src/imap.c

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