src/imap.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2014 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
  20 #ifdef HAVE_CONFIG_H
  21 #  include "config.h"
  22 #include "claws-features.h"
  23 #endif
  24
  25 #include "defs.h"
  26
  27 #include <glib.h>
  28 #include <glib/gi18n.h>
  29 #include <stdio.h>
  30 #include <string.h>
  31 #include "imap.h"
  32 #include "imap_gtk.h"
  33 #include "inc.h"
  34 #include "xml.h"
  35 #include "alertpanel.h"
  36
  37 #ifdef HAVE_LIBETPAN
  38
  39 #include <stdlib.h>
  40 #include <dirent.h>
  41 #include <unistd.h>
  42 #include <ctype.h>
  43 #include <time.h>
  44 #include <errno.h>
  45 #if HAVE_ICONV
  46 #  include <iconv.h>
  47 #endif
  48
  49 #ifdef USE_GNUTLS
  50 #  include "ssl.h"
  51 #endif
  52
  53 #include "folder.h"
  54 #include "session.h"
  55 #include "procmsg.h"
  56 #include "socket.h"
  57 #include "recv.h"
  58 #include "procheader.h"
  59 #include "prefs_account.h"
  60 #include "codeconv.h"
  61 #include "md5.h"
  62 #include "utils.h"
  63 #include "prefs_common.h"
  64 #include "inputdialog.h"
  65 #include "log.h"
  66 #include "remotefolder.h"
  67 #include "claws.h"
  68 #include "statusbar.h"
  69 #include "msgcache.h"
  70 #include "imap-thread.h"
  71 #include "account.h"
  72 #include "tags.h"
  73 #include "main.h"
  74 #include "password.h"
  75
  76 typedef struct _IMAPFolder      IMAPFolder;
  77 typedef struct _IMAPSession     IMAPSession;
  78 typedef struct _IMAPNameSpace   IMAPNameSpace;
  79 typedef struct _IMAPFolderItem  IMAPFolderItem;
  80
  81 #include "prefs_account.h"
  82
  83 #define IMAP_FOLDER(obj)        ((IMAPFolder *)obj)
  84 #define IMAP_FOLDER_ITEM(obj)   ((IMAPFolderItem *)obj)
  85 #define IMAP_SESSION(obj)       ((IMAPSession *)obj)
  86
  87 struct _IMAPFolder
  88 {
  89         RemoteFolder rfolder;
  90
  91         /* list of IMAPNameSpace */
  92         GList *ns_personal;
  93         GList *ns_others;
  94         GList *ns_shared;
  95         gchar last_seen_separator;
  96         guint refcnt;
  97         guint max_set_size;
  98         gchar *search_charset;
  99         gboolean search_charset_supported;
 100 };
 101
 102 struct _IMAPSession
 103 {
 104         Session session;
 105
 106         gboolean authenticated;
 107
 108         GSList *capability;
 109         gboolean uidplus;
 110
 111         gchar *mbox;
 112         guint cmd_count;
 113
 114         /* CLAWS */
 115         gboolean folder_content_changed;
 116         guint exists;
 117         guint recent;
 118         guint expunge;
 119         guint unseen;
 120         guint uid_validity;
 121         guint uid_next;
 122
 123         Folder * folder;
 124         gboolean busy;
 125         gboolean cancelled;
 126         gboolean sens_update_block;
 127         gboolean do_destroy;
 128 };
 129
 130 struct _IMAPNameSpace
 131 {
 132         gchar *name;
 133         gchar separator;
 134 };
 135
 136 #define IMAPBUFSIZE     8192
 137
 138 #define IMAP_IS_SEEN(flags)     ((flags & IMAP_FLAG_SEEN) != 0)
 139 #define IMAP_IS_ANSWERED(flags) ((flags & IMAP_FLAG_ANSWERED) != 0)
 140 #define IMAP_IS_FLAGGED(flags)  ((flags & IMAP_FLAG_FLAGGED) != 0)
 141 #define IMAP_IS_DELETED(flags)  ((flags & IMAP_FLAG_DELETED) != 0)
 142 #define IMAP_IS_DRAFT(flags)    ((flags & IMAP_FLAG_DRAFT) != 0)
 143 #define IMAP_IS_FORWARDED(flags)        ((flags & IMAP_FLAG_FORWARDED) != 0)
 144 #define IMAP_IS_SPAM(flags)     ((flags & IMAP_FLAG_SPAM) != 0)
 145 #define IMAP_IS_HAM(flags)      ((flags & IMAP_FLAG_HAM) != 0)
 146
 147
 148 #define IMAP4_PORT      143
 149 #ifdef USE_GNUTLS
 150 #define IMAPS_PORT      993
 151 #endif
 152
 153 #define IMAP_CMD_LIMIT  1000
 154
 155 enum {
 156         ITEM_CAN_CREATE_FLAGS_UNKNOWN = 0,
 157         ITEM_CAN_CREATE_FLAGS,
 158         ITEM_CANNOT_CREATE_FLAGS
 159 };
 160
 161 struct _IMAPFolderItem
 162 {
 163         FolderItem item;
 164
 165         guint lastuid;
 166         guint uid_next;
 167         GSList *uid_list;
 168         gboolean batching;
 169
 170         GHashTable *flags_set_table;
 171         GHashTable *flags_unset_table;
 172         guint32 last_change;
 173         guint32 last_sync;
 174         gboolean should_update;
 175         gboolean should_trash_cache;
 176         gint can_create_flags;
 177
 178         GHashTable *tags_set_table;
 179         GHashTable *tags_unset_table;
 180         GSList *ok_flags;
 181
 182 };
 183
 184 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item);
 185 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag);
 186
 187 static void imap_folder_init            (Folder         *folder,
 188                                          const gchar    *name,
 189                                          const gchar    *path);
 190
 191 static Folder   *imap_folder_new        (const gchar    *name,
 192                                          const gchar    *path);
 193 static void      imap_folder_destroy    (Folder         *folder);
 194
 195 static IMAPSession *imap_session_new    (Folder         *folder,
 196                                          const PrefsAccount     *account);
 197 static gint     imap_session_authenticate(IMAPSession   *session,
 198                                           PrefsAccount  *account);
 199 static void     imap_session_destroy    (Session        *session);
 200
 201 static gchar   *imap_fetch_msg          (Folder         *folder,
 202                                          FolderItem     *item,
 203                                          gint            uid);
 204 static gchar   *imap_fetch_msg_full     (Folder         *folder,
 205                                          FolderItem     *item,
 206                                          gint            uid,
 207                                          gboolean        headers,
 208                                          gboolean        body);
 209 static void     imap_remove_cached_msg  (Folder         *folder,
 210                                          FolderItem     *item,
 211                                          MsgInfo        *msginfo);
 212 static gint     imap_add_msg            (Folder         *folder,
 213                                          FolderItem     *dest,
 214                                          const gchar    *file,
 215                                          MsgFlags       *flags);
 216 static gint     imap_add_msgs           (Folder         *folder,
 217                                          FolderItem     *dest,
 218                                          GSList         *file_list,
 219                                          GHashTable     *relation);
 220
 221 static gint     imap_copy_msg           (Folder         *folder,
 222                                          FolderItem     *dest,
 223                                          MsgInfo        *msginfo);
 224 static gint     imap_copy_msgs          (Folder         *folder,
 225                                          FolderItem     *dest,
 226                                          MsgInfoList    *msglist,
 227                                          GHashTable     *relation);
 228
 229 static gint     search_msgs             (Folder                 *folder,
 230                                          FolderItem             *container,
 231                                          MsgNumberList          **msgs,
 232                                          gboolean               *on_server,
 233                                          MatcherList            *predicate,
 234                                          SearchProgressNotify   progress_cb,
 235                                          gpointer               progress_data);
 236
 237 static gint     imap_remove_msg         (Folder         *folder,
 238                                          FolderItem     *item,
 239                                          gint            uid);
 240 static gint     imap_remove_msgs        (Folder         *folder,
 241                                          FolderItem     *dest,
 242                                          MsgInfoList    *msglist,
 243                                          GHashTable     *relation);
 244 static gint     imap_expunge            (Folder         *folder,
 245                                          FolderItem     *dest);
 246 static gint     imap_remove_all_msg     (Folder         *folder,
 247                                          FolderItem     *item);
 248
 249 static gboolean imap_is_msg_changed     (Folder         *folder,
 250                                          FolderItem     *item,
 251                                          MsgInfo        *msginfo);
 252
 253 static gint     imap_close              (Folder         *folder,
 254                                          FolderItem     *item);
 255
 256 static gint     imap_scan_tree          (Folder         *folder);
 257
 258 static gint     imap_create_tree        (Folder         *folder);
 259
 260 static FolderItem *imap_create_folder   (Folder         *folder,
 261                                          FolderItem     *parent,
 262                                          const gchar    *name);
 263 static gint     imap_rename_folder      (Folder         *folder,
 264                                          FolderItem     *item,
 265                                          const gchar    *name);
 266 static gint     imap_remove_folder      (Folder         *folder,
 267                                          FolderItem     *item);
 268
 269 static FolderItem *imap_folder_item_new (Folder         *folder);
 270 static void imap_folder_item_destroy    (Folder         *folder,
 271                                          FolderItem     *item);
 272
 273 static IMAPSession *imap_session_get    (Folder         *folder);
 274
 275 static gint imap_auth                   (IMAPSession    *session,
 276                                          const gchar    *user,
 277                                          const gchar    *pass,
 278                                          IMAPAuthType    type);
 279
 280 static gint imap_scan_tree_recursive    (IMAPSession    *session,
 281                                          FolderItem     *item,
 282                                          gboolean        subs_only);
 283
 284 static void imap_create_missing_folders (Folder         *folder);
 285 static FolderItem *imap_create_special_folder
 286                                         (Folder                 *folder,
 287                                          SpecialFolderItemType   stype,
 288                                          const gchar            *name);
 289
 290 static gint imap_do_copy_msgs           (Folder         *folder,
 291                                          FolderItem     *dest,
 292                                          MsgInfoList    *msglist,
 293                                          GHashTable     *relation,
 294                                          gboolean        same_dest_ok);
 295
 296 static gint imap_do_remove_msgs         (Folder         *folder,
 297                                          FolderItem     *dest,
 298                                          MsgInfoList    *msglist,
 299                                          GHashTable     *relation);
 300
 301 static void imap_delete_all_cached_messages     (FolderItem     *item);
 302 static void imap_set_batch              (Folder         *folder,
 303                                          FolderItem     *item,
 304                                          gboolean        batch);
 305 static gint imap_set_message_flags      (IMAPSession    *session,
 306                                          IMAPFolderItem *item,
 307                                          MsgNumberList  *numlist,
 308                                          IMAPFlags       flags,
 309                                          GSList         *tags,
 310                                          gboolean        is_set);
 311 static gint imap_select                 (IMAPSession    *session,
 312                                          IMAPFolder     *folder,
 313                                          FolderItem     *item,
 314                                          gint           *exists,
 315                                          gint           *recent,
 316                                          gint           *unseen,
 317                                          guint32        *uid_validity,
 318                                          gint           *can_create_flags,
 319                                          gboolean        block);
 320 static gint imap_status                 (IMAPSession    *session,
 321                                          IMAPFolder     *folder,
 322                                          const gchar    *path,
 323                                          IMAPFolderItem *item,
 324                                          gint           *messages,
 325                                          guint32        *uid_next,
 326                                          guint32        *uid_validity,
 327                                          gint           *unseen,
 328                                          gboolean        block);
 329 static void     imap_commit_tags        (FolderItem     *item,
 330                                          MsgInfo        *msginfo,
 331                                          GSList         *set_tags,
 332                                          GSList         *unset_tags);
 333
 334 static gchar imap_get_path_separator            (IMAPSession    *session,
 335                                                  IMAPFolder     *folder,
 336                                                  const gchar    *path,
 337                                                  gint           *ok);
 338 static gchar *imap_get_real_path                (IMAPSession    *session,
 339                                                  IMAPFolder     *folder,
 340                                                  const gchar    *path,
 341                                                  gint           *ok);
 342 #ifdef HAVE_LIBETPAN
 343 static void imap_synchronise            (FolderItem     *item, gint days);
 344 #endif
 345 static gboolean imap_is_busy            (Folder *folder);
 346
 347 static void imap_free_capabilities      (IMAPSession    *session);
 348
 349 /* low-level IMAP4rev1 commands */
 350 static gint imap_cmd_login      (IMAPSession    *session,
 351                                  const gchar    *user,
 352                                  const gchar    *pass,
 353                                  const gchar    *type);
 354 static gint imap_cmd_noop       (IMAPSession    *session);
 355 #ifdef USE_GNUTLS
 356 static gint imap_cmd_starttls   (IMAPSession    *session);
 357 #endif
 358 static gint imap_cmd_select     (IMAPSession    *session,
 359                                  const gchar    *folder,
 360                                  gint           *exists,
 361                                  gint           *recent,
 362                                  gint           *unseen,
 363                                  guint32        *uid_validity,
 364                                  gint           *can_create_flags,
 365                                  GSList         **ok_flags,
 366                                  gboolean        block);
 367 static gint imap_cmd_close      (IMAPSession    *session);
 368 static gint imap_cmd_examine    (IMAPSession    *session,
 369                                  const gchar    *folder,
 370                                  gint           *exists,
 371                                  gint           *recent,
 372                                  gint           *unseen,
 373                                  guint32        *uid_validity,
 374                                  gboolean        block);
 375 static gint imap_cmd_create     (IMAPSession    *sock,
 376                                  const gchar    *folder);
 377 static gint imap_cmd_rename     (IMAPSession    *sock,
 378                                  const gchar    *oldfolder,
 379                                  const gchar    *newfolder);
 380 static gint imap_cmd_delete     (IMAPSession    *session,
 381                                  const gchar    *folder);
 382 static gint imap_cmd_fetch      (IMAPSession    *sock,
 383                                  guint32         uid,
 384                                  const gchar    *filename,
 385                                  gboolean        headers,
 386                                  gboolean        body);
 387 static gint imap_cmd_append     (IMAPSession    *session,
 388                                  IMAPFolderItem *item,
 389                                  const gchar    *destfolder,
 390                                  const gchar    *file,
 391                                  IMAPFlags       flags,
 392                                  guint32        *new_uid);
 393 static gint imap_cmd_copy       (IMAPSession *session,
 394                                  struct mailimap_set * set,
 395                                  const gchar *destfolder,
 396                                  struct mailimap_set ** source,
 397                                  struct mailimap_set ** dest);
 398 static gint imap_cmd_store      (IMAPSession    *session,
 399                                  IMAPFolderItem *item,
 400                                  struct mailimap_set * set,
 401                                  IMAPFlags flags,
 402                                  GSList *tags,
 403                                  int do_add);
 404 static gint imap_cmd_expunge    (IMAPSession    *session, gboolean force);
 405
 406 static void imap_path_separator_subst           (gchar          *str,
 407                                                  gchar           separator);
 408
 409 static gboolean imap_rename_folder_func         (GNode          *node,
 410                                                  gpointer        data);
 411 static gint imap_get_num_list                   (Folder         *folder,
 412                                                  FolderItem     *item,
 413                                                  GSList        **list,
 414                                                  gboolean       *old_uids_valid);
 415 static GSList *imap_get_msginfos                (Folder         *folder,
 416                                                  FolderItem     *item,
 417                                                  GSList         *msgnum_list);
 418 static MsgInfo *imap_get_msginfo                (Folder         *folder,
 419                                                  FolderItem     *item,
 420                                                  gint            num);
 421 static gboolean imap_scan_required              (Folder         *folder,
 422                                                  FolderItem     *item);
 423 static void imap_change_flags                   (Folder         *folder,
 424                                                  FolderItem     *item,
 425                                                  MsgInfo        *msginfo,
 426                                                  MsgPermFlags    newflags);
 427 static gint imap_get_flags                      (Folder         *folder,
 428                                                  FolderItem     *item,
 429                                                  MsgInfoList    *msglist,
 430                                                  GHashTable     *msgflags);
 431 static gchar *imap_folder_get_path              (Folder         *folder);
 432 static gchar *imap_item_get_path                (Folder         *folder,
 433                                                  FolderItem     *item);
 434 static MsgInfo *imap_parse_msg(const gchar *file, FolderItem *item);
 435
 436
 437 /* data types conversion libetpan <-> claws */
 438 static GSList * imap_list_from_lep(IMAPFolder * folder,
 439                                    clist * list, const gchar * real_path, gboolean all);
 440 static GSList * imap_get_lep_set_from_numlist(IMAPFolder *folder, MsgNumberList *numlist);
 441 static GSList * imap_get_lep_set_from_msglist(IMAPFolder *folder, MsgInfoList *msglist);
 442 static GSList * imap_uid_list_from_lep(clist * list, gint* length);
 443 static GSList * imap_uid_list_from_lep_tab(carray * list);
 444 static void imap_flags_hash_from_lep_uid_flags_tab(carray * list,
 445                                                    GHashTable * hash,
 446                                                    GHashTable *tags_hash);
 447 static MsgInfo *imap_envelope_from_lep(struct imap_fetch_env_info * info,
 448                                        FolderItem *item);
 449 static void imap_lep_set_free(GSList *seq_list);
 450 static struct mailimap_flag_list * imap_flag_to_lep(IMAPFolderItem *item, IMAPFlags flags, GSList *tags);
 451
 452 typedef struct _hashtable_data {
 453         GSList *msglist;
 454         IMAPFolderItem *item;
 455 } hashtable_data;
 456
 457 static FolderClass imap_class;
 458
 459 FolderClass *imap_get_class(void)
 460 {
 461         if (imap_class.idstr == NULL) {
 462                 imap_class.type = F_IMAP;
 463                 imap_class.idstr = "imap";
 464                 imap_class.uistr = "IMAP4";
 465                 imap_class.supports_server_search = TRUE;
 466
 467                 /* Folder functions */
 468                 imap_class.new_folder = imap_folder_new;
 469                 imap_class.destroy_folder = imap_folder_destroy;
 470                 imap_class.scan_tree = imap_scan_tree;
 471                 imap_class.create_tree = imap_create_tree;
 472
 473                 /* FolderItem functions */
 474                 imap_class.item_new = imap_folder_item_new;
 475                 imap_class.item_destroy = imap_folder_item_destroy;
 476                 imap_class.item_get_path = imap_item_get_path;
 477                 imap_class.create_folder = imap_create_folder;
 478                 imap_class.rename_folder = imap_rename_folder;
 479                 imap_class.remove_folder = imap_remove_folder;
 480                 imap_class.close = imap_close;
 481                 imap_class.get_num_list = imap_get_num_list;
 482                 imap_class.scan_required = imap_scan_required;
 483                 imap_class.set_xml = folder_set_xml;
 484                 imap_class.get_xml = folder_get_xml;
 485                 imap_class.item_set_xml = imap_item_set_xml;
 486                 imap_class.item_get_xml = imap_item_get_xml;
 487
 488                 /* Message functions */
 489                 imap_class.get_msginfo = imap_get_msginfo;
 490                 imap_class.get_msginfos = imap_get_msginfos;
 491                 imap_class.fetch_msg = imap_fetch_msg;
 492                 imap_class.fetch_msg_full = imap_fetch_msg_full;
 493                 imap_class.add_msg = imap_add_msg;
 494                 imap_class.add_msgs = imap_add_msgs;
 495                 imap_class.copy_msg = imap_copy_msg;
 496                 imap_class.copy_msgs = imap_copy_msgs;
 497                 imap_class.search_msgs = search_msgs;
 498                 imap_class.remove_msg = imap_remove_msg;
 499                 imap_class.remove_msgs = imap_remove_msgs;
 500                 imap_class.expunge = imap_expunge;
 501                 imap_class.remove_all_msg = imap_remove_all_msg;
 502                 imap_class.is_msg_changed = imap_is_msg_changed;
 503                 imap_class.change_flags = imap_change_flags;
 504                 imap_class.get_flags = imap_get_flags;
 505                 imap_class.set_batch = imap_set_batch;
 506                 imap_class.synchronise = imap_synchronise;
 507                 imap_class.remove_cached_msg = imap_remove_cached_msg;
 508                 imap_class.commit_tags = imap_commit_tags;
 509 #ifdef USE_PTREAD
 510                 pthread_mutex_init(&imap_mutex, NULL);
 511 #endif
 512         }
 513
 514         return &imap_class;
 515 }
 516
 517 static void imap_refresh_sensitivity (IMAPSession *session)
 518 {
 519         MainWindow *mainwin;
 520
 521         if (session->sens_update_block)
 522                 return;
 523         mainwin = mainwindow_get_mainwindow();
 524         if (mainwin) {
 525                 toolbar_main_set_sensitive(mainwin);
 526                 main_window_set_menu_sensitive(mainwin);
 527         }
 528 }
 529
 530 static void lock_session(IMAPSession *session)
 531 {
 532         if (session) {
 533                 debug_print("locking session %p (%d)\n", session, session->busy);
 534                 if (session->busy)
 535                         debug_print("         SESSION WAS LOCKED !!      \n");
 536                 session->busy = TRUE;
 537                 imap_refresh_sensitivity(session);
 538         } else {
 539                 debug_print("can't lock null session\n");
 540         }
 541 }
 542
 543 static void unlock_session(IMAPSession *session)
 544 {
 545         if (session) {
 546                 debug_print("unlocking session %p\n", session);
 547                 session->busy = FALSE;
 548                 imap_refresh_sensitivity(session);
 549         } else {
 550                 debug_print("can't unlock null session\n");
 551         }
 552 }
 553
 554 static gboolean imap_ping(gpointer data)
 555 {
 556         Session *session = (Session *)data;
 557         IMAPSession *imap_session = IMAP_SESSION(session);
 558         int r;
 559
 560         if (session->state != SESSION_READY)
 561                 return FALSE;
 562         if (imap_session->busy || !imap_session->authenticated)
 563                 return TRUE;
 564
 565         lock_session(imap_session);
 566         r = imap_cmd_noop(imap_session);
 567         unlock_session(imap_session);
 568
 569         return r == MAILIMAP_NO_ERROR;
 570 }
 571
 572 static void imap_disc_session_destroy(IMAPSession *session)
 573 {
 574         RemoteFolder *rfolder = NULL;
 575
 576         if (session == NULL)
 577                 return;
 578
 579         rfolder = REMOTE_FOLDER(IMAP_SESSION(session)->folder);
 580
 581         if (rfolder == NULL)
 582                 return;
 583         log_warning(LOG_PROTOCOL, _("IMAP4 connection broken\n"));
 584         SESSION(session)->state = SESSION_DISCONNECTED;
 585         SESSION(session)->sock = NULL;
 586 }
 587
 588 static void imap_safe_destroy(IMAPSession *session)
 589 {
 590         if (!session->busy)
 591                 session_destroy(SESSION(session));
 592         else
 593                 session->do_destroy = TRUE;
 594 }
 595
 596 static gboolean is_fatal(int libetpan_errcode)
 597 {
 598         switch(libetpan_errcode) {
 599         case MAILIMAP_ERROR_STREAM:
 600         case MAILIMAP_ERROR_PROTOCOL:
 601         case MAILIMAP_ERROR_PARSE:
 602         case MAILIMAP_ERROR_BAD_STATE:
 603                 return TRUE;
 604         default:
 605                 return FALSE;
 606         }
 607 }
 608
 609 static void imap_handle_error(Session *session, const gchar *server, int libetpan_errcode)
 610 {
 611         const gchar *session_server = (session ? session->server : NULL);
 612
 613         if (session_server == NULL)
 614                 session_server = server;
 615         if (session_server == NULL)
 616                 session_server = "(null)";
 617
 618         switch(libetpan_errcode) {
 619         case MAILIMAP_NO_ERROR:
 620                 return;
 621         case MAILIMAP_NO_ERROR_AUTHENTICATED:
 622                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("authenticated"), "\n", NULL), session_server);
 623                 break;
 624         case MAILIMAP_NO_ERROR_NON_AUTHENTICATED:
 625                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("not authenticated"), "\n", NULL), session_server);
 626                 break;
 627         case MAILIMAP_ERROR_BAD_STATE:
 628                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("bad state"), "\n", NULL), session_server);
 629                 break;
 630         case MAILIMAP_ERROR_STREAM:
 631                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("stream error"), "\n", NULL), session_server);
 632                 break;
 633         case MAILIMAP_ERROR_PARSE:
 634                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("parse error "
 635                                             "(very probably non-RFC compliance from the server)"), "\n", NULL), session_server);
 636                 break;
 637         case MAILIMAP_ERROR_CONNECTION_REFUSED:
 638                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("connection refused"), "\n", NULL), session_server);
 639                 break;
 640         case MAILIMAP_ERROR_MEMORY:
 641                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("memory error"), "\n", NULL), session_server);
 642                 break;
 643         case MAILIMAP_ERROR_FATAL:
 644                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("fatal error"), "\n", NULL), session_server);
 645                 break;
 646         case MAILIMAP_ERROR_PROTOCOL:
 647                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("protocol error "
 648                                             "(very probably non-RFC compliance from the server)"), "\n", NULL), session_server);
 649                 break;
 650         case MAILIMAP_ERROR_DONT_ACCEPT_CONNECTION:
 651                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("connection not accepted"), "\n", NULL), session_server);
 652                 break;
 653         case MAILIMAP_ERROR_APPEND:
 654                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("APPEND error"), "\n", NULL), session_server);
 655                 break;
 656         case MAILIMAP_ERROR_NOOP:
 657                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("NOOP error"), "\n", NULL), session_server);
 658                 break;
 659         case MAILIMAP_ERROR_LOGOUT:
 660                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("LOGOUT error"), "\n", NULL), session_server);
 661                 break;
 662         case MAILIMAP_ERROR_CAPABILITY:
 663                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("CAPABILITY error"), "\n", NULL), session_server);
 664                 break;
 665         case MAILIMAP_ERROR_CHECK:
 666                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("CHECK error"), "\n", NULL), session_server);
 667                 break;
 668         case MAILIMAP_ERROR_CLOSE:
 669                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("CLOSE error"), "\n", NULL), session_server);
 670                 break;
 671         case MAILIMAP_ERROR_EXPUNGE:
 672                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("EXPUNGE error"), "\n", NULL), session_server);
 673                 break;
 674         case MAILIMAP_ERROR_COPY:
 675                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("COPY error"), "\n", NULL), session_server);
 676                 break;
 677         case MAILIMAP_ERROR_UID_COPY:
 678                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("UID COPY error"), "\n", NULL), session_server);
 679                 break;
 680         case MAILIMAP_ERROR_CREATE:
 681                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("CREATE error"), "\n", NULL), session_server);
 682                 break;
 683         case MAILIMAP_ERROR_DELETE:
 684                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("DELETE error"), "\n", NULL), session_server);
 685                 break;
 686         case MAILIMAP_ERROR_EXAMINE:
 687                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("EXAMINE error"), "\n", NULL), session_server);
 688                 break;
 689         case MAILIMAP_ERROR_FETCH:
 690                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("FETCH error"), "\n", NULL), session_server);
 691                 break;
 692         case MAILIMAP_ERROR_UID_FETCH:
 693                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("UID FETCH error"), "\n", NULL), session_server);
 694                 break;
 695         case MAILIMAP_ERROR_LIST:
 696                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("LIST error"), "\n", NULL), session_server);
 697                 break;
 698         case MAILIMAP_ERROR_LOGIN:
 699                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("LOGIN error"), "\n", NULL), session_server);
 700                 break;
 701         case MAILIMAP_ERROR_LSUB:
 702                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("LSUB error"), "\n", NULL), session_server);
