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 = FALSE;
2171         IMAPSession *session;
2172
2173         if (on_server == NULL || !*on_server) {
2174                 return folder_item_search_msgs_local(folder, container, msgs, on_server,
2175                                 predicate, progress_cb, progress_data);
2176         }
2177
2178         for (cur = predicate->matchers; cur != NULL; cur = cur->next) {
2179                 IMAPSearchKey* matcherPart = NULL;
2180                 MatcherProp* prop = (MatcherProp*) cur->data;
2181                 gboolean is_all;
2182
2183                 matcherPart = search_make_key(prop, &is_all);
2184
2185                 if (on_server) {
2186                         *on_server &= matcherPart != NULL && prop->matchtype == MATCHTYPE_MATCHCASE;
2187                 }
2188
2189                 if (matcherPart) {
2190                         if (key == NULL) {
2191                                 key = matcherPart;
2192                                 server_filtering_useless = is_all;
2193                         } else if (predicate->bool_and) {
2194                                 key = imap_search_and(key, matcherPart);
2195                                 server_filtering_useless &= is_all;
2196                         } else {
2197                                 key = imap_search_or(key, matcherPart);
2198                                 server_filtering_useless |= is_all;
2199                         }
2200                 }
2201         }
2202
2203         if (server_filtering_useless) {
2204                 imap_search_free(key);
2205                 key = NULL;
2206         }
2207
2208         if (key == NULL && progress_cb != NULL) {
2209                 GSList* cur;
2210                 GSList* list;
2211                 int count = 0;
2212
2213                 progress_cb(progress_data, TRUE, 0, 0, container->total_msgs);
2214                 progress_cb(progress_data, TRUE, container->total_msgs, 0, container->total_msgs);
2215
2216                 list = folder_item_get_msg_list(container);
2217                 for (cur = list; cur != NULL; cur = cur->next) {
2218                         *msgs = g_slist_prepend(*msgs, GUINT_TO_POINTER(((MsgInfo*) cur->data)->msgnum));
2219                         count++;
2220                 }
2221                 *msgs = g_slist_reverse(*msgs);
2222                 return count;
2223         }
2224
2225         session = imap_session_get(folder);
2226         if (!session) {
2227                 return -1;
2228         }
2229         result = imap_select(session, IMAP_FOLDER(folder), FOLDER_ITEM(container),
2230                          NULL, NULL, NULL, NULL, NULL, TRUE);
2231         if (result != MAILIMAP_NO_ERROR)
2232                 return -1;
2233
2234         if (progress_cb)
2235                 progress_cb(progress_data, TRUE, 0, 0, container->total_msgs);
2236         result = imap_threaded_search(folder, IMAP_SEARCH_TYPE_KEYED, key, NULL, &uidlist);
2237         if (progress_cb)
2238                 progress_cb(progress_data, TRUE, container->total_msgs, 0, container->total_msgs);
2239
2240         if (result == MAILIMAP_NO_ERROR) {
2241                 gint result = 0;
2242
2243                 *msgs = imap_uid_list_from_lep(uidlist, &result);
2244                 mailimap_search_result_free(uidlist);
2245
2246                 return result;
2247         } else {
2248                 return -1;
2249         }
2250 }
2251
2252
2253 static gint imap_do_remove_msgs(Folder *folder, FolderItem *dest,
2254                                 MsgInfoList *msglist, GHashTable *relation)
2255 {
2256         gchar *destdir, *dir;
2257         GSList *numlist = NULL, *cur;
2258         MsgInfo *msginfo;
2259         IMAPSession *session;
2260         gint ok = MAILIMAP_NO_ERROR;
2261
2262         g_return_val_if_fail(folder != NULL, -1);
2263         g_return_val_if_fail(dest != NULL, -1);
2264         g_return_val_if_fail(msglist != NULL, -1);
2265
2266         debug_print("getting session...\n");
2267         session = imap_session_get(folder);
2268         if (!session) {
2269                 return -1;
2270         }
2271
2272         lock_session(session); /* unlocked later in the function */
2273
2274         msginfo = (MsgInfo *)msglist->data;
2275
2276         ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
2277                          NULL, NULL, NULL, NULL, NULL, FALSE);
2278         if (ok != MAILIMAP_NO_ERROR) {
2279                 return ok;
2280         }
2281
2282         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
2283         if (is_fatal(ok)) {
2284                 g_free(destdir);
2285                 return ok;
2286         }
2287         for (cur = msglist; cur; cur = cur->next) {
2288                 msginfo = (MsgInfo *)cur->data;
2289                 if (!MSG_IS_DELETED(msginfo->flags))
2290                         numlist = g_slist_prepend(numlist, GINT_TO_POINTER(msginfo->msgnum));
2291         }
2292         numlist = g_slist_reverse(numlist);
2293
2294         if (numlist != NULL) {
2295                 ok = imap_set_message_flags
2296                         (session, IMAP_FOLDER_ITEM(msginfo->folder), numlist, IMAP_FLAG_DELETED, NULL, TRUE);
2297                 if (ok != MAILIMAP_NO_ERROR) {
2298                         log_warning(LOG_PROTOCOL, _("can't set deleted flags\n"));
2299                         g_free(destdir);
2300                         return ok;
2301                 }
2302         } /* else we just need to expunge */
2303         ok = imap_cmd_expunge(session, folder->account->imap_use_trash);
2304         if (ok != MAILIMAP_NO_ERROR) {
2305                 log_warning(LOG_PROTOCOL, _("can't expunge\n"));
2306                 g_free(destdir);
2307                 return ok;
2308         }
2309
2310         session->folder_content_changed = TRUE;
2311         unlock_session(session);
2312
2313         dir = folder_item_get_path(msginfo->folder);
2314         if (is_dir_exist(dir)) {
2315                 for (cur = msglist; cur; cur = cur->next) {
2316                         msginfo = (MsgInfo *)cur->data;
2317                         remove_numbered_files(dir, msginfo->msgnum, msginfo->msgnum);
2318                 }
2319         }
2320         g_free(dir);
2321
2322         g_slist_free(numlist);
2323
2324         imap_scan_required(folder, dest);
2325
2326         g_free(destdir);
2327         if (ok == MAILIMAP_NO_ERROR)
2328                 return 0;
2329         else
2330                 return -1;
2331 }
2332
2333 static gint imap_remove_msgs(Folder *folder, FolderItem *dest,
2334                     MsgInfoList *msglist, GHashTable *relation)
2335 {
2336         MsgInfo *msginfo;
2337
2338         g_return_val_if_fail(folder != NULL, -1);
2339         g_return_val_if_fail(dest != NULL, -1);
2340         if (msglist == NULL)
2341                 return 0;
2342
2343         msginfo = (MsgInfo *)msglist->data;
2344         g_return_val_if_fail(msginfo->folder != NULL, -1);
2345
2346         return imap_do_remove_msgs(folder, dest, msglist, relation);
2347 }
2348
2349 static gint imap_remove_all_msg(Folder *folder, FolderItem *item)
2350 {
2351         GSList *list = folder_item_get_msg_list(item);
2352         gint res = imap_remove_msgs(folder, item, list, NULL);
2353         procmsg_msg_list_free(list);
2354         return res;
2355 }
2356
2357 static gboolean imap_is_msg_changed(Folder *folder, FolderItem *item,
2358                                     MsgInfo *msginfo)
2359 {
2360         /* TODO: properly implement this method */
2361         return FALSE;
2362 }
2363
2364 static gint imap_close(Folder *folder, FolderItem *item)
2365 {
2366         return 0;
2367 }
2368
2369 static gint imap_scan_tree_real(Folder *folder, gboolean subs_only)
2370 {
2371         FolderItem *item = NULL;
2372         IMAPSession *session;
2373         gchar *root_folder = NULL;
2374
2375         g_return_val_if_fail(folder != NULL, -1);
2376         g_return_val_if_fail(folder->account != NULL, -1);
2377
2378         debug_print("getting session...\n");
2379         session = imap_session_get(folder);
2380         if (!session) {
2381                 if (!folder->node) {
2382                         folder_tree_destroy(folder);
2383                         item = folder_item_new(folder, folder->name, NULL);
2384                         item->folder = folder;
2385                         folder->node = item->node = g_node_new(item);
2386                 }
2387                 return -1;
2388         }
2389
2390         if (folder->account->imap_dir && *folder->account->imap_dir) {
2391                 gchar *real_path;
2392                 int r = MAILIMAP_NO_ERROR;
2393                 clist * lep_list;
2394
2395                 Xstrdup_a(root_folder, folder->account->imap_dir, {return -1;});
2396                 extract_quote(root_folder, '"');
2397                 subst_char(root_folder,
2398                            imap_get_path_separator(session, IMAP_FOLDER(folder),
2399                                                    root_folder, &r),
2400                            '/');
2401                 if (is_fatal(r))
2402                         return -1;
2403                 strtailchomp(root_folder, '/');
2404                 real_path = imap_get_real_path
2405                         (session, IMAP_FOLDER(folder), root_folder, &r);
2406                 if (is_fatal(r))
2407                         return -1;
2408                 debug_print("IMAP root directory: %s\n", real_path);
2409
2410                 /* check if root directory exist */
2411
2412                 r = imap_threaded_list(session->folder, "", real_path,
2413                                        &lep_list);
2414
2415                 if (r != MAILIMAP_NO_ERROR)
2416                         imap_handle_error(SESSION(session), NULL, r);
2417
2418                 if ((r != MAILIMAP_NO_ERROR) || (clist_count(lep_list) == 0)) {
2419                         if (!folder->node) {
2420                                 item = folder_item_new(folder, folder->name, NULL);
2421                                 item->folder = folder;
2422                                 folder->node = item->node = g_node_new(item);
2423                         }
2424                         return -1;
2425                 }
2426                 mailimap_list_result_free(lep_list);
2427
2428                 g_free(real_path);
2429         }
2430
2431         if (folder->node)
2432                 item = FOLDER_ITEM(folder->node->data);
2433
2434         if (item && !item->path && root_folder) {
2435                 item->path = g_strdup(root_folder);
2436         }
2437
2438         if (!item || ((item->path || root_folder) &&
2439                       strcmp2(item->path, root_folder) != 0)) {
2440                 folder_tree_destroy(folder);
2441                 item = folder_item_new(folder, folder->name, root_folder);
2442                 item->folder = folder;
2443                 folder->node = item->node = g_node_new(item);
2444         }
2445
2446         imap_scan_tree_recursive(session, FOLDER_ITEM(folder->node->data), subs_only);
2447         imap_create_missing_folders(folder);
2448
2449         return 0;
2450 }
2451
2452 static gint imap_scan_tree(Folder *folder)
2453 {
2454         gboolean subs_only = FALSE;
2455         if (folder->account) {
2456                 debug_print(" scanning only subs %d\n", folder->account->imap_subsonly);
2457                 subs_only = folder->account->imap_subsonly;
2458         }
2459         return imap_scan_tree_real(folder, subs_only);
2460 }
2461
2462 static gint imap_scan_tree_recursive(IMAPSession *session, FolderItem *item, gboolean subs_only)
2463 {
2464         Folder *folder;
2465         IMAPFolder *imapfolder;
2466         FolderItem *new_item;
2467         GSList *item_list, *cur;
2468         GNode *node;
2469         gchar *real_path;
2470         gchar *wildcard_path;
2471         gchar separator;
2472         gchar wildcard[3];
2473         clist * lep_list;
2474         int r = MAILIMAP_NO_ERROR;
2475
2476         g_return_val_if_fail(item != NULL, -1);
2477         g_return_val_if_fail(item->folder != NULL, -1);
2478         g_return_val_if_fail(item->no_sub == FALSE, -1);
2479
2480         folder = item->folder;
2481         imapfolder = IMAP_FOLDER(folder);
2482
2483         separator = imap_get_path_separator(session, imapfolder, item->path, &r);
2484         if (is_fatal(r))
2485                 return r;
2486
2487         if (folder->ui_func)
2488                 folder->ui_func(folder, item, folder->ui_func_data);
2489
2490         if (item->path) {
2491                 wildcard[0] = separator;
2492                 wildcard[1] = '%';
2493                 wildcard[2] = '\0';
2494                 real_path = imap_get_real_path(session, imapfolder, item->path, &r);
2495                 if (is_fatal(r)) {
2496                         g_free(real_path);
2497                         return r;
2498                 }
2499         } else {
2500                 wildcard[0] = '%';
2501                 wildcard[1] = '\0';
2502                 real_path = g_strdup("");
2503         }
2504
2505         Xstrcat_a(wildcard_path, real_path, wildcard,
2506                   {g_free(real_path); return MAILIMAP_ERROR_BAD_STATE;});
2507         lep_list = NULL;
2508
2509         if (subs_only)
2510                 r = imap_threaded_lsub(folder, "", wildcard_path, &lep_list);
2511         else
2512                 r = imap_threaded_list(folder, "", wildcard_path, &lep_list);
2513
2514         if (r != MAILIMAP_NO_ERROR) {
2515                 imap_handle_error(SESSION(session), NULL, r);
2516                 item_list = NULL;
2517                 g_free(real_path);
2518                 return r;
2519         }
2520         else {
2521                 item_list = imap_list_from_lep(imapfolder,
2522                                                lep_list, real_path, FALSE);
2523                 mailimap_list_result_free(lep_list);
2524         }
2525
2526         g_free(real_path);
2527
2528         node = item->node->children;
2529         while (node != NULL) {
2530                 FolderItem *old_item = FOLDER_ITEM(node->data);
2531                 GNode *next = node->next;
2532
2533                 new_item = NULL;
2534                 for (cur = item_list; cur != NULL; cur = cur->next) {
2535                         FolderItem *cur_item = FOLDER_ITEM(cur->data);
2536                         if (!strcmp2(old_item->path, cur_item->path)) {
2537                                 new_item = cur_item;
2538                                 break;
2539                         }
2540                 }
2541                 if (!new_item) {
2542                         if (old_item && old_item->path && !strcmp(old_item->path, "INBOX")) {
2543                                 debug_print("not removing INBOX\n");
2544                         } else {
2545                                 debug_print("folder '%s' not found. removing...\n",
2546                                             old_item->path);
2547                                 folder_item_remove(old_item);
2548                         }
2549                 } else {
2550                         old_item->no_sub = new_item->no_sub;
2551                         old_item->no_select = new_item->no_select;
2552                         if (old_item->no_sub == TRUE && node->children) {
2553                                 debug_print("folder '%s' doesn't have "
2554                                             "subfolders. removing...\n",
2555                                             old_item->path);
2556                                 folder_item_remove_children(old_item);
2557                         }
2558                 }
2559
2560                 node = next;
2561         }
2562
2563         for (cur = item_list; cur != NULL; cur = cur->next) {
2564                 FolderItem *cur_item = FOLDER_ITEM(cur->data);
2565                 new_item = NULL;
2566
2567                 for (node = item->node->children; node != NULL;
2568                      node = node->next) {
2569                         if (!strcmp2(FOLDER_ITEM(node->data)->path,
2570                                      cur_item->path)) {
2571                                 new_item = FOLDER_ITEM(node->data);
2572                                 folder_item_destroy(cur_item);
2573                                 cur_item = NULL;
2574                                 break;
2575                         }
2576                 }
2577                 if (!new_item) {
2578                         new_item = cur_item;
2579                         debug_print("new folder '%s' found.\n", new_item->path);
2580                         folder_item_append(item, new_item);
2581                 }
2582
2583                 if (!strcmp(new_item->path, "INBOX")) {
2584                         new_item->stype = F_INBOX;
2585                         folder->inbox = new_item;
2586                 } else if (!folder_item_parent(item) || item->stype == F_INBOX) {
2587                         gchar *base;
2588
2589                         base = g_path_get_basename(new_item->path);
2590
2591                         if (!folder->outbox && !g_ascii_strcasecmp(base, "Sent")) {
2592                                 new_item->stype = F_OUTBOX;
2593                                 folder->outbox = new_item;
2594                         } else if (!folder->draft && !g_ascii_strcasecmp(base, "Drafts")) {
2595                                 new_item->stype = F_DRAFT;
2596                                 folder->draft = new_item;
2597                         } else if (!folder->queue && !g_ascii_strcasecmp(base, "Queue")) {
2598                                 new_item->stype = F_QUEUE;
2599                                 folder->queue = new_item;
2600                         } else if (!folder->trash && !g_ascii_strcasecmp(base, "Trash")) {
2601                                 new_item->stype = F_TRASH;
2602                                 folder->trash = new_item;
2603                         }
2604                         g_free(base);
2605                 }
2606
2607                 if (new_item->no_sub == FALSE)
2608                         imap_scan_tree_recursive(session, new_item, subs_only);
2609         }
2610
2611         g_slist_free(item_list);
2612
2613         return MAILIMAP_NO_ERROR;
2614 }
2615
2616 GList *imap_scan_subtree(Folder *folder, FolderItem *item, gboolean unsubs_only, gboolean recursive)
2617 {
2618         IMAPSession *session = imap_session_get(folder);
2619         gchar *real_path;
2620         gchar *wildcard_path;
2621         gchar separator;
2622         gchar wildcard[3];
2623         clist * lep_list;
2624         GSList *item_list = NULL, *cur;
2625         GList *child_list = NULL, *tmplist = NULL;
2626         GSList *sub_list = NULL;
2627         int r = MAILIMAP_NO_ERROR;
2628
2629         if (!session)
2630                 return NULL;
2631
2632         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &r);
2633         if (is_fatal(r))
2634                 return NULL;
2635
2636         if (item->path) {
2637                 wildcard[0] = separator;
2638                 wildcard[1] = '%';
2639                 wildcard[2] = '\0';
2640                 real_path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &r);
2641                 if (is_fatal(r)) {
2642                         g_free(real_path);
2643                         return NULL;
2644                 }
2645         } else {
2646                 wildcard[0] = '%';
2647                 wildcard[1] = '\0';
2648                 real_path = g_strdup("");
2649         }
2650
2651         Xstrcat_a(wildcard_path, real_path, wildcard,
2652                   {g_free(real_path); return NULL;});
2653         lep_list = NULL;
2654
2655         if (unsubs_only)
2656                 statusbar_print_all(_("Looking for unsubscribed folders in %s..."),
2657                                 item->path?item->path:item->name);
2658         else
2659                 statusbar_print_all(_("Looking for subfolders of %s..."),
2660                                 item->path?item->path:item->name);
2661
2662         r = imap_threaded_list(folder, "", wildcard_path, &lep_list);
2663         if (r) {
