src/imap.c

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