 703                 break;
 704         case MAILIMAP_ERROR_RENAME:
 705                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("RENAME error"), "\n", NULL), session_server);
 706                 break;
 707         case MAILIMAP_ERROR_SEARCH:
 708                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("SEARCH error"), "\n", NULL), session_server);
 709                 break;
 710         case MAILIMAP_ERROR_UID_SEARCH:
 711                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("UID SEARCH error"), "\n", NULL), session_server);
 712                 break;
 713         case MAILIMAP_ERROR_SELECT:
 714                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("SELECT error"), "\n", NULL), session_server);
 715                 break;
 716         case MAILIMAP_ERROR_STATUS:
 717                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("STATUS error"), "\n", NULL), session_server);
 718                 break;
 719         case MAILIMAP_ERROR_STORE:
 720                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("STORE error"), "\n", NULL), session_server);
 721                 break;
 722         case MAILIMAP_ERROR_UID_STORE:
 723                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("UID STORE error"), "\n", NULL), session_server);
 724                 break;
 725         case MAILIMAP_ERROR_SUBSCRIBE:
 726                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("SUBSCRIBE error"), "\n", NULL), session_server);
 727                 break;
 728         case MAILIMAP_ERROR_UNSUBSCRIBE:
 729                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("UNSUBSCRIBE error"), "\n", NULL), session_server);
 730                 break;
 731         case MAILIMAP_ERROR_STARTTLS:
 732                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("STARTTLS error"), "\n", NULL), session_server);
 733                 break;
 734         case MAILIMAP_ERROR_INVAL:
 735                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("INVAL error"), "\n", NULL), session_server);
 736                 break;
 737         case MAILIMAP_ERROR_EXTENSION:
 738                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("EXTENSION error"), "\n", NULL), session_server);
 739                 break;
 740         case MAILIMAP_ERROR_SASL:
 741                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("SASL error"), "\n", NULL), session_server);
 742                 break;
 743 #ifdef USE_GNUTLS
 744         case MAILIMAP_ERROR_SSL:
 745                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("SSL error"), "\n", NULL), session_server);
 746                 break;
 747 #endif
 748         default:
 749                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("Unknown error [%d]"), "\n", NULL),
 750                         session_server, libetpan_errcode);
 751                 break;
 752         }
 753
 754         if (session && is_fatal(libetpan_errcode)) {
 755                 imap_disc_session_destroy(IMAP_SESSION(session));
 756         } else if (session && !is_fatal(libetpan_errcode)) {
 757                 if (IMAP_SESSION(session)->busy)
 758                         unlock_session(IMAP_SESSION(session));
 759         }
 760 }
 761
 762 static Folder *imap_folder_new(const gchar *name, const gchar *path)
 763 {
 764         Folder *folder;
 765
 766         folder = (Folder *)g_new0(IMAPFolder, 1);
 767         folder->klass = &imap_class;
 768         imap_folder_init(folder, name, path);
 769
 770         return folder;
 771 }
 772
 773 static void imap_folder_destroy(Folder *folder)
 774 {
 775         while (imap_folder_get_refcnt(folder) > 0)
 776                 gtk_main_iteration();
 777
 778         g_free(IMAP_FOLDER(folder)->search_charset);
 779
 780         folder_remote_folder_destroy(REMOTE_FOLDER(folder));
 781         imap_done(folder);
 782 }
 783
 784 static void imap_folder_init(Folder *folder, const gchar *name,
 785                              const gchar *path)
 786 {
 787         folder_remote_folder_init((Folder *)folder, name, path);
 788         IMAP_FOLDER(folder)->max_set_size = IMAP_SET_MAX_COUNT;
 789         IMAP_FOLDER(folder)->search_charset_supported = TRUE;
 790         IMAP_FOLDER(folder)->search_charset = g_strdup(conv_get_locale_charset_str_no_utf8());
 791 }
 792
 793 static FolderItem *imap_folder_item_new(Folder *folder)
 794 {
 795         IMAPFolderItem *item;
 796
 797         item = g_new0(IMAPFolderItem, 1);
 798         item->lastuid = 0;
 799         item->uid_next = 0;
 800         item->uid_list = NULL;
 801
 802         return (FolderItem *)item;
 803 }
 804
 805 static void imap_folder_item_destroy(Folder *folder, FolderItem *_item)
 806 {
 807         IMAPFolderItem *item = (IMAPFolderItem *)_item;
 808
 809         g_return_if_fail(item != NULL);
 810         g_slist_free(item->uid_list);
 811
 812         g_free(_item);
 813 }
 814
 815 static gboolean imap_reset_uid_lists_func(GNode *node, gpointer data)
 816 {
 817         IMAPFolderItem *item = (IMAPFolderItem *)node->data;
 818
 819         item->lastuid = 0;
 820         g_slist_free(item->uid_list);
 821         item->uid_list = NULL;
 822
 823         return FALSE;
 824 }
 825
 826 static void imap_reset_uid_lists(Folder *folder)
 827 {
 828         if(folder->node == NULL)
 829                 return;
 830
 831         /* Destroy all uid lists and rest last uid */
 832         g_node_traverse(folder->node, G_IN_ORDER, G_TRAVERSE_ALL, -1, imap_reset_uid_lists_func, NULL);
 833 }
 834
 835 static int imap_get_capabilities(IMAPSession *session)
 836 {
 837         struct mailimap_capability_data *capabilities = NULL;
 838         clistiter *cur;
 839         int result;
 840
 841         if (session->capability != NULL)
 842                 return MAILIMAP_NO_ERROR;
 843
 844         result = imap_threaded_capability(session->folder, &capabilities);
 845
 846         if (result != MAILIMAP_NO_ERROR) {
 847                 return result;
 848         }
 849
 850         if (capabilities == NULL || capabilities->cap_list == NULL) {
 851                 return MAILIMAP_NO_ERROR;
 852         }
 853
 854         for(cur = clist_begin(capabilities->cap_list) ; cur != NULL ;
 855             cur = clist_next(cur)) {
 856                 struct mailimap_capability * cap =
 857                         clist_content(cur);
 858                 if (!cap || cap->cap_data.cap_name == NULL)
 859                         continue;
 860                 session->capability = g_slist_append
 861                                 (session->capability,
 862                                  g_strdup(cap->cap_data.cap_name));
 863                 debug_print("got capa %s\n", cap->cap_data.cap_name);
 864         }
 865         mailimap_capability_data_free(capabilities);
 866         return MAILIMAP_NO_ERROR;
 867 }
 868
 869 static gboolean imap_has_capability(IMAPSession *session, const gchar *cap)
 870 {
 871         GSList *cur;
 872         for (cur = session->capability; cur; cur = cur->next) {
 873                 if (!g_ascii_strcasecmp(cur->data, cap))
 874                         return TRUE;
 875         }
 876         return FALSE;
 877 }
 878
 879 static gint imap_auth(IMAPSession *session, const gchar *user, const gchar *pass,
 880                       IMAPAuthType type)
 881 {
 882         gint ok = MAILIMAP_ERROR_LOGIN;
 883         static time_t last_login_err = 0;
 884         gchar *ext_info = "";
 885         int r;
 886         gchar *server = NULL;
 887         if ((r = imap_get_capabilities(session)) != MAILIMAP_NO_ERROR) {
 888                 imap_handle_error(SESSION(session), NULL, r);
 889                 return r;
 890         }
 891         server = g_strdup(SESSION(session)->server);
 892         switch(type) {
 893         case IMAP_AUTH_ANON:
 894                 ok = imap_cmd_login(session, user, pass, "ANONYMOUS");
 895                 break;
 896         case IMAP_AUTH_CRAM_MD5:
 897                 ok = imap_cmd_login(session, user, pass, "CRAM-MD5");
 898                 break;
 899         case IMAP_AUTH_DIGEST_MD5:
 900                 ok = imap_cmd_login(session, user, pass, "DIGEST-MD5");
 901                 break;
 902         case IMAP_AUTH_SCRAM_SHA1:
 903                 ok = imap_cmd_login(session, user, pass, "SCRAM-SHA-1");
 904                 break;
 905         case IMAP_AUTH_PLAIN:
 906                 ok = imap_cmd_login(session, user, pass, "PLAIN");
 907                 break;
 908         case IMAP_AUTH_LOGIN:
 909                 ok = imap_cmd_login(session, user, pass, "LOGIN");
 910                 break;
 911         case IMAP_AUTH_PLAINTEXT:
 912                 ok = imap_cmd_login(session, user, pass, "plaintext");
 913                 break;
 914         case IMAP_AUTH_GSSAPI:
 915                 ok = imap_cmd_login(session, user, pass, "GSSAPI");
 916                 break;
 917         default:
 918                 debug_print("capabilities:\n"
 919                                 "\t ANONYMOUS %d\n"
 920                                 "\t CRAM-MD5 %d\n"
 921                                 "\t DIGEST-MD5 %d\n"
 922                                 "\t SCRAM-SHA-1 %d\n"
 923                                 "\t PLAIN %d\n"
 924                                 "\t LOGIN %d\n"
 925                                 "\t GSSAPI %d\n",
 926                         imap_has_capability(session, "ANONYMOUS"),
 927                         imap_has_capability(session, "CRAM-MD5"),
 928                         imap_has_capability(session, "DIGEST-MD5"),
 929                         imap_has_capability(session, "SCRAM-SHA-1"),
 930                         imap_has_capability(session, "PLAIN"),
 931                         imap_has_capability(session, "LOGIN"),
 932                         imap_has_capability(session, "GSSAPI"));
 933                 if (imap_has_capability(session, "CRAM-MD5"))
 934                         ok = imap_cmd_login(session, user, pass, "CRAM-MD5");
 935                 if (ok == MAILIMAP_ERROR_LOGIN && imap_has_capability(session, "DIGEST-MD5"))
 936                         ok = imap_cmd_login(session, user, pass, "DIGEST-MD5");
 937                 if (ok == MAILIMAP_ERROR_LOGIN && imap_has_capability(session, "SCRAM-SHA-1"))
 938                         ok = imap_cmd_login(session, user, pass, "SCRAM-SHA-1");
 939                 if (ok == MAILIMAP_ERROR_LOGIN && imap_has_capability(session, "PLAIN"))
 940                         ok = imap_cmd_login(session, user, pass, "PLAIN");
 941                 if (ok == MAILIMAP_ERROR_LOGIN && imap_has_capability(session, "LOGIN"))
 942                         ok = imap_cmd_login(session, user, pass, "LOGIN");
 943                 if (ok == MAILIMAP_ERROR_LOGIN && imap_has_capability(session, "GSSAPI"))
 944                         ok = imap_cmd_login(session, user, pass, "GSSAPI");
 945                 if (ok == MAILIMAP_ERROR_LOGIN) /* we always try plaintext login before giving up */
 946                         ok = imap_cmd_login(session, user, pass, "plaintext");
 947         }
 948
 949         if (ok == MAILIMAP_NO_ERROR)
 950                 session->authenticated = TRUE;
 951         else {
 952                 if (type == IMAP_AUTH_CRAM_MD5) {
 953                         ext_info = _("\n\nCRAM-MD5 logins only work if libetpan has been "
 954                                      "compiled with SASL support and the "
 955                                      "CRAM-MD5 SASL plugin is installed.");
 956                 }
 957
 958                 if (type == IMAP_AUTH_DIGEST_MD5) {
 959                         ext_info = _("\n\nDIGEST-MD5 logins only work if libetpan has been "
 960                                      "compiled with SASL support and the "
 961                                      "DIGEST-MD5 SASL plugin is installed.");
 962                 }
 963
 964                 if (type == IMAP_AUTH_SCRAM_SHA1) {
 965                         ext_info = _("\n\nSCRAM-SHA-1 logins only work if libetpan has been "
 966                                      "compiled with SASL support and the "
 967                                      "SCRAM SASL plugin is installed.");
 968                 }
 969
 970                 if (type == IMAP_AUTH_PLAIN) {
 971                         ext_info = _("\n\nPLAIN logins only work if libetpan has been "
 972                                      "compiled with SASL support and the "
 973                                      "PLAIN SASL plugin is installed.");
 974                 }
 975
 976                 if (time(NULL) - last_login_err > 10) {
 977                         if (!prefs_common.no_recv_err_panel) {
 978                                 alertpanel_error_log(_("Connection to %s failed: "
 979                                         "login refused.%s"),
 980                                         server, ext_info);
 981                         } else {
 982                                 log_error(LOG_PROTOCOL, _("Connection to %s failed: "
 983                                         "login refused.%s\n"),
 984                                         server, ext_info);
 985                         }
 986                 }
 987                 last_login_err = time(NULL);
 988         }
 989         g_free(server);
 990         return ok;
 991 }
 992
 993 static IMAPSession *imap_reconnect_if_possible(Folder *folder, IMAPSession *session)
 994 {
 995         RemoteFolder *rfolder = REMOTE_FOLDER(folder);
 996         /* Check if this is the first try to establish a
 997            connection, if yes we don't try to reconnect */
 998         debug_print("reconnecting\n");
 999         if (rfolder->session == NULL) {
1000                 log_warning(LOG_PROTOCOL, _("Connecting to %s failed"),
1001                             folder->account->recv_server);
1002                 SESSION(session)->sock = NULL;
1003                 imap_safe_destroy(session);
1004                 session = NULL;
1005         } else {
1006                 rfolder->session = NULL;
1007                 log_warning(LOG_PROTOCOL, _("IMAP4 connection to %s has been"
1008                             " disconnected. Reconnecting...\n"),
1009                             folder->account->recv_server);
1010                 statusbar_print_all(_("IMAP4 connection to %s has been"
1011                             " disconnected. Reconnecting...\n"),
1012                             folder->account->recv_server);
1013                 SESSION(session)->state = SESSION_DISCONNECTED;
1014                 SESSION(session)->sock = NULL;
1015                 imap_safe_destroy(session);
1016                 /* Clear folders session to make imap_session_get create
1017                    a new session, because of rfolder->session == NULL
1018                    it will not try to reconnect again and so avoid an
1019                    endless loop */
1020                 debug_print("getting session...\n");
1021                 session = imap_session_get(folder);
1022                 rfolder->session = SESSION(session);
1023                 statusbar_pop_all();
1024         }
1025         return session;
1026 }
1027
1028 static IMAPSession *imap_session_get(Folder *folder)
1029 {
1030         RemoteFolder *rfolder = REMOTE_FOLDER(folder);
1031         IMAPSession *session = NULL;
1032         gint r = MAILIMAP_NO_ERROR;
1033
1034         g_return_val_if_fail(folder != NULL, NULL);
1035         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, NULL);
1036         g_return_val_if_fail(folder->account != NULL, NULL);
1037
1038         if (prefs_common.work_offline &&
1039             !inc_offline_should_override(FALSE,
1040                 _("Claws Mail needs network access in order "
1041                   "to access the IMAP server."))) {
1042                 return NULL;
1043         }
1044
1045         /* check for deferred destroy */
1046         if (rfolder->session != NULL) {
1047                 session = IMAP_SESSION(rfolder->session);
1048                 if (!session->busy && session->do_destroy) {
1049                         rfolder->session = NULL;
1050                         imap_safe_destroy(session);
1051                         session = NULL;
1052                 }
1053         }
1054
1055         /* Make sure we have a session */
1056         if (rfolder->session != NULL && rfolder->session->state != SESSION_DISCONNECTED) {
1057                 session = IMAP_SESSION(rfolder->session);
1058         } else if (rfolder->session != NULL && rfolder->session->state == SESSION_DISCONNECTED) {
1059                 imap_safe_destroy(IMAP_SESSION(rfolder->session));
1060                 rfolder->session = NULL;
1061                 goto new_conn;
1062         } else if (rfolder->connecting) {
1063                 debug_print("already connecting\n");
1064                 return NULL;
1065         } else {
1066 new_conn:
1067                 imap_reset_uid_lists(folder);
1068                 if (time(NULL) - rfolder->last_failure <= 2)
1069                         return NULL;
1070                 rfolder->connecting = TRUE;
1071                 session = imap_session_new(folder, folder->account);
1072         }
1073         if(session == NULL) {
1074                 rfolder->last_failure = time(NULL);
1075                 rfolder->connecting = FALSE;
1076                 return NULL;
1077         }
1078
1079         /* Make sure session is authenticated */
1080         if (!IMAP_SESSION(session)->authenticated)
1081                 r = imap_session_authenticate(IMAP_SESSION(session), folder->account);
1082
1083         if (r != MAILIMAP_NO_ERROR || (!is_fatal(r) && !IMAP_SESSION(session)->authenticated)) {
1084                 rfolder->session = NULL;
1085                 if (!is_fatal(r)) {
1086                         imap_threaded_disconnect(session->folder);
1087                 }
1088                 SESSION(session)->state = SESSION_DISCONNECTED;
1089                 SESSION(session)->sock = NULL;
1090                 imap_safe_destroy(session);
1091                 rfolder->last_failure = time(NULL);
1092                 rfolder->connecting = FALSE;
1093                 return NULL;
1094         }
1095
1096         /* I think the point of this code is to avoid sending a
1097          * keepalive if we've used the session recently and therefore
1098          * think it's still alive.  Unfortunately, most of the code
1099          * does not yet check for errors on the socket, and so if the
1100          * connection drops we don't notice until the timeout expires.
1101          * A better solution than sending a NOOP every time would be
1102          * for every command to be prepared to retry until it is
1103          * successfully sent. -- mbp */
1104         if ((time(NULL) - SESSION(session)->last_access_time > SESSION_TIMEOUT_INTERVAL) || session->cancelled) {
1105                 /* verify that the session is still alive */
1106                 r = imap_cmd_noop(session);
1107
1108                 if (r != MAILIMAP_NO_ERROR) {
1109                         debug_print("disconnected!\n");
1110                         if (!is_fatal(r))
1111                                 session = imap_reconnect_if_possible(folder, session);
1112                         else {
1113                                 rfolder->session = NULL;
1114                                 rfolder->connecting = FALSE;
1115                                 SESSION(session)->state = SESSION_DISCONNECTED;
1116                                 SESSION(session)->sock = NULL;
1117                                 imap_safe_destroy(session);
1118                                 session = imap_session_get(folder);
1119                         }
1120                 }
1121                 if (session)
1122                         session->cancelled = FALSE;
1123         }
1124
1125         rfolder->session = SESSION(session);
1126         rfolder->connecting = FALSE;
1127
1128         return IMAP_SESSION(session);
1129 }
1130
1131 static IMAPSession *imap_session_new(Folder * folder,
1132                                      const PrefsAccount *account)
1133 {
1134         IMAPSession *session;
1135         gushort port;
1136         int r;
1137         int authenticated = FALSE;
1138         gchar *buf;
1139
1140 #ifdef USE_GNUTLS
1141         /* FIXME: IMAP over SSL only... */
1142         SSLType ssl_type;
1143
1144         port = account->set_imapport ? account->imapport
1145                 : account->ssl_imap == SSL_TUNNEL ? IMAPS_PORT : IMAP4_PORT;
1146         ssl_type = account->ssl_imap;
1147 #else
1148         if (account->ssl_imap != SSL_NONE) {
1149                 if (alertpanel_full(_("Insecure connection"),
1150                         _("This connection is configured to be secured "
1151                           "using SSL, but SSL is not available in this "
1152                           "build of Claws Mail. \n\n"
1153                           "Do you want to continue connecting to this "
1154                           "server? The communication would not be "
1155                           "secure."),
1156                           GTK_STOCK_CANCEL, _("Con_tinue connecting"),
1157                           NULL, FALSE, NULL, ALERT_WARNING,
1158                           G_ALERTDEFAULT) != G_ALERTALTERNATE)
1159                         return NULL;
1160         }
1161         port = account->set_imapport ? account->imapport
1162                 : IMAP4_PORT;
1163 #endif
1164
1165         imap_init(folder);
1166         buf = g_strdup_printf(_("Account '%s': Connecting to IMAP4 server: %s:%d..."),
1167                                 folder->account->account_name, folder->account->recv_server,
1168                                 port);
1169         statuswindow_print_all("%s", buf);
1170         log_message(LOG_PROTOCOL, "%s\n", buf);
1171         g_free(buf);
1172
1173 #ifndef G_OS_WIN32
1174         if (account->set_tunnelcmd) {
1175                 r = imap_threaded_connect_cmd(folder,
1176                                               account->tunnelcmd,
1177                                               account->recv_server,
1178                                               port);
1179         }
1180         else
1181 #endif
1182         {
1183 #ifdef USE_GNUTLS
1184                 if (ssl_type == SSL_TUNNEL) {
1185                         r = imap_threaded_connect_ssl(folder,
1186                                                       account->recv_server,
1187                                                       port);
1188                 }
1189                 else
1190 #endif
1191                 {
1192                         r = imap_threaded_connect(folder,
1193                                                   account->recv_server,
1194                                                   port);
1195                 }
1196         }
1197
1198         statuswindow_pop_all();
1199         if (r == MAILIMAP_NO_ERROR_AUTHENTICATED) {
1200                 authenticated = TRUE;
1201         }
1202         else if (r == MAILIMAP_NO_ERROR_NON_AUTHENTICATED) {
1203                 authenticated = FALSE;
1204         }
1205         else {
1206 #ifdef USE_GNUTLS
1207                 if (r == MAILIMAP_ERROR_SSL)
1208                         log_error(LOG_PROTOCOL, _("SSL handshake failed\n"));
1209                 else
1210 #endif
1211                         imap_handle_error(NULL, account->recv_server, r);
1212
1213                 if(!prefs_common.no_recv_err_panel) {
1214                         alertpanel_error_log(_("Can't connect to IMAP4 server: %s:%d"),
1215                                          account->recv_server, port);
1216                 } else {
1217                         log_error(LOG_PROTOCOL, _("Can't connect to IMAP4 server: %s:%d\n"),
1218                                          account->recv_server, port);
1219                 }
1220
1221                 return NULL;
1222         }
1223
1224         session = g_new0(IMAPSession, 1);
1225         session_init(SESSION(session), account, FALSE);
1226         SESSION(session)->type             = SESSION_IMAP;
1227         SESSION(session)->server           = g_strdup(account->recv_server);
1228         SESSION(session)->port             = port;
1229         SESSION(session)->sock             = NULL;
1230
1231         SESSION(session)->destroy          = imap_session_destroy;
1232
1233         session->capability = NULL;
1234
1235         session->authenticated = authenticated;
1236         session->mbox = NULL;
1237         session->exists = 0;
1238         session->recent = 0;
1239         session->expunge = 0;
1240         session->cmd_count = 0;
1241         session->folder = folder;
1242         IMAP_FOLDER(session->folder)->last_seen_separator = 0;
1243
1244 #ifdef USE_GNUTLS
1245         if (account->ssl_imap == SSL_STARTTLS) {
1246                 gint ok;
1247
1248                 ok = imap_cmd_starttls(session);
1249                 if (ok != MAILIMAP_NO_ERROR) {
1250                         log_warning(LOG_PROTOCOL, _("Can't start TLS session.\n"));
1251                         if (!is_fatal(ok)) {
1252                                 SESSION(session)->sock = NULL;
1253                                 imap_safe_destroy(session);
1254                         }
1255                         return NULL;
1256                 }
1257
1258                 imap_free_capabilities(session);
1259                 session->authenticated = FALSE;
1260                 session->uidplus = FALSE;
1261                 session->cmd_count = 1;
1262         }
1263 #endif
1264         log_message(LOG_PROTOCOL, "IMAP connection is %s-authenticated\n",
1265                     (session->authenticated) ? "pre" : "un");
1266
1267         session_register_ping(SESSION(session), imap_ping);
1268
1269         return session;
1270 }
1271
1272 static gint imap_session_authenticate(IMAPSession *session,
1273                                       PrefsAccount *account)
1274 {
1275         gchar *pass, *acc_pass;
1276         gboolean failed = FALSE;
1277         gint ok = MAILIMAP_NO_ERROR;
1278         g_return_val_if_fail(account->userid != NULL, MAILIMAP_ERROR_BAD_STATE);
1279
1280         if (password_get(account->userid, account->recv_server, "imap",
1281                          SESSION(session)->port, &pass)) {
1282                 Xstrdup_a(acc_pass, pass, {g_free(pass); return MAILIMAP_NO_ERROR;});
1283                 g_free(pass);
1284         } else {
1285                 acc_pass = password_decrypt(account->passwd, NULL);
1286         }
1287 try_again:
1288         pass = acc_pass;
1289         if (!pass && account->imap_auth_type != IMAP_AUTH_ANON && account->imap_auth_type != IMAP_AUTH_GSSAPI) {
1290                 gchar *tmp_pass;
1291                 tmp_pass = input_dialog_query_password_keep(account->recv_server,
1292                                                             account->userid,
1293                                                             &(account->session_passwd));
1294                 if (!tmp_pass) {
1295                         return MAILIMAP_NO_ERROR;
1296                 }
1297                 Xstrdup_a(pass, tmp_pass, {g_free(tmp_pass); return MAILIMAP_NO_ERROR;});
1298                 g_free(tmp_pass);
1299         } else if (account->imap_auth_type == IMAP_AUTH_ANON || account->imap_auth_type == IMAP_AUTH_GSSAPI) {
1300                 pass = "";
1301         }
1302         if ((ok = imap_auth(session, account->userid, pass, account->imap_auth_type)) != MAILIMAP_NO_ERROR) {
1303
1304                 if (!failed && !is_fatal(ok)) {
1305                         if (acc_pass != NULL) {
1306                                 memset(acc_pass, 0, strlen(acc_pass));
1307                                 g_free(acc_pass);
1308                                 acc_pass = NULL;
1309                         }
1310                         failed = TRUE;
1311                         if (account->session_passwd != NULL) {
1312                                 g_free(account->session_passwd);
1313                                 account->session_passwd = NULL;
1314                         }
1315                         goto try_again;
1316                 } else {
1317                         if (prefs_common.no_recv_err_panel) {
1318                                 log_error(LOG_PROTOCOL, _("Couldn't login to IMAP server %s.\n"), account->recv_server);
1319                                 mainwindow_show_error();
1320                         } else
1321                                 alertpanel_error_log(_("Couldn't login to IMAP server %s."), account->recv_server);
1322                 }
1323
1324                 if (acc_pass != NULL) {
1325                         g_free(acc_pass);
1326                         memset(acc_pass, 0, strlen(acc_pass));
1327                 }
1328
1329                 return ok;
1330         }
1331
1332         if (acc_pass) {
1333                 memset(acc_pass, 0, strlen(acc_pass));
1334                 g_free(acc_pass);
1335         }
1336         statuswindow_pop_all();
1337         session->authenticated = TRUE;
1338         return MAILIMAP_NO_ERROR;
1339 }
1340
1341 static void imap_session_destroy(Session *session)
1342 {
1343         if (session->state != SESSION_DISCONNECTED)
1344                 imap_threaded_disconnect(IMAP_SESSION(session)->folder);
1345
1346         imap_free_capabilities(IMAP_SESSION(session));
1347         g_free(IMAP_SESSION(session)->mbox);
1348 }
1349
1350 static gchar *imap_fetch_msg(Folder *folder, FolderItem *item, gint uid)
1351 {
1352         return imap_fetch_msg_full(folder, item, uid, TRUE, TRUE);
1353 }
1354
1355 static guint get_file_size_with_crs(const gchar *filename)
1356 {
1357         FILE *fp = NULL;
1358         guint cnt = 0;
1359         gchar buf[4096];
1360
1361         if (filename == NULL)
1362                 return -1;
1363
1364         fp = g_fopen(filename, "rb");
1365         if (!fp)
1366                 return -1;
1367
1368         while (fgets(buf, sizeof (buf), fp) != NULL) {
1369                 cnt += strlen(buf);
1370                 if (!strstr(buf, "\r\n") && strstr(buf, "\n"))
1371                         cnt++;
1372         }
1373
1374         fclose(fp);
1375         return cnt;
1376 }
1377
1378 static gchar *imap_get_cached_filename(FolderItem *item, guint msgnum)
1379 {
1380         gchar *path, *filename;
1381
1382         cm_return_val_if_fail(item != NULL, NULL);
1383
1384         path = folder_item_get_path(item);
1385
1386         if (!is_dir_exist(path)) {
1387                 g_free(path);
1388                 return NULL;
1389         }
1390
1391         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(msgnum), NULL);
1392
1393         if (is_dir_exist(filename)) {
1394                 g_free(filename);
1395                 filename = g_strconcat(path, G_DIR_SEPARATOR_S, ".", itos(msgnum), NULL);
1396         }
1397         g_free(path);
1398
1399         return filename;
1400 }
1401
1402 static void imap_remove_cached_msg(Folder *folder, FolderItem *item, MsgInfo *msginfo)
1403 {
1404         gchar *filename;
1405
1406         filename = imap_get_cached_filename(item, msginfo->msgnum);
1407
1408         cm_return_if_fail(filename != NULL);
1409
1410         if (is_file_exist(filename)) {
1411                 claws_unlink(filename);
1412         }
1413         g_free(filename);
1414 }
1415
1416 typedef struct _TagsData {
1417         gchar *str;
1418         GSList *msglist;
1419         IMAPFolderItem *item;
1420 } TagsData;
1421
1422 static void imap_commit_tags(FolderItem *item, MsgInfo *msginfo, GSList *tags_set, GSList *tags_unset)
1423 {
1424         IMAPSession *session;
1425         gint ok, can_create_tags;
1426         Folder *folder = NULL;
1427         TagsData *ht_data = NULL;
1428         GSList *cur;
1429
1430         g_return_if_fail(item != NULL);
1431         g_return_if_fail(msginfo != NULL);
1432
1433         folder = item->folder;
1434         debug_print("getting session...\n");
1435         session = imap_session_get(folder);
1436
1437         if (!session) {
1438                 debug_print("can't get session\n");
1439                 return;
1440         }
1441
1442         ok = imap_select(session, IMAP_FOLDER(folder), item,
1443                          NULL, NULL, NULL, NULL, &can_create_tags, FALSE);
1444
1445         if (ok != MAILIMAP_NO_ERROR) {
1446                 return;
1447         }
1448
1449
1450         if (IMAP_FOLDER_ITEM(item)->can_create_flags != ITEM_CAN_CREATE_FLAGS)
1451                 return;
1452
1453         if (IMAP_FOLDER_ITEM(item)->batching) {
1454                 /* instead of performing an UID STORE command for each message change,
1455                  * as a lot of them can change "together", we just fill in hashtables
1456                  * and defer the treatment so that we're able to send only one
1457                  * command.
