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