_uid);
1795                         /* put the local file in the imapcache, so that we don't
1796                          * have to fetch it back later. */
1797
1798                         if (new_uid == 0) {
1799                                 missing_uids = TRUE;
1800                                 debug_print("Missing UID (0)\n");
1801                         }
1802                         if (new_uid > 0) {
1803                                 gchar *cache_path = folder_item_get_path(dest);
1804                                 if (!is_dir_exist(cache_path))
1805                                         make_dir_hier(cache_path);
1806                                 if (is_dir_exist(cache_path)) {
1807                                         gchar *cache_file = g_strconcat(
1808                                                 cache_path, G_DIR_SEPARATOR_S,
1809                                                 itos(new_uid), NULL);
1810                                         copy_file(real_file, cache_file, TRUE);
1811                                         debug_print("got UID %d, copied to cache: %s\n", new_uid, cache_file);
1812                                         g_free(cache_file);
1813                                 }
1814                                 g_free(cache_path);
1815                         }
1816                 }
1817
1818                 if (relation != NULL)
1819                         g_hash_table_insert(relation, fileinfo->msginfo != NULL ?
1820                                           (gpointer) fileinfo->msginfo : (gpointer) fileinfo,
1821                                           GINT_TO_POINTER(new_uid));
1822                 if (last_uid < new_uid) {
1823                         last_uid = new_uid;
1824                 }
1825
1826                 g_free(real_file);
1827         }
1828
1829         statusbar_progress_all(0,0,0);
1830         statusbar_pop_all();
1831
1832
1833         g_free(destdir);
1834
1835         imap_scan_required(folder, dest);
1836
1837         session = imap_session_get(folder);
1838         if (!session) {
1839                 return -1;
1840         }
1841         if (missing_uids) {
1842                 gint a;
1843                 ok = imap_select(session, IMAP_FOLDER(folder), dest,
1844                          &a, NULL, NULL, NULL, NULL, FALSE);
1845         }
1846         return last_uid;
1847 }
1848
1849 static GSList *flatten_mailimap_set(struct mailimap_set * set)
1850 {
1851         GSList *result = NULL;
1852         clistiter *list;
1853         guint32 start, end, t;
1854         GSList *cur;
1855
1856         if (!set || !set->set_list)
1857                 return NULL;
1858
1859         for (list = clist_begin(set->set_list); list; list = clist_next(list)) {
1860                 struct mailimap_set_item *item = (struct mailimap_set_item *)clist_content(list);
1861                 start = item->set_first;
1862                 end = item->set_last;
1863                 if (start <= end) {
1864                         for (t = start; t <= end; t++) {
1865                                 result = g_slist_prepend(result, GINT_TO_POINTER(t));
1866                         }
1867                 }
1868         }
1869         result = g_slist_reverse(result);
1870         if (debug_get_mode()) {
1871                 debug_print("flat imap set: ");
1872                 for (cur = result; cur; cur = cur->next) {
1873                         debug_print("%d ", GPOINTER_TO_INT(cur->data));
1874                 }
1875                 debug_print("\n");
1876         }
1877
1878         return result;
1879 }
1880 static gint imap_do_copy_msgs(Folder *folder, FolderItem *dest,
1881                               MsgInfoList *msglist, GHashTable *relation,
1882                               gboolean same_dest_ok)
1883 {
1884         FolderItem *src;
1885         gchar *destdir;
1886         GSList *seq_list, *cur;
1887         MsgInfo *msginfo;
1888         IMAPSession *session;
1889         gint ok = MAILIMAP_NO_ERROR;
1890         GHashTable *uid_hash;
1891         gint last_num = 0;
1892
1893         g_return_val_if_fail(folder != NULL, -1);
1894         g_return_val_if_fail(dest != NULL, -1);
1895         g_return_val_if_fail(msglist != NULL, -1);
1896
1897         debug_print("getting session...\n");
1898         session = imap_session_get(folder);
1899
1900         if (!session) {
1901                 return -1;
1902         }
1903
1904         msginfo = (MsgInfo *)msglist->data;
1905         src = msginfo->folder;
1906         if (!same_dest_ok && src == dest) {
1907                 g_warning("the src folder is identical to the dest.");
1908                 return -1;
1909         }
1910
1911         if (src->folder != dest->folder) {
1912                 GSList *infolist = NULL, *cur;
1913                 int res = -1;
1914                 for (cur = msglist; cur; cur = cur->next) {
1915                         msginfo = (MsgInfo *)cur->data;
1916                         MsgFileInfo *fileinfo = g_new0(MsgFileInfo, 1);
1917                         fileinfo->file = procmsg_get_message_file(msginfo);
1918                         fileinfo->flags = &(msginfo->flags);
1919                         infolist = g_slist_prepend(infolist, fileinfo);
1920                 }
1921                 infolist = g_slist_reverse(infolist);
1922                 res = folder_item_add_msgs(dest, infolist, FALSE);
1923                 for (cur = infolist; cur; cur = cur->next) {
1924                         MsgFileInfo *info = (MsgFileInfo *)cur->data;
1925                         g_free(info->file);
1926                         g_free(info);
1927                 }
1928                 g_slist_free(infolist);
1929                 return res;
1930         }
1931
1932         lock_session(session); /* unlocked later in the function */
1933
1934         ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
1935                          NULL, NULL, NULL, NULL, NULL, FALSE);
1936         if (ok != MAILIMAP_NO_ERROR) {
1937                 return ok;
1938         }
1939
1940         unlock_session(session);
1941
1942         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
1943
1944         if (is_fatal(ok)) {
1945                 g_free(destdir);
1946                 return ok;
1947         }
1948
1949         seq_list = imap_get_lep_set_from_msglist(IMAP_FOLDER(folder), msglist);
1950         uid_hash = g_hash_table_new(g_direct_hash, g_direct_equal);
1951
1952         statusbar_print_all(_("Copying messages..."));
1953         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
1954                 struct mailimap_set * seq_set;
1955                 struct mailimap_set * source = NULL;
1956                 struct mailimap_set * dest = NULL;
1957                 seq_set = cur->data;
1958
1959                 debug_print("Copying messages from %s to %s ...\n",
1960                             src->path, destdir);
1961
1962                 lock_session(session); /* unlocked later in the function */
1963                 ok = imap_cmd_copy(session, seq_set, destdir,
1964                         &source, &dest);
1965
1966                 if (is_fatal(ok)) {
1967                         session = NULL;
1968                 }
1969
1970                 if (ok == MAILIMAP_NO_ERROR) {
1971                         unlock_session(session);
1972                         if (relation && source && dest) {
1973                                 GSList *s_list = flatten_mailimap_set(source);
1974                                 GSList *d_list = flatten_mailimap_set(dest);
1975                                 GSList *s_cur, *d_cur;
1976                                 if (g_slist_length(s_list) == g_slist_length(d_list)) {
1977
1978                                         for (s_cur = s_list, d_cur = d_list;
1979                                              s_cur && d_cur;
1980                                              s_cur = s_cur->next, d_cur = d_cur->next) {
1981                                                 g_hash_table_insert(uid_hash, s_cur->data, d_cur->data);
1982                                         }
1983
1984                                 } else {
1985                                         debug_print("hhhmm, source list length != dest list length.\n");
1986                                 }
1987                                 g_slist_free(s_list);
1988                                 g_slist_free(d_list);
1989                         }
1990                 }
1991
1992
1993                 if (source)
1994                         mailimap_set_free(source);
1995                 if (dest)
1996                         mailimap_set_free(dest);
1997
1998                 if (ok != MAILIMAP_NO_ERROR) {
1999                         g_hash_table_destroy(uid_hash);
2000                         imap_lep_set_free(seq_list);
2001                         statusbar_pop_all();
2002                         return -1;
2003                 }
2004         }
2005
2006         for (cur = msglist; cur != NULL; cur = g_slist_next(cur)) {
2007                 MsgInfo *msginfo = (MsgInfo *)cur->data;
2008                 gpointer hashval;
2009
2010                 hashval = g_hash_table_lookup(uid_hash, GINT_TO_POINTER(msginfo->msgnum));
2011
2012                 if (hashval != NULL) {
2013                         gint num = GPOINTER_TO_INT(hashval);
2014                         g_hash_table_insert(relation, msginfo,
2015                                           GINT_TO_POINTER(num));
2016                         if (num > last_num)
2017                                 last_num = num;
2018                         debug_print("copied message %d as %d\n", msginfo->msgnum, num);
2019                         /* put the local file in the imapcache, so that we don't
2020                          * have to fetch it back later. */
2021                         if (num > 0) {
2022                                 gchar *cache_path = folder_item_get_path(msginfo->folder);
2023                                 gchar *real_file = g_strconcat(
2024                                         cache_path, G_DIR_SEPARATOR_S,
2025                                         itos(msginfo->msgnum), NULL);
2026                                 gchar *cache_file = NULL;
2027                                 g_free(cache_path);
2028                                 cache_path = folder_item_get_path(dest);
2029                                 cache_file = g_strconcat(
2030                                         cache_path, G_DIR_SEPARATOR_S,
2031                                         itos(num), NULL);
2032                                 if (!is_dir_exist(cache_path))
2033                                         make_dir_hier(cache_path);
2034                                 if (is_file_exist(real_file) && is_dir_exist(cache_path)) {
2035                                         if (copy_file(real_file, cache_file, TRUE) < 0)
2036                                                 debug_print("couldn't cache to %s: %s\n", cache_file,
2037                                                             strerror(errno));
2038                                         else
2039                                                 debug_print("copied to cache: %s\n", cache_file);
2040                                 }
2041                                 g_free(real_file);
2042                                 g_free(cache_file);
2043                                 g_free(cache_path);
2044                         }
2045                 } else
2046                         g_hash_table_insert(relation, msginfo,
2047                                           GINT_TO_POINTER(0));
2048         }
2049         statusbar_pop_all();
2050
2051         g_hash_table_destroy(uid_hash);
2052         imap_lep_set_free(seq_list);
2053
2054         g_free(destdir);
2055
2056         IMAP_FOLDER_ITEM(dest)->lastuid = 0;
2057         IMAP_FOLDER_ITEM(dest)->uid_next = 0;
2058         g_slist_free(IMAP_FOLDER_ITEM(dest)->uid_list);
2059         IMAP_FOLDER_ITEM(dest)->uid_list = NULL;
2060
2061         imap_scan_required(folder, dest);
2062         if (ok == MAILIMAP_NO_ERROR)
2063                 return last_num;
2064         else
2065                 return -1;
2066 }
2067
2068 static gint imap_copy_msg(Folder *folder, FolderItem *dest, MsgInfo *msginfo)
2069 {
2070         GSList msglist;
2071
2072         g_return_val_if_fail(msginfo != NULL, -1);
2073
2074         msglist.data = msginfo;
2075         msglist.next = NULL;
2076
2077         return imap_copy_msgs(folder, dest, &msglist, NULL);
2078 }
2079
2080 static gint imap_copy_msgs(Folder *folder, FolderItem *dest,
2081                     MsgInfoList *msglist, GHashTable *relation)
2082 {
2083         MsgInfo *msginfo;
2084         gint ret;
2085
2086         g_return_val_if_fail(folder != NULL, -1);
2087         g_return_val_if_fail(dest != NULL, -1);
2088         g_return_val_if_fail(msglist != NULL, -1);
2089
2090         msginfo = (MsgInfo *)msglist->data;
2091         g_return_val_if_fail(msginfo->folder != NULL, -1);
2092
2093         ret = imap_do_copy_msgs(folder, dest, msglist, relation, FALSE);
2094         return ret;
2095 }
2096
2097 static gboolean imap_matcher_type_is_local(gint matchertype)
2098 {
2099         switch (matchertype) {
2100         case MATCHCRITERIA_FROM:
2101         case MATCHCRITERIA_TO:
2102         case MATCHCRITERIA_CC:
2103         case MATCHCRITERIA_TO_OR_CC:
2104         case MATCHCRITERIA_SUBJECT:
2105         case MATCHCRITERIA_REFERENCES:
2106         case MATCHCRITERIA_MESSAGEID:
2107         case MATCHCRITERIA_INREPLYTO:
2108         case MATCHCRITERIA_AGE_GREATER:
2109         case MATCHCRITERIA_AGE_LOWER:
2110         case MATCHCRITERIA_FORWARDED:
2111         case MATCHCRITERIA_SPAM:
2112         case MATCHCRITERIA_UNREAD:
2113         case MATCHCRITERIA_NEW:
2114         case MATCHCRITERIA_MARKED:
2115         case MATCHCRITERIA_REPLIED:
2116         case MATCHCRITERIA_DELETED:
2117         case MATCHCRITERIA_SIZE_GREATER:
2118         case MATCHCRITERIA_SIZE_SMALLER:
2119         case MATCHCRITERIA_SIZE_EQUAL:
2120                 return TRUE;
2121         }
2122         return FALSE;
2123 }
2124
2125 static IMAPSearchKey* search_make_key(MatcherProp* match, gboolean* is_all)
2126 {
2127         if (match->matchtype == MATCHTYPE_MATCHCASE || match->matchtype == MATCHTYPE_MATCH) {
2128                 IMAPSearchKey* result = NULL;
2129                 gboolean invert = FALSE;
2130                 gint matchertype = match->criteria;
2131
2132                 if (is_all) {
2133                         *is_all = FALSE;
2134                 }
2135
2136                 switch (matchertype) {
2137                 case MATCHCRITERIA_NOT_NEW: invert = TRUE; matchertype = MATCHCRITERIA_NEW; break;
2138                 case MATCHCRITERIA_NOT_MARKED: invert = TRUE; matchertype = MATCHCRITERIA_MARKED; break;
2139                 case MATCHCRITERIA_NOT_FORWARDED: invert = TRUE; matchertype = MATCHCRITERIA_FORWARDED; break;
2140                 case MATCHCRITERIA_NOT_SPAM: invert = TRUE; matchertype = MATCHCRITERIA_SPAM; break;
2141                 case MATCHCRITERIA_NOT_SUBJECT: invert = TRUE; matchertype = MATCHCRITERIA_SUBJECT; break;
2142                 case MATCHCRITERIA_NOT_FROM: invert = TRUE; matchertype = MATCHCRITERIA_FROM; break;
2143                 case MATCHCRITERIA_NOT_TO: invert = TRUE; matchertype = MATCHCRITERIA_TO; break;
2144                 case MATCHCRITERIA_NOT_CC: invert = TRUE; matchertype = MATCHCRITERIA_CC; break;
2145                 case MATCHCRITERIA_NOT_REFERENCES: invert = TRUE; matchertype = MATCHCRITERIA_REFERENCES; break;
2146                 case MATCHCRITERIA_NOT_HEADER: invert = TRUE; matchertype = MATCHCRITERIA_HEADER; break;
2147                 case MATCHCRITERIA_NOT_TAG: invert = TRUE; matchertype = MATCHCRITERIA_TAG; break;
2148                 case MATCHCRITERIA_NOT_HEADERS_PART: invert = TRUE; matchertype = MATCHCRITERIA_HEADERS_PART; break;
2149                 case MATCHCRITERIA_NOT_HEADERS_CONT: invert = TRUE; matchertype = MATCHCRITERIA_HEADERS_CONT; break;
2150                 case MATCHCRITERIA_NOT_MESSAGE: invert = TRUE; matchertype = MATCHCRITERIA_MESSAGE; break;
2151                 case MATCHCRITERIA_NOT_BODY_PART: invert = TRUE; matchertype = MATCHCRITERIA_BODY_PART; break;
2152                 case MATCHCRITERIA_NOT_TO_AND_NOT_CC: invert = TRUE; matchertype = MATCHCRITERIA_TO_OR_CC; break;
2153                 case MATCHCRITERIA_NOT_MESSAGEID: invert = TRUE; matchertype = MATCHCRITERIA_MESSAGEID; break;
2154                 case MATCHCRITERIA_NOT_INREPLYTO: invert = TRUE; matchertype = MATCHCRITERIA_INREPLYTO; break;
2155                 }
2156
2157                 /*
2158                  * this aborts conversion even for predicates understood by the following code.
2159                  * while that might seem wasteful, claws local search for information listed below
2160                  * has proven faster than IMAP search plus network roundtrips. once this changes,
2161                  * consider removing these exceptions.
2162                  */
2163                 if (imap_matcher_type_is_local(matchertype))
2164                         return NULL;
2165
2166                 /* the Message-ID header is also cached */
2167                 if (matchertype == MATCHCRITERIA_HEADER && g_strcmp0("Message-ID", match->header) == 0) {
2168                         return NULL;
2169                 }
2170
2171                 switch (matchertype) {
2172                 case MATCHCRITERIA_FORWARDED:
2173                         result = imap_search_new(IMAP_SEARCH_CRITERIA_TAG, NULL, RTAG_FORWARDED, 0);
2174                         break;
2175
2176                 case MATCHCRITERIA_SPAM:
2177                         result = imap_search_new(IMAP_SEARCH_CRITERIA_TAG, NULL, RTAG_JUNK, 0);
2178                         break;
2179
2180                 case MATCHCRITERIA_MESSAGEID:
2181                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, "Message-ID", match->expr, 0);
2182                         break;
2183
2184                 case MATCHCRITERIA_INREPLYTO:
2185                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, "In-Reply-To", match->expr, 0);
2186                         break;
2187
2188                 case MATCHCRITERIA_REFERENCES:
2189                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, "References", match->expr, 0);
2190                         break;
2191
2192                 case MATCHCRITERIA_TO_OR_CC:
2193                         result = imap_search_or(
2194                                         imap_search_new(IMAP_SEARCH_CRITERIA_TO, NULL, match->expr, 0),
2195                                         imap_search_new(IMAP_SEARCH_CRITERIA_CC, NULL, match->expr, 0)
2196                                         );
2197                         break;
2198
2199                 case MATCHCRITERIA_HEADERS_PART:
2200                 case MATCHCRITERIA_HEADERS_CONT:
2201                         result = imap_search_and(
2202                                         imap_search_not(imap_search_new(IMAP_SEARCH_CRITERIA_BODY, NULL, match->expr, 0)),
2203                                         imap_search_new(IMAP_SEARCH_CRITERIA_MESSAGE, NULL, match->expr, 0)
2204                                         );
2205                         break;
2206
2207                 case MATCHCRITERIA_SIZE_EQUAL:
2208                         result = imap_search_and(
2209                                         imap_search_not(imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_SMALLER, NULL, NULL, match->value)),
2210                                         imap_search_not(imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_GREATER, NULL, NULL, match->value))
2211                                         );
2212                         break;
2213
2214                 case MATCHCRITERIA_NOT_UNREAD:
2215                         result = imap_search_new(IMAP_SEARCH_CRITERIA_READ, NULL, NULL, 0);
2216                         break;
2217
2218                 case MATCHCRITERIA_UNREAD:
2219                         result = imap_search_new(IMAP_SEARCH_CRITERIA_UNREAD, NULL, NULL, 0);
2220                         break;
2221
2222                 case MATCHCRITERIA_NEW:
2223                         result = imap_search_new(IMAP_SEARCH_CRITERIA_NEW, NULL, NULL, 0);
2224                         break;
2225
2226                 case MATCHCRITERIA_MARKED:
2227                         result = imap_search_new(IMAP_SEARCH_CRITERIA_MARKED, NULL, NULL, 0);
2228                         break;
2229
2230                 case MATCHCRITERIA_DELETED:
2231                         result = imap_search_new(IMAP_SEARCH_CRITERIA_DELETED, NULL, NULL, 0);
2232                         break;
2233
2234                 case MATCHCRITERIA_REPLIED:
2235                         result = imap_search_new(IMAP_SEARCH_CRITERIA_REPLIED, NULL, NULL, 0);
2236                         break;
2237
2238                 case MATCHCRITERIA_TAG:
2239                         {
2240                                 gchar *tmp = imap_utf8_to_modified_utf7(match->expr, TRUE);
2241                                 result = imap_search_new(IMAP_SEARCH_CRITERIA_TAG, NULL, tmp, 0);
2242                                 g_free(tmp);
2243                         }
2244                         break;
2245
2246                 case MATCHCRITERIA_SUBJECT:
2247                         result = imap_search_new(IMAP_SEARCH_CRITERIA_SUBJECT, NULL, match->expr, 0);
2248                         break;
2249
2250                 case MATCHCRITERIA_FROM:
2251                         result = imap_search_new(IMAP_SEARCH_CRITERIA_FROM, NULL, match->expr, 0);
2252                         break;
2253
2254                 case MATCHCRITERIA_TO:
2255                         result = imap_search_new(IMAP_SEARCH_CRITERIA_TO, NULL, match->expr, 0);
2256                         break;
2257
2258                 case MATCHCRITERIA_CC:
2259                         result = imap_search_new(IMAP_SEARCH_CRITERIA_CC, NULL, match->expr, 0);
2260                         break;
2261
2262                 case MATCHCRITERIA_AGE_GREATER:
2263                         result = imap_search_new(IMAP_SEARCH_CRITERIA_AGE_GREATER, NULL, NULL, match->value);
2264                         break;
2265
2266                 case MATCHCRITERIA_AGE_LOWER:
2267                         result = imap_search_new(IMAP_SEARCH_CRITERIA_AGE_LOWER, NULL, NULL, match->value);
2268                         break;
2269
2270                 case MATCHCRITERIA_BODY_PART:
2271                         result = imap_search_new(IMAP_SEARCH_CRITERIA_BODY, NULL, match->expr, 0);
2272                         break;
2273
2274                 case MATCHCRITERIA_MESSAGE:
2275                         result = imap_search_new(IMAP_SEARCH_CRITERIA_MESSAGE, NULL, match->expr, 0);
2276                         break;
2277
2278                 case MATCHCRITERIA_HEADER:
2279                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, match->header, match->expr, 0);
2280                         break;
2281
2282                 case MATCHCRITERIA_SIZE_GREATER:
2283                         result = imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_GREATER, NULL, NULL, match->value);
2284                         break;
2285
2286                 case MATCHCRITERIA_SIZE_SMALLER:
2287                         result = imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_SMALLER, NULL, NULL, match->value);
2288                         break;
2289
2290                 default:
2291                         result = imap_search_new(IMAP_SEARCH_CRITERIA_ALL, NULL, NULL, 0);
2292                         if (is_all) {
2293                                 *is_all = TRUE;
2294                         }
2295                         break;
2296                 }
2297
2298                 if (invert) {
2299                         result = imap_search_not(result);
2300                         if (is_all && *is_all) {
2301                                 *is_all = FALSE;
2302                         }
2303                 }
2304
2305                 return result;
2306         }
2307
2308         return NULL;
2309 }
2310
2311 static void imap_change_search_charset(IMAPFolder *folder)
2312 {
2313         /* If server supports charset in searches, but the last used one failed,
2314          * changed to the next preferred charset. If none are still available,
2315          * disable charset searches.