1458                  */
1459                 debug_print("IMAP batch mode on, deferring tags change\n");
1460                 for (cur = tags_set; cur; cur = cur->next) {
1461                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1462                         if (cur_tag) {
1463                                 ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->tags_set_table,
1464                                         GINT_TO_POINTER(cur_tag));
1465                                 if (ht_data == NULL) {
1466                                         ht_data = g_new0(TagsData, 1);
1467                                         ht_data->str = g_strdup(tags_get_tag(cur_tag));
1468                                         ht_data->item = IMAP_FOLDER_ITEM(item);
1469                                         g_hash_table_insert(IMAP_FOLDER_ITEM(item)->tags_set_table,
1470                                                 GINT_TO_POINTER(cur_tag), ht_data);
1471                                 }
1472                                 ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
1473                         }
1474                 }
1475                 for (cur = tags_unset; cur; cur = cur->next) {
1476                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1477                         if (cur_tag) {
1478                                 ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->tags_unset_table,
1479                                         GINT_TO_POINTER(cur_tag));
1480                                 if (ht_data == NULL) {
1481                                         ht_data = g_new0(TagsData, 1);
1482                                         ht_data->str = g_strdup(tags_get_tag(cur_tag));
1483                                         ht_data->item = IMAP_FOLDER_ITEM(item);
1484                                         g_hash_table_insert(IMAP_FOLDER_ITEM(item)->tags_unset_table,
1485                                                 GINT_TO_POINTER(cur_tag), ht_data);
1486                                 }
1487                                 ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
1488                         }
1489                 }
1490         } else {
1491                 GSList *list_set = NULL;
1492                 GSList *list_unset = NULL;
1493                 GSList numlist;
1494
1495                 numlist.data = GINT_TO_POINTER(msginfo->msgnum);
1496                 numlist.next = NULL;
1497
1498                 debug_print("IMAP changing tags NOW\n");
1499                 for (cur = tags_set; cur; cur = cur->next) {
1500                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1501                         const gchar *str = tags_get_tag(cur_tag);
1502                         if (IS_NOT_RESERVED_TAG(str))
1503                                 list_set = g_slist_prepend(list_set, g_strdup(str));
1504                 }
1505                 if (list_set) {
1506                         ok = imap_set_message_flags(session,
1507                                 IMAP_FOLDER_ITEM(item), &numlist, 0, list_set, TRUE);
1508                         slist_free_strings_full(list_set);
1509                         if (ok != MAILIMAP_NO_ERROR) {
1510                                 return;
1511                         }
1512                 }
1513
1514                 for (cur = tags_unset; cur; cur = cur->next) {
1515                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1516                         const gchar *str = tags_get_tag(cur_tag);
1517                         if (IS_NOT_RESERVED_TAG(str))
1518                                 list_unset = g_slist_prepend(list_unset, g_strdup(str));
1519                 }
1520                 if (list_unset) {
1521                         ok = imap_set_message_flags(session,
1522                                 IMAP_FOLDER_ITEM(item), &numlist, 0, list_unset, FALSE);
1523                         slist_free_strings_full(list_unset);
1524                         if (ok != MAILIMAP_NO_ERROR) {
1525                                 return;
1526                         }
1527                 }
1528         }
1529 }
1530
1531 static gchar *imap_fetch_msg_full(Folder *folder, FolderItem *item, gint uid,
1532                                   gboolean headers, gboolean body)
1533 {
1534         gchar *path, *filename;
1535         IMAPSession *session;
1536         gint ok;
1537
1538         g_return_val_if_fail(folder != NULL, NULL);
1539         g_return_val_if_fail(item != NULL, NULL);
1540
1541         if (uid == 0)
1542                 return NULL;
1543
1544         path = folder_item_get_path(item);
1545         if (!is_dir_exist(path)) {
1546                 if(is_file_exist(path))
1547                         claws_unlink(path);
1548                 make_dir_hier(path);
1549         }
1550         g_free(path);
1551
1552         filename = imap_get_cached_filename(item, uid);
1553         debug_print("trying to fetch cached %s\n", filename);
1554
1555         if (is_file_exist(filename)) {
1556                 /* see whether the local file represents the whole message
1557                  * or not. As the IMAP server reports size with \r chars,
1558                  * we have to update the local file (UNIX \n only) size */
1559                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1560                 guint have_size = -1;
1561
1562                 if (cached)
1563                         debug_print("message %d has been already %scached.\n", uid,
1564                                 MSG_IS_FULLY_CACHED(cached->flags) ? "fully ":"");
1565
1566                 if (!cached || !MSG_IS_FULLY_CACHED(cached->flags)) {
1567                         have_size = get_file_size_with_crs(filename);
1568                         if (cached && (cached->size <= have_size || !body)) {
1569                                 ok = file_strip_crs(filename);
1570                                 if (ok == 0 && cached && cached->size <= have_size) {
1571                                         /* we have it all and stripped */
1572                                         debug_print("...fully cached in fact (%u/%zd); setting flag.\n",
1573                                                         have_size, cached->size);
1574                                         procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1575                                 }
1576                                 procmsg_msginfo_free(&cached);
1577                                 return filename;
1578                         } else if (!cached && time(NULL) - get_file_mtime(filename) < 60) {
1579                                 debug_print("message not cached and file recent, considering file complete\n");
1580                                 ok = file_strip_crs(filename);
1581                                 if (ok == 0)
1582                                         return filename;
1583                         } else {
1584                                 procmsg_msginfo_free(&cached);
1585                         }
1586                 }
1587                 if (cached && MSG_IS_FULLY_CACHED(cached->flags)) {
1588                         procmsg_msginfo_free(&cached);
1589                         return filename;
1590                 }
1591         } else {
1592                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1593                 if (cached) {
1594                         procmsg_msginfo_unset_flags(cached, MSG_FULLY_CACHED, 0);
1595                         procmsg_msginfo_free(&cached);
1596                 }
1597         }
1598
1599         debug_print("getting session...\n");
1600         session = imap_session_get(folder);
1601
1602         if (!session) {
1603                 g_free(filename);
1604                 return NULL;
1605         }
1606         session_set_access_time(SESSION(session));
1607         lock_session(session); /* unlocked later in the function */
1608
1609         debug_print("IMAP fetching messages\n");
1610         ok = imap_select(session, IMAP_FOLDER(folder), item,
1611                          NULL, NULL, NULL, NULL, NULL, FALSE);
1612         if (ok != MAILIMAP_NO_ERROR) {
1613                 g_warning("can't select mailbox %s", item->path);
1614                 g_free(filename);
1615                 return NULL;
1616         }
1617
1618         session_set_access_time(SESSION(session));
1619
1620         debug_print("getting message %d...\n", uid);
1621         ok = imap_cmd_fetch(session, (guint32)uid, filename, headers, body);
1622
1623         if (ok != MAILIMAP_NO_ERROR) {
1624                 g_warning("can't fetch message %d", uid);
1625                 g_free(filename);
1626                 return NULL;
1627         }
1628
1629         session_set_access_time(SESSION(session));
1630         unlock_session(session);
1631
1632         ok = file_strip_crs(filename);
1633
1634         if (ok == 0 && headers && body) {
1635                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1636                 if (cached) {
1637                         procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1638                         procmsg_msginfo_free(&cached);
1639                 }
1640         } else if (ok == -1) {
1641                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1642                 if (cached) {
1643                         procmsg_msginfo_unset_flags(cached, MSG_FULLY_CACHED, 0);
1644                         procmsg_msginfo_free(&cached);
1645                 }
1646         }
1647         return filename;
1648 }
1649
1650 static gboolean imap_is_msg_fully_cached(Folder *folder, FolderItem *item, gint uid)
1651 {
1652         gchar *filename;
1653         guint size = 0;
1654         MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1655
1656         if (!cached)
1657                 return FALSE;
1658
1659         if (MSG_IS_FULLY_CACHED(cached->flags)) {
1660                 procmsg_msginfo_free(&cached);
1661                 return TRUE;
1662         }
1663
1664         filename = imap_get_cached_filename(item, uid);
1665
1666         if (is_file_exist(filename)) {
1667                 if (cached && cached->total_size == cached->size) {
1668                         /* fast path */
1669                         g_free(filename);
1670                         procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1671                         return TRUE;
1672                 }
1673                 size = get_file_size_with_crs(filename);
1674         }
1675         g_free(filename);
1676         debug_print("msg %d cached, has size %d, full should be %zd.\n", uid, size, cached->size);
1677         if (cached && size >= cached->size) {
1678                 cached->total_size = cached->size;
1679                 procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1680                 procmsg_msginfo_free(&cached);
1681                 return TRUE;
1682         }
1683         if (cached)
1684                 procmsg_msginfo_free(&cached);
1685         return FALSE;
1686 }
1687
1688 void imap_cache_msg(FolderItem *item, gint msgnum)
1689 {
1690         Folder *folder = NULL;
1691
1692         if (!item)
1693                 return;
1694         folder = item->folder;
1695
1696         if (!imap_is_msg_fully_cached(folder, item, msgnum)) {
1697                 gchar *tmp = imap_fetch_msg_full(folder, item, msgnum, TRUE, TRUE);
1698                 debug_print("fetched %s\n", tmp);
1699                 g_free(tmp);
1700         }
1701 }
1702
1703 static gint imap_add_msg(Folder *folder, FolderItem *dest,
1704                          const gchar *file, MsgFlags *flags)
1705 {
1706         gint ret;
1707         GSList file_list;
1708         MsgFileInfo fileinfo;
1709
1710         g_return_val_if_fail(file != NULL, -1);
1711
1712         fileinfo.msginfo = NULL;
1713         fileinfo.file = (gchar *)file;
1714         fileinfo.flags = flags;
1715         file_list.data = &fileinfo;
1716         file_list.next = NULL;
1717
1718         ret = imap_add_msgs(folder, dest, &file_list, NULL);
1719         return ret;
1720 }
1721
1722 static gint imap_add_msgs(Folder *folder, FolderItem *dest, GSList *file_list,
1723                    GHashTable *relation)
1724 {
1725         gchar *destdir;
1726         IMAPSession *session;
1727         guint32 last_uid = 0;
1728         GSList *cur;
1729         MsgFileInfo *fileinfo;
1730         gint ok = MAILIMAP_NO_ERROR;
1731         gint curnum = 0, total = 0;
1732         gboolean missing_uids = FALSE;
1733
1734         g_return_val_if_fail(folder != NULL, -1);
1735         g_return_val_if_fail(dest != NULL, -1);
1736         g_return_val_if_fail(file_list != NULL, -1);
1737
1738         debug_print("getting session...\n");
1739         session = imap_session_get(folder);
1740         if (!session) {
1741                 return -1;
1742         }
1743         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
1744         if (is_fatal(ok)) {
1745                 g_free(destdir);
1746                 return -1;
1747         }
1748         statusbar_print_all(_("Adding messages..."));
1749         total = g_slist_length(file_list);
1750         for (cur = file_list; cur != NULL; cur = cur->next) {
1751                 IMAPFlags iflags = 0;
1752                 guint32 new_uid = 0;
1753                 gchar *real_file = NULL;
1754                 fileinfo = (MsgFileInfo *)cur->data;
1755
1756                 statusbar_progress_all(curnum, total, total < 10 ? 1:10);
1757                 curnum++;
1758
1759                 if (fileinfo->flags) {
1760                         if (MSG_IS_MARKED(*fileinfo->flags))
1761                                 iflags |= IMAP_FLAG_FLAGGED;
1762                         if (MSG_IS_REPLIED(*fileinfo->flags))
1763                                 iflags |= IMAP_FLAG_ANSWERED;
1764                         if (MSG_IS_FORWARDED(*fileinfo->flags))
1765                                 iflags |= IMAP_FLAG_FORWARDED;
1766                         if (MSG_IS_SPAM(*fileinfo->flags))
1767                                 iflags |= IMAP_FLAG_SPAM;
1768                         else
1769                                 iflags |= IMAP_FLAG_HAM;
1770                         if (!MSG_IS_UNREAD(*fileinfo->flags))
1771                                 iflags |= IMAP_FLAG_SEEN;
1772
1773                 }
1774
1775                 if (real_file == NULL)
1776                         real_file = g_strdup(fileinfo->file);
1777
1778                 if (folder_has_parent_of_type(dest, F_QUEUE) ||
1779                     folder_has_parent_of_type(dest, F_OUTBOX) ||
1780                     folder_has_parent_of_type(dest, F_DRAFT) ||
1781                     folder_has_parent_of_type(dest, F_TRASH))
1782                         iflags |= IMAP_FLAG_SEEN;
1783
1784                 ok = imap_cmd_append(session, IMAP_FOLDER_ITEM(dest), destdir, real_file, iflags,
1785                                      &new_uid);
1786
1787                 if (ok != MAILIMAP_NO_ERROR) {
1788                         g_warning("can't append message %s", real_file);
1789                         g_free(real_file);
1790                         g_free(destdir);
1791                         statusbar_progress_all(0,0,0);
1792                         statusbar_pop_all();
1793                         return -1;
1794                 } else {
1795                         debug_print("appended new message as %d\n", new_uid);
1796                         /* put the local file in the imapcache, so that we don't
1797                          * have to fetch it back later. */
1798
1799                         if (new_uid == 0) {
1800                                 missing_uids = TRUE;
1801                                 debug_print("Missing UID (0)\n");
1802                         }
1803                         if (new_uid > 0) {
1804                                 gchar *cache_path = folder_item_get_path(dest);
1805                                 if (!is_dir_exist(cache_path))
1806                                         make_dir_hier(cache_path);
1807                                 if (is_dir_exist(cache_path)) {
1808                                         gchar *cache_file = g_strconcat(
1809                                                 cache_path, G_DIR_SEPARATOR_S,
1810                                                 itos(new_uid), NULL);
1811                                         copy_file(real_file, cache_file, TRUE);
1812                                         debug_print("got UID %d, copied to cache: %s\n", new_uid, cache_file);
1813                                         g_free(cache_file);
1814                                 }
1815                                 g_free(cache_path);
1816                         }
1817                 }
1818
1819                 if (relation != NULL)
1820                         g_hash_table_insert(relation, fileinfo->msginfo != NULL ?
1821                                           (gpointer) fileinfo->msginfo : (gpointer) fileinfo,
1822                                           GINT_TO_POINTER(new_uid));
1823                 if (last_uid < new_uid) {
1824                         last_uid = new_uid;
1825                 }
1826
1827                 g_free(real_file);
1828         }
1829
1830         statusbar_progress_all(0,0,0);
1831         statusbar_pop_all();
1832
1833
1834         g_free(destdir);
1835
1836         imap_scan_required(folder, dest);
1837
1838         session = imap_session_get(folder);
1839         if (!session) {
1840                 return -1;
1841         }
1842         if (missing_uids) {
1843                 gint a;
1844                 ok = imap_select(session, IMAP_FOLDER(folder), dest,
1845                          &a, NULL, NULL, NULL, NULL, FALSE);
1846         }
1847         return last_uid;
1848 }
1849
1850 static GSList *flatten_mailimap_set(struct mailimap_set * set)
1851 {
1852         GSList *result = NULL;
1853         clistiter *list;
1854         guint32 start, end, t;
1855         GSList *cur;
1856
1857         if (!set || !set->set_list)
1858                 return NULL;
1859
1860         for (list = clist_begin(set->set_list); list; list = clist_next(list)) {
1861                 struct mailimap_set_item *item = (struct mailimap_set_item *)clist_content(list);
1862                 start = item->set_first;
1863                 end = item->set_last;
1864                 if (start <= end) {
1865                         for (t = start; t <= end; t++) {
1866                                 result = g_slist_prepend(result, GINT_TO_POINTER(t));
1867                         }
1868                 }
1869         }
1870         result = g_slist_reverse(result);
1871         if (debug_get_mode()) {
1872                 debug_print("flat imap set: ");
1873                 for (cur = result; cur; cur = cur->next) {
1874                         debug_print("%d ", GPOINTER_TO_INT(cur->data));
1875                 }
1876                 debug_print("\n");
1877         }
1878
1879         return result;
1880 }
1881 static gint imap_do_copy_msgs(Folder *folder, FolderItem *dest,
1882                               MsgInfoList *msglist, GHashTable *relation,
1883                               gboolean same_dest_ok)
1884 {
1885         FolderItem *src;
1886         gchar *destdir;
1887         GSList *seq_list, *cur;
1888         MsgInfo *msginfo;
1889         IMAPSession *session;
1890         gint ok = MAILIMAP_NO_ERROR;
1891         GHashTable *uid_hash;
1892         gint last_num = 0;
1893
1894         g_return_val_if_fail(folder != NULL, -1);
1895         g_return_val_if_fail(dest != NULL, -1);
1896         g_return_val_if_fail(msglist != NULL, -1);
1897
1898         debug_print("getting session...\n");
1899         session = imap_session_get(folder);
1900
1901         if (!session) {
1902                 return -1;
1903         }
1904
1905         msginfo = (MsgInfo *)msglist->data;
1906         src = msginfo->folder;
1907         if (!same_dest_ok && src == dest) {
1908                 g_warning("the src folder is identical to the dest.");
1909                 return -1;
1910         }
1911
1912         if (src->folder != dest->folder) {
1913                 GSList *infolist = NULL, *cur;
1914                 int res = -1;
1915                 for (cur = msglist; cur; cur = cur->next) {
1916                         msginfo = (MsgInfo *)cur->data;
1917                         MsgFileInfo *fileinfo = g_new0(MsgFileInfo, 1);
1918                         fileinfo->file = procmsg_get_message_file(msginfo);
1919                         fileinfo->flags = &(msginfo->flags);
1920                         infolist = g_slist_prepend(infolist, fileinfo);
1921                 }
1922                 infolist = g_slist_reverse(infolist);
1923                 res = folder_item_add_msgs(dest, infolist, FALSE);
1924                 for (cur = infolist; cur; cur = cur->next) {
1925                         MsgFileInfo *info = (MsgFileInfo *)cur->data;
1926                         g_free(info->file);
1927                         g_free(info);
1928                 }
1929                 g_slist_free(infolist);
1930                 return res;
1931         }
1932
1933         lock_session(session); /* unlocked later in the function */
1934
1935         ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
1936                          NULL, NULL, NULL, NULL, NULL, FALSE);
1937         if (ok != MAILIMAP_NO_ERROR) {
1938                 return ok;
1939         }
1940
1941         unlock_session(session);
1942
1943         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
1944
1945         if (is_fatal(ok)) {
1946                 g_free(destdir);
1947                 return ok;
1948         }
1949
1950         seq_list = imap_get_lep_set_from_msglist(IMAP_FOLDER(folder), msglist);
1951         uid_hash = g_hash_table_new(g_direct_hash, g_direct_equal);
1952
1953         statusbar_print_all(_("Copying messages..."));
1954         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
1955                 struct mailimap_set * seq_set;
1956                 struct mailimap_set * source = NULL;
1957                 struct mailimap_set * dest = NULL;
1958                 seq_set = cur->data;
1959
1960                 debug_print("Copying messages from %s to %s ...\n",
1961                             src->path, destdir);
1962
1963                 lock_session(session); /* unlocked later in the function */
1964                 ok = imap_cmd_copy(session, seq_set, destdir,
1965                         &source, &dest);
1966
1967                 if (is_fatal(ok)) {
1968                         session = NULL;
1969                 }
1970
1971                 if (ok == MAILIMAP_NO_ERROR) {
1972                         unlock_session(session);
1973                         if (relation && source && dest) {
1974                                 GSList *s_list = flatten_mailimap_set(source);
1975                                 GSList *d_list = flatten_mailimap_set(dest);
1976                                 GSList *s_cur, *d_cur;
1977                                 if (g_slist_length(s_list) == g_slist_length(d_list)) {
1978
1979                                         for (s_cur = s_list, d_cur = d_list;
1980                                              s_cur && d_cur;
1981                                              s_cur = s_cur->next, d_cur = d_cur->next) {
1982                                                 g_hash_table_insert(uid_hash, s_cur->data, d_cur->data);
1983                                         }
1984
1985                                 } else {
1986                                         debug_print("hhhmm, source list length != dest list length.\n");
1987                                 }
1988                                 g_slist_free(s_list);
1989                                 g_slist_free(d_list);
1990                         }
1991                 }
1992
1993
1994                 if (source)
1995                         mailimap_set_free(source);
1996                 if (dest)
1997                         mailimap_set_free(dest);
1998
1999                 if (ok != MAILIMAP_NO_ERROR) {
2000                         g_hash_table_destroy(uid_hash);
2001                         imap_lep_set_free(seq_list);
2002                         statusbar_pop_all();
2003                         return -1;
2004                 }
2005         }
2006
2007         for (cur = msglist; cur != NULL; cur = g_slist_next(cur)) {
2008                 MsgInfo *msginfo = (MsgInfo *)cur->data;
2009                 gpointer hashval;
2010
2011                 hashval = g_hash_table_lookup(uid_hash, GINT_TO_POINTER(msginfo->msgnum));
2012
2013                 if (hashval != NULL) {
2014                         gint num = GPOINTER_TO_INT(hashval);
2015                         g_hash_table_insert(relation, msginfo,
2016                                           GINT_TO_POINTER(num));
2017                         if (num > last_num)
2018                                 last_num = num;
2019                         debug_print("copied message %d as %d\n", msginfo->msgnum, num);
2020                         /* put the local file in the imapcache, so that we don't
2021                          * have to fetch it back later. */
2022                         if (num > 0) {
2023                                 gchar *cache_path = folder_item_get_path(msginfo->folder);
2024                                 gchar *real_file = g_strconcat(
2025                                         cache_path, G_DIR_SEPARATOR_S,
2026                                         itos(msginfo->msgnum), NULL);
2027                                 gchar *cache_file = NULL;
2028                                 g_free(cache_path);
2029                                 cache_path = folder_item_get_path(dest);
2030                                 cache_file = g_strconcat(
2031                                         cache_path, G_DIR_SEPARATOR_S,
2032                                         itos(num), NULL);
2033                                 if (!is_dir_exist(cache_path))
2034                                         make_dir_hier(cache_path);
2035                                 if (is_file_exist(real_file) && is_dir_exist(cache_path)) {
2036                                         if (copy_file(real_file, cache_file, TRUE) < 0)
2037                                                 debug_print("couldn't cache to %s: %s\n", cache_file,
2038                                                             strerror(errno));
2039                                         else
2040                                                 debug_print("copied to cache: %s\n", cache_file);
2041                                 }
2042                                 g_free(real_file);
2043                                 g_free(cache_file);
2044                                 g_free(cache_path);
2045                         }
2046                 } else
2047                         g_hash_table_insert(relation, msginfo,
2048                                           GINT_TO_POINTER(0));
2049         }
2050         statusbar_pop_all();
2051
2052         g_hash_table_destroy(uid_hash);
2053         imap_lep_set_free(seq_list);
2054
2055         g_free(destdir);
2056
2057         IMAP_FOLDER_ITEM(dest)->lastuid = 0;
2058         IMAP_FOLDER_ITEM(dest)->uid_next = 0;
2059         g_slist_free(IMAP_FOLDER_ITEM(dest)->uid_list);
2060         IMAP_FOLDER_ITEM(dest)->uid_list = NULL;
2061
2062         imap_scan_required(folder, dest);
2063         if (ok == MAILIMAP_NO_ERROR)
2064                 return last_num;
2065         else
2066                 return -1;
2067 }
2068
2069 static gint imap_copy_msg(Folder *folder, FolderItem *dest, MsgInfo *msginfo)
2070 {
2071         GSList msglist;
2072
2073         g_return_val_if_fail(msginfo != NULL, -1);
2074
2075         msglist.data = msginfo;
2076         msglist.next = NULL;
2077
2078         return imap_copy_msgs(folder, dest, &msglist, NULL);
2079 }
2080
2081 static gint imap_copy_msgs(Folder *folder, FolderItem *dest,
2082                     MsgInfoList *msglist, GHashTable *relation)
2083 {
2084         MsgInfo *msginfo;
2085         gint ret;
2086
2087         g_return_val_if_fail(folder != NULL, -1);
2088         g_return_val_if_fail(dest != NULL, -1);
2089         g_return_val_if_fail(msglist != NULL, -1);
2090
2091         msginfo = (MsgInfo *)msglist->data;
2092         g_return_val_if_fail(msginfo->folder != NULL, -1);
2093
2094         ret = imap_do_copy_msgs(folder, dest, msglist, relation, FALSE);
2095         return ret;
2096 }
2097
2098 static gboolean imap_matcher_type_is_local(gint matchertype)
2099 {
2100         switch (matchertype) {
2101         case MATCHCRITERIA_FROM:
2102         case MATCHCRITERIA_TO:
2103         case MATCHCRITERIA_CC:
2104         case MATCHCRITERIA_TO_OR_CC:
2105         case MATCHCRITERIA_SUBJECT:
2106         case MATCHCRITERIA_REFERENCES:
2107         case MATCHCRITERIA_MESSAGEID:
2108         case MATCHCRITERIA_INREPLYTO:
2109         case MATCHCRITERIA_AGE_GREATER:
2110         case MATCHCRITERIA_AGE_LOWER:
2111         case MATCHCRITERIA_FORWARDED:
2112         case MATCHCRITERIA_SPAM:
2113         case MATCHCRITERIA_UNREAD:
2114         case MATCHCRITERIA_NEW:
2115         case MATCHCRITERIA_MARKED:
2116         case MATCHCRITERIA_REPLIED:
2117         case MATCHCRITERIA_DELETED:
2118         case MATCHCRITERIA_SIZE_GREATER:
2119         case MATCHCRITERIA_SIZE_SMALLER:
2120         case MATCHCRITERIA_SIZE_EQUAL:
2121                 return TRUE;
2122         }
2123         return FALSE;
2124 }
2125
2126 static IMAPSearchKey* search_make_key(MatcherProp* match, gboolean* is_all)
2127 {
2128         if (match->matchtype == MATCHTYPE_MATCHCASE || match->matchtype == MATCHTYPE_MATCH) {
2129                 IMAPSearchKey* result = NULL;
2130                 gboolean invert = FALSE;
2131                 gint matchertype = match->criteria;
2132
2133                 if (is_all) {
2134                         *is_all = FALSE;
2135                 }
2136
2137                 switch (matchertype) {
2138                 case MATCHCRITERIA_NOT_NEW: invert = TRUE; matchertype = MATCHCRITERIA_NEW; break;
2139                 case MATCHCRITERIA_NOT_MARKED: invert = TRUE; matchertype = MATCHCRITERIA_MARKED; break;
2140                 case MATCHCRITERIA_NOT_FORWARDED: invert = TRUE; matchertype = MATCHCRITERIA_FORWARDED; break;
2141                 case MATCHCRITERIA_NOT_SPAM: invert = TRUE; matchertype = MATCHCRITERIA_SPAM; break;
2142                 case MATCHCRITERIA_NOT_SUBJECT: invert = TRUE; matchertype = MATCHCRITERIA_SUBJECT; break;
2143                 case MATCHCRITERIA_NOT_FROM: invert = TRUE; matchertype = MATCHCRITERIA_FROM; break;
2144                 case MATCHCRITERIA_NOT_TO: invert = TRUE; matchertype = MATCHCRITERIA_TO; break;
2145                 case MATCHCRITERIA_NOT_CC: invert = TRUE; matchertype = MATCHCRITERIA_CC; break;
2146                 case MATCHCRITERIA_NOT_REFERENCES: invert = TRUE; matchertype = MATCHCRITERIA_REFERENCES; break;
2147                 case MATCHCRITERIA_NOT_HEADER: invert = TRUE; matchertype = MATCHCRITERIA_HEADER; break;
2148                 case MATCHCRITERIA_NOT_TAG: invert = TRUE; matchertype = MATCHCRITERIA_TAG; break;
2149                 case MATCHCRITERIA_NOT_HEADERS_PART: invert = TRUE; matchertype = MATCHCRITERIA_HEADERS_PART; break;
2150                 case MATCHCRITERIA_NOT_HEADERS_CONT: invert = TRUE; matchertype = MATCHCRITERIA_HEADERS_CONT; break;
2151                 case MATCHCRITERIA_NOT_MESSAGE: invert = TRUE; matchertype = MATCHCRITERIA_MESSAGE; break;
2152                 case MATCHCRITERIA_NOT_BODY_PART: invert = TRUE; matchertype = MATCHCRITERIA_BODY_PART; break;
2153                 case MATCHCRITERIA_NOT_TO_AND_NOT_CC: invert = TRUE; matchertype = MATCHCRITERIA_TO_OR_CC; break;
2154                 case MATCHCRITERIA_NOT_MESSAGEID: invert = TRUE; matchertype = MATCHCRITERIA_MESSAGEID; break;
2155                 case MATCHCRITERIA_NOT_INREPLYTO: invert = TRUE; matchertype = MATCHCRITERIA_INREPLYTO; break;
2156                 }
2157
2158                 /*
2159                  * this aborts conversion even for predicates understood by the following code.
2160                  * while that might seem wasteful, claws local search for information listed below
2161                  * has proven faster than IMAP search plus network roundtrips. once this changes,
2162                  * consider removing these exceptions.
2163                  */
2164                 if (imap_matcher_type_is_local(matchertype))
2165                         return NULL;
2166
2167                 /* the Message-ID header is also cached */
2168                 if (matchertype == MATCHCRITERIA_HEADER && g_strcmp0("Message-ID", match->header) == 0) {
2169                         return NULL;
2170                 }
2171
2172                 switch (matchertype) {
2173                 case MATCHCRITERIA_FORWARDED:
2174                         result = imap_search_new(IMAP_SEARCH_CRITERIA_TAG, NULL, RTAG_FORWARDED, 0);
2175                         break;
2176
2177                 case MATCHCRITERIA_SPAM:
2178                         result = imap_search_new(IMAP_SEARCH_CRITERIA_TAG, NULL, RTAG_JUNK, 0);
2179                         break;
2180
2181                 case MATCHCRITERIA_MESSAGEID:
2182                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, "Message-ID", match->expr, 0);
2183                         break;
2184
2185                 case MATCHCRITERIA_INREPLYTO:
2186                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, "In-Reply-To", match->expr, 0);
2187                         break;
2188
2189                 case MATCHCRITERIA_REFERENCES:
2190                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, "References", match->expr, 0);
2191                         break;
2192
2193                 case MATCHCRITERIA_TO_OR_CC:
2194                         result = imap_search_or(
2195                                         imap_search_new(IMAP_SEARCH_CRITERIA_TO, NULL, match->expr, 0),
2196                                         imap_search_new(IMAP_SEARCH_CRITERIA_CC, NULL, match->expr, 0)
2197                                         );
2198                         break;
2199
2200                 case MATCHCRITERIA_HEADERS_PART:
2201                 case MATCHCRITERIA_HEADERS_CONT:
2202                         result = imap_search_and(
2203                                         imap_search_not(imap_search_new(IMAP_SEARCH_CRITERIA_BODY, NULL, match->expr, 0)),
2204                                         imap_search_new(IMAP_SEARCH_CRITERIA_MESSAGE, NULL, match->expr, 0)
2205                                         );
2206                         break;
2207
2208                 case MATCHCRITERIA_SIZE_EQUAL:
2209                         result = imap_search_and(
2210                                         imap_search_not(imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_SMALLER, NULL, NULL, match->value)),
2211                                         imap_search_not(imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_GREATER, NULL, NULL, match->value))
2212                                         );
2213                         break;
2214
2215                 case MATCHCRITERIA_NOT_UNREAD:
2216                         result = imap_search_new(IMAP_SEARCH_CRITERIA_READ, NULL, NULL, 0);
2217                         break;
2218
2219                 case MATCHCRITERIA_UNREAD:
2220                         result = imap_search_new(IMAP_SEARCH_CRITERIA_UNREAD, NULL, NULL, 0);
2221                         break;
2222
2223                 case MATCHCRITERIA_NEW:
2224                         result = imap_search_new(IMAP_SEARCH_CRITERIA_NEW, NULL, NULL, 0);
2225                         break;
2226
2227                 case MATCHCRITERIA_MARKED:
2228                         result = imap_search_new(IMAP_SEARCH_CRITERIA_MARKED, NULL, NULL, 0);
2229                         break;
2230
2231                 case MATCHCRITERIA_DELETED:
2232                         result = imap_search_new(IMAP_SEARCH_CRITERIA_DELETED, NULL, NULL, 0);
2233                         break;
2234
2235                 case MATCHCRITERIA_REPLIED:
2236                         result = imap_search_new(IMAP_SEARCH_CRITERIA_REPLIED, NULL, NULL, 0);
2237                         break;
2238
2239                 case MATCHCRITERIA_TAG:
2240                         {
2241                                 gchar *tmp = imap_utf8_to_modified_utf7(match->expr, TRUE);
2242                                 result = imap_search_new(IMAP_SEARCH_CRITERIA_TAG, NULL, tmp, 0);
2243                                 g_free(tmp);
2244                         }
2245                         break;
2246
2247                 case MATCHCRITERIA_SUBJECT:
2248                         result = imap_search_new(IMAP_SEARCH_CRITERIA_SUBJECT, NULL, match->expr, 0);
2249                         break;
2250
2251                 case MATCHCRITERIA_FROM:
2252                         result = imap_search_new(IMAP_SEARCH_CRITERIA_FROM, NULL, match->expr, 0);
2253                         break;
2254
2255                 case MATCHCRITERIA_TO:
2256                         result = imap_search_new(IMAP_SEARCH_CRITERIA_TO, NULL, match->expr, 0);
2257                         break;
2258
2259                 case MATCHCRITERIA_CC:
2260                         result = imap_search_new(IMAP_SEARCH_CRITERIA_CC, NULL, match->expr, 0);
2261                         break;
2262
2263                 case MATCHCRITERIA_AGE_GREATER:
2264                         result = imap_search_new(IMAP_SEARCH_CRITERIA_AGE_GREATER, NULL, NULL, match->value);
2265                         break;
2266
2267                 case MATCHCRITERIA_AGE_LOWER:
2268                         result = imap_search_new(IMAP_SEARCH_CRITERIA_AGE_LOWER, NULL, NULL, match->value);
2269                         break;
2270
2271                 case MATCHCRITERIA_BODY_PART:
2272                         result = imap_search_new(IMAP_SEARCH_CRITERIA_BODY, NULL, match->expr, 0);
2273                         break;
2274
2275                 case MATCHCRITERIA_MESSAGE:
2276                         result = imap_search_new(IMAP_SEARCH_CRITERIA_MESSAGE, NULL, match->expr, 0);
2277                         break;
2278
2279                 case MATCHCRITERIA_HEADER:
2280                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, match->header, match->expr, 0);
2281                         break;
2282
2283                 case MATCHCRITERIA_SIZE_GREATER:
2284                         result = imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_GREATER, NULL, NULL, match->value);
2285                         break;
2286
2287                 case MATCHCRITERIA_SIZE_SMALLER:
2288                         result = imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_SMALLER, NULL, NULL, match->value);
2289                         break;
2290
2291                 default:
2292                         result = imap_search_new(IMAP_SEARCH_CRITERIA_ALL, NULL, NULL, 0);
2293                         if (is_all) {
2294                                 *is_all = TRUE;
2295                         }
2296                         break;
2297                 }
2298
2299                 if (invert) {
2300                         result = imap_search_not(result);
2301                         if (is_all && *is_all) {
2302                                 *is_all = FALSE;
2303                         }
2304                 }
2305
2306                 return result;
2307         }
2308
2309         return NULL;
2310 }
2311
2312 static void imap_change_search_charset(IMAPFolder *folder)
2313 {
2314         /* If server supports charset in searches, but the last used one failed,
2315          * changed to the next preferred charset. If none are still available,
2316          * disable charset searches.
