src/imap.c

   1 /*
   2  * Claws Mail -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2016 Hiroyuki Yamamoto and the Claws Mail team
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #ifdef HAVE_CONFIG_H
  20 #  include "config.h"
  21 #include "claws-features.h"
  22 #endif
  23
  24 #include "defs.h"
  25
  26 #include <glib.h>
  27 #include <glib/gi18n.h>
  28 #include <stdio.h>
  29 #include <string.h>
  30 #include "imap.h"
  31 #include "imap_gtk.h"
  32 #include "inc.h"
  33 #include "xml.h"
  34 #include "alertpanel.h"
  35
  36 #ifdef HAVE_LIBETPAN
  37
  38 #include <stdlib.h>
  39 #include <dirent.h>
  40 #include <unistd.h>
  41 #include <ctype.h>
  42 #include <time.h>
  43 #include <errno.h>
  44 #if HAVE_ICONV
  45 #  include <iconv.h>
  46 #endif
  47
  48 #ifdef USE_GNUTLS
  49 #  include "ssl.h"
  50 #endif
  51
  52 #include "folder.h"
  53 #include "session.h"
  54 #include "procmsg.h"
  55 #include "socket.h"
  56 #include "recv.h"
  57 #include "procheader.h"
  58 #include "prefs_account.h"
  59 #include "codeconv.h"
  60 #include "md5.h"
  61 #include "utils.h"
  62 #include "prefs_common.h"
  63 #include "inputdialog.h"
  64 #include "log.h"
  65 #include "remotefolder.h"
  66 #include "claws.h"
  67 #include "statusbar.h"
  68 #include "msgcache.h"
  69 #include "imap-thread.h"
  70 #include "account.h"
  71 #include "tags.h"
  72 #include "main.h"
  73 #include "passwordstore.h"
  74
  75 typedef struct _IMAPFolder      IMAPFolder;
  76 typedef struct _IMAPSession     IMAPSession;
  77 typedef struct _IMAPNameSpace   IMAPNameSpace;
  78 typedef struct _IMAPFolderItem  IMAPFolderItem;
  79
  80 #include "prefs_account.h"
  81
  82 #define IMAP_FOLDER(obj)        ((IMAPFolder *)obj)
  83 #define IMAP_FOLDER_ITEM(obj)   ((IMAPFolderItem *)obj)
  84 #define IMAP_SESSION(obj)       ((IMAPSession *)obj)
  85
  86 struct _IMAPFolder
  87 {
  88         RemoteFolder rfolder;
  89
  90         /* list of IMAPNameSpace */
  91         GList *ns_personal;
  92         GList *ns_others;
  93         GList *ns_shared;
  94         gchar last_seen_separator;
  95         guint refcnt;
  96         guint max_set_size;
  97         gchar *search_charset;
  98         gboolean search_charset_supported;
  99 };
 100
 101 struct _IMAPSession
 102 {
 103         Session session;
 104
 105         gboolean authenticated;
 106
 107         GSList *capability;
 108         gboolean uidplus;
 109
 110         gchar *mbox;
 111         guint cmd_count;
 112
 113         /* CLAWS */
 114         gboolean folder_content_changed;
 115         guint exists;
 116         guint recent;
 117         guint expunge;
 118         guint unseen;
 119         guint uid_validity;
 120         guint uid_next;
 121
 122         Folder * folder;
 123         gboolean busy;
 124         gboolean cancelled;
 125         gboolean sens_update_block;
 126         gboolean do_destroy;
 127 };
 128
 129 struct _IMAPNameSpace
 130 {
 131         gchar *name;
 132         gchar separator;
 133 };
 134
 135 #define IMAPBUFSIZE     8192
 136
 137 #define IMAP_IS_SEEN(flags)     ((flags & IMAP_FLAG_SEEN) != 0)
 138 #define IMAP_IS_ANSWERED(flags) ((flags & IMAP_FLAG_ANSWERED) != 0)
 139 #define IMAP_IS_FLAGGED(flags)  ((flags & IMAP_FLAG_FLAGGED) != 0)
 140 #define IMAP_IS_DELETED(flags)  ((flags & IMAP_FLAG_DELETED) != 0)
 141 #define IMAP_IS_DRAFT(flags)    ((flags & IMAP_FLAG_DRAFT) != 0)
 142 #define IMAP_IS_FORWARDED(flags)        ((flags & IMAP_FLAG_FORWARDED) != 0)
 143 #define IMAP_IS_SPAM(flags)     ((flags & IMAP_FLAG_SPAM) != 0)
 144 #define IMAP_IS_HAM(flags)      ((flags & IMAP_FLAG_HAM) != 0)
 145
 146
 147 #define IMAP4_PORT      143
 148 #ifdef USE_GNUTLS
 149 #define IMAPS_PORT      993
 150 #endif
 151
 152 #define IMAP_CMD_LIMIT  1000
 153
 154 enum {
 155         ITEM_CAN_CREATE_FLAGS_UNKNOWN = 0,
 156         ITEM_CAN_CREATE_FLAGS,
 157         ITEM_CANNOT_CREATE_FLAGS
 158 };
 159
 160 struct _IMAPFolderItem
 161 {
 162         FolderItem item;
 163
 164         guint lastuid;
 165         guint uid_next;
 166         GSList *uid_list;
 167         gboolean batching;
 168
 169         GHashTable *flags_set_table;
 170         GHashTable *flags_unset_table;
 171         guint32 last_change;
 172         guint32 last_sync;
 173         gboolean should_update;
 174         gboolean should_trash_cache;
 175         gint can_create_flags;
 176
 177         GHashTable *tags_set_table;
 178         GHashTable *tags_unset_table;
 179         GSList *ok_flags;
 180
 181 };
 182
 183 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item);
 184 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag);
 185
 186 static void imap_folder_init            (Folder         *folder,
 187                                          const gchar    *name,
 188                                          const gchar    *path);
 189
 190 static Folder   *imap_folder_new        (const gchar    *name,
 191                                          const gchar    *path);
 192 static void      imap_folder_destroy    (Folder         *folder);
 193
 194 static IMAPSession *imap_session_new    (Folder         *folder,
 195                                          const PrefsAccount     *account);
 196 static gint     imap_session_authenticate(IMAPSession   *session,
 197                                           PrefsAccount  *account);
 198 static void     imap_session_destroy    (Session        *session);
 199
 200 static gchar   *imap_fetch_msg          (Folder         *folder,
 201                                          FolderItem     *item,
 202                                          gint            uid);
 203 static gchar   *imap_fetch_msg_full     (Folder         *folder,
 204                                          FolderItem     *item,
 205                                          gint            uid,
 206                                          gboolean        headers,
 207                                          gboolean        body);
 208 static void     imap_remove_cached_msg  (Folder         *folder,
 209                                          FolderItem     *item,
 210                                          MsgInfo        *msginfo);
 211 static gint     imap_add_msg            (Folder         *folder,
 212                                          FolderItem     *dest,
 213                                          const gchar    *file,
 214                                          MsgFlags       *flags);
 215 static gint     imap_add_msgs           (Folder         *folder,
 216                                          FolderItem     *dest,
 217                                          GSList         *file_list,
 218                                          GHashTable     *relation);
 219
 220 static gint     imap_copy_msg           (Folder         *folder,
 221                                          FolderItem     *dest,
 222                                          MsgInfo        *msginfo);
 223 static gint     imap_copy_msgs          (Folder         *folder,
 224                                          FolderItem     *dest,
 225                                          MsgInfoList    *msglist,
 226                                          GHashTable     *relation);
 227
 228 static gint     search_msgs             (Folder                 *folder,
 229                                          FolderItem             *container,
 230                                          MsgNumberList          **msgs,
 231                                          gboolean               *on_server,
 232                                          MatcherList            *predicate,
 233                                          SearchProgressNotify   progress_cb,
 234                                          gpointer               progress_data);
 235
 236 static gint     imap_remove_msg         (Folder         *folder,
 237                                          FolderItem     *item,
 238                                          gint            uid);
 239 static gint     imap_remove_msgs        (Folder         *folder,
 240                                          FolderItem     *dest,
 241                                          MsgInfoList    *msglist,
 242                                          GHashTable     *relation);
 243 static gint     imap_expunge            (Folder         *folder,
 244                                          FolderItem     *dest);
 245 static gint     imap_remove_all_msg     (Folder         *folder,
 246                                          FolderItem     *item);
 247
 248 static gboolean imap_is_msg_changed     (Folder         *folder,
 249                                          FolderItem     *item,
 250                                          MsgInfo        *msginfo);
 251
 252 static gint     imap_close              (Folder         *folder,
 253                                          FolderItem     *item);
 254
 255 static gint     imap_scan_tree          (Folder         *folder);
 256
 257 static gint     imap_create_tree        (Folder         *folder);
 258
 259 static FolderItem *imap_create_folder   (Folder         *folder,
 260                                          FolderItem     *parent,
 261                                          const gchar    *name);
 262 static gint     imap_rename_folder      (Folder         *folder,
 263                                          FolderItem     *item,
 264                                          const gchar    *name);
 265 static gint     imap_remove_folder      (Folder         *folder,
 266                                          FolderItem     *item);
 267
 268 static FolderItem *imap_folder_item_new (Folder         *folder);
 269 static void imap_folder_item_destroy    (Folder         *folder,
 270                                          FolderItem     *item);
 271
 272 static IMAPSession *imap_session_get    (Folder         *folder);
 273
 274 static gint imap_auth                   (IMAPSession    *session,
 275                                          const gchar    *user,
 276                                          const gchar    *pass,
 277                                          IMAPAuthType    type);
 278
 279 static gint imap_scan_tree_recursive    (IMAPSession    *session,
 280                                          FolderItem     *item,
 281                                          gboolean        subs_only);
 282
 283 static void imap_create_missing_folders (Folder         *folder);
 284 static FolderItem *imap_create_special_folder
 285                                         (Folder                 *folder,
 286                                          SpecialFolderItemType   stype,
 287                                          const gchar            *name);
 288
 289 static gint imap_do_copy_msgs           (Folder         *folder,
 290                                          FolderItem     *dest,
 291                                          MsgInfoList    *msglist,
 292                                          GHashTable     *relation,
 293                                          gboolean        same_dest_ok);
 294
 295 static gint imap_do_remove_msgs         (Folder         *folder,
 296                                          FolderItem     *dest,
 297                                          MsgInfoList    *msglist,
 298                                          GHashTable     *relation);
 299
 300 static void imap_delete_all_cached_messages     (FolderItem     *item);
 301 static void imap_set_batch              (Folder         *folder,
 302                                          FolderItem     *item,
 303                                          gboolean        batch);
 304 static gint imap_set_message_flags      (IMAPSession    *session,
 305                                          IMAPFolderItem *item,
 306                                          MsgNumberList  *numlist,
 307                                          IMAPFlags       flags,
 308                                          GSList         *tags,
 309                                          gboolean        is_set);
 310 static gint imap_select                 (IMAPSession    *session,
 311                                          IMAPFolder     *folder,
 312                                          FolderItem     *item,
 313                                          gint           *exists,
 314                                          gint           *recent,
 315                                          gint           *unseen,
 316                                          guint32        *uid_validity,
 317                                          gint           *can_create_flags,
 318                                          gboolean        block);
 319 static gint imap_status                 (IMAPSession    *session,
 320                                          IMAPFolder     *folder,
 321                                          const gchar    *path,
 322                                          IMAPFolderItem *item,
 323                                          gint           *messages,
 324                                          guint32        *uid_next,
 325                                          guint32        *uid_validity,
 326                                          gint           *unseen,
 327                                          gboolean        block);
 328 static void     imap_commit_tags        (FolderItem     *item,
 329                                          MsgInfo        *msginfo,
 330                                          GSList         *set_tags,
 331                                          GSList         *unset_tags);
 332
 333 static gchar imap_get_path_separator            (IMAPSession    *session,
 334                                                  IMAPFolder     *folder,
 335                                                  const gchar    *path,
 336                                                  gint           *ok);
 337 static gchar *imap_get_real_path                (IMAPSession    *session,
 338                                                  IMAPFolder     *folder,
 339                                                  const gchar    *path,
 340                                                  gint           *ok);
 341 #ifdef HAVE_LIBETPAN
 342 static void imap_synchronise            (FolderItem     *item, gint days);
 343 #endif
 344 static gboolean imap_is_busy            (Folder *folder);
 345
 346 static void imap_free_capabilities      (IMAPSession    *session);
 347
 348 /* low-level IMAP4rev1 commands */
 349 static gint imap_cmd_login      (IMAPSession    *session,
 350                                  const gchar    *user,
 351                                  const gchar    *pass,
 352                                  const gchar    *type);
 353 static gint imap_cmd_noop       (IMAPSession    *session);
 354 #ifdef USE_GNUTLS
 355 static gint imap_cmd_starttls   (IMAPSession    *session);
 356 #endif
 357 static gint imap_cmd_select     (IMAPSession    *session,
 358                                  const gchar    *folder,
 359                                  gint           *exists,
 360                                  gint           *recent,
 361                                  gint           *unseen,
 362                                  guint32        *uid_validity,
 363                                  gint           *can_create_flags,
 364                                  GSList         **ok_flags,
 365                                  gboolean        block);
 366 static gint imap_cmd_close      (IMAPSession    *session);
 367 static gint imap_cmd_examine    (IMAPSession    *session,
 368                                  const gchar    *folder,
 369                                  gint           *exists,
 370                                  gint           *recent,
 371                                  gint           *unseen,
 372                                  guint32        *uid_validity,
 373                                  gboolean        block);
 374 static gint imap_cmd_create     (IMAPSession    *sock,
 375                                  const gchar    *folder);
 376 static gint imap_cmd_rename     (IMAPSession    *sock,
 377                                  const gchar    *oldfolder,
 378                                  const gchar    *newfolder);
 379 static gint imap_cmd_delete     (IMAPSession    *session,
 380                                  const gchar    *folder);
 381 static gint imap_cmd_fetch      (IMAPSession    *sock,
 382                                  guint32         uid,
 383                                  const gchar    *filename,
 384                                  gboolean        headers,
 385                                  gboolean        body);
 386 static gint imap_cmd_append     (IMAPSession    *session,
 387                                  IMAPFolderItem *item,
 388                                  const gchar    *destfolder,
 389                                  const gchar    *file,
 390                                  IMAPFlags       flags,
 391                                  guint32        *new_uid);
 392 static gint imap_cmd_copy       (IMAPSession *session,
 393                                  struct mailimap_set * set,
 394                                  const gchar *destfolder,
 395                                  struct mailimap_set ** source,
 396                                  struct mailimap_set ** dest);
 397 static gint imap_cmd_store      (IMAPSession    *session,
 398                                  IMAPFolderItem *item,
 399                                  struct mailimap_set * set,
 400                                  IMAPFlags flags,
 401                                  GSList *tags,
 402                                  int do_add);
 403 static gint imap_cmd_expunge    (IMAPSession    *session);
 404
 405 static void imap_path_separator_subst           (gchar          *str,
 406                                                  gchar           separator);
 407
 408 static gboolean imap_rename_folder_func         (GNode          *node,
 409                                                  gpointer        data);
 410 static gint imap_get_num_list                   (Folder         *folder,
 411                                                  FolderItem     *item,
 412                                                  GSList        **list,
 413                                                  gboolean       *old_uids_valid);
 414 static GSList *imap_get_msginfos                (Folder         *folder,
 415                                                  FolderItem     *item,
 416                                                  GSList         *msgnum_list);
 417 static MsgInfo *imap_get_msginfo                (Folder         *folder,
 418                                                  FolderItem     *item,
 419                                                  gint            num);
 420 static gboolean imap_scan_required              (Folder         *folder,
 421                                                  FolderItem     *item);
 422 static void imap_change_flags                   (Folder         *folder,
 423                                                  FolderItem     *item,
 424                                                  MsgInfo        *msginfo,
 425                                                  MsgPermFlags    newflags);
 426 static gint imap_get_flags                      (Folder         *folder,
 427                                                  FolderItem     *item,
 428                                                  MsgInfoList    *msglist,
 429                                                  GHashTable     *msgflags);
 430 static gchar *imap_folder_get_path              (Folder         *folder);
 431 static gchar *imap_item_get_path                (Folder         *folder,
 432                                                  FolderItem     *item);
 433 static MsgInfo *imap_parse_msg(const gchar *file, FolderItem *item);
 434
 435
 436 /* data types conversion libetpan <-> claws */
 437 static GSList * imap_list_from_lep(IMAPFolder * folder,
 438                                    clist * list, const gchar * real_path, gboolean all);
 439 static GSList * imap_get_lep_set_from_numlist(IMAPFolder *folder, MsgNumberList *numlist);
 440 static GSList * imap_get_lep_set_from_msglist(IMAPFolder *folder, MsgInfoList *msglist);
 441 static GSList * imap_uid_list_from_lep(clist * list, gint* length);
 442 static GSList * imap_uid_list_from_lep_tab(carray * list);
 443 static void imap_flags_hash_from_lep_uid_flags_tab(carray * list,
 444                                                    GHashTable * hash,
 445                                                    GHashTable *tags_hash);
 446 static MsgInfo *imap_envelope_from_lep(struct imap_fetch_env_info * info,
 447                                        FolderItem *item);
 448 static void imap_lep_set_free(GSList *seq_list);
 449 static struct mailimap_flag_list * imap_flag_to_lep(IMAPFolderItem *item, IMAPFlags flags, GSList *tags);
 450
 451 typedef struct _hashtable_data {
 452         GSList *msglist;
 453         IMAPFolderItem *item;
 454 } hashtable_data;
 455
 456 static FolderClass imap_class;
 457
 458 FolderClass *imap_get_class(void)
 459 {
 460         if (imap_class.idstr == NULL) {
 461                 imap_class.type = F_IMAP;
 462                 imap_class.idstr = "imap";
 463                 imap_class.uistr = "IMAP4";
 464                 imap_class.supports_server_search = TRUE;
 465
 466                 /* Folder functions */
 467                 imap_class.new_folder = imap_folder_new;
 468                 imap_class.destroy_folder = imap_folder_destroy;
 469                 imap_class.scan_tree = imap_scan_tree;
 470                 imap_class.create_tree = imap_create_tree;
 471
 472                 /* FolderItem functions */
 473                 imap_class.item_new = imap_folder_item_new;
 474                 imap_class.item_destroy = imap_folder_item_destroy;
 475                 imap_class.item_get_path = imap_item_get_path;
 476                 imap_class.create_folder = imap_create_folder;
 477                 imap_class.rename_folder = imap_rename_folder;
 478                 imap_class.remove_folder = imap_remove_folder;
 479                 imap_class.close = imap_close;
 480                 imap_class.get_num_list = imap_get_num_list;
 481                 imap_class.scan_required = imap_scan_required;
 482                 imap_class.set_xml = folder_set_xml;
 483                 imap_class.get_xml = folder_get_xml;
 484                 imap_class.item_set_xml = imap_item_set_xml;
 485                 imap_class.item_get_xml = imap_item_get_xml;
 486
 487                 /* Message functions */
 488                 imap_class.get_msginfo = imap_get_msginfo;
 489                 imap_class.get_msginfos = imap_get_msginfos;
 490                 imap_class.fetch_msg = imap_fetch_msg;
 491                 imap_class.fetch_msg_full = imap_fetch_msg_full;
 492                 imap_class.add_msg = imap_add_msg;
 493                 imap_class.add_msgs = imap_add_msgs;
 494                 imap_class.copy_msg = imap_copy_msg;
 495                 imap_class.copy_msgs = imap_copy_msgs;
 496                 imap_class.search_msgs = search_msgs;
 497                 imap_class.remove_msg = imap_remove_msg;
 498                 imap_class.remove_msgs = imap_remove_msgs;
 499                 imap_class.expunge = imap_expunge;
 500                 imap_class.remove_all_msg = imap_remove_all_msg;
 501                 imap_class.is_msg_changed = imap_is_msg_changed;
 502                 imap_class.change_flags = imap_change_flags;
 503                 imap_class.get_flags = imap_get_flags;
 504                 imap_class.set_batch = imap_set_batch;
 505                 imap_class.synchronise = imap_synchronise;
 506                 imap_class.remove_cached_msg = imap_remove_cached_msg;
 507                 imap_class.commit_tags = imap_commit_tags;
 508 #ifdef USE_PTREAD
 509                 pthread_mutex_init(&imap_mutex, NULL);
 510 #endif
 511         }
 512
 513         return &imap_class;
 514 }
 515
 516 static void imap_refresh_sensitivity (IMAPSession *session)
 517 {
 518         MainWindow *mainwin;
 519
 520         if (session->sens_update_block)
 521                 return;
 522         mainwin = mainwindow_get_mainwindow();
 523         if (mainwin) {
 524                 toolbar_main_set_sensitive(mainwin);
 525                 main_window_set_menu_sensitive(mainwin);
 526         }
 527 }
 528
 529 static void lock_session(IMAPSession *session)
 530 {
 531         if (session) {
 532                 debug_print("locking session %p (%d)\n", session, session->busy);
 533                 if (session->busy)
 534                         debug_print("         SESSION WAS LOCKED !!      \n");
 535                 session->busy = TRUE;
 536                 imap_refresh_sensitivity(session);
 537         } else {
 538                 debug_print("can't lock null session\n");
 539         }
 540 }
 541
 542 static void unlock_session(IMAPSession *session)
 543 {
 544         if (session) {
 545                 debug_print("unlocking session %p\n", session);
 546                 session->busy = FALSE;
 547                 imap_refresh_sensitivity(session);
 548         } else {
 549                 debug_print("can't unlock null session\n");
 550         }
 551 }
 552
 553 static gboolean imap_ping(gpointer data)
 554 {
 555         Session *session = (Session *)data;
 556         IMAPSession *imap_session = IMAP_SESSION(session);
 557         int r;
 558
 559         if (session->state != SESSION_READY)
 560                 return FALSE;
 561         if (imap_session->busy || !imap_session->authenticated)
 562                 return TRUE;
 563
 564         lock_session(imap_session);
 565         r = imap_cmd_noop(imap_session);
 566         unlock_session(imap_session);
 567
 568         return r == MAILIMAP_NO_ERROR;
 569 }
 570
 571 static void imap_disc_session_destroy(IMAPSession *session)
 572 {
 573         RemoteFolder *rfolder = NULL;
 574
 575         if (session == NULL)
 576                 return;
 577
 578         rfolder = REMOTE_FOLDER(IMAP_SESSION(session)->folder);
 579
 580         if (rfolder == NULL)
 581                 return;
 582         log_warning(LOG_PROTOCOL, _("IMAP4 connection broken\n"));
 583         SESSION(session)->state = SESSION_DISCONNECTED;
 584         SESSION(session)->sock = NULL;
 585 }
 586
 587 static void imap_safe_destroy(IMAPSession *session)
 588 {
 589         if (!session->busy)
 590                 session_destroy(SESSION(session));
 591         else
 592                 session->do_destroy = TRUE;
 593 }
 594
 595 static gboolean is_fatal(int libetpan_errcode)
 596 {
 597         switch(libetpan_errcode) {
 598         case MAILIMAP_ERROR_STREAM:
 599         case MAILIMAP_ERROR_PROTOCOL:
 600         case MAILIMAP_ERROR_PARSE:
 601         case MAILIMAP_ERROR_BAD_STATE:
 602                 return TRUE;
 603         default:
 604                 return FALSE;
 605         }
 606 }
 607
 608 static void imap_handle_error(Session *session, const gchar *server, int libetpan_errcode)
 609 {
 610         const gchar *session_server = (session ? session->server : NULL);
 611
 612         if (session_server == NULL)
 613                 session_server = server;
 614         if (session_server == NULL)
 615                 session_server = "(null)";
 616
 617         switch(libetpan_errcode) {
 618         case MAILIMAP_NO_ERROR:
 619                 return;
 620         case MAILIMAP_NO_ERROR_AUTHENTICATED:
 621                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("authenticated"), "\n", NULL), session_server);
 622                 break;
 623         case MAILIMAP_NO_ERROR_NON_AUTHENTICATED:
 624                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("not authenticated"), "\n", NULL), session_server);
 625                 break;
 626         case MAILIMAP_ERROR_BAD_STATE:
 627                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("bad state"), "\n", NULL), session_server);
 628                 break;
 629         case MAILIMAP_ERROR_STREAM:
 630                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("stream error"), "\n", NULL), session_server);
 631                 break;
 632         case MAILIMAP_ERROR_PARSE:
 633                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("parse error "
 634                                             "(very probably non-RFC compliance from the server)"), "\n", NULL), session_server);
 635                 break;
 636         case MAILIMAP_ERROR_CONNECTION_REFUSED:
 637                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("connection refused"), "\n", NULL), session_server);
 638                 break;
 639         case MAILIMAP_ERROR_MEMORY:
 640                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("memory error"), "\n", NULL), session_server);
 641                 break;
 642         case MAILIMAP_ERROR_FATAL:
 643                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("fatal error"), "\n", NULL), session_server);
 644                 break;
 645         case MAILIMAP_ERROR_PROTOCOL:
 646                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("protocol error "
 647                                             "(very probably non-RFC compliance from the server)"), "\n", NULL), session_server);
 648                 break;
 649         case MAILIMAP_ERROR_DONT_ACCEPT_CONNECTION:
 650                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("connection not accepted"), "\n", NULL), session_server);
 651                 break;
 652         case MAILIMAP_ERROR_APPEND:
 653                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("APPEND error"), "\n", NULL), session_server);
 654                 break;
 655         case MAILIMAP_ERROR_NOOP:
 656                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("NOOP error"), "\n", NULL), session_server);
 657                 break;
 658         case MAILIMAP_ERROR_LOGOUT:
 659                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("LOGOUT error"), "\n", NULL), session_server);
 660                 break;
 661         case MAILIMAP_ERROR_CAPABILITY:
 662                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("CAPABILITY error"), "\n", NULL), session_server);
 663                 break;
 664         case MAILIMAP_ERROR_CHECK:
 665                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("CHECK error"), "\n", NULL), session_server);
 666                 break;
 667         case MAILIMAP_ERROR_CLOSE:
 668                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("CLOSE error"), "\n", NULL), session_server);
 669                 break;
 670         case MAILIMAP_ERROR_EXPUNGE:
 671                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("EXPUNGE error"), "\n", NULL), session_server);
 672                 break;
 673         case MAILIMAP_ERROR_COPY:
 674                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("COPY error"), "\n", NULL), session_server);
 675                 break;
 676         case MAILIMAP_ERROR_UID_COPY:
 677                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("UID COPY error"), "\n", NULL), session_server);
 678                 break;
 679         case MAILIMAP_ERROR_CREATE:
 680                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("CREATE error"), "\n", NULL), session_server);
 681                 break;
 682         case MAILIMAP_ERROR_DELETE:
 683                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("DELETE error"), "\n", NULL), session_server);
 684                 break;
 685         case MAILIMAP_ERROR_EXAMINE:
 686                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("EXAMINE error"), "\n", NULL), session_server);
 687                 break;
 688         case MAILIMAP_ERROR_FETCH:
 689                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("FETCH error"), "\n", NULL), session_server);
 690                 break;
 691         case MAILIMAP_ERROR_UID_FETCH:
 692                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("UID FETCH error"), "\n", NULL), session_server);
 693                 break;
 694         case MAILIMAP_ERROR_LIST:
 695                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("LIST error"), "\n", NULL), session_server);
 696                 break;
 697         case MAILIMAP_ERROR_LOGIN:
 698                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("LOGIN error"), "\n", NULL), session_server);
 699                 break;
 700         case MAILIMAP_ERROR_LSUB:
 701                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("LSUB error"), "\n", NULL), session_server);
 702                 break;
 703         case MAILIMAP_ERROR_RENAME:
 704                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("RENAME error"), "\n", NULL), session_server);