2316          * Charsets are tried in the following order:
2317          * UTF-8, locale's charset, UTF-7.
2318          */
2319
2320         if (folder->search_charset_supported) {
2321                 if (folder->search_charset && !strcmp(folder->search_charset, conv_get_locale_charset_str_no_utf8()))
2322                         folder->search_charset = "UTF-8";
2323                 else if (folder->search_charset && !strcmp(folder->search_charset, "UTF-8"))
2324                         folder->search_charset = "UTF-7";
2325                 else {
2326                         folder->search_charset = NULL;
2327                         folder->search_charset_supported = FALSE;
2328                 }
2329         }
2330 }
2331
2332 static MatcherProp *imap_matcher_prop_set_charset(IMAPFolder *folder,
2333                                                   MatcherProp *utf8_prop,
2334                                                   gchar **charset)
2335 {
2336         /* If the match is going to be done locally, or the criteria is on
2337          * tag (special-cased to modified-UTF-7), or the expression searched
2338          * is ASCII, don't bother converting.
2339          */
2340         if (imap_matcher_type_is_local(utf8_prop->criteria)
2341          || utf8_prop->criteria == MATCHCRITERIA_TAG
2342          || utf8_prop->criteria == MATCHCRITERIA_NOT_TAG
2343          || utf8_prop->expr == NULL
2344          || is_ascii_str(utf8_prop->expr))
2345                 return matcherprop_new(utf8_prop->criteria,
2346                                utf8_prop->header,
2347                                utf8_prop->matchtype,
2348                                utf8_prop->expr,
2349                                utf8_prop->value);
2350         else {
2351                 gchar *conv_expr = NULL;
2352
2353                 /* If the search is server-side and the server doesn't support
2354                  * searching with the charsets we handle, bail out.
2355                  */
2356                 if (folder->search_charset_supported == FALSE)
2357                         return NULL;
2358
2359                 /* Else, convert. */
2360                 if (*charset == NULL)
2361                         *charset = g_strdup(folder->search_charset);
2362
2363                 conv_expr = conv_codeset_strdup(utf8_prop->expr, CS_UTF_8, *charset);
2364
2365                 if (conv_expr == NULL)
2366                         conv_expr = g_strdup(utf8_prop->expr);
2367
2368                 return matcherprop_new(utf8_prop->criteria,
2369                                utf8_prop->header,
2370                                utf8_prop->matchtype,
2371                                conv_expr,
2372                                utf8_prop->value);
2373         }
2374 }
2375
2376 static gint     search_msgs             (Folder                 *folder,
2377                                          FolderItem             *container,
2378                                          MsgNumberList          **msgs,
2379                                          gboolean               *on_server,
2380                                          MatcherList            *predicate,
2381                                          SearchProgressNotify   progress_cb,
2382                                          gpointer               progress_data)
2383 {
2384         IMAPSearchKey* key = NULL;
2385         GSList* cur;
2386         int result = -1;
2387         clist* uidlist = NULL;
2388         gboolean server_filtering_useless = FALSE;
2389         IMAPSession *session;
2390         gchar *charset_to_use = NULL;
2391
2392         if (on_server == NULL || !*on_server) {
2393                 return folder_item_search_msgs_local(folder, container, msgs, on_server,
2394                                 predicate, progress_cb, progress_data);
2395         }
2396
2397         for (cur = predicate->matchers; cur != NULL; cur = cur->next) {
2398                 IMAPSearchKey* matcherPart = NULL;
2399                 MatcherProp* prop = (MatcherProp*) cur->data;
2400                 gboolean is_all;
2401                 MatcherProp *imap_prop = imap_matcher_prop_set_charset(IMAP_FOLDER(folder), prop, &charset_to_use);
2402
2403                 if (imap_prop == NULL) {
2404                         /* Couldn't convert matcherprop to IMAP - probably not ascii
2405                          * and server doesn't support the charsets we do. */
2406                          return -1;
2407                 }
2408
2409                 matcherPart = search_make_key(imap_prop, &is_all);
2410
2411                 matcherprop_free(imap_prop);
2412
2413                 if (on_server) {
2414                         *on_server &= matcherPart != NULL && prop->matchtype == MATCHTYPE_MATCHCASE;
2415                 }
2416
2417                 if (matcherPart) {
2418                         if (key == NULL) {
2419                                 key = matcherPart;
2420                                 server_filtering_useless = is_all;
2421                         } else if (predicate->bool_and) {
2422                                 key = imap_search_and(key, matcherPart);
2423                                 server_filtering_useless &= is_all;
2424                         } else {
2425                                 key = imap_search_or(key, matcherPart);
2426                                 server_filtering_useless |= is_all;
2427                         }
2428                 }
2429         }
2430
2431         if (server_filtering_useless) {
2432                 imap_search_free(key);
2433                 key = NULL;
2434         }
2435
2436         if (key == NULL && progress_cb != NULL) {
2437                 GSList* cur;
2438                 GSList* list;
2439                 int count = 0;
2440
2441                 progress_cb(progress_data, TRUE, 0, 0, container->total_msgs);
2442                 progress_cb(progress_data, TRUE, container->total_msgs, 0, container->total_msgs);
2443
2444                 list = folder_item_get_msg_list(container);
2445                 for (cur = list; cur != NULL; cur = cur->next) {
2446                         *msgs = g_slist_prepend(*msgs, GUINT_TO_POINTER(((MsgInfo*) cur->data)->msgnum));
2447                         count++;
2448                 }
2449                 procmsg_msg_list_free(list);
2450
2451                 *msgs = g_slist_reverse(*msgs);
2452
2453                 return count;
2454         }
2455
2456         session = imap_session_get(folder);
2457         if (!session) {
2458                 return -1;
2459         }
2460         result = imap_select(session, IMAP_FOLDER(folder), FOLDER_ITEM(container),
2461                          NULL, NULL, NULL, NULL, NULL, TRUE);
2462         if (result != MAILIMAP_NO_ERROR)
2463                 return -1;
2464
2465         if (progress_cb)
2466                 progress_cb(progress_data, TRUE, 0, 0, container->total_msgs);
2467         result = imap_threaded_search(folder, IMAP_SEARCH_TYPE_KEYED, key, charset_to_use, NULL, &uidlist);
2468         if (progress_cb)
2469                 progress_cb(progress_data, TRUE, container->total_msgs, 0, container->total_msgs);
2470
2471         if (result == MAILIMAP_ERROR_PROTOCOL) {
2472                 debug_print("search_msgs - got protocol error, aborting\n");
2473                 imap_handle_error(SESSION(session), NULL, result);
2474                 alertpanel_error_log(_("Search failed due to server error."));
2475                 return -1;
2476         } if (result == MAILIMAP_NO_ERROR) {
2477                 gint result = 0;
2478
2479                 *msgs = imap_uid_list_from_lep(uidlist, &result);
2480
2481                 mailimap_search_result_free(uidlist);
2482
2483                 if (charset_to_use != NULL)
2484                         g_free(charset_to_use);
2485
2486                 return result;
2487         } else if (charset_to_use != NULL) {
2488                 /* If search failed and was on an 8-bit string, try the next
2489                  * available charset to search if there still are some.
2490                  */
2491                 g_free(charset_to_use);
2492
2493                 imap_change_search_charset(IMAP_FOLDER(folder));
2494                 if (IMAP_FOLDER(folder)->search_charset_supported)
2495                         return search_msgs(folder, container, msgs, on_server, predicate,
2496                                    progress_cb, progress_data);
2497                 else {
2498                         imap_handle_error(SESSION(session), NULL, result);
2499                         return -1;
2500                 }
2501         } else {
2502                 imap_handle_error(SESSION(session), NULL, result);
2503                 return -1;
2504         }
2505 }
2506
2507
2508 static gint imap_do_remove_msgs(Folder *folder, FolderItem *dest,
2509                                 MsgInfoList *msglist, GHashTable *relation)
2510 {
2511         gchar *destdir, *dir;
2512         GSList *numlist = NULL, *cur;
2513         MsgInfo *msginfo;
2514         IMAPSession *session;
2515         gint ok = MAILIMAP_NO_ERROR;
2516
2517         g_return_val_if_fail(folder != NULL, -1);
2518         g_return_val_if_fail(dest != NULL, -1);
2519         g_return_val_if_fail(msglist != NULL, -1);
2520
2521         debug_print("getting session...\n");
2522         session = imap_session_get(folder);
2523         if (!session) {
2524                 return -1;
2525         }
2526
2527         lock_session(session); /* unlocked later in the function */
2528
2529         msginfo = (MsgInfo *)msglist->data;
2530
2531         ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
2532                          NULL, NULL, NULL, NULL, NULL, FALSE);
2533         if (ok != MAILIMAP_NO_ERROR) {
2534                 return ok;
2535         }
2536
2537         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
2538         if (is_fatal(ok)) {
2539                 g_free(destdir);
2540                 return ok;
2541         }
2542         for (cur = msglist; cur; cur = cur->next) {
2543                 msginfo = (MsgInfo *)cur->data;
2544                 if (!MSG_IS_DELETED(msginfo->flags))
2545                         numlist = g_slist_prepend(numlist, GINT_TO_POINTER(msginfo->msgnum));
2546         }
2547         numlist = g_slist_reverse(numlist);
2548
2549         if (numlist != NULL) {
2550                 ok = imap_set_message_flags
2551                         (session, IMAP_FOLDER_ITEM(msginfo->folder), numlist, IMAP_FLAG_DELETED, NULL, TRUE);
2552                 if (ok != MAILIMAP_NO_ERROR) {
2553                         log_warning(LOG_PROTOCOL, _("can't set deleted flags\n"));
2554                         g_free(destdir);
2555                         return ok;
2556                 }
2557         } /* else we just need to expunge */
2558         ok = imap_cmd_expunge(session);
2559         if (ok != MAILIMAP_NO_ERROR) {
2560                 log_warning(LOG_PROTOCOL, _("can't expunge\n"));
2561                 g_free(destdir);
2562                 return ok;
2563         }
2564
2565         session->folder_content_changed = TRUE;
2566         unlock_session(session);
2567
2568         dir = folder_item_get_path(msginfo->folder);
2569         if (is_dir_exist(dir)) {
2570                 for (cur = msglist; cur; cur = cur->next) {
2571                         msginfo = (MsgInfo *)cur->data;
2572                         remove_numbered_files(dir, msginfo->msgnum, msginfo->msgnum);
2573                 }
2574         }
2575         g_free(dir);
2576
2577         g_slist_free(numlist);
2578
2579         imap_scan_required(folder, dest);
2580
2581         g_free(destdir);
2582
2583         return 0;
2584 }
2585
2586 static gint imap_remove_msgs(Folder *folder, FolderItem *dest,
2587                     MsgInfoList *msglist, GHashTable *relation)
2588 {
2589         MsgInfo *msginfo;
2590
2591         g_return_val_if_fail(folder != NULL, -1);
2592         g_return_val_if_fail(dest != NULL, -1);
2593         if (msglist == NULL)
2594                 return 0;
2595
2596         msginfo = (MsgInfo *)msglist->data;
2597         g_return_val_if_fail(msginfo->folder != NULL, -1);
2598
2599         return imap_do_remove_msgs(folder, dest, msglist, relation);
2600 }
2601
2602 static gint imap_remove_all_msg(Folder *folder, FolderItem *item)
2603 {
2604         GSList *list = folder_item_get_msg_list(item);
2605         gint res = imap_remove_msgs(folder, item, list, NULL);
2606         procmsg_msg_list_free(list);
2607         return res;
2608 }
2609
2610 static gboolean imap_is_msg_changed(Folder *folder, FolderItem *item,
2611                                     MsgInfo *msginfo)
2612 {
2613         /* TODO: properly implement this method */
2614         return FALSE;
2615 }
2616
2617 static gint imap_close(Folder *folder, FolderItem *item)
2618 {
2619         return 0;
2620 }
2621
2622 static gint imap_scan_tree_real(Folder *folder, gboolean subs_only)
2623 {
2624         FolderItem *item = NULL;
2625         IMAPSession *session;
2626         gchar *root_folder = NULL;
2627
2628         g_return_val_if_fail(folder != NULL, -1);
2629         g_return_val_if_fail(folder->account != NULL, -1);
2630
2631         debug_print("getting session...\n");
2632         session = imap_session_get(folder);
2633         if (!session) {
2634                 if (!folder->node) {
2635                         folder_tree_destroy(folder);
2636                         item = folder_item_new(folder, folder->name, NULL);
2637                         item->folder = folder;
2638                         folder->node = item->node = g_node_new(item);
2639                 }
2640                 return -1;
2641         }
2642
2643         if (folder->account->imap_dir && *folder->account->imap_dir) {
2644                 gchar *real_path;
2645                 int r = MAILIMAP_NO_ERROR;
2646                 clist * lep_list;
2647
2648                 Xstrdup_a(root_folder, folder->account->imap_dir, {return -1;});
2649                 extract_quote(root_folder, '"');
2650                 subst_char(root_folder,
2651                            imap_get_path_separator(session, IMAP_FOLDER(folder),
2652                                                    root_folder, &r),
2653                            '/');
2654                 if (is_fatal(r))
2655                         return -1;
2656                 strtailchomp(root_folder, '/');
2657                 real_path = imap_get_real_path
2658                         (session, IMAP_FOLDER(folder), root_folder, &r);
2659                 if (is_fatal(r)) {
2660                         g_free(real_path);
2661                         return -1;
2662                 }
2663                 debug_print("IMAP root directory: %s\n", real_path);
2664
2665                 /* check if root directory exist */
2666
2667                 r = imap_threaded_list(session->folder, "", real_path,
2668                                        &lep_list);
2669
2670                 if (r != MAILIMAP_NO_ERROR)
2671                         imap_handle_error(SESSION(session), NULL, r);
2672
2673                 if ((r != MAILIMAP_NO_ERROR) || (clist_count(lep_list) == 0)) {
2674                         if (!folder->node) {
2675                                 item = folder_item_new(folder, folder->name, NULL);
2676                                 item->folder = folder;
2677                                 folder->node = item->node = g_node_new(item);
2678                         }
2679                         return -1;
2680                 }
2681                 mailimap_list_result_free(lep_list);
2682
2683                 g_free(real_path);
2684         }
2685
2686         if (folder->node)
2687                 item = FOLDER_ITEM(folder->node->data);
2688
2689         if (item && !item->path && root_folder) {
2690                 item->path = g_strdup(root_folder);
2691         }
2692
2693         if (!item || ((item->path || root_folder) &&
2694                       strcmp2(item->path, root_folder) != 0)) {
2695                 folder_tree_destroy(folder);
2696                 item = folder_item_new(folder, folder->name, root_folder);
2697                 item->folder = folder;
2698                 folder->node = item->node = g_node_new(item);
2699         }
2700
2701         imap_scan_tree_recursive(session, FOLDER_ITEM(folder->node->data), subs_only);
2702         imap_create_missing_folders(folder);
2703
2704         return 0;
2705 }
2706
2707 static gint imap_scan_tree(Folder *folder)
2708 {
2709         gboolean subs_only = FALSE;
2710         if (folder->account) {
2711                 debug_print(" scanning only subs %d\n", folder->account->imap_subsonly);
2712                 subs_only = folder->account->imap_subsonly;
2713         }
2714         return imap_scan_tree_real(folder, subs_only);
2715 }
2716
2717 static gint imap_scan_tree_recursive(IMAPSession *session, FolderItem *item, gboolean subs_only)
2718 {
2719         Folder *folder;
2720         IMAPFolder *imapfolder;
2721         FolderItem *new_item;
2722         GSList *item_list, *cur;
2723         GNode *node;
2724         gchar *real_path;
2725         gchar *wildcard_path;
2726         gchar separator;
2727         gchar wildcard[3];
2728         clist * lep_list;
2729         int r = MAILIMAP_NO_ERROR;
2730
2731         g_return_val_if_fail(item != NULL, -1);
2732         g_return_val_if_fail(item->folder != NULL, -1);
2733         g_return_val_if_fail(item->no_sub == FALSE, -1);
2734
2735         folder = item->folder;
2736         imapfolder = IMAP_FOLDER(folder);
2737
2738         separator = imap_get_path_separator(session, imapfolder, item->path, &r);
2739         if (is_fatal(r))
2740                 return r;
2741
2742         if (folder->ui_func)
2743                 folder->ui_func(folder, item, folder->ui_func_data);
2744
2745         if (item->path) {
2746                 wildcard[0] = separator;
2747                 wildcard[1] = '%';
2748                 wildcard[2] = '\0';
2749                 real_path = imap_get_real_path(session, imapfolder, item->path, &r);
2750                 if (is_fatal(r)) {
2751                         g_free(real_path);
2752                         return r;
2753                 }
2754         } else {
2755                 wildcard[0] = '%';
2756                 wildcard[1] = '\0';
2757                 real_path = g_strdup("");
2758         }
2759
2760         Xstrcat_a(wildcard_path, real_path, wildcard,
2761                   {g_free(real_path); return MAILIMAP_ERROR_BAD_STATE;});
2762         lep_list = NULL;
2763
2764         if (subs_only)
2765                 r = imap_threaded_lsub(folder, "", wildcard_path, &lep_list);
2766         else
2767                 r = imap_threaded_list(folder, "", wildcard_path, &lep_list);
2768
2769         if (r != MAILIMAP_NO_ERROR) {
2770                 imap_handle_error(SESSION(session), NULL, r);
2771                 item_list = NULL;
2772                 g_free(real_path);
2773                 return r;
2774         }
2775         else {
2776                 item_list = imap_list_from_lep(imapfolder,
2777                                                lep_list, real_path, FALSE);
2778                 mailimap_list_result_free(lep_list);
2779         }
2780
2781         g_free(real_path);
2782
2783         node = item->node->children;
2784         while (node != NULL) {
2785                 FolderItem *old_item = FOLDER_ITEM(node->data);
2786                 GNode *next = node->next;
2787
2788                 new_item = NULL;
2789                 for (cur = item_list; cur != NULL; cur = cur->next) {
2790                         FolderItem *cur_item = FOLDER_ITEM(cur->data);
2791                         if (!strcmp2(old_item->path, cur_item->path)) {
2792                                 new_item = cur_item;
2793                                 break;
2794                         }
2795                 }
2796                 if (!new_item) {
2797                         if (old_item && old_item->path && !strcasecmp(old_item->path, "INBOX")) {
2798                                 debug_print("not removing INBOX\n");
2799                         } else {
2800                                 debug_print("folder '%s' not found. removing...\n",
2801                                             old_item->path);
2802                                 folder_item_remove(old_item);
2803                         }
2804                 } else {
2805                         old_item->no_sub = new_item->no_sub;
2806                         old_item->no_select = new_item->no_select;
2807                         if (old_item->no_sub == TRUE && node->children) {
2808                                 debug_print("folder '%s' doesn't have "
2809                                             "subfolders. removing...\n",
2810                                             old_item->path);
2811                                 folder_item_remove_children(old_item);
2812                         }
2813                 }
2814
2815                 node = next;
2816         }
2817
2818         for (cur = item_list; cur != NULL; cur = cur->next) {
2819                 FolderItem *cur_item = FOLDER_ITEM(cur->data);
2820                 new_item = NULL;
2821
2822                 for (node = item->node->children; node != NULL;
2823                      node = node->next) {
2824                         if (!strcmp2(FOLDER_ITEM(node->data)->path,
2825                                      cur_item->path)) {
2826                                 new_item = FOLDER_ITEM(node->data);
2827                                 folder_item_destroy(cur_item);
2828                                 cur_item = NULL;
2829                                 break;
2830                         }
2831                 }
2832                 if (!new_item) {
2833                         new_item = cur_item;
2834                         debug_print("new folder '%s' found.\n", new_item->path);
2835                         folder_item_append(item, new_item);
2836                 }
2837
2838                 if (!strcasecmp(new_item->path, "INBOX")) {
2839                         new_item->stype = F_INBOX;
2840                         folder->inbox = new_item;
2841                 } else if (!folder_item_parent(item) || item->stype == F_INBOX) {
2842                         gchar *base;
2843
2844                         base = g_path_get_basename(new_item->path);
2845
2846                         if (!folder->outbox && !g_ascii_strcasecmp(base, "Sent")) {
2847                                 new_item->stype = F_OUTBOX;
2848                                 folder->outbox = new_item;
2849                         } else if (!folder->draft && (!g_ascii_strcasecmp(base, "Drafts") || !g_ascii_strcasecmp(base, "Draft"))) {
2850                                 new_item->stype = F_DRAFT;
2851                                 folder->draft = new_item;
2852                         } else if (!folder->queue && !g_ascii_strcasecmp(base, "Queue")) {
2853                                 new_item->stype = F_QUEUE;
2854                                 folder->queue = new_item;
2855                         } else if (!folder->trash && !g_ascii_strcasecmp(base, "Trash")) {
2856                                 new_item->stype = F_TRASH;
2857                                 folder->trash = new_item;
2858                         }
2859                         g_free(base);
2860                 }
2861
2862                 if (new_item->no_sub == FALSE)
2863                         imap_scan_tree_recursive(session, new_item, subs_only);
2864         }
2865
2866         g_slist_free(item_list);
2867
2868         return MAILIMAP_NO_ERROR;
2869 }
2870
2871 GList *imap_scan_subtree(Folder *folder, FolderItem *item, gboolean unsubs_only, gboolean recursive)
2872 {
2873         IMAPSession *session = imap_session_get(folder);