2317          * Charsets are tried in the following order:
2318          * UTF-8, locale's charset, UTF-7.
2319          */
2320
2321         if (folder->search_charset_supported) {
2322                 if (folder->search_charset && !strcmp(folder->search_charset, conv_get_locale_charset_str_no_utf8()))
2323                         folder->search_charset = "UTF-8";
2324                 else if (folder->search_charset && !strcmp(folder->search_charset, "UTF-8"))
2325                         folder->search_charset = "UTF-7";
2326                 else {
2327                         folder->search_charset = NULL;
2328                         folder->search_charset_supported = FALSE;
2329                 }
2330         }
2331 }
2332
2333 static MatcherProp *imap_matcher_prop_set_charset(IMAPFolder *folder,
2334                                                   MatcherProp *utf8_prop,
2335                                                   gchar **charset)
2336 {
2337         /* If the match is going to be done locally, or the criteria is on
2338          * tag (special-cased to modified-UTF-7), or the expression searched
2339          * is ASCII, don't bother converting.
2340          */
2341         if (imap_matcher_type_is_local(utf8_prop->criteria)
2342          || utf8_prop->criteria == MATCHCRITERIA_TAG
2343          || utf8_prop->criteria == MATCHCRITERIA_NOT_TAG
2344          || utf8_prop->expr == NULL
2345          || is_ascii_str(utf8_prop->expr))
2346                 return matcherprop_new(utf8_prop->criteria,
2347                                utf8_prop->header,
2348                                utf8_prop->matchtype,
2349                                utf8_prop->expr,
2350                                utf8_prop->value);
2351         else {
2352                 gchar *conv_expr = NULL;
2353
2354                 /* If the search is server-side and the server doesn't support
2355                  * searching with the charsets we handle, bail out.
2356                  */
2357                 if (folder->search_charset_supported == FALSE)
2358                         return NULL;
2359
2360                 /* Else, convert. */
2361                 if (*charset == NULL)
2362                         *charset = g_strdup(folder->search_charset);
2363
2364                 conv_expr = conv_codeset_strdup(utf8_prop->expr, CS_UTF_8, *charset);
2365
2366                 if (conv_expr == NULL)
2367                         conv_expr = g_strdup(utf8_prop->expr);
2368
2369                 return matcherprop_new(utf8_prop->criteria,
2370                                utf8_prop->header,
2371                                utf8_prop->matchtype,
2372                                conv_expr,
2373                                utf8_prop->value);
2374         }
2375 }
2376
2377 static gint     search_msgs             (Folder                 *folder,
2378                                          FolderItem             *container,
2379                                          MsgNumberList          **msgs,
2380                                          gboolean               *on_server,
2381                                          MatcherList            *predicate,
2382                                          SearchProgressNotify   progress_cb,
2383                                          gpointer               progress_data)
2384 {
2385         IMAPSearchKey* key = NULL;
2386         GSList* cur;
2387         int result = -1;
2388         clist* uidlist = NULL;
2389         gboolean server_filtering_useless = FALSE;
2390         IMAPSession *session;
2391         gchar *charset_to_use = NULL;
2392
2393         if (on_server == NULL || !*on_server) {
2394                 return folder_item_search_msgs_local(folder, container, msgs, on_server,
2395                                 predicate, progress_cb, progress_data);
2396         }
2397
2398         for (cur = predicate->matchers; cur != NULL; cur = cur->next) {
2399                 IMAPSearchKey* matcherPart = NULL;
2400                 MatcherProp* prop = (MatcherProp*) cur->data;
2401                 gboolean is_all;
2402                 MatcherProp *imap_prop = imap_matcher_prop_set_charset(IMAP_FOLDER(folder), prop, &charset_to_use);
2403
2404                 if (imap_prop == NULL) {
2405                         /* Couldn't convert matcherprop to IMAP - probably not ascii
2406                          * and server doesn't support the charsets we do. */
2407                          return -1;
2408                 }
2409
2410                 matcherPart = search_make_key(imap_prop, &is_all);
2411
2412                 matcherprop_free(imap_prop);
2413
2414                 if (on_server) {
2415                         *on_server &= matcherPart != NULL && prop->matchtype == MATCHTYPE_MATCHCASE;
2416                 }
2417
2418                 if (matcherPart) {
2419                         if (key == NULL) {
2420                                 key = matcherPart;
2421                                 server_filtering_useless = is_all;
2422                         } else if (predicate->bool_and) {
2423                                 key = imap_search_and(key, matcherPart);
2424                                 server_filtering_useless &= is_all;
2425                         } else {
2426                                 key = imap_search_or(key, matcherPart);
2427                                 server_filtering_useless |= is_all;
2428                         }
2429                 }
2430         }
2431
2432         if (server_filtering_useless) {
2433                 imap_search_free(key);
2434                 key = NULL;
2435         }
2436
2437         if (key == NULL && progress_cb != NULL) {
2438                 GSList* cur;
2439                 GSList* list;
2440                 int count = 0;
2441
2442                 progress_cb(progress_data, TRUE, 0, 0, container->total_msgs);
2443                 progress_cb(progress_data, TRUE, container->total_msgs, 0, container->total_msgs);
2444
2445                 list = folder_item_get_msg_list(container);
2446                 for (cur = list; cur != NULL; cur = cur->next) {
2447                         *msgs = g_slist_prepend(*msgs, GUINT_TO_POINTER(((MsgInfo*) cur->data)->msgnum));
2448                         count++;
2449                 }
2450                 procmsg_msg_list_free(list);
2451
2452                 *msgs = g_slist_reverse(*msgs);
2453
2454                 return count;
2455         }
2456
2457         session = imap_session_get(folder);
2458         if (!session) {
2459                 return -1;
2460         }
2461         result = imap_select(session, IMAP_FOLDER(folder), FOLDER_ITEM(container),
2462                          NULL, NULL, NULL, NULL, NULL, TRUE);
2463         if (result != MAILIMAP_NO_ERROR)
2464                 return -1;
2465
2466         if (progress_cb)
2467                 progress_cb(progress_data, TRUE, 0, 0, container->total_msgs);
2468         result = imap_threaded_search(folder, IMAP_SEARCH_TYPE_KEYED, key, charset_to_use, NULL, &uidlist);
2469         if (progress_cb)
2470                 progress_cb(progress_data, TRUE, container->total_msgs, 0, container->total_msgs);
2471
2472         if (result == MAILIMAP_NO_ERROR) {
2473                 gint result = 0;
2474
2475                 *msgs = imap_uid_list_from_lep(uidlist, &result);
2476
2477                 mailimap_search_result_free(uidlist);
2478
2479                 if (charset_to_use != NULL)
2480                         g_free(charset_to_use);
2481
2482                 return result;
2483         } else if (charset_to_use != NULL) {
2484                 /* If search failed and was on an 8-bit string, try the next
2485                  * available charset to search if there still are some.
2486                  */
2487                 g_free(charset_to_use);
2488
2489                 imap_change_search_charset(IMAP_FOLDER(folder));
2490                 if (IMAP_FOLDER(folder)->search_charset_supported)
2491                         return search_msgs(folder, container, msgs, on_server, predicate,
2492                                    progress_cb, progress_data);
2493                 else
2494                         return -1;
2495         } else {
2496                 return -1;
2497         }
2498 }
2499
2500
2501 static gint imap_do_remove_msgs(Folder *folder, FolderItem *dest,
2502                                 MsgInfoList *msglist, GHashTable *relation)
2503 {
2504         gchar *destdir, *dir;
2505         GSList *numlist = NULL, *cur;
2506         MsgInfo *msginfo;
2507         IMAPSession *session;
2508         gint ok = MAILIMAP_NO_ERROR;
2509
2510         g_return_val_if_fail(folder != NULL, -1);
2511         g_return_val_if_fail(dest != NULL, -1);
2512         g_return_val_if_fail(msglist != NULL, -1);
2513
2514         debug_print("getting session...\n");
2515         session = imap_session_get(folder);
2516         if (!session) {
2517                 return -1;
2518         }
2519
2520         lock_session(session); /* unlocked later in the function */
2521
2522         msginfo = (MsgInfo *)msglist->data;
2523
2524         ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
2525                          NULL, NULL, NULL, NULL, NULL, FALSE);
2526         if (ok != MAILIMAP_NO_ERROR) {
2527                 return ok;
2528         }
2529
2530         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
2531         if (is_fatal(ok)) {
2532                 g_free(destdir);
2533                 return ok;
2534         }
2535         for (cur = msglist; cur; cur = cur->next) {
2536                 msginfo = (MsgInfo *)cur->data;
2537                 if (!MSG_IS_DELETED(msginfo->flags))
2538                         numlist = g_slist_prepend(numlist, GINT_TO_POINTER(msginfo->msgnum));
2539         }
2540         numlist = g_slist_reverse(numlist);
2541
2542         if (numlist != NULL) {
2543                 ok = imap_set_message_flags
2544                         (session, IMAP_FOLDER_ITEM(msginfo->folder), numlist, IMAP_FLAG_DELETED, NULL, TRUE);
2545                 if (ok != MAILIMAP_NO_ERROR) {
2546                         log_warning(LOG_PROTOCOL, _("can't set deleted flags\n"));
2547                         g_free(destdir);
2548                         return ok;
2549                 }
2550         } /* else we just need to expunge */
2551         ok = imap_cmd_expunge(session, folder->account->imap_use_trash);
2552         if (ok != MAILIMAP_NO_ERROR) {
2553                 log_warning(LOG_PROTOCOL, _("can't expunge\n"));
2554                 g_free(destdir);
2555                 return ok;
2556         }
2557
2558         session->folder_content_changed = TRUE;
2559         unlock_session(session);
2560
2561         dir = folder_item_get_path(msginfo->folder);
2562         if (is_dir_exist(dir)) {
2563                 for (cur = msglist; cur; cur = cur->next) {
2564                         msginfo = (MsgInfo *)cur->data;
2565                         remove_numbered_files(dir, msginfo->msgnum, msginfo->msgnum);
2566                 }
2567         }
2568         g_free(dir);
2569
2570         g_slist_free(numlist);
2571
2572         imap_scan_required(folder, dest);
2573
2574         g_free(destdir);
2575
2576         return 0;
2577 }
2578
2579 static gint imap_remove_msgs(Folder *folder, FolderItem *dest,
2580                     MsgInfoList *msglist, GHashTable *relation)
2581 {
2582         MsgInfo *msginfo;
2583
2584         g_return_val_if_fail(folder != NULL, -1);
2585         g_return_val_if_fail(dest != NULL, -1);
2586         if (msglist == NULL)
2587                 return 0;
2588
2589         msginfo = (MsgInfo *)msglist->data;
2590         g_return_val_if_fail(msginfo->folder != NULL, -1);
2591
2592         return imap_do_remove_msgs(folder, dest, msglist, relation);
2593 }
2594
2595 static gint imap_remove_all_msg(Folder *folder, FolderItem *item)
2596 {
2597         GSList *list = folder_item_get_msg_list(item);
2598         gint res = imap_remove_msgs(folder, item, list, NULL);
2599         procmsg_msg_list_free(list);
2600         return res;
2601 }
2602
2603 static gboolean imap_is_msg_changed(Folder *folder, FolderItem *item,
2604                                     MsgInfo *msginfo)
2605 {
2606         /* TODO: properly implement this method */
2607         return FALSE;
2608 }
2609
2610 static gint imap_close(Folder *folder, FolderItem *item)
2611 {
2612         return 0;
2613 }
2614
2615 static gint imap_scan_tree_real(Folder *folder, gboolean subs_only)
2616 {
2617         FolderItem *item = NULL;
2618         IMAPSession *session;
2619         gchar *root_folder = NULL;
2620
2621         g_return_val_if_fail(folder != NULL, -1);
2622         g_return_val_if_fail(folder->account != NULL, -1);
2623
2624         debug_print("getting session...\n");
2625         session = imap_session_get(folder);
2626         if (!session) {
2627                 if (!folder->node) {
2628                         folder_tree_destroy(folder);
2629                         item = folder_item_new(folder, folder->name, NULL);
2630                         item->folder = folder;
2631                         folder->node = item->node = g_node_new(item);
2632                 }
2633                 return -1;
2634         }
2635
2636         if (folder->account->imap_dir && *folder->account->imap_dir) {
2637                 gchar *real_path;
2638                 int r = MAILIMAP_NO_ERROR;
2639                 clist * lep_list;
2640
2641                 Xstrdup_a(root_folder, folder->account->imap_dir, {return -1;});
2642                 extract_quote(root_folder, '"');
2643                 subst_char(root_folder,
2644                            imap_get_path_separator(session, IMAP_FOLDER(folder),
2645                                                    root_folder, &r),
2646                            '/');
2647                 if (is_fatal(r))
2648                         return -1;
2649                 strtailchomp(root_folder, '/');
2650                 real_path = imap_get_real_path
2651                         (session, IMAP_FOLDER(folder), root_folder, &r);
2652                 if (is_fatal(r)) {
2653                         g_free(real_path);
2654                         return -1;
2655                 }
2656                 debug_print("IMAP root directory: %s\n", real_path);
2657
2658                 /* check if root directory exist */
2659
2660                 r = imap_threaded_list(session->folder, "", real_path,
2661                                        &lep_list);
2662
2663                 if (r != MAILIMAP_NO_ERROR)
2664                         imap_handle_error(SESSION(session), NULL, r);
2665
2666                 if ((r != MAILIMAP_NO_ERROR) || (clist_count(lep_list) == 0)) {
2667                         if (!folder->node) {
2668                                 item = folder_item_new(folder, folder->name, NULL);
2669                                 item->folder = folder;
2670                                 folder->node = item->node = g_node_new(item);
2671                         }
2672                         return -1;
2673                 }
2674                 mailimap_list_result_free(lep_list);
2675
2676                 g_free(real_path);
2677         }
2678
2679         if (folder->node)
2680                 item = FOLDER_ITEM(folder->node->data);
2681
2682         if (item && !item->path && root_folder) {
2683                 item->path = g_strdup(root_folder);
2684         }
2685
2686         if (!item || ((item->path || root_folder) &&
2687                       strcmp2(item->path, root_folder) != 0)) {
2688                 folder_tree_destroy(folder);
2689                 item = folder_item_new(folder, folder->name, root_folder);
2690                 item->folder = folder;
2691                 folder->node = item->node = g_node_new(item);
2692         }
2693
2694         imap_scan_tree_recursive(session, FOLDER_ITEM(folder->node->data), subs_only);
2695         imap_create_missing_folders(folder);
2696
2697         return 0;
2698 }
2699
2700 static gint imap_scan_tree(Folder *folder)
2701 {
2702         gboolean subs_only = FALSE;
2703         if (folder->account) {
2704                 debug_print(" scanning only subs %d\n", folder->account->imap_subsonly);
2705                 subs_only = folder->account->imap_subsonly;
2706         }
2707         return imap_scan_tree_real(folder, subs_only);
2708 }
2709
2710 static gint imap_scan_tree_recursive(IMAPSession *session, FolderItem *item, gboolean subs_only)
2711 {
2712         Folder *folder;
2713         IMAPFolder *imapfolder;
2714         FolderItem *new_item;
2715         GSList *item_list, *cur;
2716         GNode *node;
2717         gchar *real_path;
2718         gchar *wildcard_path;
2719         gchar separator;
2720         gchar wildcard[3];
2721         clist * lep_list;
2722         int r = MAILIMAP_NO_ERROR;
2723
2724         g_return_val_if_fail(item != NULL, -1);
2725         g_return_val_if_fail(item->folder != NULL, -1);
2726         g_return_val_if_fail(item->no_sub == FALSE, -1);
2727
2728         folder = item->folder;
2729         imapfolder = IMAP_FOLDER(folder);
2730
2731         separator = imap_get_path_separator(session, imapfolder, item->path, &r);
2732         if (is_fatal(r))
2733                 return r;
2734
2735         if (folder->ui_func)
2736                 folder->ui_func(folder, item, folder->ui_func_data);
2737
2738         if (item->path) {
2739                 wildcard[0] = separator;
2740                 wildcard[1] = '%';
2741                 wildcard[2] = '\0';
2742                 real_path = imap_get_real_path(session, imapfolder, item->path, &r);
2743                 if (is_fatal(r)) {
2744                         g_free(real_path);
2745                         return r;
2746                 }
2747         } else {
2748                 wildcard[0] = '%';
2749                 wildcard[1] = '\0';
2750                 real_path = g_strdup("");
2751         }
2752
2753         Xstrcat_a(wildcard_path, real_path, wildcard,
2754                   {g_free(real_path); return MAILIMAP_ERROR_BAD_STATE;});
2755         lep_list = NULL;
2756
2757         if (subs_only)
2758                 r = imap_threaded_lsub(folder, "", wildcard_path, &lep_list);
2759         else
2760                 r = imap_threaded_list(folder, "", wildcard_path, &lep_list);
2761
2762         if (r != MAILIMAP_NO_ERROR) {
2763                 imap_handle_error(SESSION(session), NULL, r);
2764                 item_list = NULL;
2765                 g_free(real_path);
2766                 return r;
2767         }
2768         else {
2769                 item_list = imap_list_from_lep(imapfolder,
2770                                                lep_list, real_path, FALSE);
2771                 mailimap_list_result_free(lep_list);
2772         }
2773
2774         g_free(real_path);
2775
2776         node = item->node->children;
2777         while (node != NULL) {
2778                 FolderItem *old_item = FOLDER_ITEM(node->data);
2779                 GNode *next = node->next;
2780
2781                 new_item = NULL;
2782                 for (cur = item_list; cur != NULL; cur = cur->next) {
2783                         FolderItem *cur_item = FOLDER_ITEM(cur->data);
2784                         if (!strcmp2(old_item->path, cur_item->path)) {
2785                                 new_item = cur_item;
2786                                 break;
2787                         }
2788                 }
2789                 if (!new_item) {
2790                         if (old_item && old_item->path && !strcasecmp(old_item->path, "INBOX")) {
2791                                 debug_print("not removing INBOX\n");
2792                         } else {
2793                                 debug_print("folder '%s' not found. removing...\n",
2794                                             old_item->path);
2795                                 folder_item_remove(old_item);
2796                         }
2797                 } else {
2798                         old_item->no_sub = new_item->no_sub;
2799                         old_item->no_select = new_item->no_select;
2800                         if (old_item->no_sub == TRUE && node->children) {
2801                                 debug_print("folder '%s' doesn't have "
2802                                             "subfolders. removing...\n",
2803                                             old_item->path);
2804                                 folder_item_remove_children(old_item);
2805                         }
2806                 }
2807
2808                 node = next;
2809         }
2810
2811         for (cur = item_list; cur != NULL; cur = cur->next) {
2812                 FolderItem *cur_item = FOLDER_ITEM(cur->data);
2813                 new_item = NULL;
2814
2815                 for (node = item->node->children; node != NULL;
2816                      node = node->next) {
2817                         if (!strcmp2(FOLDER_ITEM(node->data)->path,
2818                                      cur_item->path)) {
2819                                 new_item = FOLDER_ITEM(node->data);
2820                                 folder_item_destroy(cur_item);
2821                                 cur_item = NULL;
2822                                 break;
2823                         }
2824                 }
2825                 if (!new_item) {
2826                         new_item = cur_item;
2827                         debug_print("new folder '%s' found.\n", new_item->path);
2828                         folder_item_append(item, new_item);
2829                 }
2830
2831                 if (!strcasecmp(new_item->path, "INBOX")) {
2832                         new_item->stype = F_INBOX;
2833                         folder->inbox = new_item;
2834                 } else if (!folder_item_parent(item) || item->stype == F_INBOX) {
2835                         gchar *base;
2836
2837                         base = g_path_get_basename(new_item->path);
2838
2839                         if (!folder->outbox && !g_ascii_strcasecmp(base, "Sent")) {
2840                                 new_item->stype = F_OUTBOX;
2841                                 folder->outbox = new_item;
2842                         } else if (!folder->draft && (!g_ascii_strcasecmp(base, "Drafts") || !g_ascii_strcasecmp(base, "Draft"))) {
2843                                 new_item->stype = F_DRAFT;
2844                                 folder->draft = new_item;
2845                         } else if (!folder->queue && !g_ascii_strcasecmp(base, "Queue")) {
2846                                 new_item->stype = F_QUEUE;
2847                                 folder->queue = new_item;
2848                         } else if (!folder->trash && !g_ascii_strcasecmp(base, "Trash")) {
2849                                 new_item->stype = F_TRASH;
2850                                 folder->trash = new_item;
2851                         }
2852                         g_free(base);
2853                 }
2854
2855                 if (new_item->no_sub == FALSE)
2856                         imap_scan_tree_recursive(session, new_item, subs_only);
2857         }
2858
2859         g_slist_free(item_list);
2860
2861         return MAILIMAP_NO_ERROR;
2862 }
2863
2864 GList *imap_scan_subtree(Folder *folder, FolderItem *item, gboolean unsubs_only, gboolean recursive)
2865 {
2866         IMAPSession *session = imap_session_get(folder);
2867         gchar *real_path;
2868         gchar *wildcard_path;
2869         gchar separator;
2870         gchar wildcard[3];
2871         clist * lep_list;
2872         GSList *item_list = NULL, *cur;
2873         GList *child_list = NULL, *tmplist = NULL;
2874         GSList *sub_list = NULL;
2875         int r = MAILIMAP_NO_ERROR;
2876
2877         if (!session)
2878                 return NULL;
2879
2880         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &r);
2881         if (is_fatal(r))
2882                 return NULL;
2883
2884         if (item->path) {
2885                 wildcard[0] = separator;
2886                 wildcard[1] = '%';
2887                 wildcard[2] = '\0';
2888                 real_path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &r);
2889                 if (is_fatal(r)) {
2890                         g_free(real_path);
2891                         return NULL;
2892                 }
2893         } else {
2894                 wildcard[0] = '%';
2895                 wildcard[1] = '\0';
2896                 real_path = g_strdup("");
2897         }
2898
2899         Xstrcat_a(wildcard_path, real_path, wildcard,
2900                   {g_free(real_path); return NULL;});
2901         lep_list = NULL;
2902
2903         if (unsubs_only)
2904                 statusbar_print_all(_("Looking for unsubscribed folders in %s..."),
2905                                 item->path?item->path:item->name);
2906         else
2907                 statusbar_print_all(_("Looking for subfolders of %s..."),
2908                                 item->path?item->path:item->name);
2909
2910         r = imap_threaded_list(folder, "", wildcard_path, &lep_list);
2911         if (r) {
2912                 g_free(real_path);
2913                 statusbar_pop_all();
2914                 return NULL;
2915         }
2916         item_list = imap_list_from_lep(IMAP_FOLDER(folder),
2917                                lep_list, real_path, FALSE);
2918         mailimap_list_result_free(lep_list);
2919
2920         for (cur = item_list; cur != NULL; cur = cur->next) {
2921                 FolderItem *cur_item = FOLDER_ITEM(cur->data);
2922                 if (recursive) {
2923                         tmplist = imap_scan_subtree(folder, cur_item,
2924                                         unsubs_only, recursive);
2925                         if (tmplist)
2926                                 child_list = g_list_concat(child_list, tmplist);
2927                 }
2928                 child_list = g_list_prepend(child_list,
2929                                 imap_get_real_path(session,
2930                                         IMAP_FOLDER(folder), cur_item->path, &r));
2931                 if (is_fatal(r)) {
2932                         g_free(real_path);
2933                         statusbar_pop_all();
2934                         return NULL;
2935                 }
2936                 folder_item_destroy(cur_item);
2937         }
2938         child_list = g_list_reverse(child_list);
2939         g_slist_free(item_list);
2940
2941         if (unsubs_only) {
2942                 r = imap_threaded_lsub(folder, "", wildcard_path, &lep_list);
2943                 if (r) {
2944                         g_free(real_path);
2945                         statusbar_pop_all();
2946                         return NULL;
2947                 }
2948                 sub_list = imap_list_from_lep(IMAP_FOLDER(folder),
2949                                        lep_list, real_path, FALSE);
2950                 mailimap_list_result_free(lep_list);
2951
2952                 for (cur = sub_list; cur != NULL; cur = cur->next) {
2953                         FolderItem *cur_item = FOLDER_ITEM(cur->data);
2954                         GList *oldlitem = NULL;
2955                         gchar *tmp = imap_get_real_path(session,
2956                                         IMAP_FOLDER(folder), cur_item->path, &r);
2957                         if (r) {
2958                                 g_free(real_path);
2959                                 statusbar_pop_all();
2960                                 g_free(tmp);
2961                                 return NULL;
2962                         }
2963                         folder_item_destroy(cur_item);
2964                         oldlitem = g_list_find_custom(
2965                                         child_list, tmp, (GCompareFunc)strcmp2);
2966                         if (oldlitem) {
2967                                 child_list = g_list_remove_link(child_list, oldlitem);
2968                                 g_free(oldlitem->data);
2969                                 g_list_free(oldlitem);
2970                         }
2971                         g_free(tmp);
2972                 }
2973         }
2974
2975         g_free(real_path);
2976         statusbar_pop_all();
2977
2978         return child_list;
2979 }
2980
2981 static gint imap_create_tree(Folder *folder)
2982 {
2983         g_return_val_if_fail(folder != NULL, -1);
2984         g_return_val_if_fail(folder->node != NULL, -1);
2985         g_return_val_if_fail(folder->node->data != NULL, -1);
2986         g_return_val_if_fail(folder->account != NULL, -1);
2987
2988         imap_scan_tree(folder);
2989         imap_create_missing_folders(folder);
2990
2991         return 0;
2992 }
2993
2994 static void imap_create_missing_folders(Folder *folder)
2995 {
2996         g_return_if_fail(folder != NULL);
2997
2998         if (!folder->inbox)
2999                 folder->inbox = imap_create_special_folder
3000                         (folder, F_INBOX, "INBOX");
3001         if (!folder->trash)
3002                 folder->trash = imap_create_special_folder
3003                         (folder, F_TRASH, "Trash");
3004         if (!folder->queue)
3005                 folder->queue = imap_create_special_folder
3006                         (folder, F_QUEUE, "Queue");
3007         if (!folder->outbox)
3008                 folder->outbox = imap_create_special_folder
3009                         (folder, F_OUTBOX, "Sent");
3010         if (!folder->draft)
3011                 folder->draft = imap_create_special_folder
3012                         (folder, F_DRAFT, "Drafts");
3013 }
3014
3015 static FolderItem *imap_create_special_folder(Folder *folder,
3016                                               SpecialFolderItemType stype,
3017                                               const gchar *name)
3018 {
3019         FolderItem *item;
3020         FolderItem *new_item;
3021
3022         g_return_val_if_fail(folder != NULL, NULL);
3023         g_return_val_if_fail(folder->node != NULL, NULL);
3024         g_return_val_if_fail(folder->node->data != NULL, NULL);
3025         g_return_val_if_fail(folder->account != NULL, NULL);
3026         g_return_val_if_fail(name != NULL, NULL);
3027
3028         item = FOLDER_ITEM(folder->node->data);
3029         new_item = imap_create_folder(folder, item, name);
3030
3031         if (!new_item) {
3032                 g_warning("Can't create '%s'", name);
3033                 if (!folder->inbox) return NULL;
3034
3035                 new_item = imap_create_folder(folder, folder->inbox, name);
3036                 if (!new_item)
3037                         g_warning("Can't create '%s' under INBOX", name);
3038                 else
3039                         new_item->stype = stype;
3040         } else
3041                 new_item->stype = stype;
3042
3043         return new_item;
3044 }
3045
3046 static gchar *imap_folder_get_path(Folder *folder)
3047 {
3048         gchar *folder_path;
3049
3050         g_return_val_if_fail(folder != NULL, NULL);
3051         g_return_val_if_fail(folder->account != NULL, NULL);
3052
3053 #ifdef G_OS_WIN32
3054         gchar *sanitized_dirname = g_strdup(folder->account->recv_server);
3055         g_strdelimit(sanitized_dirname, ":", ',');
3056 #endif
3057
3058         folder_path = g_strconcat(get_imap_cache_dir(),
3059                                   G_DIR_SEPARATOR_S,
3060 #ifdef G_OS_WIN32
3061                                                                                                                                         sanitized_dirname,
3062 #else
3063                                   folder->account->recv_server,
3064 #endif
3065                                   G_DIR_SEPARATOR_S,
3066                                   folder->account->userid,
3067                                   NULL);
3068
3069 #ifdef G_OS_WIN32
3070         g_free(sanitized_dirname);
3071 #endif
3072         return folder_path;
3073 }
3074
3075 #ifdef G_OS_WIN32
3076 static gchar *imap_encode_unsafe_chars(const gchar *str)
3077 {
3078         gchar *ret = NULL, *o_ret;
3079         gchar *i;
3080         if (!str)
3081                 return NULL;
3082         ret = g_malloc(3*strlen(str)+1);
3083         o_ret = ret;
3084         for (i = (gchar *)str; *i; i++) {
3085                 switch(*i) {
3086                         case ':':
3087                         case '|':
3088                         case '<':
3089                         case '>':
3090                         case '*':
3091                         case '?':
3092                         case '#':
3093                                 *ret++ = '%';
3094                                 *ret++ = '0'+(*i/10);
3095                                 *ret++ = '0'+(*i%10);
3096                                 break;
3097                         default:
3098                                 *ret++ = *i;
3099                 }
3100         }
3101         *ret++ = '\0';
3102         return o_ret;
3103 }
3104 #endif
3105 static gchar *imap_item_get_path(Folder *folder, FolderItem *item)
3106 {
3107         gchar *folder_path, *path;
3108         gchar *item_path = NULL;
3109
3110         g_return_val_if_fail(folder != NULL, NULL);
3111         g_return_val_if_fail(item != NULL, NULL);
3112         folder_path = imap_folder_get_path(folder);
3113
3114         g_return_val_if_fail(folder_path != NULL, NULL);
3115
3116 #ifdef G_OS_UNIX
3117         item_path = g_strdup(item->path);
3118 #else
3119         item_path = imap_encode_unsafe_chars(item->path);
3120 #endif
3121
3122         if (g_path_is_absolute(folder_path)) {
3123                 if (item_path)
3124                         path = g_strconcat(folder_path, G_DIR_SEPARATOR_S,
3125                                            item_path, NULL);
3126                 else
3127                         path = g_strdup(folder_path);
3128         } else {
3129                 if (item_path)
3130                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
3131                                            folder_path, G_DIR_SEPARATOR_S,
3132                                            item_path, NULL);
3133                 else
3134                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
3135                                            folder_path, NULL);
3136         }
3137         g_free(folder_path);
3138         g_free(item_path);
3139 #ifdef G_OS_WIN32
3140         while (strchr(path, '/'))
3141                 *strchr(path, '/') = '\\';
3142 #endif
3143
3144         return path;
3145 }
3146
3147 static FolderItem *imap_create_folder(Folder *folder, FolderItem *parent,
3148                                const gchar *name)
3149 {
3150         gchar *dirpath, *imap_path;
3151         IMAPSession *session;
3152         FolderItem *new_item;
3153         gchar separator;
3154         gchar *new_name;
3155         const gchar *p;
3156         gint ok = MAILIMAP_NO_ERROR;
3157         gboolean no_select = FALSE, no_sub = FALSE;
3158         gboolean exist = FALSE;
3159
3160         g_return_val_if_fail(folder != NULL, NULL);
3161         g_return_val_if_fail(folder->account != NULL, NULL);
3162         g_return_val_if_fail(parent != NULL, NULL);
3163         g_return_val_if_fail(name != NULL, NULL);
3164
3165         if (to_number(name) > 0) {
3166                 gchar *cached_msg = imap_get_cached_filename(parent, to_number(name));
3167                 if (is_file_exist(cached_msg)) {
3168                         if (claws_unlink(cached_msg) != 0) {
3169                                 return NULL;
3170                         }
3171                 }
3172         }
3173
3174         debug_print("getting session...\n");
3175         session = imap_session_get(folder);
3176         if (!session) {
3177                 return NULL;
3178         }
3179
3180         if (!folder_item_parent(parent) && strcasecmp(name, "INBOX") == 0) {