 705                 break;
 706         case MAILIMAP_ERROR_SEARCH:
 707                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("SEARCH error"), "\n", NULL), session_server);
 708                 break;
 709         case MAILIMAP_ERROR_UID_SEARCH:
 710                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("UID SEARCH error"), "\n", NULL), session_server);
 711                 break;
 712         case MAILIMAP_ERROR_SELECT:
 713                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("SELECT error"), "\n", NULL), session_server);
 714                 break;
 715         case MAILIMAP_ERROR_STATUS:
 716                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("STATUS error"), "\n", NULL), session_server);
 717                 break;
 718         case MAILIMAP_ERROR_STORE:
 719                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("STORE error"), "\n", NULL), session_server);
 720                 break;
 721         case MAILIMAP_ERROR_UID_STORE:
 722                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("UID STORE error"), "\n", NULL), session_server);
 723                 break;
 724         case MAILIMAP_ERROR_SUBSCRIBE:
 725                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("SUBSCRIBE error"), "\n", NULL), session_server);
 726                 break;
 727         case MAILIMAP_ERROR_UNSUBSCRIBE:
 728                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("UNSUBSCRIBE error"), "\n", NULL), session_server);
 729                 break;
 730         case MAILIMAP_ERROR_STARTTLS:
 731                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("STARTTLS error"), "\n", NULL), session_server);
 732                 break;
 733         case MAILIMAP_ERROR_INVAL:
 734                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("INVAL error"), "\n", NULL), session_server);
 735                 break;
 736         case MAILIMAP_ERROR_EXTENSION:
 737                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("EXTENSION error"), "\n", NULL), session_server);
 738                 break;
 739         case MAILIMAP_ERROR_SASL:
 740                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("SASL error"), "\n", NULL), session_server);
 741                 break;
 742 #ifdef USE_GNUTLS
 743         case MAILIMAP_ERROR_SSL:
 744                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("SSL error"), "\n", NULL), session_server);
 745                 break;
 746 #endif
 747         default:
 748                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("Unknown error [%d]"), "\n", NULL),
 749                         session_server, libetpan_errcode);
 750                 break;
 751         }
 752
 753         if (session && is_fatal(libetpan_errcode)) {
 754                 imap_disc_session_destroy(IMAP_SESSION(session));
 755         } else if (session && !is_fatal(libetpan_errcode)) {
 756                 if (IMAP_SESSION(session)->busy)
 757                         unlock_session(IMAP_SESSION(session));
 758         }
 759 }
 760
 761 static Folder *imap_folder_new(const gchar *name, const gchar *path)
 762 {
 763         Folder *folder;
 764
 765         folder = (Folder *)g_new0(IMAPFolder, 1);
 766         folder->klass = &imap_class;
 767         imap_folder_init(folder, name, path);
 768
 769         return folder;
 770 }
 771
 772 static void imap_folder_destroy(Folder *folder)
 773 {
 774         while (imap_folder_get_refcnt(folder) > 0)
 775                 gtk_main_iteration();
 776
 777         g_free(IMAP_FOLDER(folder)->search_charset);
 778
 779         folder_remote_folder_destroy(REMOTE_FOLDER(folder));
 780         imap_done(folder);
 781 }
 782
 783 static void imap_folder_init(Folder *folder, const gchar *name,
 784                              const gchar *path)
 785 {
 786         folder_remote_folder_init((Folder *)folder, name, path);
 787         IMAP_FOLDER(folder)->max_set_size = IMAP_SET_MAX_COUNT;
 788         IMAP_FOLDER(folder)->search_charset_supported = TRUE;
 789         IMAP_FOLDER(folder)->search_charset = g_strdup(conv_get_locale_charset_str_no_utf8());
 790 }
 791
 792 static FolderItem *imap_folder_item_new(Folder *folder)
 793 {
 794         IMAPFolderItem *item;
 795
 796         item = g_new0(IMAPFolderItem, 1);
 797         item->lastuid = 0;
 798         item->uid_next = 0;
 799         item->uid_list = NULL;
 800
 801         return (FolderItem *)item;
 802 }
 803
 804 static void imap_folder_item_destroy(Folder *folder, FolderItem *_item)
 805 {
 806         IMAPFolderItem *item = (IMAPFolderItem *)_item;
 807
 808         g_return_if_fail(item != NULL);
 809         g_slist_free(item->uid_list);
 810
 811         g_free(_item);
 812 }
 813
 814 static gboolean imap_reset_uid_lists_func(GNode *node, gpointer data)
 815 {
 816         IMAPFolderItem *item = (IMAPFolderItem *)node->data;
 817
 818         item->lastuid = 0;
 819         g_slist_free(item->uid_list);
 820         item->uid_list = NULL;
 821
 822         return FALSE;
 823 }
 824
 825 static void imap_reset_uid_lists(Folder *folder)
 826 {
 827         if(folder->node == NULL)
 828                 return;
 829
 830         /* Destroy all uid lists and rest last uid */
 831         g_node_traverse(folder->node, G_IN_ORDER, G_TRAVERSE_ALL, -1, imap_reset_uid_lists_func, NULL);
 832 }
 833
 834 static int imap_get_capabilities(IMAPSession *session)
 835 {
 836         struct mailimap_capability_data *capabilities = NULL;
 837         clistiter *cur;
 838         int result;
 839
 840         if (session->capability != NULL)
 841                 return MAILIMAP_NO_ERROR;
 842
 843         result = imap_threaded_capability(session->folder, &capabilities);
 844
 845         if (result != MAILIMAP_NO_ERROR) {
 846                 return result;
 847         }
 848
 849         if (capabilities == NULL || capabilities->cap_list == NULL) {
 850                 return MAILIMAP_NO_ERROR;
 851         }
 852
 853         for(cur = clist_begin(capabilities->cap_list) ; cur != NULL ;
 854             cur = clist_next(cur)) {
 855                 struct mailimap_capability * cap =
 856                         clist_content(cur);
 857                 if (!cap || cap->cap_data.cap_name == NULL)
 858                         continue;
 859                 session->capability = g_slist_append
 860                                 (session->capability,
 861                                  g_strdup(cap->cap_data.cap_name));
 862                 debug_print("got capa %s\n", cap->cap_data.cap_name);
 863         }
 864         mailimap_capability_data_free(capabilities);
 865         return MAILIMAP_NO_ERROR;
 866 }
 867
 868 static gboolean imap_has_capability(IMAPSession *session, const gchar *cap)
 869 {
 870         GSList *cur;
 871         for (cur = session->capability; cur; cur = cur->next) {
 872                 if (!g_ascii_strcasecmp(cur->data, cap))
 873                         return TRUE;
 874         }
 875         return FALSE;
 876 }
 877
 878 static gint imap_auth(IMAPSession *session, const gchar *user, const gchar *pass,
 879                       IMAPAuthType type)
 880 {
 881         gint ok = MAILIMAP_ERROR_LOGIN;
 882         static time_t last_login_err = 0;
 883         gchar *ext_info = "";
 884         int r;
 885         gchar *server = NULL;
 886         if ((r = imap_get_capabilities(session)) != MAILIMAP_NO_ERROR) {
 887                 imap_handle_error(SESSION(session), NULL, r);
 888                 return r;
 889         }
 890         server = g_strdup(SESSION(session)->server);
 891         switch(type) {
 892         case IMAP_AUTH_ANON:
 893                 ok = imap_cmd_login(session, user, pass, "ANONYMOUS");
 894                 break;
 895         case IMAP_AUTH_CRAM_MD5:
 896                 ok = imap_cmd_login(session, user, pass, "CRAM-MD5");
 897                 break;
 898         case IMAP_AUTH_DIGEST_MD5:
 899                 ok = imap_cmd_login(session, user, pass, "DIGEST-MD5");
 900                 break;
 901         case IMAP_AUTH_SCRAM_SHA1:
 902                 ok = imap_cmd_login(session, user, pass, "SCRAM-SHA-1");
 903                 break;
 904         case IMAP_AUTH_PLAIN:
 905                 ok = imap_cmd_login(session, user, pass, "PLAIN");
 906                 break;
 907         case IMAP_AUTH_LOGIN:
 908                 ok = imap_cmd_login(session, user, pass, "LOGIN");
 909                 break;
 910         case IMAP_AUTH_PLAINTEXT:
 911                 ok = imap_cmd_login(session, user, pass, "plaintext");
 912                 break;
 913         case IMAP_AUTH_GSSAPI:
 914                 ok = imap_cmd_login(session, user, pass, "GSSAPI");
 915                 break;
 916         default:
 917                 debug_print("capabilities:\n"
 918                                 "\t ANONYMOUS %d\n"
 919                                 "\t CRAM-MD5 %d\n"
 920                                 "\t DIGEST-MD5 %d\n"
 921                                 "\t SCRAM-SHA-1 %d\n"
 922                                 "\t PLAIN %d\n"
 923                                 "\t LOGIN %d\n"
 924                                 "\t GSSAPI %d\n",
 925                         imap_has_capability(session, "ANONYMOUS"),
 926                         imap_has_capability(session, "CRAM-MD5"),
 927                         imap_has_capability(session, "DIGEST-MD5"),
 928                         imap_has_capability(session, "SCRAM-SHA-1"),
 929                         imap_has_capability(session, "PLAIN"),
 930                         imap_has_capability(session, "LOGIN"),
 931                         imap_has_capability(session, "GSSAPI"));
 932                 if (imap_has_capability(session, "CRAM-MD5"))
 933                         ok = imap_cmd_login(session, user, pass, "CRAM-MD5");
 934                 if (ok == MAILIMAP_ERROR_LOGIN && imap_has_capability(session, "DIGEST-MD5"))
 935                         ok = imap_cmd_login(session, user, pass, "DIGEST-MD5");
 936                 if (ok == MAILIMAP_ERROR_LOGIN && imap_has_capability(session, "SCRAM-SHA-1"))
 937                         ok = imap_cmd_login(session, user, pass, "SCRAM-SHA-1");
 938                 if (ok == MAILIMAP_ERROR_LOGIN && imap_has_capability(session, "PLAIN"))
 939                         ok = imap_cmd_login(session, user, pass, "PLAIN");
 940                 if (ok == MAILIMAP_ERROR_LOGIN && imap_has_capability(session, "LOGIN"))
 941                         ok = imap_cmd_login(session, user, pass, "LOGIN");
 942                 if (ok == MAILIMAP_ERROR_LOGIN && imap_has_capability(session, "GSSAPI"))
 943                         ok = imap_cmd_login(session, user, pass, "GSSAPI");
 944                 if (ok == MAILIMAP_ERROR_LOGIN) /* we always try plaintext login before giving up */
 945                         ok = imap_cmd_login(session, user, pass, "plaintext");
 946         }
 947
 948         if (ok == MAILIMAP_NO_ERROR)
 949                 session->authenticated = TRUE;
 950         else {
 951                 if (type == IMAP_AUTH_CRAM_MD5) {
 952                         ext_info = _("\n\nCRAM-MD5 logins only work if libetpan has been "
 953                                      "compiled with SASL support and the "
 954                                      "CRAM-MD5 SASL plugin is installed.");
 955                 }
 956
 957                 if (type == IMAP_AUTH_DIGEST_MD5) {
 958                         ext_info = _("\n\nDIGEST-MD5 logins only work if libetpan has been "
 959                                      "compiled with SASL support and the "
 960                                      "DIGEST-MD5 SASL plugin is installed.");
 961                 }
 962
 963                 if (type == IMAP_AUTH_SCRAM_SHA1) {
 964                         ext_info = _("\n\nSCRAM-SHA-1 logins only work if libetpan has been "
 965                                      "compiled with SASL support and the "
 966                                      "SCRAM SASL plugin is installed.");
 967                 }
 968
 969                 if (type == IMAP_AUTH_PLAIN) {
 970                         ext_info = _("\n\nPLAIN logins only work if libetpan has been "
 971                                      "compiled with SASL support and the "
 972                                      "PLAIN SASL plugin is installed.");
 973                 }
 974
 975                 if (type == IMAP_AUTH_LOGIN) {
 976                         ext_info = _("\n\nLOGIN logins only work if libetpan has been "
 977                                      "compiled with SASL support and the "
 978                                      "LOGIN SASL plugin is installed.");
 979                 }
 980
 981                 if (time(NULL) - last_login_err > 10) {
 982                         if (!prefs_common.no_recv_err_panel) {
 983                                 alertpanel_error_log(_("Connection to %s failed: "
 984                                         "login refused.%s"),
 985                                         server, ext_info);
 986                         } else {
 987                                 log_error(LOG_PROTOCOL, _("Connection to %s failed: "
 988                                         "login refused.%s\n"),
 989                                         server, ext_info);
 990                         }
 991                 }
 992                 last_login_err = time(NULL);
 993         }
 994         g_free(server);
 995         return ok;
 996 }
 997
 998 static IMAPSession *imap_reconnect_if_possible(Folder *folder, IMAPSession *session)
 999 {
1000         RemoteFolder *rfolder = REMOTE_FOLDER(folder);
1001         /* Check if this is the first try to establish a
1002            connection, if yes we don't try to reconnect */
1003         debug_print("reconnecting\n");
1004         if (rfolder->session == NULL) {
1005                 log_warning(LOG_PROTOCOL, _("Connecting to %s failed"),
1006                             folder->account->recv_server);
1007                 SESSION(session)->sock = NULL;
1008                 imap_safe_destroy(session);
1009                 session = NULL;
1010         } else {
1011                 rfolder->session = NULL;
1012                 log_warning(LOG_PROTOCOL, _("IMAP4 connection to %s has been"
1013                             " disconnected. Reconnecting...\n"),
1014                             folder->account->recv_server);
1015                 statusbar_print_all(_("IMAP4 connection to %s has been"
1016                             " disconnected. Reconnecting...\n"),
1017                             folder->account->recv_server);
1018                 SESSION(session)->state = SESSION_DISCONNECTED;
1019                 SESSION(session)->sock = NULL;
1020                 imap_safe_destroy(session);
1021                 /* Clear folders session to make imap_session_get create
1022                    a new session, because of rfolder->session == NULL
1023                    it will not try to reconnect again and so avoid an
1024                    endless loop */
1025                 debug_print("getting session...\n");
1026                 session = imap_session_get(folder);
1027                 rfolder->session = SESSION(session);
1028                 statusbar_pop_all();
1029         }
1030         return session;
1031 }
1032
1033 static IMAPSession *imap_session_get(Folder *folder)
1034 {
1035         RemoteFolder *rfolder = REMOTE_FOLDER(folder);
1036         IMAPSession *session = NULL;
1037         gint r = MAILIMAP_NO_ERROR;
1038
1039         g_return_val_if_fail(folder != NULL, NULL);
1040         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, NULL);
1041         g_return_val_if_fail(folder->account != NULL, NULL);
1042
1043         if (prefs_common.work_offline &&
1044             !inc_offline_should_override(FALSE,
1045                 _("Claws Mail needs network access in order "
1046                   "to access the IMAP server."))) {
1047                 return NULL;
1048         }
1049
1050         /* check for deferred destroy */
1051         if (rfolder->session != NULL) {
1052                 session = IMAP_SESSION(rfolder->session);
1053                 if (!session->busy && session->do_destroy) {
1054                         rfolder->session = NULL;
1055                         imap_safe_destroy(session);
1056                         session = NULL;
1057                 }
1058         }
1059
1060         /* Make sure we have a session */
1061         if (rfolder->session != NULL && rfolder->session->state != SESSION_DISCONNECTED) {
1062                 session = IMAP_SESSION(rfolder->session);
1063         } else if (rfolder->session != NULL && rfolder->session->state == SESSION_DISCONNECTED) {
1064                 imap_safe_destroy(IMAP_SESSION(rfolder->session));
1065                 rfolder->session = NULL;
1066                 goto new_conn;
1067         } else if (rfolder->connecting) {
1068                 debug_print("already connecting\n");
1069                 return NULL;
1070         } else {
1071 new_conn:
1072                 imap_reset_uid_lists(folder);
1073                 if (time(NULL) - rfolder->last_failure <= 2)
1074                         return NULL;
1075                 rfolder->connecting = TRUE;
1076                 session = imap_session_new(folder, folder->account);
1077         }
1078         if(session == NULL) {
1079                 rfolder->last_failure = time(NULL);
1080                 rfolder->connecting = FALSE;
1081                 return NULL;
1082         }
1083
1084         /* Make sure session is authenticated */
1085         if (!IMAP_SESSION(session)->authenticated)
1086                 r = imap_session_authenticate(IMAP_SESSION(session), folder->account);
1087
1088         if (r != MAILIMAP_NO_ERROR || (!is_fatal(r) && !IMAP_SESSION(session)->authenticated)) {
1089                 rfolder->session = NULL;
1090                 if (!is_fatal(r)) {
1091                         imap_threaded_disconnect(session->folder);
1092                 }
1093                 SESSION(session)->state = SESSION_DISCONNECTED;
1094                 SESSION(session)->sock = NULL;
1095                 imap_safe_destroy(session);
1096                 rfolder->last_failure = time(NULL);
1097                 rfolder->connecting = FALSE;
1098                 return NULL;
1099         }
1100
1101         /* I think the point of this code is to avoid sending a
1102          * keepalive if we've used the session recently and therefore
1103          * think it's still alive.  Unfortunately, most of the code
1104          * does not yet check for errors on the socket, and so if the
1105          * connection drops we don't notice until the timeout expires.
1106          * A better solution than sending a NOOP every time would be
1107          * for every command to be prepared to retry until it is
1108          * successfully sent. -- mbp */
1109         if ((time(NULL) - SESSION(session)->last_access_time > SESSION_TIMEOUT_INTERVAL) || session->cancelled) {
1110                 /* verify that the session is still alive */
1111                 r = imap_cmd_noop(session);
1112
1113                 if (r != MAILIMAP_NO_ERROR) {
1114                         debug_print("disconnected!\n");
1115                         if (!is_fatal(r))
1116                                 session = imap_reconnect_if_possible(folder, session);
1117                         else {
1118                                 rfolder->session = NULL;
1119                                 rfolder->connecting = FALSE;
1120                                 SESSION(session)->state = SESSION_DISCONNECTED;
1121                                 SESSION(session)->sock = NULL;
1122                                 imap_safe_destroy(session);
1123                                 session = imap_session_get(folder);
1124                         }
1125                 }
1126                 if (session)
1127                         session->cancelled = FALSE;
1128         }
1129
1130         rfolder->session = SESSION(session);
1131         rfolder->connecting = FALSE;
1132
1133         return IMAP_SESSION(session);
1134 }
1135
1136 static IMAPSession *imap_session_new(Folder * folder,
1137                                      const PrefsAccount *account)
1138 {
1139         IMAPSession *session;
1140         gushort port;
1141         int r;
1142         int authenticated = FALSE;
1143         gchar *buf;
1144
1145 #ifdef USE_GNUTLS
1146         /* FIXME: IMAP over SSL only... */
1147         SSLType ssl_type;
1148
1149         port = account->set_imapport ? account->imapport
1150                 : account->ssl_imap == SSL_TUNNEL ? IMAPS_PORT : IMAP4_PORT;
1151         ssl_type = account->ssl_imap;
1152 #else
1153         if (account->ssl_imap != SSL_NONE) {
1154                 if (alertpanel_full(_("Insecure connection"),
1155                         _("This connection is configured to be secured "
1156                           "using SSL, but SSL is not available in this "
1157                           "build of Claws Mail. \n\n"
1158                           "Do you want to continue connecting to this "
1159                           "server? The communication would not be "
1160                           "secure."),
1161                           GTK_STOCK_CANCEL, _("Con_tinue connecting"),
1162                           NULL, FALSE, NULL, ALERT_WARNING,
1163                           G_ALERTDEFAULT) != G_ALERTALTERNATE)
1164                         return NULL;
1165         }
1166         port = account->set_imapport ? account->imapport
1167                 : IMAP4_PORT;
1168 #endif
1169
1170         imap_init(folder);
1171         buf = g_strdup_printf(_("Account '%s': Connecting to IMAP4 server: %s:%d..."),
1172                                 folder->account->account_name, folder->account->recv_server,
1173                                 port);
1174         statuswindow_print_all("%s", buf);
1175         log_message(LOG_PROTOCOL, "%s\n", buf);
1176         g_free(buf);
1177
1178 #ifndef G_OS_WIN32
1179         if (account->set_tunnelcmd) {
1180                 r = imap_threaded_connect_cmd(folder,
1181                                               account->tunnelcmd,
1182                                               account->recv_server,
1183                                               port);
1184         }
1185         else
1186 #endif
1187         {
1188 #ifdef USE_GNUTLS
1189                 if (ssl_type == SSL_TUNNEL) {
1190                         r = imap_threaded_connect_ssl(folder,
1191                                                       account->recv_server,
1192                                                       port);
1193                 }
1194                 else
1195 #endif
1196                 {
1197                         r = imap_threaded_connect(folder,
1198                                                   account->recv_server,
1199                                                   port);
1200                 }
1201         }
1202
1203         statuswindow_pop_all();
1204         if (r == MAILIMAP_NO_ERROR_AUTHENTICATED) {
1205                 authenticated = TRUE;
1206         }
1207         else if (r == MAILIMAP_NO_ERROR_NON_AUTHENTICATED) {
1208                 authenticated = FALSE;
1209         }
1210         else {
1211 #ifdef USE_GNUTLS
1212                 if (r == MAILIMAP_ERROR_SSL)
1213                         log_error(LOG_PROTOCOL, _("SSL handshake failed\n"));
1214                 else
1215 #endif
1216                         imap_handle_error(NULL, account->recv_server, r);
1217
1218                 if(!prefs_common.no_recv_err_panel) {
1219                         alertpanel_error_log(_("Can't connect to IMAP4 server: %s:%d"),
1220                                          account->recv_server, port);
1221                 } else {
1222                         log_error(LOG_PROTOCOL, _("Can't connect to IMAP4 server: %s:%d\n"),
1223                                          account->recv_server, port);
1224                 }
1225
1226                 return NULL;
1227         }
1228
1229         session = g_new0(IMAPSession, 1);
1230         session_init(SESSION(session), account, FALSE);
1231         SESSION(session)->type             = SESSION_IMAP;
1232         SESSION(session)->server           = g_strdup(account->recv_server);
1233         SESSION(session)->port             = port;
1234         SESSION(session)->sock             = NULL;
1235
1236         SESSION(session)->destroy          = imap_session_destroy;
1237
1238         session->capability = NULL;
1239
1240         session->authenticated = authenticated;
1241         session->mbox = NULL;
1242         session->exists = 0;
1243         session->recent = 0;
1244         session->expunge = 0;
1245         session->cmd_count = 0;
1246         session->folder = folder;
1247         IMAP_FOLDER(session->folder)->last_seen_separator = 0;
1248
1249 #ifdef USE_GNUTLS
1250         if (account->ssl_imap == SSL_STARTTLS) {
1251                 gint ok;
1252
1253                 ok = imap_cmd_starttls(session);
1254                 if (ok != MAILIMAP_NO_ERROR) {
1255                         log_warning(LOG_PROTOCOL, _("Can't start TLS session.\n"));
1256                         if (!is_fatal(ok)) {
1257                                 SESSION(session)->sock = NULL;
1258                                 imap_safe_destroy(session);
1259                         }
1260                         return NULL;
1261                 }
1262
1263                 imap_free_capabilities(session);
1264                 session->authenticated = FALSE;
1265                 session->uidplus = FALSE;
1266                 session->cmd_count = 1;
1267         }
1268 #endif
1269         log_message(LOG_PROTOCOL, "IMAP connection is %s-authenticated\n",
1270                     (session->authenticated) ? "pre" : "un");
1271
1272         session_register_ping(SESSION(session), imap_ping);
1273
1274         return session;
1275 }
1276
1277 static gint imap_session_authenticate(IMAPSession *session,
1278                                       PrefsAccount *account)
1279 {
1280         gchar *pass, *acc_pass;
1281         gboolean failed = FALSE;
1282         gint ok = MAILIMAP_NO_ERROR;
1283         g_return_val_if_fail(account->userid != NULL, MAILIMAP_ERROR_BAD_STATE);
1284
1285         if (password_get(account->userid, account->recv_server, "imap",
1286                          SESSION(session)->port, &pass)) {
1287                 Xstrdup_a(acc_pass, pass, {g_free(pass); return MAILIMAP_NO_ERROR;});
1288                 g_free(pass);
1289         } else {
1290                 acc_pass = passwd_store_get_account(account->account_id,
1291                                 PWS_ACCOUNT_RECV);
1292         }
1293 try_again:
1294         pass = acc_pass;
1295         if (!pass && account->imap_auth_type != IMAP_AUTH_ANON && account->imap_auth_type != IMAP_AUTH_GSSAPI) {
1296                 gchar *tmp_pass;
1297                 tmp_pass = input_dialog_query_password_keep(account->recv_server,
1298                                                             account->userid,
1299                                                             &(account->session_passwd));
1300                 if (!tmp_pass) {
1301                         return MAILIMAP_NO_ERROR;
1302                 }
1303                 Xstrdup_a(pass, tmp_pass, {g_free(tmp_pass); return MAILIMAP_NO_ERROR;});
1304                 g_free(tmp_pass);
1305         } else if (account->imap_auth_type == IMAP_AUTH_ANON || account->imap_auth_type == IMAP_AUTH_GSSAPI) {
1306                 pass = "";
1307         }
1308         if ((ok = imap_auth(session, account->userid, pass, account->imap_auth_type)) != MAILIMAP_NO_ERROR) {
1309
1310                 if (!failed && !is_fatal(ok)) {
1311                         if (acc_pass != NULL) {
1312                                 memset(acc_pass, 0, strlen(acc_pass));
1313                                 g_free(acc_pass);
1314                                 acc_pass = NULL;
1315                         }
1316                         failed = TRUE;
1317                         if (account->session_passwd != NULL) {
1318                                 g_free(account->session_passwd);
1319                                 account->session_passwd = NULL;
1320                         }
1321                         goto try_again;
1322                 } else {
1323                         if (prefs_common.no_recv_err_panel) {
1324                                 log_error(LOG_PROTOCOL, _("Couldn't login to IMAP server %s.\n"), account->recv_server);
1325                                 mainwindow_show_error();
1326                         } else
1327                                 alertpanel_error_log(_("Couldn't login to IMAP server %s."), account->recv_server);
1328                 }
1329
1330                 if (acc_pass != NULL) {
1331                         g_free(acc_pass);
1332                         memset(acc_pass, 0, strlen(acc_pass));
1333                 }
1334
1335                 return ok;
1336         }
1337
1338         if (acc_pass) {
1339                 memset(acc_pass, 0, strlen(acc_pass));
1340                 g_free(acc_pass);
1341         }
1342         statuswindow_pop_all();
1343         session->authenticated = TRUE;
1344         return MAILIMAP_NO_ERROR;
1345 }
1346
1347 static void imap_session_destroy(Session *session)
1348 {
1349         if (session->state != SESSION_DISCONNECTED)
1350                 imap_threaded_disconnect(IMAP_SESSION(session)->folder);
1351
1352         imap_free_capabilities(IMAP_SESSION(session));
1353         g_free(IMAP_SESSION(session)->mbox);
1354 }
1355
1356 static gchar *imap_fetch_msg(Folder *folder, FolderItem *item, gint uid)
1357 {
1358         return imap_fetch_msg_full(folder, item, uid, TRUE, TRUE);
1359 }
1360
1361 static guint get_file_size_with_crs(const gchar *filename)
1362 {
1363         FILE *fp = NULL;
1364         guint cnt = 0;
1365         gchar buf[4096];
1366
1367         if (filename == NULL)
1368                 return -1;
1369
1370         fp = g_fopen(filename, "rb");
1371         if (!fp)
1372                 return -1;
1373
1374         while (fgets(buf, sizeof (buf), fp) != NULL) {
1375                 cnt += strlen(buf);
1376                 if (!strstr(buf, "\r\n") && strstr(buf, "\n"))
1377                         cnt++;
1378         }
1379
1380         fclose(fp);
1381         return cnt;
1382 }
1383
1384 static gchar *imap_get_cached_filename(FolderItem *item, guint msgnum)
1385 {
1386         gchar *path, *filename;
1387
1388         cm_return_val_if_fail(item != NULL, NULL);
1389
1390         path = folder_item_get_path(item);
1391
1392         if (!is_dir_exist(path)) {
1393                 g_free(path);
1394                 return NULL;
1395         }
1396
1397         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(msgnum), NULL);
1398
1399         if (is_dir_exist(filename)) {
1400                 g_free(filename);
1401                 filename = g_strconcat(path, G_DIR_SEPARATOR_S, ".", itos(msgnum), NULL);
1402         }
1403         g_free(path);
1404
1405         return filename;
1406 }
1407
1408 static void imap_remove_cached_msg(Folder *folder, FolderItem *item, MsgInfo *msginfo)
1409 {
1410         gchar *filename;
1411
1412         filename = imap_get_cached_filename(item, msginfo->msgnum);
1413
1414         cm_return_if_fail(filename != NULL);
1415
1416         if (is_file_exist(filename)) {
1417                 claws_unlink(filename);
1418         }
1419         g_free(filename);
1420 }
1421
1422 typedef struct _TagsData {
1423         gchar *str;
1424         GSList *msglist;
1425         IMAPFolderItem *item;
1426 } TagsData;
1427
1428 static void imap_commit_tags(FolderItem *item, MsgInfo *msginfo, GSList *tags_set, GSList *tags_unset)
1429 {
1430         IMAPSession *session;
1431         gint ok, can_create_tags;
1432         Folder *folder = NULL;
1433         TagsData *ht_data = NULL;
1434         GSList *cur;
1435
1436         g_return_if_fail(item != NULL);
1437         g_return_if_fail(msginfo != NULL);
1438
1439         folder = item->folder;
1440         debug_print("getting session...\n");
1441         session = imap_session_get(folder);
1442
1443         if (!session) {
1444                 debug_print("can't get session\n");
1445                 return;
1446         }
1447
1448         ok = imap_select(session, IMAP_FOLDER(folder), item,
1449                          NULL, NULL, NULL, NULL, &can_create_tags, FALSE);
1450
1451         if (ok != MAILIMAP_NO_ERROR) {
1452                 return;
1453         }
1454
1455
1456         if (IMAP_FOLDER_ITEM(item)->can_create_flags != ITEM_CAN_CREATE_FLAGS)
1457                 return;
1458
1459         if (IMAP_FOLDER_ITEM(item)->batching) {
1460                 /* instead of performing an UID STORE command for each message change,
1461                  * as a lot of them can change "together", we just fill in hashtables
1462                  * and defer the treatment so that we're able to send only one
1463                  * command.