2664                 g_free(real_path);
2665                 statusbar_pop_all();
2666                 return NULL;
2667         }
2668         item_list = imap_list_from_lep(IMAP_FOLDER(folder),
2669                                lep_list, real_path, FALSE);
2670         mailimap_list_result_free(lep_list);
2671
2672         for (cur = item_list; cur != NULL; cur = cur->next) {
2673                 FolderItem *cur_item = FOLDER_ITEM(cur->data);
2674                 if (recursive) {
2675                         tmplist = imap_scan_subtree(folder, cur_item,
2676                                         unsubs_only, recursive);
2677                         if (tmplist)
2678                                 child_list = g_list_concat(child_list, tmplist);
2679                 }
2680                 child_list = g_list_prepend(child_list,
2681                                 imap_get_real_path(session,
2682                                         IMAP_FOLDER(folder), cur_item->path, &r));
2683                 if (is_fatal(r)) {
2684                         g_free(real_path);
2685                         statusbar_pop_all();
2686                         return NULL;
2687                 }
2688                 folder_item_destroy(cur_item);
2689         }
2690         child_list = g_list_reverse(child_list);
2691         g_slist_free(item_list);
2692
2693         if (unsubs_only) {
2694                 r = imap_threaded_lsub(folder, "", wildcard_path, &lep_list);
2695                 if (r) {
2696                         g_free(real_path);
2697                         statusbar_pop_all();
2698                         return NULL;
2699                 }
2700                 sub_list = imap_list_from_lep(IMAP_FOLDER(folder),
2701                                        lep_list, real_path, FALSE);
2702                 mailimap_list_result_free(lep_list);
2703
2704                 for (cur = sub_list; cur != NULL; cur = cur->next) {
2705                         FolderItem *cur_item = FOLDER_ITEM(cur->data);
2706                         GList *oldlitem = NULL;
2707                         gchar *tmp = imap_get_real_path(session,
2708                                         IMAP_FOLDER(folder), cur_item->path, &r);
2709                         if (r) {
2710                                 g_free(real_path);
2711                                 statusbar_pop_all();
2712                                 return NULL;
2713                         }
2714                         folder_item_destroy(cur_item);
2715                         oldlitem = g_list_find_custom(
2716                                         child_list, tmp, (GCompareFunc)strcmp2);
2717                         if (oldlitem) {
2718                                 child_list = g_list_remove_link(child_list, oldlitem);
2719                                 g_free(oldlitem->data);
2720                                 g_list_free(oldlitem);
2721                         }
2722                         g_free(tmp);
2723                 }
2724         }
2725
2726         g_free(real_path);
2727         statusbar_pop_all();
2728
2729         return child_list;
2730 }
2731
2732 static gint imap_create_tree(Folder *folder)
2733 {
2734         g_return_val_if_fail(folder != NULL, -1);
2735         g_return_val_if_fail(folder->node != NULL, -1);
2736         g_return_val_if_fail(folder->node->data != NULL, -1);
2737         g_return_val_if_fail(folder->account != NULL, -1);
2738
2739         imap_scan_tree(folder);
2740         imap_create_missing_folders(folder);
2741
2742         return 0;
2743 }
2744
2745 static void imap_create_missing_folders(Folder *folder)
2746 {
2747         g_return_if_fail(folder != NULL);
2748
2749         if (!folder->inbox)
2750                 folder->inbox = imap_create_special_folder
2751                         (folder, F_INBOX, "INBOX");
2752         if (!folder->trash)
2753                 folder->trash = imap_create_special_folder
2754                         (folder, F_TRASH, "Trash");
2755         if (!folder->queue)
2756                 folder->queue = imap_create_special_folder
2757                         (folder, F_QUEUE, "Queue");
2758         if (!folder->outbox)
2759                 folder->outbox = imap_create_special_folder
2760                         (folder, F_OUTBOX, "Sent");
2761         if (!folder->draft)
2762                 folder->draft = imap_create_special_folder
2763                         (folder, F_DRAFT, "Drafts");
2764 }
2765
2766 static FolderItem *imap_create_special_folder(Folder *folder,
2767                                               SpecialFolderItemType stype,
2768                                               const gchar *name)
2769 {
2770         FolderItem *item;
2771         FolderItem *new_item;
2772
2773         g_return_val_if_fail(folder != NULL, NULL);
2774         g_return_val_if_fail(folder->node != NULL, NULL);
2775         g_return_val_if_fail(folder->node->data != NULL, NULL);
2776         g_return_val_if_fail(folder->account != NULL, NULL);
2777         g_return_val_if_fail(name != NULL, NULL);
2778
2779         item = FOLDER_ITEM(folder->node->data);
2780         new_item = imap_create_folder(folder, item, name);
2781
2782         if (!new_item) {
2783                 g_warning("Can't create '%s'\n", name);
2784                 if (!folder->inbox) return NULL;
2785
2786                 new_item = imap_create_folder(folder, folder->inbox, name);
2787                 if (!new_item)
2788                         g_warning("Can't create '%s' under INBOX\n", name);
2789                 else
2790                         new_item->stype = stype;
2791         } else
2792                 new_item->stype = stype;
2793
2794         return new_item;
2795 }
2796
2797 static gchar *imap_folder_get_path(Folder *folder)
2798 {
2799         gchar *folder_path;
2800
2801         g_return_val_if_fail(folder != NULL, NULL);
2802         g_return_val_if_fail(folder->account != NULL, NULL);
2803
2804         folder_path = g_strconcat(get_imap_cache_dir(),
2805                                   G_DIR_SEPARATOR_S,
2806                                   folder->account->recv_server,
2807                                   G_DIR_SEPARATOR_S,
2808                                   folder->account->userid,
2809                                   NULL);
2810
2811         return folder_path;
2812 }
2813
2814 #ifdef G_OS_WIN32
2815 static gchar *imap_encode_unsafe_chars(const gchar *str)
2816 {
2817         gchar *ret = NULL, *o_ret;
2818         gchar *i;
2819         if (!str)
2820                 return NULL;
2821         ret = g_malloc(3*strlen(str)+1);
2822         o_ret = ret;
2823         for (i = str; *i; i++) {
2824                 switch(*i) {
2825                         case ':':
2826                         case '|':
2827                         case '<':
2828                         case '>':
2829                         case '*':
2830                         case '?':
2831                         case '#':
2832                                 *ret++ = '%';
2833                                 *ret++ = '0'+(*i/10);
2834                                 *ret++ = '0'+(*i%10);
2835                                 break;
2836                         default:
2837                                 *ret++ = *i;
2838                 }
2839         }
2840         *ret++ = '\0';
2841         return o_ret;
2842 }
2843 #endif
2844 static gchar *imap_item_get_path(Folder *folder, FolderItem *item)
2845 {
2846         gchar *folder_path, *path;
2847         gchar *item_path = NULL;
2848
2849         g_return_val_if_fail(folder != NULL, NULL);
2850         g_return_val_if_fail(item != NULL, NULL);
2851         folder_path = imap_folder_get_path(folder);
2852
2853         g_return_val_if_fail(folder_path != NULL, NULL);
2854
2855 #ifdef G_OS_UNIX
2856         item_path = g_strdup(item->path);
2857 #else
2858         item_path = imap_encode_unsafe_chars(item->path);
2859 #endif
2860
2861         if (g_path_is_absolute(folder_path)) {
2862                 if (item_path)
2863                         path = g_strconcat(folder_path, G_DIR_SEPARATOR_S,
2864                                            item_path, NULL);
2865                 else
2866                         path = g_strdup(folder_path);
2867         } else {
2868                 if (item_path)
2869                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
2870                                            folder_path, G_DIR_SEPARATOR_S,
2871                                            item_path, NULL);
2872                 else
2873                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
2874                                            folder_path, NULL);
2875         }
2876         g_free(folder_path);
2877         g_free(item_path);
2878 #ifdef G_OS_WIN32
2879         while (strchr(path, '/'))
2880                 *strchr(path, '/') = '\\';
2881 #endif
2882
2883         return path;
2884 }
2885
2886 static FolderItem *imap_create_folder(Folder *folder, FolderItem *parent,
2887                                const gchar *name)
2888 {
2889         gchar *dirpath, *imap_path;
2890         IMAPSession *session;
2891         FolderItem *new_item;
2892         gchar separator;
2893         gchar *new_name;
2894         const gchar *p;
2895         gint ok = MAILIMAP_NO_ERROR;
2896         gboolean no_select = FALSE, no_sub = FALSE;
2897         gboolean exist = FALSE;
2898
2899         g_return_val_if_fail(folder != NULL, NULL);
2900         g_return_val_if_fail(folder->account != NULL, NULL);
2901         g_return_val_if_fail(parent != NULL, NULL);
2902         g_return_val_if_fail(name != NULL, NULL);
2903
2904         debug_print("getting session...\n");
2905         session = imap_session_get(folder);
2906         if (!session) {
2907                 return NULL;
2908         }
2909
2910         if (!folder_item_parent(parent) && strcmp(name, "INBOX") == 0) {
2911                 dirpath = g_strdup(name);
2912         }else if (parent->path)
2913                 dirpath = g_strconcat(parent->path, "/", name, NULL);
2914         else if ((p = strchr(name, '/')) != NULL && *(p + 1) != '\0')
2915                 dirpath = g_strdup(name);
2916         else if (folder->account->imap_dir && *folder->account->imap_dir) {
2917                 gchar *imap_dir;
2918
2919                 Xstrdup_a(imap_dir, folder->account->imap_dir, {return NULL;});
2920                 strtailchomp(imap_dir, '/');
2921                 dirpath = g_strconcat(imap_dir, "/", name, NULL);
2922         } else
2923                 dirpath = g_strdup(name);
2924
2925
2926
2927         /* keep trailing directory separator to create a folder that contains
2928            sub folder */
2929         imap_path = imap_utf8_to_modified_utf7(dirpath, FALSE);
2930
2931         strtailchomp(dirpath, '/');
2932         Xstrdup_a(new_name, name, {
2933                 g_free(dirpath);
2934                 g_free(imap_path);
2935                 return NULL;});
2936
2937         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), imap_path, &ok);
2938         if (is_fatal(ok)) {
2939                 g_free(imap_path);
2940                 return NULL;
2941         }
2942         imap_path_separator_subst(imap_path, separator);
2943         /* remove trailing / for display */
2944         strtailchomp(new_name, '/');
2945
2946         if (strcmp(dirpath, "INBOX") != 0) {
2947                 GPtrArray *argbuf;
2948                 int r;
2949                 clist * lep_list;
2950
2951                 argbuf = g_ptr_array_new();
2952                 r = imap_threaded_list(folder, "", imap_path, &lep_list);
2953                 if (r != MAILIMAP_NO_ERROR) {
2954                         imap_handle_error(SESSION(session), NULL, r);
2955                         log_warning(LOG_PROTOCOL, _("can't create mailbox: LIST failed\n"));
2956                         g_free(imap_path);
2957                         g_free(dirpath);
2958                         ptr_array_free_strings(argbuf);
2959                         g_ptr_array_free(argbuf, TRUE);
2960                         return NULL;
2961                 }
2962
2963                 if (clist_count(lep_list) > 0)
2964                         exist = TRUE;
2965                 mailimap_list_result_free(lep_list);
2966                 lep_list = NULL;
2967                 if (!exist) {
2968                         ok = imap_cmd_create(session, imap_path);
2969                         if (ok != MAILIMAP_NO_ERROR) {
2970                                 log_warning(LOG_PROTOCOL, _("can't create mailbox\n"));
2971                                 g_free(imap_path);
2972                                 g_free(dirpath);
2973                                 return NULL;
2974                         }
2975                         r = imap_threaded_list(folder, "", imap_path, &lep_list);
2976                         if (r == MAILIMAP_NO_ERROR) {
2977                                 GSList *item_list = imap_list_from_lep(IMAP_FOLDER(folder),
2978                                                lep_list, dirpath, TRUE);
2979                                 if (item_list) {
2980                                         FolderItem *cur_item = FOLDER_ITEM(item_list->data);
2981                                         no_select = cur_item->no_select;
2982                                         no_sub = cur_item->no_sub;
2983                                         g_slist_free(item_list);
2984                                 }
2985                                 mailimap_list_result_free(lep_list);
2986                         } else {
2987                                 imap_handle_error(SESSION(session), NULL, r);
2988                         }
2989                 }
2990                 imap_threaded_subscribe(folder, imap_path, TRUE);
2991         } else {
2992                 clist *lep_list;
2993                 int r;
2994                 /* just get flags */
2995                 r = imap_threaded_list(folder, "", "INBOX", &lep_list);
2996                 if (r == MAILIMAP_NO_ERROR) {
2997                         GSList *item_list = imap_list_from_lep(IMAP_FOLDER(folder),
2998                                        lep_list, dirpath, TRUE);
2999                         if (item_list) {
3000                                 FolderItem *cur_item = FOLDER_ITEM(item_list->data);
3001                                 no_select = cur_item->no_select;
3002                                 no_sub = cur_item->no_sub;
3003                                 g_slist_free(item_list);
3004                         }
3005                         mailimap_list_result_free(lep_list);
3006                 } else {
3007                         imap_handle_error(SESSION(session), NULL, r);
3008                 }
3009         }
3010
3011         new_item = folder_item_new(folder, new_name, dirpath);
3012         new_item->no_select = no_select;
3013         new_item->no_sub = no_sub;
3014         folder_item_append(parent, new_item);
3015         g_free(imap_path);
3016         g_free(dirpath);
3017
3018         dirpath = folder_item_get_path(new_item);
3019         if (!is_dir_exist(dirpath))
3020                 make_dir_hier(dirpath);
3021         g_free(dirpath);
3022
3023         if (exist) {
3024                 /* folder existed, scan it */
3025                 imap_scan_required(folder, new_item);
3026                 folder_item_scan_full(new_item, FALSE);
3027         }
3028
3029         return new_item;
3030 }
3031
3032 static gint imap_rename_folder(Folder *folder, FolderItem *item,
3033                                const gchar *name)
3034 {
3035         gchar *dirpath;
3036         gchar *newpath;
3037         gchar *real_oldpath;
3038         gchar *real_newpath;
3039         gchar *paths[2];
3040         gchar *old_cache_dir;
3041         gchar *new_cache_dir;
3042         IMAPSession *session;
3043         gchar separator;
3044         gint ok = MAILIMAP_NO_ERROR;
3045         gint exists, recent, unseen;
3046         guint32 uid_validity;
3047
3048         g_return_val_if_fail(folder != NULL, -1);
3049         g_return_val_if_fail(item != NULL, -1);
3050         g_return_val_if_fail(item->path != NULL, -1);
3051         g_return_val_if_fail(name != NULL, -1);
3052
3053         debug_print("getting session...\n");
3054         session = imap_session_get(folder);
3055         if (!session) {
3056                 return -1;
3057         }
3058
3059         if (strchr(name, imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &ok)) != NULL ||
3060                 is_fatal(ok)) {
3061                 g_warning(_("New folder name must not contain the namespace "
3062                             "path separator"));
3063                 return -1;
3064         }
3065
3066         real_oldpath = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &ok);
3067         if (is_fatal(ok)) {
3068                 return -1;
3069         }
3070
3071         g_free(session->mbox);
3072         session->mbox = NULL;
3073         session->exists = 0;
3074         session->recent = 0;
3075         session->expunge = 0;
3076         ok = imap_cmd_examine(session, "INBOX",
3077                               &exists, &recent, &unseen, &uid_validity, FALSE);
3078         if (ok != MAILIMAP_NO_ERROR) {
3079                 g_free(real_oldpath);
3080                 return -1;
3081         }
3082
3083         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &ok);
3084         if (is_fatal(ok))
3085                 return -1;
3086         if (strchr(item->path, G_DIR_SEPARATOR)) {
3087                 dirpath = g_path_get_dirname(item->path);
3088                 newpath = g_strconcat(dirpath, G_DIR_SEPARATOR_S, name, NULL);
3089                 g_free(dirpath);
3090         } else
3091                 newpath = g_strdup(name);
3092
3093         real_newpath = imap_utf8_to_modified_utf7(newpath, FALSE);
3094         imap_path_separator_subst(real_newpath, separator);
3095
3096         ok = imap_cmd_rename(session, real_oldpath, real_newpath);
3097         if (ok != MAILIMAP_NO_ERROR) {
3098                 log_warning(LOG_PROTOCOL, _("can't rename mailbox: %s to %s\n"),
3099                             real_oldpath, real_newpath);
3100                 g_free(real_oldpath);
3101                 g_free(newpath);
3102                 g_free(real_newpath);
3103                 return -1;
3104         }
3105         g_free(item->name);
3106         item->name = g_strdup(name);
3107
3108         old_cache_dir = folder_item_get_path(item);
3109
3110         paths[0] = g_strdup(item->path);
3111         paths[1] = newpath;
3112         g_node_traverse(item->node, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
3113                         imap_rename_folder_func, paths);
3114
3115         if (is_dir_exist(old_cache_dir)) {
3116                 new_cache_dir = folder_item_get_path(item);
3117                 if (g_rename(old_cache_dir, new_cache_dir) < 0) {
3118                         FILE_OP_ERROR(old_cache_dir, "rename");
3119                 }
3120                 g_free(new_cache_dir);
3121         }
3122
3123         g_free(old_cache_dir);
3124         g_free(paths[0]);
3125         g_free(newpath);
3126         g_free(real_oldpath);
3127         g_free(real_newpath);
3128         return 0;
3129 }
3130
3131 gint imap_subscribe(Folder *folder, FolderItem *item, gchar *rpath, gboolean sub)
3132 {
3133         gchar *path;
3134         gint r = MAILIMAP_NO_ERROR;
3135         IMAPSession *session;
3136         debug_print("getting session...\n");
3137
3138         session = imap_session_get(folder);
3139         if (!session) {
3140                 return -1;
3141         }
3142         if (item && item->path) {
3143                 path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &r);
3144                 if (!path)
3145                         return -1;
3146                 if (is_fatal(r)) {
3147                         g_free(path);
3148                         return -1;
3149                 }
3150                 if (!strcmp(path, "INBOX") && sub == FALSE) {
3151                         g_free(path);
3152                         return -1;
3153                 }
3154                 debug_print("%ssubscribing %s\n", sub?"":"un", path);
3155                 r = imap_threaded_subscribe(folder, path, sub);