2874         gchar *real_path;
2875         gchar *wildcard_path;
2876         gchar separator;
2877         gchar wildcard[3];
2878         clist * lep_list;
2879         GSList *item_list = NULL, *cur;
2880         GList *child_list = NULL, *tmplist = NULL;
2881         GSList *sub_list = NULL;
2882         int r = MAILIMAP_NO_ERROR;
2883
2884         if (!session)
2885                 return NULL;
2886
2887         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &r);
2888         if (is_fatal(r))
2889                 return NULL;
2890
2891         if (item->path) {
2892                 wildcard[0] = separator;
2893                 wildcard[1] = '%';
2894                 wildcard[2] = '\0';
2895                 real_path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &r);
2896                 if (is_fatal(r)) {
2897                         g_free(real_path);
2898                         return NULL;
2899                 }
2900         } else {
2901                 wildcard[0] = '%';
2902                 wildcard[1] = '\0';
2903                 real_path = g_strdup("");
2904         }
2905
2906         Xstrcat_a(wildcard_path, real_path, wildcard,
2907                   {g_free(real_path); return NULL;});
2908         lep_list = NULL;
2909
2910         if (unsubs_only)
2911                 statusbar_print_all(_("Looking for unsubscribed folders in %s..."),
2912                                 item->path?item->path:item->name);
2913         else
2914                 statusbar_print_all(_("Looking for subfolders of %s..."),
2915                                 item->path?item->path:item->name);
2916
2917         r = imap_threaded_list(folder, "", wildcard_path, &lep_list);
2918         if (r) {
2919                 g_free(real_path);
2920                 statusbar_pop_all();
2921                 return NULL;
2922         }
2923         item_list = imap_list_from_lep(IMAP_FOLDER(folder),
2924                                lep_list, real_path, FALSE);
2925         mailimap_list_result_free(lep_list);
2926
2927         for (cur = item_list; cur != NULL; cur = cur->next) {
2928                 FolderItem *cur_item = FOLDER_ITEM(cur->data);
2929                 if (recursive) {
2930                         tmplist = imap_scan_subtree(folder, cur_item,
2931                                         unsubs_only, recursive);
2932                         if (tmplist)
2933                                 child_list = g_list_concat(child_list, tmplist);
2934                 }
2935                 child_list = g_list_prepend(child_list,
2936                                 imap_get_real_path(session,
2937                                         IMAP_FOLDER(folder), cur_item->path, &r));
2938                 if (is_fatal(r)) {
2939                         g_free(real_path);
2940                         statusbar_pop_all();
2941                         return NULL;
2942                 }
2943                 folder_item_destroy(cur_item);
2944         }
2945         child_list = g_list_reverse(child_list);
2946         g_slist_free(item_list);
2947
2948         if (unsubs_only) {
2949                 r = imap_threaded_lsub(folder, "", wildcard_path, &lep_list);
2950                 if (r) {
2951                         g_free(real_path);
2952                         statusbar_pop_all();
2953                         return NULL;
2954                 }
2955                 sub_list = imap_list_from_lep(IMAP_FOLDER(folder),
2956                                        lep_list, real_path, FALSE);
2957                 mailimap_list_result_free(lep_list);
2958
2959                 for (cur = sub_list; cur != NULL; cur = cur->next) {
2960                         FolderItem *cur_item = FOLDER_ITEM(cur->data);
2961                         GList *oldlitem = NULL;
2962                         gchar *tmp = imap_get_real_path(session,
2963                                         IMAP_FOLDER(folder), cur_item->path, &r);
2964                         if (r) {
2965                                 g_free(real_path);
2966                                 statusbar_pop_all();
2967                                 g_free(tmp);
2968                                 return NULL;
2969                         }
2970                         folder_item_destroy(cur_item);
2971                         oldlitem = g_list_find_custom(
2972                                         child_list, tmp, (GCompareFunc)strcmp2);
2973                         if (oldlitem) {
2974                                 child_list = g_list_remove_link(child_list, oldlitem);
2975                                 g_free(oldlitem->data);
2976                                 g_list_free(oldlitem);
2977                         }
2978                         g_free(tmp);
2979                 }
2980         }
2981
2982         g_free(real_path);
2983         statusbar_pop_all();
2984
2985         return child_list;
2986 }
2987
2988 static gint imap_create_tree(Folder *folder)
2989 {
2990         g_return_val_if_fail(folder != NULL, -1);
2991         g_return_val_if_fail(folder->node != NULL, -1);
2992         g_return_val_if_fail(folder->node->data != NULL, -1);
2993         g_return_val_if_fail(folder->account != NULL, -1);
2994
2995         imap_scan_tree(folder);
2996         imap_create_missing_folders(folder);
2997
2998         return 0;
2999 }
3000
3001 static void imap_create_missing_folders(Folder *folder)
3002 {
3003         g_return_if_fail(folder != NULL);
3004
3005         if (!folder->inbox)
3006                 folder->inbox = imap_create_special_folder
3007                         (folder, F_INBOX, "INBOX");
3008         if (!folder->trash)
3009                 folder->trash = imap_create_special_folder
3010                         (folder, F_TRASH, "Trash");
3011         if (!folder->queue)
3012                 folder->queue = imap_create_special_folder
3013                         (folder, F_QUEUE, "Queue");
3014         if (!folder->outbox)
3015                 folder->outbox = imap_create_special_folder
3016                         (folder, F_OUTBOX, "Sent");
3017         if (!folder->draft)
3018                 folder->draft = imap_create_special_folder
3019                         (folder, F_DRAFT, "Drafts");
3020 }
3021
3022 static FolderItem *imap_create_special_folder(Folder *folder,
3023                                               SpecialFolderItemType stype,
3024                                               const gchar *name)
3025 {
3026         FolderItem *item;
3027         FolderItem *new_item;
3028
3029         g_return_val_if_fail(folder != NULL, NULL);
3030         g_return_val_if_fail(folder->node != NULL, NULL);
3031         g_return_val_if_fail(folder->node->data != NULL, NULL);
3032         g_return_val_if_fail(folder->account != NULL, NULL);
3033         g_return_val_if_fail(name != NULL, NULL);
3034
3035         item = FOLDER_ITEM(folder->node->data);
3036         new_item = imap_create_folder(folder, item, name);
3037
3038         if (!new_item) {
3039                 g_warning("Can't create '%s'", name);
3040                 if (!folder->inbox) return NULL;
3041
3042                 new_item = imap_create_folder(folder, folder->inbox, name);
3043                 if (!new_item)
3044                         g_warning("Can't create '%s' under INBOX", name);
3045                 else
3046                         new_item->stype = stype;
3047         } else
3048                 new_item->stype = stype;
3049
3050         return new_item;
3051 }
3052
3053 #ifdef G_OS_WIN32
3054 static gchar *imap_encode_unsafe_chars(const gchar *str)
3055 {
3056         gchar *ret = NULL, *o_ret;
3057         gchar *i;
3058         if (!str)
3059                 return NULL;
3060         ret = g_malloc(3*strlen(str)+1);
3061         o_ret = ret;
3062         for (i = (gchar *)str; *i; i++) {
3063                 switch(*i) {
3064                         case ':':
3065                         case '|':
3066                         case '<':
3067                         case '>':
3068                         case '*':
3069                         case '?':
3070                         case '#':
3071                                 *ret++ = '%';
3072                                 *ret++ = '0'+(*i/10);
3073                                 *ret++ = '0'+(*i%10);
3074                                 break;
3075                         default:
3076                                 *ret++ = *i;
3077                 }
3078         }
3079         *ret++ = '\0';
3080         return o_ret;
3081 }
3082 #endif
3083 static gchar *imap_item_get_path(Folder *folder, FolderItem *item)
3084 {
3085         gchar *folder_path, *path;
3086         gchar *item_path = NULL;
3087
3088         g_return_val_if_fail(folder != NULL, NULL);
3089         g_return_val_if_fail(folder->account != NULL, NULL);
3090         g_return_val_if_fail(item != NULL, NULL);
3091         folder_path = prefs_account_cache_dir(folder->account, FALSE);
3092
3093         g_return_val_if_fail(folder_path != NULL, NULL);
3094
3095 #ifdef G_OS_UNIX
3096         item_path = g_strdup(item->path);
3097 #else
3098         item_path = imap_encode_unsafe_chars(item->path);
3099 #endif
3100
3101         if (g_path_is_absolute(folder_path)) {
3102                 if (item_path)
3103                         path = g_strconcat(folder_path, G_DIR_SEPARATOR_S,
3104                                            item_path, NULL);
3105                 else
3106                         path = g_strdup(folder_path);
3107         } else {
3108                 if (item_path)
3109                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
3110                                            folder_path, G_DIR_SEPARATOR_S,
3111                                            item_path, NULL);
3112                 else
3113                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
3114                                            folder_path, NULL);
3115         }
3116         g_free(folder_path);
3117         g_free(item_path);
3118 #ifdef G_OS_WIN32
3119         while (strchr(path, '/'))
3120                 *strchr(path, '/') = '\\';
3121 #endif
3122
3123         return path;
3124 }
3125
3126 static FolderItem *imap_create_folder(Folder *folder, FolderItem *parent,
3127                                const gchar *name)
3128 {
3129         gchar *dirpath, *imap_path;
3130         IMAPSession *session;
3131         FolderItem *new_item;
3132         gchar separator;
3133         gchar *new_name;
3134         const gchar *p;
3135         gint ok = MAILIMAP_NO_ERROR;
3136         gboolean no_select = FALSE, no_sub = FALSE;
3137         gboolean exist = FALSE;
3138
3139         g_return_val_if_fail(folder != NULL, NULL);
3140         g_return_val_if_fail(folder->account != NULL, NULL);
3141         g_return_val_if_fail(parent != NULL, NULL);
3142         g_return_val_if_fail(name != NULL, NULL);
3143
3144         if (to_number(name) > 0) {
3145                 gchar *cached_msg = imap_get_cached_filename(parent, to_number(name));
3146                 if (is_file_exist(cached_msg)) {
3147                         if (claws_unlink(cached_msg) != 0) {
3148                                 return NULL;
3149                         }
3150                 }
3151         }
3152
3153         debug_print("getting session...\n");
3154         session = imap_session_get(folder);
3155         if (!session) {
3156                 return NULL;
3157         }
3158
3159         if (!folder_item_parent(parent) && strcasecmp(name, "INBOX") == 0) {
3160                 dirpath = g_strdup(name);
3161         }else if (parent->path)
3162                 dirpath = g_strconcat(parent->path, "/", name, NULL);
3163         else if ((p = strchr(name, '/')) != NULL && *(p + 1) != '\0')
3164                 dirpath = g_strdup(name);
3165         else if (folder->account->imap_dir && *folder->account->imap_dir) {
3166                 gchar *imap_dir;
3167
3168                 Xstrdup_a(imap_dir, folder->account->imap_dir, {return NULL;});
3169                 strtailchomp(imap_dir, '/');
3170                 dirpath = g_strconcat(imap_dir, "/", name, NULL);
3171         } else
3172                 dirpath = g_strdup(name);
3173
3174
3175
3176         /* keep trailing directory separator to create a folder that contains
3177            sub folder */
3178         imap_path = imap_utf8_to_modified_utf7(dirpath, FALSE);
3179
3180         strtailchomp(dirpath, '/');
3181         Xstrdup_a(new_name, name, {
3182                 g_free(dirpath);
3183                 g_free(imap_path);
3184                 return NULL;});
3185
3186         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), imap_path, &ok);
3187         if (is_fatal(ok)) {
3188                 g_free(imap_path);
3189                 return NULL;
3190         }
3191         imap_path_separator_subst(imap_path, separator);
3192         /* remove trailing / for display */
3193         strtailchomp(new_name, '/');
3194
3195         if (strcasecmp(dirpath, "INBOX") != 0) {
3196                 GPtrArray *argbuf;
3197                 int r;
3198                 clist * lep_list;
3199
3200                 argbuf = g_ptr_array_new();
3201                 r = imap_threaded_list(folder, "", imap_path, &lep_list);
3202                 if (r != MAILIMAP_NO_ERROR) {
3203                         imap_handle_error(SESSION(session), NULL, r);
3204                         log_warning(LOG_PROTOCOL, _("can't create mailbox: LIST failed\n"));
3205                         g_free(imap_path);
3206                         g_free(dirpath);
3207                         ptr_array_free_strings(argbuf);
3208                         g_ptr_array_free(argbuf, TRUE);
3209                         return NULL;
3210                 }
3211
3212                 if (clist_count(lep_list) > 0)
3213                         exist = TRUE;
3214                 mailimap_list_result_free(lep_list);
3215                 lep_list = NULL;
3216                 if (!exist) {
3217                         ok = imap_cmd_create(session, imap_path);
3218                         if (ok != MAILIMAP_NO_ERROR) {
3219                                 log_warning(LOG_PROTOCOL, _("can't create mailbox\n"));
3220                                 g_free(imap_path);
3221                                 g_free(dirpath);
3222                                 return NULL;
3223                         }
3224                         r = imap_threaded_list(folder, "", imap_path, &lep_list);
3225                         if (r == MAILIMAP_NO_ERROR) {
3226                                 GSList *item_list = imap_list_from_lep(IMAP_FOLDER(folder),
3227                                                lep_list, dirpath, TRUE);
3228                                 if (item_list) {
3229                                         FolderItem *cur_item = FOLDER_ITEM(item_list->data);
3230                                         no_select = cur_item->no_select;
3231                                         no_sub = cur_item->no_sub;
3232                                         g_slist_free(item_list);
3233                                 }
3234                                 mailimap_list_result_free(lep_list);
3235                         } else {
3236                                 imap_handle_error(SESSION(session), NULL, r);
3237                         }
3238                 }
3239                 imap_threaded_subscribe(folder, imap_path, TRUE);
3240         } else {
3241                 clist *lep_list;
3242                 int r;
3243                 /* just get flags */
3244                 r = imap_threaded_list(folder, "", "INBOX", &lep_list);
3245                 if (r == MAILIMAP_NO_ERROR) {
3246                         GSList *item_list = imap_list_from_lep(IMAP_FOLDER(folder),
3247                                        lep_list, dirpath, TRUE);
3248                         if (item_list) {
3249                                 FolderItem *cur_item = FOLDER_ITEM(item_list->data);
3250                                 no_select = cur_item->no_select;
3251                                 no_sub = cur_item->no_sub;
3252                                 g_slist_free(item_list);
3253                         }
3254                         mailimap_list_result_free(lep_list);
3255                 } else {
3256                         imap_handle_error(SESSION(session), NULL, r);
3257                 }
3258         }
3259
3260         new_item = folder_item_new(folder, new_name, dirpath);
3261         new_item->no_select = no_select;
3262         new_item->no_sub = no_sub;
3263         folder_item_append(parent, new_item);
3264         g_free(imap_path);
3265         g_free(dirpath);
3266
3267         dirpath = folder_item_get_path(new_item);
3268         if (!is_dir_exist(dirpath))
3269                 make_dir_hier(dirpath);
3270         g_free(dirpath);
3271
3272         if (exist) {
3273                 /* folder existed, scan it */
3274                 imap_scan_required(folder, new_item);
3275                 folder_item_scan_full(new_item, FALSE);
3276         }
3277
3278         return new_item;
3279 }
3280
3281 static gint imap_rename_folder(Folder *folder, FolderItem *item,
3282                                const gchar *name)
3283 {
3284         gchar *dirpath;
3285         gchar *newpath;
3286         gchar *real_oldpath;
3287         gchar *real_newpath;
3288         gchar *paths[2];
3289         gchar *old_cache_dir;
3290         gchar *new_cache_dir;
3291         IMAPSession *session;
3292         gchar separator;
3293         gint ok = MAILIMAP_NO_ERROR;
3294         gint exists, recent, unseen;
3295         guint32 uid_validity;
3296
3297         g_return_val_if_fail(folder != NULL, -1);
3298         g_return_val_if_fail(item != NULL, -1);
3299         g_return_val_if_fail(item->path != NULL, -1);
3300         g_return_val_if_fail(name != NULL, -1);
3301
3302         debug_print("getting session...\n");
3303         session = imap_session_get(folder);
3304         if (!session) {
3305                 return -1;
3306         }
3307
3308         if (strchr(name, imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &ok)) != NULL ||
3309                 is_fatal(ok)) {
3310                 g_warning("New folder name must not contain the namespace "
3311                             "path separator");
3312                 return -1;
3313         }
3314
3315         real_oldpath = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &ok);
3316         if (is_fatal(ok)) {
3317                 g_free(real_oldpath);
3318                 return -1;
3319         }
3320
3321         g_free(session->mbox);
3322         session->mbox = NULL;
3323         session->exists = 0;
3324         session->recent = 0;
3325         session->expunge = 0;
3326         ok = imap_cmd_examine(session, "INBOX",
3327                               &exists, &recent, &unseen, &uid_validity, FALSE);
3328         if (ok != MAILIMAP_NO_ERROR) {
3329                 g_free(real_oldpath);
3330                 return -1;
3331         }
3332
3333         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &ok);
3334         if (is_fatal(ok)) {
3335                 g_free(real_oldpath);
3336                 return -1;
3337         }
3338         if (strchr(item->path, '/')) {
3339                 dirpath = g_path_get_dirname(item->path);
3340                 newpath = g_strconcat(dirpath, "/", name, NULL);
3341                 g_free(dirpath);
3342         } else
3343                 newpath = g_strdup(name);
3344
3345         real_newpath = imap_utf8_to_modified_utf7(newpath, FALSE);
3346         imap_path_separator_subst(real_newpath, separator);
3347
3348         ok = imap_cmd_rename(session, real_oldpath, real_newpath);
3349         if (ok != MAILIMAP_NO_ERROR) {
3350                 log_warning(LOG_PROTOCOL, _("can't rename mailbox: %s to %s\n"),
3351                             real_oldpath, real_newpath);
3352                 g_free(real_oldpath);
3353                 g_free(newpath);
3354                 g_free(real_newpath);
3355                 return -1;
3356         }
3357         g_free(item->name);
3358         item->name = g_strdup(name);
3359
3360         old_cache_dir = folder_item_get_path(item);
3361
3362         paths[0] = g_strdup(item->path);
3363         paths[1] = newpath;
3364         g_node_traverse(item->node, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
3365                         imap_rename_folder_func, paths);
3366
3367         if (is_dir_exist(old_cache_dir)) {
3368                 new_cache_dir = folder_item_get_path(item);
3369                 if (g_rename(old_cache_dir, new_cache_dir) < 0) {
3370                         FILE_OP_ERROR(old_cache_dir, "rename");
3371                 }
3372                 g_free(new_cache_dir);
3373         }
3374
3375         g_free(old_cache_dir);
3376         g_free(paths[0]);
3377         g_free(newpath);
3378         g_free(real_oldpath);
3379         g_free(real_newpath);
3380         return 0;
3381 }
3382
3383 gint imap_subscribe(Folder *folder, FolderItem *item, gchar *rpath, gboolean sub)
3384 {
3385         gchar *path;
3386         gint r = MAILIMAP_NO_ERROR;
3387         IMAPSession *session;
3388         debug_print("getting session...\n");
3389
3390         session = imap_session_get(folder);
3391         if (!session) {
3392                 return -1;
3393         }
3394         if (item && item->path) {
3395                 path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &r);
3396                 if (!path)
3397                         return -1;
3398                 if (is_fatal(r)) {
3399                         g_free(path);
3400                         return -1;
3401                 }
3402                 if (!strcasecmp(path, "INBOX") && sub == FALSE) {
3403                         g_free(path);
3404                         return -1;
3405                 }
3406                 debug_print("%ssubscribing %s\n", sub?"":"un", path);
3407                 r = imap_threaded_subscribe(folder, path, sub);
3408                 g_free(path);
3409         } else if (rpath) {
3410                 r = imap_threaded_subscribe(folder, rpath, sub);
3411         } else
3412                 return -1;
3413         return r;
3414 }
3415
3416 static gint imap_remove_folder_real(Folder *folder, FolderItem *item)
3417 {
3418         gint ok = MAILIMAP_NO_ERROR;
3419         IMAPSession *session;
3420         gchar *path;
3421         gchar *cache_dir;
3422         gboolean selected_folder;
3423
3424         g_return_val_if_fail(folder != NULL, -1);
3425         g_return_val_if_fail(item != NULL, -1);
3426         g_return_val_if_fail(item->path != NULL, -1);
3427
3428         debug_print("getting session...\n");
3429         session = imap_session_get(folder);
3430         if (!session) {
3431                 return -1;
3432         }
3433         path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &ok);
3434         if (is_fatal(ok)) {
3435                 g_free(path);
3436                 return -1;
3437         }
3438         imap_threaded_subscribe(folder, path, FALSE);
3439
3440         selected_folder = (session->mbox != NULL) &&
3441                           (!strcmp(session->mbox, item->path));
3442         if (selected_folder) {
3443                 ok = imap_cmd_close(session);
3444                 if (ok != MAILIMAP_NO_ERROR) {
3445                         debug_print("close err %d\n", ok);
3446                         return ok;
3447                 }
3448         }
3449         ok = imap_cmd_delete(session, path);
3450         if (ok != MAILIMAP_NO_ERROR && !is_fatal(ok)) {
3451                 gchar *tmp = NULL;
3452
3453                 ok = MAILIMAP_NO_ERROR;
3454                 tmp = g_strdup_printf("%s%c", path,
3455                                 imap_get_path_separator(session, IMAP_FOLDER(folder), path, &ok));