1464                  */
1465                 debug_print("IMAP batch mode on, deferring tags change\n");
1466                 for (cur = tags_set; cur; cur = cur->next) {
1467                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1468                         if (cur_tag) {
1469                                 ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->tags_set_table,
1470                                         GINT_TO_POINTER(cur_tag));
1471                                 if (ht_data == NULL) {
1472                                         ht_data = g_new0(TagsData, 1);
1473                                         ht_data->str = g_strdup(tags_get_tag(cur_tag));
1474                                         ht_data->item = IMAP_FOLDER_ITEM(item);
1475                                         g_hash_table_insert(IMAP_FOLDER_ITEM(item)->tags_set_table,
1476                                                 GINT_TO_POINTER(cur_tag), ht_data);
1477                                 }
1478                                 ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
1479                         }
1480                 }
1481                 for (cur = tags_unset; cur; cur = cur->next) {
1482                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1483                         if (cur_tag) {
1484                                 ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->tags_unset_table,
1485                                         GINT_TO_POINTER(cur_tag));
1486                                 if (ht_data == NULL) {
1487                                         ht_data = g_new0(TagsData, 1);
1488                                         ht_data->str = g_strdup(tags_get_tag(cur_tag));
1489                                         ht_data->item = IMAP_FOLDER_ITEM(item);
1490                                         g_hash_table_insert(IMAP_FOLDER_ITEM(item)->tags_unset_table,
1491                                                 GINT_TO_POINTER(cur_tag), ht_data);
1492                                 }
1493                                 ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
1494                         }
1495                 }
1496         } else {
1497                 GSList *list_set = NULL;
1498                 GSList *list_unset = NULL;
1499                 GSList numlist;
1500
1501                 numlist.data = GINT_TO_POINTER(msginfo->msgnum);
1502                 numlist.next = NULL;
1503
1504                 debug_print("IMAP changing tags NOW\n");
1505                 for (cur = tags_set; cur; cur = cur->next) {
1506                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1507                         const gchar *str = tags_get_tag(cur_tag);
1508                         if (IS_NOT_RESERVED_TAG(str))
1509                                 list_set = g_slist_prepend(list_set, g_strdup(str));
1510                 }
1511                 if (list_set) {
1512                         ok = imap_set_message_flags(session,
1513                                 IMAP_FOLDER_ITEM(item), &numlist, 0, list_set, TRUE);
1514                         slist_free_strings_full(list_set);
1515                         if (ok != MAILIMAP_NO_ERROR) {
1516                                 return;
1517                         }
1518                 }
1519
1520                 for (cur = tags_unset; cur; cur = cur->next) {
1521                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1522                         const gchar *str = tags_get_tag(cur_tag);
1523                         if (IS_NOT_RESERVED_TAG(str))
1524                                 list_unset = g_slist_prepend(list_unset, g_strdup(str));
1525                 }
1526                 if (list_unset) {
1527                         ok = imap_set_message_flags(session,
1528                                 IMAP_FOLDER_ITEM(item), &numlist, 0, list_unset, FALSE);
1529                         slist_free_strings_full(list_unset);
1530                         if (ok != MAILIMAP_NO_ERROR) {
1531                                 return;
1532                         }
1533                 }
1534         }
1535 }
1536
1537 static gchar *imap_fetch_msg_full(Folder *folder, FolderItem *item, gint uid,
1538                                   gboolean headers, gboolean body)
1539 {
1540         gchar *path, *filename;
1541         IMAPSession *session;
1542         gint ok;
1543
1544         g_return_val_if_fail(folder != NULL, NULL);
1545         g_return_val_if_fail(item != NULL, NULL);
1546
1547         if (uid == 0)
1548                 return NULL;
1549
1550         path = folder_item_get_path(item);
1551         if (!is_dir_exist(path)) {
1552                 if(is_file_exist(path))
1553                         claws_unlink(path);
1554                 make_dir_hier(path);
1555         }
1556         g_free(path);
1557
1558         filename = imap_get_cached_filename(item, uid);
1559         debug_print("trying to fetch cached %s\n", filename);
1560
1561         if (is_file_exist(filename)) {
1562                 /* see whether the local file represents the whole message
1563                  * or not. As the IMAP server reports size with \r chars,
1564                  * we have to update the local file (UNIX \n only) size */
1565                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1566                 guint have_size = -1;
1567
1568                 if (cached)
1569                         debug_print("message %d has been already %scached.\n", uid,
1570                                 MSG_IS_FULLY_CACHED(cached->flags) ? "fully ":"");
1571
1572                 if (!cached || !MSG_IS_FULLY_CACHED(cached->flags)) {
1573                         have_size = get_file_size_with_crs(filename);
1574                         if (cached && (cached->size <= have_size || !body)) {
1575                                 ok = file_strip_crs(filename);
1576                                 if (ok == 0 && cached && cached->size <= have_size) {
1577                                         /* we have it all and stripped */
1578                                         debug_print("...fully cached in fact (%u/%zd); setting flag.\n",
1579                                                         have_size, cached->size);
1580                                         procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1581                                 }
1582                                 procmsg_msginfo_free(&cached);
1583                                 return filename;
1584                         } else if (!cached && time(NULL) - get_file_mtime(filename) < 60) {
1585                                 debug_print("message not cached and file recent, considering file complete\n");
1586                                 ok = file_strip_crs(filename);
1587                                 if (ok == 0)
1588                                         return filename;
1589                         } else {
1590                                 procmsg_msginfo_free(&cached);
1591                         }
1592                 }
1593                 if (cached && MSG_IS_FULLY_CACHED(cached->flags)) {
1594                         procmsg_msginfo_free(&cached);
1595                         return filename;
1596                 }
1597         } else {
1598                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1599                 if (cached) {
1600                         procmsg_msginfo_unset_flags(cached, MSG_FULLY_CACHED, 0);
1601                         procmsg_msginfo_free(&cached);
1602                 }
1603         }
1604
1605         debug_print("getting session...\n");
1606         session = imap_session_get(folder);
1607
1608         if (!session) {
1609                 g_free(filename);
1610                 return NULL;
1611         }
1612         session_set_access_time(SESSION(session));
1613         lock_session(session); /* unlocked later in the function */
1614
1615         debug_print("IMAP fetching messages\n");
1616         ok = imap_select(session, IMAP_FOLDER(folder), item,
1617                          NULL, NULL, NULL, NULL, NULL, FALSE);
1618         if (ok != MAILIMAP_NO_ERROR) {
1619                 g_warning("can't select mailbox %s", item->path);
1620                 g_free(filename);
1621                 return NULL;
1622         }
1623
1624         session_set_access_time(SESSION(session));
1625
1626         debug_print("getting message %d...\n", uid);
1627         ok = imap_cmd_fetch(session, (guint32)uid, filename, headers, body);
1628
1629         if (ok != MAILIMAP_NO_ERROR) {
1630                 g_warning("can't fetch message %d", uid);
1631                 g_free(filename);
1632                 return NULL;
1633         }
1634
1635         session_set_access_time(SESSION(session));
1636         unlock_session(session);
1637
1638         ok = file_strip_crs(filename);
1639
1640         if (ok == 0 && headers && body) {
1641                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1642                 if (cached) {
1643                         procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1644                         procmsg_msginfo_free(&cached);
1645                 }
1646         } else if (ok == -1) {
1647                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1648                 if (cached) {
1649                         procmsg_msginfo_unset_flags(cached, MSG_FULLY_CACHED, 0);
1650                         procmsg_msginfo_free(&cached);
1651                 }
1652         }
1653         return filename;
1654 }
1655
1656 static gboolean imap_is_msg_fully_cached(Folder *folder, FolderItem *item, gint uid)
1657 {
1658         gchar *filename;
1659         guint size = 0;
1660         MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1661
1662         if (!cached)
1663                 return FALSE;
1664
1665         if (MSG_IS_FULLY_CACHED(cached->flags)) {
1666                 procmsg_msginfo_free(&cached);
1667                 return TRUE;
1668         }
1669
1670         filename = imap_get_cached_filename(item, uid);
1671
1672         if (is_file_exist(filename)) {
1673                 if (cached && cached->total_size == cached->size) {
1674                         /* fast path */
1675                         g_free(filename);
1676                         procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1677                         return TRUE;
1678                 }
1679                 size = get_file_size_with_crs(filename);
1680         }
1681         g_free(filename);
1682         debug_print("msg %d cached, has size %d, full should be %zd.\n", uid, size, cached->size);
1683         if (cached && size >= cached->size) {
1684                 cached->total_size = cached->size;
1685                 procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1686                 procmsg_msginfo_free(&cached);
1687                 return TRUE;
1688         }
1689         if (cached)
1690                 procmsg_msginfo_free(&cached);
1691         return FALSE;
1692 }
1693
1694 void imap_cache_msg(FolderItem *item, gint msgnum)
1695 {
1696         Folder *folder = NULL;
1697
1698         if (!item)
1699                 return;
1700         folder = item->folder;
1701
1702         if (!imap_is_msg_fully_cached(folder, item, msgnum)) {
1703                 gchar *tmp = imap_fetch_msg_full(folder, item, msgnum, TRUE, TRUE);
1704                 debug_print("fetched %s\n", tmp);
1705                 g_free(tmp);
1706         }
1707 }
1708
1709 static gint imap_add_msg(Folder *folder, FolderItem *dest,
1710                          const gchar *file, MsgFlags *flags)
1711 {
1712         gint ret;
1713         GSList file_list;
1714         MsgFileInfo fileinfo;
1715
1716         g_return_val_if_fail(file != NULL, -1);
1717
1718         fileinfo.msginfo = NULL;
1719         fileinfo.file = (gchar *)file;
1720         fileinfo.flags = flags;
1721         file_list.data = &fileinfo;
1722         file_list.next = NULL;
1723
1724         ret = imap_add_msgs(folder, dest, &file_list, NULL);
1725         return ret;
1726 }
1727
1728 static gint imap_add_msgs(Folder *folder, FolderItem *dest, GSList *file_list,
1729                    GHashTable *relation)
1730 {
1731         gchar *destdir;
1732         IMAPSession *session;
1733         guint32 last_uid = 0;
1734         GSList *cur;
1735         MsgFileInfo *fileinfo;
1736         gint ok = MAILIMAP_NO_ERROR;
1737         gint curnum = 0, total = 0;
1738         gboolean missing_uids = FALSE;
1739
1740         g_return_val_if_fail(folder != NULL, -1);
1741         g_return_val_if_fail(dest != NULL, -1);
1742         g_return_val_if_fail(file_list != NULL, -1);
1743
1744         debug_print("getting session...\n");
1745         session = imap_session_get(folder);
1746         if (!session) {
1747                 return -1;
1748         }
1749         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
1750         if (is_fatal(ok)) {
1751                 g_free(destdir);
1752                 return -1;
1753         }
1754         statusbar_print_all(_("Adding messages..."));
1755         total = g_slist_length(file_list);
1756         for (cur = file_list; cur != NULL; cur = cur->next) {
1757                 IMAPFlags iflags = 0;
1758                 guint32 new_uid = 0;
1759                 gchar *real_file = NULL;
1760                 fileinfo = (MsgFileInfo *)cur->data;
1761
1762                 statusbar_progress_all(curnum, total, total < 10 ? 1:10);
1763                 curnum++;
1764
1765                 if (fileinfo->flags) {
1766                         if (MSG_IS_MARKED(*fileinfo->flags))
1767                                 iflags |= IMAP_FLAG_FLAGGED;
1768                         if (MSG_IS_REPLIED(*fileinfo->flags))
1769                                 iflags |= IMAP_FLAG_ANSWERED;
1770                         if (MSG_IS_FORWARDED(*fileinfo->flags))
1771                                 iflags |= IMAP_FLAG_FORWARDED;
1772                         if (MSG_IS_SPAM(*fileinfo->flags))
1773                                 iflags |= IMAP_FLAG_SPAM;
1774                         else
1775                                 iflags |= IMAP_FLAG_HAM;
1776                         if (!MSG_IS_UNREAD(*fileinfo->flags))
1777                                 iflags |= IMAP_FLAG_SEEN;
1778
1779                 }
1780
1781                 if (real_file == NULL)
1782                         real_file = g_strdup(fileinfo->file);
1783
1784                 if (folder_has_parent_of_type(dest, F_QUEUE) ||
1785                     folder_has_parent_of_type(dest, F_OUTBOX) ||
1786                     folder_has_parent_of_type(dest, F_DRAFT) ||
1787                     folder_has_parent_of_type(dest, F_TRASH))
1788                         iflags |= IMAP_FLAG_SEEN;
1789
1790                 ok = imap_cmd_append(session, IMAP_FOLDER_ITEM(dest), destdir, real_file, iflags,
1791                                      &new_uid);
1792
1793                 if (ok != MAILIMAP_NO_ERROR) {
1794                         g_warning("can't append message %s", real_file);
1795                         g_free(real_file);
1796                         g_free(destdir);
1797                         statusbar_progress_all(0,0,0);
1798                         statusbar_pop_all();
1799                         return -1;
1800                 } else {
1801                         debug_print("appended new message as %d\n", new_uid);
1802                         /* put the local file in the imapcache, so that we don't
1803                          * have to fetch it back later. */
1804
1805                         if (new_uid == 0) {
1806                                 missing_uids = TRUE;
1807                                 debug_print("Missing UID (0)\n");
1808                         }
1809                         if (new_uid > 0) {
1810                                 gchar *cache_path = folder_item_get_path(dest);
1811                                 if (!is_dir_exist(cache_path))
1812                                         make_dir_hier(cache_path);
1813                                 if (is_dir_exist(cache_path)) {
1814                                         gchar *cache_file = g_strconcat(
1815                                                 cache_path, G_DIR_SEPARATOR_S,
1816                                                 itos(new_uid), NULL);
1817                                         copy_file(real_file, cache_file, TRUE);
1818                                         debug_print("got UID %d, copied to cache: %s\n", new_uid, cache_file);
1819                                         g_free(cache_file);
1820                                 }
1821                                 g_free(cache_path);
1822                         }
1823                 }
1824
1825                 if (relation != NULL)
1826                         g_hash_table_insert(relation, fileinfo->msginfo != NULL ?
1827                                           (gpointer) fileinfo->msginfo : (gpointer) fileinfo,
1828                                           GINT_TO_POINTER(new_uid));
1829                 if (last_uid < new_uid) {
1830                         last_uid = new_uid;
1831                 }
1832
1833                 g_free(real_file);
1834         }
1835
1836         statusbar_progress_all(0,0,0);
1837         statusbar_pop_all();
1838
1839
1840         g_free(destdir);
1841
1842         imap_scan_required(folder, dest);
1843
1844         session = imap_session_get(folder);
1845         if (!session) {
1846                 return -1;
1847         }
1848         if (missing_uids) {
1849                 gint a;
1850                 ok = imap_select(session, IMAP_FOLDER(folder), dest,
1851                          &a, NULL, NULL, NULL, NULL, FALSE);
1852         }
1853         return last_uid;
1854 }
1855
1856 static GSList *flatten_mailimap_set(struct mailimap_set * set)
1857 {
1858         GSList *result = NULL;
1859         clistiter *list;
1860         guint32 start, end, t;
1861         GSList *cur;
1862
1863         if (!set || !set->set_list)
1864                 return NULL;
1865
1866         for (list = clist_begin(set->set_list); list; list = clist_next(list)) {
1867                 struct mailimap_set_item *item = (struct mailimap_set_item *)clist_content(list);
1868                 start = item->set_first;
1869                 end = item->set_last;
1870                 if (start <= end) {
1871                         for (t = start; t <= end; t++) {
1872                                 result = g_slist_prepend(result, GINT_TO_POINTER(t));
1873                         }
1874                 }
1875         }
1876         result = g_slist_reverse(result);
1877         if (debug_get_mode()) {
1878                 debug_print("flat imap set: ");
1879                 for (cur = result; cur; cur = cur->next) {
1880                         debug_print("%d ", GPOINTER_TO_INT(cur->data));
1881                 }
1882                 debug_print("\n");
1883         }
1884
1885         return result;
1886 }
1887 static gint imap_do_copy_msgs(Folder *folder, FolderItem *dest,
1888                               MsgInfoList *msglist, GHashTable *relation,
1889                               gboolean same_dest_ok)
1890 {
1891         FolderItem *src;
1892         gchar *destdir;
1893         GSList *seq_list, *cur;
1894         MsgInfo *msginfo;
1895         IMAPSession *session;
1896         gint ok = MAILIMAP_NO_ERROR;
1897         GHashTable *uid_hash;
1898         gint last_num = 0;
1899
1900         g_return_val_if_fail(folder != NULL, -1);
1901         g_return_val_if_fail(dest != NULL, -1);
1902         g_return_val_if_fail(msglist != NULL, -1);
1903
1904         debug_print("getting session...\n");
1905         session = imap_session_get(folder);
1906
1907         if (!session) {
1908                 return -1;
1909         }
1910
1911         msginfo = (MsgInfo *)msglist->data;
1912         src = msginfo->folder;
1913         if (!same_dest_ok && src == dest) {
1914                 g_warning("the src folder is identical to the dest.");
1915                 return -1;
1916         }
1917
1918         if (src->folder != dest->folder) {
1919                 GSList *infolist = NULL, *cur;
1920                 int res = -1;
1921                 for (cur = msglist; cur; cur = cur->next) {
1922                         msginfo = (MsgInfo *)cur->data;
1923                         MsgFileInfo *fileinfo = g_new0(MsgFileInfo, 1);
1924                         fileinfo->file = procmsg_get_message_file(msginfo);
1925                         fileinfo->flags = &(msginfo->flags);
1926                         infolist = g_slist_prepend(infolist, fileinfo);
1927                 }
1928                 infolist = g_slist_reverse(infolist);
1929                 res = folder_item_add_msgs(dest, infolist, FALSE);
1930                 for (cur = infolist; cur; cur = cur->next) {
1931                         MsgFileInfo *info = (MsgFileInfo *)cur->data;
1932                         g_free(info->file);
1933                         g_free(info);
1934                 }
1935                 g_slist_free(infolist);
1936                 return res;
1937         }
1938
1939         lock_session(session); /* unlocked later in the function */
1940
1941         ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
1942                          NULL, NULL, NULL, NULL, NULL, FALSE);
1943         if (ok != MAILIMAP_NO_ERROR) {
1944                 return ok;
1945         }
1946
1947         unlock_session(session);
1948
1949         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
1950
1951         if (is_fatal(ok)) {
1952                 g_free(destdir);
1953                 return ok;
1954         }
1955
1956         seq_list = imap_get_lep_set_from_msglist(IMAP_FOLDER(folder), msglist);
1957         uid_hash = g_hash_table_new(g_direct_hash, g_direct_equal);
1958
1959         statusbar_print_all(_("Copying messages..."));
1960         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
1961                 struct mailimap_set * seq_set;
1962                 struct mailimap_set * source = NULL;
1963                 struct mailimap_set * dest = NULL;
1964                 seq_set = cur->data;
1965
1966                 debug_print("Copying messages from %s to %s ...\n",
1967                             src->path, destdir);
1968
1969                 lock_session(session); /* unlocked later in the function */
1970                 ok = imap_cmd_copy(session, seq_set, destdir,
1971                         &source, &dest);
1972
1973                 if (is_fatal(ok)) {
1974                         session = NULL;
1975                 }
1976
1977                 if (ok == MAILIMAP_NO_ERROR) {
1978                         unlock_session(session);
1979                         if (relation && source && dest) {
1980                                 GSList *s_list = flatten_mailimap_set(source);
1981                                 GSList *d_list = flatten_mailimap_set(dest);
1982                                 GSList *s_cur, *d_cur;
1983                                 if (g_slist_length(s_list) == g_slist_length(d_list)) {
1984
1985                                         for (s_cur = s_list, d_cur = d_list;
1986                                              s_cur && d_cur;
1987                                              s_cur = s_cur->next, d_cur = d_cur->next) {
1988                                                 g_hash_table_insert(uid_hash, s_cur->data, d_cur->data);
1989                                         }
1990
1991                                 } else {
1992                                         debug_print("hhhmm, source list length != dest list length.\n");
1993                                 }
1994                                 g_slist_free(s_list);
1995                                 g_slist_free(d_list);
1996                         }
1997                 }
1998
1999
2000                 if (source)
2001                         mailimap_set_free(source);
2002                 if (dest)
2003                         mailimap_set_free(dest);
2004
2005                 if (ok != MAILIMAP_NO_ERROR) {
2006                         g_hash_table_destroy(uid_hash);
2007                         imap_lep_set_free(seq_list);
2008                         statusbar_pop_all();
2009                         return -1;
2010                 }
2011         }
2012
2013         for (cur = msglist; cur != NULL; cur = g_slist_next(cur)) {
2014                 MsgInfo *msginfo = (MsgInfo *)cur->data;
2015                 gpointer hashval;
2016
2017                 hashval = g_hash_table_lookup(uid_hash, GINT_TO_POINTER(msginfo->msgnum));
2018
2019                 if (hashval != NULL) {
2020                         gint num = GPOINTER_TO_INT(hashval);
2021                         g_hash_table_insert(relation, msginfo,
2022                                           GINT_TO_POINTER(num));
2023                         if (num > last_num)
2024                                 last_num = num;
2025                         debug_print("copied message %d as %d\n", msginfo->msgnum, num);
2026                         /* put the local file in the imapcache, so that we don't
2027                          * have to fetch it back later. */
2028                         if (num > 0) {
2029                                 gchar *cache_path = folder_item_get_path(msginfo->folder);
2030                                 gchar *real_file = g_strconcat(
2031                                         cache_path, G_DIR_SEPARATOR_S,
2032                                         itos(msginfo->msgnum), NULL);
2033                                 gchar *cache_file = NULL;
2034                                 g_free(cache_path);
2035                                 cache_path = folder_item_get_path(dest);
2036                                 cache_file = g_strconcat(
2037                                         cache_path, G_DIR_SEPARATOR_S,
2038                                         itos(num), NULL);
2039                                 if (!is_dir_exist(cache_path))
2040                                         make_dir_hier(cache_path);
2041                                 if (is_file_exist(real_file) && is_dir_exist(cache_path)) {
2042                                         if (copy_file(real_file, cache_file, TRUE) < 0)
2043                                                 debug_print("couldn't cache to %s: %s\n", cache_file,
2044                                                             strerror(errno));
2045                                         else
2046                                                 debug_print("copied to cache: %s\n", cache_file);
2047                                 }
2048                                 g_free(real_file);
2049                                 g_free(cache_file);
2050                                 g_free(cache_path);
2051                         }
2052                 } else
2053                         g_hash_table_insert(relation, msginfo,
2054                                           GINT_TO_POINTER(0));
2055         }
2056         statusbar_pop_all();
2057
2058         g_hash_table_destroy(uid_hash);
2059         imap_lep_set_free(seq_list);
2060
2061         g_free(destdir);
2062
2063         IMAP_FOLDER_ITEM(dest)->lastuid = 0;
2064         IMAP_FOLDER_ITEM(dest)->uid_next = 0;
2065         g_slist_free(IMAP_FOLDER_ITEM(dest)->uid_list);
2066         IMAP_FOLDER_ITEM(dest)->uid_list = NULL;
2067
2068         imap_scan_required(folder, dest);
2069         if (ok == MAILIMAP_NO_ERROR)
2070                 return last_num;
2071         else
2072                 return -1;
2073 }
2074
2075 static gint imap_copy_msg(Folder *folder, FolderItem *dest, MsgInfo *msginfo)
2076 {
2077         GSList msglist;
2078
2079         g_return_val_if_fail(msginfo != NULL, -1);
2080
2081         msglist.data = msginfo;
2082         msglist.next = NULL;
2083
2084         return imap_copy_msgs(folder, dest, &msglist, NULL);
2085 }
2086
2087 static gint imap_copy_msgs(Folder *folder, FolderItem *dest,
2088                     MsgInfoList *msglist, GHashTable *relation)
2089 {
2090         MsgInfo *msginfo;
2091         gint ret;
2092
2093         g_return_val_if_fail(folder != NULL, -1);
2094         g_return_val_if_fail(dest != NULL, -1);
2095         g_return_val_if_fail(msglist != NULL, -1);
2096
2097         msginfo = (MsgInfo *)msglist->data;
2098         g_return_val_if_fail(msginfo->folder != NULL, -1);
2099
2100         ret = imap_do_copy_msgs(folder, dest, msglist, relation, FALSE);
2101         return ret;
2102 }
2103
2104 static gboolean imap_matcher_type_is_local(gint matchertype)
2105 {
2106         switch (matchertype) {
2107         case MATCHCRITERIA_FROM:
2108         case MATCHCRITERIA_TO:
2109         case MATCHCRITERIA_CC:
2110         case MATCHCRITERIA_TO_OR_CC:
2111         case MATCHCRITERIA_SUBJECT:
2112         case MATCHCRITERIA_REFERENCES:
2113         case MATCHCRITERIA_MESSAGEID:
2114         case MATCHCRITERIA_INREPLYTO:
2115         case MATCHCRITERIA_AGE_GREATER:
2116         case MATCHCRITERIA_AGE_LOWER:
2117         case MATCHCRITERIA_FORWARDED:
2118         case MATCHCRITERIA_SPAM:
2119         case MATCHCRITERIA_UNREAD:
2120         case MATCHCRITERIA_NEW:
2121         case MATCHCRITERIA_MARKED:
2122         case MATCHCRITERIA_REPLIED:
2123         case MATCHCRITERIA_DELETED:
2124         case MATCHCRITERIA_SIZE_GREATER:
2125         case MATCHCRITERIA_SIZE_SMALLER:
2126         case MATCHCRITERIA_SIZE_EQUAL:
2127                 return TRUE;
2128         }
2129         return FALSE;
2130 }
2131
2132 static IMAPSearchKey* search_make_key(MatcherProp* match, gboolean* is_all)
2133 {
2134         if (match->matchtype == MATCHTYPE_MATCHCASE || match->matchtype == MATCHTYPE_MATCH) {
2135                 IMAPSearchKey* result = NULL;
2136                 gboolean invert = FALSE;
2137                 gint matchertype = match->criteria;
2138
2139                 if (is_all) {
2140                         *is_all = FALSE;
2141                 }
2142
2143                 switch (matchertype) {
2144                 case MATCHCRITERIA_NOT_NEW: invert = TRUE; matchertype = MATCHCRITERIA_NEW; break;
2145                 case MATCHCRITERIA_NOT_MARKED: invert = TRUE; matchertype = MATCHCRITERIA_MARKED; break;
2146                 case MATCHCRITERIA_NOT_FORWARDED: invert = TRUE; matchertype = MATCHCRITERIA_FORWARDED; break;
2147                 case MATCHCRITERIA_NOT_SPAM: invert = TRUE; matchertype = MATCHCRITERIA_SPAM; break;
2148                 case MATCHCRITERIA_NOT_SUBJECT: invert = TRUE; matchertype = MATCHCRITERIA_SUBJECT; break;
2149                 case MATCHCRITERIA_NOT_FROM: invert = TRUE; matchertype = MATCHCRITERIA_FROM; break;
2150                 case MATCHCRITERIA_NOT_TO: invert = TRUE; matchertype = MATCHCRITERIA_TO; break;
2151                 case MATCHCRITERIA_NOT_CC: invert = TRUE; matchertype = MATCHCRITERIA_CC; break;
2152                 case MATCHCRITERIA_NOT_REFERENCES: invert = TRUE; matchertype = MATCHCRITERIA_REFERENCES; break;
2153                 case MATCHCRITERIA_NOT_HEADER: invert = TRUE; matchertype = MATCHCRITERIA_HEADER; break;
2154                 case MATCHCRITERIA_NOT_TAG: invert = TRUE; matchertype = MATCHCRITERIA_TAG; break;
2155                 case MATCHCRITERIA_NOT_HEADERS_PART: invert = TRUE; matchertype = MATCHCRITERIA_HEADERS_PART; break;
2156                 case MATCHCRITERIA_NOT_HEADERS_CONT: invert = TRUE; matchertype = MATCHCRITERIA_HEADERS_CONT; break;
2157                 case MATCHCRITERIA_NOT_MESSAGE: invert = TRUE; matchertype = MATCHCRITERIA_MESSAGE; break;
2158                 case MATCHCRITERIA_NOT_BODY_PART: invert = TRUE; matchertype = MATCHCRITERIA_BODY_PART; break;
2159                 case MATCHCRITERIA_NOT_TO_AND_NOT_CC: invert = TRUE; matchertype = MATCHCRITERIA_TO_OR_CC; break;
2160                 case MATCHCRITERIA_NOT_MESSAGEID: invert = TRUE; matchertype = MATCHCRITERIA_MESSAGEID; break;
2161                 case MATCHCRITERIA_NOT_INREPLYTO: invert = TRUE; matchertype = MATCHCRITERIA_INREPLYTO; break;
2162                 }
2163
2164                 /*
2165                  * this aborts conversion even for predicates understood by the following code.
2166                  * while that might seem wasteful, claws local search for information listed below
2167                  * has proven faster than IMAP search plus network roundtrips. once this changes,
2168                  * consider removing these exceptions.
2169                  */
2170                 if (imap_matcher_type_is_local(matchertype))
2171                         return NULL;
2172
2173                 /* the Message-ID header is also cached */
2174                 if (matchertype == MATCHCRITERIA_HEADER && g_strcmp0("Message-ID", match->header) == 0) {
2175                         return NULL;
2176                 }
2177
2178                 switch (matchertype) {
2179                 case MATCHCRITERIA_FORWARDED:
2180                         result = imap_search_new(IMAP_SEARCH_CRITERIA_TAG, NULL, RTAG_FORWARDED, 0);
2181                         break;
2182
2183                 case MATCHCRITERIA_SPAM:
2184                         result = imap_search_new(IMAP_SEARCH_CRITERIA_TAG, NULL, RTAG_JUNK, 0);
2185                         break;
2186
2187                 case MATCHCRITERIA_MESSAGEID:
2188                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, "Message-ID", match->expr, 0);
2189                         break;
2190
2191                 case MATCHCRITERIA_INREPLYTO:
2192                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, "In-Reply-To", match->expr, 0);
2193                         break;
2194
2195                 case MATCHCRITERIA_REFERENCES:
2196                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, "References", match->expr, 0);
2197                         break;
2198
2199                 case MATCHCRITERIA_TO_OR_CC:
2200                         result = imap_search_or(
2201                                         imap_search_new(IMAP_SEARCH_CRITERIA_TO, NULL, match->expr, 0),
2202                                         imap_search_new(IMAP_SEARCH_CRITERIA_CC, NULL, match->expr, 0)
2203                                         );
2204                         break;
2205
2206                 case MATCHCRITERIA_HEADERS_PART:
2207                 case MATCHCRITERIA_HEADERS_CONT:
2208                         result = imap_search_and(
2209                                         imap_search_not(imap_search_new(IMAP_SEARCH_CRITERIA_BODY, NULL, match->expr, 0)),
2210                                         imap_search_new(IMAP_SEARCH_CRITERIA_MESSAGE, NULL, match->expr, 0)
2211                                         );
2212                         break;
2213
2214                 case MATCHCRITERIA_SIZE_EQUAL:
2215                         result = imap_search_and(
2216                                         imap_search_not(imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_SMALLER, NULL, NULL, match->value)),
2217                                         imap_search_not(imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_GREATER, NULL, NULL, match->value))
2218                                         );
2219                         break;
2220
2221                 case MATCHCRITERIA_NOT_UNREAD:
2222                         result = imap_search_new(IMAP_SEARCH_CRITERIA_READ, NULL, NULL, 0);
2223                         break;
2224
2225                 case MATCHCRITERIA_UNREAD:
2226                         result = imap_search_new(IMAP_SEARCH_CRITERIA_UNREAD, NULL, NULL, 0);
2227                         break;
2228
2229                 case MATCHCRITERIA_NEW:
2230                         result = imap_search_new(IMAP_SEARCH_CRITERIA_NEW, NULL, NULL, 0);
2231                         break;
2232
2233                 case MATCHCRITERIA_MARKED:
2234                         result = imap_search_new(IMAP_SEARCH_CRITERIA_MARKED, NULL, NULL, 0);
2235                         break;
2236
2237                 case MATCHCRITERIA_DELETED:
2238                         result = imap_search_new(IMAP_SEARCH_CRITERIA_DELETED, NULL, NULL, 0);
2239                         break;
2240
2241                 case MATCHCRITERIA_REPLIED:
2242                         result = imap_search_new(IMAP_SEARCH_CRITERIA_REPLIED, NULL, NULL, 0);
2243                         break;
2244
2245                 case MATCHCRITERIA_TAG:
2246                         {
2247                                 gchar *tmp = imap_utf8_to_modified_utf7(match->expr, TRUE);
2248                                 result = imap_search_new(IMAP_SEARCH_CRITERIA_TAG, NULL, tmp, 0);
2249                                 g_free(tmp);
2250                         }
2251                         break;
2252
2253                 case MATCHCRITERIA_SUBJECT:
2254                         result = imap_search_new(IMAP_SEARCH_CRITERIA_SUBJECT, NULL, match->expr, 0);
2255                         break;
2256
2257                 case MATCHCRITERIA_FROM:
2258                         result = imap_search_new(IMAP_SEARCH_CRITERIA_FROM, NULL, match->expr, 0);
2259                         break;
2260
2261                 case MATCHCRITERIA_TO:
2262                         result = imap_search_new(IMAP_SEARCH_CRITERIA_TO, NULL, match->expr, 0);
2263                         break;
2264
2265                 case MATCHCRITERIA_CC:
2266                         result = imap_search_new(IMAP_SEARCH_CRITERIA_CC, NULL, match->expr, 0);
2267                         break;
2268
2269                 case MATCHCRITERIA_AGE_GREATER:
2270                         result = imap_search_new(IMAP_SEARCH_CRITERIA_AGE_GREATER, NULL, NULL, match->value);
2271                         break;
2272
2273                 case MATCHCRITERIA_AGE_LOWER:
2274                         result = imap_search_new(IMAP_SEARCH_CRITERIA_AGE_LOWER, NULL, NULL, match->value);
2275                         break;
2276
2277                 case MATCHCRITERIA_BODY_PART:
2278                         result = imap_search_new(IMAP_SEARCH_CRITERIA_BODY, NULL, match->expr, 0);
2279                         break;
2280
2281                 case MATCHCRITERIA_MESSAGE:
2282                         result = imap_search_new(IMAP_SEARCH_CRITERIA_MESSAGE, NULL, match->expr, 0);
2283                         break;
2284
2285                 case MATCHCRITERIA_HEADER:
2286                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, match->header, match->expr, 0);
2287                         break;
2288
2289                 case MATCHCRITERIA_SIZE_GREATER:
2290                         result = imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_GREATER, NULL, NULL, match->value);
2291                         break;
2292
2293                 case MATCHCRITERIA_SIZE_SMALLER:
2294                         result = imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_SMALLER, NULL, NULL, match->value);
2295                         break;
2296
2297                 default:
2298                         result = imap_search_new(IMAP_SEARCH_CRITERIA_ALL, NULL, NULL, 0);
2299                         if (is_all) {
2300                                 *is_all = TRUE;
2301                         }
2302                         break;
2303                 }
2304
2305                 if (invert) {
2306                         result = imap_search_not(result);
2307                         if (is_all && *is_all) {
2308                                 *is_all = FALSE;
2309                         }
2310                 }
2311
2312                 return result;
2313         }
2314
2315         return NULL;
2316 }
2317
2318 static void imap_change_search_charset(IMAPFolder *folder)
2319 {
2320         /* If server supports charset in searches, but the last used one failed,
2321          * changed to the next preferred charset. If none are still available,
2322          * disable charset searches.