3156                 g_free(path);
3157         } else if (rpath) {
3158                 r = imap_threaded_subscribe(folder, rpath, sub);
3159         } else
3160                 return -1;
3161         return r;
3162 }
3163
3164 static gint imap_remove_folder_real(Folder *folder, FolderItem *item)
3165 {
3166         gint ok = MAILIMAP_NO_ERROR;
3167         IMAPSession *session;
3168         gchar *path;
3169         gchar *cache_dir;
3170         gboolean selected_folder;
3171
3172         g_return_val_if_fail(folder != NULL, -1);
3173         g_return_val_if_fail(item != NULL, -1);
3174         g_return_val_if_fail(item->path != NULL, -1);
3175
3176         debug_print("getting session...\n");
3177         session = imap_session_get(folder);
3178         if (!session) {
3179                 return -1;
3180         }
3181         path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &ok);
3182         if (is_fatal(ok))
3183                 return -1;
3184
3185         imap_threaded_subscribe(folder, path, FALSE);
3186
3187         selected_folder = (session->mbox != NULL) &&
3188                           (!strcmp(session->mbox, item->path));
3189         if (selected_folder) {
3190                 ok = imap_cmd_close(session);
3191                 if (ok != MAILIMAP_NO_ERROR) {
3192                         debug_print("close err %d\n", ok);
3193                         return ok;
3194                 }
3195         }
3196         ok = imap_cmd_delete(session, path);
3197         if (ok != MAILIMAP_NO_ERROR && !is_fatal(ok)) {
3198                 gchar *tmp = NULL;
3199
3200                 ok = MAILIMAP_NO_ERROR;
3201                 tmp = g_strdup_printf("%s%c", path,
3202                                 imap_get_path_separator(session, IMAP_FOLDER(folder), path, &ok));
3203                 g_free(path);
3204                 path = tmp;
3205                 if (!is_fatal(ok))
3206                         ok = imap_cmd_delete(session, path);
3207         }
3208
3209         if (ok != MAILIMAP_NO_ERROR) {
3210                 log_warning(LOG_PROTOCOL, _("can't delete mailbox\n"));
3211                 g_free(path);
3212                 return -1;
3213         }
3214
3215         g_free(path);
3216         cache_dir = folder_item_get_path(item);
3217         if (is_dir_exist(cache_dir) && remove_dir_recursive(cache_dir) < 0)
3218                 g_warning("can't remove directory '%s'\n", cache_dir);
3219         g_free(cache_dir);
3220         folder_item_remove(item);
3221         return 0;
3222 }
3223
3224 static gint imap_remove_folder(Folder *folder, FolderItem *item)
3225 {
3226         GNode *node, *next;
3227
3228         g_return_val_if_fail(item != NULL, -1);
3229         g_return_val_if_fail(item->folder != NULL, -1);
3230         g_return_val_if_fail(item->node != NULL, -1);
3231
3232         node = item->node->children;
3233         while (node != NULL) {
3234                 next = node->next;
3235                 if (imap_remove_folder(folder, FOLDER_ITEM(node->data)) < 0)
3236                         return -1;
3237                 node = next;
3238         }
3239         debug_print("IMAP removing %s\n", item->path);
3240
3241         if (imap_remove_all_msg(folder, item) < 0)
3242                 return -1;
3243         return imap_remove_folder_real(folder, item);
3244 }
3245
3246 typedef struct _uncached_data {
3247         IMAPSession *session;
3248         FolderItem *item;
3249         MsgNumberList *numlist;
3250         guint cur;
3251         guint total;
3252         gboolean done;
3253         int ok;
3254 } uncached_data;
3255
3256 static void *imap_get_uncached_messages_thread(void *data)
3257 {
3258         uncached_data *stuff = (uncached_data *)data;
3259         IMAPSession *session = stuff->session;
3260         FolderItem *item = stuff->item;
3261         MsgNumberList *numlist = stuff->numlist;
3262         GSList *newlist = NULL;
3263         GSList *llast = NULL;
3264         GSList *seq_list, *cur;
3265         gboolean got_alien_tags = FALSE;
3266
3267         debug_print("uncached_messages\n");
3268
3269         if (session == NULL || item == NULL || item->folder == NULL
3270             || FOLDER_CLASS(item->folder) != &imap_class) {
3271                 stuff->done = TRUE;
3272                 return NULL;
3273         }
3274
3275         seq_list = imap_get_lep_set_from_numlist(IMAP_FOLDER(item->folder), numlist);
3276         debug_print("get msgs info\n");
3277         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
3278                 struct mailimap_set * imapset;
3279                 unsigned int i;
3280                 int r;
3281                 carray * env_list;
3282                 int count;
3283
3284                 if (session->cancelled)
3285                         break;
3286
3287                 imapset = cur->data;
3288
3289                 r = imap_threaded_fetch_env(session->folder,
3290                                             imapset, &env_list);
3291                 if (r != MAILIMAP_NO_ERROR) {
3292                         imap_handle_error(SESSION(session), NULL, r);
3293                         if (is_fatal(r)) {
3294                                 stuff->ok = r;
3295                                 return NULL;
3296                         }
3297                         continue;
3298                 }
3299
3300                 session_set_access_time(SESSION(session));
3301
3302                 count = 0;
3303                 for(i = 0 ; i < carray_count(env_list) ; i += 2) {
3304                         struct imap_fetch_env_info * info;
3305                         MsgInfo * msginfo;
3306                         GSList *tags = NULL, *cur = NULL;
3307                         info = carray_get(env_list, i);
3308                         tags = carray_get(env_list, i+1);
3309                         msginfo = imap_envelope_from_lep(info, item);
3310                         if (msginfo == NULL) {
3311                                 slist_free_strings(tags);
3312                                 g_slist_free(tags);
3313                                 continue;
3314                         }
3315                         g_slist_free(msginfo->tags);
3316                         msginfo->tags = NULL;
3317
3318                         for (cur = tags; cur; cur = cur->next) {
3319                                 gchar *real_tag = imap_modified_utf7_to_utf8(cur->data, TRUE);
3320                                 gint id = 0;
3321                                 id = tags_get_id_for_str(real_tag);
3322                                 if (id == -1) {
3323                                         id = tags_add_tag(real_tag);
3324                                         got_alien_tags = TRUE;
3325                                 }
3326                                 if (!g_slist_find(msginfo->tags, GINT_TO_POINTER(id))) {
3327                                         msginfo->tags = g_slist_prepend(
3328                                                         msginfo->tags,
3329                                                         GINT_TO_POINTER(id));
3330                                 }
3331                                 g_free(real_tag);
3332                         }
3333                         if (msginfo->tags)
3334                                 msginfo->tags = g_slist_reverse(msginfo->tags);
3335                         slist_free_strings(tags);
3336                         g_slist_free(tags);
3337                         msginfo->folder = item;
3338                         if (!newlist)
3339                                 llast = newlist = g_slist_append(newlist, msginfo);
3340                         else {
3341                                 llast = g_slist_append(llast, msginfo);
3342                                 llast = llast->next;
3343                         }
3344                         count ++;
3345                 }
3346
3347                 imap_fetch_env_free(env_list);
3348         }
3349
3350         if (got_alien_tags) {
3351                 tags_write_tags();
3352                 main_window_reflect_tags_changes(mainwindow_get_mainwindow());
3353         }
3354
3355         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
3356                 struct mailimap_set * imapset;
3357
3358                 imapset = cur->data;
3359                 mailimap_set_free(imapset);
3360         }
3361
3362         session_set_access_time(SESSION(session));
3363         stuff->done = TRUE;
3364         return newlist;
3365 }
3366
3367 #define MAX_MSG_NUM 50
3368
3369 static GSList *imap_get_uncached_messages(IMAPSession *session,
3370                                         FolderItem *item,
3371                                         MsgNumberList *numlist,
3372                                         int *r)
3373 {
3374         GSList *result = NULL;
3375         GSList * cur;
3376         uncached_data *data = g_new0(uncached_data, 1);
3377
3378         cur = numlist;
3379         data->total = g_slist_length(numlist);
3380         data->ok = MAILIMAP_NO_ERROR;
3381         debug_print("messages list : %i\n", data->total);
3382
3383         while (cur != NULL) {
3384                 GSList * partial_result;
3385                 int count;
3386                 GSList * newlist;
3387                 GSList * llast;
3388
3389                 llast = NULL;
3390                 count = 0;
3391                 newlist = NULL;
3392                 while (count < MAX_MSG_NUM) {
3393                         void * p;
3394
3395                         p = cur->data;
3396
3397                         if (newlist == NULL)
3398                                 llast = newlist = g_slist_append(newlist, p);
3399                         else {
3400                                 llast = g_slist_append(llast, p);
3401                                 llast = llast->next;
3402                         }
3403                         count ++;
3404
3405                         cur = cur->next;
3406                         if (cur == NULL)
3407                                 break;
3408                 }
3409
3410                 data->done = FALSE;
3411                 data->session = session;
3412                 data->item = item;
3413                 data->numlist = newlist;
3414                 data->cur += count;
3415
3416                 if (prefs_common.work_offline &&
3417                     !inc_offline_should_override(FALSE,
3418                         _("Claws Mail needs network access in order "
3419                           "to access the IMAP server."))) {
3420                         g_free(data);
3421                         return NULL;
3422                 }
3423
3424                 partial_result =
3425                         (GSList *)imap_get_uncached_messages_thread(data);
3426                 *r = data->ok;
3427                 if (data->ok != MAILIMAP_NO_ERROR) {
3428                         goto bail;
3429                 }
3430                 statusbar_progress_all(data->cur,data->total, 1);
3431
3432                 g_slist_free(newlist);
3433
3434                 result = g_slist_concat(result, partial_result);
3435         }
3436 bail:
3437         g_free(data);
3438
3439         statusbar_progress_all(0,0,0);
3440         statusbar_pop_all();
3441
3442         return result;
3443 }
3444
3445 static void imap_delete_all_cached_messages(FolderItem *item)
3446 {
3447         gchar *dir;
3448
3449         g_return_if_fail(item != NULL);
3450         g_return_if_fail(item->folder != NULL);
3451         g_return_if_fail(FOLDER_CLASS(item->folder) == &imap_class);
3452
3453         debug_print("Deleting all cached messages...\n");
3454
3455         dir = folder_item_get_path(item);
3456         if (is_dir_exist(dir))
3457                 remove_all_numbered_files(dir);
3458         g_free(dir);
3459
3460         debug_print("done.\n");
3461 }
3462
3463 gchar imap_get_path_separator_for_item(FolderItem *item)
3464 {
3465         Folder *folder = NULL;
3466         IMAPFolder *imap_folder = NULL;
3467         IMAPSession *session = NULL;
3468         gchar result = '/';
3469         gint ok = MAILIMAP_NO_ERROR;
3470         if (!item)
3471                 return '/';
3472         folder = item->folder;
3473
3474         if (!folder)
3475                 return '/';
3476
3477         imap_folder = IMAP_FOLDER(folder);
3478
3479         if (!imap_folder)
3480                 return '/';
3481
3482         debug_print("getting session...");
3483         session = imap_session_get(FOLDER(folder));
3484         result = imap_get_path_separator(session, imap_folder, item->path, &ok);
3485         return result;
3486 }
3487
3488 static gchar imap_refresh_path_separator(IMAPSession *session, IMAPFolder *folder, const gchar *subfolder, gint *ok)
3489 {
3490         clist * lep_list;
3491         int r;
3492         gchar separator = '\0';
3493
3494         g_return_val_if_fail(session != NULL, '/');
3495         r = imap_threaded_list((Folder *)folder, "", subfolder, &lep_list);
3496
3497         if (r != MAILIMAP_NO_ERROR) {
3498                 imap_handle_error(SESSION(session), NULL, r);
3499                 log_warning(LOG_PROTOCOL, _("LIST failed\n"));
3500                 *ok = r;
3501                 return '\0';
3502         }
3503
3504         if (lep_list != NULL && clist_count(lep_list) > 0) {
3505                 clistiter * iter = clist_begin(lep_list);
3506                 struct mailimap_mailbox_list * mb;
3507                 mb = clist_content(iter);
3508
3509                 separator = mb->mb_delimiter;
3510                 debug_print("got separator: %c\n", folder->last_seen_separator);
3511         }
3512         *ok = MAILIMAP_NO_ERROR;
3513         mailimap_list_result_free(lep_list);
3514         return separator;
3515 }
3516
3517 static gchar imap_get_path_separator(IMAPSession *session, IMAPFolder *folder, const gchar *path, gint *ok)
3518 {
3519         gchar separator = '/';
3520         *ok = MAILIMAP_NO_ERROR;
3521         if (folder->last_seen_separator == 0) {
3522                 folder->last_seen_separator = imap_refresh_path_separator(session, folder, "", ok);
3523         }
3524
3525         if (folder->last_seen_separator == 0) {
3526                 folder->last_seen_separator = imap_refresh_path_separator(session, folder, "INBOX", ok);
3527         }
3528
3529         if (folder->last_seen_separator != 0) {
3530                 debug_print("using separator: %c\n", folder->last_seen_separator);
3531                 return folder->last_seen_separator;
3532         }
3533
3534         return separator;
3535 }
3536
3537 static gchar *imap_get_real_path(IMAPSession *session, IMAPFolder *folder, const gchar *path, gint *ok)
3538 {
3539         gchar *real_path = NULL;
3540         gchar separator;
3541
3542         g_return_val_if_fail(folder != NULL, NULL);
3543         g_return_val_if_fail(path != NULL, NULL);
3544
3545         *ok = MAILIMAP_NO_ERROR;
3546
3547         real_path = imap_utf8_to_modified_utf7(path, FALSE);
3548         separator = imap_get_path_separator(session, folder, path, ok);
3549         if (*ok == MAILIMAP_NO_ERROR)
3550                 imap_path_separator_subst(real_path, separator);
3551
3552         return real_path;
3553 }
3554
3555 static gint imap_set_message_flags(IMAPSession *session,
3556                                    IMAPFolderItem *item,
3557                                    MsgNumberList *numlist,
3558                                    IMAPFlags flags,
3559                                    GSList *tags,
3560                                    gboolean is_set)
3561 {
3562         gint ok = 0;
3563         GSList *seq_list;
3564         GSList * cur;
3565         gint total = 0;
3566         IMAPFolder *folder = NULL;
3567         GSList *sorted_list = NULL;
3568
3569         if (numlist == NULL || session == NULL)
3570                 return MAILIMAP_ERROR_BAD_STATE;
3571
3572         folder = IMAP_FOLDER(session->folder);
3573
3574         sorted_list = g_slist_copy(numlist);
3575         sorted_list = g_slist_sort(sorted_list, g_int_compare);
3576
3577         cur = g_slist_last(sorted_list);
3578
3579         if (cur)
3580                 total = GPOINTER_TO_INT(cur->data);
3581
3582         seq_list = imap_get_lep_set_from_numlist(IMAP_FOLDER(session->folder), sorted_list);
3583
3584         statusbar_print_all(_("Flagging messages..."));
3585
3586         for(cur = seq_list ; cur != NULL ; cur = g_slist_next(cur)) {
3587                 struct mailimap_set * imapset = (struct mailimap_set *)cur->data;
3588                 struct mailimap_set_item *set_item = NULL;
3589
3590                 if (imapset->set_list)
3591                         set_item = clist_content(clist_begin(imapset->set_list));
3592                 else
3593                         continue;
3594
3595                 if (set_item == NULL)
3596                         continue;
3597
3598                 statusbar_progress_all(set_item->set_first, total, 1);
3599
3600                 ok = imap_cmd_store(session, item, imapset,
3601                                     flags, tags, is_set);
3602                 statusbar_progress_all(set_item->set_last, total, 1);
3603                 if (ok != MAILIMAP_NO_ERROR && folder->max_set_size > 20) {
3604                         /* reduce max set size */
3605                         folder->max_set_size /= 2;
3606                 }
3607                 if (ok != MAILIMAP_NO_ERROR && is_fatal(ok)) {
3608                         break;
3609                 }
3610         }
3611
3612         g_slist_free(sorted_list);
3613
3614         statusbar_progress_all(0,0,0);
3615         statusbar_pop_all();
3616
3617         imap_lep_set_free(seq_list);
3618
3619         return ok;
3620 }
3621
3622 typedef struct _select_data {
3623         IMAPSession *session;
3624         gchar *real_path;
3625         gint *exists;
3626         gint *recent;
3627         gint *unseen;
3628         guint32 *uid_validity;
3629         gboolean done;
3630 } select_data;
3631
3632 static gint imap_select(IMAPSession *session, IMAPFolder *folder,
3633                         FolderItem *item,
3634                         gint *exists, gint *recent, gint *unseen,
3635                         guint32 *uid_validity, gint *can_create_flags,
3636                         gboolean block)
3637 {
3638         gchar *real_path;
3639         gint ok = MAILIMAP_NO_ERROR;
3640         gint exists_, recent_, unseen_;
3641         guint32 uid_validity_;
3642         gint can_create_flags_;
3643         const gchar *path = item ? item->path:NULL;
3644
3645         if (!item) {
3646                 return MAILIMAP_ERROR_BAD_STATE;
3647         }
3648
3649         if (!exists && !recent && !unseen && !uid_validity && !can_create_flags) {
3650                 if (session->mbox && strcmp(session->mbox, path) == 0)
3651                         return MAILIMAP_NO_ERROR;
3652         }
3653         if (!exists && !recent && !unseen && !uid_validity && can_create_flags) {
3654                 if (session->mbox && strcmp(session->mbox, path) == 0) {
3655                         if (IMAP_FOLDER_ITEM(item)->can_create_flags != ITEM_CAN_CREATE_FLAGS_UNKNOWN)
3656                                 return MAILIMAP_NO_ERROR;
3657                 }
3658         }
3659         if (!exists)
3660                 exists = &exists_;
3661         if (!recent)
3662                 recent = &recent_;
3663         if (!unseen)
3664                 unseen = &unseen_;
3665         if (!uid_validity)
3666                 uid_validity = &uid_validity_;
3667         if (!can_create_flags)
3668                 can_create_flags = &can_create_flags_;
3669
3670         g_free(session->mbox);
3671         session->mbox = NULL;
3672         session->exists = 0;
3673         session->recent = 0;
3674         session->expunge = 0;
3675
3676         real_path = imap_get_real_path(session, folder, path, &ok);
3677         if (is_fatal(ok))
3678                 return ok;
3679         g_slist_free(IMAP_FOLDER_ITEM(item)->ok_flags);
3680         IMAP_FOLDER_ITEM(item)->ok_flags = NULL;
3681         ok = imap_cmd_select(session, real_path,
3682                              exists, recent, unseen, uid_validity, can_create_flags,
3683                              &(IMAP_FOLDER_ITEM(item)->ok_flags), block);