3456                 g_free(path);
3457                 path = tmp;
3458                 if (!is_fatal(ok))
3459                         ok = imap_cmd_delete(session, path);
3460         }
3461
3462         if (ok != MAILIMAP_NO_ERROR) {
3463                 log_warning(LOG_PROTOCOL, _("can't delete mailbox\n"));
3464                 g_free(path);
3465                 return -1;
3466         }
3467
3468         g_free(path);
3469         cache_dir = folder_item_get_path(item);
3470         if (is_dir_exist(cache_dir) && remove_dir_recursive(cache_dir) < 0)
3471                 g_warning("can't remove directory '%s'", cache_dir);
3472         g_free(cache_dir);
3473         folder_item_remove(item);
3474         return 0;
3475 }
3476
3477 static gint imap_remove_folder(Folder *folder, FolderItem *item)
3478 {
3479         GNode *node, *next;
3480
3481         g_return_val_if_fail(item != NULL, -1);
3482         g_return_val_if_fail(item->folder != NULL, -1);
3483         g_return_val_if_fail(item->node != NULL, -1);
3484
3485         node = item->node->children;
3486         while (node != NULL) {
3487                 next = node->next;
3488                 if (imap_remove_folder(folder, FOLDER_ITEM(node->data)) < 0)
3489                         return -1;
3490                 node = next;
3491         }
3492         debug_print("IMAP removing %s\n", item->path);
3493
3494         if (imap_remove_all_msg(folder, item) < 0)
3495                 return -1;
3496         return imap_remove_folder_real(folder, item);
3497 }
3498
3499 typedef struct _uncached_data {
3500         IMAPSession *session;
3501         FolderItem *item;
3502         MsgNumberList *numlist;
3503         guint cur;
3504         guint total;
3505         gboolean done;
3506         int ok;
3507 } uncached_data;
3508
3509 static void *imap_get_uncached_messages_thread(void *data)
3510 {
3511         uncached_data *stuff = (uncached_data *)data;
3512         IMAPSession *session = stuff->session;
3513         FolderItem *item = stuff->item;
3514         MsgNumberList *numlist = stuff->numlist;
3515         GSList *newlist = NULL;
3516         GSList *llast = NULL;
3517         GSList *seq_list, *cur;
3518         gboolean got_alien_tags = FALSE;
3519
3520         debug_print("uncached_messages\n");
3521
3522         if (session == NULL || item == NULL || item->folder == NULL
3523             || FOLDER_CLASS(item->folder) != &imap_class) {
3524                 stuff->done = TRUE;
3525                 return NULL;
3526         }
3527
3528         seq_list = imap_get_lep_set_from_numlist(IMAP_FOLDER(item->folder), numlist);
3529         debug_print("get msgs info\n");
3530         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
3531                 struct mailimap_set * imapset;
3532                 unsigned int i;
3533                 int r;
3534                 carray * env_list;
3535                 int count;
3536
3537                 if (session->cancelled)
3538                         break;
3539
3540                 imapset = cur->data;
3541
3542                 r = imap_threaded_fetch_env(session->folder,
3543                                             imapset, &env_list);
3544                 if (r != MAILIMAP_NO_ERROR) {
3545                         imap_handle_error(SESSION(session), NULL, r);
3546                         if (is_fatal(r)) {
3547                                 stuff->ok = r;
3548                                 return NULL;
3549                         }
3550                         continue;
3551                 }
3552
3553                 session_set_access_time(SESSION(session));
3554
3555                 count = 0;
3556                 for(i = 0 ; i < carray_count(env_list) ; i += 2) {
3557                         struct imap_fetch_env_info * info;
3558                         MsgInfo * msginfo;
3559                         GSList *tags = NULL, *cur = NULL;
3560                         info = carray_get(env_list, i);
3561                         tags = carray_get(env_list, i+1);
3562                         msginfo = imap_envelope_from_lep(info, item);
3563                         if (msginfo == NULL) {
3564                                 slist_free_strings_full(tags);
3565                                 continue;
3566                         }
3567                         g_slist_free(msginfo->tags);
3568                         msginfo->tags = NULL;
3569
3570                         for (cur = tags; cur; cur = cur->next) {
3571                                 gchar *real_tag = imap_modified_utf7_to_utf8(cur->data, TRUE);
3572                                 gint id = 0;
3573                                 id = tags_get_id_for_str(real_tag);
3574                                 if (id == -1) {
3575                                         id = tags_add_tag(real_tag);
3576                                         got_alien_tags = TRUE;
3577                                 }
3578                                 if (!g_slist_find(msginfo->tags, GINT_TO_POINTER(id))) {
3579                                         msginfo->tags = g_slist_prepend(
3580                                                         msginfo->tags,
3581                                                         GINT_TO_POINTER(id));
3582                                 }
3583                                 g_free(real_tag);
3584                         }
3585                         if (msginfo->tags)
3586                                 msginfo->tags = g_slist_reverse(msginfo->tags);
3587                         slist_free_strings_full(tags);
3588                         msginfo->folder = item;
3589                         if (!newlist)
3590                                 llast = newlist = g_slist_append(newlist, msginfo);
3591                         else {
3592                                 llast = g_slist_append(llast, msginfo);
3593                                 llast = llast->next;
3594                         }
3595                         count ++;
3596                 }
3597
3598                 imap_fetch_env_free(env_list);
3599         }
3600
3601         if (got_alien_tags) {
3602                 tags_write_tags();
3603                 main_window_reflect_tags_changes(mainwindow_get_mainwindow());
3604         }
3605
3606         imap_lep_set_free(seq_list);
3607
3608         session_set_access_time(SESSION(session));
3609         stuff->done = TRUE;
3610         return newlist;
3611 }
3612
3613 #define MAX_MSG_NUM 50
3614
3615 static GSList *imap_get_uncached_messages(IMAPSession *session,
3616                                         FolderItem *item,
3617                                         MsgNumberList *numlist,
3618                                         int *r)
3619 {
3620         GSList *result = NULL;
3621         GSList * cur;
3622         uncached_data *data = g_new0(uncached_data, 1);
3623
3624         cur = numlist;
3625         data->total = g_slist_length(numlist);
3626         data->ok = MAILIMAP_NO_ERROR;
3627         debug_print("messages list : %i\n", data->total);
3628
3629         while (cur != NULL) {
3630                 GSList * partial_result;
3631                 int count;
3632                 GSList * newlist;
3633                 GSList * llast;
3634
3635                 llast = NULL;
3636                 count = 0;
3637                 newlist = NULL;
3638                 while (count < MAX_MSG_NUM) {
3639                         void * p;
3640
3641                         p = cur->data;
3642
3643                         if (newlist == NULL)
3644                                 llast = newlist = g_slist_append(newlist, p);
3645                         else {
3646                                 llast = g_slist_append(llast, p);
3647                                 llast = llast->next;
3648                         }
3649                         count ++;
3650
3651                         cur = cur->next;
3652                         if (cur == NULL)
3653                                 break;
3654                 }
3655
3656                 data->done = FALSE;
3657                 data->session = session;
3658                 data->item = item;
3659                 data->numlist = newlist;
3660                 data->cur += count;
3661
3662                 if (prefs_common.work_offline &&
3663                     !inc_offline_should_override(FALSE,
3664                         _("Claws Mail needs network access in order "
3665                           "to access the IMAP server."))) {
3666                         g_free(data);
3667                         return NULL;
3668                 }
3669
3670                 partial_result =
3671                         (GSList *)imap_get_uncached_messages_thread(data);
3672                 *r = data->ok;
3673                 if (data->ok != MAILIMAP_NO_ERROR) {
3674                         goto bail;
3675                 }
3676                 statusbar_progress_all(data->cur,data->total, 1);
3677
3678                 g_slist_free(newlist);
3679
3680                 result = g_slist_concat(result, partial_result);
3681         }
3682 bail:
3683         g_free(data);
3684
3685         statusbar_progress_all(0,0,0);
3686         statusbar_pop_all();
3687
3688         return result;
3689 }
3690
3691 static void imap_delete_all_cached_messages(FolderItem *item)
3692 {
3693         gchar *dir;
3694
3695         g_return_if_fail(item != NULL);
3696         g_return_if_fail(item->folder != NULL);
3697         g_return_if_fail(FOLDER_CLASS(item->folder) == &imap_class);
3698
3699         debug_print("Deleting all cached messages...\n");
3700
3701         dir = folder_item_get_path(item);
3702         if (is_dir_exist(dir))
3703                 remove_all_numbered_files(dir);
3704         g_free(dir);
3705
3706         debug_print("Deleting all cached messages done.\n");
3707 }
3708
3709 gchar imap_get_path_separator_for_item(FolderItem *item)
3710 {
3711         Folder *folder = NULL;
3712         IMAPFolder *imap_folder = NULL;
3713         IMAPSession *session = NULL;
3714         gchar result = '/';
3715         gint ok = MAILIMAP_NO_ERROR;
3716         if (!item)
3717                 return '/';
3718         folder = item->folder;
3719
3720         if (!folder)
3721                 return '/';
3722
3723         imap_folder = IMAP_FOLDER(folder);
3724
3725         debug_print("getting session...\n");
3726         session = imap_session_get(FOLDER(folder));
3727         result = imap_get_path_separator(session, imap_folder, item->path, &ok);
3728         return result;
3729 }
3730
3731 static gchar imap_refresh_path_separator(IMAPSession *session, IMAPFolder *folder, const gchar *subfolder, gint *ok)
3732 {
3733         clist * lep_list;
3734         int r;
3735         gchar separator = '\0';
3736
3737         g_return_val_if_fail(session != NULL, '/');
3738         r = imap_threaded_list((Folder *)folder, "", subfolder, &lep_list);
3739
3740         if (r != MAILIMAP_NO_ERROR) {
3741                 imap_handle_error(SESSION(session), NULL, r);
3742                 log_warning(LOG_PROTOCOL, _("LIST failed\n"));
3743                 *ok = r;
3744                 return '\0';
3745         }
3746
3747         if (lep_list != NULL && clist_count(lep_list) > 0) {
3748                 clistiter * iter = clist_begin(lep_list);
3749                 struct mailimap_mailbox_list * mb;
3750                 mb = clist_content(iter);
3751
3752                 separator = mb->mb_delimiter;
3753                 debug_print("got separator: %c\n", folder->last_seen_separator);
3754         }
3755         *ok = MAILIMAP_NO_ERROR;
3756         mailimap_list_result_free(lep_list);
3757         return separator;
3758 }
3759
3760 static gchar imap_get_path_separator(IMAPSession *session, IMAPFolder *folder, const gchar *path, gint *ok)
3761 {
3762         gchar separator = '/';
3763         *ok = MAILIMAP_NO_ERROR;
3764         if (folder->last_seen_separator == 0) {
3765                 folder->last_seen_separator = imap_refresh_path_separator(session, folder, "", ok);
3766         }
3767
3768         if (folder->last_seen_separator == 0) {
3769                 folder->last_seen_separator = imap_refresh_path_separator(session, folder, "INBOX", ok);
3770         }
3771
3772         if (folder->last_seen_separator != 0) {
3773                 debug_print("using separator: %c\n", folder->last_seen_separator);
3774                 return folder->last_seen_separator;
3775         }
3776
3777         return separator;
3778 }
3779
3780 static gchar *imap_get_real_path(IMAPSession *session, IMAPFolder *folder, const gchar *path, gint *ok)
3781 {
3782         gchar *real_path = NULL;
3783         gchar separator;
3784
3785         g_return_val_if_fail(folder != NULL, NULL);
3786         g_return_val_if_fail(path != NULL, NULL);
3787
3788         *ok = MAILIMAP_NO_ERROR;
3789
3790         real_path = imap_utf8_to_modified_utf7(path, FALSE);
3791         separator = imap_get_path_separator(session, folder, path, ok);
3792         if (*ok == MAILIMAP_NO_ERROR)
3793                 imap_path_separator_subst(real_path, separator);
3794
3795         return real_path;
3796 }
3797
3798 static gint imap_set_message_flags(IMAPSession *session,
3799                                    IMAPFolderItem *item,
3800                                    MsgNumberList *numlist,
3801                                    IMAPFlags flags,
3802                                    GSList *tags,
3803                                    gboolean is_set)
3804 {
3805         gint ok = 0;
3806         GSList *seq_list;
3807         GSList * cur;
3808         gint total = 0;
3809         IMAPFolder *folder = NULL;
3810         GSList *sorted_list = NULL;
3811
3812         if (numlist == NULL || session == NULL)
3813                 return MAILIMAP_ERROR_BAD_STATE;
3814
3815         folder = IMAP_FOLDER(session->folder);
3816
3817         sorted_list = g_slist_copy(numlist);
3818         sorted_list = g_slist_sort(sorted_list, g_int_compare);
3819
3820         cur = g_slist_last(sorted_list);
3821
3822         if (cur)
3823                 total = GPOINTER_TO_INT(cur->data);
3824
3825         seq_list = imap_get_lep_set_from_numlist(IMAP_FOLDER(session->folder), sorted_list);
3826
3827         statusbar_print_all(_("Flagging messages..."));
3828
3829         for(cur = seq_list ; cur != NULL ; cur = g_slist_next(cur)) {
3830                 struct mailimap_set * imapset = (struct mailimap_set *)cur->data;
3831                 struct mailimap_set_item *set_item = NULL;
3832
3833                 if (imapset->set_list)
3834                         set_item = clist_content(clist_begin(imapset->set_list));
3835                 else
3836                         continue;
3837
3838                 if (set_item == NULL)
3839                         continue;
3840
3841                 statusbar_progress_all(set_item->set_first, total, 1);
3842
3843                 ok = imap_cmd_store(session, item, imapset,
3844                                     flags, tags, is_set);
3845                 statusbar_progress_all(set_item->set_last, total, 1);
3846                 if (ok != MAILIMAP_NO_ERROR && folder->max_set_size > 20) {
3847                         /* reduce max set size */
3848                         folder->max_set_size /= 2;
3849                 }
3850                 if (ok != MAILIMAP_NO_ERROR && is_fatal(ok)) {
3851                         break;
3852                 }
3853         }
3854
3855         g_slist_free(sorted_list);
3856
3857         statusbar_progress_all(0,0,0);
3858         statusbar_pop_all();
3859
3860         imap_lep_set_free(seq_list);
3861
3862         return ok;
3863 }
3864
3865 typedef struct _select_data {
3866         IMAPSession *session;
3867         gchar *real_path;
3868         gint *exists;
3869         gint *recent;
3870         gint *unseen;
3871         guint32 *uid_validity;
3872         gboolean done;
3873 } select_data;
3874
3875 static gint imap_select(IMAPSession *session, IMAPFolder *folder,
3876                         FolderItem *item,
3877                         gint *exists, gint *recent, gint *unseen,
3878                         guint32 *uid_validity, gint *can_create_flags,
3879                         gboolean block)
3880 {
3881         gchar *real_path;
3882         gint ok = MAILIMAP_NO_ERROR;
3883         gint exists_, recent_, unseen_;
3884         guint32 uid_validity_;
3885         gint can_create_flags_;
3886         const gchar *path = item ? item->path:NULL;
3887
3888         if (!item) {
3889                 return MAILIMAP_ERROR_BAD_STATE;
3890         }
3891
3892         if (!exists && !recent && !unseen && !uid_validity && !can_create_flags) {
3893                 if (session->mbox && strcmp(session->mbox, path) == 0)
3894                         return MAILIMAP_NO_ERROR;
3895         }
3896         if (!exists && !recent && !unseen && !uid_validity && can_create_flags) {
3897                 if (session->mbox && strcmp(session->mbox, path) == 0) {
3898                         if (IMAP_FOLDER_ITEM(item)->can_create_flags != ITEM_CAN_CREATE_FLAGS_UNKNOWN)
3899                                 return MAILIMAP_NO_ERROR;
3900                 }
3901         }
3902         if (!exists)
3903                 exists = &exists_;
3904         if (!recent)
3905                 recent = &recent_;
3906         if (!unseen)
3907                 unseen = &unseen_;
3908         if (!uid_validity)
3909                 uid_validity = &uid_validity_;
3910         if (!can_create_flags)
3911                 can_create_flags = &can_create_flags_;
3912
3913         g_free(session->mbox);
3914         session->mbox = NULL;
3915         session->exists = 0;
3916         session->recent = 0;
3917         session->expunge = 0;
3918
3919         real_path = imap_get_real_path(session, folder, path, &ok);
3920         if (is_fatal(ok)) {
3921                 g_free(real_path);
3922                 return ok;
3923         }
3924         g_slist_free(IMAP_FOLDER_ITEM(item)->ok_flags);
3925         IMAP_FOLDER_ITEM(item)->ok_flags = NULL;
3926         ok = imap_cmd_select(session, real_path,
3927                              exists, recent, unseen, uid_validity, can_create_flags,
3928                              &(IMAP_FOLDER_ITEM(item)->ok_flags), block);
3929         if (ok != MAILIMAP_NO_ERROR) {
3930                 log_warning(LOG_PROTOCOL, _("can't select folder: %s\n"), real_path);
3931         } else {
3932                 session->mbox = g_strdup(path);
3933                 session->folder_content_changed = FALSE;
3934                 session->exists = *exists;
3935                 session->recent = *recent;
3936                 session->expunge = 0;
3937                 session->unseen = *unseen;
3938                 session->uid_validity = *uid_validity;
3939                 debug_print("select: exists %d recent %d expunge %d uid_validity %d can_create_flags %d\n",
3940                         session->exists, session->recent, session->expunge,
3941                         session->uid_validity, *can_create_flags);
3942         }
3943         if (*can_create_flags) {
3944                 IMAP_FOLDER_ITEM(item)->can_create_flags = ITEM_CAN_CREATE_FLAGS;
3945         } else {
3946                 IMAP_FOLDER_ITEM(item)->can_create_flags = ITEM_CANNOT_CREATE_FLAGS;
3947         }
3948         g_free(real_path);
3949
3950         return ok;
3951 }
3952
3953 static gint imap_status(IMAPSession *session, IMAPFolder *folder,
3954                         const gchar *path, IMAPFolderItem *item,
3955                         gint *messages,
3956                         guint32 *uid_next, guint32 *uid_validity,
3957                         gint *unseen, gboolean block)
3958 {
3959         int r = MAILIMAP_NO_ERROR;
3960         clistiter * iter;
3961         struct mailimap_mailbox_data_status * data_status;
3962         int got_values;
3963         gchar *real_path;
3964         guint mask = 0;
3965
3966         real_path = imap_get_real_path(session, folder, path, &r);
3967         if (is_fatal(r)) {
3968                 g_free(real_path);
3969                 return r;
3970         }
3971         if (messages) {
3972                 mask |= 1 << 0;
3973                 *messages = 0;
3974         }
3975         if (uid_next) {
3976                 mask |= 1 << 2;
3977                 *uid_next = 0;
3978         }
3979         if (uid_validity) {
3980                 mask |= 1 << 3;
3981                 *uid_validity = 0;
3982         }
3983         if (unseen) {
3984                 mask |= 1 << 4;
3985                 *unseen = 0;
3986         }
3987
3988         if (session->mbox != NULL &&
3989             !strcmp(session->mbox, item->item.path)) {
3990                 r = imap_cmd_close(session);
3991                 if (r != MAILIMAP_NO_ERROR) {
3992                         debug_print("close err %d\n", r);
3993                         g_free(real_path);
3994                         return r;
3995                 }
3996         }
3997
3998         r = imap_threaded_status(FOLDER(folder), real_path,
3999                 &data_status, mask);
4000
4001         g_free(real_path);
4002         if (r != MAILIMAP_NO_ERROR) {
4003                 imap_handle_error(SESSION(session), NULL, r);
4004                 debug_print("status err %d\n", r);
4005                 return r;
4006         }
4007
4008         if (data_status == NULL || data_status->st_info_list == NULL) {
4009                 debug_print("data_status %p\n", data_status);
4010                 if (data_status) {
4011                         debug_print("data_status->st_info_list %p\n", data_status->st_info_list);
4012                         mailimap_mailbox_data_status_free(data_status);
4013                 }
4014                 return MAILIMAP_ERROR_BAD_STATE;
4015         }
4016
4017         got_values = 0;
4018         if (data_status->st_info_list) {
4019                 for(iter = clist_begin(data_status->st_info_list) ; iter != NULL ;
4020                     iter = clist_next(iter)) {
4021                         struct mailimap_status_info * info;
4022
4023                         info = clist_content(iter);
4024                         switch (info->st_att) {
4025                         case MAILIMAP_STATUS_ATT_MESSAGES:
4026                                 if (messages) {
4027                                         * messages = info->st_value;
4028                                         got_values |= 1 << 0;
4029                                 }
4030                                 break;
4031
4032                         case MAILIMAP_STATUS_ATT_UIDNEXT:
4033                                 if (uid_next) {
4034                                         * uid_next = info->st_value;
4035                                         got_values |= 1 << 2;
4036                                 }
4037                                 break;
4038
4039                         case MAILIMAP_STATUS_ATT_UIDVALIDITY:
4040                                 if (uid_validity) {
4041                                         * uid_validity = info->st_value;
4042                                         got_values |= 1 << 3;
4043                                 }
4044                                 break;
4045
4046                         case MAILIMAP_STATUS_ATT_UNSEEN:
4047                                 if (unseen) {
4048                                         * unseen = info->st_value;
4049                                         got_values |= 1 << 4;
4050                                 }
4051                                 break;
4052                         }
4053                 }
4054         }
4055         mailimap_mailbox_data_status_free(data_status);
4056
4057         if (got_values != mask) {
4058                 g_warning("status: incomplete values received (%d)", got_values);
4059         }
4060         return MAILIMAP_NO_ERROR;
4061 }
4062