3181                 dirpath = g_strdup(name);
3182         }else if (parent->path)
3183                 dirpath = g_strconcat(parent->path, "/", name, NULL);
3184         else if ((p = strchr(name, '/')) != NULL && *(p + 1) != '\0')
3185                 dirpath = g_strdup(name);
3186         else if (folder->account->imap_dir && *folder->account->imap_dir) {
3187                 gchar *imap_dir;
3188
3189                 Xstrdup_a(imap_dir, folder->account->imap_dir, {return NULL;});
3190                 strtailchomp(imap_dir, '/');
3191                 dirpath = g_strconcat(imap_dir, "/", name, NULL);
3192         } else
3193                 dirpath = g_strdup(name);
3194
3195
3196
3197         /* keep trailing directory separator to create a folder that contains
3198            sub folder */
3199         imap_path = imap_utf8_to_modified_utf7(dirpath, FALSE);
3200
3201         strtailchomp(dirpath, '/');
3202         Xstrdup_a(new_name, name, {
3203                 g_free(dirpath);
3204                 g_free(imap_path);
3205                 return NULL;});
3206
3207         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), imap_path, &ok);
3208         if (is_fatal(ok)) {
3209                 g_free(imap_path);
3210                 return NULL;
3211         }
3212         imap_path_separator_subst(imap_path, separator);
3213         /* remove trailing / for display */
3214         strtailchomp(new_name, '/');
3215
3216         if (strcasecmp(dirpath, "INBOX") != 0) {
3217                 GPtrArray *argbuf;
3218                 int r;
3219                 clist * lep_list;
3220
3221                 argbuf = g_ptr_array_new();
3222                 r = imap_threaded_list(folder, "", imap_path, &lep_list);
3223                 if (r != MAILIMAP_NO_ERROR) {
3224                         imap_handle_error(SESSION(session), NULL, r);
3225                         log_warning(LOG_PROTOCOL, _("can't create mailbox: LIST failed\n"));
3226                         g_free(imap_path);
3227                         g_free(dirpath);
3228                         ptr_array_free_strings(argbuf);
3229                         g_ptr_array_free(argbuf, TRUE);
3230                         return NULL;
3231                 }
3232
3233                 if (clist_count(lep_list) > 0)
3234                         exist = TRUE;
3235                 mailimap_list_result_free(lep_list);
3236                 lep_list = NULL;
3237                 if (!exist) {
3238                         ok = imap_cmd_create(session, imap_path);
3239                         if (ok != MAILIMAP_NO_ERROR) {
3240                                 log_warning(LOG_PROTOCOL, _("can't create mailbox\n"));
3241                                 g_free(imap_path);
3242                                 g_free(dirpath);
3243                                 return NULL;
3244                         }
3245                         r = imap_threaded_list(folder, "", imap_path, &lep_list);
3246                         if (r == MAILIMAP_NO_ERROR) {
3247                                 GSList *item_list = imap_list_from_lep(IMAP_FOLDER(folder),
3248                                                lep_list, dirpath, TRUE);
3249                                 if (item_list) {
3250                                         FolderItem *cur_item = FOLDER_ITEM(item_list->data);
3251                                         no_select = cur_item->no_select;
3252                                         no_sub = cur_item->no_sub;
3253                                         g_slist_free(item_list);
3254                                 }
3255                                 mailimap_list_result_free(lep_list);
3256                         } else {
3257                                 imap_handle_error(SESSION(session), NULL, r);
3258                         }
3259                 }
3260                 imap_threaded_subscribe(folder, imap_path, TRUE);
3261         } else {
3262                 clist *lep_list;
3263                 int r;
3264                 /* just get flags */
3265                 r = imap_threaded_list(folder, "", "INBOX", &lep_list);
3266                 if (r == MAILIMAP_NO_ERROR) {
3267                         GSList *item_list = imap_list_from_lep(IMAP_FOLDER(folder),
3268                                        lep_list, dirpath, TRUE);
3269                         if (item_list) {
3270                                 FolderItem *cur_item = FOLDER_ITEM(item_list->data);
3271                                 no_select = cur_item->no_select;
3272                                 no_sub = cur_item->no_sub;
3273                                 g_slist_free(item_list);
3274                         }
3275                         mailimap_list_result_free(lep_list);
3276                 } else {
3277                         imap_handle_error(SESSION(session), NULL, r);
3278                 }
3279         }
3280
3281         new_item = folder_item_new(folder, new_name, dirpath);
3282         new_item->no_select = no_select;
3283         new_item->no_sub = no_sub;
3284         folder_item_append(parent, new_item);
3285         g_free(imap_path);
3286         g_free(dirpath);
3287
3288         dirpath = folder_item_get_path(new_item);
3289         if (!is_dir_exist(dirpath))
3290                 make_dir_hier(dirpath);
3291         g_free(dirpath);
3292
3293         if (exist) {
3294                 /* folder existed, scan it */
3295                 imap_scan_required(folder, new_item);
3296                 folder_item_scan_full(new_item, FALSE);
3297         }
3298
3299         return new_item;
3300 }
3301
3302 static gint imap_rename_folder(Folder *folder, FolderItem *item,
3303                                const gchar *name)
3304 {
3305         gchar *dirpath;
3306         gchar *newpath;
3307         gchar *real_oldpath;
3308         gchar *real_newpath;
3309         gchar *paths[2];
3310         gchar *old_cache_dir;
3311         gchar *new_cache_dir;
3312         IMAPSession *session;
3313         gchar separator;
3314         gint ok = MAILIMAP_NO_ERROR;
3315         gint exists, recent, unseen;
3316         guint32 uid_validity;
3317
3318         g_return_val_if_fail(folder != NULL, -1);
3319         g_return_val_if_fail(item != NULL, -1);
3320         g_return_val_if_fail(item->path != NULL, -1);
3321         g_return_val_if_fail(name != NULL, -1);
3322
3323         debug_print("getting session...\n");
3324         session = imap_session_get(folder);
3325         if (!session) {
3326                 return -1;
3327         }
3328
3329         if (strchr(name, imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &ok)) != NULL ||
3330                 is_fatal(ok)) {
3331                 g_warning("New folder name must not contain the namespace "
3332                             "path separator");
3333                 return -1;
3334         }
3335
3336         real_oldpath = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &ok);
3337         if (is_fatal(ok)) {
3338                 g_free(real_oldpath);
3339                 return -1;
3340         }
3341
3342         g_free(session->mbox);
3343         session->mbox = NULL;
3344         session->exists = 0;
3345         session->recent = 0;
3346         session->expunge = 0;
3347         ok = imap_cmd_examine(session, "INBOX",
3348                               &exists, &recent, &unseen, &uid_validity, FALSE);
3349         if (ok != MAILIMAP_NO_ERROR) {
3350                 g_free(real_oldpath);
3351                 return -1;
3352         }
3353
3354         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &ok);
3355         if (is_fatal(ok)) {
3356                 g_free(real_oldpath);
3357                 return -1;
3358         }
3359         if (strchr(item->path, '/')) {
3360                 dirpath = g_path_get_dirname(item->path);
3361                 newpath = g_strconcat(dirpath, "/", name, NULL);
3362                 g_free(dirpath);
3363         } else
3364                 newpath = g_strdup(name);
3365
3366         real_newpath = imap_utf8_to_modified_utf7(newpath, FALSE);
3367         imap_path_separator_subst(real_newpath, separator);
3368
3369         ok = imap_cmd_rename(session, real_oldpath, real_newpath);
3370         if (ok != MAILIMAP_NO_ERROR) {
3371                 log_warning(LOG_PROTOCOL, _("can't rename mailbox: %s to %s\n"),
3372                             real_oldpath, real_newpath);
3373                 g_free(real_oldpath);
3374                 g_free(newpath);
3375                 g_free(real_newpath);
3376                 return -1;
3377         }
3378         g_free(item->name);
3379         item->name = g_strdup(name);
3380
3381         old_cache_dir = folder_item_get_path(item);
3382
3383         paths[0] = g_strdup(item->path);
3384         paths[1] = newpath;
3385         g_node_traverse(item->node, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
3386                         imap_rename_folder_func, paths);
3387
3388         if (is_dir_exist(old_cache_dir)) {
3389                 new_cache_dir = folder_item_get_path(item);
3390                 if (g_rename(old_cache_dir, new_cache_dir) < 0) {
3391                         FILE_OP_ERROR(old_cache_dir, "rename");
3392                 }
3393                 g_free(new_cache_dir);
3394         }
3395
3396         g_free(old_cache_dir);
3397         g_free(paths[0]);
3398         g_free(newpath);
3399         g_free(real_oldpath);
3400         g_free(real_newpath);
3401         return 0;
3402 }
3403
3404 gint imap_subscribe(Folder *folder, FolderItem *item, gchar *rpath, gboolean sub)
3405 {
3406         gchar *path;
3407         gint r = MAILIMAP_NO_ERROR;
3408         IMAPSession *session;
3409         debug_print("getting session...\n");
3410
3411         session = imap_session_get(folder);
3412         if (!session) {
3413                 return -1;
3414         }
3415         if (item && item->path) {
3416                 path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &r);
3417                 if (!path)
3418                         return -1;
3419                 if (is_fatal(r)) {
3420                         g_free(path);
3421                         return -1;
3422                 }
3423                 if (!strcasecmp(path, "INBOX") && sub == FALSE) {
3424                         g_free(path);
3425                         return -1;
3426                 }
3427                 debug_print("%ssubscribing %s\n", sub?"":"un", path);
3428                 r = imap_threaded_subscribe(folder, path, sub);
3429                 g_free(path);
3430         } else if (rpath) {
3431                 r = imap_threaded_subscribe(folder, rpath, sub);
3432         } else
3433                 return -1;
3434         return r;
3435 }
3436
3437 static gint imap_remove_folder_real(Folder *folder, FolderItem *item)
3438 {
3439         gint ok = MAILIMAP_NO_ERROR;
3440         IMAPSession *session;
3441         gchar *path;
3442         gchar *cache_dir;
3443         gboolean selected_folder;
3444
3445         g_return_val_if_fail(folder != NULL, -1);
3446         g_return_val_if_fail(item != NULL, -1);
3447         g_return_val_if_fail(item->path != NULL, -1);
3448
3449         debug_print("getting session...\n");
3450         session = imap_session_get(folder);
3451         if (!session) {
3452                 return -1;
3453         }
3454         path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &ok);
3455         if (is_fatal(ok)) {
3456                 g_free(path);
3457                 return -1;
3458         }
3459         imap_threaded_subscribe(folder, path, FALSE);
3460
3461         selected_folder = (session->mbox != NULL) &&
3462                           (!strcmp(session->mbox, item->path));
3463         if (selected_folder) {
3464                 ok = imap_cmd_close(session);
3465                 if (ok != MAILIMAP_NO_ERROR) {
3466                         debug_print("close err %d\n", ok);
3467                         return ok;
3468                 }
3469         }
3470         ok = imap_cmd_delete(session, path);
3471         if (ok != MAILIMAP_NO_ERROR && !is_fatal(ok)) {
3472                 gchar *tmp = NULL;
3473
3474                 ok = MAILIMAP_NO_ERROR;
3475                 tmp = g_strdup_printf("%s%c", path,
3476                                 imap_get_path_separator(session, IMAP_FOLDER(folder), path, &ok));
3477                 g_free(path);
3478                 path = tmp;
3479                 if (!is_fatal(ok))
3480                         ok = imap_cmd_delete(session, path);
3481         }
3482
3483         if (ok != MAILIMAP_NO_ERROR) {
3484                 log_warning(LOG_PROTOCOL, _("can't delete mailbox\n"));
3485                 g_free(path);
3486                 return -1;
3487         }
3488
3489         g_free(path);
3490         cache_dir = folder_item_get_path(item);
3491         if (is_dir_exist(cache_dir) && remove_dir_recursive(cache_dir) < 0)
3492                 g_warning("can't remove directory '%s'", cache_dir);
3493         g_free(cache_dir);
3494         folder_item_remove(item);
3495         return 0;
3496 }
3497
3498 static gint imap_remove_folder(Folder *folder, FolderItem *item)
3499 {
3500         GNode *node, *next;
3501
3502         g_return_val_if_fail(item != NULL, -1);
3503         g_return_val_if_fail(item->folder != NULL, -1);
3504         g_return_val_if_fail(item->node != NULL, -1);
3505
3506         node = item->node->children;
3507         while (node != NULL) {
3508                 next = node->next;
3509                 if (imap_remove_folder(folder, FOLDER_ITEM(node->data)) < 0)
3510                         return -1;
3511                 node = next;
3512         }
3513         debug_print("IMAP removing %s\n", item->path);
3514
3515         if (imap_remove_all_msg(folder, item) < 0)
3516                 return -1;
3517         return imap_remove_folder_real(folder, item);
3518 }
3519
3520 typedef struct _uncached_data {
3521         IMAPSession *session;
3522         FolderItem *item;
3523         MsgNumberList *numlist;
3524         guint cur;
3525         guint total;
3526         gboolean done;
3527         int ok;
3528 } uncached_data;
3529
3530 static void *imap_get_uncached_messages_thread(void *data)
3531 {
3532         uncached_data *stuff = (uncached_data *)data;
3533         IMAPSession *session = stuff->session;
3534         FolderItem *item = stuff->item;
3535         MsgNumberList *numlist = stuff->numlist;
3536         GSList *newlist = NULL;
3537         GSList *llast = NULL;
3538         GSList *seq_list, *cur;
3539         gboolean got_alien_tags = FALSE;
3540
3541         debug_print("uncached_messages\n");
3542
3543         if (session == NULL || item == NULL || item->folder == NULL
3544             || FOLDER_CLASS(item->folder) != &imap_class) {
3545                 stuff->done = TRUE;
3546                 return NULL;
3547         }
3548
3549         seq_list = imap_get_lep_set_from_numlist(IMAP_FOLDER(item->folder), numlist);
3550         debug_print("get msgs info\n");
3551         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
3552                 struct mailimap_set * imapset;
3553                 unsigned int i;
3554                 int r;
3555                 carray * env_list;
3556                 int count;
3557
3558                 if (session->cancelled)
3559                         break;
3560
3561                 imapset = cur->data;
3562
3563                 r = imap_threaded_fetch_env(session->folder,
3564                                             imapset, &env_list);
3565                 if (r != MAILIMAP_NO_ERROR) {
3566                         imap_handle_error(SESSION(session), NULL, r);
3567                         if (is_fatal(r)) {
3568                                 stuff->ok = r;
3569                                 return NULL;
3570                         }
3571                         continue;
3572                 }
3573
3574                 session_set_access_time(SESSION(session));
3575
3576                 count = 0;
3577                 for(i = 0 ; i < carray_count(env_list) ; i += 2) {
3578                         struct imap_fetch_env_info * info;
3579                         MsgInfo * msginfo;
3580                         GSList *tags = NULL, *cur = NULL;
3581                         info = carray_get(env_list, i);
3582                         tags = carray_get(env_list, i+1);
3583                         msginfo = imap_envelope_from_lep(info, item);
3584                         if (msginfo == NULL) {
3585                                 slist_free_strings_full(tags);
3586                                 continue;
3587                         }
3588                         g_slist_free(msginfo->tags);
3589                         msginfo->tags = NULL;
3590
3591                         for (cur = tags; cur; cur = cur->next) {
3592                                 gchar *real_tag = imap_modified_utf7_to_utf8(cur->data, TRUE);
3593                                 gint id = 0;
3594                                 id = tags_get_id_for_str(real_tag);
3595                                 if (id == -1) {
3596                                         id = tags_add_tag(real_tag);
3597                                         got_alien_tags = TRUE;
3598                                 }
3599                                 if (!g_slist_find(msginfo->tags, GINT_TO_POINTER(id))) {
3600                                         msginfo->tags = g_slist_prepend(
3601                                                         msginfo->tags,
3602                                                         GINT_TO_POINTER(id));
3603                                 }
3604                                 g_free(real_tag);
3605                         }
3606                         if (msginfo->tags)
3607                                 msginfo->tags = g_slist_reverse(msginfo->tags);
3608                         slist_free_strings_full(tags);
3609                         msginfo->folder = item;
3610                         if (!newlist)
3611                                 llast = newlist = g_slist_append(newlist, msginfo);
3612                         else {
3613                                 llast = g_slist_append(llast, msginfo);
3614                                 llast = llast->next;
3615                         }
3616                         count ++;
3617                 }
3618
3619                 imap_fetch_env_free(env_list);
3620         }
3621
3622         if (got_alien_tags) {
3623                 tags_write_tags();
3624                 main_window_reflect_tags_changes(mainwindow_get_mainwindow());
3625         }
3626
3627         imap_lep_set_free(seq_list);
3628
3629         session_set_access_time(SESSION(session));
3630         stuff->done = TRUE;
3631         return newlist;
3632 }
3633
3634 #define MAX_MSG_NUM 50
3635
3636 static GSList *imap_get_uncached_messages(IMAPSession *session,
3637                                         FolderItem *item,
3638                                         MsgNumberList *numlist,
3639                                         int *r)
3640 {
3641         GSList *result = NULL;
3642         GSList * cur;
3643         uncached_data *data = g_new0(uncached_data, 1);
3644
3645         cur = numlist;
3646         data->total = g_slist_length(numlist);
3647         data->ok = MAILIMAP_NO_ERROR;
3648         debug_print("messages list : %i\n", data->total);
3649
3650         while (cur != NULL) {
3651                 GSList * partial_result;
3652                 int count;
3653                 GSList * newlist;
3654                 GSList * llast;
3655
3656                 llast = NULL;
3657                 count = 0;
3658                 newlist = NULL;
3659                 while (count < MAX_MSG_NUM) {
3660                         void * p;
3661
3662                         p = cur->data;
3663
3664                         if (newlist == NULL)
3665                                 llast = newlist = g_slist_append(newlist, p);
3666                         else {
3667                                 llast = g_slist_append(llast, p);
3668                                 llast = llast->next;
3669                         }
3670                         count ++;
3671
3672                         cur = cur->next;
3673                         if (cur == NULL)
3674                                 break;
3675                 }
3676
3677                 data->done = FALSE;
3678                 data->session = session;
3679                 data->item = item;
3680                 data->numlist = newlist;
3681                 data->cur += count;
3682
3683                 if (prefs_common.work_offline &&
3684                     !inc_offline_should_override(FALSE,
3685                         _("Claws Mail needs network access in order "
3686                           "to access the IMAP server."))) {
3687                         g_free(data);
3688                         return NULL;
3689                 }
3690
3691                 partial_result =
3692                         (GSList *)imap_get_uncached_messages_thread(data);
3693                 *r = data->ok;
3694                 if (data->ok != MAILIMAP_NO_ERROR) {
3695                         goto bail;
3696                 }
3697                 statusbar_progress_all(data->cur,data->total, 1);
3698
3699                 g_slist_free(newlist);
3700
3701                 result = g_slist_concat(result, partial_result);
3702         }
3703 bail:
3704         g_free(data);
3705
3706         statusbar_progress_all(0,0,0);
3707         statusbar_pop_all();
3708
3709         return result;
3710 }
3711
3712 static void imap_delete_all_cached_messages(FolderItem *item)
3713 {
3714         gchar *dir;
3715
3716         g_return_if_fail(item != NULL);
3717         g_return_if_fail(item->folder != NULL);
3718         g_return_if_fail(FOLDER_CLASS(item->folder) == &imap_class);
3719
3720         debug_print("Deleting all cached messages...\n");
3721
3722         dir = folder_item_get_path(item);
3723         if (is_dir_exist(dir))
3724                 remove_all_numbered_files(dir);
3725         g_free(dir);
3726
3727         debug_print("done.\n");
3728 }
3729
3730 gchar imap_get_path_separator_for_item(FolderItem *item)
3731 {
3732         Folder *folder = NULL;
3733         IMAPFolder *imap_folder = NULL;
3734         IMAPSession *session = NULL;
3735         gchar result = '/';
3736         gint ok = MAILIMAP_NO_ERROR;
3737         if (!item)
3738                 return '/';
3739         folder = item->folder;
3740
3741         if (!folder)
3742                 return '/';
3743
3744         imap_folder = IMAP_FOLDER(folder);
3745
3746         debug_print("getting session...");
3747         session = imap_session_get(FOLDER(folder));
3748         result = imap_get_path_separator(session, imap_folder, item->path, &ok);
3749         return result;
3750 }
3751
3752 static gchar imap_refresh_path_separator(IMAPSession *session, IMAPFolder *folder, const gchar *subfolder, gint *ok)
3753 {
3754         clist * lep_list;
3755         int r;
3756         gchar separator = '\0';
3757
3758         g_return_val_if_fail(session != NULL, '/');
3759         r = imap_threaded_list((Folder *)folder, "", subfolder, &lep_list);
3760
3761         if (r != MAILIMAP_NO_ERROR) {
3762                 imap_handle_error(SESSION(session), NULL, r);
3763                 log_warning(LOG_PROTOCOL, _("LIST failed\n"));
3764                 *ok = r;
3765                 return '\0';
3766         }
3767
3768         if (lep_list != NULL && clist_count(lep_list) > 0) {
3769                 clistiter * iter = clist_begin(lep_list);
3770                 struct mailimap_mailbox_list * mb;
3771                 mb = clist_content(iter);
3772
3773                 separator = mb->mb_delimiter;
3774                 debug_print("got separator: %c\n", folder->last_seen_separator);
3775         }
3776         *ok = MAILIMAP_NO_ERROR;
3777         mailimap_list_result_free(lep_list);
3778         return separator;
3779 }
3780
3781 static gchar imap_get_path_separator(IMAPSession *session, IMAPFolder *folder, const gchar *path, gint *ok)
3782 {
3783         gchar separator = '/';
3784         *ok = MAILIMAP_NO_ERROR;
3785         if (folder->last_seen_separator == 0) {
3786                 folder->last_seen_separator = imap_refresh_path_separator(session, folder, "", ok);
3787         }
3788
3789         if (folder->last_seen_separator == 0) {
3790                 folder->last_seen_separator = imap_refresh_path_separator(session, folder, "INBOX", ok);
3791         }
3792
3793         if (folder->last_seen_separator != 0) {
3794                 debug_print("using separator: %c\n", folder->last_seen_separator);
3795                 return folder->last_seen_separator;
3796         }
3797
3798         return separator;
3799 }
3800
3801 static gchar *imap_get_real_path(IMAPSession *session, IMAPFolder *folder, const gchar *path, gint *ok)
3802 {
3803         gchar *real_path = NULL;
3804         gchar separator;
3805
3806         g_return_val_if_fail(folder != NULL, NULL);
3807         g_return_val_if_fail(path != NULL, NULL);
3808
3809         *ok = MAILIMAP_NO_ERROR;
3810
3811         real_path = imap_utf8_to_modified_utf7(path, FALSE);
3812         separator = imap_get_path_separator(session, folder, path, ok);
3813         if (*ok == MAILIMAP_NO_ERROR)
3814                 imap_path_separator_subst(real_path, separator);
3815
3816         return real_path;
3817 }
3818
3819 static gint imap_set_message_flags(IMAPSession *session,
3820                                    IMAPFolderItem *item,
3821                                    MsgNumberList *numlist,
3822                                    IMAPFlags flags,
3823                                    GSList *tags,
3824                                    gboolean is_set)
3825 {
3826         gint ok = 0;
3827         GSList *seq_list;
3828         GSList * cur;
3829         gint total = 0;
3830         IMAPFolder *folder = NULL;
3831         GSList *sorted_list = NULL;
3832
3833         if (numlist == NULL || session == NULL)
3834                 return MAILIMAP_ERROR_BAD_STATE;
3835
3836         folder = IMAP_FOLDER(session->folder);
3837
3838         sorted_list = g_slist_copy(numlist);
3839         sorted_list = g_slist_sort(sorted_list, g_int_compare);
3840
3841         cur = g_slist_last(sorted_list);
3842
3843         if (cur)
3844                 total = GPOINTER_TO_INT(cur->data);
3845
3846         seq_list = imap_get_lep_set_from_numlist(IMAP_FOLDER(session->folder), sorted_list);
3847
3848         statusbar_print_all(_("Flagging messages..."));
3849
3850         for(cur = seq_list ; cur != NULL ; cur = g_slist_next(cur)) {
3851                 struct mailimap_set * imapset = (struct mailimap_set *)cur->data;
3852                 struct mailimap_set_item *set_item = NULL;
3853
3854                 if (imapset->set_list)
3855                         set_item = clist_content(clist_begin(imapset->set_list));
3856                 else
3857                         continue;
3858
3859                 if (set_item == NULL)
3860                         continue;
3861
3862                 statusbar_progress_all(set_item->set_first, total, 1);
3863
3864                 ok = imap_cmd_store(session, item, imapset,
3865                                     flags, tags, is_set);
3866                 statusbar_progress_all(set_item->set_last, total, 1);
3867                 if (ok != MAILIMAP_NO_ERROR && folder->max_set_size > 20) {
3868                         /* reduce max set size */
3869                         folder->max_set_size /= 2;
3870                 }
3871                 if (ok != MAILIMAP_NO_ERROR && is_fatal(ok)) {
3872                         break;
3873                 }
3874         }
3875
3876         g_slist_free(sorted_list);
3877
3878         statusbar_progress_all(0,0,0);
3879         statusbar_pop_all();
3880
3881         imap_lep_set_free(seq_list);
3882
3883         return ok;
3884 }
3885
3886 typedef struct _select_data {
3887         IMAPSession *session;
3888         gchar *real_path;
3889         gint *exists;
3890         gint *recent;
3891         gint *unseen;
3892         guint32 *uid_validity;
3893         gboolean done;
3894 } select_data;
3895
3896 static gint imap_select(IMAPSession *session, IMAPFolder *folder,
3897                         FolderItem *item,
3898                         gint *exists, gint *recent, gint *unseen,
3899                         guint32 *uid_validity, gint *can_create_flags,
3900                         gboolean block)
3901 {
3902         gchar *real_path;
3903         gint ok = MAILIMAP_NO_ERROR;
3904         gint exists_, recent_, unseen_;
3905         guint32 uid_validity_;
3906         gint can_create_flags_;
3907         const gchar *path = item ? item->path:NULL;
3908
3909         if (!item) {
3910                 return MAILIMAP_ERROR_BAD_STATE;
3911         }
3912
3913         if (!exists && !recent && !unseen && !uid_validity && !can_create_flags) {
3914                 if (session->mbox && strcmp(session->mbox, path) == 0)
3915                         return MAILIMAP_NO_ERROR;
3916         }
3917         if (!exists && !recent && !unseen && !uid_validity && can_create_flags) {
3918                 if (session->mbox && strcmp(session->mbox, path) == 0) {
3919                         if (IMAP_FOLDER_ITEM(item)->can_create_flags != ITEM_CAN_CREATE_FLAGS_UNKNOWN)
3920                                 return MAILIMAP_NO_ERROR;
3921                 }
3922         }
3923         if (!exists)
3924                 exists = &exists_;
3925         if (!recent)
3926                 recent = &recent_;
3927         if (!unseen)
3928                 unseen = &unseen_;
3929         if (!uid_validity)
3930                 uid_validity = &uid_validity_;
3931         if (!can_create_flags)
3932                 can_create_flags = &can_create_flags_;
3933
3934         g_free(session->mbox);
3935         session->mbox = NULL;
3936         session->exists = 0;
3937         session->recent = 0;
3938         session->expunge = 0;
3939
3940         real_path = imap_get_real_path(session, folder, path, &ok);
3941         if (is_fatal(ok)) {
3942                 g_free(real_path);
3943                 return ok;
3944         }
3945         g_slist_free(IMAP_FOLDER_ITEM(item)->ok_flags);
3946         IMAP_FOLDER_ITEM(item)->ok_flags = NULL;
3947         ok = imap_cmd_select(session, real_path,
3948                              exists, recent, unseen, uid_validity, can_create_flags,
3949                              &(IMAP_FOLDER_ITEM(item)->ok_flags), block);
3950         if (ok != MAILIMAP_NO_ERROR) {
3951                 log_warning(LOG_PROTOCOL, _("can't select folder: %s\n"), real_path);
3952         } else {
3953                 session->mbox = g_strdup(path);
3954                 session->folder_content_changed = FALSE;
3955                 session->exists = *exists;
3956                 session->recent = *recent;
3957                 session->expunge = 0;
3958                 session->unseen = *unseen;
3959                 session->uid_validity = *uid_validity;
3960                 debug_print("select: exists %d recent %d expunge %d uid_validity %d can_create_flags %d\n",
3961                         session->exists, session->recent, session->expunge,
3962                         session->uid_validity, *can_create_flags);
3963         }
3964         if (*can_create_flags) {
3965                 IMAP_FOLDER_ITEM(item)->can_create_flags = ITEM_CAN_CREATE_FLAGS;
3966         } else {
3967                 IMAP_FOLDER_ITEM(item)->can_create_flags = ITEM_CANNOT_CREATE_FLAGS;
3968         }
3969         g_free(real_path);
3970
3971         return ok;
3972 }
3973
3974 static gint imap_status(IMAPSession *session, IMAPFolder *folder,
3975                         const gchar *path, IMAPFolderItem *item,
3976                         gint *messages,
3977                         guint32 *uid_next, guint32 *uid_validity,
3978                         gint *unseen, gboolean block)
3979 {
3980         int r = MAILIMAP_NO_ERROR;
3981         clistiter * iter;
3982         struct mailimap_mailbox_data_status * data_status;
3983         int got_values;
3984         gchar *real_path;
3985         guint mask = 0;
3986
3987         real_path = imap_get_real_path(session, folder, path, &r);
3988         if (is_fatal(r)) {
3989                 g_free(real_path);
3990                 return r;
3991         }
3992         if (messages) {
3993                 mask |= 1 << 0;
3994                 *messages = 0;
3995         }
3996         if (uid_next) {
3997                 mask |= 1 << 2;
3998                 *uid_next = 0;
3999         }
4000         if (uid_validity) {
4001                 mask |= 1 << 3;
4002                 *uid_validity = 0;
4003         }
4004         if (unseen) {
4005                 mask |= 1 << 4;
4006                 *unseen = 0;
4007         }
4008
4009         if (session->mbox != NULL &&
4010             !strcmp(session->mbox, item->item.path)) {
4011                 r = imap_cmd_close(session);
4012                 if (r != MAILIMAP_NO_ERROR) {
4013                         debug_print("close err %d\n", r);
4014                         g_free(real_path);
4015                         return r;
4016                 }
4017         }
4018
4019         r = imap_threaded_status(FOLDER(folder), real_path,
4020                 &data_status, mask);
4021
4022         g_free(real_path);
4023         if (r != MAILIMAP_NO_ERROR) {
4024                 imap_handle_error(SESSION(session), NULL, r);
4025                 debug_print("status err %d\n", r);
4026                 return r;
4027         }
4028
4029         if (data_status == NULL || data_status->st_info_list == NULL) {
4030                 debug_print("data_status %p\n", data_status);
4031                 if (data_status) {
4032                         debug_print("data_status->st_info_list %p\n", data_status->st_info_list);
4033                         mailimap_mailbox_data_status_free(data_status);
4034                 }
4035                 return MAILIMAP_ERROR_BAD_STATE;
4036         }
4037
4038         got_values = 0;
4039         if (data_status->st_info_list) {
4040                 for(iter = clist_begin(data_status->st_info_list) ; iter != NULL ;
4041                     iter = clist_next(iter)) {
4042                         struct mailimap_status_info * info;
4043
4044                         info = clist_content(iter);
4045                         switch (info->st_att) {
4046                         case MAILIMAP_STATUS_ATT_MESSAGES:
4047                                 if (messages) {
4048                                         * messages = info->st_value;
4049                                         got_values |= 1 << 0;
4050                                 }
4051                                 break;
4052
4053                         case MAILIMAP_STATUS_ATT_UIDNEXT:
4054                                 if (uid_next) {
4055                                         * uid_next = info->st_value;
4056                                         got_values |= 1 << 2;
4057                                 }
4058                                 break;
4059
4060                         case MAILIMAP_STATUS_ATT_UIDVALIDITY:
4061                                 if (uid_validity) {
4062                                         * uid_validity = info->st_value;
4063                                         got_values |= 1 << 3;
4064                                 }
4065                                 break;
4066
4067                         case MAILIMAP_STATUS_ATT_UNSEEN:
4068                                 if (unseen) {
4069                                         * unseen = info->st_value;
4070                                         got_values |= 1 << 4;
4071                                 }
4072                                 break;
4073                         }
4074                 }
4075         }