3684         if (ok != MAILIMAP_NO_ERROR) {
3685                 log_warning(LOG_PROTOCOL, _("can't select folder: %s\n"), real_path);
3686         } else {
3687                 session->mbox = g_strdup(path);
3688                 session->folder_content_changed = FALSE;
3689                 session->exists = *exists;
3690                 session->recent = *recent;
3691                 session->expunge = 0;
3692                 session->unseen = *unseen;
3693                 session->uid_validity = *uid_validity;
3694                 debug_print("select: exists %d recent %d expunge %d uid_validity %d can_create_flags %d\n",
3695                         session->exists, session->recent, session->expunge,
3696                         session->uid_validity, *can_create_flags);
3697         }
3698         if (*can_create_flags) {
3699                 IMAP_FOLDER_ITEM(item)->can_create_flags = ITEM_CAN_CREATE_FLAGS;
3700         } else {
3701                 IMAP_FOLDER_ITEM(item)->can_create_flags = ITEM_CANNOT_CREATE_FLAGS;
3702         }
3703         g_free(real_path);
3704
3705         return ok;
3706 }
3707
3708 static gint imap_status(IMAPSession *session, IMAPFolder *folder,
3709                         const gchar *path, IMAPFolderItem *item,
3710                         gint *messages,
3711                         guint32 *uid_next, guint32 *uid_validity,
3712                         gint *unseen, gboolean block)
3713 {
3714         int r = MAILIMAP_NO_ERROR;
3715         clistiter * iter;
3716         struct mailimap_mailbox_data_status * data_status;
3717         int got_values;
3718         gchar *real_path;
3719         guint mask = 0;
3720
3721         real_path = imap_get_real_path(session, folder, path, &r);
3722         if (is_fatal(r)) {
3723                 g_free(real_path);
3724                 return r;
3725         }
3726         if (messages) {
3727                 mask |= 1 << 0;
3728                 *messages = 0;
3729         }
3730         if (uid_next) {
3731                 mask |= 1 << 2;
3732                 *uid_next = 0;
3733         }
3734         if (uid_validity) {
3735                 mask |= 1 << 3;
3736                 *uid_validity = 0;
3737         }
3738         if (unseen) {
3739                 mask |= 1 << 4;
3740                 *unseen = 0;
3741         }
3742
3743         if (session->mbox != NULL &&
3744             !strcmp(session->mbox, item->item.path)) {
3745                 r = imap_cmd_close(session);
3746                 if (r != MAILIMAP_NO_ERROR) {
3747                         debug_print("close err %d\n", r);
3748                         g_free(real_path);
3749                         return r;
3750                 }
3751         }
3752
3753         r = imap_threaded_status(FOLDER(folder), real_path,
3754                 &data_status, mask);
3755
3756         g_free(real_path);
3757         if (r != MAILIMAP_NO_ERROR) {
3758                 imap_handle_error(SESSION(session), NULL, r);
3759                 debug_print("status err %d\n", r);
3760                 return r;
3761         }
3762
3763         if (data_status == NULL || data_status->st_info_list == NULL) {
3764                 debug_print("data_status %p\n", data_status);
3765                 if (data_status) {
3766                         debug_print("data_status->st_info_list %p\n", data_status->st_info_list);
3767                         mailimap_mailbox_data_status_free(data_status);
3768                 }
3769                 return MAILIMAP_ERROR_BAD_STATE;
3770         }
3771
3772         got_values = 0;
3773         if (data_status->st_info_list) {
3774                 for(iter = clist_begin(data_status->st_info_list) ; iter != NULL ;
3775                     iter = clist_next(iter)) {
3776                         struct mailimap_status_info * info;
3777
3778                         info = clist_content(iter);
3779                         switch (info->st_att) {
3780                         case MAILIMAP_STATUS_ATT_MESSAGES:
3781                                 if (messages) {
3782                                         * messages = info->st_value;
3783                                         got_values |= 1 << 0;
3784                                 }
3785                                 break;
3786
3787                         case MAILIMAP_STATUS_ATT_UIDNEXT:
3788                                 if (uid_next) {
3789                                         * uid_next = info->st_value;
3790                                         got_values |= 1 << 2;
3791                                 }
3792                                 break;
3793
3794                         case MAILIMAP_STATUS_ATT_UIDVALIDITY:
3795                                 if (uid_validity) {
3796                                         * uid_validity = info->st_value;
3797                                         got_values |= 1 << 3;
3798                                 }
3799                                 break;
3800
3801                         case MAILIMAP_STATUS_ATT_UNSEEN:
3802                                 if (unseen) {
3803                                         * unseen = info->st_value;
3804                                         got_values |= 1 << 4;
3805                                 }
3806                                 break;
3807                         }
3808                 }
3809         }
3810         mailimap_mailbox_data_status_free(data_status);
3811
3812         if (got_values != mask) {
3813                 g_warning("status: incomplete values received (%d)\n", got_values);
3814         }
3815         return MAILIMAP_NO_ERROR;
3816 }
3817
3818 static void imap_free_capabilities(IMAPSession *session)
3819 {
3820         slist_free_strings(session->capability);
3821         g_slist_free(session->capability);
3822         session->capability = NULL;
3823 }
3824
3825 /* low-level IMAP4rev1 commands */
3826
3827 static gint imap_cmd_login(IMAPSession *session,
3828                            const gchar *user, const gchar *pass,
3829                            const gchar *type)
3830 {
3831         int r;
3832         gint ok;
3833
3834         if (!strcmp(type, "LOGIN") && imap_has_capability(session, "LOGINDISABLED")) {
3835                 gint ok = MAILIMAP_ERROR_BAD_STATE;
3836                 if (imap_has_capability(session, "STARTTLS")) {
3837 #ifdef USE_GNUTLS
3838                         log_warning(LOG_PROTOCOL, _("Server requires TLS to log in.\n"));
3839                         ok = imap_cmd_starttls(session);
3840                         if (ok != MAILIMAP_NO_ERROR) {
3841                                 log_warning(LOG_PROTOCOL, _("Can't start TLS session.\n"));
3842                                 return ok;
3843                         } else {
3844                                 /* refresh capas */
3845                                 imap_free_capabilities(session);
3846                                 if ((r = imap_get_capabilities(session)) != MAILIMAP_NO_ERROR) {
3847                                         imap_handle_error(SESSION(session), NULL, r);
3848                                         log_warning(LOG_PROTOCOL, _("Can't refresh capabilities.\n"));
3849                                         return r;
3850                                 }
3851                         }
3852 #else
3853                         log_error(LOG_PROTOCOL, _("Connection to %s failed: "
3854                                         "server requires TLS, but Claws Mail "
3855                                         "has been compiled without OpenSSL "
3856                                         "support.\n"),
3857                                         SESSION(session)->server);
3858                         return MAILIMAP_ERROR_LOGIN;
3859 #endif
3860                 } else {
3861                         log_error(LOG_PROTOCOL, _("Server logins are disabled.\n"));
3862                         return MAILIMAP_ERROR_LOGIN;
3863                 }
3864         }
3865
3866         log_print(LOG_PROTOCOL, "IMAP4> Logging %s to %s using %s\n",
3867                         user,
3868                         SESSION(session)->server,
3869                         type);
3870         r = imap_threaded_login(session->folder, user, pass, type);
3871         if (r != MAILIMAP_NO_ERROR) {
3872                 imap_handle_error(SESSION(session), NULL, r);
3873                 log_print(LOG_PROTOCOL, "IMAP4< Error logging in to %s\n",
3874                                 SESSION(session)->server);
3875                 ok = r;
3876         } else {
3877                 log_print(LOG_PROTOCOL, "IMAP4< Login to %s successful\n",
3878                                 SESSION(session)->server);
3879                 ok = MAILIMAP_NO_ERROR;
3880         }
3881         return ok;
3882 }
3883
3884 static gint imap_cmd_noop(IMAPSession *session)
3885 {
3886         int r;
3887         unsigned int exists, recent, expunge, unseen, uidnext, uidval;
3888
3889         r = imap_threaded_noop(session->folder, &exists, &recent, &expunge, &unseen, &uidnext, &uidval);
3890         if (r != MAILIMAP_NO_ERROR) {
3891                 imap_handle_error(SESSION(session), NULL, r);
3892                 debug_print("noop err %d\n", r);
3893                 return r;
3894         }
3895
3896         session->folder_content_changed = FALSE;
3897
3898         if ((exists && exists != session->exists)
3899          || (recent && recent != session->recent)
3900          || (expunge && expunge != session->expunge)
3901          || (unseen && unseen != session->unseen)) {
3902                 session->folder_content_changed = TRUE;
3903         }
3904         if (uidnext != 0 && uidnext != session->uid_next) {
3905                 session->uid_next = uidnext;
3906                 session->folder_content_changed = TRUE;
3907         }
3908         if (uidval != 0 && uidval != session->uid_validity) {
3909                 session->uid_validity = uidval;
3910                 session->folder_content_changed = TRUE;
3911         }
3912
3913         session->exists = exists;
3914         session->recent = recent;
3915         session->expunge = expunge;
3916         session->unseen = unseen;
3917
3918         session_set_access_time(SESSION(session));
3919
3920         return MAILIMAP_NO_ERROR;
3921 }
3922
3923 #ifdef USE_GNUTLS
3924 static gint imap_cmd_starttls(IMAPSession *session)
3925 {
3926         int r;
3927
3928         r = imap_threaded_starttls(session->folder,
3929                 SESSION(session)->server, SESSION(session)->port);
3930         if (r != MAILIMAP_NO_ERROR) {
3931                 imap_handle_error(SESSION(session), NULL, r);
3932                 debug_print("starttls err %d\n", r);
3933                 return r;
3934         }
3935         return MAILIMAP_NO_ERROR;
3936 }
3937 #endif
3938
3939 static gint imap_cmd_select(IMAPSession *session, const gchar *folder,
3940                             gint *exists, gint *recent, gint *unseen,
3941                             guint32 *uid_validity, gint *can_create_flags,
3942                             GSList **ok_flags, gboolean block)
3943 {
3944         int r;
3945
3946         r = imap_threaded_select(session->folder, folder,
3947                                  exists, recent, unseen, uid_validity, can_create_flags, ok_flags);
3948         if (r != MAILIMAP_NO_ERROR) {
3949                 imap_handle_error(SESSION(session), NULL, r);
3950                 debug_print("select err %d\n", r);
3951                 return r;
3952         }
3953         return MAILIMAP_NO_ERROR;
3954 }
3955
3956 static gint imap_cmd_close(IMAPSession *session)
3957 {
3958         int r;
3959
3960         r = imap_threaded_close(session->folder);
3961         if (r != MAILIMAP_NO_ERROR) {
3962                 imap_handle_error(SESSION(session), NULL, r);
3963                 debug_print("close err %d\n", r);
3964                 return r;
3965         }
3966         g_free(session->mbox);
3967         session->mbox = NULL;
3968         session->exists = 0;
3969         session->recent = 0;
3970         session->expunge = 0;
3971         return MAILIMAP_NO_ERROR;
3972 }
3973
3974 static gint imap_cmd_examine(IMAPSession *session, const gchar *folder,
3975                              gint *exists, gint *recent, gint *unseen,
3976                              guint32 *uid_validity, gboolean block)
3977 {
3978         int r;
3979
3980         r = imap_threaded_examine(session->folder, folder,
3981                                   exists, recent, unseen, uid_validity);
3982         if (r != MAILIMAP_NO_ERROR) {
3983                 imap_handle_error(SESSION(session), NULL, r);
3984                 debug_print("examine err %d\n", r);
3985
3986                 return r;
3987         }
3988         return MAILIMAP_NO_ERROR;
3989 }
3990
3991 static gint imap_cmd_create(IMAPSession *session, const gchar *folder)
3992 {
3993         int r;
3994
3995         r = imap_threaded_create(session->folder, folder);
3996         if (r != MAILIMAP_NO_ERROR) {
3997                 imap_handle_error(SESSION(session), NULL, r);
3998                 return r;
3999         }
4000
4001         return MAILIMAP_NO_ERROR;
4002 }
4003
4004 static gint imap_cmd_rename(IMAPSession *session, const gchar *old_folder,
4005                             const gchar *new_folder)
4006 {
4007         int r;
4008
4009         r = imap_threaded_rename(session->folder, old_folder,
4010                                  new_folder);
4011         if (r != MAILIMAP_NO_ERROR) {
4012                 imap_handle_error(SESSION(session), NULL, r);
4013                 return r;
4014         }
4015
4016         return MAILIMAP_NO_ERROR;
4017 }
4018
4019 static gint imap_cmd_delete(IMAPSession *session, const gchar *folder)
4020 {
4021         int r;
4022
4023
4024         r = imap_threaded_delete(session->folder, folder);
4025         if (r != MAILIMAP_NO_ERROR) {
4026                 imap_handle_error(SESSION(session), NULL, r);
4027                 return r;
4028         }
4029
4030         return MAILIMAP_NO_ERROR;
4031 }
4032
4033 typedef struct _fetch_data {
4034         IMAPSession *session;
4035         guint32 uid;
4036         const gchar *filename;
4037         gboolean headers;
4038         gboolean body;
4039         gboolean done;
4040 } fetch_data;
4041
4042 static void *imap_cmd_fetch_thread(void *data)
4043 {
4044         fetch_data *stuff = (fetch_data *)data;
4045         IMAPSession *session = stuff->session;
4046         guint32 uid = stuff->uid;
4047         const gchar *filename = stuff->filename;
4048         int r;
4049
4050         if (stuff->body) {
4051                 r = imap_threaded_fetch_content(session->folder,
4052                                                uid, 1, filename);
4053         }
4054         else {
4055                 r = imap_threaded_fetch_content(session->folder,
4056                                                 uid, 0, filename);
4057         }
4058         if (r != MAILIMAP_NO_ERROR) {
4059                 imap_handle_error(SESSION(session), NULL, r);
4060                 debug_print("fetch err %d\n", r);
4061                 return GINT_TO_POINTER(r);
4062         }
4063         return GINT_TO_POINTER(MAILIMAP_NO_ERROR);
4064 }
4065
4066 static gint imap_cmd_fetch(IMAPSession *session, guint32 uid,
4067                                 const gchar *filename, gboolean headers,
4068                                 gboolean body)
4069 {
4070         fetch_data *data = g_new0(fetch_data, 1);
4071         int result = 0;
4072         data->done = FALSE;
4073         data->session = session;
4074         data->uid = uid;
4075         data->filename = filename;
4076         data->headers = headers;
4077         data->body = body;
4078
4079         if (prefs_common.work_offline &&
4080             !inc_offline_should_override(FALSE,
4081                 _("Claws Mail needs network access in order "
4082                   "to access the IMAP server."))) {
4083                 g_free(data);
4084                 return -1;
4085         }
4086         statusbar_print_all(_("Fetching message..."));
4087         result = GPOINTER_TO_INT(imap_cmd_fetch_thread(data));
4088         statusbar_pop_all();
4089         g_free(data);
4090         return result;
4091 }
4092
4093
4094 static gint imap_cmd_append(IMAPSession *session,
4095                             IMAPFolderItem *item,
4096                             const gchar *destfolder,
4097                             const gchar *file, IMAPFlags flags,
4098                             guint32 *new_uid)
4099 {
4100         struct mailimap_flag_list * flag_list;
4101         int r;
4102
4103         cm_return_val_if_fail(file != NULL, MAILIMAP_ERROR_BAD_STATE);
4104
4105         flag_list = imap_flag_to_lep(item, flags, NULL);
4106         lock_session(session);
4107         r = imap_threaded_append(session->folder, destfolder,
4108                          file, flag_list, (int *)new_uid);
4109         mailimap_flag_list_free(flag_list);
4110
4111         if (r != MAILIMAP_NO_ERROR) {
4112                 imap_handle_error(SESSION(session), NULL, r);
4113                 debug_print("append err %d\n", r);
4114                 return r;
4115         }
4116
4117         unlock_session(session);
4118
4119         return MAILIMAP_NO_ERROR;
4120 }
4121
4122 static gint imap_cmd_copy(IMAPSession *session, struct mailimap_set * set,
4123                           const gchar *destfolder,
4124                           struct mailimap_set **source, struct mailimap_set **dest)
4125 {
4126         int r;
4127
4128         g_return_val_if_fail(session != NULL, MAILIMAP_ERROR_BAD_STATE);
4129         g_return_val_if_fail(set != NULL, MAILIMAP_ERROR_BAD_STATE);
4130         g_return_val_if_fail(destfolder != NULL, MAILIMAP_ERROR_BAD_STATE);
4131
4132         r = imap_threaded_copy(session->folder, set, destfolder, source, dest);
4133         if (r != MAILIMAP_NO_ERROR) {
4134                 imap_handle_error(SESSION(session), NULL, r);
4135                 return r;
4136         }
4137
4138         return MAILIMAP_NO_ERROR;
4139 }
4140
4141 static gint imap_cmd_store(IMAPSession *session,
4142                            IMAPFolderItem *item,
4143                            struct mailimap_set * set,
4144                            IMAPFlags flags, GSList *tags, int do_add)
4145 {
4146         int r;
4147         struct mailimap_flag_list * flag_list = NULL;
4148         struct mailimap_store_att_flags * store_att_flags;
4149
4150         flag_list = imap_flag_to_lep(item, flags, tags);
4151
4152         if (do_add)
4153                 store_att_flags =
4154                         mailimap_store_att_flags_new_add_flags_silent(flag_list);
4155         else
4156                 store_att_flags =
4157                         mailimap_store_att_flags_new_remove_flags_silent(flag_list);
4158
4159         r = imap_threaded_store(session->folder, set, store_att_flags);
4160         mailimap_store_att_flags_free(store_att_flags);
4161         if (r != MAILIMAP_NO_ERROR) {
4162                 imap_handle_error(SESSION(session), NULL, r);
4163                 return r;
4164         }
4165
4166         return MAILIMAP_NO_ERROR;
4167 }
4168
4169 static gint imap_cmd_expunge(IMAPSession *session, gboolean do_expunge)
4170 {
4171         int r;
4172
4173         if (!do_expunge)
4174                 return MAILIMAP_NO_ERROR;
4175
4176         if (prefs_common.work_offline &&
4177             !inc_offline_should_override(FALSE,
4178                 _("Claws Mail needs network access in order "
4179                   "to access the IMAP server."))) {
4180                 return -1;
4181         }
4182
4183         r = imap_threaded_expunge(session->folder);
4184         if (r != MAILIMAP_NO_ERROR) {
4185                 imap_handle_error(SESSION(session), NULL, r);
4186                 return r;
4187         }
4188
4189         return MAILIMAP_NO_ERROR;
4190 }
4191
4192 gint imap_expunge(Folder *folder, FolderItem *item)
4193 {
4194         IMAPSession *session = imap_session_get(folder);
4195         if (session == NULL)
4196                 return -1;
4197
4198         return imap_cmd_expunge(session, TRUE);
4199 }
4200
4201 static void imap_path_separator_subst(gchar *str, gchar separator)
4202 {
4203         gchar *p;
4204         gboolean in_escape = FALSE;