2323          * Charsets are tried in the following order:
2324          * UTF-8, locale's charset, UTF-7.
2325          */
2326
2327         if (folder->search_charset_supported) {
2328                 if (folder->search_charset && !strcmp(folder->search_charset, conv_get_locale_charset_str_no_utf8()))
2329                         folder->search_charset = "UTF-8";
2330                 else if (folder->search_charset && !strcmp(folder->search_charset, "UTF-8"))
2331                         folder->search_charset = "UTF-7";
2332                 else {
2333                         folder->search_charset = NULL;
2334                         folder->search_charset_supported = FALSE;
2335                 }
2336         }
2337 }
2338
2339 static MatcherProp *imap_matcher_prop_set_charset(IMAPFolder *folder,
2340                                                   MatcherProp *utf8_prop,
2341                                                   gchar **charset)
2342 {
2343         /* If the match is going to be done locally, or the criteria is on
2344          * tag (special-cased to modified-UTF-7), or the expression searched
2345          * is ASCII, don't bother converting.
2346          */
2347         if (imap_matcher_type_is_local(utf8_prop->criteria)
2348          || utf8_prop->criteria == MATCHCRITERIA_TAG
2349          || utf8_prop->criteria == MATCHCRITERIA_NOT_TAG
2350          || utf8_prop->expr == NULL
2351          || is_ascii_str(utf8_prop->expr))
2352                 return matcherprop_new(utf8_prop->criteria,
2353                                utf8_prop->header,
2354                                utf8_prop->matchtype,
2355                                utf8_prop->expr,
2356                                utf8_prop->value);
2357         else {
2358                 gchar *conv_expr = NULL;
2359
2360                 /* If the search is server-side and the server doesn't support
2361                  * searching with the charsets we handle, bail out.
2362                  */
2363                 if (folder->search_charset_supported == FALSE)
2364                         return NULL;
2365
2366                 /* Else, convert. */
2367                 if (*charset == NULL)
2368                         *charset = g_strdup(folder->search_charset);
2369
2370                 conv_expr = conv_codeset_strdup(utf8_prop->expr, CS_UTF_8, *charset);
2371
2372                 if (conv_expr == NULL)
2373                         conv_expr = g_strdup(utf8_prop->expr);
2374
2375                 return matcherprop_new(utf8_prop->criteria,
2376                                utf8_prop->header,
2377                                utf8_prop->matchtype,
2378                                conv_expr,
2379                                utf8_prop->value);
2380         }
2381 }
2382
2383 static gint     search_msgs             (Folder                 *folder,
2384                                          FolderItem             *container,
2385                                          MsgNumberList          **msgs,
2386                                          gboolean               *on_server,
2387                                          MatcherList            *predicate,
2388                                          SearchProgressNotify   progress_cb,
2389                                          gpointer               progress_data)
2390 {
2391         IMAPSearchKey* key = NULL;
2392         GSList* cur;
2393         int result = -1;
2394         clist* uidlist = NULL;
2395         gboolean server_filtering_useless = FALSE;
2396         IMAPSession *session;
2397         gchar *charset_to_use = NULL;
2398
2399         if (on_server == NULL || !*on_server) {
2400                 return folder_item_search_msgs_local(folder, container, msgs, on_server,
2401                                 predicate, progress_cb, progress_data);
2402         }
2403
2404         for (cur = predicate->matchers; cur != NULL; cur = cur->next) {
2405                 IMAPSearchKey* matcherPart = NULL;
2406                 MatcherProp* prop = (MatcherProp*) cur->data;
2407                 gboolean is_all;
2408                 MatcherProp *imap_prop = imap_matcher_prop_set_charset(IMAP_FOLDER(folder), prop, &charset_to_use);
2409
2410                 if (imap_prop == NULL) {
2411                         /* Couldn't convert matcherprop to IMAP - probably not ascii
2412                          * and server doesn't support the charsets we do. */
2413                          return -1;
2414                 }
2415
2416                 matcherPart = search_make_key(imap_prop, &is_all);
2417
2418                 matcherprop_free(imap_prop);
2419
2420                 if (on_server) {
2421                         *on_server &= matcherPart != NULL && prop->matchtype == MATCHTYPE_MATCHCASE;
2422                 }
2423
2424                 if (matcherPart) {
2425                         if (key == NULL) {
2426                                 key = matcherPart;
2427                                 server_filtering_useless = is_all;
2428                         } else if (predicate->bool_and) {
2429                                 key = imap_search_and(key, matcherPart);
2430                                 server_filtering_useless &= is_all;
2431                         } else {
2432                                 key = imap_search_or(key, matcherPart);
2433                                 server_filtering_useless |= is_all;
2434                         }
2435                 }
2436         }
2437
2438         if (server_filtering_useless) {
2439                 imap_search_free(key);
2440                 key = NULL;
2441         }
2442
2443         if (key == NULL && progress_cb != NULL) {
2444                 GSList* cur;
2445                 GSList* list;
2446                 int count = 0;
2447
2448                 progress_cb(progress_data, TRUE, 0, 0, container->total_msgs);
2449                 progress_cb(progress_data, TRUE, container->total_msgs, 0, container->total_msgs);
2450
2451                 list = folder_item_get_msg_list(container);
2452                 for (cur = list; cur != NULL; cur = cur->next) {
2453                         *msgs = g_slist_prepend(*msgs, GUINT_TO_POINTER(((MsgInfo*) cur->data)->msgnum));
2454                         count++;
2455                 }
2456                 procmsg_msg_list_free(list);
2457
2458                 *msgs = g_slist_reverse(*msgs);
2459
2460                 return count;
2461         }
2462
2463         session = imap_session_get(folder);
2464         if (!session) {
2465                 return -1;
2466         }
2467         result = imap_select(session, IMAP_FOLDER(folder), FOLDER_ITEM(container),
2468                          NULL, NULL, NULL, NULL, NULL, TRUE);
2469         if (result != MAILIMAP_NO_ERROR)
2470                 return -1;
2471
2472         if (progress_cb)
2473                 progress_cb(progress_data, TRUE, 0, 0, container->total_msgs);
2474         result = imap_threaded_search(folder, IMAP_SEARCH_TYPE_KEYED, key, charset_to_use, NULL, &uidlist);
2475         if (progress_cb)
2476                 progress_cb(progress_data, TRUE, container->total_msgs, 0, container->total_msgs);
2477
2478         if (result == MAILIMAP_NO_ERROR) {
2479                 gint result = 0;
2480
2481                 *msgs = imap_uid_list_from_lep(uidlist, &result);
2482
2483                 mailimap_search_result_free(uidlist);
2484
2485                 if (charset_to_use != NULL)
2486                         g_free(charset_to_use);
2487
2488                 return result;
2489         } else if (charset_to_use != NULL) {
2490                 /* If search failed and was on an 8-bit string, try the next
2491                  * available charset to search if there still are some.
2492                  */
2493                 g_free(charset_to_use);
2494
2495                 imap_change_search_charset(IMAP_FOLDER(folder));
2496                 if (IMAP_FOLDER(folder)->search_charset_supported)
2497                         return search_msgs(folder, container, msgs, on_server, predicate,
2498                                    progress_cb, progress_data);
2499                 else
2500                         return -1;
2501         } else {
2502                 return -1;
2503         }
2504 }
2505
2506
2507 static gint imap_do_remove_msgs(Folder *folder, FolderItem *dest,
2508                                 MsgInfoList *msglist, GHashTable *relation)
2509 {
2510         gchar *destdir, *dir;
2511         GSList *numlist = NULL, *cur;
2512         MsgInfo *msginfo;
2513         IMAPSession *session;
2514         gint ok = MAILIMAP_NO_ERROR;
2515
2516         g_return_val_if_fail(folder != NULL, -1);
2517         g_return_val_if_fail(dest != NULL, -1);
2518         g_return_val_if_fail(msglist != NULL, -1);
2519
2520         debug_print("getting session...\n");
2521         session = imap_session_get(folder);
2522         if (!session) {
2523                 return -1;
2524         }
2525
2526         lock_session(session); /* unlocked later in the function */
2527
2528         msginfo = (MsgInfo *)msglist->data;
2529
2530         ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
2531                          NULL, NULL, NULL, NULL, NULL, FALSE);
2532         if (ok != MAILIMAP_NO_ERROR) {
2533                 return ok;
2534         }
2535
2536         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
2537         if (is_fatal(ok)) {
2538                 g_free(destdir);
2539                 return ok;
2540         }
2541         for (cur = msglist; cur; cur = cur->next) {
2542                 msginfo = (MsgInfo *)cur->data;
2543                 if (!MSG_IS_DELETED(msginfo->flags))
2544                         numlist = g_slist_prepend(numlist, GINT_TO_POINTER(msginfo->msgnum));
2545         }
2546         numlist = g_slist_reverse(numlist);
2547
2548         if (numlist != NULL) {
2549                 ok = imap_set_message_flags
2550                         (session, IMAP_FOLDER_ITEM(msginfo->folder), numlist, IMAP_FLAG_DELETED, NULL, TRUE);
2551                 if (ok != MAILIMAP_NO_ERROR) {
2552                         log_warning(LOG_PROTOCOL, _("can't set deleted flags\n"));
2553                         g_free(destdir);
2554                         return ok;
2555                 }
2556         } /* else we just need to expunge */
2557         ok = imap_cmd_expunge(session);
2558         if (ok != MAILIMAP_NO_ERROR) {
2559                 log_warning(LOG_PROTOCOL, _("can't expunge\n"));
2560                 g_free(destdir);
2561                 return ok;
2562         }
2563
2564         session->folder_content_changed = TRUE;
2565         unlock_session(session);
2566
2567         dir = folder_item_get_path(msginfo->folder);
2568         if (is_dir_exist(dir)) {
2569                 for (cur = msglist; cur; cur = cur->next) {
2570                         msginfo = (MsgInfo *)cur->data;
2571                         remove_numbered_files(dir, msginfo->msgnum, msginfo->msgnum);
2572                 }
2573         }
2574         g_free(dir);
2575
2576         g_slist_free(numlist);
2577
2578         imap_scan_required(folder, dest);
2579
2580         g_free(destdir);
2581
2582         return 0;
2583 }
2584
2585 static gint imap_remove_msgs(Folder *folder, FolderItem *dest,
2586                     MsgInfoList *msglist, GHashTable *relation)
2587 {
2588         MsgInfo *msginfo;
2589
2590         g_return_val_if_fail(folder != NULL, -1);
2591         g_return_val_if_fail(dest != NULL, -1);
2592         if (msglist == NULL)
2593                 return 0;
2594
2595         msginfo = (MsgInfo *)msglist->data;
2596         g_return_val_if_fail(msginfo->folder != NULL, -1);
2597
2598         return imap_do_remove_msgs(folder, dest, msglist, relation);
2599 }
2600
2601 static gint imap_remove_all_msg(Folder *folder, FolderItem *item)
2602 {
2603         GSList *list = folder_item_get_msg_list(item);
2604         gint res = imap_remove_msgs(folder, item, list, NULL);
2605         procmsg_msg_list_free(list);
2606         return res;
2607 }
2608
2609 static gboolean imap_is_msg_changed(Folder *folder, FolderItem *item,
2610                                     MsgInfo *msginfo)
2611 {
2612         /* TODO: properly implement this method */
2613         return FALSE;
2614 }
2615
2616 static gint imap_close(Folder *folder, FolderItem *item)
2617 {
2618         return 0;
2619 }
2620
2621 static gint imap_scan_tree_real(Folder *folder, gboolean subs_only)
2622 {
2623         FolderItem *item = NULL;
2624         IMAPSession *session;
2625         gchar *root_folder = NULL;
2626
2627         g_return_val_if_fail(folder != NULL, -1);
2628         g_return_val_if_fail(folder->account != NULL, -1);
2629
2630         debug_print("getting session...\n");
2631         session = imap_session_get(folder);
2632         if (!session) {
2633                 if (!folder->node) {
2634                         folder_tree_destroy(folder);
2635                         item = folder_item_new(folder, folder->name, NULL);
2636                         item->folder = folder;
2637                         folder->node = item->node = g_node_new(item);
2638                 }
2639                 return -1;
2640         }
2641
2642         if (folder->account->imap_dir && *folder->account->imap_dir) {
2643                 gchar *real_path;
2644                 int r = MAILIMAP_NO_ERROR;
2645                 clist * lep_list;
2646
2647                 Xstrdup_a(root_folder, folder->account->imap_dir, {return -1;});
2648                 extract_quote(root_folder, '"');
2649                 subst_char(root_folder,
2650                            imap_get_path_separator(session, IMAP_FOLDER(folder),
2651                                                    root_folder, &r),
2652                            '/');
2653                 if (is_fatal(r))
2654                         return -1;
2655                 strtailchomp(root_folder, '/');
2656                 real_path = imap_get_real_path
2657                         (session, IMAP_FOLDER(folder), root_folder, &r);
2658                 if (is_fatal(r)) {
2659                         g_free(real_path);
2660                         return -1;
2661                 }
2662                 debug_print("IMAP root directory: %s\n", real_path);
2663
2664                 /* check if root directory exist */
2665
2666                 r = imap_threaded_list(session->folder, "", real_path,
2667                                        &lep_list);
2668
2669                 if (r != MAILIMAP_NO_ERROR)
2670                         imap_handle_error(SESSION(session), NULL, r);
2671
2672                 if ((r != MAILIMAP_NO_ERROR) || (clist_count(lep_list) == 0)) {
2673                         if (!folder->node) {
2674                                 item = folder_item_new(folder, folder->name, NULL);
2675                                 item->folder = folder;
2676                                 folder->node = item->node = g_node_new(item);
2677                         }
2678                         return -1;
2679                 }
2680                 mailimap_list_result_free(lep_list);
2681
2682                 g_free(real_path);
2683         }
2684
2685         if (folder->node)
2686                 item = FOLDER_ITEM(folder->node->data);
2687
2688         if (item && !item->path && root_folder) {
2689                 item->path = g_strdup(root_folder);
2690         }
2691
2692         if (!item || ((item->path || root_folder) &&
2693                       strcmp2(item->path, root_folder) != 0)) {
2694                 folder_tree_destroy(folder);
2695                 item = folder_item_new(folder, folder->name, root_folder);
2696                 item->folder = folder;
2697                 folder->node = item->node = g_node_new(item);
2698         }
2699
2700         imap_scan_tree_recursive(session, FOLDER_ITEM(folder->node->data), subs_only);
2701         imap_create_missing_folders(folder);
2702
2703         return 0;
2704 }
2705
2706 static gint imap_scan_tree(Folder *folder)
2707 {
2708         gboolean subs_only = FALSE;
2709         if (folder->account) {
2710                 debug_print(" scanning only subs %d\n", folder->account->imap_subsonly);
2711                 subs_only = folder->account->imap_subsonly;
2712         }
2713         return imap_scan_tree_real(folder, subs_only);
2714 }
2715
2716 static gint imap_scan_tree_recursive(IMAPSession *session, FolderItem *item, gboolean subs_only)
2717 {
2718         Folder *folder;
2719         IMAPFolder *imapfolder;
2720         FolderItem *new_item;
2721         GSList *item_list, *cur;
2722         GNode *node;
2723         gchar *real_path;
2724         gchar *wildcard_path;
2725         gchar separator;
2726         gchar wildcard[3];
2727         clist * lep_list;
2728         int r = MAILIMAP_NO_ERROR;
2729
2730         g_return_val_if_fail(item != NULL, -1);
2731         g_return_val_if_fail(item->folder != NULL, -1);
2732         g_return_val_if_fail(item->no_sub == FALSE, -1);
2733
2734         folder = item->folder;
2735         imapfolder = IMAP_FOLDER(folder);
2736
2737         separator = imap_get_path_separator(session, imapfolder, item->path, &r);
2738         if (is_fatal(r))
2739                 return r;
2740
2741         if (folder->ui_func)
2742                 folder->ui_func(folder, item, folder->ui_func_data);
2743
2744         if (item->path) {
2745                 wildcard[0] = separator;
2746                 wildcard[1] = '%';
2747                 wildcard[2] = '\0';
2748                 real_path = imap_get_real_path(session, imapfolder, item->path, &r);
2749                 if (is_fatal(r)) {
2750                         g_free(real_path);
2751                         return r;
2752                 }
2753         } else {
2754                 wildcard[0] = '%';
2755                 wildcard[1] = '\0';
2756                 real_path = g_strdup("");
2757         }
2758
2759         Xstrcat_a(wildcard_path, real_path, wildcard,
2760                   {g_free(real_path); return MAILIMAP_ERROR_BAD_STATE;});
2761         lep_list = NULL;
2762
2763         if (subs_only)
2764                 r = imap_threaded_lsub(folder, "", wildcard_path, &lep_list);
2765         else
2766                 r = imap_threaded_list(folder, "", wildcard_path, &lep_list);
2767
2768         if (r != MAILIMAP_NO_ERROR) {
2769                 imap_handle_error(SESSION(session), NULL, r);
2770                 item_list = NULL;
2771                 g_free(real_path);
2772                 return r;
2773         }
2774         else {
2775                 item_list = imap_list_from_lep(imapfolder,
2776                                                lep_list, real_path, FALSE);
2777                 mailimap_list_result_free(lep_list);
2778         }
2779
2780         g_free(real_path);
2781
2782         node = item->node->children;
2783         while (node != NULL) {
2784                 FolderItem *old_item = FOLDER_ITEM(node->data);
2785                 GNode *next = node->next;
2786
2787                 new_item = NULL;
2788                 for (cur = item_list; cur != NULL; cur = cur->next) {
2789                         FolderItem *cur_item = FOLDER_ITEM(cur->data);
2790                         if (!strcmp2(old_item->path, cur_item->path)) {
2791                                 new_item = cur_item;
2792                                 break;
2793                         }
2794                 }
2795                 if (!new_item) {
2796                         if (old_item && old_item->path && !strcasecmp(old_item->path, "INBOX")) {
2797                                 debug_print("not removing INBOX\n");
2798                         } else {
2799                                 debug_print("folder '%s' not found. removing...\n",
2800                                             old_item->path);
2801                                 folder_item_remove(old_item);
2802                         }
2803                 } else {
2804                         old_item->no_sub = new_item->no_sub;
2805                         old_item->no_select = new_item->no_select;
2806                         if (old_item->no_sub == TRUE && node->children) {
2807                                 debug_print("folder '%s' doesn't have "
2808                                             "subfolders. removing...\n",
2809                                             old_item->path);
2810                                 folder_item_remove_children(old_item);
2811                         }
2812                 }
2813
2814                 node = next;
2815         }
2816
2817         for (cur = item_list; cur != NULL; cur = cur->next) {
2818                 FolderItem *cur_item = FOLDER_ITEM(cur->data);
2819                 new_item = NULL;
2820
2821                 for (node = item->node->children; node != NULL;
2822                      node = node->next) {
2823                         if (!strcmp2(FOLDER_ITEM(node->data)->path,
2824                                      cur_item->path)) {
2825                                 new_item = FOLDER_ITEM(node->data);
2826                                 folder_item_destroy(cur_item);
2827                                 cur_item = NULL;
2828                                 break;
2829                         }
2830                 }
2831                 if (!new_item) {
2832                         new_item = cur_item;
2833                         debug_print("new folder '%s' found.\n", new_item->path);
2834                         folder_item_append(item, new_item);
2835                 }
2836
2837                 if (!strcasecmp(new_item->path, "INBOX")) {
2838                         new_item->stype = F_INBOX;
2839                         folder->inbox = new_item;
2840                 } else if (!folder_item_parent(item) || item->stype == F_INBOX) {
2841                         gchar *base;
2842
2843                         base = g_path_get_basename(new_item->path);
2844
2845                         if (!folder->outbox && !g_ascii_strcasecmp(base, "Sent")) {
2846                                 new_item->stype = F_OUTBOX;
2847                                 folder->outbox = new_item;
2848                         } else if (!folder->draft && (!g_ascii_strcasecmp(base, "Drafts") || !g_ascii_strcasecmp(base, "Draft"))) {
2849                                 new_item->stype = F_DRAFT;
2850                                 folder->draft = new_item;
2851                         } else if (!folder->queue && !g_ascii_strcasecmp(base, "Queue")) {
2852                                 new_item->stype = F_QUEUE;
2853                                 folder->queue = new_item;
2854                         } else if (!folder->trash && !g_ascii_strcasecmp(base, "Trash")) {
2855                                 new_item->stype = F_TRASH;
2856                                 folder->trash = new_item;
2857                         }
2858                         g_free(base);
2859                 }
2860
2861                 if (new_item->no_sub == FALSE)
2862                         imap_scan_tree_recursive(session, new_item, subs_only);
2863         }
2864
2865         g_slist_free(item_list);
2866
2867         return MAILIMAP_NO_ERROR;
2868 }
2869
2870 GList *imap_scan_subtree(Folder *folder, FolderItem *item, gboolean unsubs_only, gboolean recursive)
2871 {
2872         IMAPSession *session = imap_session_get(folder);
2873         gchar *real_path;
2874         gchar *wildcard_path;
2875         gchar separator;
2876         gchar wildcard[3];
2877         clist * lep_list;
2878         GSList *item_list = NULL, *cur;
2879         GList *child_list = NULL, *tmplist = NULL;
2880         GSList *sub_list = NULL;
2881         int r = MAILIMAP_NO_ERROR;
2882
2883         if (!session)
2884                 return NULL;
2885
2886         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &r);
2887         if (is_fatal(r))
2888                 return NULL;
2889
2890         if (item->path) {
2891                 wildcard[0] = separator;
2892                 wildcard[1] = '%';
2893                 wildcard[2] = '\0';
2894                 real_path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &r);
2895                 if (is_fatal(r)) {
2896                         g_free(real_path);
2897                         return NULL;
2898                 }
2899         } else {
2900                 wildcard[0] = '%';
2901                 wildcard[1] = '\0';
2902                 real_path = g_strdup("");
2903         }
2904
2905         Xstrcat_a(wildcard_path, real_path, wildcard,
2906                   {g_free(real_path); return NULL;});
2907         lep_list = NULL;
2908
2909         if (unsubs_only)
2910                 statusbar_print_all(_("Looking for unsubscribed folders in %s..."),
2911                                 item->path?item->path:item->name);
2912         else
2913                 statusbar_print_all(_("Looking for subfolders of %s..."),
2914                                 item->path?item->path:item->name);
2915
2916         r = imap_threaded_list(folder, "", wildcard_path, &lep_list);
2917         if (r) {
2918                 g_free(real_path);
2919                 statusbar_pop_all();
2920                 return NULL;
2921         }
2922         item_list = imap_list_from_lep(IMAP_FOLDER(folder),
2923                                lep_list, real_path, FALSE);
2924         mailimap_list_result_free(lep_list);
2925
2926         for (cur = item_list; cur != NULL; cur = cur->next) {
2927                 FolderItem *cur_item = FOLDER_ITEM(cur->data);
2928                 if (recursive) {
2929                         tmplist = imap_scan_subtree(folder, cur_item,
2930                                         unsubs_only, recursive);
2931                         if (tmplist)
2932                                 child_list = g_list_concat(child_list, tmplist);
2933                 }
2934                 child_list = g_list_prepend(child_list,
2935                                 imap_get_real_path(session,
2936                                         IMAP_FOLDER(folder), cur_item->path, &r));
2937                 if (is_fatal(r)) {
2938                         g_free(real_path);
2939                         statusbar_pop_all();
2940                         return NULL;
2941                 }
2942                 folder_item_destroy(cur_item);
2943         }
2944         child_list = g_list_reverse(child_list);
2945         g_slist_free(item_list);
2946
2947         if (unsubs_only) {
2948                 r = imap_threaded_lsub(folder, "", wildcard_path, &lep_list);
2949                 if (r) {
2950                         g_free(real_path);
2951                         statusbar_pop_all();
2952                         return NULL;
2953                 }
2954                 sub_list = imap_list_from_lep(IMAP_FOLDER(folder),
2955                                        lep_list, real_path, FALSE);
2956                 mailimap_list_result_free(lep_list);
2957
2958                 for (cur = sub_list; cur != NULL; cur = cur->next) {
2959                         FolderItem *cur_item = FOLDER_ITEM(cur->data);
2960                         GList *oldlitem = NULL;
2961                         gchar *tmp = imap_get_real_path(session,
2962                                         IMAP_FOLDER(folder), cur_item->path, &r);
2963                         if (r) {
2964                                 g_free(real_path);
2965                                 statusbar_pop_all();
2966                                 g_free(tmp);
2967                                 return NULL;
2968                         }
2969                         folder_item_destroy(cur_item);
2970                         oldlitem = g_list_find_custom(
2971                                         child_list, tmp, (GCompareFunc)strcmp2);
2972                         if (oldlitem) {
2973                                 child_list = g_list_remove_link(child_list, oldlitem);
2974                                 g_free(oldlitem->data);
2975                                 g_list_free(oldlitem);
2976                         }
2977                         g_free(tmp);
2978                 }
2979         }
2980
2981         g_free(real_path);
2982         statusbar_pop_all();
2983
2984         return child_list;
2985 }
2986
2987 static gint imap_create_tree(Folder *folder)
2988 {
2989         g_return_val_if_fail(folder != NULL, -1);
2990         g_return_val_if_fail(folder->node != NULL, -1);
2991         g_return_val_if_fail(folder->node->data != NULL, -1);
2992         g_return_val_if_fail(folder->account != NULL, -1);
2993
2994         imap_scan_tree(folder);
2995         imap_create_missing_folders(folder);
2996
2997         return 0;
2998 }
2999
3000 static void imap_create_missing_folders(Folder *folder)
3001 {
3002         g_return_if_fail(folder != NULL);
3003
3004         if (!folder->inbox)
3005                 folder->inbox = imap_create_special_folder
3006                         (folder, F_INBOX, "INBOX");
3007         if (!folder->trash)
3008                 folder->trash = imap_create_special_folder
3009                         (folder, F_TRASH, "Trash");
3010         if (!folder->queue)
3011                 folder->queue = imap_create_special_folder
3012                         (folder, F_QUEUE, "Queue");
3013         if (!folder->outbox)
3014                 folder->outbox = imap_create_special_folder
3015                         (folder, F_OUTBOX, "Sent");
3016         if (!folder->draft)
3017                 folder->draft = imap_create_special_folder
3018                         (folder, F_DRAFT, "Drafts");
3019 }
3020
3021 static FolderItem *imap_create_special_folder(Folder *folder,
3022                                               SpecialFolderItemType stype,
3023                                               const gchar *name)
3024 {
3025         FolderItem *item;
3026         FolderItem *new_item;
3027
3028         g_return_val_if_fail(folder != NULL, NULL);
3029         g_return_val_if_fail(folder->node != NULL, NULL);
3030         g_return_val_if_fail(folder->node->data != NULL, NULL);
3031         g_return_val_if_fail(folder->account != NULL, NULL);
3032         g_return_val_if_fail(name != NULL, NULL);
3033
3034         item = FOLDER_ITEM(folder->node->data);
3035         new_item = imap_create_folder(folder, item, name);
3036
3037         if (!new_item) {
3038                 g_warning("Can't create '%s'", name);
3039                 if (!folder->inbox) return NULL;
3040
3041                 new_item = imap_create_folder(folder, folder->inbox, name);
3042                 if (!new_item)
3043                         g_warning("Can't create '%s' under INBOX", name);
3044                 else
3045                         new_item->stype = stype;
3046         } else
3047                 new_item->stype = stype;
3048
3049         return new_item;
3050 }
3051
3052 static gchar *imap_folder_get_path(Folder *folder)
3053 {
3054         gchar *folder_path;
3055
3056         g_return_val_if_fail(folder != NULL, NULL);
3057         g_return_val_if_fail(folder->account != NULL, NULL);
3058
3059 #ifdef G_OS_WIN32
3060         gchar *sanitized_dirname = g_strdup(folder->account->recv_server);
3061         g_strdelimit(sanitized_dirname, ":", ',');
3062 #endif
3063
3064         folder_path = g_strconcat(get_imap_cache_dir(),
3065                                   G_DIR_SEPARATOR_S,
3066 #ifdef G_OS_WIN32
3067                                                                                                                                         sanitized_dirname,
3068 #else
3069                                   folder->account->recv_server,
3070 #endif
3071                                   G_DIR_SEPARATOR_S,
3072                                   folder->account->userid,
3073                                   NULL);
3074
3075 #ifdef G_OS_WIN32
3076         g_free(sanitized_dirname);
3077 #endif
3078         return folder_path;
3079 }
3080
3081 #ifdef G_OS_WIN32
3082 static gchar *imap_encode_unsafe_chars(const gchar *str)
3083 {
3084         gchar *ret = NULL, *o_ret;
3085         gchar *i;
3086         if (!str)
3087                 return NULL;
3088         ret = g_malloc(3*strlen(str)+1);
3089         o_ret = ret;
3090         for (i = (gchar *)str; *i; i++) {
3091                 switch(*i) {
3092                         case ':':
3093                         case '|':
3094                         case '<':
3095                         case '>':
3096                         case '*':
3097                         case '?':
3098                         case '#':
3099                                 *ret++ = '%';
3100                                 *ret++ = '0'+(*i/10);
3101                                 *ret++ = '0'+(*i%10);
3102                                 break;
3103                         default:
3104                                 *ret++ = *i;
3105                 }
3106         }
3107         *ret++ = '\0';
3108         return o_ret;
3109 }
3110 #endif
3111 static gchar *imap_item_get_path(Folder *folder, FolderItem *item)
3112 {
3113         gchar *folder_path, *path;
3114         gchar *item_path = NULL;
3115
3116         g_return_val_if_fail(folder != NULL, NULL);
3117         g_return_val_if_fail(item != NULL, NULL);
3118         folder_path = imap_folder_get_path(folder);
3119
3120         g_return_val_if_fail(folder_path != NULL, NULL);
3121
3122 #ifdef G_OS_UNIX
3123         item_path = g_strdup(item->path);
3124 #else
3125         item_path = imap_encode_unsafe_chars(item->path);
3126 #endif
3127
3128         if (g_path_is_absolute(folder_path)) {
3129                 if (item_path)
3130                         path = g_strconcat(folder_path, G_DIR_SEPARATOR_S,
3131                                            item_path, NULL);
3132                 else
3133                         path = g_strdup(folder_path);
3134         } else {
3135                 if (item_path)
3136                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
3137                                            folder_path, G_DIR_SEPARATOR_S,
3138                                            item_path, NULL);
3139                 else
3140                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
3141                                            folder_path, NULL);
3142         }
3143         g_free(folder_path);
3144         g_free(item_path);
3145 #ifdef G_OS_WIN32
3146         while (strchr(path, '/'))
3147                 *strchr(path, '/') = '\\';
3148 #endif
3149
3150         return path;
3151 }
3152
3153 static FolderItem *imap_create_folder(Folder *folder, FolderItem *parent,
3154                                const gchar *name)
3155 {
3156         gchar *dirpath, *imap_path;
3157         IMAPSession *session;
3158         FolderItem *new_item;
3159         gchar separator;
3160         gchar *new_name;
3161         const gchar *p;
3162         gint ok = MAILIMAP_NO_ERROR;
3163         gboolean no_select = FALSE, no_sub = FALSE;
3164         gboolean exist = FALSE;
3165
3166         g_return_val_if_fail(folder != NULL, NULL);
3167         g_return_val_if_fail(folder->account != NULL, NULL);
3168         g_return_val_if_fail(parent != NULL, NULL);
3169         g_return_val_if_fail(name != NULL, NULL);
3170
3171         if (to_number(name) > 0) {
3172                 gchar *cached_msg = imap_get_cached_filename(parent, to_number(name));
3173                 if (is_file_exist(cached_msg)) {
3174                         if (claws_unlink(cached_msg) != 0) {
3175                                 return NULL;
3176                         }
3177                 }
3178         }
3179
3180         debug_print("getting session...\n");
3181         session = imap_session_get(folder);
3182         if (!session) {
3183                 return NULL;
3184         }
3185
3186         if (!folder_item_parent(parent) && strcasecmp(name, "INBOX") == 0) {