4063 static void imap_free_capabilities(IMAPSession *session)
4064 {
4065         slist_free_strings_full(session->capability);
4066         session->capability = NULL;
4067 }
4068
4069 /* low-level IMAP4rev1 commands */
4070
4071 static gint imap_cmd_login(IMAPSession *session,
4072                            const gchar *user, const gchar *pass,
4073                            const gchar *type)
4074 {
4075         int r;
4076         gint ok;
4077
4078         if (!strcmp(type, "plaintext") && imap_has_capability(session, "LOGINDISABLED")) {
4079                 gint ok = MAILIMAP_ERROR_BAD_STATE;
4080                 if (imap_has_capability(session, "STARTTLS")) {
4081 #ifdef USE_GNUTLS
4082                         log_warning(LOG_PROTOCOL, _("Server requires STARTTLS to log in.\n"));
4083                         ok = imap_cmd_starttls(session);
4084                         if (ok != MAILIMAP_NO_ERROR) {
4085                                 log_warning(LOG_PROTOCOL, _("Can't start STARTTLS session.\n"));
4086                                 return ok;
4087                         } else {
4088                                 /* refresh capas */
4089                                 imap_free_capabilities(session);
4090                                 if ((r = imap_get_capabilities(session)) != MAILIMAP_NO_ERROR) {
4091                                         imap_handle_error(SESSION(session), NULL, r);
4092                                         log_warning(LOG_PROTOCOL, _("Can't refresh capabilities.\n"));
4093                                         return r;
4094                                 }
4095                         }
4096 #else
4097                         log_error(LOG_PROTOCOL, _("Connection to %s failed: "
4098                                         "server requires STARTTLS, but Claws Mail "
4099                                         "has been compiled without STARTTLS "
4100                                         "support.\n"),
4101                                         SESSION(session)->server);
4102                         return MAILIMAP_ERROR_LOGIN;
4103 #endif
4104                 } else {
4105                         log_error(LOG_PROTOCOL, _("Server logins are disabled.\n"));
4106                         return MAILIMAP_ERROR_LOGIN;
4107                 }
4108         }
4109
4110         log_print(LOG_PROTOCOL, "IMAP> Logging %s to %s using %s\n",
4111                         user,
4112                         SESSION(session)->server,
4113                         type);
4114         r = imap_threaded_login(session->folder, user, pass, type);
4115         if (r != MAILIMAP_NO_ERROR) {
4116                 imap_handle_error(SESSION(session), NULL, r);
4117                 log_print(LOG_PROTOCOL, "IMAP< Error logging in to %s\n",
4118                                 SESSION(session)->server);
4119                 ok = r;
4120         } else {
4121                 log_print(LOG_PROTOCOL, "IMAP< Login to %s successful\n",
4122                                 SESSION(session)->server);
4123                 ok = MAILIMAP_NO_ERROR;
4124         }
4125         return ok;
4126 }
4127
4128 static gint imap_cmd_noop(IMAPSession *session)
4129 {
4130         int r;
4131         unsigned int exists, recent, expunge, unseen, uidnext, uidval;
4132
4133         r = imap_threaded_noop(session->folder, &exists, &recent, &expunge, &unseen, &uidnext, &uidval);
4134         if (r != MAILIMAP_NO_ERROR) {
4135                 imap_handle_error(SESSION(session), NULL, r);
4136                 debug_print("noop err %d\n", r);
4137                 return r;
4138         }
4139
4140         if ((exists && exists != session->exists)
4141          || (recent && recent != session->recent)
4142          || (expunge && expunge != session->expunge)
4143          || (unseen && unseen != session->unseen)) {
4144                 session->folder_content_changed = TRUE;
4145         }
4146         if (uidnext != 0 && uidnext != session->uid_next) {
4147                 session->uid_next = uidnext;
4148                 session->folder_content_changed = TRUE;
4149         }
4150         if (uidval != 0 && uidval != session->uid_validity) {
4151                 session->uid_validity = uidval;
4152                 session->folder_content_changed = TRUE;
4153         }
4154
4155         session->exists = exists;
4156         session->recent = recent;
4157         session->expunge = expunge;
4158         session->unseen = unseen;
4159
4160         session_set_access_time(SESSION(session));
4161
4162         return MAILIMAP_NO_ERROR;
4163 }
4164
4165 #ifdef USE_GNUTLS
4166 static gint imap_cmd_starttls(IMAPSession *session)
4167 {
4168         int r;
4169
4170         r = imap_threaded_starttls(session->folder,
4171                 SESSION(session)->server, SESSION(session)->port);
4172         if (r != MAILIMAP_NO_ERROR) {
4173                 imap_handle_error(SESSION(session), NULL, r);
4174                 debug_print("STARTTLS err %d\n", r);
4175                 return r;
4176         }
4177         return MAILIMAP_NO_ERROR;
4178 }
4179 #endif
4180
4181 static gint imap_cmd_select(IMAPSession *session, const gchar *folder,
4182                             gint *exists, gint *recent, gint *unseen,
4183                             guint32 *uid_validity, gint *can_create_flags,
4184                             GSList **ok_flags, gboolean block)
4185 {
4186         int r;
4187
4188         r = imap_threaded_select(session->folder, folder,
4189                                  exists, recent, unseen, uid_validity, can_create_flags, ok_flags);
4190         if (r != MAILIMAP_NO_ERROR) {
4191                 imap_handle_error(SESSION(session), NULL, r);
4192                 debug_print("select err %d\n", r);
4193                 return r;
4194         }
4195         return MAILIMAP_NO_ERROR;
4196 }
4197
4198 static gint imap_cmd_close(IMAPSession *session)
4199 {
4200         int r;
4201
4202         r = imap_threaded_close(session->folder);
4203         if (r != MAILIMAP_NO_ERROR) {
4204                 imap_handle_error(SESSION(session), NULL, r);
4205                 debug_print("close err %d\n", r);
4206                 return r;
4207         }
4208         g_free(session->mbox);
4209         session->mbox = NULL;
4210         session->exists = 0;
4211         session->recent = 0;
4212         session->expunge = 0;
4213         return MAILIMAP_NO_ERROR;
4214 }
4215
4216 static gint imap_cmd_examine(IMAPSession *session, const gchar *folder,
4217                              gint *exists, gint *recent, gint *unseen,
4218                              guint32 *uid_validity, gboolean block)
4219 {
4220         int r;
4221
4222         r = imap_threaded_examine(session->folder, folder,
4223                                   exists, recent, unseen, uid_validity);
4224         if (r != MAILIMAP_NO_ERROR) {
4225                 imap_handle_error(SESSION(session), NULL, r);
4226                 debug_print("examine err %d\n", r);
4227
4228                 return r;
4229         }
4230         return MAILIMAP_NO_ERROR;
4231 }
4232
4233 static gint imap_cmd_create(IMAPSession *session, const gchar *folder)
4234 {
4235         int r;
4236
4237         r = imap_threaded_create(session->folder, folder);
4238         if (r != MAILIMAP_NO_ERROR) {
4239                 imap_handle_error(SESSION(session), NULL, r);
4240                 return r;
4241         }
4242
4243         return MAILIMAP_NO_ERROR;
4244 }
4245
4246 static gint imap_cmd_rename(IMAPSession *session, const gchar *old_folder,
4247                             const gchar *new_folder)
4248 {
4249         int r;
4250
4251         r = imap_threaded_rename(session->folder, old_folder,
4252                                  new_folder);
4253         if (r != MAILIMAP_NO_ERROR) {
4254                 imap_handle_error(SESSION(session), NULL, r);
4255                 return r;
4256         }
4257
4258         return MAILIMAP_NO_ERROR;
4259 }
4260
4261 static gint imap_cmd_delete(IMAPSession *session, const gchar *folder)
4262 {
4263         int r;
4264
4265
4266         r = imap_threaded_delete(session->folder, folder);
4267         if (r != MAILIMAP_NO_ERROR) {
4268                 imap_handle_error(SESSION(session), NULL, r);
4269                 return r;
4270         }
4271
4272         return MAILIMAP_NO_ERROR;
4273 }
4274
4275 typedef struct _fetch_data {
4276         IMAPSession *session;
4277         guint32 uid;
4278         const gchar *filename;
4279         gboolean headers;
4280         gboolean body;
4281         gboolean done;
4282 } fetch_data;
4283
4284 static void *imap_cmd_fetch_thread(void *data)
4285 {
4286         fetch_data *stuff = (fetch_data *)data;
4287         IMAPSession *session = stuff->session;
4288         guint32 uid = stuff->uid;
4289         const gchar *filename = stuff->filename;
4290         int r;
4291
4292         if (stuff->body) {
4293                 r = imap_threaded_fetch_content(session->folder,
4294                                                uid, 1, filename);
4295         }
4296         else {
4297                 r = imap_threaded_fetch_content(session->folder,
4298                                                 uid, 0, filename);
4299         }
4300         if (r != MAILIMAP_NO_ERROR) {
4301                 imap_handle_error(SESSION(session), NULL, r);
4302                 debug_print("fetch err %d\n", r);
4303                 return GINT_TO_POINTER(r);
4304         }
4305         return GINT_TO_POINTER(MAILIMAP_NO_ERROR);
4306 }
4307
4308 static gint imap_cmd_fetch(IMAPSession *session, guint32 uid,
4309                                 const gchar *filename, gboolean headers,
4310                                 gboolean body)
4311 {
4312         fetch_data *data = g_new0(fetch_data, 1);
4313         int result = 0;
4314         data->done = FALSE;
4315         data->session = session;
4316         data->uid = uid;
4317         data->filename = filename;
4318         data->headers = headers;
4319         data->body = body;
4320
4321         if (prefs_common.work_offline &&
4322             !inc_offline_should_override(FALSE,
4323                 _("Claws Mail needs network access in order "
4324                   "to access the IMAP server."))) {
4325                 g_free(data);
4326                 return -1;
4327         }
4328         statusbar_print_all(_("Fetching message..."));
4329         result = GPOINTER_TO_INT(imap_cmd_fetch_thread(data));
4330         statusbar_pop_all();
4331         g_free(data);
4332         return result;
4333 }
4334
4335
4336 static gint imap_cmd_append(IMAPSession *session,
4337                             IMAPFolderItem *item,
4338                             const gchar *destfolder,
4339                             const gchar *file, IMAPFlags flags,
4340                             guint32 *new_uid)
4341 {
4342         struct mailimap_flag_list * flag_list;
4343         int r;
4344
4345         cm_return_val_if_fail(file != NULL, MAILIMAP_ERROR_BAD_STATE);
4346
4347         flag_list = imap_flag_to_lep(item, flags, NULL);
4348         lock_session(session);
4349         r = imap_threaded_append(session->folder, destfolder,
4350                          file, flag_list, (int *)new_uid);
4351         mailimap_flag_list_free(flag_list);
4352
4353         if (r != MAILIMAP_NO_ERROR) {
4354                 imap_handle_error(SESSION(session), NULL, r);
4355                 debug_print("append err %d\n", r);
4356                 return r;
4357         }
4358
4359         unlock_session(session);
4360
4361         return MAILIMAP_NO_ERROR;
4362 }
4363
4364 static gint imap_cmd_copy(IMAPSession *session, struct mailimap_set * set,
4365                           const gchar *destfolder,
4366                           struct mailimap_set **source, struct mailimap_set **dest)
4367 {
4368         int r;
4369
4370         g_return_val_if_fail(session != NULL, MAILIMAP_ERROR_BAD_STATE);
4371         g_return_val_if_fail(set != NULL, MAILIMAP_ERROR_BAD_STATE);
4372         g_return_val_if_fail(destfolder != NULL, MAILIMAP_ERROR_BAD_STATE);
4373
4374         r = imap_threaded_copy(session->folder, set, destfolder, source, dest);
4375         if (r != MAILIMAP_NO_ERROR) {
4376                 imap_handle_error(SESSION(session), NULL, r);
4377                 return r;
4378         }
4379
4380         return MAILIMAP_NO_ERROR;
4381 }
4382
4383 static gint imap_cmd_store(IMAPSession *session,
4384                            IMAPFolderItem *item,
4385                            struct mailimap_set * set,
4386                            IMAPFlags flags, GSList *tags, int do_add)
4387 {
4388         int r;
4389         struct mailimap_flag_list * flag_list = NULL;
4390         struct mailimap_store_att_flags * store_att_flags;
4391
4392         flag_list = imap_flag_to_lep(item, flags, tags);
4393
4394         if (do_add)
4395                 store_att_flags =
4396                         mailimap_store_att_flags_new_add_flags_silent(flag_list);
4397         else
4398                 store_att_flags =
4399                         mailimap_store_att_flags_new_remove_flags_silent(flag_list);
4400
4401         r = imap_threaded_store(session->folder, set, store_att_flags);
4402         mailimap_store_att_flags_free(store_att_flags);
4403         if (r != MAILIMAP_NO_ERROR) {
4404                 imap_handle_error(SESSION(session), NULL, r);
4405                 return r;
4406         }
4407
4408         return MAILIMAP_NO_ERROR;
4409 }
4410
4411 static gint imap_cmd_expunge(IMAPSession *session)
4412 {
4413         int r;
4414
4415         if (prefs_common.work_offline &&
4416             !inc_offline_should_override(FALSE,
4417                 _("Claws Mail needs network access in order "
4418                   "to access the IMAP server."))) {
4419                 return -1;
4420         }
4421
4422         r = imap_threaded_expunge(session->folder);
4423         if (r != MAILIMAP_NO_ERROR) {
4424                 imap_handle_error(SESSION(session), NULL, r);
4425                 return r;
4426         }
4427
4428         return MAILIMAP_NO_ERROR;
4429 }
4430
4431 gint imap_expunge(Folder *folder, FolderItem *item)
4432 {
4433         IMAPSession *session = imap_session_get(folder);
4434         if (session == NULL)
4435                 return -1;
4436
4437         return imap_cmd_expunge(session);
4438 }
4439
4440 static void imap_path_separator_subst(gchar *str, gchar separator)
4441 {
4442         gchar *p;
4443         gboolean in_escape = FALSE;
4444
4445         if (!separator || separator == '/') return;
4446
4447         for (p = str; *p != '\0'; p++) {
4448                 if (*p == '/' && !in_escape)
4449                         *p = separator;
4450                 else if (*p == '&' && *(p + 1) != '-' && !in_escape)
4451                         in_escape = TRUE;
4452                 else if (*p == '-' && in_escape)
4453                         in_escape = FALSE;
4454         }
4455 }
4456
4457 static gboolean imap_rename_folder_func(GNode *node, gpointer data)
4458 {
4459         FolderItem *item = node->data;
4460         gchar **paths = data;
4461         const gchar *oldpath = paths[0];
4462         const gchar *newpath = paths[1];
4463         gchar *real_oldpath, *real_newpath;
4464         gchar *base;
4465         gchar *new_itempath;
4466         gint oldpathlen;
4467         IMAPSession *session = imap_session_get(item->folder);
4468         gint ok = MAILIMAP_NO_ERROR;
4469         oldpathlen = strlen(oldpath);
4470         if (strncmp(oldpath, item->path, oldpathlen) != 0) {
4471                 g_warning("path doesn't match: %s, %s", oldpath, item->path);
4472                 return TRUE;
4473         }
4474
4475         base = item->path + oldpathlen;
4476         while (*base == '/') base++;
4477         if (*base == '\0')
4478                 new_itempath = g_strdup(newpath);
4479         else
4480                 new_itempath = g_strconcat(newpath, "/", base,
4481                                            NULL);
4482
4483         real_oldpath = imap_get_real_path(session, IMAP_FOLDER(item->folder), item->path, &ok);
4484         g_free(item->path);
4485         item->path = new_itempath;
4486
4487         real_newpath = imap_get_real_path(session, IMAP_FOLDER(item->folder), item->path, &ok);
4488
4489         imap_threaded_subscribe(item->folder, real_oldpath, FALSE);
4490         imap_threaded_subscribe(item->folder, real_newpath, TRUE);
4491
4492         g_free(real_oldpath);
4493         g_free(real_newpath);
4494         return FALSE;
4495 }
4496
4497 static gint get_list_of_uids(IMAPSession *session, Folder *folder, IMAPFolderItem *item, GSList **msgnum_list)
4498 {
4499         GSList *uidlist, *elem;
4500         int r = -1;
4501         clist * lep_uidlist;
4502         gint ok, nummsgs = 0;
4503
4504         if (session == NULL) {
4505                 return -1;
4506         }
4507
4508         ok = imap_select(session, IMAP_FOLDER(folder), FOLDER_ITEM(item),
4509                          NULL, NULL, NULL, NULL, NULL, TRUE);
4510         if (ok != MAILIMAP_NO_ERROR) {
4511                 return -1;
4512         }
4513
4514         g_slist_free(item->uid_list);
4515         item->uid_list = NULL;
4516
4517         uidlist = NULL;
4518
4519         if (folder->account && folder->account->low_bandwidth) {
4520                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SIMPLE,
4521                                 NULL, NULL, NULL, &lep_uidlist);
4522         }
4523
4524         if (r == MAILIMAP_NO_ERROR) {
4525                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
4526                 mailimap_search_result_free(lep_uidlist);
4527         } else {
4528                 carray * lep_uidtab;
4529                 if (r != -1) { /* inited */
4530                         imap_handle_error(SESSION(session), NULL, r);
4531                         if (is_fatal(r))
4532                                 return -1;
4533                 }
4534                 r = imap_threaded_fetch_uid(folder, 1,
4535                                     &lep_uidtab);
4536                 if (r == MAILIMAP_NO_ERROR) {
4537                         uidlist = imap_uid_list_from_lep_tab(lep_uidtab);
4538                         imap_fetch_uid_list_free(lep_uidtab);
4539                 }
4540         }
4541
4542         if (r != MAILIMAP_NO_ERROR) {
4543                 imap_handle_error(SESSION(session), NULL, r);
4544                 return -1;
4545         }
4546
4547         for (elem = uidlist; elem != NULL; elem = g_slist_next(elem)) {
4548                 guint msgnum;
4549
4550                 msgnum = GPOINTER_TO_INT(elem->data);
4551
4552                 *msgnum_list = g_slist_prepend(*msgnum_list, GINT_TO_POINTER(msgnum));
4553                 item->uid_list = g_slist_prepend(item->uid_list, GINT_TO_POINTER(msgnum));
4554                 nummsgs++;
4555         }
4556         g_slist_free(uidlist);
4557
4558         return nummsgs;
4559
4560 }
4561
4562 gint imap_get_num_list(Folder *folder, FolderItem *_item, GSList **msgnum_list, gboolean *old_uids_valid)
4563 {
4564         IMAPFolderItem *item = (IMAPFolderItem *)_item;
4565         IMAPSession *session;
4566         gint nummsgs;
4567         GSList *uidlist = NULL;
4568         gchar *dir;
4569         gint known_list_len = 0;
4570         gchar *path;
4571
4572         debug_print("get_num_list\n");
4573
4574         g_return_val_if_fail(folder != NULL, -1);
4575         g_return_val_if_fail(item != NULL, -1);
4576         g_return_val_if_fail(item->item.path != NULL, -1);
4577         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
4578         g_return_val_if_fail(folder->account != NULL, -1);
4579
4580         known_list_len = g_slist_length(item->uid_list);
4581         if (!item->should_update) {
4582                 debug_print("get_num_list: nothing to update\n");
4583                 *old_uids_valid = TRUE;
4584                 if (known_list_len == item->item.total_msgs
4585                  && known_list_len > 0) {
4586                         *msgnum_list = g_slist_copy(item->uid_list);
4587                         return known_list_len;
4588                 } else {
4589                         debug_print("don't know the list length...\n");
4590                 }
4591         }
4592
4593         if (prefs_common.work_offline &&
4594             !inc_offline_should_override(FALSE,
4595                 _("Claws Mail needs network access in order "
4596                   "to access the IMAP server."))) {
4597                 return -1;
4598         }
4599
4600         path = folder_item_get_path(_item);
4601         if (!is_dir_exist(path)) {
4602                 if(is_file_exist(path))
4603                         claws_unlink(path);
4604                 make_dir_hier(path);
4605         }
4606         g_free(path);
4607
4608         debug_print("getting session...\n");
4609         session = imap_session_get(folder);
4610         g_return_val_if_fail(session != NULL, -1);
4611
4612         lock_session(session);
4613         if (FOLDER_ITEM(item)->path)
4614                 statusbar_print_all(_("Scanning folder %s/%s..."),
4615                                       FOLDER_ITEM(item)->folder->name,
4616                                       FOLDER_ITEM(item)->path);
4617         else
4618                 statusbar_print_all(_("Scanning folder %s..."),
4619                                       FOLDER_ITEM(item)->folder->name);
4620
4621         if (item->should_trash_cache) {
4622                 *old_uids_valid = FALSE;
4623                 debug_print("get_num_list: trashing num list\n");
4624                 debug_print("Freeing imap uid cache\n");
4625                 item->lastuid = 0;
4626                 g_slist_free(item->uid_list);
4627                 item->uid_list = NULL;
4628
4629                 imap_delete_all_cached_messages((FolderItem *)item);
4630         } else {
4631                 debug_print("get_num_list: updating num list\n");
4632                 *old_uids_valid = TRUE;
4633         }
4634
4635         nummsgs = get_list_of_uids(session, folder, item, &uidlist);
4636
4637         unlock_session(session);
4638
4639         /* session could be broken now, in case of fatal error */
4640
4641         debug_print("get_num_list: got %d msgs\n", nummsgs);
4642
4643         if (nummsgs < 0) {
4644                 statusbar_pop_all();
4645                 return -1;
4646         }
4647
4648         *msgnum_list = uidlist;
4649
4650         dir = folder_item_get_path((FolderItem *)item);
4651         debug_print("removing old messages from %s\n", dir);
4652         remove_numbered_files_not_in_list(dir, *msgnum_list);
4653         g_free(dir);
4654
4655         debug_print("get_num_list - ok - %i\n", nummsgs);
4656         statusbar_pop_all();
4657         item->should_trash_cache = FALSE;
4658         item->should_update = FALSE;
4659         return nummsgs;
4660 }
4661
4662 static MsgInfo *imap_parse_msg(const gchar *file, FolderItem *item)
4663 {
4664         MsgInfo *msginfo;
4665         MsgFlags flags;
4666
4667         flags.perm_flags = MSG_NEW|MSG_UNREAD;
4668         flags.tmp_flags = 0;
4669
4670         g_return_val_if_fail(item != NULL, NULL);
4671         g_return_val_if_fail(file != NULL, NULL);
4672
4673         if (folder_has_parent_of_type(item, F_QUEUE)) {
4674                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
4675         } else if (folder_has_parent_of_type(item, F_DRAFT)) {
4676                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
4677         }
4678
4679         msginfo = procheader_parse_file(file, flags, FALSE, FALSE);
4680         if (!msginfo) return NULL;
4681
4682         msginfo->plaintext_file = g_strdup(file);
4683         msginfo->folder = item;
4684
4685         return msginfo;
4686 }
4687
4688 GSList *imap_get_msginfos(Folder *folder, FolderItem *item,