4205
4206         if (!separator || separator == '/') return;
4207
4208         for (p = str; *p != '\0'; p++) {
4209                 if (*p == '/' && !in_escape)
4210                         *p = separator;
4211                 else if (*p == '&' && *(p + 1) != '-' && !in_escape)
4212                         in_escape = TRUE;
4213                 else if (*p == '-' && in_escape)
4214                         in_escape = FALSE;
4215         }
4216 }
4217
4218 static gboolean imap_rename_folder_func(GNode *node, gpointer data)
4219 {
4220         FolderItem *item = node->data;
4221         gchar **paths = data;
4222         const gchar *oldpath = paths[0];
4223         const gchar *newpath = paths[1];
4224         gchar *real_oldpath, *real_newpath;
4225         gchar *base;
4226         gchar *new_itempath;
4227         gint oldpathlen;
4228         IMAPSession *session = imap_session_get(item->folder);
4229         gint ok = MAILIMAP_NO_ERROR;
4230         oldpathlen = strlen(oldpath);
4231         if (strncmp(oldpath, item->path, oldpathlen) != 0) {
4232                 g_warning("path doesn't match: %s, %s\n", oldpath, item->path);
4233                 return TRUE;
4234         }
4235
4236         base = item->path + oldpathlen;
4237         while (*base == G_DIR_SEPARATOR) base++;
4238         if (*base == '\0')
4239                 new_itempath = g_strdup(newpath);
4240         else
4241                 new_itempath = g_strconcat(newpath, G_DIR_SEPARATOR_S, base,
4242                                            NULL);
4243
4244         real_oldpath = imap_get_real_path(session, IMAP_FOLDER(item->folder), item->path, &ok);
4245         g_free(item->path);
4246         item->path = new_itempath;
4247
4248         real_newpath = imap_get_real_path(session, IMAP_FOLDER(item->folder), item->path, &ok);
4249
4250         imap_threaded_subscribe(item->folder, real_oldpath, FALSE);
4251         imap_threaded_subscribe(item->folder, real_newpath, TRUE);
4252
4253         g_free(real_oldpath);
4254         g_free(real_newpath);
4255         return FALSE;
4256 }
4257
4258 static gint get_list_of_uids(IMAPSession *session, Folder *folder, IMAPFolderItem *item, GSList **msgnum_list)
4259 {
4260         GSList *uidlist, *elem;
4261         int r = -1;
4262         clist * lep_uidlist;
4263         gint ok, nummsgs = 0;
4264
4265         if (session == NULL) {
4266                 return -1;
4267         }
4268
4269         ok = imap_select(session, IMAP_FOLDER(folder), FOLDER_ITEM(item),
4270                          NULL, NULL, NULL, NULL, NULL, TRUE);
4271         if (ok != MAILIMAP_NO_ERROR) {
4272                 return -1;
4273         }
4274
4275         g_slist_free(item->uid_list);
4276         item->uid_list = NULL;
4277
4278         uidlist = NULL;
4279
4280         if (folder->account && folder->account->low_bandwidth) {
4281                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SIMPLE,
4282                                 NULL, NULL, &lep_uidlist);
4283         }
4284
4285         if (r == MAILIMAP_NO_ERROR) {
4286                 GSList * fetchuid_list =
4287                         imap_uid_list_from_lep(lep_uidlist, NULL);
4288                 mailimap_search_result_free(lep_uidlist);
4289
4290                 uidlist = g_slist_concat(fetchuid_list, uidlist);
4291         } else {
4292                 carray * lep_uidtab;
4293                 if (r != -1) { /* inited */
4294                         imap_handle_error(SESSION(session), NULL, r);
4295                         if (is_fatal(r))
4296                                 return -1;
4297                 }
4298                 r = imap_threaded_fetch_uid(folder, 1,
4299                                     &lep_uidtab);
4300                 if (r == MAILIMAP_NO_ERROR) {
4301                         GSList * fetchuid_list =
4302                                 imap_uid_list_from_lep_tab(lep_uidtab);
4303                         imap_fetch_uid_list_free(lep_uidtab);
4304                         uidlist = g_slist_concat(fetchuid_list, uidlist);
4305                 }
4306         }
4307
4308         if (r != MAILIMAP_NO_ERROR) {
4309                 imap_handle_error(SESSION(session), NULL, r);
4310                 return -1;
4311         }
4312
4313         for (elem = uidlist; elem != NULL; elem = g_slist_next(elem)) {
4314                 guint msgnum;
4315
4316                 msgnum = GPOINTER_TO_INT(elem->data);
4317
4318                 *msgnum_list = g_slist_prepend(*msgnum_list, GINT_TO_POINTER(msgnum));
4319                 item->uid_list = g_slist_prepend(item->uid_list, GINT_TO_POINTER(msgnum));
4320                 nummsgs++;
4321         }
4322         g_slist_free(uidlist);
4323
4324         unlock_session(session); /* locked from imap_get_num_list */
4325
4326         return nummsgs;
4327
4328 }
4329
4330 gint imap_get_num_list(Folder *folder, FolderItem *_item, GSList **msgnum_list, gboolean *old_uids_valid)
4331 {
4332         IMAPFolderItem *item = (IMAPFolderItem *)_item;
4333         IMAPSession *session;
4334         gint nummsgs;
4335         GSList *uidlist = NULL;
4336         gchar *dir;
4337         gint known_list_len = 0;
4338         debug_print("get_num_list\n");
4339
4340         g_return_val_if_fail(folder != NULL, -1);
4341         g_return_val_if_fail(item != NULL, -1);
4342         g_return_val_if_fail(item->item.path != NULL, -1);
4343         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
4344         g_return_val_if_fail(folder->account != NULL, -1);
4345
4346         known_list_len = g_slist_length(item->uid_list);
4347         if (!item->should_update) {
4348                 debug_print("get_num_list: nothing to update\n");
4349                 *old_uids_valid = TRUE;
4350                 if (known_list_len == item->item.total_msgs
4351                  && known_list_len > 0) {
4352                         *msgnum_list = g_slist_copy(item->uid_list);
4353                         return known_list_len;
4354                 } else {
4355                         debug_print("don't know the list length...\n");
4356                 }
4357         }
4358
4359         if (prefs_common.work_offline &&
4360             !inc_offline_should_override(FALSE,
4361                 _("Claws Mail needs network access in order "
4362                   "to access the IMAP server."))) {
4363                 return -1;
4364         }
4365
4366         debug_print("getting session...\n");
4367         session = imap_session_get(folder);
4368         g_return_val_if_fail(session != NULL, -1);
4369
4370         lock_session(session); /* unlocked by get_list_of_uids */
4371         if (FOLDER_ITEM(item)->path)
4372                 statusbar_print_all(_("Scanning folder %s%c%s ..."),
4373                                       FOLDER_ITEM(item)->folder->name,
4374                                       G_DIR_SEPARATOR,
4375                                       FOLDER_ITEM(item)->path);
4376         else
4377                 statusbar_print_all(_("Scanning folder %s ..."),
4378                                       FOLDER_ITEM(item)->folder->name);
4379
4380         if (item->should_trash_cache) {
4381                 *old_uids_valid = FALSE;
4382                 debug_print("get_num_list: trashing num list\n");
4383                 debug_print("Freeing imap uid cache\n");
4384                 item->lastuid = 0;
4385                 g_slist_free(item->uid_list);
4386                 item->uid_list = NULL;
4387
4388                 imap_delete_all_cached_messages((FolderItem *)item);
4389         } else {
4390                 debug_print("get_num_list: updating num list\n");
4391                 *old_uids_valid = TRUE;
4392         }
4393
4394         nummsgs = get_list_of_uids(session, folder, item, &uidlist);
4395         /* session could be broken now, in case of fatal error */
4396
4397         debug_print("get_num_list: got %d msgs\n", nummsgs);
4398
4399         if (nummsgs < 0) {
4400                 statusbar_pop_all();
4401                 return -1;
4402         }
4403
4404         *msgnum_list = uidlist;
4405
4406         dir = folder_item_get_path((FolderItem *)item);
4407         debug_print("removing old messages from %s\n", dir);
4408         remove_numbered_files_not_in_list(dir, *msgnum_list);
4409         g_free(dir);
4410
4411         debug_print("get_num_list - ok - %i\n", nummsgs);
4412         statusbar_pop_all();
4413         item->should_trash_cache = FALSE;
4414         item->should_update = FALSE;
4415         return nummsgs;
4416 }
4417
4418 static MsgInfo *imap_parse_msg(const gchar *file, FolderItem *item)
4419 {
4420         MsgInfo *msginfo;
4421         MsgFlags flags;
4422
4423         flags.perm_flags = MSG_NEW|MSG_UNREAD;
4424         flags.tmp_flags = 0;
4425
4426         g_return_val_if_fail(item != NULL, NULL);
4427         g_return_val_if_fail(file != NULL, NULL);
4428
4429         if (folder_has_parent_of_type(item, F_QUEUE)) {
4430                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
4431         } else if (folder_has_parent_of_type(item, F_DRAFT)) {
4432                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
4433         }
4434
4435         msginfo = procheader_parse_file(file, flags, FALSE, FALSE);
4436         if (!msginfo) return NULL;
4437
4438         msginfo->plaintext_file = g_strdup(file);
4439         msginfo->folder = item;
4440
4441         return msginfo;
4442 }
4443
4444 GSList *imap_get_msginfos(Folder *folder, FolderItem *item,
4445                           GSList *msgnum_list)
4446 {
4447         IMAPSession *session;
4448         MsgInfoList *ret = NULL;
4449         gint ok;
4450
4451         debug_print("get_msginfos\n");
4452
4453         g_return_val_if_fail(folder != NULL, NULL);
4454         g_return_val_if_fail(item != NULL, NULL);
4455         g_return_val_if_fail(msgnum_list != NULL, NULL);
4456
4457         debug_print("getting session...\n");
4458         session = imap_session_get(folder);
4459         g_return_val_if_fail(session != NULL, NULL);
4460
4461         lock_session(session); /* unlocked later in the function */
4462
4463         debug_print("IMAP getting msginfos\n");
4464         ok = imap_select(session, IMAP_FOLDER(folder), item,
4465                          NULL, NULL, NULL, NULL, NULL, FALSE);
4466         if (ok != MAILIMAP_NO_ERROR) {
4467                 return NULL;
4468         }
4469         if (!(folder_has_parent_of_type(item, F_DRAFT) ||
4470               folder_has_parent_of_type(item, F_QUEUE))) {
4471                 ret = g_slist_concat(ret,
4472                         imap_get_uncached_messages(session, item,
4473                                                    msgnum_list, &ok));
4474                 if (ok != MAILIMAP_NO_ERROR)
4475                         return NULL;
4476                 unlock_session(session);
4477         } else {
4478                 MsgNumberList *sorted_list, *elem, *llast = NULL;
4479                 gint startnum, lastnum;
4480
4481                 unlock_session(session);
4482
4483                 sorted_list = g_slist_sort(g_slist_copy(msgnum_list), g_int_compare);
4484
4485                 startnum = lastnum = GPOINTER_TO_INT(sorted_list->data);
4486
4487                 llast = g_slist_last(ret);
4488                 for (elem = sorted_list;; elem = g_slist_next(elem)) {
4489                         guint num = 0;
4490
4491                         if (elem)
4492                                 num = GPOINTER_TO_INT(elem->data);
4493
4494                         if (num > lastnum + 1 || elem == NULL) {
4495                                 int i;
4496                                 for (i = startnum; i <= lastnum; ++i) {
4497                                         gchar *file;
4498                                         file = imap_fetch_msg(folder, item, i);
4499                                         if (file != NULL) {
4500                                                 MsgInfo *msginfo = imap_parse_msg(file, item);
4501                                                 if (msginfo != NULL) {
4502                                                         msginfo->msgnum = i;
4503                                                         if (llast == NULL)
4504                                                                 llast = ret = g_slist_append(ret, msginfo);
4505                                                         else {
4506                                                                 llast = g_slist_append(llast, msginfo);
4507                                                                 llast = llast->next;
4508                                                         }
4509                                                 }
4510                                                 g_free(file);
4511                                         }
4512                                 }
4513
4514                                 if (elem == NULL)
4515                                         break;
4516
4517                                 startnum = num;
4518                         }
4519                         lastnum = num;
4520                 }
4521
4522                 g_slist_free(sorted_list);
4523         }
4524         return ret;
4525 }
4526
4527 MsgInfo *imap_get_msginfo(Folder *folder, FolderItem *item, gint uid)
4528 {
4529         MsgInfo *msginfo = NULL;
4530         MsgInfoList *msginfolist;
4531         MsgNumberList numlist;
4532
4533         numlist.next = NULL;
4534         numlist.data = GINT_TO_POINTER(uid);
4535
4536         msginfolist = imap_get_msginfos(folder, item, &numlist);
4537         if (msginfolist != NULL) {
4538                 msginfo = msginfolist->data;
4539                 g_slist_free(msginfolist);
4540         }
4541
4542         return msginfo;
4543 }
4544
4545 gboolean imap_scan_required(Folder *folder, FolderItem *_item)
4546 {
4547         IMAPSession *session;
4548         IMAPFolderItem *item = (IMAPFolderItem *)_item;
4549         gint ok, exists = 0, unseen = 0;
4550         guint32 uid_next = 0, uid_val = 0;
4551         gboolean selected_folder;
4552
4553         g_return_val_if_fail(folder != NULL, FALSE);
4554         g_return_val_if_fail(item != NULL, FALSE);
4555         g_return_val_if_fail(item->item.folder != NULL, FALSE);
4556         g_return_val_if_fail(FOLDER_CLASS(item->item.folder) == &imap_class, FALSE);
4557
4558         if (item->item.path == NULL)
4559                 return FALSE;
4560
4561         if (item->should_update) {
4562                 debug_print("scan already required\n");
4563                 return TRUE;
4564         }
4565         debug_print("getting session...\n");
4566         session = imap_session_get(folder);
4567
4568         g_return_val_if_fail(session != NULL, FALSE);
4569         lock_session(session); /* unlocked later in the function */
4570
4571         selected_folder = (session->mbox != NULL) &&
4572                           (!strcmp(session->mbox, item->item.path));
4573         if (selected_folder) {
4574                 if (!session->folder_content_changed) {
4575                         ok = imap_cmd_noop(session);
4576                         if (ok != MAILIMAP_NO_ERROR) {
4577                                 debug_print("disconnected!\n");
4578                                 if (!is_fatal(ok))
4579                                         session = imap_reconnect_if_possible(folder, session);
4580                                 else
4581                                         session = imap_session_get(folder);
4582                                 if (session == NULL)
4583                                         return FALSE;
4584                         }
4585
4586                         if (session->folder_content_changed) {
4587                                 debug_print("CHANGED (self-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                         debug_print("CHANGED (previous noop)! scan_required\n");
4598                         item->should_update = TRUE;
4599                         if (session->uid_validity && session->uid_validity != item->item.mtime) {
4600                                 item->item.mtime = session->uid_validity;
4601                                 item->should_trash_cache = TRUE;
4602                         }
4603                         unlock_session(session);
4604                         return TRUE;
4605                 }
4606         } else {
4607                 ok = imap_status(session, IMAP_FOLDER(folder), item->item.path, IMAP_FOLDER_ITEM(item),
4608                                  &exists, &uid_next, &uid_val, &unseen, FALSE);
4609                 if (ok != MAILIMAP_NO_ERROR) {
4610                         return FALSE;
4611                 }
4612
4613                 debug_print("exists %d, item->item.total_msgs %d\n",
4614                         exists, item->item.total_msgs);
4615                 if (exists != item->item.total_msgs
4616                     || unseen != item->item.unread_msgs
4617                     || uid_next != item->uid_next
4618                     || uid_val != item->item.mtime) {
4619                         debug_print("CHANGED (status)! scan_required\n");
4620                         item->last_change = time(NULL);
4621                         item->should_update = TRUE;
4622                         item->uid_next = uid_next;
4623                         if (uid_val != item->item.mtime) {
4624                                 item->item.mtime = uid_val;
4625                                 item->should_trash_cache = TRUE;
4626                         }
4627                         unlock_session(session);
4628                         return TRUE;
4629                 }
4630         }
4631         unlock_session(session);
4632
4633         item->should_update = FALSE;
4634         return FALSE;
4635 }
4636
4637 void imap_change_flags(Folder *folder, FolderItem *item, MsgInfo *msginfo, MsgPermFlags newflags)
4638 {
4639         IMAPSession *session;
4640         IMAPFlags flags_set = 0, flags_unset = 0;
4641         gint ok = MAILIMAP_NO_ERROR;
4642         MsgNumberList numlist;
4643         hashtable_data *ht_data = NULL;
4644
4645         g_return_if_fail(folder != NULL);
4646         g_return_if_fail(folder->klass == &imap_class);
4647         g_return_if_fail(item != NULL);
4648         g_return_if_fail(item->folder == folder);
4649         g_return_if_fail(msginfo != NULL);
4650         g_return_if_fail(msginfo->folder == item);
4651
4652         if (!MSG_IS_MARKED(msginfo->flags) &&  (newflags & MSG_MARKED))
4653                 flags_set |= IMAP_FLAG_FLAGGED;
4654         if ( MSG_IS_MARKED(msginfo->flags) && !(newflags & MSG_MARKED))
4655                 flags_unset |= IMAP_FLAG_FLAGGED;
4656
4657         if (!MSG_IS_UNREAD(msginfo->flags) &&  (newflags & MSG_UNREAD))
4658                 flags_unset |= IMAP_FLAG_SEEN;
4659         if ( MSG_IS_UNREAD(msginfo->flags) && !(newflags & MSG_UNREAD))
4660                 flags_set |= IMAP_FLAG_SEEN;
4661
4662         if (!MSG_IS_REPLIED(msginfo->flags) &&  (newflags & MSG_REPLIED))
4663                 flags_set |= IMAP_FLAG_ANSWERED;
4664         if ( MSG_IS_REPLIED(msginfo->flags) && !(newflags & MSG_REPLIED))
4665                 flags_unset |= IMAP_FLAG_ANSWERED;
4666
4667         if (!MSG_IS_FORWARDED(msginfo->flags) &&  (newflags & MSG_FORWARDED))
4668                 flags_set |= IMAP_FLAG_FORWARDED;
4669         if ( MSG_IS_FORWARDED(msginfo->flags) && !(newflags & MSG_FORWARDED))
4670                 flags_unset |= IMAP_FLAG_FORWARDED;
4671
4672         if (!MSG_IS_SPAM(msginfo->flags) &&  (newflags & MSG_SPAM)) {
4673                 flags_set |= IMAP_FLAG_SPAM;
4674                 flags_unset |= IMAP_FLAG_HAM;
4675         }
4676         if ( MSG_IS_SPAM(msginfo->flags) && !(newflags & MSG_SPAM)) {
4677                 flags_set |= IMAP_FLAG_HAM;
4678                 flags_unset |= IMAP_FLAG_SPAM;
4679         }
4680         if (!MSG_IS_DELETED(msginfo->flags) &&  (newflags & MSG_DELETED))
4681                 flags_set |= IMAP_FLAG_DELETED;
4682         if ( MSG_IS_DELETED(msginfo->flags) && !(newflags & MSG_DELETED))
4683                 flags_unset |= IMAP_FLAG_DELETED;
4684
4685         if (!flags_set && !flags_unset) {
4686                 /* the changed flags were not translatable to IMAP-speak.