3187                 dirpath = g_strdup(name);
3188         }else if (parent->path)
3189                 dirpath = g_strconcat(parent->path, "/", name, NULL);
3190         else if ((p = strchr(name, '/')) != NULL && *(p + 1) != '\0')
3191                 dirpath = g_strdup(name);
3192         else if (folder->account->imap_dir && *folder->account->imap_dir) {
3193                 gchar *imap_dir;
3194
3195                 Xstrdup_a(imap_dir, folder->account->imap_dir, {return NULL;});
3196                 strtailchomp(imap_dir, '/');
3197                 dirpath = g_strconcat(imap_dir, "/", name, NULL);
3198         } else
3199                 dirpath = g_strdup(name);
3200
3201
3202
3203         /* keep trailing directory separator to create a folder that contains
3204            sub folder */
3205         imap_path = imap_utf8_to_modified_utf7(dirpath, FALSE);
3206
3207         strtailchomp(dirpath, '/');
3208         Xstrdup_a(new_name, name, {
3209                 g_free(dirpath);
3210                 g_free(imap_path);
3211                 return NULL;});
3212
3213         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), imap_path, &ok);
3214         if (is_fatal(ok)) {
3215                 g_free(imap_path);
3216                 return NULL;
3217         }
3218         imap_path_separator_subst(imap_path, separator);
3219         /* remove trailing / for display */
3220         strtailchomp(new_name, '/');
3221
3222         if (strcasecmp(dirpath, "INBOX") != 0) {
3223                 GPtrArray *argbuf;
3224                 int r;
3225                 clist * lep_list;
3226
3227                 argbuf = g_ptr_array_new();
3228                 r = imap_threaded_list(folder, "", imap_path, &lep_list);
3229                 if (r != MAILIMAP_NO_ERROR) {
3230                         imap_handle_error(SESSION(session), NULL, r);
3231                         log_warning(LOG_PROTOCOL, _("can't create mailbox: LIST failed\n"));
3232                         g_free(imap_path);
3233                         g_free(dirpath);
3234                         ptr_array_free_strings(argbuf);
3235                         g_ptr_array_free(argbuf, TRUE);
3236                         return NULL;
3237                 }
3238
3239                 if (clist_count(lep_list) > 0)
3240                         exist = TRUE;
3241                 mailimap_list_result_free(lep_list);
3242                 lep_list = NULL;
3243                 if (!exist) {
3244                         ok = imap_cmd_create(session, imap_path);
3245                         if (ok != MAILIMAP_NO_ERROR) {
3246                                 log_warning(LOG_PROTOCOL, _("can't create mailbox\n"));
3247                                 g_free(imap_path);
3248                                 g_free(dirpath);
3249                                 return NULL;
3250                         }
3251                         r = imap_threaded_list(folder, "", imap_path, &lep_list);
3252                         if (r == MAILIMAP_NO_ERROR) {
3253                                 GSList *item_list = imap_list_from_lep(IMAP_FOLDER(folder),
3254                                                lep_list, dirpath, TRUE);
3255                                 if (item_list) {
3256                                         FolderItem *cur_item = FOLDER_ITEM(item_list->data);
3257                                         no_select = cur_item->no_select;
3258                                         no_sub = cur_item->no_sub;
3259                                         g_slist_free(item_list);
3260                                 }
3261                                 mailimap_list_result_free(lep_list);
3262                         } else {
3263                                 imap_handle_error(SESSION(session), NULL, r);
3264                         }
3265                 }
3266                 imap_threaded_subscribe(folder, imap_path, TRUE);
3267         } else {
3268                 clist *lep_list;
3269                 int r;
3270                 /* just get flags */
3271                 r = imap_threaded_list(folder, "", "INBOX", &lep_list);
3272                 if (r == MAILIMAP_NO_ERROR) {
3273                         GSList *item_list = imap_list_from_lep(IMAP_FOLDER(folder),
3274                                        lep_list, dirpath, TRUE);
3275                         if (item_list) {
3276                                 FolderItem *cur_item = FOLDER_ITEM(item_list->data);
3277                                 no_select = cur_item->no_select;
3278                                 no_sub = cur_item->no_sub;
3279                                 g_slist_free(item_list);
3280                         }
3281                         mailimap_list_result_free(lep_list);
3282                 } else {
3283                         imap_handle_error(SESSION(session), NULL, r);
3284                 }
3285         }
3286
3287         new_item = folder_item_new(folder, new_name, dirpath);
3288         new_item->no_select = no_select;
3289         new_item->no_sub = no_sub;
3290         folder_item_append(parent, new_item);
3291         g_free(imap_path);
3292         g_free(dirpath);
3293
3294         dirpath = folder_item_get_path(new_item);
3295         if (!is_dir_exist(dirpath))
3296                 make_dir_hier(dirpath);
3297         g_free(dirpath);
3298
3299         if (exist) {
3300                 /* folder existed, scan it */
3301                 imap_scan_required(folder, new_item);
3302                 folder_item_scan_full(new_item, FALSE);
3303         }
3304
3305         return new_item;
3306 }
3307
3308 static gint imap_rename_folder(Folder *folder, FolderItem *item,
3309                                const gchar *name)
3310 {
3311         gchar *dirpath;
3312         gchar *newpath;
3313         gchar *real_oldpath;
3314         gchar *real_newpath;
3315         gchar *paths[2];
3316         gchar *old_cache_dir;
3317         gchar *new_cache_dir;
3318         IMAPSession *session;
3319         gchar separator;
3320         gint ok = MAILIMAP_NO_ERROR;
3321         gint exists, recent, unseen;
3322         guint32 uid_validity;
3323
3324         g_return_val_if_fail(folder != NULL, -1);
3325         g_return_val_if_fail(item != NULL, -1);
3326         g_return_val_if_fail(item->path != NULL, -1);
3327         g_return_val_if_fail(name != NULL, -1);
3328
3329         debug_print("getting session...\n");
3330         session = imap_session_get(folder);
3331         if (!session) {
3332                 return -1;
3333         }
3334
3335         if (strchr(name, imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &ok)) != NULL ||
3336                 is_fatal(ok)) {
3337                 g_warning("New folder name must not contain the namespace "
3338                             "path separator");
3339                 return -1;
3340         }
3341
3342         real_oldpath = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &ok);
3343         if (is_fatal(ok)) {
3344                 g_free(real_oldpath);
3345                 return -1;
3346         }
3347
3348         g_free(session->mbox);
3349         session->mbox = NULL;
3350         session->exists = 0;
3351         session->recent = 0;
3352         session->expunge = 0;
3353         ok = imap_cmd_examine(session, "INBOX",
3354                               &exists, &recent, &unseen, &uid_validity, FALSE);
3355         if (ok != MAILIMAP_NO_ERROR) {
3356                 g_free(real_oldpath);
3357                 return -1;
3358         }
3359
3360         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &ok);
3361         if (is_fatal(ok)) {
3362                 g_free(real_oldpath);
3363                 return -1;
3364         }
3365         if (strchr(item->path, '/')) {
3366                 dirpath = g_path_get_dirname(item->path);
3367                 newpath = g_strconcat(dirpath, "/", name, NULL);
3368                 g_free(dirpath);
3369         } else
3370                 newpath = g_strdup(name);
3371
3372         real_newpath = imap_utf8_to_modified_utf7(newpath, FALSE);
3373         imap_path_separator_subst(real_newpath, separator);
3374
3375         ok = imap_cmd_rename(session, real_oldpath, real_newpath);
3376         if (ok != MAILIMAP_NO_ERROR) {
3377                 log_warning(LOG_PROTOCOL, _("can't rename mailbox: %s to %s\n"),
3378                             real_oldpath, real_newpath);
3379                 g_free(real_oldpath);
3380                 g_free(newpath);
3381                 g_free(real_newpath);
3382                 return -1;
3383         }
3384         g_free(item->name);
3385         item->name = g_strdup(name);
3386
3387         old_cache_dir = folder_item_get_path(item);
3388
3389         paths[0] = g_strdup(item->path);
3390         paths[1] = newpath;
3391         g_node_traverse(item->node, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
3392                         imap_rename_folder_func, paths);
3393
3394         if (is_dir_exist(old_cache_dir)) {
3395                 new_cache_dir = folder_item_get_path(item);
3396                 if (g_rename(old_cache_dir, new_cache_dir) < 0) {
3397                         FILE_OP_ERROR(old_cache_dir, "rename");
3398                 }
3399                 g_free(new_cache_dir);
3400         }
3401
3402         g_free(old_cache_dir);
3403         g_free(paths[0]);
3404         g_free(newpath);
3405         g_free(real_oldpath);
3406         g_free(real_newpath);
3407         return 0;
3408 }
3409
3410 gint imap_subscribe(Folder *folder, FolderItem *item, gchar *rpath, gboolean sub)
3411 {
3412         gchar *path;
3413         gint r = MAILIMAP_NO_ERROR;
3414         IMAPSession *session;
3415         debug_print("getting session...\n");
3416
3417         session = imap_session_get(folder);
3418         if (!session) {
3419                 return -1;
3420         }
3421         if (item && item->path) {
3422                 path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &r);
3423                 if (!path)
3424                         return -1;
3425                 if (is_fatal(r)) {
3426                         g_free(path);
3427                         return -1;
3428                 }
3429                 if (!strcasecmp(path, "INBOX") && sub == FALSE) {
3430                         g_free(path);
3431                         return -1;
3432                 }
3433                 debug_print("%ssubscribing %s\n", sub?"":"un", path);
3434                 r = imap_threaded_subscribe(folder, path, sub);
3435                 g_free(path);
3436         } else if (rpath) {
3437                 r = imap_threaded_subscribe(folder, rpath, sub);
3438         } else
3439                 return -1;
3440         return r;
3441 }
3442
3443 static gint imap_remove_folder_real(Folder *folder, FolderItem *item)
3444 {
3445         gint ok = MAILIMAP_NO_ERROR;
3446         IMAPSession *session;
3447         gchar *path;
3448         gchar *cache_dir;
3449         gboolean selected_folder;
3450
3451         g_return_val_if_fail(folder != NULL, -1);
3452         g_return_val_if_fail(item != NULL, -1);
3453         g_return_val_if_fail(item->path != NULL, -1);
3454
3455         debug_print("getting session...\n");
3456         session = imap_session_get(folder);
3457         if (!session) {
3458                 return -1;
3459         }
3460         path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &ok);
3461         if (is_fatal(ok)) {
3462                 g_free(path);
3463                 return -1;
3464         }
3465         imap_threaded_subscribe(folder, path, FALSE);
3466
3467         selected_folder = (session->mbox != NULL) &&
3468                           (!strcmp(session->mbox, item->path));
3469         if (selected_folder) {
3470                 ok = imap_cmd_close(session);
3471                 if (ok != MAILIMAP_NO_ERROR) {
3472                         debug_print("close err %d\n", ok);
3473                         return ok;
3474                 }
3475         }
3476         ok = imap_cmd_delete(session, path);
3477         if (ok != MAILIMAP_NO_ERROR && !is_fatal(ok)) {
3478                 gchar *tmp = NULL;
3479
3480                 ok = MAILIMAP_NO_ERROR;
3481                 tmp = g_strdup_printf("%s%c", path,
3482                                 imap_get_path_separator(session, IMAP_FOLDER(folder), path, &ok));
3483                 g_free(path);
3484                 path = tmp;
3485                 if (!is_fatal(ok))
3486                         ok = imap_cmd_delete(session, path);
3487         }
3488
3489         if (ok != MAILIMAP_NO_ERROR) {
3490                 log_warning(LOG_PROTOCOL, _("can't delete mailbox\n"));
3491                 g_free(path);
3492                 return -1;
3493         }
3494
3495         g_free(path);
3496         cache_dir = folder_item_get_path(item);
3497         if (is_dir_exist(cache_dir) && remove_dir_recursive(cache_dir) < 0)
3498                 g_warning("can't remove directory '%s'", cache_dir);
3499         g_free(cache_dir);
3500         folder_item_remove(item);
3501         return 0;
3502 }
3503
3504 static gint imap_remove_folder(Folder *folder, FolderItem *item)
3505 {
3506         GNode *node, *next;
3507
3508         g_return_val_if_fail(item != NULL, -1);
3509         g_return_val_if_fail(item->folder != NULL, -1);
3510         g_return_val_if_fail(item->node != NULL, -1);
3511
3512         node = item->node->children;
3513         while (node != NULL) {
3514                 next = node->next;
3515                 if (imap_remove_folder(folder, FOLDER_ITEM(node->data)) < 0)
3516                         return -1;
3517                 node = next;
3518         }
3519         debug_print("IMAP removing %s\n", item->path);
3520
3521         if (imap_remove_all_msg(folder, item) < 0)
3522                 return -1;
3523         return imap_remove_folder_real(folder, item);
3524 }
3525
3526 typedef struct _uncached_data {
3527         IMAPSession *session;
3528         FolderItem *item;
3529         MsgNumberList *numlist;
3530         guint cur;
3531         guint total;
3532         gboolean done;
3533         int ok;
3534 } uncached_data;
3535
3536 static void *imap_get_uncached_messages_thread(void *data)
3537 {
3538         uncached_data *stuff = (uncached_data *)data;
3539         IMAPSession *session = stuff->session;
3540         FolderItem *item = stuff->item;
3541         MsgNumberList *numlist = stuff->numlist;
3542         GSList *newlist = NULL;
3543         GSList *llast = NULL;
3544         GSList *seq_list, *cur;
3545         gboolean got_alien_tags = FALSE;
3546
3547         debug_print("uncached_messages\n");
3548
3549         if (session == NULL || item == NULL || item->folder == NULL
3550             || FOLDER_CLASS(item->folder) != &imap_class) {
3551                 stuff->done = TRUE;
3552                 return NULL;
3553         }
3554
3555         seq_list = imap_get_lep_set_from_numlist(IMAP_FOLDER(item->folder), numlist);
3556         debug_print("get msgs info\n");
3557         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
3558                 struct mailimap_set * imapset;
3559                 unsigned int i;
3560                 int r;
3561                 carray * env_list;
3562                 int count;
3563
3564                 if (session->cancelled)
3565                         break;
3566
3567                 imapset = cur->data;
3568
3569                 r = imap_threaded_fetch_env(session->folder,
3570                                             imapset, &env_list);
3571                 if (r != MAILIMAP_NO_ERROR) {
3572                         imap_handle_error(SESSION(session), NULL, r);
3573                         if (is_fatal(r)) {
3574                                 stuff->ok = r;
3575                                 return NULL;
3576                         }
3577                         continue;
3578                 }
3579
3580                 session_set_access_time(SESSION(session));
3581
3582                 count = 0;
3583                 for(i = 0 ; i < carray_count(env_list) ; i += 2) {
3584                         struct imap_fetch_env_info * info;
3585                         MsgInfo * msginfo;
3586                         GSList *tags = NULL, *cur = NULL;
3587                         info = carray_get(env_list, i);
3588                         tags = carray_get(env_list, i+1);
3589                         msginfo = imap_envelope_from_lep(info, item);
3590                         if (msginfo == NULL) {
3591                                 slist_free_strings_full(tags);
3592                                 continue;
3593                         }
3594                         g_slist_free(msginfo->tags);
3595                         msginfo->tags = NULL;
3596
3597                         for (cur = tags; cur; cur = cur->next) {
3598                                 gchar *real_tag = imap_modified_utf7_to_utf8(cur->data, TRUE);
3599                                 gint id = 0;
3600                                 id = tags_get_id_for_str(real_tag);
3601                                 if (id == -1) {
3602                                         id = tags_add_tag(real_tag);
3603                                         got_alien_tags = TRUE;
3604                                 }
3605                                 if (!g_slist_find(msginfo->tags, GINT_TO_POINTER(id))) {
3606                                         msginfo->tags = g_slist_prepend(
3607                                                         msginfo->tags,
3608                                                         GINT_TO_POINTER(id));
3609                                 }
3610                                 g_free(real_tag);
3611                         }
3612                         if (msginfo->tags)
3613                                 msginfo->tags = g_slist_reverse(msginfo->tags);
3614                         slist_free_strings_full(tags);
3615                         msginfo->folder = item;
3616                         if (!newlist)
3617                                 llast = newlist = g_slist_append(newlist, msginfo);
3618                         else {
3619                                 llast = g_slist_append(llast, msginfo);
3620                                 llast = llast->next;
3621                         }
3622                         count ++;
3623                 }
3624
3625                 imap_fetch_env_free(env_list);
3626         }
3627
3628         if (got_alien_tags) {
3629                 tags_write_tags();
3630                 main_window_reflect_tags_changes(mainwindow_get_mainwindow());
3631         }
3632
3633         imap_lep_set_free(seq_list);
3634
3635         session_set_access_time(SESSION(session));
3636         stuff->done = TRUE;
3637         return newlist;
3638 }
3639
3640 #define MAX_MSG_NUM 50
3641
3642 static GSList *imap_get_uncached_messages(IMAPSession *session,
3643                                         FolderItem *item,
3644                                         MsgNumberList *numlist,
3645                                         int *r)
3646 {
3647         GSList *result = NULL;
3648         GSList * cur;
3649         uncached_data *data = g_new0(uncached_data, 1);
3650
3651         cur = numlist;
3652         data->total = g_slist_length(numlist);
3653         data->ok = MAILIMAP_NO_ERROR;
3654         debug_print("messages list : %i\n", data->total);
3655
3656         while (cur != NULL) {
3657                 GSList * partial_result;
3658                 int count;
3659                 GSList * newlist;
3660                 GSList * llast;
3661
3662                 llast = NULL;
3663                 count = 0;
3664                 newlist = NULL;
3665                 while (count < MAX_MSG_NUM) {
3666                         void * p;
3667
3668                         p = cur->data;
3669
3670                         if (newlist == NULL)
3671                                 llast = newlist = g_slist_append(newlist, p);
3672                         else {
3673                                 llast = g_slist_append(llast, p);
3674                                 llast = llast->next;
3675                         }
3676                         count ++;
3677
3678                         cur = cur->next;
3679                         if (cur == NULL)
3680                                 break;
3681                 }
3682
3683                 data->done = FALSE;
3684                 data->session = session;
3685                 data->item = item;
3686                 data->numlist = newlist;
3687                 data->cur += count;
3688
3689                 if (prefs_common.work_offline &&
3690                     !inc_offline_should_override(FALSE,
3691                         _("Claws Mail needs network access in order "
3692                           "to access the IMAP server."))) {
3693                         g_free(data);
3694                         return NULL;
3695                 }
3696
3697                 partial_result =
3698                         (GSList *)imap_get_uncached_messages_thread(data);
3699                 *r = data->ok;
3700                 if (data->ok != MAILIMAP_NO_ERROR) {
3701                         goto bail;
3702                 }
3703                 statusbar_progress_all(data->cur,data->total, 1);
3704
3705                 g_slist_free(newlist);
3706
3707                 result = g_slist_concat(result, partial_result);
3708         }
3709 bail:
3710         g_free(data);
3711
3712         statusbar_progress_all(0,0,0);
3713         statusbar_pop_all();
3714
3715         return result;
3716 }
3717
3718 static void imap_delete_all_cached_messages(FolderItem *item)
3719 {
3720         gchar *dir;
3721
3722         g_return_if_fail(item != NULL);
3723         g_return_if_fail(item->folder != NULL);
3724         g_return_if_fail(FOLDER_CLASS(item->folder) == &imap_class);
3725
3726         debug_print("Deleting all cached messages...\n");
3727
3728         dir = folder_item_get_path(item);
3729         if (is_dir_exist(dir))
3730                 remove_all_numbered_files(dir);
3731         g_free(dir);
3732
3733         debug_print("done.\n");
3734 }
3735
3736 gchar imap_get_path_separator_for_item(FolderItem *item)
3737 {
3738         Folder *folder = NULL;
3739         IMAPFolder *imap_folder = NULL;
3740         IMAPSession *session = NULL;
3741         gchar result = '/';
3742         gint ok = MAILIMAP_NO_ERROR;
3743         if (!item)
3744                 return '/';
3745         folder = item->folder;
3746
3747         if (!folder)
3748                 return '/';
3749
3750         imap_folder = IMAP_FOLDER(folder);
3751
3752         debug_print("getting session...\n");
3753         session = imap_session_get(FOLDER(folder));
3754         result = imap_get_path_separator(session, imap_folder, item->path, &ok);
3755         return result;
3756 }
3757
3758 static gchar imap_refresh_path_separator(IMAPSession *session, IMAPFolder *folder, const gchar *subfolder, gint *ok)
3759 {
3760         clist * lep_list;
3761         int r;
3762         gchar separator = '\0';
3763
3764         g_return_val_if_fail(session != NULL, '/');
3765         r = imap_threaded_list((Folder *)folder, "", subfolder, &lep_list);
3766
3767         if (r != MAILIMAP_NO_ERROR) {
3768                 imap_handle_error(SESSION(session), NULL, r);
3769                 log_warning(LOG_PROTOCOL, _("LIST failed\n"));
3770                 *ok = r;
3771                 return '\0';
3772         }
3773
3774         if (lep_list != NULL && clist_count(lep_list) > 0) {
3775                 clistiter * iter = clist_begin(lep_list);
3776                 struct mailimap_mailbox_list * mb;
3777                 mb = clist_content(iter);
3778
3779                 separator = mb->mb_delimiter;
3780                 debug_print("got separator: %c\n", folder->last_seen_separator);
3781         }
3782         *ok = MAILIMAP_NO_ERROR;
3783         mailimap_list_result_free(lep_list);
3784         return separator;
3785 }
3786
3787 static gchar imap_get_path_separator(IMAPSession *session, IMAPFolder *folder, const gchar *path, gint *ok)
3788 {
3789         gchar separator = '/';
3790         *ok = MAILIMAP_NO_ERROR;
3791         if (folder->last_seen_separator == 0) {
3792                 folder->last_seen_separator = imap_refresh_path_separator(session, folder, "", ok);
3793         }
3794
3795         if (folder->last_seen_separator == 0) {
3796                 folder->last_seen_separator = imap_refresh_path_separator(session, folder, "INBOX", ok);
3797         }
3798
3799         if (folder->last_seen_separator != 0) {
3800                 debug_print("using separator: %c\n", folder->last_seen_separator);
3801                 return folder->last_seen_separator;
3802         }
3803
3804         return separator;
3805 }
3806
3807 static gchar *imap_get_real_path(IMAPSession *session, IMAPFolder *folder, const gchar *path, gint *ok)
3808 {
3809         gchar *real_path = NULL;
3810         gchar separator;
3811
3812         g_return_val_if_fail(folder != NULL, NULL);
3813         g_return_val_if_fail(path != NULL, NULL);
3814
3815         *ok = MAILIMAP_NO_ERROR;
3816
3817         real_path = imap_utf8_to_modified_utf7(path, FALSE);
3818         separator = imap_get_path_separator(session, folder, path, ok);
3819         if (*ok == MAILIMAP_NO_ERROR)
3820                 imap_path_separator_subst(real_path, separator);
3821
3822         return real_path;
3823 }
3824
3825 static gint imap_set_message_flags(IMAPSession *session,
3826                                    IMAPFolderItem *item,
3827                                    MsgNumberList *numlist,
3828                                    IMAPFlags flags,
3829                                    GSList *tags,
3830                                    gboolean is_set)
3831 {
3832         gint ok = 0;
3833         GSList *seq_list;
3834         GSList * cur;
3835         gint total = 0;
3836         IMAPFolder *folder = NULL;
3837         GSList *sorted_list = NULL;
3838
3839         if (numlist == NULL || session == NULL)
3840                 return MAILIMAP_ERROR_BAD_STATE;
3841
3842         folder = IMAP_FOLDER(session->folder);
3843
3844         sorted_list = g_slist_copy(numlist);
3845         sorted_list = g_slist_sort(sorted_list, g_int_compare);
3846
3847         cur = g_slist_last(sorted_list);
3848
3849         if (cur)
3850                 total = GPOINTER_TO_INT(cur->data);
3851
3852         seq_list = imap_get_lep_set_from_numlist(IMAP_FOLDER(session->folder), sorted_list);
3853
3854         statusbar_print_all(_("Flagging messages..."));
3855
3856         for(cur = seq_list ; cur != NULL ; cur = g_slist_next(cur)) {
3857                 struct mailimap_set * imapset = (struct mailimap_set *)cur->data;
3858                 struct mailimap_set_item *set_item = NULL;
3859
3860                 if (imapset->set_list)
3861                         set_item = clist_content(clist_begin(imapset->set_list));
3862                 else
3863                         continue;
3864
3865                 if (set_item == NULL)
3866                         continue;
3867
3868                 statusbar_progress_all(set_item->set_first, total, 1);
3869
3870                 ok = imap_cmd_store(session, item, imapset,
3871                                     flags, tags, is_set);
3872                 statusbar_progress_all(set_item->set_last, total, 1);
3873                 if (ok != MAILIMAP_NO_ERROR && folder->max_set_size > 20) {
3874                         /* reduce max set size */
3875                         folder->max_set_size /= 2;
3876                 }
3877                 if (ok != MAILIMAP_NO_ERROR && is_fatal(ok)) {
3878                         break;
3879                 }
3880         }
3881
3882         g_slist_free(sorted_list);
3883
3884         statusbar_progress_all(0,0,0);
3885         statusbar_pop_all();
3886
3887         imap_lep_set_free(seq_list);
3888
3889         return ok;
3890 }
3891
3892 typedef struct _select_data {
3893         IMAPSession *session;
3894         gchar *real_path;
3895         gint *exists;
3896         gint *recent;
3897         gint *unseen;
3898         guint32 *uid_validity;
3899         gboolean done;
3900 } select_data;
3901
3902 static gint imap_select(IMAPSession *session, IMAPFolder *folder,
3903                         FolderItem *item,
3904                         gint *exists, gint *recent, gint *unseen,
3905                         guint32 *uid_validity, gint *can_create_flags,
3906                         gboolean block)
3907 {
3908         gchar *real_path;
3909         gint ok = MAILIMAP_NO_ERROR;
3910         gint exists_, recent_, unseen_;
3911         guint32 uid_validity_;
3912         gint can_create_flags_;
3913         const gchar *path = item ? item->path:NULL;
3914
3915         if (!item) {
3916                 return MAILIMAP_ERROR_BAD_STATE;
3917         }
3918
3919         if (!exists && !recent && !unseen && !uid_validity && !can_create_flags) {
3920                 if (session->mbox && strcmp(session->mbox, path) == 0)
3921                         return MAILIMAP_NO_ERROR;
3922         }
3923         if (!exists && !recent && !unseen && !uid_validity && can_create_flags) {
3924                 if (session->mbox && strcmp(session->mbox, path) == 0) {
3925                         if (IMAP_FOLDER_ITEM(item)->can_create_flags != ITEM_CAN_CREATE_FLAGS_UNKNOWN)
3926                                 return MAILIMAP_NO_ERROR;
3927                 }
3928         }
3929         if (!exists)
3930                 exists = &exists_;
3931         if (!recent)
3932                 recent = &recent_;
3933         if (!unseen)
3934                 unseen = &unseen_;
3935         if (!uid_validity)
3936                 uid_validity = &uid_validity_;
3937         if (!can_create_flags)
3938                 can_create_flags = &can_create_flags_;
3939
3940         g_free(session->mbox);
3941         session->mbox = NULL;
3942         session->exists = 0;
3943         session->recent = 0;
3944         session->expunge = 0;
3945
3946         real_path = imap_get_real_path(session, folder, path, &ok);
3947         if (is_fatal(ok)) {
3948                 g_free(real_path);
3949                 return ok;
3950         }
3951         g_slist_free(IMAP_FOLDER_ITEM(item)->ok_flags);
3952         IMAP_FOLDER_ITEM(item)->ok_flags = NULL;
3953         ok = imap_cmd_select(session, real_path,
3954                              exists, recent, unseen, uid_validity, can_create_flags,
3955                              &(IMAP_FOLDER_ITEM(item)->ok_flags), block);
3956         if (ok != MAILIMAP_NO_ERROR) {
3957                 log_warning(LOG_PROTOCOL, _("can't select folder: %s\n"), real_path);
3958         } else {
3959                 session->mbox = g_strdup(path);
3960                 session->folder_content_changed = FALSE;
3961                 session->exists = *exists;
3962                 session->recent = *recent;
3963                 session->expunge = 0;
3964                 session->unseen = *unseen;
3965                 session->uid_validity = *uid_validity;
3966                 debug_print("select: exists %d recent %d expunge %d uid_validity %d can_create_flags %d\n",
3967                         session->exists, session->recent, session->expunge,
3968                         session->uid_validity, *can_create_flags);
3969         }
3970         if (*can_create_flags) {
3971                 IMAP_FOLDER_ITEM(item)->can_create_flags = ITEM_CAN_CREATE_FLAGS;
3972         } else {
3973                 IMAP_FOLDER_ITEM(item)->can_create_flags = ITEM_CANNOT_CREATE_FLAGS;
3974         }
3975         g_free(real_path);
3976
3977         return ok;
3978 }
3979
3980 static gint imap_status(IMAPSession *session, IMAPFolder *folder,
3981                         const gchar *path, IMAPFolderItem *item,
3982                         gint *messages,
3983                         guint32 *uid_next, guint32 *uid_validity,
3984                         gint *unseen, gboolean block)
3985 {
3986         int r = MAILIMAP_NO_ERROR;
3987         clistiter * iter;
3988         struct mailimap_mailbox_data_status * data_status;
3989         int got_values;
3990         gchar *real_path;
3991         guint mask = 0;
3992
3993         real_path = imap_get_real_path(session, folder, path, &r);
3994         if (is_fatal(r)) {
3995                 g_free(real_path);
3996                 return r;
3997         }
3998         if (messages) {
3999                 mask |= 1 << 0;
4000                 *messages = 0;
4001         }
4002         if (uid_next) {
4003                 mask |= 1 << 2;
4004                 *uid_next = 0;
4005         }
4006         if (uid_validity) {
4007                 mask |= 1 << 3;
4008                 *uid_validity = 0;
4009         }
4010         if (unseen) {
4011                 mask |= 1 << 4;
4012                 *unseen = 0;
4013         }
4014
4015         if (session->mbox != NULL &&
4016             !strcmp(session->mbox, item->item.path)) {
4017                 r = imap_cmd_close(session);
4018                 if (r != MAILIMAP_NO_ERROR) {
4019                         debug_print("close err %d\n", r);
4020                         g_free(real_path);
4021                         return r;
4022                 }
4023         }
4024
4025         r = imap_threaded_status(FOLDER(folder), real_path,
4026                 &data_status, mask);
4027
4028         g_free(real_path);
4029         if (r != MAILIMAP_NO_ERROR) {
4030                 imap_handle_error(SESSION(session), NULL, r);
4031                 debug_print("status err %d\n", r);
4032                 return r;
4033         }
4034
4035         if (data_status == NULL || data_status->st_info_list == NULL) {
4036                 debug_print("data_status %p\n", data_status);
4037                 if (data_status) {
4038                         debug_print("data_status->st_info_list %p\n", data_status->st_info_list);
4039                         mailimap_mailbox_data_status_free(data_status);
4040                 }
4041                 return MAILIMAP_ERROR_BAD_STATE;
4042         }
4043
4044         got_values = 0;
4045         if (data_status->st_info_list) {
4046                 for(iter = clist_begin(data_status->st_info_list) ; iter != NULL ;
4047                     iter = clist_next(iter)) {
4048                         struct mailimap_status_info * info;
4049
4050                         info = clist_content(iter);
4051                         switch (info->st_att) {
4052                         case MAILIMAP_STATUS_ATT_MESSAGES:
4053                                 if (messages) {
4054                                         * messages = info->st_value;
4055                                         got_values |= 1 << 0;
4056                                 }
4057                                 break;
4058
4059                         case MAILIMAP_STATUS_ATT_UIDNEXT:
4060                                 if (uid_next) {
4061                                         * uid_next = info->st_value;
4062                                         got_values |= 1 << 2;
4063                                 }
4064                                 break;
4065
4066                         case MAILIMAP_STATUS_ATT_UIDVALIDITY:
4067                                 if (uid_validity) {
4068                                         * uid_validity = info->st_value;
4069                                         got_values |= 1 << 3;
4070                                 }
4071                                 break;
4072
4073                         case MAILIMAP_STATUS_ATT_UNSEEN:
4074                                 if (unseen) {
4075                                         * unseen = info->st_value;
4076                                         got_values |= 1 << 4;
4077                                 }
4078                                 break;