4689                           GSList *msgnum_list)
4690 {
4691         IMAPSession *session;
4692         MsgInfoList *ret = NULL;
4693         gint ok;
4694
4695         debug_print("get_msginfos\n");
4696
4697         g_return_val_if_fail(folder != NULL, NULL);
4698         g_return_val_if_fail(item != NULL, NULL);
4699         g_return_val_if_fail(msgnum_list != NULL, NULL);
4700
4701         debug_print("getting session...\n");
4702         session = imap_session_get(folder);
4703         g_return_val_if_fail(session != NULL, NULL);
4704
4705         lock_session(session); /* unlocked later in the function */
4706
4707         debug_print("IMAP getting msginfos\n");
4708         ok = imap_select(session, IMAP_FOLDER(folder), item,
4709                          NULL, NULL, NULL, NULL, NULL, FALSE);
4710         if (ok != MAILIMAP_NO_ERROR) {
4711                 return NULL;
4712         }
4713         if (!(folder_has_parent_of_type(item, F_DRAFT) ||
4714               folder_has_parent_of_type(item, F_QUEUE))) {
4715                 ret = g_slist_concat(ret,
4716                         imap_get_uncached_messages(session, item,
4717                                                    msgnum_list, &ok));
4718                 if (ok != MAILIMAP_NO_ERROR)
4719                         return NULL;
4720                 unlock_session(session);
4721         } else {
4722                 MsgNumberList *sorted_list, *elem, *llast = NULL;
4723                 gint startnum, lastnum;
4724
4725                 unlock_session(session);
4726
4727                 sorted_list = g_slist_sort(g_slist_copy(msgnum_list), g_int_compare);
4728
4729                 startnum = lastnum = GPOINTER_TO_INT(sorted_list->data);
4730
4731                 llast = g_slist_last(ret);
4732                 for (elem = sorted_list;; elem = g_slist_next(elem)) {
4733                         guint num = 0;
4734
4735                         if (elem)
4736                                 num = GPOINTER_TO_INT(elem->data);
4737
4738                         if (num > lastnum + 1 || elem == NULL) {
4739                                 int i;
4740                                 for (i = startnum; i <= lastnum; ++i) {
4741                                         gchar *file;
4742                                         file = imap_fetch_msg(folder, item, i);
4743                                         if (file != NULL) {
4744                                                 MsgInfo *msginfo = imap_parse_msg(file, item);
4745                                                 if (msginfo != NULL) {
4746                                                         msginfo->msgnum = i;
4747                                                         if (llast == NULL)
4748                                                                 llast = ret = g_slist_append(ret, msginfo);
4749                                                         else {
4750                                                                 llast = g_slist_append(llast, msginfo);
4751                                                                 llast = llast->next;
4752                                                         }
4753                                                 }
4754                                                 g_free(file);
4755                                         }
4756                                 }
4757
4758                                 if (elem == NULL)
4759                                         break;
4760
4761                                 startnum = num;
4762                         }
4763                         lastnum = num;
4764                 }
4765
4766                 g_slist_free(sorted_list);
4767         }
4768         return ret;
4769 }
4770
4771 MsgInfo *imap_get_msginfo(Folder *folder, FolderItem *item, gint uid)
4772 {
4773         MsgInfo *msginfo = NULL;
4774         MsgInfoList *msginfolist;
4775         MsgNumberList numlist;
4776
4777         numlist.next = NULL;
4778         numlist.data = GINT_TO_POINTER(uid);
4779
4780         msginfolist = imap_get_msginfos(folder, item, &numlist);
4781         if (msginfolist != NULL) {
4782                 msginfo = msginfolist->data;
4783                 g_slist_free(msginfolist);
4784         }
4785
4786         return msginfo;
4787 }
4788
4789 gboolean imap_scan_required(Folder *folder, FolderItem *_item)
4790 {
4791         IMAPSession *session;
4792         IMAPFolderItem *item = (IMAPFolderItem *)_item;
4793         gint ok, exists = 0, unseen = 0;
4794         guint32 uid_next = 0, uid_val = 0;
4795         gboolean selected_folder;
4796
4797         g_return_val_if_fail(folder != NULL, FALSE);
4798         g_return_val_if_fail(item != NULL, FALSE);
4799         g_return_val_if_fail(item->item.folder != NULL, FALSE);
4800         g_return_val_if_fail(FOLDER_CLASS(item->item.folder) == &imap_class, FALSE);
4801
4802         if (item->item.path == NULL)
4803                 return FALSE;
4804
4805         if (item->should_update) {
4806                 debug_print("scan already required\n");
4807                 return TRUE;
4808         }
4809         debug_print("getting session...\n");
4810         session = imap_session_get(folder);
4811
4812         g_return_val_if_fail(session != NULL, FALSE);
4813         lock_session(session); /* unlocked later in the function */
4814
4815         selected_folder = (session->mbox != NULL) &&
4816                           (!strcmp(session->mbox, item->item.path));
4817         if (selected_folder) {
4818                 if (!session->folder_content_changed) {
4819                         ok = imap_cmd_noop(session);
4820                         if (ok != MAILIMAP_NO_ERROR) {
4821                                 debug_print("disconnected!\n");
4822                                 if (!is_fatal(ok))
4823                                         session = imap_reconnect_if_possible(folder, session);
4824                                 else
4825                                         session = imap_session_get(folder);
4826                                 if (session == NULL)
4827                                         return FALSE;
4828                         }
4829
4830                         if (session->folder_content_changed) {
4831                                 debug_print("CHANGED (self-noop)! scan_required\n");
4832                                 item->should_update = TRUE;
4833                                 if (session->uid_validity && session->uid_validity != item->item.mtime) {
4834                                         item->item.mtime = session->uid_validity;
4835                                         item->should_trash_cache = TRUE;
4836                                 }
4837                                 unlock_session(session);
4838                                 return TRUE;
4839                         }
4840                 } else {
4841                         debug_print("CHANGED (previous noop)! scan_required\n");
4842                         item->should_update = TRUE;
4843                         if (session->uid_validity && session->uid_validity != item->item.mtime) {
4844                                 item->item.mtime = session->uid_validity;
4845                                 item->should_trash_cache = TRUE;
4846                         }
4847                         unlock_session(session);
4848                         return TRUE;
4849                 }
4850         } else {
4851                 ok = imap_status(session, IMAP_FOLDER(folder), item->item.path, IMAP_FOLDER_ITEM(item),
4852                                  &exists, &uid_next, &uid_val, &unseen, FALSE);
4853                 if (ok != MAILIMAP_NO_ERROR) {
4854                         return FALSE;
4855                 }
4856
4857                 debug_print("exists %d, item->item.total_msgs %d\n"
4858                             "\tunseen %d, item->item.unread_msgs %d\n"
4859                             "\tuid_next %d, item->uid_next %d\n"
4860                             "\tuid_val %d, item->item.mtime %ld\n",
4861                             exists, item->item.total_msgs, unseen, item->item.unread_msgs,
4862                             uid_next, item->uid_next, uid_val, (long)(item->item.mtime));
4863                 if (exists != item->item.total_msgs
4864                     || unseen != item->item.unread_msgs
4865                     || uid_next != item->uid_next
4866                     || uid_val != item->item.mtime) {
4867                         debug_print("CHANGED (status)! scan_required\n");
4868                         item->last_change = time(NULL);
4869                         item->should_update = TRUE;
4870                         item->uid_next = uid_next;
4871                         if (uid_val != item->item.mtime) {
4872                                 item->item.mtime = uid_val;
4873                                 item->should_trash_cache = TRUE;
4874                         }
4875                         unlock_session(session);
4876                         return TRUE;
4877                 }
4878         }
4879         unlock_session(session);
4880
4881         item->should_update = FALSE;
4882         return FALSE;
4883 }
4884
4885 void imap_change_flags(Folder *folder, FolderItem *item, MsgInfo *msginfo, MsgPermFlags newflags)
4886 {
4887         IMAPSession *session;
4888         IMAPFlags flags_set = 0, flags_unset = 0;
4889         gint ok = MAILIMAP_NO_ERROR;
4890         MsgNumberList numlist;
4891         hashtable_data *ht_data = NULL;
4892
4893         g_return_if_fail(folder != NULL);
4894         g_return_if_fail(folder->klass == &imap_class);
4895         g_return_if_fail(item != NULL);
4896         g_return_if_fail(item->folder == folder);
4897         g_return_if_fail(msginfo != NULL);
4898         g_return_if_fail(msginfo->folder == item);
4899
4900         if (!MSG_IS_MARKED(msginfo->flags) &&  (newflags & MSG_MARKED))
4901                 flags_set |= IMAP_FLAG_FLAGGED;
4902         if ( MSG_IS_MARKED(msginfo->flags) && !(newflags & MSG_MARKED))
4903                 flags_unset |= IMAP_FLAG_FLAGGED;
4904
4905         if (!MSG_IS_UNREAD(msginfo->flags) &&  (newflags & MSG_UNREAD))
4906                 flags_unset |= IMAP_FLAG_SEEN;
4907         if ( MSG_IS_UNREAD(msginfo->flags) && !(newflags & MSG_UNREAD))
4908                 flags_set |= IMAP_FLAG_SEEN;
4909
4910         if (!MSG_IS_REPLIED(msginfo->flags) &&  (newflags & MSG_REPLIED))
4911                 flags_set |= IMAP_FLAG_ANSWERED;
4912         if ( MSG_IS_REPLIED(msginfo->flags) && !(newflags & MSG_REPLIED))
4913                 flags_unset |= IMAP_FLAG_ANSWERED;
4914
4915         if (!MSG_IS_FORWARDED(msginfo->flags) &&  (newflags & MSG_FORWARDED))
4916                 flags_set |= IMAP_FLAG_FORWARDED;
4917         if ( MSG_IS_FORWARDED(msginfo->flags) && !(newflags & MSG_FORWARDED))
4918                 flags_unset |= IMAP_FLAG_FORWARDED;
4919
4920         if (!MSG_IS_SPAM(msginfo->flags) &&  (newflags & MSG_SPAM)) {
4921                 flags_set |= IMAP_FLAG_SPAM;
4922                 flags_unset |= IMAP_FLAG_HAM;
4923         }
4924         if ( MSG_IS_SPAM(msginfo->flags) && !(newflags & MSG_SPAM)) {
4925                 flags_set |= IMAP_FLAG_HAM;
4926                 flags_unset |= IMAP_FLAG_SPAM;
4927         }
4928         if (!MSG_IS_DELETED(msginfo->flags) &&  (newflags & MSG_DELETED))
4929                 flags_set |= IMAP_FLAG_DELETED;
4930         if ( MSG_IS_DELETED(msginfo->flags) && !(newflags & MSG_DELETED))
4931                 flags_unset |= IMAP_FLAG_DELETED;
4932
4933         if (!flags_set && !flags_unset) {
4934                 /* the changed flags were not translatable to IMAP-speak.
4935                  * like MSG_POSTFILTERED, so just apply. */
4936                 msginfo->flags.perm_flags = newflags;
4937                 return;
4938         }
4939
4940         debug_print("getting session...\n");
4941         session = imap_session_get(folder);
4942         if (!session) {
4943                 return;
4944         }
4945
4946         if ((ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
4947             NULL, NULL, NULL, NULL, NULL, FALSE)) != MAILIMAP_NO_ERROR) {
4948                 return;
4949         }
4950         numlist.next = NULL;
4951         numlist.data = GINT_TO_POINTER(msginfo->msgnum);
4952
4953         if (IMAP_FOLDER_ITEM(item)->batching) {
4954                 /* instead of performing an UID STORE command for each message change,
4955                  * as a lot of them can change "together", we just fill in hashtables
4956                  * and defer the treatment so that we're able to send only one
4957                  * command.
4958                  */
4959                 debug_print("IMAP batch mode on, deferring flags change\n");
4960                 if (flags_set) {
4961                         ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->flags_set_table,
4962                                 GINT_TO_POINTER(flags_set));
4963                         if (ht_data == NULL) {
4964                                 ht_data = g_new0(hashtable_data, 1);
4965                                 ht_data->item = IMAP_FOLDER_ITEM(item);
4966                                 g_hash_table_insert(IMAP_FOLDER_ITEM(item)->flags_set_table,
4967                                         GINT_TO_POINTER(flags_set), ht_data);
4968                         }
4969                         ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
4970                 }
4971                 if (flags_unset) {
4972                         ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->flags_unset_table,
4973                                 GINT_TO_POINTER(flags_unset));
4974                         if (ht_data == NULL) {
4975                                 ht_data = g_new0(hashtable_data, 1);
4976                                 ht_data->item = IMAP_FOLDER_ITEM(item);
4977                                 g_hash_table_insert(IMAP_FOLDER_ITEM(item)->flags_unset_table,
4978                                         GINT_TO_POINTER(flags_unset), ht_data);
4979                         }
4980                         ht_data->msglist = g_slist_prepend(ht_data->msglist,
4981                                         GINT_TO_POINTER(msginfo->msgnum));
4982                 }
4983         } else {
4984                 debug_print("IMAP changing flags\n");
4985                 if (flags_set) {
4986                         ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item), &numlist, flags_set, NULL, TRUE);
4987                         if (ok != MAILIMAP_NO_ERROR) {
4988                                 return;
4989                         }
4990                 }
4991
4992                 if (flags_unset) {
4993                         ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item), &numlist, flags_unset, NULL, FALSE);
4994                         if (ok != MAILIMAP_NO_ERROR) {
4995                                 return;
4996                         }
4997                 }
4998         }
4999         msginfo->flags.perm_flags = newflags;
5000         return;
5001 }
5002
5003 static gint imap_remove_msg(Folder *folder, FolderItem *item, gint uid)
5004 {
5005         gint ok;
5006         IMAPSession *session;
5007         gchar *dir;
5008         MsgNumberList numlist;
5009
5010         g_return_val_if_fail(folder != NULL, -1);
5011         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
5012         g_return_val_if_fail(item != NULL, -1);
5013
5014         debug_print("getting session...\n");
5015         session = imap_session_get(folder);
5016         if (!session) return -1;
5017
5018         ok = imap_select(session, IMAP_FOLDER(folder), item,
5019                          NULL, NULL, NULL, NULL, NULL, FALSE);
5020         if (ok != MAILIMAP_NO_ERROR) {
5021                 return ok;
5022         }
5023         numlist.next = NULL;
5024         numlist.data = GINT_TO_POINTER(uid);
5025
5026         ok = imap_set_message_flags
5027                 (session, IMAP_FOLDER_ITEM(item), &numlist, IMAP_FLAG_DELETED, NULL, TRUE);
5028         if (ok != MAILIMAP_NO_ERROR) {
5029                 log_warning(LOG_PROTOCOL, _("can't set deleted flags: %d\n"), uid);
5030                 return ok;
5031         }
5032
5033         ok = imap_cmd_expunge(session);
5034
5035         if (ok != MAILIMAP_NO_ERROR) {
5036                 log_warning(LOG_PROTOCOL, _("can't expunge\n"));
5037                 return ok;
5038         }
5039
5040         IMAP_FOLDER_ITEM(item)->uid_list = g_slist_remove(
5041             IMAP_FOLDER_ITEM(item)->uid_list, numlist.data);
5042         dir = folder_item_get_path(item);
5043         if (is_dir_exist(dir))
5044                 remove_numbered_files(dir, uid, uid);
5045         g_free(dir);
5046         return MAILIMAP_NO_ERROR;
5047 }
5048
5049 static gint compare_msginfo(gconstpointer a, gconstpointer b)
5050 {
5051         return ((MsgInfo *)a)->msgnum - ((MsgInfo *)b)->msgnum;
5052 }
5053
5054 static guint gslist_find_next_num(MsgNumberList **list, guint num)
5055 {
5056         GSList *elem;
5057
5058         g_return_val_if_fail(list != NULL, -1);
5059
5060         for (elem = *list; elem != NULL; elem = g_slist_next(elem))
5061                 if (GPOINTER_TO_INT(elem->data) >= num)
5062                         break;
5063         *list = elem;
5064         return elem != NULL ? GPOINTER_TO_INT(elem->data) : (gint)-1;
5065 }
5066
5067 static gboolean flag_ok(IMAPFolderItem *item, guint flag)
5068 {
5069         if (item->ok_flags && g_slist_find(item->ok_flags, GUINT_TO_POINTER(flag))) {
5070                 debug_print("flag %d is OK\n", flag);
5071                 return TRUE;
5072         }
5073         if (item->can_create_flags == ITEM_CAN_CREATE_FLAGS) {
5074                 debug_print("creating flags is OK\n");
5075                 return TRUE;
5076         }
5077         return FALSE;
5078 }
5079
5080 /*
5081  * NEW and DELETED flags are not syncronized
5082  * - The NEW/RECENT flags in IMAP folders can not really be directly
5083  *   modified by Sylpheed
5084  * - The DELETE/DELETED flag in IMAP and Sylpheed don't have the same
5085  *   meaning, in IMAP it always removes the messages from the FolderItem
5086  *   in Sylpheed it can mean to move the message to trash
5087  */
5088
5089 typedef struct _get_flags_data {
5090         Folder *folder;
5091         FolderItem *item;
5092         MsgInfoList *msginfo_list;
5093         GHashTable *msgflags;
5094         gboolean full_search;
5095         gboolean done;
5096 } get_flags_data;
5097
5098 static /*gint*/ void *imap_get_flags_thread(void *data)
5099 {
5100         get_flags_data *stuff = (get_flags_data *)data;
5101         Folder *folder = stuff->folder;
5102         FolderItem *fitem = (FolderItem *) stuff->item;
5103         MsgInfoList *msginfo_list = stuff->msginfo_list;
5104         GHashTable *msgflags = stuff->msgflags;
5105         GSList *elem;
5106         carray * lep_uidtab;
5107         IMAPSession *session;
5108         gint ok;
5109         int r = MAILIMAP_NO_ERROR;
5110         GHashTable *flags_hash = NULL;
5111         GHashTable *tags_hash = NULL;
5112         gboolean full_search = stuff->full_search;
5113         GSList *sorted_list = NULL;
5114         GSList *unseen = NULL, *answered = NULL, *flagged = NULL, *deleted = NULL, *forwarded = NULL, *spam = NULL;
5115         GSList *seq_list, *cur;
5116         gboolean reverse_seen = FALSE;
5117         gboolean selected_folder;
5118         gint exists_cnt, unseen_cnt;
5119         gboolean got_alien_tags = FALSE;
5120
5121         session = imap_session_get(folder);
5122
5123         if (session == NULL) {
5124                 stuff->done = TRUE;
5125                 return GINT_TO_POINTER(-1);
5126         }
5127         selected_folder = (session->mbox != NULL) &&
5128                           (!strcmp(session->mbox, fitem->path));
5129
5130         lock_session(session);
5131         if (!selected_folder) {
5132                 ok = imap_select(session, IMAP_FOLDER(folder), fitem,
5133                         &exists_cnt, NULL, &unseen_cnt, NULL, NULL, TRUE);
5134                 if (ok != MAILIMAP_NO_ERROR) {
5135                         stuff->done = TRUE;
5136                         return GINT_TO_POINTER(-1);
5137                 }
5138
5139                 if (unseen_cnt > exists_cnt / 2)
5140                         reverse_seen = TRUE;
5141         }
5142         else {
5143                 if (fitem->unread_msgs > fitem->total_msgs / 2)
5144                         reverse_seen = TRUE;
5145         }
5146
5147         sorted_list = g_slist_sort(g_slist_copy(msginfo_list), compare_msginfo);
5148         if (!full_search) {
5149                 seq_list = imap_get_lep_set_from_msglist(IMAP_FOLDER(folder), msginfo_list);
5150         } else {
5151                 struct mailimap_set * set;
5152                 set = mailimap_set_new_interval(1, 0);
5153                 seq_list = g_slist_append(NULL, set);
5154         }
5155
5156         if (folder->account && folder->account->low_bandwidth) {
5157                 for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
5158                         struct mailimap_set * imapset;
5159                         clist * lep_uidlist;
5160                         int r;
5161
5162                         imapset = cur->data;
5163                         if (reverse_seen) {
5164                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SEEN, NULL,
5165                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5166                         }
5167                         else {
5168                                 r = imap_threaded_search(folder,
5169                                                          IMAP_SEARCH_TYPE_UNSEEN, NULL,
5170                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5171                         }
5172                         if (r == MAILIMAP_NO_ERROR) {
5173                                 GSList * uidlist;
5174
5175                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5176                                 mailimap_search_result_free(lep_uidlist);
5177
5178                                 unseen = g_slist_concat(unseen, uidlist);
5179                         } else {
5180                                 imap_handle_error(SESSION(session), NULL, r);
5181                                 goto bail;
5182                         }
5183
5184                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_FLAGGED, NULL,
5185                                                  NULL, full_search ? NULL:imapset, &lep_uidlist);
5186                         if (r == MAILIMAP_NO_ERROR) {
5187                                 GSList * uidlist;
5188
5189                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5190                                 mailimap_search_result_free(lep_uidlist);
5191
5192                                 flagged = g_slist_concat(flagged, uidlist);
5193                         } else {
5194                                 imap_handle_error(SESSION(session), NULL, r);
5195                                 goto bail;
5196                         }
5197
5198                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
5199                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_ANSWERED, NULL,
5200                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5201                                 if (r == MAILIMAP_NO_ERROR) {
5202                                         GSList * uidlist;
5203
5204                                         uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5205                                         mailimap_search_result_free(lep_uidlist);
5206
5207                                         answered = g_slist_concat(answered, uidlist);
5208                                 } else {