4687                  * like MSG_POSTFILTERED, so just apply. */
4688                 msginfo->flags.perm_flags = newflags;
4689                 return;
4690         }
4691
4692         debug_print("getting session...\n");
4693         session = imap_session_get(folder);
4694         if (!session) {
4695                 return;
4696         }
4697
4698         if ((ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
4699             NULL, NULL, NULL, NULL, NULL, FALSE)) != MAILIMAP_NO_ERROR) {
4700                 return;
4701         }
4702         numlist.next = NULL;
4703         numlist.data = GINT_TO_POINTER(msginfo->msgnum);
4704
4705         if (IMAP_FOLDER_ITEM(item)->batching) {
4706                 /* instead of performing an UID STORE command for each message change,
4707                  * as a lot of them can change "together", we just fill in hashtables
4708                  * and defer the treatment so that we're able to send only one
4709                  * command.
4710                  */
4711                 debug_print("IMAP batch mode on, deferring flags change\n");
4712                 if (flags_set) {
4713                         ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->flags_set_table,
4714                                 GINT_TO_POINTER(flags_set));
4715                         if (ht_data == NULL) {
4716                                 ht_data = g_new0(hashtable_data, 1);
4717                                 ht_data->item = IMAP_FOLDER_ITEM(item);
4718                                 g_hash_table_insert(IMAP_FOLDER_ITEM(item)->flags_set_table,
4719                                         GINT_TO_POINTER(flags_set), ht_data);
4720                         }
4721                         ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
4722                 }
4723                 if (flags_unset) {
4724                         ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->flags_unset_table,
4725                                 GINT_TO_POINTER(flags_unset));
4726                         if (ht_data == NULL) {
4727                                 ht_data = g_new0(hashtable_data, 1);
4728                                 ht_data->item = IMAP_FOLDER_ITEM(item);
4729                                 g_hash_table_insert(IMAP_FOLDER_ITEM(item)->flags_unset_table,
4730                                         GINT_TO_POINTER(flags_unset), ht_data);
4731                         }
4732                         ht_data->msglist = g_slist_prepend(ht_data->msglist,
4733                                         GINT_TO_POINTER(msginfo->msgnum));
4734                 }
4735         } else {
4736                 debug_print("IMAP changing flags\n");
4737                 if (flags_set) {
4738                         ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item), &numlist, flags_set, NULL, TRUE);
4739                         if (ok != MAILIMAP_NO_ERROR) {
4740                                 return;
4741                         }
4742                 }
4743
4744                 if (flags_unset) {
4745                         ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item), &numlist, flags_unset, NULL, FALSE);
4746                         if (ok != MAILIMAP_NO_ERROR) {
4747                                 return;
4748                         }
4749                 }
4750         }
4751         msginfo->flags.perm_flags = newflags;
4752         return;
4753 }
4754
4755 static gint imap_remove_msg(Folder *folder, FolderItem *item, gint uid)
4756 {
4757         gint ok;
4758         IMAPSession *session;
4759         gchar *dir;
4760         MsgNumberList numlist;
4761
4762         g_return_val_if_fail(folder != NULL, -1);
4763         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
4764         g_return_val_if_fail(item != NULL, -1);
4765
4766         debug_print("getting session...\n");
4767         session = imap_session_get(folder);
4768         if (!session) return -1;
4769
4770         ok = imap_select(session, IMAP_FOLDER(folder), item,
4771                          NULL, NULL, NULL, NULL, NULL, FALSE);
4772         if (ok != MAILIMAP_NO_ERROR) {
4773                 return ok;
4774         }
4775         numlist.next = NULL;
4776         numlist.data = GINT_TO_POINTER(uid);
4777
4778         ok = imap_set_message_flags
4779                 (session, IMAP_FOLDER_ITEM(item), &numlist, IMAP_FLAG_DELETED, NULL, TRUE);
4780         if (ok != MAILIMAP_NO_ERROR) {
4781                 log_warning(LOG_PROTOCOL, _("can't set deleted flags: %d\n"), uid);
4782                 return ok;
4783         }
4784
4785         ok = imap_cmd_expunge(session, folder->account->imap_use_trash);
4786
4787         if (ok != MAILIMAP_NO_ERROR) {
4788                 log_warning(LOG_PROTOCOL, _("can't expunge\n"));
4789                 return ok;
4790         }
4791
4792         IMAP_FOLDER_ITEM(item)->uid_list = g_slist_remove(
4793             IMAP_FOLDER_ITEM(item)->uid_list, numlist.data);
4794         dir = folder_item_get_path(item);
4795         if (is_dir_exist(dir))
4796                 remove_numbered_files(dir, uid, uid);
4797         g_free(dir);
4798         return MAILIMAP_NO_ERROR;
4799 }
4800
4801 static gint compare_msginfo(gconstpointer a, gconstpointer b)
4802 {
4803         return ((MsgInfo *)a)->msgnum - ((MsgInfo *)b)->msgnum;
4804 }
4805
4806 static guint gslist_find_next_num(MsgNumberList **list, guint num)
4807 {
4808         GSList *elem;
4809
4810         g_return_val_if_fail(list != NULL, -1);
4811
4812         for (elem = *list; elem != NULL; elem = g_slist_next(elem))
4813                 if (GPOINTER_TO_INT(elem->data) >= num)
4814                         break;
4815         *list = elem;
4816         return elem != NULL ? GPOINTER_TO_INT(elem->data) : (gint)-1;
4817 }
4818
4819 static gboolean flag_ok(IMAPFolderItem *item, guint flag)
4820 {
4821         if (item->ok_flags && g_slist_find(item->ok_flags, GUINT_TO_POINTER(flag))) {
4822                 debug_print("flag %d is OK\n", flag);
4823                 return TRUE;
4824         }
4825         if (item->can_create_flags == ITEM_CAN_CREATE_FLAGS) {
4826                 debug_print("creating flags is OK\n");
4827                 return TRUE;
4828         }
4829         return FALSE;
4830 }
4831
4832 /*
4833  * NEW and DELETED flags are not syncronized
4834  * - The NEW/RECENT flags in IMAP folders can not really be directly
4835  *   modified by Sylpheed
4836  * - The DELETE/DELETED flag in IMAP and Sylpheed don't have the same
4837  *   meaning, in IMAP it always removes the messages from the FolderItem
4838  *   in Sylpheed it can mean to move the message to trash
4839  */
4840
4841 typedef struct _get_flags_data {
4842         Folder *folder;
4843         FolderItem *item;
4844         MsgInfoList *msginfo_list;
4845         GHashTable *msgflags;
4846         gboolean full_search;
4847         gboolean done;
4848 } get_flags_data;
4849
4850 static /*gint*/ void *imap_get_flags_thread(void *data)
4851 {
4852         get_flags_data *stuff = (get_flags_data *)data;
4853         Folder *folder = stuff->folder;
4854         FolderItem *fitem = (FolderItem *) stuff->item;
4855         MsgInfoList *msginfo_list = stuff->msginfo_list;
4856         GHashTable *msgflags = stuff->msgflags;
4857         GSList *elem;
4858         carray * lep_uidtab;
4859         IMAPSession *session;
4860         gint ok;
4861         int r = MAILIMAP_NO_ERROR;
4862         GHashTable *flags_hash = NULL;
4863         GHashTable *tags_hash = NULL;
4864         gboolean full_search = stuff->full_search;
4865         GSList *sorted_list = NULL;
4866         GSList *unseen = NULL, *answered = NULL, *flagged = NULL, *deleted = NULL, *forwarded = NULL, *spam = NULL;
4867         GSList *seq_list, *cur;
4868         gboolean reverse_seen = FALSE;
4869         gboolean selected_folder;
4870         gint exists_cnt, unseen_cnt;
4871         gboolean got_alien_tags = FALSE;
4872
4873         session = imap_session_get(folder);
4874
4875         if (session == NULL) {
4876                 stuff->done = TRUE;
4877                 return GINT_TO_POINTER(-1);
4878         }
4879         selected_folder = (session->mbox != NULL) &&
4880                           (!strcmp(session->mbox, fitem->path));
4881
4882         lock_session(session);
4883         if (!selected_folder) {
4884                 ok = imap_select(session, IMAP_FOLDER(folder), fitem,
4885                         &exists_cnt, NULL, &unseen_cnt, NULL, NULL, TRUE);
4886                 if (ok != MAILIMAP_NO_ERROR) {
4887                         stuff->done = TRUE;
4888                         return GINT_TO_POINTER(-1);
4889                 }
4890
4891                 if (unseen_cnt > exists_cnt / 2)
4892                         reverse_seen = TRUE;
4893         }
4894         else {
4895                 if (fitem->unread_msgs > fitem->total_msgs / 2)
4896                         reverse_seen = TRUE;
4897         }
4898
4899         sorted_list = g_slist_sort(g_slist_copy(msginfo_list), compare_msginfo);
4900         if (!full_search) {
4901                 seq_list = imap_get_lep_set_from_msglist(IMAP_FOLDER(folder), msginfo_list);
4902         } else {
4903                 struct mailimap_set * set;
4904                 set = mailimap_set_new_interval(1, 0);
4905                 seq_list = g_slist_append(NULL, set);
4906         }
4907
4908         if (folder->account && folder->account->low_bandwidth) {
4909                 for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
4910                         struct mailimap_set * imapset;
4911                         clist * lep_uidlist;
4912                         int r;
4913
4914                         imapset = cur->data;
4915                         if (reverse_seen) {
4916                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SEEN, NULL,
4917                                                          full_search ? NULL:imapset, &lep_uidlist);
4918                         }
4919                         else {
4920                                 r = imap_threaded_search(folder,
4921                                                          IMAP_SEARCH_TYPE_UNSEEN, NULL,
4922                                                          full_search ? NULL:imapset, &lep_uidlist);
4923                         }
4924                         if (r == MAILIMAP_NO_ERROR) {
4925                                 GSList * uidlist;
4926
4927                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
4928                                 mailimap_search_result_free(lep_uidlist);
4929
4930                                 unseen = g_slist_concat(unseen, uidlist);
4931                         } else {
4932                                 imap_handle_error(SESSION(session), NULL, r);
4933                                 goto bail;
4934                         }
4935
4936                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_FLAGGED, NULL,
4937                                                  full_search ? NULL:imapset, &lep_uidlist);
4938                         if (r == MAILIMAP_NO_ERROR) {
4939                                 GSList * uidlist;
4940
4941                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
4942                                 mailimap_search_result_free(lep_uidlist);
4943
4944                                 flagged = g_slist_concat(flagged, uidlist);
4945                         } else {
4946                                 imap_handle_error(SESSION(session), NULL, r);
4947                                 goto bail;
4948                         }
4949
4950                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
4951                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_ANSWERED, NULL,
4952                                                          full_search ? NULL:imapset, &lep_uidlist);
4953                                 if (r == MAILIMAP_NO_ERROR) {
4954                                         GSList * uidlist;
4955
4956                                         uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
4957                                         mailimap_search_result_free(lep_uidlist);
4958
4959                                         answered = g_slist_concat(answered, uidlist);
4960                                 } else {
4961                                         imap_handle_error(SESSION(session), NULL, r);
4962                                         goto bail;
4963                                 }
4964
4965                                 if (flag_ok(IMAP_FOLDER_ITEM(fitem), IMAP_FLAG_FORWARDED)) {
4966                                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_FORWARDED, NULL,
4967                                                                  full_search ? NULL:imapset, &lep_uidlist);
4968                                         if (r == MAILIMAP_NO_ERROR) {
4969                                                 GSList * uidlist;
4970
4971                                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
4972                                                 mailimap_search_result_free(lep_uidlist);
4973
4974                                                 forwarded = g_slist_concat(forwarded, uidlist);
4975                                         } else {
4976                                                 imap_handle_error(SESSION(session), NULL, r);
4977                                                 goto bail;
4978                                         }
4979                                 }
4980
4981                                 if (flag_ok(IMAP_FOLDER_ITEM(fitem), IMAP_FLAG_SPAM)) {
4982                                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SPAM, NULL,
4983                                                                  full_search ? NULL:imapset, &lep_uidlist);
4984                                         if (r == MAILIMAP_NO_ERROR) {
4985                                                 GSList * uidlist;
4986
4987                                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
4988                                                 mailimap_search_result_free(lep_uidlist);
4989
4990                                                 spam = g_slist_concat(spam, uidlist);
4991                                         } else {
4992                                                 imap_handle_error(SESSION(session), NULL, r);
4993                                                 goto bail;
4994                                         }
4995                                 }
4996
4997                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_DELETED, NULL,
4998                                                          full_search ? NULL:imapset, &lep_uidlist);
4999                                 if (r == MAILIMAP_NO_ERROR) {
5000                                         GSList * uidlist;
5001
5002                                         uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5003                                         mailimap_search_result_free(lep_uidlist);
5004
5005                                         deleted = g_slist_concat(deleted, uidlist);
5006                                 } else {
5007                                         imap_handle_error(SESSION(session), NULL, r);
5008                                         goto bail;
5009                                 }
5010                         }
5011                 }
5012
5013         } else {
5014                 r = imap_threaded_fetch_uid_flags(folder, 1, &lep_uidtab);
5015                 if (r == MAILIMAP_NO_ERROR) {
5016                         flags_hash = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, NULL);
5017                         tags_hash = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, NULL);
5018                         imap_flags_hash_from_lep_uid_flags_tab(lep_uidtab, flags_hash, tags_hash);
5019                         imap_fetch_uid_flags_list_free(lep_uidtab);
5020                 } else {
5021                         imap_handle_error(SESSION(session), NULL, r);
5022                         goto bail;
5023                 }
5024         }
5025
5026 bail:
5027         if (r == MAILIMAP_NO_ERROR)
5028                 unlock_session(session);
5029
5030         for (elem = sorted_list; elem != NULL; elem = g_slist_next(elem)) {
5031                 MsgInfo *msginfo;
5032                 MsgPermFlags flags, oldflags;
5033                 gboolean wasnew;
5034
5035                 msginfo = (MsgInfo *) elem->data;
5036                 flags = msginfo->flags.perm_flags;
5037                 wasnew = (flags & MSG_NEW);
5038                 oldflags = flags & ~(MSG_NEW|MSG_UNREAD|MSG_REPLIED|MSG_FORWARDED|MSG_MARKED|MSG_DELETED|MSG_SPAM);
5039
5040                 if (folder->account && folder->account->low_bandwidth) {
5041                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
5042                                 flags &= ~((reverse_seen ? 0 : MSG_UNREAD | MSG_NEW) | MSG_REPLIED | MSG_FORWARDED | MSG_MARKED | MSG_SPAM);
5043                         } else {
5044                                 flags &= ~((reverse_seen ? 0 : MSG_UNREAD | MSG_NEW | MSG_MARKED));
5045                         }
5046                         if (reverse_seen)
5047                                 flags |= MSG_UNREAD | (wasnew ? MSG_NEW : 0);
5048                         if (gslist_find_next_num(&unseen, msginfo->msgnum) == msginfo->msgnum) {