4079                         }
4080                 }
4081         }
4082         mailimap_mailbox_data_status_free(data_status);
4083
4084         if (got_values != mask) {
4085                 g_warning("status: incomplete values received (%d)", got_values);
4086         }
4087         return MAILIMAP_NO_ERROR;
4088 }
4089
4090 static void imap_free_capabilities(IMAPSession *session)
4091 {
4092         slist_free_strings_full(session->capability);
4093         session->capability = NULL;
4094 }
4095
4096 /* low-level IMAP4rev1 commands */
4097
4098 static gint imap_cmd_login(IMAPSession *session,
4099                            const gchar *user, const gchar *pass,
4100                            const gchar *type)
4101 {
4102         int r;
4103         gint ok;
4104
4105         if (!strcmp(type, "plaintext") && imap_has_capability(session, "LOGINDISABLED")) {
4106                 gint ok = MAILIMAP_ERROR_BAD_STATE;
4107                 if (imap_has_capability(session, "STARTTLS")) {
4108 #ifdef USE_GNUTLS
4109                         log_warning(LOG_PROTOCOL, _("Server requires TLS to log in.\n"));
4110                         ok = imap_cmd_starttls(session);
4111                         if (ok != MAILIMAP_NO_ERROR) {
4112                                 log_warning(LOG_PROTOCOL, _("Can't start TLS session.\n"));
4113                                 return ok;
4114                         } else {
4115                                 /* refresh capas */
4116                                 imap_free_capabilities(session);
4117                                 if ((r = imap_get_capabilities(session)) != MAILIMAP_NO_ERROR) {
4118                                         imap_handle_error(SESSION(session), NULL, r);
4119                                         log_warning(LOG_PROTOCOL, _("Can't refresh capabilities.\n"));
4120                                         return r;
4121                                 }
4122                         }
4123 #else
4124                         log_error(LOG_PROTOCOL, _("Connection to %s failed: "
4125                                         "server requires TLS, but Claws Mail "
4126                                         "has been compiled without TLS "
4127                                         "support.\n"),
4128                                         SESSION(session)->server);
4129                         return MAILIMAP_ERROR_LOGIN;
4130 #endif
4131                 } else {
4132                         log_error(LOG_PROTOCOL, _("Server logins are disabled.\n"));
4133                         return MAILIMAP_ERROR_LOGIN;
4134                 }
4135         }
4136
4137         log_print(LOG_PROTOCOL, "IMAP4> Logging %s to %s using %s\n",
4138                         user,
4139                         SESSION(session)->server,
4140                         type);
4141         r = imap_threaded_login(session->folder, user, pass, type);
4142         if (r != MAILIMAP_NO_ERROR) {
4143                 imap_handle_error(SESSION(session), NULL, r);
4144                 log_print(LOG_PROTOCOL, "IMAP4< Error logging in to %s\n",
4145                                 SESSION(session)->server);
4146                 ok = r;
4147         } else {
4148                 log_print(LOG_PROTOCOL, "IMAP4< Login to %s successful\n",
4149                                 SESSION(session)->server);
4150                 ok = MAILIMAP_NO_ERROR;
4151         }
4152         return ok;
4153 }
4154
4155 static gint imap_cmd_noop(IMAPSession *session)
4156 {
4157         int r;
4158         unsigned int exists, recent, expunge, unseen, uidnext, uidval;
4159
4160         r = imap_threaded_noop(session->folder, &exists, &recent, &expunge, &unseen, &uidnext, &uidval);
4161         if (r != MAILIMAP_NO_ERROR) {
4162                 imap_handle_error(SESSION(session), NULL, r);
4163                 debug_print("noop err %d\n", r);
4164                 return r;
4165         }
4166
4167         if ((exists && exists != session->exists)
4168          || (recent && recent != session->recent)
4169          || (expunge && expunge != session->expunge)
4170          || (unseen && unseen != session->unseen)) {
4171                 session->folder_content_changed = TRUE;
4172         }
4173         if (uidnext != 0 && uidnext != session->uid_next) {
4174                 session->uid_next = uidnext;
4175                 session->folder_content_changed = TRUE;
4176         }
4177         if (uidval != 0 && uidval != session->uid_validity) {
4178                 session->uid_validity = uidval;
4179                 session->folder_content_changed = TRUE;
4180         }
4181
4182         session->exists = exists;
4183         session->recent = recent;
4184         session->expunge = expunge;
4185         session->unseen = unseen;
4186
4187         session_set_access_time(SESSION(session));
4188
4189         return MAILIMAP_NO_ERROR;
4190 }
4191
4192 #ifdef USE_GNUTLS
4193 static gint imap_cmd_starttls(IMAPSession *session)
4194 {
4195         int r;
4196
4197         r = imap_threaded_starttls(session->folder,
4198                 SESSION(session)->server, SESSION(session)->port);
4199         if (r != MAILIMAP_NO_ERROR) {
4200                 imap_handle_error(SESSION(session), NULL, r);
4201                 debug_print("starttls err %d\n", r);
4202                 return r;
4203         }
4204         return MAILIMAP_NO_ERROR;
4205 }
4206 #endif
4207
4208 static gint imap_cmd_select(IMAPSession *session, const gchar *folder,
4209                             gint *exists, gint *recent, gint *unseen,
4210                             guint32 *uid_validity, gint *can_create_flags,
4211                             GSList **ok_flags, gboolean block)
4212 {
4213         int r;
4214
4215         r = imap_threaded_select(session->folder, folder,
4216                                  exists, recent, unseen, uid_validity, can_create_flags, ok_flags);
4217         if (r != MAILIMAP_NO_ERROR) {
4218                 imap_handle_error(SESSION(session), NULL, r);
4219                 debug_print("select err %d\n", r);
4220                 return r;
4221         }
4222         return MAILIMAP_NO_ERROR;
4223 }
4224
4225 static gint imap_cmd_close(IMAPSession *session)
4226 {
4227         int r;
4228
4229         r = imap_threaded_close(session->folder);
4230         if (r != MAILIMAP_NO_ERROR) {
4231                 imap_handle_error(SESSION(session), NULL, r);
4232                 debug_print("close err %d\n", r);
4233                 return r;
4234         }
4235         g_free(session->mbox);
4236         session->mbox = NULL;
4237         session->exists = 0;
4238         session->recent = 0;
4239         session->expunge = 0;
4240         return MAILIMAP_NO_ERROR;
4241 }
4242
4243 static gint imap_cmd_examine(IMAPSession *session, const gchar *folder,
4244                              gint *exists, gint *recent, gint *unseen,
4245                              guint32 *uid_validity, gboolean block)
4246 {
4247         int r;
4248
4249         r = imap_threaded_examine(session->folder, folder,
4250                                   exists, recent, unseen, uid_validity);
4251         if (r != MAILIMAP_NO_ERROR) {
4252                 imap_handle_error(SESSION(session), NULL, r);
4253                 debug_print("examine err %d\n", r);
4254
4255                 return r;
4256         }
4257         return MAILIMAP_NO_ERROR;
4258 }
4259
4260 static gint imap_cmd_create(IMAPSession *session, const gchar *folder)
4261 {
4262         int r;
4263
4264         r = imap_threaded_create(session->folder, folder);
4265         if (r != MAILIMAP_NO_ERROR) {
4266                 imap_handle_error(SESSION(session), NULL, r);
4267                 return r;
4268         }
4269
4270         return MAILIMAP_NO_ERROR;
4271 }
4272
4273 static gint imap_cmd_rename(IMAPSession *session, const gchar *old_folder,
4274                             const gchar *new_folder)
4275 {
4276         int r;
4277
4278         r = imap_threaded_rename(session->folder, old_folder,
4279                                  new_folder);
4280         if (r != MAILIMAP_NO_ERROR) {
4281                 imap_handle_error(SESSION(session), NULL, r);
4282                 return r;
4283         }
4284
4285         return MAILIMAP_NO_ERROR;
4286 }
4287
4288 static gint imap_cmd_delete(IMAPSession *session, const gchar *folder)
4289 {
4290         int r;
4291
4292
4293         r = imap_threaded_delete(session->folder, folder);
4294         if (r != MAILIMAP_NO_ERROR) {
4295                 imap_handle_error(SESSION(session), NULL, r);
4296                 return r;
4297         }
4298
4299         return MAILIMAP_NO_ERROR;
4300 }
4301
4302 typedef struct _fetch_data {
4303         IMAPSession *session;
4304         guint32 uid;
4305         const gchar *filename;
4306         gboolean headers;
4307         gboolean body;
4308         gboolean done;
4309 } fetch_data;
4310
4311 static void *imap_cmd_fetch_thread(void *data)
4312 {
4313         fetch_data *stuff = (fetch_data *)data;
4314         IMAPSession *session = stuff->session;
4315         guint32 uid = stuff->uid;
4316         const gchar *filename = stuff->filename;
4317         int r;
4318
4319         if (stuff->body) {
4320                 r = imap_threaded_fetch_content(session->folder,
4321                                                uid, 1, filename);
4322         }
4323         else {
4324                 r = imap_threaded_fetch_content(session->folder,
4325                                                 uid, 0, filename);
4326         }
4327         if (r != MAILIMAP_NO_ERROR) {
4328                 imap_handle_error(SESSION(session), NULL, r);
4329                 debug_print("fetch err %d\n", r);
4330                 return GINT_TO_POINTER(r);
4331         }
4332         return GINT_TO_POINTER(MAILIMAP_NO_ERROR);
4333 }
4334
4335 static gint imap_cmd_fetch(IMAPSession *session, guint32 uid,
4336                                 const gchar *filename, gboolean headers,
4337                                 gboolean body)
4338 {
4339         fetch_data *data = g_new0(fetch_data, 1);
4340         int result = 0;
4341         data->done = FALSE;
4342         data->session = session;
4343         data->uid = uid;
4344         data->filename = filename;
4345         data->headers = headers;
4346         data->body = body;
4347
4348         if (prefs_common.work_offline &&
4349             !inc_offline_should_override(FALSE,
4350                 _("Claws Mail needs network access in order "
4351                   "to access the IMAP server."))) {
4352                 g_free(data);
4353                 return -1;
4354         }
4355         statusbar_print_all(_("Fetching message..."));
4356         result = GPOINTER_TO_INT(imap_cmd_fetch_thread(data));
4357         statusbar_pop_all();
4358         g_free(data);
4359         return result;
4360 }
4361
4362
4363 static gint imap_cmd_append(IMAPSession *session,
4364                             IMAPFolderItem *item,
4365                             const gchar *destfolder,
4366                             const gchar *file, IMAPFlags flags,
4367                             guint32 *new_uid)
4368 {
4369         struct mailimap_flag_list * flag_list;
4370         int r;
4371
4372         cm_return_val_if_fail(file != NULL, MAILIMAP_ERROR_BAD_STATE);
4373
4374         flag_list = imap_flag_to_lep(item, flags, NULL);
4375         lock_session(session);
4376         r = imap_threaded_append(session->folder, destfolder,
4377                          file, flag_list, (int *)new_uid);
4378         mailimap_flag_list_free(flag_list);
4379
4380         if (r != MAILIMAP_NO_ERROR) {
4381                 imap_handle_error(SESSION(session), NULL, r);
4382                 debug_print("append err %d\n", r);
4383                 return r;
4384         }
4385
4386         unlock_session(session);
4387
4388         return MAILIMAP_NO_ERROR;
4389 }
4390
4391 static gint imap_cmd_copy(IMAPSession *session, struct mailimap_set * set,
4392                           const gchar *destfolder,
4393                           struct mailimap_set **source, struct mailimap_set **dest)
4394 {
4395         int r;
4396
4397         g_return_val_if_fail(session != NULL, MAILIMAP_ERROR_BAD_STATE);
4398         g_return_val_if_fail(set != NULL, MAILIMAP_ERROR_BAD_STATE);
4399         g_return_val_if_fail(destfolder != NULL, MAILIMAP_ERROR_BAD_STATE);
4400
4401         r = imap_threaded_copy(session->folder, set, destfolder, source, dest);
4402         if (r != MAILIMAP_NO_ERROR) {
4403                 imap_handle_error(SESSION(session), NULL, r);
4404                 return r;
4405         }
4406
4407         return MAILIMAP_NO_ERROR;
4408 }
4409
4410 static gint imap_cmd_store(IMAPSession *session,
4411                            IMAPFolderItem *item,
4412                            struct mailimap_set * set,
4413                            IMAPFlags flags, GSList *tags, int do_add)
4414 {
4415         int r;
4416         struct mailimap_flag_list * flag_list = NULL;
4417         struct mailimap_store_att_flags * store_att_flags;
4418
4419         flag_list = imap_flag_to_lep(item, flags, tags);
4420
4421         if (do_add)
4422                 store_att_flags =
4423                         mailimap_store_att_flags_new_add_flags_silent(flag_list);
4424         else
4425                 store_att_flags =
4426                         mailimap_store_att_flags_new_remove_flags_silent(flag_list);
4427
4428         r = imap_threaded_store(session->folder, set, store_att_flags);
4429         mailimap_store_att_flags_free(store_att_flags);
4430         if (r != MAILIMAP_NO_ERROR) {
4431                 imap_handle_error(SESSION(session), NULL, r);
4432                 return r;
4433         }
4434
4435         return MAILIMAP_NO_ERROR;
4436 }
4437
4438 static gint imap_cmd_expunge(IMAPSession *session)
4439 {
4440         int r;
4441
4442         if (prefs_common.work_offline &&
4443             !inc_offline_should_override(FALSE,
4444                 _("Claws Mail needs network access in order "
4445                   "to access the IMAP server."))) {
4446                 return -1;
4447         }
4448
4449         r = imap_threaded_expunge(session->folder);
4450         if (r != MAILIMAP_NO_ERROR) {
4451                 imap_handle_error(SESSION(session), NULL, r);
4452                 return r;
4453         }
4454
4455         return MAILIMAP_NO_ERROR;
4456 }
4457
4458 gint imap_expunge(Folder *folder, FolderItem *item)
4459 {
4460         IMAPSession *session = imap_session_get(folder);
4461         if (session == NULL)
4462                 return -1;
4463
4464         return imap_cmd_expunge(session);
4465 }
4466
4467 static void imap_path_separator_subst(gchar *str, gchar separator)
4468 {
4469         gchar *p;
4470         gboolean in_escape = FALSE;
4471
4472         if (!separator || separator == '/') return;
4473
4474         for (p = str; *p != '\0'; p++) {
4475                 if (*p == '/' && !in_escape)
4476                         *p = separator;
4477                 else if (*p == '&' && *(p + 1) != '-' && !in_escape)
4478                         in_escape = TRUE;
4479                 else if (*p == '-' && in_escape)
4480                         in_escape = FALSE;
4481         }
4482 }
4483
4484 static gboolean imap_rename_folder_func(GNode *node, gpointer data)
4485 {
4486         FolderItem *item = node->data;
4487         gchar **paths = data;
4488         const gchar *oldpath = paths[0];
4489         const gchar *newpath = paths[1];
4490         gchar *real_oldpath, *real_newpath;
4491         gchar *base;
4492         gchar *new_itempath;
4493         gint oldpathlen;
4494         IMAPSession *session = imap_session_get(item->folder);
4495         gint ok = MAILIMAP_NO_ERROR;
4496         oldpathlen = strlen(oldpath);
4497         if (strncmp(oldpath, item->path, oldpathlen) != 0) {
4498                 g_warning("path doesn't match: %s, %s", oldpath, item->path);
4499                 return TRUE;
4500         }
4501
4502         base = item->path + oldpathlen;
4503         while (*base == '/') base++;
4504         if (*base == '\0')
4505                 new_itempath = g_strdup(newpath);
4506         else
4507                 new_itempath = g_strconcat(newpath, "/", base,
4508                                            NULL);
4509
4510         real_oldpath = imap_get_real_path(session, IMAP_FOLDER(item->folder), item->path, &ok);
4511         g_free(item->path);
4512         item->path = new_itempath;
4513
4514         real_newpath = imap_get_real_path(session, IMAP_FOLDER(item->folder), item->path, &ok);
4515
4516         imap_threaded_subscribe(item->folder, real_oldpath, FALSE);
4517         imap_threaded_subscribe(item->folder, real_newpath, TRUE);
4518
4519         g_free(real_oldpath);
4520         g_free(real_newpath);
4521         return FALSE;
4522 }
4523
4524 static gint get_list_of_uids(IMAPSession *session, Folder *folder, IMAPFolderItem *item, GSList **msgnum_list)
4525 {
4526         GSList *uidlist, *elem;
4527         int r = -1;
4528         clist * lep_uidlist;
4529         gint ok, nummsgs = 0;
4530
4531         if (session == NULL) {
4532                 return -1;
4533         }
4534
4535         ok = imap_select(session, IMAP_FOLDER(folder), FOLDER_ITEM(item),
4536                          NULL, NULL, NULL, NULL, NULL, TRUE);
4537         if (ok != MAILIMAP_NO_ERROR) {
4538                 return -1;
4539         }
4540
4541         g_slist_free(item->uid_list);
4542         item->uid_list = NULL;
4543
4544         uidlist = NULL;
4545
4546         if (folder->account && folder->account->low_bandwidth) {
4547                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SIMPLE,
4548                                 NULL, NULL, NULL, &lep_uidlist);
4549         }
4550
4551         if (r == MAILIMAP_NO_ERROR) {
4552                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
4553                 mailimap_search_result_free(lep_uidlist);
4554         } else {
4555                 carray * lep_uidtab;
4556                 if (r != -1) { /* inited */
4557                         imap_handle_error(SESSION(session), NULL, r);
4558                         if (is_fatal(r))
4559                                 return -1;
4560                 }
4561                 r = imap_threaded_fetch_uid(folder, 1,
4562                                     &lep_uidtab);
4563                 if (r == MAILIMAP_NO_ERROR) {
4564                         uidlist = imap_uid_list_from_lep_tab(lep_uidtab);
4565                         imap_fetch_uid_list_free(lep_uidtab);
4566                 }
4567         }
4568
4569         if (r != MAILIMAP_NO_ERROR) {
4570                 imap_handle_error(SESSION(session), NULL, r);
4571                 return -1;
4572         }
4573
4574         for (elem = uidlist; elem != NULL; elem = g_slist_next(elem)) {
4575                 guint msgnum;
4576
4577                 msgnum = GPOINTER_TO_INT(elem->data);
4578
4579                 *msgnum_list = g_slist_prepend(*msgnum_list, GINT_TO_POINTER(msgnum));
4580                 item->uid_list = g_slist_prepend(item->uid_list, GINT_TO_POINTER(msgnum));
4581                 nummsgs++;
4582         }
4583         g_slist_free(uidlist);
4584
4585         return nummsgs;
4586
4587 }
4588
4589 gint imap_get_num_list(Folder *folder, FolderItem *_item, GSList **msgnum_list, gboolean *old_uids_valid)
4590 {
4591         IMAPFolderItem *item = (IMAPFolderItem *)_item;
4592         IMAPSession *session;
4593         gint nummsgs;
4594         GSList *uidlist = NULL;
4595         gchar *dir;
4596         gint known_list_len = 0;
4597         gchar *path;
4598
4599         debug_print("get_num_list\n");
4600
4601         g_return_val_if_fail(folder != NULL, -1);
4602         g_return_val_if_fail(item != NULL, -1);
4603         g_return_val_if_fail(item->item.path != NULL, -1);
4604         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
4605         g_return_val_if_fail(folder->account != NULL, -1);
4606
4607         known_list_len = g_slist_length(item->uid_list);
4608         if (!item->should_update) {
4609                 debug_print("get_num_list: nothing to update\n");
4610                 *old_uids_valid = TRUE;
4611                 if (known_list_len == item->item.total_msgs
4612                  && known_list_len > 0) {
4613                         *msgnum_list = g_slist_copy(item->uid_list);
4614                         return known_list_len;
4615                 } else {
4616                         debug_print("don't know the list length...\n");
4617                 }
4618         }
4619
4620         if (prefs_common.work_offline &&
4621             !inc_offline_should_override(FALSE,
4622                 _("Claws Mail needs network access in order "
4623                   "to access the IMAP server."))) {
4624                 return -1;
4625         }
4626
4627         path = folder_item_get_path(_item);
4628         if (!is_dir_exist(path)) {
4629                 if(is_file_exist(path))
4630                         claws_unlink(path);
4631                 make_dir_hier(path);
4632         }
4633         g_free(path);
4634
4635         debug_print("getting session...\n");
4636         session = imap_session_get(folder);
4637         g_return_val_if_fail(session != NULL, -1);
4638
4639         lock_session(session);
4640         if (FOLDER_ITEM(item)->path)
4641                 statusbar_print_all(_("Scanning folder %s/%s..."),
4642                                       FOLDER_ITEM(item)->folder->name,
4643                                       FOLDER_ITEM(item)->path);
4644         else
4645                 statusbar_print_all(_("Scanning folder %s..."),
4646                                       FOLDER_ITEM(item)->folder->name);
4647
4648         if (item->should_trash_cache) {
4649                 *old_uids_valid = FALSE;
4650                 debug_print("get_num_list: trashing num list\n");
4651                 debug_print("Freeing imap uid cache\n");
4652                 item->lastuid = 0;
4653                 g_slist_free(item->uid_list);
4654                 item->uid_list = NULL;
4655
4656                 imap_delete_all_cached_messages((FolderItem *)item);
4657         } else {
4658                 debug_print("get_num_list: updating num list\n");
4659                 *old_uids_valid = TRUE;
4660         }
4661
4662         nummsgs = get_list_of_uids(session, folder, item, &uidlist);
4663
4664         unlock_session(session);
4665
4666         /* session could be broken now, in case of fatal error */
4667
4668         debug_print("get_num_list: got %d msgs\n", nummsgs);
4669
4670         if (nummsgs < 0) {
4671                 statusbar_pop_all();
4672                 return -1;
4673         }
4674
4675         *msgnum_list = uidlist;
4676
4677         dir = folder_item_get_path((FolderItem *)item);
4678         debug_print("removing old messages from %s\n", dir);
4679         remove_numbered_files_not_in_list(dir, *msgnum_list);
4680         g_free(dir);
4681
4682         debug_print("get_num_list - ok - %i\n", nummsgs);
4683         statusbar_pop_all();
4684         item->should_trash_cache = FALSE;
4685         item->should_update = FALSE;
4686         return nummsgs;
4687 }
4688
4689 static MsgInfo *imap_parse_msg(const gchar *file, FolderItem *item)
4690 {
4691         MsgInfo *msginfo;
4692         MsgFlags flags;
4693
4694         flags.perm_flags = MSG_NEW|MSG_UNREAD;
4695         flags.tmp_flags = 0;
4696
4697         g_return_val_if_fail(item != NULL, NULL);
4698         g_return_val_if_fail(file != NULL, NULL);
4699
4700         if (folder_has_parent_of_type(item, F_QUEUE)) {
4701                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
4702         } else if (folder_has_parent_of_type(item, F_DRAFT)) {
4703                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
4704         }
4705
4706         msginfo = procheader_parse_file(file, flags, FALSE, FALSE);
4707         if (!msginfo) return NULL;
4708
4709         msginfo->plaintext_file = g_strdup(file);
4710         msginfo->folder = item;
4711
4712         return msginfo;
4713 }
4714
4715 GSList *imap_get_msginfos(Folder *folder, FolderItem *item,
4716                           GSList *msgnum_list)
4717 {
4718         IMAPSession *session;
4719         MsgInfoList *ret = NULL;
4720         gint ok;
4721
4722         debug_print("get_msginfos\n");
4723
4724         g_return_val_if_fail(folder != NULL, NULL);
4725         g_return_val_if_fail(item != NULL, NULL);
4726         g_return_val_if_fail(msgnum_list != NULL, NULL);
4727
4728         debug_print("getting session...\n");
4729         session = imap_session_get(folder);
4730         g_return_val_if_fail(session != NULL, NULL);
4731
4732         lock_session(session); /* unlocked later in the function */
4733
4734         debug_print("IMAP getting msginfos\n");
4735         ok = imap_select(session, IMAP_FOLDER(folder), item,
4736                          NULL, NULL, NULL, NULL, NULL, FALSE);
4737         if (ok != MAILIMAP_NO_ERROR) {
4738                 return NULL;
4739         }
4740         if (!(folder_has_parent_of_type(item, F_DRAFT) ||
4741               folder_has_parent_of_type(item, F_QUEUE))) {
4742                 ret = g_slist_concat(ret,
4743                         imap_get_uncached_messages(session, item,
4744                                                    msgnum_list, &ok));
4745                 if (ok != MAILIMAP_NO_ERROR)
4746                         return NULL;
4747                 unlock_session(session);
4748         } else {
4749                 MsgNumberList *sorted_list, *elem, *llast = NULL;
4750                 gint startnum, lastnum;
4751
4752                 unlock_session(session);
4753
4754                 sorted_list = g_slist_sort(g_slist_copy(msgnum_list), g_int_compare);
4755
4756                 startnum = lastnum = GPOINTER_TO_INT(sorted_list->data);
4757
4758                 llast = g_slist_last(ret);
4759                 for (elem = sorted_list;; elem = g_slist_next(elem)) {
4760                         guint num = 0;
4761
4762                         if (elem)
4763                                 num = GPOINTER_TO_INT(elem->data);
4764
4765                         if (num > lastnum + 1 || elem == NULL) {
4766                                 int i;
4767                                 for (i = startnum; i <= lastnum; ++i) {
4768                                         gchar *file;
4769                                         file = imap_fetch_msg(folder, item, i);
4770                                         if (file != NULL) {
4771                                                 MsgInfo *msginfo = imap_parse_msg(file, item);
4772                                                 if (msginfo != NULL) {
4773                                                         msginfo->msgnum = i;
4774                                                         if (llast == NULL)
4775                                                                 llast = ret = g_slist_append(ret, msginfo);
4776                                                         else {
4777                                                                 llast = g_slist_append(llast, msginfo);
4778                                                                 llast = llast->next;
4779                                                         }
4780                                                 }
4781                                                 g_free(file);
4782                                         }
4783                                 }
4784
4785                                 if (elem == NULL)
4786                                         break;
4787
4788                                 startnum = num;
4789                         }
4790                         lastnum = num;
4791                 }
4792
4793                 g_slist_free(sorted_list);
4794         }
4795         return ret;
4796 }
4797
4798 MsgInfo *imap_get_msginfo(Folder *folder, FolderItem *item, gint uid)
4799 {
4800         MsgInfo *msginfo = NULL;
4801         MsgInfoList *msginfolist;
4802         MsgNumberList numlist;
4803
4804         numlist.next = NULL;
4805         numlist.data = GINT_TO_POINTER(uid);
4806
4807         msginfolist = imap_get_msginfos(folder, item, &numlist);
4808         if (msginfolist != NULL) {
4809                 msginfo = msginfolist->data;
4810                 g_slist_free(msginfolist);
4811         }
4812
4813         return msginfo;
4814 }
4815
4816 gboolean imap_scan_required(Folder *folder, FolderItem *_item)
4817 {
4818         IMAPSession *session;
4819         IMAPFolderItem *item = (IMAPFolderItem *)_item;
4820         gint ok, exists = 0, unseen = 0;
4821         guint32 uid_next = 0, uid_val = 0;
4822         gboolean selected_folder;
4823
4824         g_return_val_if_fail(folder != NULL, FALSE);
4825         g_return_val_if_fail(item != NULL, FALSE);
4826         g_return_val_if_fail(item->item.folder != NULL, FALSE);
4827         g_return_val_if_fail(FOLDER_CLASS(item->item.folder) == &imap_class, FALSE);
4828
4829         if (item->item.path == NULL)
4830                 return FALSE;
4831
4832         if (item->should_update) {
4833                 debug_print("scan already required\n");
4834                 return TRUE;
4835         }
4836         debug_print("getting session...\n");
4837         session = imap_session_get(folder);
4838
4839         g_return_val_if_fail(session != NULL, FALSE);
4840         lock_session(session); /* unlocked later in the function */
4841
4842         selected_folder = (session->mbox != NULL) &&
4843                           (!strcmp(session->mbox, item->item.path));
4844         if (selected_folder) {
4845                 if (!session->folder_content_changed) {
4846                         ok = imap_cmd_noop(session);
4847                         if (ok != MAILIMAP_NO_ERROR) {
4848                                 debug_print("disconnected!\n");
4849                                 if (!is_fatal(ok))
4850                                         session = imap_reconnect_if_possible(folder, session);
4851                                 else
4852                                         session = imap_session_get(folder);
4853                                 if (session == NULL)
4854                                         return FALSE;
4855                         }
4856
4857                         if (session->folder_content_changed) {
4858                                 debug_print("CHANGED (self-noop)! scan_required\n");
4859                                 item->should_update = TRUE;
4860                                 if (session->uid_validity && session->uid_validity != item->item.mtime) {
4861                                         item->item.mtime = session->uid_validity;
4862                                         item->should_trash_cache = TRUE;
4863                                 }
4864                                 unlock_session(session);
4865                                 return TRUE;
4866                         }
4867                 } else {
4868                         debug_print("CHANGED (previous noop)! scan_required\n");
4869                         item->should_update = TRUE;
4870                         if (session->uid_validity && session->uid_validity != item->item.mtime) {
4871                                 item->item.mtime = session->uid_validity;
4872                                 item->should_trash_cache = TRUE;
4873                         }
4874                         unlock_session(session);
4875                         return TRUE;
4876                 }
4877         } else {
4878                 ok = imap_status(session, IMAP_FOLDER(folder), item->item.path, IMAP_FOLDER_ITEM(item),
4879                                  &exists, &uid_next, &uid_val, &unseen, FALSE);
4880                 if (ok != MAILIMAP_NO_ERROR) {
4881                         return FALSE;
4882                 }
4883
4884                 debug_print("exists %d, item->item.total_msgs %d\n"
4885                             "\tunseen %d, item->item.unread_msgs %d\n"
4886                             "\tuid_next %d, item->uid_next %d\n"
4887                             "\tuid_val %d, item->item.mtime %ld\n",
4888                             exists, item->item.total_msgs, unseen, item->item.unread_msgs,
4889                             uid_next, item->uid_next, uid_val, (long)(item->item.mtime));
4890                 if (exists != item->item.total_msgs
4891                     || unseen != item->item.unread_msgs
4892                     || uid_next != item->uid_next
4893                     || uid_val != item->item.mtime) {
4894                         debug_print("CHANGED (status)! scan_required\n");
4895                         item->last_change = time(NULL);
4896                         item->should_update = TRUE;
4897                         item->uid_next = uid_next;
4898                         if (uid_val != item->item.mtime) {
4899                                 item->item.mtime = uid_val;
4900                                 item->should_trash_cache = TRUE;
4901                         }
4902                         unlock_session(session);
4903                         return TRUE;
4904                 }
4905         }
4906         unlock_session(session);
4907
4908         item->should_update = FALSE;
4909         return FALSE;
4910 }
4911
4912 void imap_change_flags(Folder *folder, FolderItem *item, MsgInfo *msginfo, MsgPermFlags newflags)
4913 {
4914         IMAPSession *session;
4915         IMAPFlags flags_set = 0, flags_unset = 0;
4916         gint ok = MAILIMAP_NO_ERROR;
4917         MsgNumberList numlist;
4918         hashtable_data *ht_data = NULL;
4919
4920         g_return_if_fail(folder != NULL);
4921         g_return_if_fail(folder->klass == &imap_class);
4922         g_return_if_fail(item != NULL);
4923         g_return_if_fail(item->folder == folder);
4924         g_return_if_fail(msginfo != NULL);
4925         g_return_if_fail(msginfo->folder == item);
4926
4927         if (!MSG_IS_MARKED(msginfo->flags) &&  (newflags & MSG_MARKED))
4928                 flags_set |= IMAP_FLAG_FLAGGED;
4929         if ( MSG_IS_MARKED(msginfo->flags) && !(newflags & MSG_MARKED))
4930                 flags_unset |= IMAP_FLAG_FLAGGED;
4931
4932         if (!MSG_IS_UNREAD(msginfo->flags) &&  (newflags & MSG_UNREAD))
4933                 flags_unset |= IMAP_FLAG_SEEN;
4934         if ( MSG_IS_UNREAD(msginfo->flags) && !(newflags & MSG_UNREAD))
4935                 flags_set |= IMAP_FLAG_SEEN;
4936
4937         if (!MSG_IS_REPLIED(msginfo->flags) &&  (newflags & MSG_REPLIED))
4938                 flags_set |= IMAP_FLAG_ANSWERED;
4939         if ( MSG_IS_REPLIED(msginfo->flags) && !(newflags & MSG_REPLIED))
4940                 flags_unset |= IMAP_FLAG_ANSWERED;
4941
4942         if (!MSG_IS_FORWARDED(msginfo->flags) &&  (newflags & MSG_FORWARDED))
4943                 flags_set |= IMAP_FLAG_FORWARDED;
4944         if ( MSG_IS_FORWARDED(msginfo->flags) && !(newflags & MSG_FORWARDED))
4945                 flags_unset |= IMAP_FLAG_FORWARDED;
4946
4947         if (!MSG_IS_SPAM(msginfo->flags) &&  (newflags & MSG_SPAM)) {
4948                 flags_set |= IMAP_FLAG_SPAM;
4949                 flags_unset |= IMAP_FLAG_HAM;
4950         }
4951         if ( MSG_IS_SPAM(msginfo->flags) && !(newflags & MSG_SPAM)) {
4952                 flags_set |= IMAP_FLAG_HAM;
4953                 flags_unset |= IMAP_FLAG_SPAM;
4954         }
4955         if (!MSG_IS_DELETED(msginfo->flags) &&  (newflags & MSG_DELETED))
4956                 flags_set |= IMAP_FLAG_DELETED;
4957         if ( MSG_IS_DELETED(msginfo->flags) && !(newflags & MSG_DELETED))
4958                 flags_unset |= IMAP_FLAG_DELETED;
4959
4960         if (!flags_set && !flags_unset) {
4961                 /* the changed flags were not translatable to IMAP-speak.