5209                                         imap_handle_error(SESSION(session), NULL, r);
5210                                         goto bail;
5211                                 }
5212
5213                                 if (flag_ok(IMAP_FOLDER_ITEM(fitem), IMAP_FLAG_FORWARDED)) {
5214                                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_FORWARDED, NULL,
5215                                                                  NULL, full_search ? NULL:imapset, &lep_uidlist);
5216                                         if (r == MAILIMAP_NO_ERROR) {
5217                                                 GSList * uidlist;
5218
5219                                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5220                                                 mailimap_search_result_free(lep_uidlist);
5221
5222                                                 forwarded = g_slist_concat(forwarded, uidlist);
5223                                         } else {
5224                                                 imap_handle_error(SESSION(session), NULL, r);
5225                                                 goto bail;
5226                                         }
5227                                 }
5228
5229                                 if (flag_ok(IMAP_FOLDER_ITEM(fitem), IMAP_FLAG_SPAM)) {
5230                                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SPAM, NULL,
5231                                                                  NULL, full_search ? NULL:imapset, &lep_uidlist);
5232                                         if (r == MAILIMAP_NO_ERROR) {
5233                                                 GSList * uidlist;
5234
5235                                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5236                                                 mailimap_search_result_free(lep_uidlist);
5237
5238                                                 spam = g_slist_concat(spam, uidlist);
5239                                         } else {
5240                                                 imap_handle_error(SESSION(session), NULL, r);
5241                                                 goto bail;
5242                                         }
5243                                 }
5244
5245                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_DELETED, NULL,
5246                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5247                                 if (r == MAILIMAP_NO_ERROR) {
5248                                         GSList * uidlist;
5249
5250                                         uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5251                                         mailimap_search_result_free(lep_uidlist);
5252
5253                                         deleted = g_slist_concat(deleted, uidlist);
5254                                 } else {
5255                                         imap_handle_error(SESSION(session), NULL, r);
5256                                         goto bail;
5257                                 }
5258                         }
5259                 }
5260
5261         } else {
5262                 r = imap_threaded_fetch_uid_flags(folder, 1, &lep_uidtab);
5263                 if (r == MAILIMAP_NO_ERROR) {
5264                         flags_hash = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, NULL);
5265                         tags_hash = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, NULL);
5266                         imap_flags_hash_from_lep_uid_flags_tab(lep_uidtab, flags_hash, tags_hash);
5267                         imap_fetch_uid_flags_list_free(lep_uidtab);
5268                 } else {
5269                         imap_handle_error(SESSION(session), NULL, r);
5270                         goto bail;
5271                 }
5272         }
5273
5274 bail:
5275         if (r == MAILIMAP_NO_ERROR)
5276                 unlock_session(session);
5277
5278         for (elem = sorted_list; elem != NULL; elem = g_slist_next(elem)) {
5279                 MsgInfo *msginfo;
5280                 MsgPermFlags flags, oldflags;
5281                 gboolean wasnew;
5282
5283                 msginfo = (MsgInfo *) elem->data;
5284                 flags = msginfo->flags.perm_flags;
5285                 wasnew = (flags & MSG_NEW);
5286                 oldflags = flags & ~(MSG_NEW|MSG_UNREAD|MSG_REPLIED|MSG_FORWARDED|MSG_MARKED|MSG_DELETED|MSG_SPAM);
5287
5288                 if (folder->account && folder->account->low_bandwidth) {
5289                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
5290                                 flags &= ~((reverse_seen ? 0 : MSG_UNREAD | MSG_NEW) | MSG_REPLIED | MSG_FORWARDED | MSG_MARKED | MSG_SPAM);
5291                         } else {
5292                                 flags &= ~((reverse_seen ? 0 : MSG_UNREAD | MSG_NEW | MSG_MARKED));
5293                         }
5294                         if (reverse_seen)
5295                                 flags |= MSG_UNREAD | (wasnew ? MSG_NEW : 0);
5296                         if (gslist_find_next_num(&unseen, msginfo->msgnum) == msginfo->msgnum) {
5297                                 if (!reverse_seen) {
5298                                         flags |= MSG_UNREAD | (wasnew ? MSG_NEW : 0);
5299                                 } else {
5300                                         flags &= ~(MSG_UNREAD | MSG_NEW);
5301                                 }
5302                         }
5303
5304                         if (gslist_find_next_num(&flagged, msginfo->msgnum) == msginfo->msgnum)
5305                                 flags |= MSG_MARKED;
5306                         else
5307                                 flags &= ~MSG_MARKED;
5308
5309                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
5310                                 if (gslist_find_next_num(&answered, msginfo->msgnum) == msginfo->msgnum)
5311                                         flags |= MSG_REPLIED;
5312                                 else
5313                                         flags &= ~MSG_REPLIED;
5314                                 if (gslist_find_next_num(&forwarded, msginfo->msgnum) == msginfo->msgnum)
5315                                         flags |= MSG_FORWARDED;
5316                                 else
5317                                         flags &= ~MSG_FORWARDED;
5318                                 if (gslist_find_next_num(&spam, msginfo->msgnum) == msginfo->msgnum)
5319                                         flags |= MSG_SPAM;
5320                                 else
5321                                         flags &= ~MSG_SPAM;
5322                                 if (gslist_find_next_num(&deleted, msginfo->msgnum) == msginfo->msgnum)
5323                                         flags |= MSG_DELETED;
5324                                 else
5325                                         flags &= ~MSG_DELETED;
5326                         }
5327                 } else {
5328                         if (flags_hash != NULL) {
5329
5330                                 flags = GPOINTER_TO_INT(g_hash_table_lookup(flags_hash,
5331                                                 GINT_TO_POINTER(msginfo->msgnum)));
5332                         }
5333
5334                         if ((flags & MSG_UNREAD) == 0)
5335                                 flags &= ~MSG_NEW;
5336                         else if (wasnew)
5337                                 flags |= MSG_NEW;
5338                         flags |= oldflags;
5339
5340                         if (tags_hash != NULL) {
5341                                 GSList *tags = g_hash_table_lookup(tags_hash, GINT_TO_POINTER(msginfo->msgnum));
5342                                 GSList *cur;
5343
5344                                 g_slist_free(msginfo->tags);
5345                                 msginfo->tags = NULL;
5346
5347                                 for (cur = tags; cur; cur = cur->next) {
5348                                         gchar *real_tag = imap_modified_utf7_to_utf8(cur->data, TRUE);
5349                                         gint id = 0;
5350                                         id = tags_get_id_for_str(real_tag);
5351                                         if (id == -1) {
5352                                                 id = tags_add_tag(real_tag);
5353                                                 got_alien_tags = TRUE;
5354                                         }
5355                                         msginfo->tags = g_slist_append(
5356                                                                 msginfo->tags,
5357                                                                 GINT_TO_POINTER(id));
5358                                         g_free(real_tag);
5359                                 }
5360                                 slist_free_strings_full(tags);
5361                         }
5362                 }
5363
5364                 g_hash_table_insert(msgflags, msginfo, GINT_TO_POINTER(flags));
5365         }
5366
5367         if (got_alien_tags) {
5368                 tags_write_tags();
5369                 main_window_reflect_tags_changes(mainwindow_get_mainwindow());
5370         }
5371
5372         if (flags_hash)
5373                 g_hash_table_destroy(flags_hash);
5374         if (tags_hash)
5375                 g_hash_table_destroy(tags_hash);
5376
5377         imap_lep_set_free(seq_list);
5378         g_slist_free(flagged);
5379         g_slist_free(deleted);
5380         g_slist_free(answered);
5381         g_slist_free(forwarded);
5382         g_slist_free(spam);
5383         g_slist_free(unseen);
5384         g_slist_free(sorted_list);
5385
5386         stuff->done = TRUE;
5387         return GINT_TO_POINTER(0);
5388 }
5389
5390 static gint imap_get_flags(Folder *folder, FolderItem *item,
5391                            MsgInfoList *msginfo_list, GHashTable *msgflags)
5392 {
5393         gint result;
5394         get_flags_data *data = g_new0(get_flags_data, 1);
5395         data->done = FALSE;
5396         data->folder = folder;
5397         data->item = item;
5398         data->msginfo_list = msginfo_list;
5399         data->msgflags = msgflags;
5400         data->full_search = FALSE;
5401
5402         GSList *tmp = NULL, *cur;
5403
5404         if (prefs_common.work_offline &&
5405             !inc_offline_should_override(FALSE,
5406                 _("Claws Mail needs network access in order "
5407                   "to access the IMAP server."))) {
5408                 g_free(data);
5409                 return -1;
5410         }
5411
5412         tmp = folder_item_get_msg_list(item);
5413
5414         if (g_slist_length(tmp) <= g_slist_length(msginfo_list))
5415                 data->full_search = TRUE;
5416
5417         for (cur = tmp; cur; cur = cur->next)
5418                 procmsg_msginfo_free((MsgInfo **)&(cur->data));
5419
5420         g_slist_free(tmp);
5421
5422         result = GPOINTER_TO_INT(imap_get_flags_thread(data));
5423
5424         g_free(data);
5425         return result;
5426
5427 }
5428
5429 static gboolean process_flags(gpointer key, gpointer value, gpointer user_data)
5430 {
5431         gboolean flags_set = GPOINTER_TO_INT(user_data);
5432         gint flags_value = GPOINTER_TO_INT(key);
5433         hashtable_data *data = (hashtable_data *)value;
5434         IMAPFolderItem *_item = data->item;
5435         FolderItem *item = (FolderItem *)_item;
5436         gint ok = MAILIMAP_ERROR_BAD_STATE;
5437         IMAPSession *session = NULL;
5438
5439         debug_print("getting session...\n");
5440         session = imap_session_get(item->folder);
5441
5442         data->msglist = g_slist_reverse(data->msglist);
5443
5444         debug_print("IMAP %ssetting flags to %d for %d messages\n",
5445                 flags_set?"":"un",
5446                 flags_value,
5447                 g_slist_length(data->msglist));
5448
5449         lock_session(session);
5450         if (session) {
5451                 ok = imap_select(session, IMAP_FOLDER(item->folder), item,
5452                          NULL, NULL, NULL, NULL, NULL, FALSE);
5453         }
5454         if (ok == MAILIMAP_NO_ERROR) {
5455                 ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item),
5456                         data->msglist, flags_value, NULL, flags_set);
5457         } else {
5458                 g_warning("can't select mailbox %s", item->path);
5459         }
5460
5461         if (!is_fatal(ok))
5462                 unlock_session(session);
5463
5464         g_slist_free(data->msglist);
5465         g_free(data);
5466         return TRUE;
5467 }
5468
5469 static gboolean process_tags(gpointer key, gpointer value, gpointer user_data)
5470 {
5471         gboolean tags_set = GPOINTER_TO_INT(user_data);
5472         TagsData *data = (TagsData *)value;
5473         IMAPFolderItem *_item = data->item;
5474         FolderItem *item = (FolderItem *)_item;
5475         gchar *str = data->str;
5476         gint ok = MAILIMAP_ERROR_BAD_STATE;
5477         IMAPSession *session = NULL;
5478
5479         debug_print("getting session...\n");
5480         session = imap_session_get(item->folder);
5481
5482         data->msglist = g_slist_reverse(data->msglist);
5483
5484         debug_print("IMAP %ssetting tags %s for %d messages\n",
5485                 tags_set?"":"un",
5486                 str,
5487                 g_slist_length(data->msglist));
5488
5489         lock_session(session);
5490         if (session) {
5491                 ok = imap_select(session, IMAP_FOLDER(item->folder), item,
5492                          NULL, NULL, NULL, NULL, NULL, FALSE);
5493         }
5494         if (ok == MAILIMAP_NO_ERROR) {
5495                 GSList list;
5496                 list.data = str;
5497                 list.next = NULL;
5498                 ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item),
5499                         data->msglist, 0, &list, tags_set);
5500         } else {
5501                 g_warning("can't select mailbox %s", item->path);
5502         }
5503
5504         if (!is_fatal(ok))
5505                 unlock_session(session);
5506
5507         g_slist_free(data->msglist);
5508         g_free(data->str);
5509         g_free(data);
5510         return TRUE;
5511 }
5512
5513 static void process_hashtable(IMAPFolderItem *item)
5514 {
5515         if (item->flags_set_table) {
5516                 g_hash_table_foreach_remove(item->flags_set_table, process_flags, GINT_TO_POINTER(TRUE));
5517                 g_hash_table_destroy(item->flags_set_table);
5518                 item->flags_set_table = NULL;
5519         }
5520         if (item->flags_unset_table) {
5521                 g_hash_table_foreach_remove(item->flags_unset_table, process_flags, GINT_TO_POINTER(FALSE));
5522                 g_hash_table_destroy(item->flags_unset_table);
5523                 item->flags_unset_table = NULL;
5524         }
5525         if (item->tags_set_table) {
5526                 g_hash_table_foreach_remove(item->tags_set_table, process_tags, GINT_TO_POINTER(TRUE));
5527                 g_hash_table_destroy(item->tags_set_table);
5528                 item->tags_set_table = NULL;
5529         }
5530         if (item->tags_unset_table) {
5531                 g_hash_table_foreach_remove(item->tags_unset_table, process_tags, GINT_TO_POINTER(FALSE));
5532                 g_hash_table_destroy(item->tags_unset_table);
5533                 item->tags_unset_table = NULL;
5534         }
5535
5536 }
5537
5538 static void imap_set_batch (Folder *folder, FolderItem *_item, gboolean batch)
5539 {
5540         IMAPFolderItem *item = (IMAPFolderItem *)_item;
5541         IMAPSession *session;
5542
5543         g_return_if_fail(item != NULL);
5544
5545         if (item->batching == batch)
5546                 return;
5547
5548         if (batch) {
5549                 item->batching = TRUE;
5550                 debug_print("IMAP switching to batch mode\n");
5551                 if (!item->flags_set_table) {
5552                         item->flags_set_table = g_hash_table_new(NULL, g_direct_equal);
5553                 }
5554                 if (!item->flags_unset_table) {
5555                         item->flags_unset_table = g_hash_table_new(NULL, g_direct_equal);
5556                 }
5557                 if (!item->tags_set_table) {
5558                         item->tags_set_table = g_hash_table_new(NULL, g_direct_equal);
5559                 }
5560                 if (!item->tags_unset_table) {
5561                         item->tags_unset_table = g_hash_table_new(NULL, g_direct_equal);
5562                 }
5563                 session = imap_session_get(folder);
5564                 if (session) {
5565                         imap_refresh_sensitivity(session);
5566                         session->sens_update_block = TRUE;
5567                 }
5568         } else {
5569                 debug_print("IMAP switching away from batch mode\n");
5570                 /* process stuff */
5571                 process_hashtable(item);
5572                 item->batching = FALSE;
5573                 session = imap_session_get(folder);
5574                 if (session) {
5575                         session->sens_update_block = FALSE;
5576                         imap_refresh_sensitivity(session);
5577                 }
5578         }
5579 }
5580
5581
5582
5583 /* data types conversion libetpan <-> claws */
5584
5585
5586
5587 #define ETPAN_IMAP_MB_MARKED      1
5588 #define ETPAN_IMAP_MB_UNMARKED    2
5589 #define ETPAN_IMAP_MB_NOSELECT    4
5590 #define ETPAN_IMAP_MB_NOINFERIORS 8
5591
5592 static int imap_flags_to_flags(struct mailimap_mbx_list_flags * imap_flags)
5593 {
5594   int flags;
5595   clistiter * cur;
5596
5597   flags = 0;
5598   if (imap_flags->mbf_type == MAILIMAP_MBX_LIST_FLAGS_SFLAG) {
5599     switch (imap_flags->mbf_sflag) {
5600     case MAILIMAP_MBX_LIST_SFLAG_MARKED:
5601       flags |= ETPAN_IMAP_MB_MARKED;
5602       break;
5603     case MAILIMAP_MBX_LIST_SFLAG_NOSELECT:
5604       flags |= ETPAN_IMAP_MB_NOSELECT;
5605       break;
5606     case MAILIMAP_MBX_LIST_SFLAG_UNMARKED:
5607       flags |= ETPAN_IMAP_MB_UNMARKED;
5608       break;
5609     }
5610   }
5611
5612   if (imap_flags->mbf_oflags) {
5613     for(cur = clist_begin(imap_flags->mbf_oflags) ; cur != NULL ;
5614         cur = clist_next(cur)) {
5615       struct mailimap_mbx_list_oflag * oflag;
5616
5617       oflag = clist_content(cur);
5618
5619       switch (oflag->of_type) {
5620       case MAILIMAP_MBX_LIST_OFLAG_NOINFERIORS:
5621         flags |= ETPAN_IMAP_MB_NOINFERIORS;
5622         break;
5623       }
5624     }
5625   }
5626   return flags;
5627 }
5628
5629 static GSList * imap_list_from_lep(IMAPFolder * folder,
5630                                    clist * list, const gchar * real_path, gboolean all)
5631 {
5632         clistiter * iter;
5633         GSList * item_list = NULL, *llast = NULL;
5634
5635         if (list) {
5636                 for(iter = clist_begin(list) ; iter != NULL ;
5637                     iter = clist_next(iter)) {
5638                         struct mailimap_mailbox_list * mb;
5639                         int flags;
5640                         char delimiter;
5641                         char * name;
5642                         char * dup_name;
5643                         gchar * base;
5644                         gchar * loc_name;
5645                         gchar * loc_path;
5646                         FolderItem *new_item;
5647
5648                         mb = clist_content(iter);
5649
5650                         if (mb == NULL)
5651                                 continue;
5652
5653                         flags = 0;
5654                         if (mb->mb_flag != NULL)
5655                                 flags = imap_flags_to_flags(mb->mb_flag);
5656
5657                         delimiter = mb->mb_delimiter;
5658                         name = mb->mb_name;
5659
5660                         dup_name = strdup(name);
5661                         if (delimiter != '\0')
5662                                 subst_char(dup_name, delimiter, '/');
5663
5664                         base = g_path_get_basename(dup_name);
5665                         if (base[0] == '.') {
5666                                 g_free(base);
5667                                 free(dup_name);
5668                                 continue;
5669                         }
5670                         if (!all && path_cmp(name, real_path) == 0) {
5671                                 g_free(base);
5672                                 free(dup_name);
5673                                 continue;
5674                         }
5675
5676                         if (!all && dup_name[strlen(dup_name)-1] == '/') {
5677                                 g_free(base);
5678                                 free(dup_name);
5679                                 continue;
5680                         }
5681
5682                         loc_name = imap_modified_utf7_to_utf8(base, FALSE);
5683                         loc_path = imap_modified_utf7_to_utf8(dup_name, FALSE);
5684
5685                         new_item = folder_item_new(FOLDER(folder), loc_name, loc_path);
5686                         if ((flags & ETPAN_IMAP_MB_NOINFERIORS) != 0)
5687                                 new_item->no_sub = TRUE;
5688                         if (strcasecmp(dup_name, "INBOX") != 0 &&
5689                             ((flags & ETPAN_IMAP_MB_NOSELECT) != 0))
5690                                 new_item->no_select = TRUE;
5691
5692                         if (item_list == NULL)
5693                                 llast = item_list = g_slist_append(item_list, new_item);
5694                         else {
5695                                 llast = g_slist_append(llast, new_item);
5696                                 llast = llast->next;
5697                         }
5698                         debug_print("folder '%s' found.\n", loc_path);
5699                         g_free(base);
5700                         g_free(loc_path);
5701                         g_free(loc_name);
5702
5703                         free(dup_name);
5704                 }
5705         }
5706         return item_list;
5707 }
5708
5709 static GSList * imap_get_lep_set_from_numlist(IMAPFolder *folder, MsgNumberList *numlist)
5710 {
5711         GSList *sorted_list, *cur;
5712         guint first, last, next;
5713         GSList *ret_list = NULL, *llast = NULL;
5714         struct mailimap_set * current_set;
5715         unsigned int item_count;
5716
5717         if (numlist == NULL)
5718                 return NULL;
5719
5720         current_set = mailimap_set_new_empty();
5721
5722         sorted_list = g_slist_copy(numlist);
5723         sorted_list = g_slist_sort(sorted_list, g_int_compare);
5724
5725         first = GPOINTER_TO_INT(sorted_list->data);
5726
5727         item_count = 0;
5728         for (cur = sorted_list; cur != NULL; cur = g_slist_next(cur)) {
5729                 if (GPOINTER_TO_INT(cur->data) == 0)
5730                         continue;
5731
5732                 item_count ++;
5733
5734                 last = GPOINTER_TO_INT(cur->data);
5735                 if (cur->next)
5736                         next = GPOINTER_TO_INT(cur->next->data);
5737                 else
5738                         next = 0;
5739
5740                 if (last + 1 != next || next == 0 || item_count >= folder->max_set_size) {
5741
5742                         struct mailimap_set_item * item;
5743                         item = mailimap_set_item_new(first, last);
5744                         mailimap_set_add(current_set, item);
5745
5746                         first = next;
5747
5748                         if (item_count >= folder->max_set_size) {
5749                                 if (ret_list == NULL)