4076         mailimap_mailbox_data_status_free(data_status);
4077
4078         if (got_values != mask) {
4079                 g_warning("status: incomplete values received (%d)", got_values);
4080         }
4081         return MAILIMAP_NO_ERROR;
4082 }
4083
4084 static void imap_free_capabilities(IMAPSession *session)
4085 {
4086         slist_free_strings_full(session->capability);
4087         session->capability = NULL;
4088 }
4089
4090 /* low-level IMAP4rev1 commands */
4091
4092 static gint imap_cmd_login(IMAPSession *session,
4093                            const gchar *user, const gchar *pass,
4094                            const gchar *type)
4095 {
4096         int r;
4097         gint ok;
4098
4099         if (!strcmp(type, "plaintext") && imap_has_capability(session, "LOGINDISABLED")) {
4100                 gint ok = MAILIMAP_ERROR_BAD_STATE;
4101                 if (imap_has_capability(session, "STARTTLS")) {
4102 #ifdef USE_GNUTLS
4103                         log_warning(LOG_PROTOCOL, _("Server requires TLS to log in.\n"));
4104                         ok = imap_cmd_starttls(session);
4105                         if (ok != MAILIMAP_NO_ERROR) {
4106                                 log_warning(LOG_PROTOCOL, _("Can't start TLS session.\n"));
4107                                 return ok;
4108                         } else {
4109                                 /* refresh capas */
4110                                 imap_free_capabilities(session);
4111                                 if ((r = imap_get_capabilities(session)) != MAILIMAP_NO_ERROR) {
4112                                         imap_handle_error(SESSION(session), NULL, r);
4113                                         log_warning(LOG_PROTOCOL, _("Can't refresh capabilities.\n"));
4114                                         return r;
4115                                 }
4116                         }
4117 #else
4118                         log_error(LOG_PROTOCOL, _("Connection to %s failed: "
4119                                         "server requires TLS, but Claws Mail "
4120                                         "has been compiled without TLS "
4121                                         "support.\n"),
4122                                         SESSION(session)->server);
4123                         return MAILIMAP_ERROR_LOGIN;
4124 #endif
4125                 } else {
4126                         log_error(LOG_PROTOCOL, _("Server logins are disabled.\n"));
4127                         return MAILIMAP_ERROR_LOGIN;
4128                 }
4129         }
4130
4131         log_print(LOG_PROTOCOL, "IMAP4> Logging %s to %s using %s\n",
4132                         user,
4133                         SESSION(session)->server,
4134                         type);
4135         r = imap_threaded_login(session->folder, user, pass, type);
4136         if (r != MAILIMAP_NO_ERROR) {
4137                 imap_handle_error(SESSION(session), NULL, r);
4138                 log_print(LOG_PROTOCOL, "IMAP4< Error logging in to %s\n",
4139                                 SESSION(session)->server);
4140                 ok = r;
4141         } else {
4142                 log_print(LOG_PROTOCOL, "IMAP4< Login to %s successful\n",
4143                                 SESSION(session)->server);
4144                 ok = MAILIMAP_NO_ERROR;
4145         }
4146         return ok;
4147 }
4148
4149 static gint imap_cmd_noop(IMAPSession *session)
4150 {
4151         int r;
4152         unsigned int exists, recent, expunge, unseen, uidnext, uidval;
4153
4154         r = imap_threaded_noop(session->folder, &exists, &recent, &expunge, &unseen, &uidnext, &uidval);
4155         if (r != MAILIMAP_NO_ERROR) {
4156                 imap_handle_error(SESSION(session), NULL, r);
4157                 debug_print("noop err %d\n", r);
4158                 return r;
4159         }
4160
4161         if ((exists && exists != session->exists)
4162          || (recent && recent != session->recent)
4163          || (expunge && expunge != session->expunge)
4164          || (unseen && unseen != session->unseen)) {
4165                 session->folder_content_changed = TRUE;
4166         }
4167         if (uidnext != 0 && uidnext != session->uid_next) {
4168                 session->uid_next = uidnext;
4169                 session->folder_content_changed = TRUE;
4170         }
4171         if (uidval != 0 && uidval != session->uid_validity) {
4172                 session->uid_validity = uidval;
4173                 session->folder_content_changed = TRUE;
4174         }
4175
4176         session->exists = exists;
4177         session->recent = recent;
4178         session->expunge = expunge;
4179         session->unseen = unseen;
4180
4181         session_set_access_time(SESSION(session));
4182
4183         return MAILIMAP_NO_ERROR;
4184 }
4185
4186 #ifdef USE_GNUTLS
4187 static gint imap_cmd_starttls(IMAPSession *session)
4188 {
4189         int r;
4190
4191         r = imap_threaded_starttls(session->folder,
4192                 SESSION(session)->server, SESSION(session)->port);
4193         if (r != MAILIMAP_NO_ERROR) {
4194                 imap_handle_error(SESSION(session), NULL, r);
4195                 debug_print("starttls err %d\n", r);
4196                 return r;
4197         }
4198         return MAILIMAP_NO_ERROR;
4199 }
4200 #endif
4201
4202 static gint imap_cmd_select(IMAPSession *session, const gchar *folder,
4203                             gint *exists, gint *recent, gint *unseen,
4204                             guint32 *uid_validity, gint *can_create_flags,
4205                             GSList **ok_flags, gboolean block)
4206 {
4207         int r;
4208
4209         r = imap_threaded_select(session->folder, folder,
4210                                  exists, recent, unseen, uid_validity, can_create_flags, ok_flags);
4211         if (r != MAILIMAP_NO_ERROR) {
4212                 imap_handle_error(SESSION(session), NULL, r);
4213                 debug_print("select err %d\n", r);
4214                 return r;
4215         }
4216         return MAILIMAP_NO_ERROR;
4217 }
4218
4219 static gint imap_cmd_close(IMAPSession *session)
4220 {
4221         int r;
4222
4223         r = imap_threaded_close(session->folder);
4224         if (r != MAILIMAP_NO_ERROR) {
4225                 imap_handle_error(SESSION(session), NULL, r);
4226                 debug_print("close err %d\n", r);
4227                 return r;
4228         }
4229         g_free(session->mbox);
4230         session->mbox = NULL;
4231         session->exists = 0;
4232         session->recent = 0;
4233         session->expunge = 0;
4234         return MAILIMAP_NO_ERROR;
4235 }
4236
4237 static gint imap_cmd_examine(IMAPSession *session, const gchar *folder,
4238                              gint *exists, gint *recent, gint *unseen,
4239                              guint32 *uid_validity, gboolean block)
4240 {
4241         int r;
4242
4243         r = imap_threaded_examine(session->folder, folder,
4244                                   exists, recent, unseen, uid_validity);
4245         if (r != MAILIMAP_NO_ERROR) {
4246                 imap_handle_error(SESSION(session), NULL, r);
4247                 debug_print("examine err %d\n", r);
4248
4249                 return r;
4250         }
4251         return MAILIMAP_NO_ERROR;
4252 }
4253
4254 static gint imap_cmd_create(IMAPSession *session, const gchar *folder)
4255 {
4256         int r;
4257
4258         r = imap_threaded_create(session->folder, folder);
4259         if (r != MAILIMAP_NO_ERROR) {
4260                 imap_handle_error(SESSION(session), NULL, r);
4261                 return r;
4262         }
4263
4264         return MAILIMAP_NO_ERROR;
4265 }
4266
4267 static gint imap_cmd_rename(IMAPSession *session, const gchar *old_folder,
4268                             const gchar *new_folder)
4269 {
4270         int r;
4271
4272         r = imap_threaded_rename(session->folder, old_folder,
4273                                  new_folder);
4274         if (r != MAILIMAP_NO_ERROR) {
4275                 imap_handle_error(SESSION(session), NULL, r);
4276                 return r;
4277         }
4278
4279         return MAILIMAP_NO_ERROR;
4280 }
4281
4282 static gint imap_cmd_delete(IMAPSession *session, const gchar *folder)
4283 {
4284         int r;
4285
4286
4287         r = imap_threaded_delete(session->folder, folder);
4288         if (r != MAILIMAP_NO_ERROR) {
4289                 imap_handle_error(SESSION(session), NULL, r);
4290                 return r;
4291         }
4292
4293         return MAILIMAP_NO_ERROR;
4294 }
4295
4296 typedef struct _fetch_data {
4297         IMAPSession *session;
4298         guint32 uid;
4299         const gchar *filename;
4300         gboolean headers;
4301         gboolean body;
4302         gboolean done;
4303 } fetch_data;
4304
4305 static void *imap_cmd_fetch_thread(void *data)
4306 {
4307         fetch_data *stuff = (fetch_data *)data;
4308         IMAPSession *session = stuff->session;
4309         guint32 uid = stuff->uid;
4310         const gchar *filename = stuff->filename;
4311         int r;
4312
4313         if (stuff->body) {
4314                 r = imap_threaded_fetch_content(session->folder,
4315                                                uid, 1, filename);
4316         }
4317         else {
4318                 r = imap_threaded_fetch_content(session->folder,
4319                                                 uid, 0, filename);
4320         }
4321         if (r != MAILIMAP_NO_ERROR) {
4322                 imap_handle_error(SESSION(session), NULL, r);
4323                 debug_print("fetch err %d\n", r);
4324                 return GINT_TO_POINTER(r);
4325         }
4326         return GINT_TO_POINTER(MAILIMAP_NO_ERROR);
4327 }
4328
4329 static gint imap_cmd_fetch(IMAPSession *session, guint32 uid,
4330                                 const gchar *filename, gboolean headers,
4331                                 gboolean body)
4332 {
4333         fetch_data *data = g_new0(fetch_data, 1);
4334         int result = 0;
4335         data->done = FALSE;
4336         data->session = session;
4337         data->uid = uid;
4338         data->filename = filename;
4339         data->headers = headers;
4340         data->body = body;
4341
4342         if (prefs_common.work_offline &&
4343             !inc_offline_should_override(FALSE,
4344                 _("Claws Mail needs network access in order "
4345                   "to access the IMAP server."))) {
4346                 g_free(data);
4347                 return -1;
4348         }
4349         statusbar_print_all(_("Fetching message..."));
4350         result = GPOINTER_TO_INT(imap_cmd_fetch_thread(data));
4351         statusbar_pop_all();
4352         g_free(data);
4353         return result;
4354 }
4355
4356
4357 static gint imap_cmd_append(IMAPSession *session,
4358                             IMAPFolderItem *item,
4359                             const gchar *destfolder,
4360                             const gchar *file, IMAPFlags flags,
4361                             guint32 *new_uid)
4362 {
4363         struct mailimap_flag_list * flag_list;
4364         int r;
4365
4366         cm_return_val_if_fail(file != NULL, MAILIMAP_ERROR_BAD_STATE);
4367
4368         flag_list = imap_flag_to_lep(item, flags, NULL);
4369         lock_session(session);
4370         r = imap_threaded_append(session->folder, destfolder,
4371                          file, flag_list, (int *)new_uid);
4372         mailimap_flag_list_free(flag_list);
4373
4374         if (r != MAILIMAP_NO_ERROR) {
4375                 imap_handle_error(SESSION(session), NULL, r);
4376                 debug_print("append err %d\n", r);
4377                 return r;
4378         }
4379
4380         unlock_session(session);
4381
4382         return MAILIMAP_NO_ERROR;
4383 }
4384
4385 static gint imap_cmd_copy(IMAPSession *session, struct mailimap_set * set,
4386                           const gchar *destfolder,
4387                           struct mailimap_set **source, struct mailimap_set **dest)
4388 {
4389         int r;
4390
4391         g_return_val_if_fail(session != NULL, MAILIMAP_ERROR_BAD_STATE);
4392         g_return_val_if_fail(set != NULL, MAILIMAP_ERROR_BAD_STATE);
4393         g_return_val_if_fail(destfolder != NULL, MAILIMAP_ERROR_BAD_STATE);
4394
4395         r = imap_threaded_copy(session->folder, set, destfolder, source, dest);
4396         if (r != MAILIMAP_NO_ERROR) {
4397                 imap_handle_error(SESSION(session), NULL, r);
4398                 return r;
4399         }
4400
4401         return MAILIMAP_NO_ERROR;
4402 }
4403
4404 static gint imap_cmd_store(IMAPSession *session,
4405                            IMAPFolderItem *item,
4406                            struct mailimap_set * set,
4407                            IMAPFlags flags, GSList *tags, int do_add)
4408 {
4409         int r;
4410         struct mailimap_flag_list * flag_list = NULL;
4411         struct mailimap_store_att_flags * store_att_flags;
4412
4413         flag_list = imap_flag_to_lep(item, flags, tags);
4414
4415         if (do_add)
4416                 store_att_flags =
4417                         mailimap_store_att_flags_new_add_flags_silent(flag_list);
4418         else
4419                 store_att_flags =
4420                         mailimap_store_att_flags_new_remove_flags_silent(flag_list);
4421
4422         r = imap_threaded_store(session->folder, set, store_att_flags);
4423         mailimap_store_att_flags_free(store_att_flags);
4424         if (r != MAILIMAP_NO_ERROR) {
4425                 imap_handle_error(SESSION(session), NULL, r);
4426                 return r;
4427         }
4428
4429         return MAILIMAP_NO_ERROR;
4430 }
4431
4432 static gint imap_cmd_expunge(IMAPSession *session, gboolean do_expunge)
4433 {
4434         int r;
4435
4436         if (!do_expunge)
4437                 return MAILIMAP_NO_ERROR;
4438
4439         if (prefs_common.work_offline &&
4440             !inc_offline_should_override(FALSE,
4441                 _("Claws Mail needs network access in order "
4442                   "to access the IMAP server."))) {
4443                 return -1;
4444         }
4445
4446         r = imap_threaded_expunge(session->folder);
4447         if (r != MAILIMAP_NO_ERROR) {
4448                 imap_handle_error(SESSION(session), NULL, r);
4449                 return r;
4450         }
4451
4452         return MAILIMAP_NO_ERROR;
4453 }
4454
4455 gint imap_expunge(Folder *folder, FolderItem *item)
4456 {
4457         IMAPSession *session = imap_session_get(folder);
4458         if (session == NULL)
4459                 return -1;
4460
4461         return imap_cmd_expunge(session, TRUE);
4462 }
4463
4464 static void imap_path_separator_subst(gchar *str, gchar separator)
4465 {
4466         gchar *p;
4467         gboolean in_escape = FALSE;
4468
4469         if (!separator || separator == '/') return;
4470
4471         for (p = str; *p != '\0'; p++) {
4472                 if (*p == '/' && !in_escape)
4473                         *p = separator;
4474                 else if (*p == '&' && *(p + 1) != '-' && !in_escape)
4475                         in_escape = TRUE;
4476                 else if (*p == '-' && in_escape)
4477                         in_escape = FALSE;
4478         }
4479 }
4480
4481 static gboolean imap_rename_folder_func(GNode *node, gpointer data)
4482 {
4483         FolderItem *item = node->data;
4484         gchar **paths = data;
4485         const gchar *oldpath = paths[0];
4486         const gchar *newpath = paths[1];
4487         gchar *real_oldpath, *real_newpath;
4488         gchar *base;
4489         gchar *new_itempath;
4490         gint oldpathlen;
4491         IMAPSession *session = imap_session_get(item->folder);
4492         gint ok = MAILIMAP_NO_ERROR;
4493         oldpathlen = strlen(oldpath);
4494         if (strncmp(oldpath, item->path, oldpathlen) != 0) {
4495                 g_warning("path doesn't match: %s, %s", oldpath, item->path);
4496                 return TRUE;
4497         }
4498
4499         base = item->path + oldpathlen;
4500         while (*base == '/') base++;
4501         if (*base == '\0')
4502                 new_itempath = g_strdup(newpath);
4503         else
4504                 new_itempath = g_strconcat(newpath, "/", base,
4505                                            NULL);
4506
4507         real_oldpath = imap_get_real_path(session, IMAP_FOLDER(item->folder), item->path, &ok);
4508         g_free(item->path);
4509         item->path = new_itempath;
4510
4511         real_newpath = imap_get_real_path(session, IMAP_FOLDER(item->folder), item->path, &ok);
4512
4513         imap_threaded_subscribe(item->folder, real_oldpath, FALSE);
4514         imap_threaded_subscribe(item->folder, real_newpath, TRUE);
4515
4516         g_free(real_oldpath);
4517         g_free(real_newpath);
4518         return FALSE;
4519 }
4520
4521 static gint get_list_of_uids(IMAPSession *session, Folder *folder, IMAPFolderItem *item, GSList **msgnum_list)
4522 {
4523         GSList *uidlist, *elem;
4524         int r = -1;
4525         clist * lep_uidlist;
4526         gint ok, nummsgs = 0;
4527
4528         if (session == NULL) {
4529                 return -1;
4530         }
4531
4532         ok = imap_select(session, IMAP_FOLDER(folder), FOLDER_ITEM(item),
4533                          NULL, NULL, NULL, NULL, NULL, TRUE);
4534         if (ok != MAILIMAP_NO_ERROR) {
4535                 return -1;
4536         }
4537
4538         g_slist_free(item->uid_list);
4539         item->uid_list = NULL;
4540
4541         uidlist = NULL;
4542
4543         if (folder->account && folder->account->low_bandwidth) {
4544                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SIMPLE,
4545                                 NULL, NULL, NULL, &lep_uidlist);
4546         }
4547
4548         if (r == MAILIMAP_NO_ERROR) {
4549                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
4550                 mailimap_search_result_free(lep_uidlist);
4551         } else {
4552                 carray * lep_uidtab;
4553                 if (r != -1) { /* inited */
4554                         imap_handle_error(SESSION(session), NULL, r);
4555                         if (is_fatal(r))
4556                                 return -1;
4557                 }
4558                 r = imap_threaded_fetch_uid(folder, 1,
4559                                     &lep_uidtab);
4560                 if (r == MAILIMAP_NO_ERROR) {
4561                         uidlist = imap_uid_list_from_lep_tab(lep_uidtab);
4562                         imap_fetch_uid_list_free(lep_uidtab);
4563                 }
4564         }
4565
4566         if (r != MAILIMAP_NO_ERROR) {
4567                 imap_handle_error(SESSION(session), NULL, r);
4568                 return -1;
4569         }
4570
4571         for (elem = uidlist; elem != NULL; elem = g_slist_next(elem)) {
4572                 guint msgnum;
4573
4574                 msgnum = GPOINTER_TO_INT(elem->data);
4575
4576                 *msgnum_list = g_slist_prepend(*msgnum_list, GINT_TO_POINTER(msgnum));
4577                 item->uid_list = g_slist_prepend(item->uid_list, GINT_TO_POINTER(msgnum));
4578                 nummsgs++;
4579         }
4580         g_slist_free(uidlist);
4581
4582         return nummsgs;
4583
4584 }
4585
4586 gint imap_get_num_list(Folder *folder, FolderItem *_item, GSList **msgnum_list, gboolean *old_uids_valid)
4587 {
4588         IMAPFolderItem *item = (IMAPFolderItem *)_item;
4589         IMAPSession *session;
4590         gint nummsgs;
4591         GSList *uidlist = NULL;
4592         gchar *dir;
4593         gint known_list_len = 0;
4594         gchar *path;
4595
4596         debug_print("get_num_list\n");
4597
4598         g_return_val_if_fail(folder != NULL, -1);
4599         g_return_val_if_fail(item != NULL, -1);
4600         g_return_val_if_fail(item->item.path != NULL, -1);
4601         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
4602         g_return_val_if_fail(folder->account != NULL, -1);
4603
4604         known_list_len = g_slist_length(item->uid_list);
4605         if (!item->should_update) {
4606                 debug_print("get_num_list: nothing to update\n");
4607                 *old_uids_valid = TRUE;
4608                 if (known_list_len == item->item.total_msgs
4609                  && known_list_len > 0) {
4610                         *msgnum_list = g_slist_copy(item->uid_list);
4611                         return known_list_len;
4612                 } else {
4613                         debug_print("don't know the list length...\n");
4614                 }
4615         }
4616
4617         if (prefs_common.work_offline &&
4618             !inc_offline_should_override(FALSE,
4619                 _("Claws Mail needs network access in order "
4620                   "to access the IMAP server."))) {
4621                 return -1;
4622         }
4623
4624         path = folder_item_get_path(_item);
4625         if (!is_dir_exist(path)) {
4626                 if(is_file_exist(path))
4627                         claws_unlink(path);
4628                 make_dir_hier(path);
4629         }
4630         g_free(path);
4631
4632         debug_print("getting session...\n");
4633         session = imap_session_get(folder);
4634         g_return_val_if_fail(session != NULL, -1);
4635
4636         lock_session(session);
4637         if (FOLDER_ITEM(item)->path)
4638                 statusbar_print_all(_("Scanning folder %s%c%s..."),
4639                                       FOLDER_ITEM(item)->folder->name,
4640                                       '/',
4641                                       FOLDER_ITEM(item)->path);
4642         else
4643                 statusbar_print_all(_("Scanning folder %s..."),
4644                                       FOLDER_ITEM(item)->folder->name);
4645
4646         if (item->should_trash_cache) {
4647                 *old_uids_valid = FALSE;
4648                 debug_print("get_num_list: trashing num list\n");
4649                 debug_print("Freeing imap uid cache\n");
4650                 item->lastuid = 0;
4651                 g_slist_free(item->uid_list);
4652                 item->uid_list = NULL;
4653
4654                 imap_delete_all_cached_messages((FolderItem *)item);
4655         } else {
4656                 debug_print("get_num_list: updating num list\n");
4657                 *old_uids_valid = TRUE;
4658         }
4659
4660         nummsgs = get_list_of_uids(session, folder, item, &uidlist);
4661
4662         unlock_session(session);
4663
4664         /* session could be broken now, in case of fatal error */
4665
4666         debug_print("get_num_list: got %d msgs\n", nummsgs);
4667
4668         if (nummsgs < 0) {
4669                 statusbar_pop_all();
4670                 return -1;
4671         }
4672
4673         *msgnum_list = uidlist;
4674
4675         dir = folder_item_get_path((FolderItem *)item);
4676         debug_print("removing old messages from %s\n", dir);
4677         remove_numbered_files_not_in_list(dir, *msgnum_list);
4678         g_free(dir);
4679
4680         debug_print("get_num_list - ok - %i\n", nummsgs);
4681         statusbar_pop_all();
4682         item->should_trash_cache = FALSE;
4683         item->should_update = FALSE;
4684         return nummsgs;
4685 }
4686
4687 static MsgInfo *imap_parse_msg(const gchar *file, FolderItem *item)
4688 {
4689         MsgInfo *msginfo;
4690         MsgFlags flags;
4691
4692         flags.perm_flags = MSG_NEW|MSG_UNREAD;
4693         flags.tmp_flags = 0;
4694
4695         g_return_val_if_fail(item != NULL, NULL);
4696         g_return_val_if_fail(file != NULL, NULL);
4697
4698         if (folder_has_parent_of_type(item, F_QUEUE)) {
4699                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
4700         } else if (folder_has_parent_of_type(item, F_DRAFT)) {
4701                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
4702         }
4703
4704         msginfo = procheader_parse_file(file, flags, FALSE, FALSE);
4705         if (!msginfo) return NULL;
4706
4707         msginfo->plaintext_file = g_strdup(file);
4708         msginfo->folder = item;
4709
4710         return msginfo;
4711 }
4712
4713 GSList *imap_get_msginfos(Folder *folder, FolderItem *item,
4714                           GSList *msgnum_list)
4715 {
4716         IMAPSession *session;
4717         MsgInfoList *ret = NULL;
4718         gint ok;
4719
4720         debug_print("get_msginfos\n");
4721
4722         g_return_val_if_fail(folder != NULL, NULL);
4723         g_return_val_if_fail(item != NULL, NULL);
4724         g_return_val_if_fail(msgnum_list != NULL, NULL);
4725
4726         debug_print("getting session...\n");
4727         session = imap_session_get(folder);
4728         g_return_val_if_fail(session != NULL, NULL);
4729
4730         lock_session(session); /* unlocked later in the function */
4731
4732         debug_print("IMAP getting msginfos\n");
4733         ok = imap_select(session, IMAP_FOLDER(folder), item,
4734                          NULL, NULL, NULL, NULL, NULL, FALSE);
4735         if (ok != MAILIMAP_NO_ERROR) {
4736                 return NULL;
4737         }
4738         if (!(folder_has_parent_of_type(item, F_DRAFT) ||
4739               folder_has_parent_of_type(item, F_QUEUE))) {
4740                 ret = g_slist_concat(ret,
4741                         imap_get_uncached_messages(session, item,
4742                                                    msgnum_list, &ok));
4743                 if (ok != MAILIMAP_NO_ERROR)
4744                         return NULL;
4745                 unlock_session(session);
4746         } else {
4747                 MsgNumberList *sorted_list, *elem, *llast = NULL;
4748                 gint startnum, lastnum;
4749
4750                 unlock_session(session);
4751
4752                 sorted_list = g_slist_sort(g_slist_copy(msgnum_list), g_int_compare);
4753
4754                 startnum = lastnum = GPOINTER_TO_INT(sorted_list->data);
4755
4756                 llast = g_slist_last(ret);
4757                 for (elem = sorted_list;; elem = g_slist_next(elem)) {
4758                         guint num = 0;
4759
4760                         if (elem)
4761                                 num = GPOINTER_TO_INT(elem->data);
4762
4763                         if (num > lastnum + 1 || elem == NULL) {
4764                                 int i;
4765                                 for (i = startnum; i <= lastnum; ++i) {
4766                                         gchar *file;
4767                                         file = imap_fetch_msg(folder, item, i);
4768                                         if (file != NULL) {
4769                                                 MsgInfo *msginfo = imap_parse_msg(file, item);
4770                                                 if (msginfo != NULL) {
4771                                                         msginfo->msgnum = i;
4772                                                         if (llast == NULL)
4773                                                                 llast = ret = g_slist_append(ret, msginfo);
4774                                                         else {
4775                                                                 llast = g_slist_append(llast, msginfo);
4776                                                                 llast = llast->next;
4777                                                         }
4778                                                 }
4779                                                 g_free(file);
4780                                         }
4781                                 }
4782
4783                                 if (elem == NULL)
4784                                         break;
4785
4786                                 startnum = num;
4787                         }
4788                         lastnum = num;
4789                 }
4790
4791                 g_slist_free(sorted_list);
4792         }
4793         return ret;
4794 }
4795
4796 MsgInfo *imap_get_msginfo(Folder *folder, FolderItem *item, gint uid)
4797 {
4798         MsgInfo *msginfo = NULL;
4799         MsgInfoList *msginfolist;
4800         MsgNumberList numlist;
4801
4802         numlist.next = NULL;
4803         numlist.data = GINT_TO_POINTER(uid);
4804
4805         msginfolist = imap_get_msginfos(folder, item, &numlist);
4806         if (msginfolist != NULL) {
4807                 msginfo = msginfolist->data;
4808                 g_slist_free(msginfolist);
4809         }
4810
4811         return msginfo;
4812 }
4813
4814 gboolean imap_scan_required(Folder *folder, FolderItem *_item)
4815 {
4816         IMAPSession *session;
4817         IMAPFolderItem *item = (IMAPFolderItem *)_item;
4818         gint ok, exists = 0, unseen = 0;
4819         guint32 uid_next = 0, uid_val = 0;
4820         gboolean selected_folder;
4821
4822         g_return_val_if_fail(folder != NULL, FALSE);
4823         g_return_val_if_fail(item != NULL, FALSE);
4824         g_return_val_if_fail(item->item.folder != NULL, FALSE);
4825         g_return_val_if_fail(FOLDER_CLASS(item->item.folder) == &imap_class, FALSE);
4826
4827         if (item->item.path == NULL)
4828                 return FALSE;
4829
4830         if (item->should_update) {
4831                 debug_print("scan already required\n");
4832                 return TRUE;
4833         }
4834         debug_print("getting session...\n");
4835         session = imap_session_get(folder);
4836
4837         g_return_val_if_fail(session != NULL, FALSE);
4838         lock_session(session); /* unlocked later in the function */
4839
4840         selected_folder = (session->mbox != NULL) &&
4841                           (!strcmp(session->mbox, item->item.path));
4842         if (selected_folder) {
4843                 if (!session->folder_content_changed) {
4844                         ok = imap_cmd_noop(session);
4845                         if (ok != MAILIMAP_NO_ERROR) {
4846                                 debug_print("disconnected!\n");
4847                                 if (!is_fatal(ok))
4848                                         session = imap_reconnect_if_possible(folder, session);
4849                                 else
4850                                         session = imap_session_get(folder);
4851                                 if (session == NULL)
4852                                         return FALSE;
4853                         }
4854
4855                         if (session->folder_content_changed) {
4856                                 debug_print("CHANGED (self-noop)! scan_required\n");
4857                                 item->should_update = TRUE;
4858                                 if (session->uid_validity && session->uid_validity != item->item.mtime) {
4859                                         item->item.mtime = session->uid_validity;
4860                                         item->should_trash_cache = TRUE;
4861                                 }
4862                                 unlock_session(session);
4863                                 return TRUE;
4864                         }
4865                 } else {
4866                         debug_print("CHANGED (previous noop)! scan_required\n");
4867                         item->should_update = TRUE;
4868                         if (session->uid_validity && session->uid_validity != item->item.mtime) {
4869                                 item->item.mtime = session->uid_validity;
4870                                 item->should_trash_cache = TRUE;
4871                         }
4872                         unlock_session(session);
4873                         return TRUE;
4874                 }
4875         } else {
4876                 ok = imap_status(session, IMAP_FOLDER(folder), item->item.path, IMAP_FOLDER_ITEM(item),
4877                                  &exists, &uid_next, &uid_val, &unseen, FALSE);
4878                 if (ok != MAILIMAP_NO_ERROR) {
4879                         return FALSE;
4880                 }
4881
4882                 debug_print("exists %d, item->item.total_msgs %d\n"
4883                             "\tunseen %d, item->item.unread_msgs %d\n"
4884                             "\tuid_next %d, item->uid_next %d\n"
4885                             "\tuid_val %d, item->item.mtime %ld\n",
4886                             exists, item->item.total_msgs, unseen, item->item.unread_msgs,
4887                             uid_next, item->uid_next, uid_val, (long)(item->item.mtime));
4888                 if (exists != item->item.total_msgs
4889                     || unseen != item->item.unread_msgs
4890                     || uid_next != item->uid_next
4891                     || uid_val != item->item.mtime) {
4892                         debug_print("CHANGED (status)! scan_required\n");
4893                         item->last_change = time(NULL);
4894                         item->should_update = TRUE;
4895                         item->uid_next = uid_next;
4896                         if (uid_val != item->item.mtime) {
4897                                 item->item.mtime = uid_val;
4898                                 item->should_trash_cache = TRUE;
4899                         }
4900                         unlock_session(session);
4901                         return TRUE;
4902                 }
4903         }
4904         unlock_session(session);
4905
4906         item->should_update = FALSE;
4907         return FALSE;
4908 }
4909
4910 void imap_change_flags(Folder *folder, FolderItem *item, MsgInfo *msginfo, MsgPermFlags newflags)
4911 {
4912         IMAPSession *session;
4913         IMAPFlags flags_set = 0, flags_unset = 0;
4914         gint ok = MAILIMAP_NO_ERROR;
4915         MsgNumberList numlist;
4916         hashtable_data *ht_data = NULL;
4917
4918         g_return_if_fail(folder != NULL);
4919         g_return_if_fail(folder->klass == &imap_class);
4920         g_return_if_fail(item != NULL);
4921         g_return_if_fail(item->folder == folder);
4922         g_return_if_fail(msginfo != NULL);
4923         g_return_if_fail(msginfo->folder == item);
4924
4925         if (!MSG_IS_MARKED(msginfo->flags) &&  (newflags & MSG_MARKED))
4926                 flags_set |= IMAP_FLAG_FLAGGED;
4927         if ( MSG_IS_MARKED(msginfo->flags) && !(newflags & MSG_MARKED))
4928                 flags_unset |= IMAP_FLAG_FLAGGED;
4929
4930         if (!MSG_IS_UNREAD(msginfo->flags) &&  (newflags & MSG_UNREAD))
4931                 flags_unset |= IMAP_FLAG_SEEN;
4932         if ( MSG_IS_UNREAD(msginfo->flags) && !(newflags & MSG_UNREAD))
4933                 flags_set |= IMAP_FLAG_SEEN;
4934
4935         if (!MSG_IS_REPLIED(msginfo->flags) &&  (newflags & MSG_REPLIED))
4936                 flags_set |= IMAP_FLAG_ANSWERED;
4937         if ( MSG_IS_REPLIED(msginfo->flags) && !(newflags & MSG_REPLIED))
4938                 flags_unset |= IMAP_FLAG_ANSWERED;
4939
4940         if (!MSG_IS_FORWARDED(msginfo->flags) &&  (newflags & MSG_FORWARDED))
4941                 flags_set |= IMAP_FLAG_FORWARDED;
4942         if ( MSG_IS_FORWARDED(msginfo->flags) && !(newflags & MSG_FORWARDED))
4943                 flags_unset |= IMAP_FLAG_FORWARDED;
4944
4945         if (!MSG_IS_SPAM(msginfo->flags) &&  (newflags & MSG_SPAM)) {
4946                 flags_set |= IMAP_FLAG_SPAM;
4947                 flags_unset |= IMAP_FLAG_HAM;
4948         }
4949         if ( MSG_IS_SPAM(msginfo->flags) && !(newflags & MSG_SPAM)) {
4950                 flags_set |= IMAP_FLAG_HAM;
4951                 flags_unset |= IMAP_FLAG_SPAM;
4952         }
4953         if (!MSG_IS_DELETED(msginfo->flags) &&  (newflags & MSG_DELETED))
4954                 flags_set |= IMAP_FLAG_DELETED;
4955         if ( MSG_IS_DELETED(msginfo->flags) && !(newflags & MSG_DELETED))
4956                 flags_unset |= IMAP_FLAG_DELETED;
4957
4958         if (!flags_set && !flags_unset) {
4959                 /* the changed flags were not translatable to IMAP-speak.