4962                  * like MSG_POSTFILTERED, so just apply. */
4963                 msginfo->flags.perm_flags = newflags;
4964                 return;
4965         }
4966
4967         debug_print("getting session...\n");
4968         session = imap_session_get(folder);
4969         if (!session) {
4970                 return;
4971         }
4972
4973         if ((ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
4974             NULL, NULL, NULL, NULL, NULL, FALSE)) != MAILIMAP_NO_ERROR) {
4975                 return;
4976         }
4977         numlist.next = NULL;
4978         numlist.data = GINT_TO_POINTER(msginfo->msgnum);
4979
4980         if (IMAP_FOLDER_ITEM(item)->batching) {
4981                 /* instead of performing an UID STORE command for each message change,
4982                  * as a lot of them can change "together", we just fill in hashtables
4983                  * and defer the treatment so that we're able to send only one
4984                  * command.
4985                  */
4986                 debug_print("IMAP batch mode on, deferring flags change\n");
4987                 if (flags_set) {
4988                         ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->flags_set_table,
4989                                 GINT_TO_POINTER(flags_set));
4990                         if (ht_data == NULL) {
4991                                 ht_data = g_new0(hashtable_data, 1);
4992                                 ht_data->item = IMAP_FOLDER_ITEM(item);
4993                                 g_hash_table_insert(IMAP_FOLDER_ITEM(item)->flags_set_table,
4994                                         GINT_TO_POINTER(flags_set), ht_data);
4995                         }
4996                         ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
4997                 }
4998                 if (flags_unset) {
4999                         ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->flags_unset_table,
5000                                 GINT_TO_POINTER(flags_unset));
5001                         if (ht_data == NULL) {
5002                                 ht_data = g_new0(hashtable_data, 1);
5003                                 ht_data->item = IMAP_FOLDER_ITEM(item);
5004                                 g_hash_table_insert(IMAP_FOLDER_ITEM(item)->flags_unset_table,
5005                                         GINT_TO_POINTER(flags_unset), ht_data);
5006                         }
5007                         ht_data->msglist = g_slist_prepend(ht_data->msglist,
5008                                         GINT_TO_POINTER(msginfo->msgnum));
5009                 }
5010         } else {
5011                 debug_print("IMAP changing flags\n");
5012                 if (flags_set) {
5013                         ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item), &numlist, flags_set, NULL, TRUE);
5014                         if (ok != MAILIMAP_NO_ERROR) {
5015                                 return;
5016                         }
5017                 }
5018
5019                 if (flags_unset) {
5020                         ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item), &numlist, flags_unset, NULL, FALSE);
5021                         if (ok != MAILIMAP_NO_ERROR) {
5022                                 return;
5023                         }
5024                 }
5025         }
5026         msginfo->flags.perm_flags = newflags;
5027         return;
5028 }
5029
5030 static gint imap_remove_msg(Folder *folder, FolderItem *item, gint uid)
5031 {
5032         gint ok;
5033         IMAPSession *session;
5034         gchar *dir;
5035         MsgNumberList numlist;
5036
5037         g_return_val_if_fail(folder != NULL, -1);
5038         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
5039         g_return_val_if_fail(item != NULL, -1);
5040
5041         debug_print("getting session...\n");
5042         session = imap_session_get(folder);
5043         if (!session) return -1;
5044
5045         ok = imap_select(session, IMAP_FOLDER(folder), item,
5046                          NULL, NULL, NULL, NULL, NULL, FALSE);
5047         if (ok != MAILIMAP_NO_ERROR) {
5048                 return ok;
5049         }
5050         numlist.next = NULL;
5051         numlist.data = GINT_TO_POINTER(uid);
5052
5053         ok = imap_set_message_flags
5054                 (session, IMAP_FOLDER_ITEM(item), &numlist, IMAP_FLAG_DELETED, NULL, TRUE);
5055         if (ok != MAILIMAP_NO_ERROR) {
5056                 log_warning(LOG_PROTOCOL, _("can't set deleted flags: %d\n"), uid);
5057                 return ok;
5058         }
5059
5060         ok = imap_cmd_expunge(session);
5061
5062         if (ok != MAILIMAP_NO_ERROR) {
5063                 log_warning(LOG_PROTOCOL, _("can't expunge\n"));
5064                 return ok;
5065         }
5066
5067         IMAP_FOLDER_ITEM(item)->uid_list = g_slist_remove(
5068             IMAP_FOLDER_ITEM(item)->uid_list, numlist.data);
5069         dir = folder_item_get_path(item);
5070         if (is_dir_exist(dir))
5071                 remove_numbered_files(dir, uid, uid);
5072         g_free(dir);
5073         return MAILIMAP_NO_ERROR;
5074 }
5075
5076 static gint compare_msginfo(gconstpointer a, gconstpointer b)
5077 {
5078         return ((MsgInfo *)a)->msgnum - ((MsgInfo *)b)->msgnum;
5079 }
5080
5081 static guint gslist_find_next_num(MsgNumberList **list, guint num)
5082 {
5083         GSList *elem;
5084
5085         g_return_val_if_fail(list != NULL, -1);
5086
5087         for (elem = *list; elem != NULL; elem = g_slist_next(elem))
5088                 if (GPOINTER_TO_INT(elem->data) >= num)
5089                         break;
5090         *list = elem;
5091         return elem != NULL ? GPOINTER_TO_INT(elem->data) : (gint)-1;
5092 }
5093
5094 static gboolean flag_ok(IMAPFolderItem *item, guint flag)
5095 {
5096         if (item->ok_flags && g_slist_find(item->ok_flags, GUINT_TO_POINTER(flag))) {
5097                 debug_print("flag %d is OK\n", flag);
5098                 return TRUE;
5099         }
5100         if (item->can_create_flags == ITEM_CAN_CREATE_FLAGS) {
5101                 debug_print("creating flags is OK\n");
5102                 return TRUE;
5103         }
5104         return FALSE;
5105 }
5106
5107 /*
5108  * NEW and DELETED flags are not syncronized
5109  * - The NEW/RECENT flags in IMAP folders can not really be directly
5110  *   modified by Sylpheed
5111  * - The DELETE/DELETED flag in IMAP and Sylpheed don't have the same
5112  *   meaning, in IMAP it always removes the messages from the FolderItem
5113  *   in Sylpheed it can mean to move the message to trash
5114  */
5115
5116 typedef struct _get_flags_data {
5117         Folder *folder;
5118         FolderItem *item;
5119         MsgInfoList *msginfo_list;
5120         GHashTable *msgflags;
5121         gboolean full_search;
5122         gboolean done;
5123 } get_flags_data;
5124
5125 static /*gint*/ void *imap_get_flags_thread(void *data)
5126 {
5127         get_flags_data *stuff = (get_flags_data *)data;
5128         Folder *folder = stuff->folder;
5129         FolderItem *fitem = (FolderItem *) stuff->item;
5130         MsgInfoList *msginfo_list = stuff->msginfo_list;
5131         GHashTable *msgflags = stuff->msgflags;
5132         GSList *elem;
5133         carray * lep_uidtab;
5134         IMAPSession *session;
5135         gint ok;
5136         int r = MAILIMAP_NO_ERROR;
5137         GHashTable *flags_hash = NULL;
5138         GHashTable *tags_hash = NULL;
5139         gboolean full_search = stuff->full_search;
5140         GSList *sorted_list = NULL;
5141         GSList *unseen = NULL, *answered = NULL, *flagged = NULL, *deleted = NULL, *forwarded = NULL, *spam = NULL;
5142         GSList *seq_list, *cur;
5143         gboolean reverse_seen = FALSE;
5144         gboolean selected_folder;
5145         gint exists_cnt, unseen_cnt;
5146         gboolean got_alien_tags = FALSE;
5147
5148         session = imap_session_get(folder);
5149
5150         if (session == NULL) {
5151                 stuff->done = TRUE;
5152                 return GINT_TO_POINTER(-1);
5153         }
5154         selected_folder = (session->mbox != NULL) &&
5155                           (!strcmp(session->mbox, fitem->path));
5156
5157         lock_session(session);
5158         if (!selected_folder) {
5159                 ok = imap_select(session, IMAP_FOLDER(folder), fitem,
5160                         &exists_cnt, NULL, &unseen_cnt, NULL, NULL, TRUE);
5161                 if (ok != MAILIMAP_NO_ERROR) {
5162                         stuff->done = TRUE;
5163                         return GINT_TO_POINTER(-1);
5164                 }
5165
5166                 if (unseen_cnt > exists_cnt / 2)
5167                         reverse_seen = TRUE;
5168         }
5169         else {
5170                 if (fitem->unread_msgs > fitem->total_msgs / 2)
5171                         reverse_seen = TRUE;
5172         }
5173
5174         sorted_list = g_slist_sort(g_slist_copy(msginfo_list), compare_msginfo);
5175         if (!full_search) {
5176                 seq_list = imap_get_lep_set_from_msglist(IMAP_FOLDER(folder), msginfo_list);
5177         } else {
5178                 struct mailimap_set * set;
5179                 set = mailimap_set_new_interval(1, 0);
5180                 seq_list = g_slist_append(NULL, set);
5181         }
5182
5183         if (folder->account && folder->account->low_bandwidth) {
5184                 for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
5185                         struct mailimap_set * imapset;
5186                         clist * lep_uidlist;
5187                         int r;
5188
5189                         imapset = cur->data;
5190                         if (reverse_seen) {
5191                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SEEN, NULL,
5192                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5193                         }
5194                         else {
5195                                 r = imap_threaded_search(folder,
5196                                                          IMAP_SEARCH_TYPE_UNSEEN, NULL,
5197                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5198                         }
5199                         if (r == MAILIMAP_NO_ERROR) {
5200                                 GSList * uidlist;
5201
5202                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5203                                 mailimap_search_result_free(lep_uidlist);
5204
5205                                 unseen = g_slist_concat(unseen, uidlist);
5206                         } else {
5207                                 imap_handle_error(SESSION(session), NULL, r);
5208                                 goto bail;
5209                         }
5210
5211                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_FLAGGED, NULL,
5212                                                  NULL, full_search ? NULL:imapset, &lep_uidlist);
5213                         if (r == MAILIMAP_NO_ERROR) {
5214                                 GSList * uidlist;
5215
5216                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5217                                 mailimap_search_result_free(lep_uidlist);
5218
5219                                 flagged = g_slist_concat(flagged, uidlist);
5220                         } else {
5221                                 imap_handle_error(SESSION(session), NULL, r);
5222                                 goto bail;
5223                         }
5224
5225                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
5226                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_ANSWERED, NULL,
5227                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5228                                 if (r == MAILIMAP_NO_ERROR) {
5229                                         GSList * uidlist;
5230
5231                                         uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5232                                         mailimap_search_result_free(lep_uidlist);
5233
5234                                         answered = g_slist_concat(answered, uidlist);
5235                                 } else {
5236                                         imap_handle_error(SESSION(session), NULL, r);
5237                                         goto bail;
5238                                 }
5239
5240                                 if (flag_ok(IMAP_FOLDER_ITEM(fitem), IMAP_FLAG_FORWARDED)) {
5241                                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_FORWARDED, NULL,
5242                                                                  NULL, full_search ? NULL:imapset, &lep_uidlist);
5243                                         if (r == MAILIMAP_NO_ERROR) {
5244                                                 GSList * uidlist;
5245
5246                                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5247                                                 mailimap_search_result_free(lep_uidlist);
5248
5249                                                 forwarded = g_slist_concat(forwarded, uidlist);
5250                                         } else {
5251                                                 imap_handle_error(SESSION(session), NULL, r);
5252                                                 goto bail;
5253                                         }
5254                                 }
5255
5256                                 if (flag_ok(IMAP_FOLDER_ITEM(fitem), IMAP_FLAG_SPAM)) {
5257                                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SPAM, NULL,
5258                                                                  NULL, full_search ? NULL:imapset, &lep_uidlist);
5259                                         if (r == MAILIMAP_NO_ERROR) {
5260                                                 GSList * uidlist;
5261
5262                                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5263                                                 mailimap_search_result_free(lep_uidlist);
5264
5265                                                 spam = g_slist_concat(spam, uidlist);
5266                                         } else {
5267                                                 imap_handle_error(SESSION(session), NULL, r);
5268                                                 goto bail;
5269                                         }
5270                                 }
5271
5272                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_DELETED, NULL,
5273                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5274                                 if (r == MAILIMAP_NO_ERROR) {
5275                                         GSList * uidlist;
5276
5277                                         uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5278                                         mailimap_search_result_free(lep_uidlist);
5279
5280                                         deleted = g_slist_concat(deleted, uidlist);
5281                                 } else {
5282                                         imap_handle_error(SESSION(session), NULL, r);
5283                                         goto bail;
5284                                 }
5285                         }
5286                 }
5287
5288         } else {
5289                 r = imap_threaded_fetch_uid_flags(folder, 1, &lep_uidtab);
5290                 if (r == MAILIMAP_NO_ERROR) {
5291                         flags_hash = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, NULL);
5292                         tags_hash = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, NULL);
5293                         imap_flags_hash_from_lep_uid_flags_tab(lep_uidtab, flags_hash, tags_hash);
5294                         imap_fetch_uid_flags_list_free(lep_uidtab);
5295                 } else {
5296                         imap_handle_error(SESSION(session), NULL, r);
5297                         goto bail;
5298                 }
5299         }
5300
5301 bail:
5302         if (r == MAILIMAP_NO_ERROR)
5303                 unlock_session(session);
5304
5305         for (elem = sorted_list; elem != NULL; elem = g_slist_next(elem)) {
5306                 MsgInfo *msginfo;
5307                 MsgPermFlags flags, oldflags;
5308                 gboolean wasnew;
5309
5310                 msginfo = (MsgInfo *) elem->data;
5311                 flags = msginfo->flags.perm_flags;
5312                 wasnew = (flags & MSG_NEW);
5313                 oldflags = flags & ~(MSG_NEW|MSG_UNREAD|MSG_REPLIED|MSG_FORWARDED|MSG_MARKED|MSG_DELETED|MSG_SPAM);
5314
5315                 if (folder->account && folder->account->low_bandwidth) {
5316                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
5317                                 flags &= ~((reverse_seen ? 0 : MSG_UNREAD | MSG_NEW) | MSG_REPLIED | MSG_FORWARDED | MSG_MARKED | MSG_SPAM);
5318                         } else {
5319                                 flags &= ~((reverse_seen ? 0 : MSG_UNREAD | MSG_NEW | MSG_MARKED));
5320                         }
5321                         if (reverse_seen)
5322                                 flags |= MSG_UNREAD | (wasnew ? MSG_NEW : 0);
5323                         if (gslist_find_next_num(&unseen, msginfo->msgnum) == msginfo->msgnum) {
5324                                 if (!reverse_seen) {
5325                                         flags |= MSG_UNREAD | (wasnew ? MSG_NEW : 0);
5326                                 } else {
5327                                         flags &= ~(MSG_UNREAD | MSG_NEW);
5328                                 }
5329                         }
5330
5331                         if (gslist_find_next_num(&flagged, msginfo->msgnum) == msginfo->msgnum)
5332                                 flags |= MSG_MARKED;
5333                         else
5334                                 flags &= ~MSG_MARKED;
5335
5336                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
5337                                 if (gslist_find_next_num(&answered, msginfo->msgnum) == msginfo->msgnum)
5338                                         flags |= MSG_REPLIED;
5339                                 else
5340                                         flags &= ~MSG_REPLIED;
5341                                 if (gslist_find_next_num(&forwarded, msginfo->msgnum) == msginfo->msgnum)
5342                                         flags |= MSG_FORWARDED;
5343                                 else
5344                                         flags &= ~MSG_FORWARDED;
5345                                 if (gslist_find_next_num(&spam, msginfo->msgnum) == msginfo->msgnum)
5346                                         flags |= MSG_SPAM;
5347                                 else
5348                                         flags &= ~MSG_SPAM;
5349                                 if (gslist_find_next_num(&deleted, msginfo->msgnum) == msginfo->msgnum)
5350                                         flags |= MSG_DELETED;
5351                                 else
5352                                         flags &= ~MSG_DELETED;
5353                         }
5354                 } else {
5355                         if (flags_hash != NULL) {
5356
5357                                 flags = GPOINTER_TO_INT(g_hash_table_lookup(flags_hash,
5358                                                 GINT_TO_POINTER(msginfo->msgnum)));
5359                         }
5360
5361                         if ((flags & MSG_UNREAD) == 0)
5362                                 flags &= ~MSG_NEW;
5363                         else if (wasnew)
5364                                 flags |= MSG_NEW;
5365                         flags |= oldflags;
5366
5367                         if (tags_hash != NULL) {
5368                                 GSList *tags = g_hash_table_lookup(tags_hash, GINT_TO_POINTER(msginfo->msgnum));
5369                                 GSList *cur;
5370
5371                                 g_slist_free(msginfo->tags);
5372                                 msginfo->tags = NULL;
5373
5374                                 for (cur = tags; cur; cur = cur->next) {
5375                                         gchar *real_tag = imap_modified_utf7_to_utf8(cur->data, TRUE);
5376                                         gint id = 0;
5377                                         id = tags_get_id_for_str(real_tag);
5378                                         if (id == -1) {
5379                                                 id = tags_add_tag(real_tag);
5380                                                 got_alien_tags = TRUE;
5381                                         }
5382                                         msginfo->tags = g_slist_append(
5383                                                                 msginfo->tags,
5384                                                                 GINT_TO_POINTER(id));
5385                                         g_free(real_tag);
5386                                 }
5387                                 slist_free_strings_full(tags);
5388                         }
5389                 }
5390
5391                 g_hash_table_insert(msgflags, msginfo, GINT_TO_POINTER(flags));
5392         }
5393
5394         if (got_alien_tags) {
5395                 tags_write_tags();
5396                 main_window_reflect_tags_changes(mainwindow_get_mainwindow());
5397         }
5398
5399         if (flags_hash)
5400                 g_hash_table_destroy(flags_hash);
5401         if (tags_hash)
5402                 g_hash_table_destroy(tags_hash);
5403
5404         imap_lep_set_free(seq_list);
5405         g_slist_free(flagged);
5406         g_slist_free(deleted);
5407         g_slist_free(answered);
5408         g_slist_free(forwarded);
5409         g_slist_free(spam);
5410         g_slist_free(unseen);
5411         g_slist_free(sorted_list);
5412
5413         stuff->done = TRUE;
5414         return GINT_TO_POINTER(0);
5415 }
5416
5417 static gint imap_get_flags(Folder *folder, FolderItem *item,
5418                            MsgInfoList *msginfo_list, GHashTable *msgflags)
5419 {
5420         gint result;
5421         get_flags_data *data = g_new0(get_flags_data, 1);
5422         data->done = FALSE;
5423         data->folder = folder;
5424         data->item = item;
5425         data->msginfo_list = msginfo_list;
5426         data->msgflags = msgflags;
5427         data->full_search = FALSE;
5428
5429         GSList *tmp = NULL, *cur;
5430
5431         if (prefs_common.work_offline &&
5432             !inc_offline_should_override(FALSE,
5433                 _("Claws Mail needs network access in order "
5434                   "to access the IMAP server."))) {
5435                 g_free(data);
5436                 return -1;
5437         }
5438
5439         tmp = folder_item_get_msg_list(item);
5440
5441         if (g_slist_length(tmp) <= g_slist_length(msginfo_list))
5442                 data->full_search = TRUE;
5443
5444         for (cur = tmp; cur; cur = cur->next)
5445                 procmsg_msginfo_free((MsgInfo **)&(cur->data));
5446
5447         g_slist_free(tmp);
5448
5449         result = GPOINTER_TO_INT(imap_get_flags_thread(data));
5450
5451         g_free(data);
5452         return result;
5453
5454 }
5455
5456 static gboolean process_flags(gpointer key, gpointer value, gpointer user_data)
5457 {
5458         gboolean flags_set = GPOINTER_TO_INT(user_data);
5459         gint flags_value = GPOINTER_TO_INT(key);
5460         hashtable_data *data = (hashtable_data *)value;
5461         IMAPFolderItem *_item = data->item;
5462         FolderItem *item = (FolderItem *)_item;
5463         gint ok = MAILIMAP_ERROR_BAD_STATE;
5464         IMAPSession *session = NULL;
5465
5466         debug_print("getting session...\n");
5467         session = imap_session_get(item->folder);
5468
5469         data->msglist = g_slist_reverse(data->msglist);
5470
5471         debug_print("IMAP %ssetting flags to %d for %d messages\n",
5472                 flags_set?"":"un",
5473                 flags_value,
5474                 g_slist_length(data->msglist));
5475
5476         lock_session(session);
5477         if (session) {
5478                 ok = imap_select(session, IMAP_FOLDER(item->folder), item,
5479                          NULL, NULL, NULL, NULL, NULL, FALSE);
5480         }
5481         if (ok == MAILIMAP_NO_ERROR) {
5482                 ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item),
5483                         data->msglist, flags_value, NULL, flags_set);
5484         } else {
5485                 g_warning("can't select mailbox %s", item->path);
5486         }
5487
5488         if (!is_fatal(ok))
5489                 unlock_session(session);
5490
5491         g_slist_free(data->msglist);
5492         g_free(data);
5493         return TRUE;
5494 }
5495
5496 static gboolean process_tags(gpointer key, gpointer value, gpointer user_data)
5497 {
5498         gboolean tags_set = GPOINTER_TO_INT(user_data);
5499         TagsData *data = (TagsData *)value;
5500         IMAPFolderItem *_item = data->item;
5501         FolderItem *item = (FolderItem *)_item;
5502         gchar *str = data->str;
5503         gint ok = MAILIMAP_ERROR_BAD_STATE;
5504         IMAPSession *session = NULL;
5505
5506         debug_print("getting session...\n");
5507         session = imap_session_get(item->folder);
5508
5509         data->msglist = g_slist_reverse(data->msglist);
5510
5511         debug_print("IMAP %ssetting tags %s for %d messages\n",
5512                 tags_set?"":"un",
5513                 str,
5514                 g_slist_length(data->msglist));
5515
5516         lock_session(session);
5517         if (session) {
5518                 ok = imap_select(session, IMAP_FOLDER(item->folder), item,
5519                          NULL, NULL, NULL, NULL, NULL, FALSE);
5520         }
5521         if (ok == MAILIMAP_NO_ERROR) {
5522                 GSList list;
5523                 list.data = str;
5524                 list.next = NULL;
5525                 ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item),
5526                         data->msglist, 0, &list, tags_set);
5527         } else {
5528                 g_warning("can't select mailbox %s", item->path);
5529         }
5530
5531         if (!is_fatal(ok))
5532                 unlock_session(session);
5533
5534         g_slist_free(data->msglist);
5535         g_free(data->str);
5536         g_free(data);
5537         return TRUE;
5538 }
5539
5540 static void process_hashtable(IMAPFolderItem *item)
5541 {
5542         if (item->flags_set_table) {
5543                 g_hash_table_foreach_remove(item->flags_set_table, process_flags, GINT_TO_POINTER(TRUE));
5544                 g_hash_table_destroy(item->flags_set_table);
5545                 item->flags_set_table = NULL;
5546         }
5547         if (item->flags_unset_table) {
5548                 g_hash_table_foreach_remove(item->flags_unset_table, process_flags, GINT_TO_POINTER(FALSE));
5549                 g_hash_table_destroy(item->flags_unset_table);
5550                 item->flags_unset_table = NULL;
5551         }
5552         if (item->tags_set_table) {
5553                 g_hash_table_foreach_remove(item->tags_set_table, process_tags, GINT_TO_POINTER(TRUE));
5554                 g_hash_table_destroy(item->tags_set_table);
5555                 item->tags_set_table = NULL;
5556         }
5557         if (item->tags_unset_table) {
5558                 g_hash_table_foreach_remove(item->tags_unset_table, process_tags, GINT_TO_POINTER(FALSE));
5559                 g_hash_table_destroy(item->tags_unset_table);
5560                 item->tags_unset_table = NULL;
5561         }
5562
5563 }
5564
5565 static void imap_set_batch (Folder *folder, FolderItem *_item, gboolean batch)
5566 {
5567         IMAPFolderItem *item = (IMAPFolderItem *)_item;
5568         IMAPSession *session;
5569
5570         g_return_if_fail(item != NULL);
5571
5572         if (item->batching == batch)
5573                 return;
5574
5575         if (batch) {
5576                 item->batching = TRUE;
5577                 debug_print("IMAP switching to batch mode\n");
5578                 if (!item->flags_set_table) {
5579                         item->flags_set_table = g_hash_table_new(NULL, g_direct_equal);
5580                 }
5581                 if (!item->flags_unset_table) {
5582                         item->flags_unset_table = g_hash_table_new(NULL, g_direct_equal);
5583                 }
5584                 if (!item->tags_set_table) {
5585                         item->tags_set_table = g_hash_table_new(NULL, g_direct_equal);
5586                 }
5587                 if (!item->tags_unset_table) {
5588                         item->tags_unset_table = g_hash_table_new(NULL, g_direct_equal);
5589                 }
5590                 session = imap_session_get(folder);
5591                 if (session) {
5592                         imap_refresh_sensitivity(session);
5593                         session->sens_update_block = TRUE;
5594                 }
5595         } else {
5596                 debug_print("IMAP switching away from batch mode\n");
5597                 /* process stuff */
5598                 process_hashtable(item);
5599                 item->batching = FALSE;
5600                 session = imap_session_get(folder);
5601                 if (session) {
5602                         session->sens_update_block = FALSE;
5603                         imap_refresh_sensitivity(session);
5604                 }
5605         }
5606 }
5607
5608
5609
5610 /* data types conversion libetpan <-> claws */
5611
5612
5613
5614 #define ETPAN_IMAP_MB_MARKED      1
5615 #define ETPAN_IMAP_MB_UNMARKED    2
5616 #define ETPAN_IMAP_MB_NOSELECT    4
5617 #define ETPAN_IMAP_MB_NOINFERIORS 8
5618
5619 static int imap_flags_to_flags(struct mailimap_mbx_list_flags * imap_flags)
5620 {
5621   int flags;