5049                                 if (!reverse_seen) {
5050                                         flags |= MSG_UNREAD | (wasnew ? MSG_NEW : 0);
5051                                 } else {
5052                                         flags &= ~(MSG_UNREAD | MSG_NEW);
5053                                 }
5054                         }
5055
5056                         if (gslist_find_next_num(&flagged, msginfo->msgnum) == msginfo->msgnum)
5057                                 flags |= MSG_MARKED;
5058                         else
5059                                 flags &= ~MSG_MARKED;
5060
5061                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
5062                                 if (gslist_find_next_num(&answered, msginfo->msgnum) == msginfo->msgnum)
5063                                         flags |= MSG_REPLIED;
5064                                 else
5065                                         flags &= ~MSG_REPLIED;
5066                                 if (gslist_find_next_num(&forwarded, msginfo->msgnum) == msginfo->msgnum)
5067                                         flags |= MSG_FORWARDED;
5068                                 else
5069                                         flags &= ~MSG_FORWARDED;
5070                                 if (gslist_find_next_num(&spam, msginfo->msgnum) == msginfo->msgnum)
5071                                         flags |= MSG_SPAM;
5072                                 else
5073                                         flags &= ~MSG_SPAM;
5074                                 if (gslist_find_next_num(&deleted, msginfo->msgnum) == msginfo->msgnum)
5075                                         flags |= MSG_DELETED;
5076                                 else
5077                                         flags &= ~MSG_DELETED;
5078                         }
5079                 } else {
5080                         if (flags_hash != NULL) {
5081
5082                                 flags = GPOINTER_TO_INT(g_hash_table_lookup(flags_hash,
5083                                                 GINT_TO_POINTER(msginfo->msgnum)));
5084                         }
5085
5086                         if ((flags & MSG_UNREAD) == 0)
5087                                 flags &= ~MSG_NEW;
5088                         else if (wasnew)
5089                                 flags |= MSG_NEW;
5090                         flags |= oldflags;
5091
5092                         if (tags_hash != NULL) {
5093                                 GSList *tags = g_hash_table_lookup(tags_hash, GINT_TO_POINTER(msginfo->msgnum));
5094                                 GSList *cur;
5095
5096                                 g_slist_free(msginfo->tags);
5097                                 msginfo->tags = NULL;
5098
5099                                 for (cur = tags; cur; cur = cur->next) {
5100                                         gchar *real_tag = imap_modified_utf7_to_utf8(cur->data, TRUE);
5101                                         gint id = 0;
5102                                         id = tags_get_id_for_str(real_tag);
5103                                         if (id == -1) {
5104                                                 id = tags_add_tag(real_tag);
5105                                                 got_alien_tags = TRUE;
5106                                         }
5107                                         msginfo->tags = g_slist_append(
5108                                                                 msginfo->tags,
5109                                                                 GINT_TO_POINTER(id));
5110                                         g_free(real_tag);
5111                                 }
5112                                 slist_free_strings(tags);
5113                                 g_slist_free(tags);
5114                         }
5115                 }
5116
5117                 g_hash_table_insert(msgflags, msginfo, GINT_TO_POINTER(flags));
5118         }
5119
5120         if (got_alien_tags) {
5121                 tags_write_tags();
5122                 main_window_reflect_tags_changes(mainwindow_get_mainwindow());
5123         }
5124
5125         if (flags_hash)
5126                 g_hash_table_destroy(flags_hash);
5127         if (tags_hash)
5128                 g_hash_table_destroy(tags_hash);
5129
5130         imap_lep_set_free(seq_list);
5131         g_slist_free(flagged);
5132         g_slist_free(deleted);
5133         g_slist_free(answered);
5134         g_slist_free(forwarded);
5135         g_slist_free(spam);
5136         g_slist_free(unseen);
5137         g_slist_free(sorted_list);
5138
5139         stuff->done = TRUE;
5140         return GINT_TO_POINTER(0);
5141 }
5142
5143 static gint imap_get_flags(Folder *folder, FolderItem *item,
5144                            MsgInfoList *msginfo_list, GHashTable *msgflags)
5145 {
5146         gint result;
5147         get_flags_data *data = g_new0(get_flags_data, 1);
5148         data->done = FALSE;
5149         data->folder = folder;
5150         data->item = item;
5151         data->msginfo_list = msginfo_list;
5152         data->msgflags = msgflags;
5153         data->full_search = FALSE;
5154
5155         GSList *tmp = NULL, *cur;
5156
5157         if (prefs_common.work_offline &&
5158             !inc_offline_should_override(FALSE,
5159                 _("Claws Mail needs network access in order "
5160                   "to access the IMAP server."))) {
5161                 g_free(data);
5162                 return -1;
5163         }
5164
5165         tmp = folder_item_get_msg_list(item);
5166
5167         if (g_slist_length(tmp) <= g_slist_length(msginfo_list))
5168                 data->full_search = TRUE;
5169
5170         for (cur = tmp; cur; cur = cur->next)
5171                 procmsg_msginfo_free((MsgInfo *)cur->data);
5172
5173         g_slist_free(tmp);
5174
5175         result = GPOINTER_TO_INT(imap_get_flags_thread(data));
5176
5177         g_free(data);
5178         return result;
5179
5180 }
5181
5182 static gboolean process_flags(gpointer key, gpointer value, gpointer user_data)
5183 {
5184         gboolean flags_set = GPOINTER_TO_INT(user_data);
5185         gint flags_value = GPOINTER_TO_INT(key);
5186         hashtable_data *data = (hashtable_data *)value;
5187         IMAPFolderItem *_item = data->item;
5188         FolderItem *item = (FolderItem *)_item;
5189         gint ok = MAILIMAP_ERROR_BAD_STATE;
5190         IMAPSession *session = NULL;
5191
5192         debug_print("getting session...\n");
5193         session = imap_session_get(item->folder);
5194
5195         data->msglist = g_slist_reverse(data->msglist);
5196
5197         debug_print("IMAP %ssetting flags to %d for %d messages\n",
5198                 flags_set?"":"un",
5199                 flags_value,
5200                 g_slist_length(data->msglist));
5201
5202         lock_session(session);
5203         if (session) {
5204                 ok = imap_select(session, IMAP_FOLDER(item->folder), item,
5205                          NULL, NULL, NULL, NULL, NULL, FALSE);
5206         }
5207         if (ok == MAILIMAP_NO_ERROR) {
5208                 ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item),
5209                         data->msglist, flags_value, NULL, flags_set);
5210         } else {
5211                 g_warning("can't select mailbox %s\n", item->path);
5212         }
5213
5214         if (!is_fatal(ok))
5215                 unlock_session(session);
5216
5217         g_slist_free(data->msglist);
5218         g_free(data);
5219         return TRUE;
5220 }
5221
5222 static gboolean process_tags(gpointer key, gpointer value, gpointer user_data)
5223 {
5224         gboolean tags_set = GPOINTER_TO_INT(user_data);
5225         TagsData *data = (TagsData *)value;
5226         IMAPFolderItem *_item = data->item;
5227         FolderItem *item = (FolderItem *)_item;
5228         gchar *str = data->str;
5229         gint ok = MAILIMAP_ERROR_BAD_STATE;
5230         IMAPSession *session = NULL;
5231
5232         debug_print("getting session...\n");
5233         session = imap_session_get(item->folder);
5234
5235         data->msglist = g_slist_reverse(data->msglist);
5236
5237         debug_print("IMAP %ssetting tags %s for %d messages\n",
5238                 tags_set?"":"un",
5239                 str,
5240                 g_slist_length(data->msglist));
5241
5242         lock_session(session);
5243         if (session) {
5244                 ok = imap_select(session, IMAP_FOLDER(item->folder), item,
5245                          NULL, NULL, NULL, NULL, NULL, FALSE);
5246         }
5247         if (ok == MAILIMAP_NO_ERROR) {
5248                 GSList list;
5249                 list.data = str;
5250                 list.next = NULL;
5251                 ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item),
5252                         data->msglist, 0, &list, tags_set);
5253         } else {
5254                 g_warning("can't select mailbox %s\n", item->path);
5255         }
5256
5257         if (!is_fatal(ok))
5258                 unlock_session(session);
5259
5260         g_slist_free(data->msglist);
5261         g_free(data->str);
5262         g_free(data);
5263         return TRUE;
5264 }
5265
5266 static void process_hashtable(IMAPFolderItem *item)
5267 {
5268         if (item->flags_set_table) {
5269                 g_hash_table_foreach_remove(item->flags_set_table, process_flags, GINT_TO_POINTER(TRUE));
5270                 g_hash_table_destroy(item->flags_set_table);
5271                 item->flags_set_table = NULL;
5272         }
5273         if (item->flags_unset_table) {
5274                 g_hash_table_foreach_remove(item->flags_unset_table, process_flags, GINT_TO_POINTER(FALSE));
5275                 g_hash_table_destroy(item->flags_unset_table);
5276                 item->flags_unset_table = NULL;
5277         }
5278         if (item->tags_set_table) {
5279                 g_hash_table_foreach_remove(item->tags_set_table, process_tags, GINT_TO_POINTER(TRUE));
5280                 g_hash_table_destroy(item->tags_set_table);
5281                 item->tags_set_table = NULL;
5282         }
5283         if (item->tags_unset_table) {
5284                 g_hash_table_foreach_remove(item->tags_unset_table, process_tags, GINT_TO_POINTER(FALSE));
5285                 g_hash_table_destroy(item->tags_unset_table);
5286                 item->tags_unset_table = NULL;
5287         }
5288
5289 }
5290
5291 static void imap_set_batch (Folder *folder, FolderItem *_item, gboolean batch)
5292 {
5293         IMAPFolderItem *item = (IMAPFolderItem *)_item;
5294         IMAPSession *session;
5295
5296         g_return_if_fail(item != NULL);
5297
5298         if (item->batching == batch)
5299                 return;
5300
5301         if (batch) {
5302                 item->batching = TRUE;
5303                 debug_print("IMAP switching to batch mode\n");
5304                 if (!item->flags_set_table) {
5305                         item->flags_set_table = g_hash_table_new(NULL, g_direct_equal);
5306                 }
5307                 if (!item->flags_unset_table) {
5308                         item->flags_unset_table = g_hash_table_new(NULL, g_direct_equal);
5309                 }
5310                 if (!item->tags_set_table) {
5311                         item->tags_set_table = g_hash_table_new(NULL, g_direct_equal);
5312                 }
5313                 if (!item->tags_unset_table) {
5314                         item->tags_unset_table = g_hash_table_new(NULL, g_direct_equal);
5315                 }
5316                 session = imap_session_get(folder);
5317                 if (session) {
5318                         imap_refresh_sensitivity(session);
5319                         session->sens_update_block = TRUE;
5320                 }
5321         } else {
5322                 debug_print("IMAP switching away from batch mode\n");
5323                 /* process stuff */
5324                 process_hashtable(item);
5325                 item->batching = FALSE;
5326                 session = imap_session_get(folder);
5327                 if (session) {
5328                         session->sens_update_block = FALSE;
5329                         imap_refresh_sensitivity(session);
5330                 }
5331         }
5332 }
5333
5334
5335
5336 /* data types conversion libetpan <-> claws */
5337
5338
5339
5340 #define ETPAN_IMAP_MB_MARKED      1
5341 #define ETPAN_IMAP_MB_UNMARKED    2
5342 #define ETPAN_IMAP_MB_NOSELECT    4
5343 #define ETPAN_IMAP_MB_NOINFERIORS 8
5344
5345 static int imap_flags_to_flags(struct mailimap_mbx_list_flags * imap_flags)
5346 {
5347   int flags;
5348   clistiter * cur;
5349
5350   flags = 0;
5351   if (imap_flags->mbf_type == MAILIMAP_MBX_LIST_FLAGS_SFLAG) {
5352     switch (imap_flags->mbf_sflag) {
5353     case MAILIMAP_MBX_LIST_SFLAG_MARKED:
5354       flags |= ETPAN_IMAP_MB_MARKED;
5355       break;
5356     case MAILIMAP_MBX_LIST_SFLAG_NOSELECT:
5357       flags |= ETPAN_IMAP_MB_NOSELECT;
5358       break;
5359     case MAILIMAP_MBX_LIST_SFLAG_UNMARKED:
5360       flags |= ETPAN_IMAP_MB_UNMARKED;
5361       break;
5362     }
5363   }
5364
5365   if (imap_flags->mbf_oflags) {
5366     for(cur = clist_begin(imap_flags->mbf_oflags) ; cur != NULL ;
5367         cur = clist_next(cur)) {
5368       struct mailimap_mbx_list_oflag * oflag;
5369
5370       oflag = clist_content(cur);
5371
5372       switch (oflag->of_type) {
5373       case MAILIMAP_MBX_LIST_OFLAG_NOINFERIORS:
5374         flags |= ETPAN_IMAP_MB_NOINFERIORS;
5375         break;
5376       }
5377     }
5378   }
5379   return flags;
5380 }
5381
5382 static GSList * imap_list_from_lep(IMAPFolder * folder,
5383                                    clist * list, const gchar * real_path, gboolean all)
5384 {
5385         clistiter * iter;
5386         GSList * item_list = NULL, *llast = NULL;
5387
5388         if (list) {
5389                 for(iter = clist_begin(list) ; iter != NULL ;
5390                     iter = clist_next(iter)) {
5391                         struct mailimap_mailbox_list * mb;
5392                         int flags;
5393                         char delimiter;
5394                         char * name;
5395                         char * dup_name;
5396                         gchar * base;
5397                         gchar * loc_name;
5398                         gchar * loc_path;
5399                         FolderItem *new_item;
5400
5401                         mb = clist_content(iter);
5402
5403                         if (mb == NULL)
5404                                 continue;
5405
5406                         flags = 0;
5407                         if (mb->mb_flag != NULL)
5408                                 flags = imap_flags_to_flags(mb->mb_flag);
5409
5410                         delimiter = mb->mb_delimiter;
5411                         name = mb->mb_name;
5412
5413                         dup_name = strdup(name);
5414                         if (delimiter != '\0')
5415                                 subst_char(dup_name, delimiter, '/');
5416
5417                         base = g_path_get_basename(dup_name);
5418                         if (base[0] == '.') {
5419                                 g_free(base);
5420                                 free(dup_name);
5421                                 continue;
5422                         }
5423                         if (!all && path_cmp(name, real_path) == 0) {
5424                                 g_free(base);
5425                                 free(dup_name);
5426                                 continue;
5427                         }
5428
5429                         if (!all && dup_name[strlen(dup_name)-1] == '/') {
5430                                 dup_name[strlen(dup_name)-1] = '\0';
5431                         }
5432
5433                         loc_name = imap_modified_utf7_to_utf8(base, FALSE);
5434                         loc_path = imap_modified_utf7_to_utf8(dup_name, FALSE);
5435
5436                         new_item = folder_item_new(FOLDER(folder), loc_name, loc_path);
5437                         if ((flags & ETPAN_IMAP_MB_NOINFERIORS) != 0)
5438                                 new_item->no_sub = TRUE;
5439                         if (strcmp(dup_name, "INBOX") != 0 &&
5440                             ((flags & ETPAN_IMAP_MB_NOSELECT) != 0))
5441                                 new_item->no_select = TRUE;
5442
5443                         if (item_list == NULL)
5444                                 llast = item_list = g_slist_append(item_list, new_item);
5445                         else {
5446                                 llast = g_slist_append(llast, new_item);
5447                                 llast = llast->next;
5448                         }
5449                         debug_print("folder '%s' found.\n", loc_path);
5450                         g_free(base);
5451                         g_free(loc_path);
5452                         g_free(loc_name);
5453
5454                         free(dup_name);
5455                 }
5456         }
5457         return item_list;
5458 }
5459
5460 static GSList * imap_get_lep_set_from_numlist(IMAPFolder *folder, MsgNumberList *numlist)
5461 {
5462         GSList *sorted_list, *cur;
5463         guint first, last, next;
5464         GSList *ret_list = NULL, *llast = NULL;
5465         struct mailimap_set * current_set;
5466         unsigned int item_count;
5467
5468         if (numlist == NULL)
5469                 return NULL;