4960                  * like MSG_POSTFILTERED, so just apply. */
4961                 msginfo->flags.perm_flags = newflags;
4962                 return;
4963         }
4964
4965         debug_print("getting session...\n");
4966         session = imap_session_get(folder);
4967         if (!session) {
4968                 return;
4969         }
4970
4971         if ((ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
4972             NULL, NULL, NULL, NULL, NULL, FALSE)) != MAILIMAP_NO_ERROR) {
4973                 return;
4974         }
4975         numlist.next = NULL;
4976         numlist.data = GINT_TO_POINTER(msginfo->msgnum);
4977
4978         if (IMAP_FOLDER_ITEM(item)->batching) {
4979                 /* instead of performing an UID STORE command for each message change,
4980                  * as a lot of them can change "together", we just fill in hashtables
4981                  * and defer the treatment so that we're able to send only one
4982                  * command.
4983                  */
4984                 debug_print("IMAP batch mode on, deferring flags change\n");
4985                 if (flags_set) {
4986                         ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->flags_set_table,
4987                                 GINT_TO_POINTER(flags_set));
4988                         if (ht_data == NULL) {
4989                                 ht_data = g_new0(hashtable_data, 1);
4990                                 ht_data->item = IMAP_FOLDER_ITEM(item);
4991                                 g_hash_table_insert(IMAP_FOLDER_ITEM(item)->flags_set_table,
4992                                         GINT_TO_POINTER(flags_set), ht_data);
4993                         }
4994                         ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
4995                 }
4996                 if (flags_unset) {
4997                         ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->flags_unset_table,
4998                                 GINT_TO_POINTER(flags_unset));
4999                         if (ht_data == NULL) {
5000                                 ht_data = g_new0(hashtable_data, 1);
5001                                 ht_data->item = IMAP_FOLDER_ITEM(item);
5002                                 g_hash_table_insert(IMAP_FOLDER_ITEM(item)->flags_unset_table,
5003                                         GINT_TO_POINTER(flags_unset), ht_data);
5004                         }
5005                         ht_data->msglist = g_slist_prepend(ht_data->msglist,
5006                                         GINT_TO_POINTER(msginfo->msgnum));
5007                 }
5008         } else {
5009                 debug_print("IMAP changing flags\n");
5010                 if (flags_set) {
5011                         ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item), &numlist, flags_set, NULL, TRUE);
5012                         if (ok != MAILIMAP_NO_ERROR) {
5013                                 return;
5014                         }
5015                 }
5016
5017                 if (flags_unset) {
5018                         ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item), &numlist, flags_unset, NULL, FALSE);
5019                         if (ok != MAILIMAP_NO_ERROR) {
5020                                 return;
5021                         }
5022                 }
5023         }
5024         msginfo->flags.perm_flags = newflags;
5025         return;
5026 }
5027
5028 static gint imap_remove_msg(Folder *folder, FolderItem *item, gint uid)
5029 {
5030         gint ok;
5031         IMAPSession *session;
5032         gchar *dir;
5033         MsgNumberList numlist;
5034
5035         g_return_val_if_fail(folder != NULL, -1);
5036         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
5037         g_return_val_if_fail(item != NULL, -1);
5038
5039         debug_print("getting session...\n");
5040         session = imap_session_get(folder);
5041         if (!session) return -1;
5042
5043         ok = imap_select(session, IMAP_FOLDER(folder), item,
5044                          NULL, NULL, NULL, NULL, NULL, FALSE);
5045         if (ok != MAILIMAP_NO_ERROR) {
5046                 return ok;
5047         }
5048         numlist.next = NULL;
5049         numlist.data = GINT_TO_POINTER(uid);
5050
5051         ok = imap_set_message_flags
5052                 (session, IMAP_FOLDER_ITEM(item), &numlist, IMAP_FLAG_DELETED, NULL, TRUE);
5053         if (ok != MAILIMAP_NO_ERROR) {
5054                 log_warning(LOG_PROTOCOL, _("can't set deleted flags: %d\n"), uid);
5055                 return ok;
5056         }
5057
5058         ok = imap_cmd_expunge(session, folder->account->imap_use_trash);
5059
5060         if (ok != MAILIMAP_NO_ERROR) {
5061                 log_warning(LOG_PROTOCOL, _("can't expunge\n"));
5062                 return ok;
5063         }
5064
5065         IMAP_FOLDER_ITEM(item)->uid_list = g_slist_remove(
5066             IMAP_FOLDER_ITEM(item)->uid_list, numlist.data);
5067         dir = folder_item_get_path(item);
5068         if (is_dir_exist(dir))
5069                 remove_numbered_files(dir, uid, uid);
5070         g_free(dir);
5071         return MAILIMAP_NO_ERROR;
5072 }
5073
5074 static gint compare_msginfo(gconstpointer a, gconstpointer b)
5075 {
5076         return ((MsgInfo *)a)->msgnum - ((MsgInfo *)b)->msgnum;
5077 }
5078
5079 static guint gslist_find_next_num(MsgNumberList **list, guint num)
5080 {
5081         GSList *elem;
5082
5083         g_return_val_if_fail(list != NULL, -1);
5084
5085         for (elem = *list; elem != NULL; elem = g_slist_next(elem))
5086                 if (GPOINTER_TO_INT(elem->data) >= num)
5087                         break;
5088         *list = elem;
5089         return elem != NULL ? GPOINTER_TO_INT(elem->data) : (gint)-1;
5090 }
5091
5092 static gboolean flag_ok(IMAPFolderItem *item, guint flag)
5093 {
5094         if (item->ok_flags && g_slist_find(item->ok_flags, GUINT_TO_POINTER(flag))) {
5095                 debug_print("flag %d is OK\n", flag);
5096                 return TRUE;
5097         }
5098         if (item->can_create_flags == ITEM_CAN_CREATE_FLAGS) {
5099                 debug_print("creating flags is OK\n");
5100                 return TRUE;
5101         }
5102         return FALSE;
5103 }
5104
5105 /*
5106  * NEW and DELETED flags are not syncronized
5107  * - The NEW/RECENT flags in IMAP folders can not really be directly
5108  *   modified by Sylpheed
5109  * - The DELETE/DELETED flag in IMAP and Sylpheed don't have the same
5110  *   meaning, in IMAP it always removes the messages from the FolderItem
5111  *   in Sylpheed it can mean to move the message to trash
5112  */
5113
5114 typedef struct _get_flags_data {
5115         Folder *folder;
5116         FolderItem *item;
5117         MsgInfoList *msginfo_list;
5118         GHashTable *msgflags;
5119         gboolean full_search;
5120         gboolean done;
5121 } get_flags_data;
5122
5123 static /*gint*/ void *imap_get_flags_thread(void *data)
5124 {
5125         get_flags_data *stuff = (get_flags_data *)data;
5126         Folder *folder = stuff->folder;
5127         FolderItem *fitem = (FolderItem *) stuff->item;
5128         MsgInfoList *msginfo_list = stuff->msginfo_list;
5129         GHashTable *msgflags = stuff->msgflags;
5130         GSList *elem;
5131         carray * lep_uidtab;
5132         IMAPSession *session;
5133         gint ok;
5134         int r = MAILIMAP_NO_ERROR;
5135         GHashTable *flags_hash = NULL;
5136         GHashTable *tags_hash = NULL;
5137         gboolean full_search = stuff->full_search;
5138         GSList *sorted_list = NULL;
5139         GSList *unseen = NULL, *answered = NULL, *flagged = NULL, *deleted = NULL, *forwarded = NULL, *spam = NULL;
5140         GSList *seq_list, *cur;
5141         gboolean reverse_seen = FALSE;
5142         gboolean selected_folder;
5143         gint exists_cnt, unseen_cnt;
5144         gboolean got_alien_tags = FALSE;
5145
5146         session = imap_session_get(folder);
5147
5148         if (session == NULL) {
5149                 stuff->done = TRUE;
5150                 return GINT_TO_POINTER(-1);
5151         }
5152         selected_folder = (session->mbox != NULL) &&
5153                           (!strcmp(session->mbox, fitem->path));
5154
5155         lock_session(session);
5156         if (!selected_folder) {
5157                 ok = imap_select(session, IMAP_FOLDER(folder), fitem,
5158                         &exists_cnt, NULL, &unseen_cnt, NULL, NULL, TRUE);
5159                 if (ok != MAILIMAP_NO_ERROR) {
5160                         stuff->done = TRUE;
5161                         return GINT_TO_POINTER(-1);
5162                 }
5163
5164                 if (unseen_cnt > exists_cnt / 2)
5165                         reverse_seen = TRUE;
5166         }
5167         else {
5168                 if (fitem->unread_msgs > fitem->total_msgs / 2)
5169                         reverse_seen = TRUE;
5170         }
5171
5172         sorted_list = g_slist_sort(g_slist_copy(msginfo_list), compare_msginfo);
5173         if (!full_search) {
5174                 seq_list = imap_get_lep_set_from_msglist(IMAP_FOLDER(folder), msginfo_list);
5175         } else {
5176                 struct mailimap_set * set;
5177                 set = mailimap_set_new_interval(1, 0);
5178                 seq_list = g_slist_append(NULL, set);
5179         }
5180
5181         if (folder->account && folder->account->low_bandwidth) {
5182                 for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
5183                         struct mailimap_set * imapset;
5184                         clist * lep_uidlist;
5185                         int r;
5186
5187                         imapset = cur->data;
5188                         if (reverse_seen) {
5189                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SEEN, NULL,
5190                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5191                         }
5192                         else {
5193                                 r = imap_threaded_search(folder,
5194                                                          IMAP_SEARCH_TYPE_UNSEEN, NULL,
5195                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5196                         }
5197                         if (r == MAILIMAP_NO_ERROR) {
5198                                 GSList * uidlist;
5199
5200                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5201                                 mailimap_search_result_free(lep_uidlist);
5202
5203                                 unseen = g_slist_concat(unseen, uidlist);
5204                         } else {
5205                                 imap_handle_error(SESSION(session), NULL, r);
5206                                 goto bail;
5207                         }
5208
5209                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_FLAGGED, NULL,
5210                                                  NULL, full_search ? NULL:imapset, &lep_uidlist);
5211                         if (r == MAILIMAP_NO_ERROR) {
5212                                 GSList * uidlist;
5213
5214                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5215                                 mailimap_search_result_free(lep_uidlist);
5216
5217                                 flagged = g_slist_concat(flagged, uidlist);
5218                         } else {
5219                                 imap_handle_error(SESSION(session), NULL, r);
5220                                 goto bail;
5221                         }
5222
5223                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
5224                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_ANSWERED, NULL,
5225                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5226                                 if (r == MAILIMAP_NO_ERROR) {
5227                                         GSList * uidlist;
5228
5229                                         uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5230                                         mailimap_search_result_free(lep_uidlist);
5231
5232                                         answered = g_slist_concat(answered, uidlist);
5233                                 } else {
5234                                         imap_handle_error(SESSION(session), NULL, r);
5235                                         goto bail;
5236                                 }
5237
5238                                 if (flag_ok(IMAP_FOLDER_ITEM(fitem), IMAP_FLAG_FORWARDED)) {
5239                                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_FORWARDED, NULL,
5240                                                                  NULL, full_search ? NULL:imapset, &lep_uidlist);
5241                                         if (r == MAILIMAP_NO_ERROR) {
5242                                                 GSList * uidlist;
5243
5244                                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5245                                                 mailimap_search_result_free(lep_uidlist);
5246
5247                                                 forwarded = g_slist_concat(forwarded, uidlist);
5248                                         } else {
5249                                                 imap_handle_error(SESSION(session), NULL, r);
5250                                                 goto bail;
5251                                         }
5252                                 }
5253
5254                                 if (flag_ok(IMAP_FOLDER_ITEM(fitem), IMAP_FLAG_SPAM)) {
5255                                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SPAM, NULL,
5256                                                                  NULL, full_search ? NULL:imapset, &lep_uidlist);
5257                                         if (r == MAILIMAP_NO_ERROR) {
5258                                                 GSList * uidlist;
5259
5260                                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5261                                                 mailimap_search_result_free(lep_uidlist);
5262
5263                                                 spam = g_slist_concat(spam, uidlist);
5264                                         } else {
5265                                                 imap_handle_error(SESSION(session), NULL, r);
5266                                                 goto bail;
5267                                         }
5268                                 }
5269
5270                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_DELETED, NULL,
5271                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5272                                 if (r == MAILIMAP_NO_ERROR) {
5273                                         GSList * uidlist;
5274
5275                                         uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5276                                         mailimap_search_result_free(lep_uidlist);
5277
5278                                         deleted = g_slist_concat(deleted, uidlist);
5279                                 } else {
5280                                         imap_handle_error(SESSION(session), NULL, r);
5281                                         goto bail;
5282                                 }
5283                         }
5284                 }
5285
5286         } else {
5287                 r = imap_threaded_fetch_uid_flags(folder, 1, &lep_uidtab);
5288                 if (r == MAILIMAP_NO_ERROR) {
5289                         flags_hash = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, NULL);
5290                         tags_hash = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, NULL);
5291                         imap_flags_hash_from_lep_uid_flags_tab(lep_uidtab, flags_hash, tags_hash);
5292                         imap_fetch_uid_flags_list_free(lep_uidtab);
5293                 } else {
5294                         imap_handle_error(SESSION(session), NULL, r);
5295                         goto bail;
5296                 }
5297         }
5298
5299 bail:
5300         if (r == MAILIMAP_NO_ERROR)
5301                 unlock_session(session);
5302
5303         for (elem = sorted_list; elem != NULL; elem = g_slist_next(elem)) {
5304                 MsgInfo *msginfo;
5305                 MsgPermFlags flags, oldflags;
5306                 gboolean wasnew;
5307
5308                 msginfo = (MsgInfo *) elem->data;
5309                 flags = msginfo->flags.perm_flags;
5310                 wasnew = (flags & MSG_NEW);
5311                 oldflags = flags & ~(MSG_NEW|MSG_UNREAD|MSG_REPLIED|MSG_FORWARDED|MSG_MARKED|MSG_DELETED|MSG_SPAM);
5312
5313                 if (folder->account && folder->account->low_bandwidth) {
5314                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
5315                                 flags &= ~((reverse_seen ? 0 : MSG_UNREAD | MSG_NEW) | MSG_REPLIED | MSG_FORWARDED | MSG_MARKED | MSG_SPAM);
5316                         } else {
5317                                 flags &= ~((reverse_seen ? 0 : MSG_UNREAD | MSG_NEW | MSG_MARKED));
5318                         }
5319                         if (reverse_seen)
5320                                 flags |= MSG_UNREAD | (wasnew ? MSG_NEW : 0);
5321                         if (gslist_find_next_num(&unseen, msginfo->msgnum) == msginfo->msgnum) {
5322                                 if (!reverse_seen) {
5323                                         flags |= MSG_UNREAD | (wasnew ? MSG_NEW : 0);
5324                                 } else {
5325                                         flags &= ~(MSG_UNREAD | MSG_NEW);
5326                                 }
5327                         }
5328
5329                         if (gslist_find_next_num(&flagged, msginfo->msgnum) == msginfo->msgnum)
5330                                 flags |= MSG_MARKED;
5331                         else
5332                                 flags &= ~MSG_MARKED;
5333
5334                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
5335                                 if (gslist_find_next_num(&answered, msginfo->msgnum) == msginfo->msgnum)
5336                                         flags |= MSG_REPLIED;
5337                                 else
5338                                         flags &= ~MSG_REPLIED;
5339                                 if (gslist_find_next_num(&forwarded, msginfo->msgnum) == msginfo->msgnum)
5340                                         flags |= MSG_FORWARDED;
5341                                 else
5342                                         flags &= ~MSG_FORWARDED;
5343                                 if (gslist_find_next_num(&spam, msginfo->msgnum) == msginfo->msgnum)
5344                                         flags |= MSG_SPAM;
5345                                 else
5346                                         flags &= ~MSG_SPAM;
5347                                 if (gslist_find_next_num(&deleted, msginfo->msgnum) == msginfo->msgnum)
5348                                         flags |= MSG_DELETED;
5349                                 else
5350                                         flags &= ~MSG_DELETED;
5351                         }
5352                 } else {
5353                         if (flags_hash != NULL) {
5354
5355                                 flags = GPOINTER_TO_INT(g_hash_table_lookup(flags_hash,
5356                                                 GINT_TO_POINTER(msginfo->msgnum)));
5357                         }
5358
5359                         if ((flags & MSG_UNREAD) == 0)
5360                                 flags &= ~MSG_NEW;
5361                         else if (wasnew)
5362                                 flags |= MSG_NEW;
5363                         flags |= oldflags;
5364
5365                         if (tags_hash != NULL) {
5366                                 GSList *tags = g_hash_table_lookup(tags_hash, GINT_TO_POINTER(msginfo->msgnum));
5367                                 GSList *cur;
5368
5369                                 g_slist_free(msginfo->tags);
5370                                 msginfo->tags = NULL;
5371
5372                                 for (cur = tags; cur; cur = cur->next) {
5373                                         gchar *real_tag = imap_modified_utf7_to_utf8(cur->data, TRUE);
5374                                         gint id = 0;
5375                                         id = tags_get_id_for_str(real_tag);
5376                                         if (id == -1) {
5377                                                 id = tags_add_tag(real_tag);
5378                                                 got_alien_tags = TRUE;
5379                                         }
5380                                         msginfo->tags = g_slist_append(
5381                                                                 msginfo->tags,
5382                                                                 GINT_TO_POINTER(id));
5383                                         g_free(real_tag);
5384                                 }
5385                                 slist_free_strings_full(tags);
5386                         }
5387                 }
5388
5389                 g_hash_table_insert(msgflags, msginfo, GINT_TO_POINTER(flags));
5390         }
5391
5392         if (got_alien_tags) {
5393                 tags_write_tags();
5394                 main_window_reflect_tags_changes(mainwindow_get_mainwindow());
5395         }
5396
5397         if (flags_hash)
5398                 g_hash_table_destroy(flags_hash);
5399         if (tags_hash)
5400                 g_hash_table_destroy(tags_hash);
5401
5402         imap_lep_set_free(seq_list);
5403         g_slist_free(flagged);
5404         g_slist_free(deleted);
5405         g_slist_free(answered);
5406         g_slist_free(forwarded);
5407         g_slist_free(spam);
5408         g_slist_free(unseen);
5409         g_slist_free(sorted_list);
5410
5411         stuff->done = TRUE;
5412         return GINT_TO_POINTER(0);
5413 }
5414
5415 static gint imap_get_flags(Folder *folder, FolderItem *item,
5416                            MsgInfoList *msginfo_list, GHashTable *msgflags)
5417 {
5418         gint result;
5419         get_flags_data *data = g_new0(get_flags_data, 1);
5420         data->done = FALSE;
5421         data->folder = folder;
5422         data->item = item;
5423         data->msginfo_list = msginfo_list;
5424         data->msgflags = msgflags;
5425         data->full_search = FALSE;
5426
5427         GSList *tmp = NULL, *cur;
5428
5429         if (prefs_common.work_offline &&
5430             !inc_offline_should_override(FALSE,
5431                 _("Claws Mail needs network access in order "
5432                   "to access the IMAP server."))) {
5433                 g_free(data);
5434                 return -1;
5435         }
5436
5437         tmp = folder_item_get_msg_list(item);
5438
5439         if (g_slist_length(tmp) <= g_slist_length(msginfo_list))
5440                 data->full_search = TRUE;
5441
5442         for (cur = tmp; cur; cur = cur->next)
5443                 procmsg_msginfo_free((MsgInfo **)&(cur->data));
5444
5445         g_slist_free(tmp);
5446
5447         result = GPOINTER_TO_INT(imap_get_flags_thread(data));
5448
5449         g_free(data);
5450         return result;
5451
5452 }
5453
5454 static gboolean process_flags(gpointer key, gpointer value, gpointer user_data)
5455 {
5456         gboolean flags_set = GPOINTER_TO_INT(user_data);
5457         gint flags_value = GPOINTER_TO_INT(key);
5458         hashtable_data *data = (hashtable_data *)value;
5459         IMAPFolderItem *_item = data->item;
5460         FolderItem *item = (FolderItem *)_item;
5461         gint ok = MAILIMAP_ERROR_BAD_STATE;
5462         IMAPSession *session = NULL;
5463
5464         debug_print("getting session...\n");
5465         session = imap_session_get(item->folder);
5466
5467         data->msglist = g_slist_reverse(data->msglist);
5468
5469         debug_print("IMAP %ssetting flags to %d for %d messages\n",
5470                 flags_set?"":"un",
5471                 flags_value,
5472                 g_slist_length(data->msglist));
5473
5474         lock_session(session);
5475         if (session) {
5476                 ok = imap_select(session, IMAP_FOLDER(item->folder), item,
5477                          NULL, NULL, NULL, NULL, NULL, FALSE);
5478         }
5479         if (ok == MAILIMAP_NO_ERROR) {
5480                 ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item),
5481                         data->msglist, flags_value, NULL, flags_set);
5482         } else {
5483                 g_warning("can't select mailbox %s", item->path);
5484         }
5485
5486         if (!is_fatal(ok))
5487                 unlock_session(session);
5488
5489         g_slist_free(data->msglist);
5490         g_free(data);
5491         return TRUE;
5492 }
5493
5494 static gboolean process_tags(gpointer key, gpointer value, gpointer user_data)
5495 {
5496         gboolean tags_set = GPOINTER_TO_INT(user_data);
5497         TagsData *data = (TagsData *)value;
5498         IMAPFolderItem *_item = data->item;
5499         FolderItem *item = (FolderItem *)_item;
5500         gchar *str = data->str;
5501         gint ok = MAILIMAP_ERROR_BAD_STATE;
5502         IMAPSession *session = NULL;
5503
5504         debug_print("getting session...\n");
5505         session = imap_session_get(item->folder);
5506
5507         data->msglist = g_slist_reverse(data->msglist);
5508
5509         debug_print("IMAP %ssetting tags %s for %d messages\n",
5510                 tags_set?"":"un",
5511                 str,
5512                 g_slist_length(data->msglist));
5513
5514         lock_session(session);
5515         if (session) {
5516                 ok = imap_select(session, IMAP_FOLDER(item->folder), item,
5517                          NULL, NULL, NULL, NULL, NULL, FALSE);
5518         }
5519         if (ok == MAILIMAP_NO_ERROR) {
5520                 GSList list;
5521                 list.data = str;
5522                 list.next = NULL;
5523                 ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item),
5524                         data->msglist, 0, &list, tags_set);
5525         } else {
5526                 g_warning("can't select mailbox %s", item->path);
5527         }
5528
5529         if (!is_fatal(ok))
5530                 unlock_session(session);
5531
5532         g_slist_free(data->msglist);
5533         g_free(data->str);
5534         g_free(data);
5535         return TRUE;
5536 }
5537
5538 static void process_hashtable(IMAPFolderItem *item)
5539 {
5540         if (item->flags_set_table) {
5541                 g_hash_table_foreach_remove(item->flags_set_table, process_flags, GINT_TO_POINTER(TRUE));
5542                 g_hash_table_destroy(item->flags_set_table);
5543                 item->flags_set_table = NULL;
5544         }
5545         if (item->flags_unset_table) {
5546                 g_hash_table_foreach_remove(item->flags_unset_table, process_flags, GINT_TO_POINTER(FALSE));
5547                 g_hash_table_destroy(item->flags_unset_table);
5548                 item->flags_unset_table = NULL;
5549         }
5550         if (item->tags_set_table) {
5551                 g_hash_table_foreach_remove(item->tags_set_table, process_tags, GINT_TO_POINTER(TRUE));
5552                 g_hash_table_destroy(item->tags_set_table);
5553                 item->tags_set_table = NULL;
5554         }
5555         if (item->tags_unset_table) {
5556                 g_hash_table_foreach_remove(item->tags_unset_table, process_tags, GINT_TO_POINTER(FALSE));
5557                 g_hash_table_destroy(item->tags_unset_table);
5558                 item->tags_unset_table = NULL;
5559         }
5560
5561 }
5562
5563 static void imap_set_batch (Folder *folder, FolderItem *_item, gboolean batch)
5564 {
5565         IMAPFolderItem *item = (IMAPFolderItem *)_item;
5566         IMAPSession *session;
5567
5568         g_return_if_fail(item != NULL);
5569
5570         if (item->batching == batch)
5571                 return;
5572
5573         if (batch) {
5574                 item->batching = TRUE;
5575                 debug_print("IMAP switching to batch mode\n");
5576                 if (!item->flags_set_table) {
5577                         item->flags_set_table = g_hash_table_new(NULL, g_direct_equal);
5578                 }
5579                 if (!item->flags_unset_table) {
5580                         item->flags_unset_table = g_hash_table_new(NULL, g_direct_equal);
5581                 }
5582                 if (!item->tags_set_table) {
5583                         item->tags_set_table = g_hash_table_new(NULL, g_direct_equal);
5584                 }
5585                 if (!item->tags_unset_table) {
5586                         item->tags_unset_table = g_hash_table_new(NULL, g_direct_equal);
5587                 }
5588                 session = imap_session_get(folder);
5589                 if (session) {
5590                         imap_refresh_sensitivity(session);
5591                         session->sens_update_block = TRUE;
5592                 }
5593         } else {
5594                 debug_print("IMAP switching away from batch mode\n");
5595                 /* process stuff */
5596                 process_hashtable(item);
5597                 item->batching = FALSE;
5598                 session = imap_session_get(folder);
5599                 if (session) {
5600                         session->sens_update_block = FALSE;
5601                         imap_refresh_sensitivity(session);
5602                 }
5603         }
5604 }
5605
5606
5607
5608 /* data types conversion libetpan <-> claws */
5609
5610
5611
5612 #define ETPAN_IMAP_MB_MARKED      1
5613 #define ETPAN_IMAP_MB_UNMARKED    2
5614 #define ETPAN_IMAP_MB_NOSELECT    4