5750                                         llast = ret_list = g_slist_append(ret_list,
5751                                                           current_set);
5752                                 else {
5753                                         llast = g_slist_append(llast, current_set);
5754                                         llast = llast->next;
5755                                 }
5756
5757                                 current_set = mailimap_set_new_empty();
5758                                 item_count = 0;
5759                         }
5760                 }
5761         }
5762
5763         if (clist_count(current_set->set_list) > 0) {
5764                 ret_list = g_slist_append(ret_list,
5765                                           current_set);
5766         }
5767
5768         g_slist_free(sorted_list);
5769
5770         return ret_list;
5771 }
5772
5773 static GSList * imap_get_lep_set_from_msglist(IMAPFolder *folder, MsgInfoList *msglist)
5774 {
5775         MsgNumberList *numlist = NULL;
5776         GSList *seq_list;
5777
5778         numlist = procmsg_get_number_list_for_msgs(msglist);
5779
5780         seq_list = imap_get_lep_set_from_numlist(folder, numlist);
5781         g_slist_free(numlist);
5782
5783         return seq_list;
5784 }
5785
5786 static GSList * imap_uid_list_from_lep(clist * list, gint* length)
5787 {
5788         clistiter * iter;
5789         GSList * result;
5790         gint len = 0;
5791
5792         result = NULL;
5793
5794         if (list) {
5795                 for(iter = clist_begin(list) ; iter != NULL ;
5796                     iter = clist_next(iter)) {
5797                         uint32_t * puid;
5798
5799                         puid = clist_content(iter);
5800                         result = g_slist_prepend(result, GINT_TO_POINTER(* puid));
5801                         len++;
5802                 }
5803                 result = g_slist_reverse(result);
5804         }
5805         if (length)
5806                 *length = len;
5807         return result;
5808 }
5809
5810 static GSList * imap_uid_list_from_lep_tab(carray * list)
5811 {
5812         unsigned int i;
5813         GSList * result;
5814
5815         result = NULL;
5816
5817         for(i = 0 ; i < carray_count(list) ; i ++) {
5818                 uint32_t * puid;
5819
5820                 puid = carray_get(list, i);
5821                 result = g_slist_prepend(result, GINT_TO_POINTER(* puid));
5822         }
5823         result = g_slist_reverse(result);
5824         return result;
5825 }
5826
5827 static void imap_flags_hash_from_lep_uid_flags_tab(carray * list,
5828                                                    GHashTable * hash,
5829                                                    GHashTable * tags_hash)
5830 {
5831         unsigned int i;
5832
5833         for(i = 0 ; i < carray_count(list) ; i += 3) {
5834                 uint32_t * puid;
5835                 int * pflags;
5836                 GSList *tags;
5837
5838                 puid = carray_get(list, i);
5839                 pflags = carray_get(list, i + 1);
5840                 tags = carray_get(list, i + 2);
5841
5842                 g_hash_table_insert(hash, GINT_TO_POINTER(*puid), GINT_TO_POINTER(* pflags));
5843                 g_hash_table_insert(tags_hash, GINT_TO_POINTER(*puid), tags);
5844         }
5845 }
5846
5847 static MsgInfo *imap_envelope_from_lep(struct imap_fetch_env_info * info,
5848                                        FolderItem *item)
5849 {
5850         MsgInfo *msginfo = NULL;
5851         guint32 uid = 0;
5852         goffset size = 0;
5853         MsgFlags flags = {0, 0};
5854
5855         if (info->headers == NULL)
5856                 return NULL;
5857
5858         MSG_SET_TMP_FLAGS(flags, MSG_IMAP);
5859         if (folder_has_parent_of_type(item, F_QUEUE)) {
5860                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
5861         } else if (folder_has_parent_of_type(item, F_DRAFT)) {
5862                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
5863         }
5864         flags.perm_flags = info->flags;
5865
5866         uid = info->uid;
5867         size = (goffset) info->size;
5868         msginfo = procheader_parse_str(info->headers, flags, FALSE, FALSE);
5869
5870         if (msginfo) {
5871                 msginfo->msgnum = uid;
5872                 msginfo->size = size;
5873         }
5874
5875         return msginfo;
5876 }
5877
5878 static void imap_lep_set_free(GSList *seq_list)
5879 {
5880         GSList * cur;
5881
5882         for(cur = seq_list ; cur != NULL ; cur = g_slist_next(cur)) {
5883                 struct mailimap_set * imapset;
5884
5885                 imapset = cur->data;
5886                 mailimap_set_free(imapset);
5887         }
5888         g_slist_free(seq_list);
5889 }
5890
5891 static struct mailimap_flag_list * imap_flag_to_lep(IMAPFolderItem *item, IMAPFlags flags, GSList *tags)
5892 {
5893         struct mailimap_flag_list * flag_list;
5894         GSList *cur = tags;
5895
5896         flag_list = mailimap_flag_list_new_empty();
5897
5898         if (IMAP_IS_SEEN(flags))
5899                 mailimap_flag_list_add(flag_list,
5900                                        mailimap_flag_new_seen());
5901         if (IMAP_IS_ANSWERED(flags))
5902                 mailimap_flag_list_add(flag_list,
5903                                        mailimap_flag_new_answered());
5904         if (IMAP_IS_FLAGGED(flags))
5905                 mailimap_flag_list_add(flag_list,
5906                                        mailimap_flag_new_flagged());
5907         if (IMAP_IS_DELETED(flags))
5908                 mailimap_flag_list_add(flag_list,
5909                                        mailimap_flag_new_deleted());
5910         if (IMAP_IS_DRAFT(flags))
5911                 mailimap_flag_list_add(flag_list,
5912                                        mailimap_flag_new_draft());
5913         if (IMAP_IS_FORWARDED(flags) && flag_ok(item, IMAP_FLAG_FORWARDED))
5914                 mailimap_flag_list_add(flag_list,
5915                                        mailimap_flag_new_flag_keyword(strdup(RTAG_FORWARDED)));
5916         if (IMAP_IS_SPAM(flags) && flag_ok(item, IMAP_FLAG_SPAM))
5917                 mailimap_flag_list_add(flag_list,
5918                                        mailimap_flag_new_flag_keyword(strdup(RTAG_JUNK)));
5919         else if (IMAP_IS_HAM(flags) && flag_ok(item, IMAP_FLAG_HAM))
5920                 mailimap_flag_list_add(flag_list,
5921                                        mailimap_flag_new_flag_keyword(strdup(RTAG_NON_JUNK)));
5922
5923         for (; cur; cur = cur->next) {
5924                 gchar *enc_str =
5925                         imap_utf8_to_modified_utf7(cur->data, TRUE);
5926                 g_strstrip(enc_str);
5927
5928                 mailimap_flag_list_add(flag_list,
5929                         mailimap_flag_new_flag_keyword(enc_str));
5930         }
5931
5932         return flag_list;
5933 }
5934
5935 guint imap_folder_get_refcnt(Folder *folder)
5936 {
5937         return ((IMAPFolder *)folder)->refcnt;
5938 }
5939
5940 void imap_folder_ref(Folder *folder)
5941 {
5942         ((IMAPFolder *)folder)->refcnt++;
5943 }
5944
5945 void imap_disconnect_all(gboolean have_connectivity)
5946 {
5947         GList *list;
5948         gboolean short_timeout;
5949 #ifdef HAVE_NETWORKMANAGER_SUPPORT
5950         GError *error = NULL;
5951
5952         short_timeout = !networkmanager_is_online(&error);
5953         if(error) {
5954                 short_timeout = TRUE;
5955                 g_error_free(error);
5956         }
5957 #else
5958         short_timeout = TRUE;
5959 #endif
5960
5961         if(short_timeout)
5962                 imap_main_set_timeout(1);
5963
5964         for (list = account_get_list(); list != NULL; list = list->next) {
5965                 PrefsAccount *account = list->data;
5966                 if (account->protocol == A_IMAP4) {
5967                         RemoteFolder *folder = (RemoteFolder *)account->folder;
5968                         if (folder && folder->session) {
5969                                 if (imap_is_busy(FOLDER(folder)))
5970                                         imap_threaded_cancel(FOLDER(folder));
5971
5972                                 IMAPSession *session = (IMAPSession *)folder->session;
5973                                 if (have_connectivity)
5974                                         imap_threaded_disconnect(FOLDER(folder));
5975                                 SESSION(session)->state = SESSION_DISCONNECTED;
5976                                 SESSION(session)->sock = NULL;
5977                                 imap_safe_destroy(session);
5978                                 folder->session = NULL;
5979                         }
5980                 }
5981         }
5982
5983         if(short_timeout)
5984                 imap_main_set_timeout(prefs_common.io_timeout_secs);
5985 }
5986
5987 void imap_folder_unref(Folder *folder)
5988 {
5989         if (((IMAPFolder *)folder)->refcnt > 0)
5990                 ((IMAPFolder *)folder)->refcnt--;
5991 }
5992
5993 void imap_cancel_all(void)
5994 {
5995         GList *folderlist;
5996         GList *cur;
5997
5998         folderlist = folder_get_list();
5999         for (cur = folderlist; cur != NULL; cur = g_list_next(cur)) {
6000                 Folder *folder = (Folder *) cur->data;
6001
6002                 if (folder->klass == &imap_class) {
6003                         if (imap_is_busy(folder)) {
6004                                 IMAPSession *imap_session;
6005                                 RemoteFolder *rfolder;
6006
6007                                 g_printerr("cancelled\n");
6008                                 imap_threaded_cancel(folder);
6009                                 rfolder = (RemoteFolder *) folder;
6010                                 imap_session = (IMAPSession *) rfolder->session;
6011                                 if (imap_session)
6012                                         imap_session->cancelled = 1;
6013                         }
6014                 }
6015         }
6016 }
6017
6018 gboolean imap_cancel_all_enabled(void)
6019 {
6020         GList *folderlist;
6021         GList *cur;
6022
6023         folderlist = folder_get_list();
6024         for (cur = folderlist; cur != NULL; cur = g_list_next(cur)) {
6025                 Folder *folder = (Folder *) cur->data;
6026
6027                 if (folder->klass == &imap_class) {
6028                         if (imap_is_busy(folder)) {
6029                                 return TRUE;
6030                         }
6031                 }
6032         }
6033
6034         return FALSE;
6035 }
6036
6037 static gboolean imap_is_busy(Folder *folder)
6038 {
6039         IMAPSession *imap_session;
6040         RemoteFolder *rfolder;
6041
6042         rfolder = (RemoteFolder *) folder;
6043         imap_session = (IMAPSession *) rfolder->session;
6044         if (imap_session == NULL)
6045                 return FALSE;
6046
6047         return imap_session->busy;
6048 }
6049
6050 #else /* HAVE_LIBETPAN */
6051
6052 static FolderClass imap_class;
6053
6054 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item);
6055 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag);
6056
6057 static Folder   *imap_folder_new        (const gchar    *name,
6058                                          const gchar    *path)
6059 {
6060         static gboolean missing_imap_warning = TRUE;
6061         if (missing_imap_warning) {
6062                 missing_imap_warning = FALSE;
6063                 alertpanel_error(
6064                         _("You have one or more IMAP accounts "
6065                           "defined. However this version of "
6066                           "Claws Mail has been built without "
6067                           "IMAP support; your IMAP accounts are "
6068                           "disabled.\n\n"
6069                           "You probably need to "
6070                           "install libetpan and recompile "
6071                           "Claws Mail."));
6072         }
6073         return NULL;
6074 }
6075 static gint     imap_create_tree        (Folder         *folder)
6076 {
6077         return -1;
6078 }
6079 static FolderItem *imap_create_folder   (Folder         *folder,
6080                                          FolderItem     *parent,
6081                                          const gchar    *name)
6082 {
6083         return NULL;
6084 }
6085 static gint     imap_rename_folder      (Folder         *folder,
6086                                          FolderItem     *item,
6087                                          const gchar    *name)
6088 {
6089         return -1;
6090 }
6091
6092 gchar imap_get_path_separator_for_item(FolderItem *item)
6093 {
6094         return '/';
6095 }
6096
6097 FolderClass *imap_get_class(void)
6098 {
6099         if (imap_class.idstr == NULL) {
6100                 imap_class.type = F_IMAP;
6101                 imap_class.idstr = "imap";
6102                 imap_class.uistr = "IMAP";
6103
6104                 imap_class.new_folder = imap_folder_new;
6105                 imap_class.create_tree = imap_create_tree;
6106                 imap_class.create_folder = imap_create_folder;
6107                 imap_class.rename_folder = imap_rename_folder;
6108
6109                 imap_class.set_xml = folder_set_xml;
6110                 imap_class.get_xml = folder_get_xml;
6111                 imap_class.item_set_xml = imap_item_set_xml;
6112                 imap_class.item_get_xml = imap_item_get_xml;
6113                 /* nothing implemented */
6114         }
6115
6116         return &imap_class;
6117 }
6118
6119 void imap_disconnect_all(gboolean have_connectivity)
6120 {
6121 }
6122
6123 gint imap_subscribe(Folder *folder, FolderItem *item, gchar *rpath, gboolean sub)
6124 {
6125         return -1;
6126 }
6127
6128 GList * imap_scan_subtree(Folder *folder, FolderItem *item, gboolean unsubs_only, gboolean recursive)
6129 {
6130         return NULL;
6131 }
6132
6133 void imap_cache_msg(FolderItem *item, gint msgnum)
6134 {
6135 }
6136
6137 void imap_cancel_all(void)
6138 {
6139 }
6140
6141 gboolean imap_cancel_all_enabled(void)
6142 {
6143         return FALSE;
6144 }
6145
6146 #endif
6147
6148 #ifdef HAVE_LIBETPAN
6149 static void imap_synchronise(FolderItem *item, gint days)
6150 {
6151         if (IMAP_FOLDER_ITEM(item)->last_sync == IMAP_FOLDER_ITEM(item)->last_change) {
6152                 debug_print("%s already synced\n", item->path?item->path:item->name);
6153                 return;
6154         }
6155         debug_print("syncing %s\n", item->path?item->path:item->name);
6156         imap_gtk_synchronise(item, days);
6157         IMAP_FOLDER_ITEM(item)->last_sync = IMAP_FOLDER_ITEM(item)->last_change;
6158 }
6159 #endif
6160
6161 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag)
6162 {
6163 #ifdef HAVE_LIBETPAN
6164         GList *cur;
6165 #endif
6166         folder_item_set_xml(folder, item, tag);
6167
6168 #ifdef HAVE_LIBETPAN
6169         for (cur = tag->attr; cur != NULL; cur = g_list_next(cur)) {
6170                 XMLAttr *attr = (XMLAttr *) cur->data;
6171
6172                 if (!attr || !attr->name || !attr->value) continue;
6173                 if (!strcmp(attr->name, "uidnext"))
6174                         IMAP_FOLDER_ITEM(item)->uid_next = atoi(attr->value);
6175                 if (!strcmp(attr->name, "last_sync"))
6176                         IMAP_FOLDER_ITEM(item)->last_sync = atoi(attr->value);
6177                 if (!strcmp(attr->name, "last_change"))
6178                         IMAP_FOLDER_ITEM(item)->last_change = atoi(attr->value);
6179         }
6180         if (IMAP_FOLDER_ITEM(item)->last_change == 0)
6181                 IMAP_FOLDER_ITEM(item)->last_change = time(NULL);
6182 #endif
6183 }
6184
6185 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item)
6186 {
6187         XMLTag *tag;
6188
6189         tag = folder_item_get_xml(folder, item);
6190
6191 #ifdef HAVE_LIBETPAN
6192         xml_tag_add_attr(tag, xml_attr_new_int("uidnext",
6193                         IMAP_FOLDER_ITEM(item)->uid_next));
6194         xml_tag_add_attr(tag, xml_attr_new_int("last_sync",
6195                         IMAP_FOLDER_ITEM(item)->last_sync));
6196         xml_tag_add_attr(tag, xml_attr_new_int("last_change",
6197                         IMAP_FOLDER_ITEM(item)->last_change));
6198
6199 #endif
6200         return tag;
6201 }
6202
6203 /* ===================================================================
6204  * UTF-7 conversion routines as in RFC 2192
6205  * ===================================================================
6206  * These two functions from:
6207  * libimap library.
6208  * Copyright (C) 2003-2004 Pawel Salek. */
6209
6210 /* UTF7 modified base64 alphabet */
6211 static char base64chars[] =
6212   "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+,";
6213 #define UNDEFINED 64
6214
6215 /* UTF16 definitions */
6216 #define UTF16MASK       0x03FFUL
6217 #define UTF16SHIFT      10
6218 #define UTF16BASE       0x10000UL
6219 #define UTF16HIGHSTART  0xD800UL
6220 #define UTF16HIGHEND    0xDBFFUL
6221 #define UTF16LOSTART    0xDC00UL
6222 #define UTF16LOEND      0xDFFFUL
6223
6224
6225 /* Convert an IMAP mailbox to a UTF-8 string.
6226  *  dst needs to have roughly 4 times the storage space of src
6227  *    Hex encoding can triple the size of the input
6228  *    UTF-7 can be slightly denser than UTF-8
6229  *     (worst case: 8 octets UTF-7 becomes 9 octets UTF-8)
6230  */
6231 char* imap_modified_utf7_to_utf8(const char *mbox, gboolean change_spaces)
6232 {
6233   unsigned c, i, bitcount;
6234   unsigned long ucs4, utf16, bitbuf;
6235   unsigned char base64[256];
6236   const char *src;
6237   char *dst, *res  = g_malloc(2*strlen(mbox)+1);
6238
6239   dst = res;
6240   src = mbox;
6241   if(!dst) return NULL;
6242   /* initialize modified base64 decoding table */
6243   memset(base64, UNDEFINED, sizeof (base64));
6244   for (i = 0; i < sizeof (base64chars); ++i) {
6245     base64[(unsigned)base64chars[i]] = i;
6246   }
6247
6248   /* loop until end of string */
6249   while (*src != '\0') {
6250     c = *src++;
6251     /* deal with literal characters and &- */
6252     if (c != '&' || *src == '-') {
6253       /* encode literally */
6254       if (change_spaces && c == '_')
6255         *dst++ = ' ';
6256       else
6257         *dst++ = c;
6258       /* skip over the '-' if this is an &- sequence */
6259       if (c == '&') ++src;
6260     } else {
6261       /* convert modified UTF-7 -> UTF-16 -> UCS-4 -> UTF-8 -> HEX */
6262       bitbuf = 0;
6263       bitcount = 0;
6264       ucs4 = 0;
6265       while ((c = base64[(unsigned char) *src]) != UNDEFINED) {
6266         ++src;
6267         bitbuf = (bitbuf << 6) | c;
6268         bitcount += 6;
6269         /* enough bits for a UTF-16 character? */
6270         if (bitcount >= 16) {
6271           bitcount -= 16;
6272           utf16 = (bitcount ? bitbuf >> bitcount
6273                    : bitbuf) & 0xffff;
6274           /* convert UTF16 to UCS4 */
6275           if
6276             (utf16 >= UTF16HIGHSTART && utf16 <= UTF16HIGHEND) {
6277             ucs4 = (utf16 - UTF16HIGHSTART) << UTF16SHIFT;
6278             continue;
6279           } else if
6280             (utf16 >= UTF16LOSTART && utf16 <= UTF16LOEND) {
6281             ucs4 += utf16 - UTF16LOSTART + UTF16BASE;
6282           } else {
6283             ucs4 = utf16;
6284           }
6285
6286           /* convert UTF-16 range of UCS4 to UTF-8 */
6287           if (ucs4 <= 0x7fUL) {
6288             dst[0] = ucs4;
6289             dst += 1;
6290           } else if (ucs4 <= 0x7ffUL) {
6291             dst[0] = 0xc0 | (ucs4 >> 6);
6292             dst[1] = 0x80 | (ucs4 & 0x3f);
6293             dst += 2;
6294           } else if (ucs4 <= 0xffffUL) {
6295             dst[0] = 0xe0 | (ucs4 >> 12);
6296             dst[1] = 0x80 | ((ucs4 >> 6) & 0x3f);
6297             dst[2] = 0x80 | (ucs4 & 0x3f);
6298             dst += 3;
6299           } else {
6300             dst[0] = 0xf0 | (ucs4 >> 18);
6301             dst[1] = 0x80 | ((ucs4 >> 12) & 0x3f);
6302             dst[2] = 0x80 | ((ucs4 >> 6) & 0x3f);
6303             dst[3] = 0x80 | (ucs4 & 0x3f);
6304             dst += 4;
6305           }
6306         }
6307       }
6308       /* skip over trailing '-' in modified UTF-7 encoding */
6309       if (*src == '-') ++src;
6310     }
6311   }
6312   /* terminate destination string */
6313   *dst = '\0';
6314   return res;
6315 }
6316
6317 /* Convert hex coded UTF-8 string to modified UTF-7 IMAP mailbox
6318  *  dst should be about twice the length of src to deal with non-hex
6319  *  coded URLs
6320  */
6321 char* imap_utf8_to_modified_utf7(const char *src, gboolean change_spaces)
6322 {
6323   unsigned int utf8pos, utf8total, c, utf7mode, bitstogo, utf16flag;
6324   unsigned long ucs4 = 0, bitbuf = 0;
6325
6326   /* initialize hex lookup table */
6327   char *dst, *res;
6328
6329   if (!src) return NULL;
6330
6331   res = malloc(2*strlen(src)+1);
6332   dst = res;
6333   if(!dst) return NULL;
6334
6335   utf7mode = 0;
6336   utf8total = 0;
6337   bitstogo = 0;
6338   utf8pos = 0;
6339   while ((c = (unsigned char)*src) != '\0') {
6340     ++src;
6341     /* normal character? */
6342     if (c >= ' ' && c <= '~' && (c != '_' || !change_spaces)) {
6343       /* switch out of UTF-7 mode */
6344       if (utf7mode) {
6345         if (bitstogo) {
6346           *dst++ = base64chars[(bitbuf << (6 - bitstogo)) & 0x3F];
6347         }
6348         *dst++ = '-';
6349         utf7mode = 0;
6350         utf8pos  = 0;
6351         bitstogo = 0;
6352         utf8total= 0;
6353       }
6354       if (change_spaces && c == ' ')
6355         *dst++ = '_';
6356       else
6357         *dst++ = c;
6358       /* encode '&' as '&-' */
6359       if (c == '&') {
6360         *dst++ = '-';
6361       }
6362       continue;
6363     }
6364     /* switch to UTF-7 mode */
6365     if (!utf7mode) {
6366       *dst++ = '&';
6367       utf7mode = 1;
6368     }
6369     /* Encode US-ASCII characters as themselves */
6370     if (c < 0x80) {
6371       ucs4 = c;
6372     } else if (utf8total) {
6373       /* save UTF8 bits into UCS4 */
6374       ucs4 = (ucs4 << 6) | (c & 0x3FUL);
6375       if (++utf8pos < utf8total) {
6376         continue;
6377       }
6378     } else {
6379       utf8pos = 1;
6380       if (c < 0xE0) {
6381         utf8total = 2;
6382         ucs4 = c & 0x1F;
6383       } else if (c < 0xF0) {
6384         utf8total = 3;
6385         ucs4 = c & 0x0F;
6386       } else {
6387         /* NOTE: can't convert UTF8 sequences longer than 4 */
6388         utf8total = 4;
6389         ucs4 = c & 0x03;
6390       }
6391       continue;
6392     }
6393     /* loop to split ucs4 into two utf16 chars if necessary */
6394     utf8total = 0;
6395     do {
6396       if (ucs4 >= UTF16BASE) {
6397         ucs4 -= UTF16BASE;
6398         bitbuf = (bitbuf << 16) | ((ucs4 >> UTF16SHIFT)
6399                                    + UTF16HIGHSTART);
6400         ucs4 = (ucs4 & UTF16MASK) + UTF16LOSTART;
6401         utf16flag = 1;
6402       } else {
6403         bitbuf = (bitbuf << 16) | ucs4;
6404         utf16flag = 0;
6405       }
6406       bitstogo += 16;
6407       /* spew out base64 */
6408       while (bitstogo >= 6) {
6409         bitstogo -= 6;
6410         *dst++ = base64chars[(bitstogo ? (bitbuf >> bitstogo)
6411                               : bitbuf)
6412                              & 0x3F];
6413       }
6414     } while (utf16flag);
6415   }
6416   /* if in UTF-7 mode, finish in ASCII */
6417   if (utf7mode) {
6418     if (bitstogo) {
6419       *dst++ = base64chars[(bitbuf << (6 - bitstogo)) & 0x3F];
6420     }
6421     *dst++ = '-';
6422   }
6423   /* tie off string */
6424   *dst = '\0';
6425   return res;
6426 }