5622   clistiter * cur;
5623
5624   flags = 0;
5625   if (imap_flags->mbf_type == MAILIMAP_MBX_LIST_FLAGS_SFLAG) {
5626     switch (imap_flags->mbf_sflag) {
5627     case MAILIMAP_MBX_LIST_SFLAG_MARKED:
5628       flags |= ETPAN_IMAP_MB_MARKED;
5629       break;
5630     case MAILIMAP_MBX_LIST_SFLAG_NOSELECT:
5631       flags |= ETPAN_IMAP_MB_NOSELECT;
5632       break;
5633     case MAILIMAP_MBX_LIST_SFLAG_UNMARKED:
5634       flags |= ETPAN_IMAP_MB_UNMARKED;
5635       break;
5636     }
5637   }
5638
5639   if (imap_flags->mbf_oflags) {
5640     for(cur = clist_begin(imap_flags->mbf_oflags) ; cur != NULL ;
5641         cur = clist_next(cur)) {
5642       struct mailimap_mbx_list_oflag * oflag;
5643
5644       oflag = clist_content(cur);
5645
5646       switch (oflag->of_type) {
5647       case MAILIMAP_MBX_LIST_OFLAG_NOINFERIORS:
5648         flags |= ETPAN_IMAP_MB_NOINFERIORS;
5649         break;
5650       }
5651     }
5652   }
5653   return flags;
5654 }
5655
5656 static GSList * imap_list_from_lep(IMAPFolder * folder,
5657                                    clist * list, const gchar * real_path, gboolean all)
5658 {
5659         clistiter * iter;
5660         GSList * item_list = NULL, *llast = NULL;
5661
5662         if (list) {
5663                 for(iter = clist_begin(list) ; iter != NULL ;
5664                     iter = clist_next(iter)) {
5665                         struct mailimap_mailbox_list * mb;
5666                         int flags;
5667                         char delimiter;
5668                         char * name;
5669                         char * dup_name;
5670                         gchar * base;
5671                         gchar * loc_name;
5672                         gchar * loc_path;
5673                         FolderItem *new_item;
5674
5675                         mb = clist_content(iter);
5676
5677                         if (mb == NULL)
5678                                 continue;
5679
5680                         flags = 0;
5681                         if (mb->mb_flag != NULL)
5682                                 flags = imap_flags_to_flags(mb->mb_flag);
5683
5684                         delimiter = mb->mb_delimiter;
5685                         name = mb->mb_name;
5686
5687                         dup_name = strdup(name);
5688                         if (delimiter != '\0')
5689                                 subst_char(dup_name, delimiter, '/');
5690
5691                         base = g_path_get_basename(dup_name);
5692                         if (base[0] == '.') {
5693                                 g_free(base);
5694                                 free(dup_name);
5695                                 continue;
5696                         }
5697                         if (!all && path_cmp(name, real_path) == 0) {
5698                                 g_free(base);
5699                                 free(dup_name);
5700                                 continue;
5701                         }
5702
5703                         if (!all && dup_name[strlen(dup_name)-1] == '/') {
5704                                 g_free(base);
5705                                 free(dup_name);
5706                                 continue;
5707                         }
5708
5709                         loc_name = imap_modified_utf7_to_utf8(base, FALSE);
5710                         loc_path = imap_modified_utf7_to_utf8(dup_name, FALSE);
5711
5712                         new_item = folder_item_new(FOLDER(folder), loc_name, loc_path);
5713                         if ((flags & ETPAN_IMAP_MB_NOINFERIORS) != 0)
5714                                 new_item->no_sub = TRUE;
5715                         if (strcasecmp(dup_name, "INBOX") != 0 &&
5716                             ((flags & ETPAN_IMAP_MB_NOSELECT) != 0))
5717                                 new_item->no_select = TRUE;
5718
5719                         if (item_list == NULL)
5720                                 llast = item_list = g_slist_append(item_list, new_item);
5721                         else {
5722                                 llast = g_slist_append(llast, new_item);
5723                                 llast = llast->next;
5724                         }
5725                         debug_print("folder '%s' found.\n", loc_path);
5726                         g_free(base);
5727                         g_free(loc_path);
5728                         g_free(loc_name);
5729
5730                         free(dup_name);
5731                 }
5732         }
5733         return item_list;
5734 }
5735
5736 static GSList * imap_get_lep_set_from_numlist(IMAPFolder *folder, MsgNumberList *numlist)
5737 {
5738         GSList *sorted_list, *cur;
5739         guint first, last, next;
5740         GSList *ret_list = NULL, *llast = NULL;
5741         struct mailimap_set * current_set;
5742         unsigned int item_count;
5743
5744         if (numlist == NULL)
5745                 return NULL;
5746
5747         current_set = mailimap_set_new_empty();
5748
5749         sorted_list = g_slist_copy(numlist);
5750         sorted_list = g_slist_sort(sorted_list, g_int_compare);
5751
5752         first = GPOINTER_TO_INT(sorted_list->data);
5753
5754         item_count = 0;
5755         for (cur = sorted_list; cur != NULL; cur = g_slist_next(cur)) {
5756                 if (GPOINTER_TO_INT(cur->data) == 0)
5757                         continue;
5758
5759                 item_count ++;
5760
5761                 last = GPOINTER_TO_INT(cur->data);
5762                 if (cur->next)
5763                         next = GPOINTER_TO_INT(cur->next->data);
5764                 else
5765                         next = 0;
5766
5767                 if (last + 1 != next || next == 0 || item_count >= folder->max_set_size) {
5768
5769                         struct mailimap_set_item * item;
5770                         item = mailimap_set_item_new(first, last);
5771                         mailimap_set_add(current_set, item);
5772
5773                         first = next;
5774
5775                         if (item_count >= folder->max_set_size) {
5776                                 if (ret_list == NULL)
5777                                         llast = ret_list = g_slist_append(ret_list,
5778                                                           current_set);
5779                                 else {
5780                                         llast = g_slist_append(llast, current_set);
5781                                         llast = llast->next;
5782                                 }
5783
5784                                 current_set = mailimap_set_new_empty();
5785                                 item_count = 0;
5786                         }
5787                 }
5788         }
5789
5790         if (clist_count(current_set->set_list) > 0) {
5791                 ret_list = g_slist_append(ret_list,
5792                                           current_set);
5793         }
5794
5795         g_slist_free(sorted_list);
5796
5797         return ret_list;
5798 }
5799
5800 static GSList * imap_get_lep_set_from_msglist(IMAPFolder *folder, MsgInfoList *msglist)
5801 {
5802         MsgNumberList *numlist = NULL;
5803         GSList *seq_list;
5804
5805         numlist = procmsg_get_number_list_for_msgs(msglist);
5806
5807         seq_list = imap_get_lep_set_from_numlist(folder, numlist);
5808         g_slist_free(numlist);
5809
5810         return seq_list;
5811 }
5812
5813 static GSList * imap_uid_list_from_lep(clist * list, gint* length)
5814 {
5815         clistiter * iter;
5816         GSList * result;
5817         gint len = 0;
5818
5819         result = NULL;
5820
5821         if (list) {
5822                 for(iter = clist_begin(list) ; iter != NULL ;
5823                     iter = clist_next(iter)) {
5824                         uint32_t * puid;
5825
5826                         puid = clist_content(iter);
5827                         result = g_slist_prepend(result, GINT_TO_POINTER(* puid));
5828                         len++;
5829                 }
5830                 result = g_slist_reverse(result);
5831         }
5832         if (length)
5833                 *length = len;
5834         return result;
5835 }
5836
5837 static GSList * imap_uid_list_from_lep_tab(carray * list)
5838 {
5839         unsigned int i;
5840         GSList * result;
5841
5842         result = NULL;
5843
5844         for(i = 0 ; i < carray_count(list) ; i ++) {
5845                 uint32_t * puid;
5846
5847                 puid = carray_get(list, i);
5848                 result = g_slist_prepend(result, GINT_TO_POINTER(* puid));
5849         }
5850         result = g_slist_reverse(result);
5851         return result;
5852 }
5853
5854 static void imap_flags_hash_from_lep_uid_flags_tab(carray * list,
5855                                                    GHashTable * hash,
5856                                                    GHashTable * tags_hash)
5857 {
5858         unsigned int i;
5859
5860         for(i = 0 ; i < carray_count(list) ; i += 3) {
5861                 uint32_t * puid;
5862                 int * pflags;
5863                 GSList *tags;
5864
5865                 puid = carray_get(list, i);
5866                 pflags = carray_get(list, i + 1);
5867                 tags = carray_get(list, i + 2);
5868
5869                 g_hash_table_insert(hash, GINT_TO_POINTER(*puid), GINT_TO_POINTER(* pflags));
5870                 g_hash_table_insert(tags_hash, GINT_TO_POINTER(*puid), tags);
5871         }
5872 }
5873
5874 static MsgInfo *imap_envelope_from_lep(struct imap_fetch_env_info * info,
5875                                        FolderItem *item)
5876 {
5877         MsgInfo *msginfo = NULL;
5878         guint32 uid = 0;
5879         goffset size = 0;
5880         MsgFlags flags = {0, 0};
5881
5882         if (info->headers == NULL)
5883                 return NULL;
5884
5885         MSG_SET_TMP_FLAGS(flags, MSG_IMAP);
5886         if (folder_has_parent_of_type(item, F_QUEUE)) {
5887                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
5888         } else if (folder_has_parent_of_type(item, F_DRAFT)) {
5889                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
5890         }
5891         flags.perm_flags = info->flags;
5892
5893         uid = info->uid;
5894         size = (goffset) info->size;
5895         msginfo = procheader_parse_str(info->headers, flags, FALSE, FALSE);
5896
5897         if (msginfo) {
5898                 msginfo->msgnum = uid;
5899                 msginfo->size = size;
5900         }
5901
5902         return msginfo;
5903 }
5904
5905 static void imap_lep_set_free(GSList *seq_list)
5906 {
5907         GSList * cur;
5908
5909         for(cur = seq_list ; cur != NULL ; cur = g_slist_next(cur)) {
5910                 struct mailimap_set * imapset;
5911
5912                 imapset = cur->data;
5913                 mailimap_set_free(imapset);
5914         }
5915         g_slist_free(seq_list);
5916 }
5917
5918 static struct mailimap_flag_list * imap_flag_to_lep(IMAPFolderItem *item, IMAPFlags flags, GSList *tags)
5919 {
5920         struct mailimap_flag_list * flag_list;
5921         GSList *cur = tags;
5922
5923         flag_list = mailimap_flag_list_new_empty();
5924
5925         if (IMAP_IS_SEEN(flags))
5926                 mailimap_flag_list_add(flag_list,
5927                                        mailimap_flag_new_seen());
5928         if (IMAP_IS_ANSWERED(flags))
5929                 mailimap_flag_list_add(flag_list,
5930                                        mailimap_flag_new_answered());
5931         if (IMAP_IS_FLAGGED(flags))
5932                 mailimap_flag_list_add(flag_list,
5933                                        mailimap_flag_new_flagged());
5934         if (IMAP_IS_DELETED(flags))
5935                 mailimap_flag_list_add(flag_list,
5936                                        mailimap_flag_new_deleted());
5937         if (IMAP_IS_DRAFT(flags))
5938                 mailimap_flag_list_add(flag_list,
5939                                        mailimap_flag_new_draft());
5940         if (IMAP_IS_FORWARDED(flags) && flag_ok(item, IMAP_FLAG_FORWARDED))
5941                 mailimap_flag_list_add(flag_list,
5942                                        mailimap_flag_new_flag_keyword(strdup(RTAG_FORWARDED)));
5943         if (IMAP_IS_SPAM(flags) && flag_ok(item, IMAP_FLAG_SPAM))
5944                 mailimap_flag_list_add(flag_list,
5945                                        mailimap_flag_new_flag_keyword(strdup(RTAG_JUNK)));
5946         else if (IMAP_IS_HAM(flags) && flag_ok(item, IMAP_FLAG_HAM))
5947                 mailimap_flag_list_add(flag_list,
5948                                        mailimap_flag_new_flag_keyword(strdup(RTAG_NON_JUNK)));
5949
5950         for (; cur; cur = cur->next) {
5951                 gchar *enc_str =
5952                         imap_utf8_to_modified_utf7(cur->data, TRUE);
5953                 g_strstrip(enc_str);
5954
5955                 mailimap_flag_list_add(flag_list,
5956                         mailimap_flag_new_flag_keyword(enc_str));
5957         }
5958
5959         return flag_list;
5960 }
5961
5962 guint imap_folder_get_refcnt(Folder *folder)
5963 {
5964         return ((IMAPFolder *)folder)->refcnt;
5965 }
5966
5967 void imap_folder_ref(Folder *folder)
5968 {
5969         ((IMAPFolder *)folder)->refcnt++;
5970 }
5971
5972 void imap_disconnect_all(gboolean have_connectivity)
5973 {
5974         GList *list;
5975         gboolean short_timeout;
5976 #ifdef HAVE_NETWORKMANAGER_SUPPORT
5977         GError *error = NULL;
5978
5979         short_timeout = !networkmanager_is_online(&error);
5980         if(error) {
5981                 short_timeout = TRUE;
5982                 g_error_free(error);
5983         }
5984 #else
5985         short_timeout = TRUE;
5986 #endif
5987
5988         if(short_timeout)
5989                 imap_main_set_timeout(1);
5990
5991         for (list = account_get_list(); list != NULL; list = list->next) {
5992                 PrefsAccount *account = list->data;
5993                 if (account->protocol == A_IMAP4) {
5994                         RemoteFolder *folder = (RemoteFolder *)account->folder;
5995                         if (folder && folder->session) {
5996                                 if (imap_is_busy(FOLDER(folder)))
5997                                         imap_threaded_cancel(FOLDER(folder));
5998
5999                                 IMAPSession *session = (IMAPSession *)folder->session;
6000                                 if (have_connectivity)
6001                                         imap_threaded_disconnect(FOLDER(folder));
6002                                 SESSION(session)->state = SESSION_DISCONNECTED;
6003                                 SESSION(session)->sock = NULL;
6004                                 imap_safe_destroy(session);
6005                                 folder->session = NULL;
6006                         }
6007                 }
6008         }
6009
6010         if(short_timeout)
6011                 imap_main_set_timeout(prefs_common.io_timeout_secs);
6012 }
6013
6014 void imap_folder_unref(Folder *folder)
6015 {
6016         if (((IMAPFolder *)folder)->refcnt > 0)
6017                 ((IMAPFolder *)folder)->refcnt--;
6018 }
6019
6020 void imap_cancel_all(void)
6021 {
6022         GList *folderlist;
6023         GList *cur;
6024
6025         folderlist = folder_get_list();
6026         for (cur = folderlist; cur != NULL; cur = g_list_next(cur)) {
6027                 Folder *folder = (Folder *) cur->data;
6028
6029                 if (folder->klass == &imap_class) {
6030                         if (imap_is_busy(folder)) {
6031                                 IMAPSession *imap_session;
6032                                 RemoteFolder *rfolder;
6033
6034                                 g_printerr("cancelled\n");
6035                                 imap_threaded_cancel(folder);
6036                                 rfolder = (RemoteFolder *) folder;
6037                                 imap_session = (IMAPSession *) rfolder->session;
6038                                 if (imap_session)
6039                                         imap_session->cancelled = 1;
6040                         }
6041                 }
6042         }
6043 }
6044
6045 gboolean imap_cancel_all_enabled(void)
6046 {
6047         GList *folderlist;
6048         GList *cur;
6049
6050         folderlist = folder_get_list();
6051         for (cur = folderlist; cur != NULL; cur = g_list_next(cur)) {
6052                 Folder *folder = (Folder *) cur->data;
6053
6054                 if (folder->klass == &imap_class) {
6055                         if (imap_is_busy(folder)) {
6056                                 return TRUE;
6057                         }
6058                 }
6059         }
6060
6061         return FALSE;
6062 }
6063
6064 static gboolean imap_is_busy(Folder *folder)
6065 {
6066         IMAPSession *imap_session;
6067         RemoteFolder *rfolder;
6068
6069         rfolder = (RemoteFolder *) folder;
6070         imap_session = (IMAPSession *) rfolder->session;
6071         if (imap_session == NULL)
6072                 return FALSE;
6073
6074         return imap_session->busy;
6075 }
6076
6077 #else /* HAVE_LIBETPAN */
6078
6079 static FolderClass imap_class;
6080
6081 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item);
6082 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag);
6083
6084 static Folder   *imap_folder_new        (const gchar    *name,
6085                                          const gchar    *path)
6086 {
6087         static gboolean missing_imap_warning = TRUE;
6088         if (missing_imap_warning) {
6089                 missing_imap_warning = FALSE;
6090                 alertpanel_error(
6091                         _("You have one or more IMAP accounts "
6092                           "defined. However this version of "
6093                           "Claws Mail has been built without "
6094                           "IMAP support; your IMAP account(s) are "
6095                           "disabled.\n\n"
6096                           "You probably need to "
6097                           "install libetpan and recompile "
6098                           "Claws Mail."));
6099         }
6100         return NULL;
6101 }
6102 static gint     imap_create_tree        (Folder         *folder)
6103 {
6104         return -1;
6105 }
6106 static FolderItem *imap_create_folder   (Folder         *folder,
6107                                          FolderItem     *parent,
6108                                          const gchar    *name)
6109 {
6110         return NULL;
6111 }
6112 static gint     imap_rename_folder      (Folder         *folder,
6113                                          FolderItem     *item,
6114                                          const gchar    *name)
6115 {
6116         return -1;
6117 }
6118
6119 gchar imap_get_path_separator_for_item(FolderItem *item)
6120 {
6121         return '/';
6122 }
6123
6124 FolderClass *imap_get_class(void)
6125 {
6126         if (imap_class.idstr == NULL) {
6127                 imap_class.type = F_IMAP;
6128                 imap_class.idstr = "imap";
6129                 imap_class.uistr = "IMAP4";
6130
6131                 imap_class.new_folder = imap_folder_new;
6132                 imap_class.create_tree = imap_create_tree;
6133                 imap_class.create_folder = imap_create_folder;
6134                 imap_class.rename_folder = imap_rename_folder;
6135
6136                 imap_class.set_xml = folder_set_xml;
6137                 imap_class.get_xml = folder_get_xml;
6138                 imap_class.item_set_xml = imap_item_set_xml;
6139                 imap_class.item_get_xml = imap_item_get_xml;
6140                 /* nothing implemented */
6141         }
6142
6143         return &imap_class;
6144 }
6145
6146 void imap_disconnect_all(gboolean have_connectivity)
6147 {
6148 }
6149
6150 gint imap_subscribe(Folder *folder, FolderItem *item, gchar *rpath, gboolean sub)
6151 {
6152         return -1;
6153 }
6154
6155 GList * imap_scan_subtree(Folder *folder, FolderItem *item, gboolean unsubs_only, gboolean recursive)
6156 {
6157         return NULL;
6158 }
6159
6160 void imap_cache_msg(FolderItem *item, gint msgnum)
6161 {
6162 }
6163
6164 void imap_cancel_all(void)
6165 {
6166 }
6167
6168 gboolean imap_cancel_all_enabled(void)
6169 {
6170         return FALSE;
6171 }
6172
6173 #endif
6174
6175 #ifdef HAVE_LIBETPAN
6176 static void imap_synchronise(FolderItem *item, gint days)
6177 {
6178         if (IMAP_FOLDER_ITEM(item)->last_sync == IMAP_FOLDER_ITEM(item)->last_change) {
6179                 debug_print("%s already synced\n", item->path?item->path:item->name);
6180                 return;
6181         }
6182         debug_print("syncing %s\n", item->path?item->path:item->name);
6183         imap_gtk_synchronise(item, days);
6184         IMAP_FOLDER_ITEM(item)->last_sync = IMAP_FOLDER_ITEM(item)->last_change;
6185 }
6186 #endif
6187
6188 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag)
6189 {
6190 #ifdef HAVE_LIBETPAN
6191         GList *cur;
6192 #endif
6193         folder_item_set_xml(folder, item, tag);
6194
6195 #ifdef HAVE_LIBETPAN
6196         for (cur = tag->attr; cur != NULL; cur = g_list_next(cur)) {
6197                 XMLAttr *attr = (XMLAttr *) cur->data;
6198
6199                 if (!attr || !attr->name || !attr->value) continue;
6200                 if (!strcmp(attr->name, "uidnext"))
6201                         IMAP_FOLDER_ITEM(item)->uid_next = atoi(attr->value);
6202                 if (!strcmp(attr->name, "last_sync"))
6203                         IMAP_FOLDER_ITEM(item)->last_sync = atoi(attr->value);
6204                 if (!strcmp(attr->name, "last_change"))
6205                         IMAP_FOLDER_ITEM(item)->last_change = atoi(attr->value);
6206         }
6207         if (IMAP_FOLDER_ITEM(item)->last_change == 0)
6208                 IMAP_FOLDER_ITEM(item)->last_change = time(NULL);
6209 #endif
6210 }
6211
6212 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item)
6213 {
6214         XMLTag *tag;
6215
6216         tag = folder_item_get_xml(folder, item);
6217
6218 #ifdef HAVE_LIBETPAN
6219         xml_tag_add_attr(tag, xml_attr_new_int("uidnext",
6220                         IMAP_FOLDER_ITEM(item)->uid_next));
6221         xml_tag_add_attr(tag, xml_attr_new_int("last_sync",
6222                         IMAP_FOLDER_ITEM(item)->last_sync));
6223         xml_tag_add_attr(tag, xml_attr_new_int("last_change",
6224                         IMAP_FOLDER_ITEM(item)->last_change));
6225
6226 #endif
6227         return tag;
6228 }
6229
6230 /* ===================================================================
6231  * UTF-7 conversion routines as in RFC 2192
6232  * ===================================================================
6233  * These two functions from:
6234  * libimap library.
6235  * Copyright (C) 2003-2004 Pawel Salek. */
6236
6237 /* UTF7 modified base64 alphabet */
6238 static char base64chars[] =
6239   "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+,";
6240 #define UNDEFINED 64
6241
6242 /* UTF16 definitions */
6243 #define UTF16MASK       0x03FFUL
6244 #define UTF16SHIFT      10
6245 #define UTF16BASE       0x10000UL
6246 #define UTF16HIGHSTART  0xD800UL
6247 #define UTF16HIGHEND    0xDBFFUL
6248 #define UTF16LOSTART    0xDC00UL
6249 #define UTF16LOEND      0xDFFFUL
6250
6251
6252 /* Convert an IMAP mailbox to a UTF-8 string.
6253  *  dst needs to have roughly 4 times the storage space of src
6254  *    Hex encoding can triple the size of the input
6255  *    UTF-7 can be slightly denser than UTF-8
6256  *     (worst case: 8 octets UTF-7 becomes 9 octets UTF-8)
6257  */
6258 char* imap_modified_utf7_to_utf8(const char *mbox, gboolean change_spaces)
6259 {
6260   unsigned c, i, bitcount;
6261   unsigned long ucs4, utf16, bitbuf;
6262   unsigned char base64[256];
6263   const char *src;
6264   char *dst, *res  = g_malloc(2*strlen(mbox)+1);
6265
6266   dst = res;
6267   src = mbox;
6268   if(!dst) return NULL;
6269   /* initialize modified base64 decoding table */
6270   memset(base64, UNDEFINED, sizeof (base64));
6271   for (i = 0; i < sizeof (base64chars); ++i) {
6272     base64[(unsigned)base64chars[i]] = i;
6273   }
6274
6275   /* loop until end of string */
6276   while (*src != '\0') {
6277     c = *src++;
6278     /* deal with literal characters and &- */
6279     if (c != '&' || *src == '-') {
6280       /* encode literally */
6281       if (change_spaces && c == '_')
6282         *dst++ = ' ';
6283       else
6284         *dst++ = c;
6285       /* skip over the '-' if this is an &- sequence */
6286       if (c == '&') ++src;
6287     } else {
6288       /* convert modified UTF-7 -> UTF-16 -> UCS-4 -> UTF-8 -> HEX */
6289       bitbuf = 0;
6290       bitcount = 0;
6291       ucs4 = 0;
6292       while ((c = base64[(unsigned char) *src]) != UNDEFINED) {
6293         ++src;
6294         bitbuf = (bitbuf << 6) | c;
6295         bitcount += 6;
6296         /* enough bits for a UTF-16 character? */
6297         if (bitcount >= 16) {
6298           bitcount -= 16;
6299           utf16 = (bitcount ? bitbuf >> bitcount
6300                    : bitbuf) & 0xffff;
6301           /* convert UTF16 to UCS4 */
6302           if
6303             (utf16 >= UTF16HIGHSTART && utf16 <= UTF16HIGHEND) {
6304             ucs4 = (utf16 - UTF16HIGHSTART) << UTF16SHIFT;
6305             continue;
6306           } else if
6307             (utf16 >= UTF16LOSTART && utf16 <= UTF16LOEND) {
6308             ucs4 += utf16 - UTF16LOSTART + UTF16BASE;
6309           } else {
6310             ucs4 = utf16;
6311           }
6312
6313           /* convert UTF-16 range of UCS4 to UTF-8 */
6314           if (ucs4 <= 0x7fUL) {
6315             dst[0] = ucs4;
6316             dst += 1;
6317           } else if (ucs4 <= 0x7ffUL) {
6318             dst[0] = 0xc0 | (ucs4 >> 6);
6319             dst[1] = 0x80 | (ucs4 & 0x3f);
6320             dst += 2;
6321           } else if (ucs4 <= 0xffffUL) {
6322             dst[0] = 0xe0 | (ucs4 >> 12);
6323             dst[1] = 0x80 | ((ucs4 >> 6) & 0x3f);
6324             dst[2] = 0x80 | (ucs4 & 0x3f);
6325             dst += 3;
6326           } else {
6327             dst[0] = 0xf0 | (ucs4 >> 18);
6328             dst[1] = 0x80 | ((ucs4 >> 12) & 0x3f);
6329             dst[2] = 0x80 | ((ucs4 >> 6) & 0x3f);
6330             dst[3] = 0x80 | (ucs4 & 0x3f);
6331             dst += 4;
6332           }
6333         }
6334       }
6335       /* skip over trailing '-' in modified UTF-7 encoding */
6336       if (*src == '-') ++src;
6337     }
6338   }
6339   /* terminate destination string */
6340   *dst = '\0';
6341   return res;
6342 }
6343
6344 /* Convert hex coded UTF-8 string to modified UTF-7 IMAP mailbox
6345  *  dst should be about twice the length of src to deal with non-hex
6346  *  coded URLs
6347  */
6348 char* imap_utf8_to_modified_utf7(const char *src, gboolean change_spaces)
6349 {
6350   unsigned int utf8pos, utf8total, c, utf7mode, bitstogo, utf16flag;
6351   unsigned long ucs4 = 0, bitbuf = 0;
6352
6353   /* initialize hex lookup table */
6354   char *dst, *res;
6355
6356   if (!src) return NULL;
6357
6358   res = malloc(2*strlen(src)+1);
6359   dst = res;
6360   if(!dst) return NULL;
6361
6362   utf7mode = 0;
6363   utf8total = 0;
6364   bitstogo = 0;
6365   utf8pos = 0;
6366   while ((c = (unsigned char)*src) != '\0') {
6367     ++src;
6368     /* normal character? */
6369     if (c >= ' ' && c <= '~' && (c != '_' || !change_spaces)) {
6370       /* switch out of UTF-7 mode */
6371       if (utf7mode) {
6372         if (bitstogo) {
6373           *dst++ = base64chars[(bitbuf << (6 - bitstogo)) & 0x3F];
6374         }
6375         *dst++ = '-';
6376         utf7mode = 0;
6377         utf8pos  = 0;
6378         bitstogo = 0;
6379         utf8total= 0;
6380       }
6381       if (change_spaces && c == ' ')
6382         *dst++ = '_';
6383       else
6384         *dst++ = c;
6385       /* encode '&' as '&-' */
6386       if (c == '&') {
6387         *dst++ = '-';
6388       }
6389       continue;
6390     }
6391     /* switch to UTF-7 mode */
6392     if (!utf7mode) {
6393       *dst++ = '&';
6394       utf7mode = 1;
6395     }
6396     /* Encode US-ASCII characters as themselves */
6397     if (c < 0x80) {
6398       ucs4 = c;
6399     } else if (utf8total) {
6400       /* save UTF8 bits into UCS4 */
6401       ucs4 = (ucs4 << 6) | (c & 0x3FUL);
6402       if (++utf8pos < utf8total) {
6403         continue;
6404       }
6405     } else {
6406       utf8pos = 1;
6407       if (c < 0xE0) {
6408         utf8total = 2;
6409         ucs4 = c & 0x1F;
6410       } else if (c < 0xF0) {
6411         utf8total = 3;
6412         ucs4 = c & 0x0F;
6413       } else {
6414         /* NOTE: can't convert UTF8 sequences longer than 4 */
6415         utf8total = 4;
6416         ucs4 = c & 0x03;
6417       }
6418       continue;
6419     }
6420     /* loop to split ucs4 into two utf16 chars if necessary */
6421     utf8total = 0;
6422     do {
6423       if (ucs4 >= UTF16BASE) {
6424         ucs4 -= UTF16BASE;
6425         bitbuf = (bitbuf << 16) | ((ucs4 >> UTF16SHIFT)
6426                                    + UTF16HIGHSTART);
6427         ucs4 = (ucs4 & UTF16MASK) + UTF16LOSTART;
6428         utf16flag = 1;
6429       } else {
6430         bitbuf = (bitbuf << 16) | ucs4;
6431         utf16flag = 0;
6432       }
6433       bitstogo += 16;
6434       /* spew out base64 */
6435       while (bitstogo >= 6) {
6436         bitstogo -= 6;
6437         *dst++ = base64chars[(bitstogo ? (bitbuf >> bitstogo)
6438                               : bitbuf)
6439                              & 0x3F];
6440       }
6441     } while (utf16flag);
6442   }
6443   /* if in UTF-7 mode, finish in ASCII */
6444   if (utf7mode) {
6445     if (bitstogo) {
6446       *dst++ = base64chars[(bitbuf << (6 - bitstogo)) & 0x3F];
6447     }
6448     *dst++ = '-';
6449   }
6450   /* tie off string */
6451   *dst = '\0';
6452   return res;
6453 }