5615 #define ETPAN_IMAP_MB_NOINFERIORS 8
5616
5617 static int imap_flags_to_flags(struct mailimap_mbx_list_flags * imap_flags)
5618 {
5619   int flags;
5620   clistiter * cur;
5621
5622   flags = 0;
5623   if (imap_flags->mbf_type == MAILIMAP_MBX_LIST_FLAGS_SFLAG) {
5624     switch (imap_flags->mbf_sflag) {
5625     case MAILIMAP_MBX_LIST_SFLAG_MARKED:
5626       flags |= ETPAN_IMAP_MB_MARKED;
5627       break;
5628     case MAILIMAP_MBX_LIST_SFLAG_NOSELECT:
5629       flags |= ETPAN_IMAP_MB_NOSELECT;
5630       break;
5631     case MAILIMAP_MBX_LIST_SFLAG_UNMARKED:
5632       flags |= ETPAN_IMAP_MB_UNMARKED;
5633       break;
5634     }
5635   }
5636
5637   if (imap_flags->mbf_oflags) {
5638     for(cur = clist_begin(imap_flags->mbf_oflags) ; cur != NULL ;
5639         cur = clist_next(cur)) {
5640       struct mailimap_mbx_list_oflag * oflag;
5641
5642       oflag = clist_content(cur);
5643
5644       switch (oflag->of_type) {
5645       case MAILIMAP_MBX_LIST_OFLAG_NOINFERIORS:
5646         flags |= ETPAN_IMAP_MB_NOINFERIORS;
5647         break;
5648       }
5649     }
5650   }
5651   return flags;
5652 }
5653
5654 static GSList * imap_list_from_lep(IMAPFolder * folder,
5655                                    clist * list, const gchar * real_path, gboolean all)
5656 {
5657         clistiter * iter;
5658         GSList * item_list = NULL, *llast = NULL;
5659
5660         if (list) {
5661                 for(iter = clist_begin(list) ; iter != NULL ;
5662                     iter = clist_next(iter)) {
5663                         struct mailimap_mailbox_list * mb;
5664                         int flags;
5665                         char delimiter;
5666                         char * name;
5667                         char * dup_name;
5668                         gchar * base;
5669                         gchar * loc_name;
5670                         gchar * loc_path;
5671                         FolderItem *new_item;
5672
5673                         mb = clist_content(iter);
5674
5675                         if (mb == NULL)
5676                                 continue;
5677
5678                         flags = 0;
5679                         if (mb->mb_flag != NULL)
5680                                 flags = imap_flags_to_flags(mb->mb_flag);
5681
5682                         delimiter = mb->mb_delimiter;
5683                         name = mb->mb_name;
5684
5685                         dup_name = strdup(name);
5686                         if (delimiter != '\0')
5687                                 subst_char(dup_name, delimiter, '/');
5688
5689                         base = g_path_get_basename(dup_name);
5690                         if (base[0] == '.') {
5691                                 g_free(base);
5692                                 free(dup_name);
5693                                 continue;
5694                         }
5695                         if (!all && path_cmp(name, real_path) == 0) {
5696                                 g_free(base);
5697                                 free(dup_name);
5698                                 continue;
5699                         }
5700
5701                         if (!all && dup_name[strlen(dup_name)-1] == '/') {
5702                                 g_free(base);
5703                                 free(dup_name);
5704                                 continue;
5705                         }
5706
5707                         loc_name = imap_modified_utf7_to_utf8(base, FALSE);
5708                         loc_path = imap_modified_utf7_to_utf8(dup_name, FALSE);
5709
5710                         new_item = folder_item_new(FOLDER(folder), loc_name, loc_path);
5711                         if ((flags & ETPAN_IMAP_MB_NOINFERIORS) != 0)
5712                                 new_item->no_sub = TRUE;
5713                         if (strcasecmp(dup_name, "INBOX") != 0 &&
5714                             ((flags & ETPAN_IMAP_MB_NOSELECT) != 0))
5715                                 new_item->no_select = TRUE;
5716
5717                         if (item_list == NULL)
5718                                 llast = item_list = g_slist_append(item_list, new_item);
5719                         else {
5720                                 llast = g_slist_append(llast, new_item);
5721                                 llast = llast->next;
5722                         }
5723                         debug_print("folder '%s' found.\n", loc_path);
5724                         g_free(base);
5725                         g_free(loc_path);
5726                         g_free(loc_name);
5727
5728                         free(dup_name);
5729                 }
5730         }
5731         return item_list;
5732 }
5733
5734 static GSList * imap_get_lep_set_from_numlist(IMAPFolder *folder, MsgNumberList *numlist)
5735 {
5736         GSList *sorted_list, *cur;
5737         guint first, last, next;
5738         GSList *ret_list = NULL, *llast = NULL;
5739         struct mailimap_set * current_set;
5740         unsigned int item_count;
5741
5742         if (numlist == NULL)
5743                 return NULL;
5744
5745         current_set = mailimap_set_new_empty();
5746
5747         sorted_list = g_slist_copy(numlist);
5748         sorted_list = g_slist_sort(sorted_list, g_int_compare);
5749
5750         first = GPOINTER_TO_INT(sorted_list->data);
5751
5752         item_count = 0;
5753         for (cur = sorted_list; cur != NULL; cur = g_slist_next(cur)) {
5754                 if (GPOINTER_TO_INT(cur->data) == 0)
5755                         continue;
5756
5757                 item_count ++;
5758
5759                 last = GPOINTER_TO_INT(cur->data);
5760                 if (cur->next)
5761                         next = GPOINTER_TO_INT(cur->next->data);
5762                 else
5763                         next = 0;
5764
5765                 if (last + 1 != next || next == 0 || item_count >= folder->max_set_size) {
5766
5767                         struct mailimap_set_item * item;
5768                         item = mailimap_set_item_new(first, last);
5769                         mailimap_set_add(current_set, item);
5770
5771                         first = next;
5772
5773                         if (item_count >= folder->max_set_size) {
5774                                 if (ret_list == NULL)
5775                                         llast = ret_list = g_slist_append(ret_list,
5776                                                           current_set);
5777                                 else {
5778                                         llast = g_slist_append(llast, current_set);
5779                                         llast = llast->next;
5780                                 }
5781
5782                                 current_set = mailimap_set_new_empty();
5783                                 item_count = 0;
5784                         }
5785                 }
5786         }
5787
5788         if (clist_count(current_set->set_list) > 0) {
5789                 ret_list = g_slist_append(ret_list,
5790                                           current_set);
5791         }
5792
5793         g_slist_free(sorted_list);
5794
5795         return ret_list;
5796 }
5797
5798 static GSList * imap_get_lep_set_from_msglist(IMAPFolder *folder, MsgInfoList *msglist)
5799 {
5800         MsgNumberList *numlist = NULL;
5801         GSList *seq_list;
5802
5803         numlist = procmsg_get_number_list_for_msgs(msglist);
5804
5805         seq_list = imap_get_lep_set_from_numlist(folder, numlist);
5806         g_slist_free(numlist);
5807
5808         return seq_list;
5809 }
5810
5811 static GSList * imap_uid_list_from_lep(clist * list, gint* length)
5812 {
5813         clistiter * iter;
5814         GSList * result;
5815         gint len = 0;
5816
5817         result = NULL;
5818
5819         if (list) {
5820                 for(iter = clist_begin(list) ; iter != NULL ;
5821                     iter = clist_next(iter)) {
5822                         uint32_t * puid;
5823
5824                         puid = clist_content(iter);
5825                         result = g_slist_prepend(result, GINT_TO_POINTER(* puid));
5826                         len++;
5827                 }
5828                 result = g_slist_reverse(result);
5829         }
5830         if (length)
5831                 *length = len;
5832         return result;
5833 }
5834
5835 static GSList * imap_uid_list_from_lep_tab(carray * list)
5836 {
5837         unsigned int i;
5838         GSList * result;
5839
5840         result = NULL;
5841
5842         for(i = 0 ; i < carray_count(list) ; i ++) {
5843                 uint32_t * puid;
5844
5845                 puid = carray_get(list, i);
5846                 result = g_slist_prepend(result, GINT_TO_POINTER(* puid));
5847         }
5848         result = g_slist_reverse(result);
5849         return result;
5850 }
5851
5852 static void imap_flags_hash_from_lep_uid_flags_tab(carray * list,
5853                                                    GHashTable * hash,
5854                                                    GHashTable * tags_hash)
5855 {
5856         unsigned int i;
5857
5858         for(i = 0 ; i < carray_count(list) ; i += 3) {
5859                 uint32_t * puid;
5860                 int * pflags;
5861                 GSList *tags;
5862
5863                 puid = carray_get(list, i);
5864                 pflags = carray_get(list, i + 1);
5865                 tags = carray_get(list, i + 2);
5866
5867                 g_hash_table_insert(hash, GINT_TO_POINTER(*puid), GINT_TO_POINTER(* pflags));
5868                 g_hash_table_insert(tags_hash, GINT_TO_POINTER(*puid), tags);
5869         }
5870 }
5871
5872 static MsgInfo *imap_envelope_from_lep(struct imap_fetch_env_info * info,
5873                                        FolderItem *item)
5874 {
5875         MsgInfo *msginfo = NULL;
5876         guint32 uid = 0;
5877         goffset size = 0;
5878         MsgFlags flags = {0, 0};
5879
5880         if (info->headers == NULL)
5881                 return NULL;
5882
5883         MSG_SET_TMP_FLAGS(flags, MSG_IMAP);
5884         if (folder_has_parent_of_type(item, F_QUEUE)) {
5885                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
5886         } else if (folder_has_parent_of_type(item, F_DRAFT)) {
5887                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
5888         }
5889         flags.perm_flags = info->flags;
5890
5891         uid = info->uid;
5892         size = (goffset) info->size;
5893         msginfo = procheader_parse_str(info->headers, flags, FALSE, FALSE);
5894
5895         if (msginfo) {
5896                 msginfo->msgnum = uid;
5897                 msginfo->size = size;
5898         }
5899
5900         return msginfo;
5901 }
5902
5903 static void imap_lep_set_free(GSList *seq_list)
5904 {
5905         GSList * cur;
5906
5907         for(cur = seq_list ; cur != NULL ; cur = g_slist_next(cur)) {
5908                 struct mailimap_set * imapset;
5909
5910                 imapset = cur->data;
5911                 mailimap_set_free(imapset);
5912         }
5913         g_slist_free(seq_list);
5914 }
5915
5916 static struct mailimap_flag_list * imap_flag_to_lep(IMAPFolderItem *item, IMAPFlags flags, GSList *tags)
5917 {
5918         struct mailimap_flag_list * flag_list;
5919         GSList *cur = tags;
5920
5921         flag_list = mailimap_flag_list_new_empty();
5922
5923         if (IMAP_IS_SEEN(flags))
5924                 mailimap_flag_list_add(flag_list,
5925                                        mailimap_flag_new_seen());
5926         if (IMAP_IS_ANSWERED(flags))
5927                 mailimap_flag_list_add(flag_list,
5928                                        mailimap_flag_new_answered());
5929         if (IMAP_IS_FLAGGED(flags))
5930                 mailimap_flag_list_add(flag_list,
5931                                        mailimap_flag_new_flagged());
5932         if (IMAP_IS_DELETED(flags))
5933                 mailimap_flag_list_add(flag_list,
5934                                        mailimap_flag_new_deleted());
5935         if (IMAP_IS_DRAFT(flags))
5936                 mailimap_flag_list_add(flag_list,
5937                                        mailimap_flag_new_draft());
5938         if (IMAP_IS_FORWARDED(flags) && flag_ok(item, IMAP_FLAG_FORWARDED))
5939                 mailimap_flag_list_add(flag_list,
5940                                        mailimap_flag_new_flag_keyword(strdup(RTAG_FORWARDED)));
5941         if (IMAP_IS_SPAM(flags) && flag_ok(item, IMAP_FLAG_SPAM))
5942                 mailimap_flag_list_add(flag_list,
5943                                        mailimap_flag_new_flag_keyword(strdup(RTAG_JUNK)));
5944         else if (IMAP_IS_HAM(flags) && flag_ok(item, IMAP_FLAG_HAM))
5945                 mailimap_flag_list_add(flag_list,
5946                                        mailimap_flag_new_flag_keyword(strdup(RTAG_NON_JUNK)));
5947
5948         for (; cur; cur = cur->next) {
5949                 gchar *enc_str =
5950                         imap_utf8_to_modified_utf7(cur->data, TRUE);
5951                 g_strstrip(enc_str);
5952
5953                 mailimap_flag_list_add(flag_list,
5954                         mailimap_flag_new_flag_keyword(enc_str));
5955         }
5956
5957         return flag_list;
5958 }
5959
5960 guint imap_folder_get_refcnt(Folder *folder)
5961 {
5962         return ((IMAPFolder *)folder)->refcnt;
5963 }
5964
5965 void imap_folder_ref(Folder *folder)
5966 {
5967         ((IMAPFolder *)folder)->refcnt++;
5968 }
5969
5970 void imap_disconnect_all(gboolean have_connectivity)
5971 {
5972         GList *list;
5973         gboolean short_timeout;
5974 #ifdef HAVE_NETWORKMANAGER_SUPPORT
5975         GError *error = NULL;
5976
5977         short_timeout = !networkmanager_is_online(&error);
5978         if(error) {
5979                 short_timeout = TRUE;
5980                 g_error_free(error);
5981         }
5982 #else
5983         short_timeout = TRUE;
5984 #endif
5985
5986         if(short_timeout)
5987                 imap_main_set_timeout(1);
5988
5989         for (list = account_get_list(); list != NULL; list = list->next) {
5990                 PrefsAccount *account = list->data;
5991                 if (account->protocol == A_IMAP4) {
5992                         RemoteFolder *folder = (RemoteFolder *)account->folder;
5993                         if (folder && folder->session) {
5994                                 if (imap_is_busy(FOLDER(folder)))
5995                                         imap_threaded_cancel(FOLDER(folder));
5996
5997                                 IMAPSession *session = (IMAPSession *)folder->session;
5998                                 if (have_connectivity)
5999                                         imap_threaded_disconnect(FOLDER(folder));
6000                                 SESSION(session)->state = SESSION_DISCONNECTED;
6001                                 SESSION(session)->sock = NULL;
6002                                 imap_safe_destroy(session);
6003                                 folder->session = NULL;
6004                         }
6005                 }
6006         }
6007
6008         if(short_timeout)
6009                 imap_main_set_timeout(prefs_common.io_timeout_secs);
6010 }
6011
6012 void imap_folder_unref(Folder *folder)
6013 {
6014         if (((IMAPFolder *)folder)->refcnt > 0)
6015                 ((IMAPFolder *)folder)->refcnt--;
6016 }
6017
6018 void imap_cancel_all(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                                 IMAPSession *imap_session;
6030                                 RemoteFolder *rfolder;
6031
6032                                 g_printerr("cancelled\n");
6033                                 imap_threaded_cancel(folder);
6034                                 rfolder = (RemoteFolder *) folder;
6035                                 imap_session = (IMAPSession *) rfolder->session;
6036                                 if (imap_session)
6037                                         imap_session->cancelled = 1;
6038                         }
6039                 }
6040         }
6041 }
6042
6043 gboolean imap_cancel_all_enabled(void)
6044 {
6045         GList *folderlist;
6046         GList *cur;
6047
6048         folderlist = folder_get_list();
6049         for (cur = folderlist; cur != NULL; cur = g_list_next(cur)) {
6050                 Folder *folder = (Folder *) cur->data;
6051
6052                 if (folder->klass == &imap_class) {
6053                         if (imap_is_busy(folder)) {
6054                                 return TRUE;
6055                         }
6056                 }
6057         }
6058
6059         return FALSE;
6060 }
6061
6062 static gboolean imap_is_busy(Folder *folder)
6063 {
6064         IMAPSession *imap_session;
6065         RemoteFolder *rfolder;
6066
6067         rfolder = (RemoteFolder *) folder;
6068         imap_session = (IMAPSession *) rfolder->session;
6069         if (imap_session == NULL)
6070                 return FALSE;
6071
6072         return imap_session->busy;
6073 }
6074
6075 #else /* HAVE_LIBETPAN */
6076
6077 static FolderClass imap_class;
6078
6079 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item);
6080 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag);
6081
6082 static Folder   *imap_folder_new        (const gchar    *name,
6083                                          const gchar    *path)
6084 {
6085         static gboolean missing_imap_warning = TRUE;
6086         if (missing_imap_warning) {
6087                 missing_imap_warning = FALSE;
6088                 alertpanel_error(
6089                         _("You have one or more IMAP accounts "
6090                           "defined. However this version of "
6091                           "Claws Mail has been built without "
6092                           "IMAP support; your IMAP account(s) are "
6093                           "disabled.\n\n"
6094                           "You probably need to "
6095                           "install libetpan and recompile "
6096                           "Claws Mail."));
6097         }
6098         return NULL;
6099 }
6100 static gint     imap_create_tree        (Folder         *folder)
6101 {
6102         return -1;
6103 }
6104 static FolderItem *imap_create_folder   (Folder         *folder,
6105                                          FolderItem     *parent,
6106                                          const gchar    *name)
6107 {
6108         return NULL;
6109 }
6110 static gint     imap_rename_folder      (Folder         *folder,
6111                                          FolderItem     *item,
6112                                          const gchar    *name)
6113 {
6114         return -1;
6115 }
6116
6117 gchar imap_get_path_separator_for_item(FolderItem *item)
6118 {
6119         return '/';
6120 }
6121
6122 FolderClass *imap_get_class(void)
6123 {
6124         if (imap_class.idstr == NULL) {
6125                 imap_class.type = F_IMAP;
6126                 imap_class.idstr = "imap";
6127                 imap_class.uistr = "IMAP4";
6128
6129                 imap_class.new_folder = imap_folder_new;
6130                 imap_class.create_tree = imap_create_tree;
6131                 imap_class.create_folder = imap_create_folder;
6132                 imap_class.rename_folder = imap_rename_folder;
6133
6134                 imap_class.set_xml = folder_set_xml;
6135                 imap_class.get_xml = folder_get_xml;
6136                 imap_class.item_set_xml = imap_item_set_xml;
6137                 imap_class.item_get_xml = imap_item_get_xml;
6138                 /* nothing implemented */
6139         }
6140
6141         return &imap_class;
6142 }
6143
6144 void imap_disconnect_all(gboolean have_connectivity)
6145 {
6146 }
6147
6148 gint imap_subscribe(Folder *folder, FolderItem *item, gchar *rpath, gboolean sub)
6149 {
6150         return -1;
6151 }
6152
6153 GList * imap_scan_subtree(Folder *folder, FolderItem *item, gboolean unsubs_only, gboolean recursive)
6154 {
6155         return NULL;
6156 }
6157
6158 void imap_cache_msg(FolderItem *item, gint msgnum)
6159 {
6160 }
6161
6162 void imap_cancel_all(void)
6163 {
6164 }
6165
6166 gboolean imap_cancel_all_enabled(void)
6167 {
6168         return FALSE;
6169 }
6170
6171 #endif
6172
6173 #ifdef HAVE_LIBETPAN
6174 static void imap_synchronise(FolderItem *item, gint days)
6175 {
6176         if (IMAP_FOLDER_ITEM(item)->last_sync == IMAP_FOLDER_ITEM(item)->last_change) {
6177                 debug_print("%s already synced\n", item->path?item->path:item->name);
6178                 return;
6179         }
6180         debug_print("syncing %s\n", item->path?item->path:item->name);
6181         imap_gtk_synchronise(item, days);
6182         IMAP_FOLDER_ITEM(item)->last_sync = IMAP_FOLDER_ITEM(item)->last_change;
6183 }
6184 #endif
6185
6186 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag)
6187 {
6188 #ifdef HAVE_LIBETPAN
6189         GList *cur;
6190 #endif
6191         folder_item_set_xml(folder, item, tag);
6192
6193 #ifdef HAVE_LIBETPAN
6194         for (cur = tag->attr; cur != NULL; cur = g_list_next(cur)) {
6195                 XMLAttr *attr = (XMLAttr *) cur->data;
6196
6197                 if (!attr || !attr->name || !attr->value) continue;
6198                 if (!strcmp(attr->name, "uidnext"))
6199                         IMAP_FOLDER_ITEM(item)->uid_next = atoi(attr->value);
6200                 if (!strcmp(attr->name, "last_sync"))
6201                         IMAP_FOLDER_ITEM(item)->last_sync = atoi(attr->value);
6202                 if (!strcmp(attr->name, "last_change"))
6203                         IMAP_FOLDER_ITEM(item)->last_change = atoi(attr->value);
6204         }
6205         if (IMAP_FOLDER_ITEM(item)->last_change == 0)
6206                 IMAP_FOLDER_ITEM(item)->last_change = time(NULL);
6207 #endif
6208 }
6209
6210 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item)
6211 {
6212         XMLTag *tag;
6213
6214         tag = folder_item_get_xml(folder, item);
6215
6216 #ifdef HAVE_LIBETPAN
6217         xml_tag_add_attr(tag, xml_attr_new_int("uidnext",
6218                         IMAP_FOLDER_ITEM(item)->uid_next));
6219         xml_tag_add_attr(tag, xml_attr_new_int("last_sync",
6220                         IMAP_FOLDER_ITEM(item)->last_sync));
6221         xml_tag_add_attr(tag, xml_attr_new_int("last_change",
6222                         IMAP_FOLDER_ITEM(item)->last_change));
6223
6224 #endif
6225         return tag;
6226 }
6227
6228 /* ===================================================================
6229  * UTF-7 conversion routines as in RFC 2192
6230  * ===================================================================
6231  * These two functions from:
6232  * libimap library.
6233  * Copyright (C) 2003-2004 Pawel Salek. */
6234
6235 /* UTF7 modified base64 alphabet */
6236 static char base64chars[] =
6237   "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+,";
6238 #define UNDEFINED 64
6239
6240 /* UTF16 definitions */
6241 #define UTF16MASK       0x03FFUL
6242 #define UTF16SHIFT      10
6243 #define UTF16BASE       0x10000UL
6244 #define UTF16HIGHSTART  0xD800UL
6245 #define UTF16HIGHEND    0xDBFFUL
6246 #define UTF16LOSTART    0xDC00UL
6247 #define UTF16LOEND      0xDFFFUL
6248
6249
6250 /* Convert an IMAP mailbox to a UTF-8 string.
6251  *  dst needs to have roughly 4 times the storage space of src
6252  *    Hex encoding can triple the size of the input
6253  *    UTF-7 can be slightly denser than UTF-8
6254  *     (worst case: 8 octets UTF-7 becomes 9 octets UTF-8)
6255  */
6256 char* imap_modified_utf7_to_utf8(const char *mbox, gboolean change_spaces)
6257 {
6258   unsigned c, i, bitcount;
6259   unsigned long ucs4, utf16, bitbuf;
6260   unsigned char base64[256];
6261   const char *src;
6262   char *dst, *res  = g_malloc(2*strlen(mbox)+1);
6263
6264   dst = res;
6265   src = mbox;
6266   if(!dst) return NULL;
6267   /* initialize modified base64 decoding table */
6268   memset(base64, UNDEFINED, sizeof (base64));
6269   for (i = 0; i < sizeof (base64chars); ++i) {
6270     base64[(unsigned)base64chars[i]] = i;
6271   }
6272
6273   /* loop until end of string */
6274   while (*src != '\0') {
6275     c = *src++;
6276     /* deal with literal characters and &- */
6277     if (c != '&' || *src == '-') {
6278       /* encode literally */
6279       if (change_spaces && c == '_')
6280         *dst++ = ' ';
6281       else
6282         *dst++ = c;
6283       /* skip over the '-' if this is an &- sequence */
6284       if (c == '&') ++src;
6285     } else {
6286       /* convert modified UTF-7 -> UTF-16 -> UCS-4 -> UTF-8 -> HEX */
6287       bitbuf = 0;
6288       bitcount = 0;
6289       ucs4 = 0;
6290       while ((c = base64[(unsigned char) *src]) != UNDEFINED) {
6291         ++src;
6292         bitbuf = (bitbuf << 6) | c;
6293         bitcount += 6;
6294         /* enough bits for a UTF-16 character? */
6295         if (bitcount >= 16) {
6296           bitcount -= 16;
6297           utf16 = (bitcount ? bitbuf >> bitcount
6298                    : bitbuf) & 0xffff;
6299           /* convert UTF16 to UCS4 */
6300           if
6301             (utf16 >= UTF16HIGHSTART && utf16 <= UTF16HIGHEND) {
6302             ucs4 = (utf16 - UTF16HIGHSTART) << UTF16SHIFT;
6303             continue;
6304           } else if
6305             (utf16 >= UTF16LOSTART && utf16 <= UTF16LOEND) {
6306             ucs4 += utf16 - UTF16LOSTART + UTF16BASE;
6307           } else {
6308             ucs4 = utf16;
6309           }
6310
6311           /* convert UTF-16 range of UCS4 to UTF-8 */
6312           if (ucs4 <= 0x7fUL) {
6313             dst[0] = ucs4;
6314             dst += 1;
6315           } else if (ucs4 <= 0x7ffUL) {
6316             dst[0] = 0xc0 | (ucs4 >> 6);
6317             dst[1] = 0x80 | (ucs4 & 0x3f);
6318             dst += 2;
6319           } else if (ucs4 <= 0xffffUL) {
6320             dst[0] = 0xe0 | (ucs4 >> 12);
6321             dst[1] = 0x80 | ((ucs4 >> 6) & 0x3f);
6322             dst[2] = 0x80 | (ucs4 & 0x3f);
6323             dst += 3;
6324           } else {
6325             dst[0] = 0xf0 | (ucs4 >> 18);
6326             dst[1] = 0x80 | ((ucs4 >> 12) & 0x3f);
6327             dst[2] = 0x80 | ((ucs4 >> 6) & 0x3f);
6328             dst[3] = 0x80 | (ucs4 & 0x3f);
6329             dst += 4;
6330           }
6331         }
6332       }
6333       /* skip over trailing '-' in modified UTF-7 encoding */
6334       if (*src == '-') ++src;
6335     }
6336   }
6337   /* terminate destination string */
6338   *dst = '\0';
6339   return res;
6340 }
6341
6342 /* Convert hex coded UTF-8 string to modified UTF-7 IMAP mailbox
6343  *  dst should be about twice the length of src to deal with non-hex
6344  *  coded URLs
6345  */
6346 char* imap_utf8_to_modified_utf7(const char *src, gboolean change_spaces)
6347 {
6348   unsigned int utf8pos, utf8total, c, utf7mode, bitstogo, utf16flag;
6349   unsigned long ucs4 = 0, bitbuf = 0;
6350
6351   /* initialize hex lookup table */
6352   char *dst, *res;
6353
6354   if (!src) return NULL;
6355
6356   res = malloc(2*strlen(src)+1);
6357   dst = res;
6358   if(!dst) return NULL;
6359
6360   utf7mode = 0;
6361   utf8total = 0;
6362   bitstogo = 0;
6363   utf8pos = 0;
6364   while ((c = (unsigned char)*src) != '\0') {
6365     ++src;
6366     /* normal character? */
6367     if (c >= ' ' && c <= '~' && (c != '_' || !change_spaces)) {
6368       /* switch out of UTF-7 mode */
6369       if (utf7mode) {
6370         if (bitstogo) {
6371           *dst++ = base64chars[(bitbuf << (6 - bitstogo)) & 0x3F];
6372         }
6373         *dst++ = '-';
6374         utf7mode = 0;
6375         utf8pos  = 0;
6376         bitstogo = 0;
6377         utf8total= 0;
6378       }
6379       if (change_spaces && c == ' ')
6380         *dst++ = '_';
6381       else
6382         *dst++ = c;
6383       /* encode '&' as '&-' */
6384       if (c == '&') {
6385         *dst++ = '-';
6386       }
6387       continue;
6388     }
6389     /* switch to UTF-7 mode */
6390     if (!utf7mode) {
6391       *dst++ = '&';
6392       utf7mode = 1;
6393     }
6394     /* Encode US-ASCII characters as themselves */
6395     if (c < 0x80) {
6396       ucs4 = c;
6397     } else if (utf8total) {
6398       /* save UTF8 bits into UCS4 */
6399       ucs4 = (ucs4 << 6) | (c & 0x3FUL);
6400       if (++utf8pos < utf8total) {
6401         continue;
6402       }
6403     } else {
6404       utf8pos = 1;
6405       if (c < 0xE0) {
6406         utf8total = 2;
6407         ucs4 = c & 0x1F;
6408       } else if (c < 0xF0) {
6409         utf8total = 3;
6410         ucs4 = c & 0x0F;
6411       } else {
6412         /* NOTE: can't convert UTF8 sequences longer than 4 */
6413         utf8total = 4;
6414         ucs4 = c & 0x03;
6415       }
6416       continue;
6417     }
6418     /* loop to split ucs4 into two utf16 chars if necessary */
6419     utf8total = 0;
6420     do {
6421       if (ucs4 >= UTF16BASE) {
6422         ucs4 -= UTF16BASE;
6423         bitbuf = (bitbuf << 16) | ((ucs4 >> UTF16SHIFT)
6424                                    + UTF16HIGHSTART);
6425         ucs4 = (ucs4 & UTF16MASK) + UTF16LOSTART;
6426         utf16flag = 1;
6427       } else {
6428         bitbuf = (bitbuf << 16) | ucs4;
6429         utf16flag = 0;
6430       }
6431       bitstogo += 16;
6432       /* spew out base64 */
6433       while (bitstogo >= 6) {
6434         bitstogo -= 6;
6435         *dst++ = base64chars[(bitstogo ? (bitbuf >> bitstogo)
6436                               : bitbuf)
6437                              & 0x3F];
6438       }
6439     } while (utf16flag);
6440   }
6441   /* if in UTF-7 mode, finish in ASCII */
6442   if (utf7mode) {
6443     if (bitstogo) {
6444       *dst++ = base64chars[(bitbuf << (6 - bitstogo)) & 0x3F];
6445     }
6446     *dst++ = '-';
6447   }
6448   /* tie off string */
6449   *dst = '\0';
6450   return res;
6451 }