5470
5471         current_set = mailimap_set_new_empty();
5472
5473         sorted_list = g_slist_copy(numlist);
5474         sorted_list = g_slist_sort(sorted_list, g_int_compare);
5475
5476         first = GPOINTER_TO_INT(sorted_list->data);
5477
5478         item_count = 0;
5479         for (cur = sorted_list; cur != NULL; cur = g_slist_next(cur)) {
5480                 if (GPOINTER_TO_INT(cur->data) == 0)
5481                         continue;
5482
5483                 item_count ++;
5484
5485                 last = GPOINTER_TO_INT(cur->data);
5486                 if (cur->next)
5487                         next = GPOINTER_TO_INT(cur->next->data);
5488                 else
5489                         next = 0;
5490
5491                 if (last + 1 != next || next == 0 || item_count >= folder->max_set_size) {
5492
5493                         struct mailimap_set_item * item;
5494                         item = mailimap_set_item_new(first, last);
5495                         mailimap_set_add(current_set, item);
5496
5497                         first = next;
5498
5499                         if (item_count >= folder->max_set_size) {
5500                                 if (ret_list == NULL)
5501                                         llast = ret_list = g_slist_append(ret_list,
5502                                                           current_set);
5503                                 else {
5504                                         llast = g_slist_append(llast, current_set);
5505                                         llast = llast->next;
5506                                 }
5507
5508                                 current_set = mailimap_set_new_empty();
5509                                 item_count = 0;
5510                         }
5511                 }
5512         }
5513
5514         if (clist_count(current_set->set_list) > 0) {
5515                 ret_list = g_slist_append(ret_list,
5516                                           current_set);
5517         }
5518
5519         g_slist_free(sorted_list);
5520
5521         return ret_list;
5522 }
5523
5524 static GSList * imap_get_lep_set_from_msglist(IMAPFolder *folder, MsgInfoList *msglist)
5525 {
5526         MsgNumberList *numlist = NULL;
5527         GSList *seq_list;
5528
5529         numlist = procmsg_get_number_list_for_msgs(msglist);
5530
5531         seq_list = imap_get_lep_set_from_numlist(folder, numlist);
5532         g_slist_free(numlist);
5533
5534         return seq_list;
5535 }
5536
5537 static GSList * imap_uid_list_from_lep(clist * list, gint* length)
5538 {
5539         clistiter * iter;
5540         GSList * result;
5541         gint len = 0;
5542
5543         result = NULL;
5544
5545         if (list) {
5546                 for(iter = clist_begin(list) ; iter != NULL ;
5547                     iter = clist_next(iter)) {
5548                         uint32_t * puid;
5549
5550                         puid = clist_content(iter);
5551                         result = g_slist_prepend(result, GINT_TO_POINTER(* puid));
5552                         len++;
5553                 }
5554                 result = g_slist_reverse(result);
5555         }
5556         if (length)
5557                 *length = len;
5558         return result;
5559 }
5560
5561 static GSList * imap_uid_list_from_lep_tab(carray * list)
5562 {
5563         unsigned int i;
5564         GSList * result;
5565
5566         result = NULL;
5567
5568         for(i = 0 ; i < carray_count(list) ; i ++) {
5569                 uint32_t * puid;
5570
5571                 puid = carray_get(list, i);
5572                 result = g_slist_prepend(result, GINT_TO_POINTER(* puid));
5573         }
5574         result = g_slist_reverse(result);
5575         return result;
5576 }
5577
5578 static void imap_flags_hash_from_lep_uid_flags_tab(carray * list,
5579                                                    GHashTable * hash,
5580                                                    GHashTable * tags_hash)
5581 {
5582         unsigned int i;
5583
5584         for(i = 0 ; i < carray_count(list) ; i += 3) {
5585                 uint32_t * puid;
5586                 int * pflags;
5587                 GSList *tags;
5588
5589                 puid = carray_get(list, i);
5590                 pflags = carray_get(list, i + 1);
5591                 tags = carray_get(list, i + 2);
5592
5593                 g_hash_table_insert(hash, GINT_TO_POINTER(*puid), GINT_TO_POINTER(* pflags));
5594                 g_hash_table_insert(tags_hash, GINT_TO_POINTER(*puid), tags);
5595         }
5596 }
5597
5598 static MsgInfo *imap_envelope_from_lep(struct imap_fetch_env_info * info,
5599                                        FolderItem *item)
5600 {
5601         MsgInfo *msginfo = NULL;
5602         guint32 uid = 0;
5603         goffset size = 0;
5604         MsgFlags flags = {0, 0};
5605
5606         if (info->headers == NULL)
5607                 return NULL;
5608
5609         MSG_SET_TMP_FLAGS(flags, MSG_IMAP);
5610         if (folder_has_parent_of_type(item, F_QUEUE)) {
5611                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
5612         } else if (folder_has_parent_of_type(item, F_DRAFT)) {
5613                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
5614         }
5615         flags.perm_flags = info->flags;
5616
5617         uid = info->uid;
5618         size = (goffset) info->size;
5619         msginfo = procheader_parse_str(info->headers, flags, FALSE, FALSE);
5620
5621         if (msginfo) {
5622                 msginfo->msgnum = uid;
5623                 msginfo->size = size;
5624         }
5625
5626         return msginfo;
5627 }
5628
5629 static void imap_lep_set_free(GSList *seq_list)
5630 {
5631         GSList * cur;
5632
5633         for(cur = seq_list ; cur != NULL ; cur = g_slist_next(cur)) {
5634                 struct mailimap_set * imapset;
5635
5636                 imapset = cur->data;
5637                 mailimap_set_free(imapset);
5638         }
5639         g_slist_free(seq_list);
5640 }
5641
5642 static struct mailimap_flag_list * imap_flag_to_lep(IMAPFolderItem *item, IMAPFlags flags, GSList *tags)
5643 {
5644         struct mailimap_flag_list * flag_list;
5645         GSList *cur = tags;
5646
5647         flag_list = mailimap_flag_list_new_empty();
5648
5649         if (IMAP_IS_SEEN(flags))
5650                 mailimap_flag_list_add(flag_list,
5651                                        mailimap_flag_new_seen());
5652         if (IMAP_IS_ANSWERED(flags))
5653                 mailimap_flag_list_add(flag_list,
5654                                        mailimap_flag_new_answered());
5655         if (IMAP_IS_FLAGGED(flags))
5656                 mailimap_flag_list_add(flag_list,
5657                                        mailimap_flag_new_flagged());
5658         if (IMAP_IS_DELETED(flags))
5659                 mailimap_flag_list_add(flag_list,
5660                                        mailimap_flag_new_deleted());
5661         if (IMAP_IS_DRAFT(flags))
5662                 mailimap_flag_list_add(flag_list,
5663                                        mailimap_flag_new_draft());
5664         if (IMAP_IS_FORWARDED(flags) && flag_ok(item, IMAP_FLAG_FORWARDED))
5665                 mailimap_flag_list_add(flag_list,
5666                                        mailimap_flag_new_flag_keyword(strdup(RTAG_FORWARDED)));
5667         if (IMAP_IS_SPAM(flags) && flag_ok(item, IMAP_FLAG_SPAM))
5668                 mailimap_flag_list_add(flag_list,
5669                                        mailimap_flag_new_flag_keyword(strdup(RTAG_JUNK)));
5670         else if (IMAP_IS_HAM(flags) && flag_ok(item, IMAP_FLAG_HAM))
5671                 mailimap_flag_list_add(flag_list,
5672                                        mailimap_flag_new_flag_keyword(strdup(RTAG_NON_JUNK)));
5673
5674         for (; cur; cur = cur->next) {
5675                 gchar *enc_str =
5676                         imap_utf8_to_modified_utf7(cur->data, TRUE);
5677                 g_strstrip(enc_str);
5678
5679                 mailimap_flag_list_add(flag_list,
5680                         mailimap_flag_new_flag_keyword(enc_str));
5681         }
5682
5683         return flag_list;
5684 }
5685
5686 guint imap_folder_get_refcnt(Folder *folder)
5687 {
5688         return ((IMAPFolder *)folder)->refcnt;
5689 }
5690
5691 void imap_folder_ref(Folder *folder)
5692 {
5693         ((IMAPFolder *)folder)->refcnt++;
5694 }
5695
5696 void imap_disconnect_all(gboolean have_connectivity)
5697 {
5698         GList *list;
5699         gboolean short_timeout;
5700 #ifdef HAVE_NETWORKMANAGER_SUPPORT
5701         GError *error;
5702 #endif
5703
5704 #ifdef HAVE_NETWORKMANAGER_SUPPORT
5705         error = NULL;
5706         short_timeout = !networkmanager_is_online(&error);
5707         if(error) {
5708                 short_timeout = TRUE;
5709                 g_error_free(error);
5710         }
5711 #else
5712         short_timeout = TRUE;
5713 #endif
5714
5715         if(short_timeout)
5716                 imap_main_set_timeout(1);
5717
5718         for (list = account_get_list(); list != NULL; list = list->next) {
5719                 PrefsAccount *account = list->data;
5720                 if (account->protocol == A_IMAP4) {
5721                         RemoteFolder *folder = (RemoteFolder *)account->folder;
5722                         if (folder && folder->session) {
5723                                 IMAPSession *session = (IMAPSession *)folder->session;
5724                                 if (have_connectivity)
5725                                         imap_threaded_disconnect(FOLDER(folder));
5726                                 SESSION(session)->state = SESSION_DISCONNECTED;
5727                                 SESSION(session)->sock = NULL;
5728                                 session_destroy(SESSION(session));
5729                                 folder->session = NULL;
5730                         }
5731                 }
5732         }
5733
5734         if(short_timeout)
5735                 imap_main_set_timeout(prefs_common.io_timeout_secs);
5736 }
5737
5738 void imap_folder_unref(Folder *folder)
5739 {
5740         if (((IMAPFolder *)folder)->refcnt > 0)
5741                 ((IMAPFolder *)folder)->refcnt--;
5742 }
5743
5744 void imap_cancel_all(void)
5745 {
5746         GList *folderlist;
5747         GList *cur;
5748
5749         folderlist = folder_get_list();
5750         for (cur = folderlist; cur != NULL; cur = g_list_next(cur)) {
5751                 Folder *folder = (Folder *) cur->data;
5752
5753                 if (folder->klass == &imap_class) {
5754                         if (imap_is_busy(folder)) {
5755                                 IMAPSession *imap_session;
5756                                 RemoteFolder *rfolder;
5757
5758                                 g_printerr("cancelled\n");
5759                                 imap_threaded_cancel(folder);
5760                                 rfolder = (RemoteFolder *) folder;
5761                                 imap_session = (IMAPSession *) rfolder->session;
5762                                 if (imap_session)
5763                                         imap_session->cancelled = 1;
5764                         }
5765                 }
5766         }
5767 }
5768
5769 gboolean imap_cancel_all_enabled(void)
5770 {
5771         GList *folderlist;
5772         GList *cur;
5773
5774         folderlist = folder_get_list();
5775         for (cur = folderlist; cur != NULL; cur = g_list_next(cur)) {
5776                 Folder *folder = (Folder *) cur->data;
5777
5778                 if (folder->klass == &imap_class) {
5779                         if (imap_is_busy(folder)) {
5780                                 return TRUE;
5781                         }
5782                 }
5783         }
5784
5785         return FALSE;
5786 }
5787
5788 static gboolean imap_is_busy(Folder *folder)
5789 {
5790         IMAPSession *imap_session;
5791         RemoteFolder *rfolder;
5792
5793         rfolder = (RemoteFolder *) folder;
5794         imap_session = (IMAPSession *) rfolder->session;
5795         if (imap_session == NULL)
5796                 return FALSE;
5797
5798         return imap_session->busy;
5799 }
5800
5801 #else /* HAVE_LIBETPAN */
5802
5803 static FolderClass imap_class;
5804
5805 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item);
5806 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag);
5807
5808 static Folder   *imap_folder_new        (const gchar    *name,
5809                                          const gchar    *path)
5810 {
5811         static gboolean missing_imap_warning = TRUE;
5812         if (missing_imap_warning) {
5813                 missing_imap_warning = FALSE;
5814                 alertpanel_error(
5815                         _("You have one or more IMAP accounts "
5816                           "defined. However this version of "
5817                           "Claws Mail has been built without "
5818                           "IMAP support; your IMAP account(s) are "
5819                           "disabled.\n\n"
5820                           "You probably need to "
5821                           "install libetpan and recompile "
5822                           "Claws Mail."));
5823         }
5824         return NULL;
5825 }
5826 static gint     imap_create_tree        (Folder         *folder)
5827 {
5828         return -1;
5829 }
5830 static FolderItem *imap_create_folder   (Folder         *folder,
5831                                          FolderItem     *parent,
5832                                          const gchar    *name)
5833 {
5834         return NULL;
5835 }
5836 static gint     imap_rename_folder      (Folder         *folder,
5837                                          FolderItem     *item,
5838                                          const gchar    *name)
5839 {
5840         return -1;
5841 }
5842
5843 gchar imap_get_path_separator_for_item(FolderItem *item)
5844 {
5845         return '/';
5846 }
5847
5848 FolderClass *imap_get_class(void)
5849 {
5850         if (imap_class.idstr == NULL) {
5851                 imap_class.type = F_IMAP;
5852                 imap_class.idstr = "imap";
5853                 imap_class.uistr = "IMAP4";
5854
5855                 imap_class.new_folder = imap_folder_new;
5856                 imap_class.create_tree = imap_create_tree;
5857                 imap_class.create_folder = imap_create_folder;
5858                 imap_class.rename_folder = imap_rename_folder;
5859
5860                 imap_class.set_xml = folder_set_xml;
5861                 imap_class.get_xml = folder_get_xml;
5862                 imap_class.item_set_xml = imap_item_set_xml;
5863                 imap_class.item_get_xml = imap_item_get_xml;
5864                 /* nothing implemented */
5865         }
5866
5867         return &imap_class;
5868 }
5869
5870 void imap_disconnect_all(gboolean have_connectivity)
5871 {
5872 }
5873
5874 gint imap_subscribe(Folder *folder, FolderItem *item, gchar *rpath, gboolean sub)
5875 {
5876         return -1;
5877 }
5878
5879 GList * imap_scan_subtree(Folder *folder, FolderItem *item, gboolean unsubs_only, gboolean recursive)
5880 {
5881         return NULL;
5882 }
5883
5884 void imap_cache_msg(FolderItem *item, gint msgnum)
5885 {
5886 }
5887
5888 void imap_cancel_all(void)
5889 {
5890 }
5891
5892 gboolean imap_cancel_all_enabled(void)
5893 {
5894         return FALSE;
5895 }
5896
5897 #endif
5898
5899 #ifdef HAVE_LIBETPAN
5900 static void imap_synchronise(FolderItem *item, gint days)
5901 {
5902         if (IMAP_FOLDER_ITEM(item)->last_sync == IMAP_FOLDER_ITEM(item)->last_change) {
5903                 debug_print("%s already synced\n", item->path?item->path:item->name);
5904                 return;
5905         }
5906         debug_print("syncing %s\n", item->path?item->path:item->name);
5907         imap_gtk_synchronise(item, days);
5908         IMAP_FOLDER_ITEM(item)->last_sync = IMAP_FOLDER_ITEM(item)->last_change;
5909 }
5910 #endif
5911
5912 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag)
5913 {
5914 #ifdef HAVE_LIBETPAN
5915         GList *cur;
5916 #endif
5917         folder_item_set_xml(folder, item, tag);
5918
5919 #ifdef HAVE_LIBETPAN
5920         for (cur = tag->attr; cur != NULL; cur = g_list_next(cur)) {
5921                 XMLAttr *attr = (XMLAttr *) cur->data;
5922
5923                 if (!attr || !attr->name || !attr->value) continue;
5924                 if (!strcmp(attr->name, "uidnext"))
5925                         IMAP_FOLDER_ITEM(item)->uid_next = atoi(attr->value);
5926                 if (!strcmp(attr->name, "last_sync"))
5927                         IMAP_FOLDER_ITEM(item)->last_sync = atoi(attr->value);
5928                 if (!strcmp(attr->name, "last_change"))
5929                         IMAP_FOLDER_ITEM(item)->last_change = atoi(attr->value);
5930         }
5931         if (IMAP_FOLDER_ITEM(item)->last_change == 0)
5932                 IMAP_FOLDER_ITEM(item)->last_change = time(NULL);
5933 #endif
5934 }
5935
5936 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item)
5937 {
5938         XMLTag *tag;
5939
5940         tag = folder_item_get_xml(folder, item);
5941
5942 #ifdef HAVE_LIBETPAN
5943         xml_tag_add_attr(tag, xml_attr_new_int("uidnext",
5944                         IMAP_FOLDER_ITEM(item)->uid_next));
5945         xml_tag_add_attr(tag, xml_attr_new_int("last_sync",
5946                         IMAP_FOLDER_ITEM(item)->last_sync));
5947         xml_tag_add_attr(tag, xml_attr_new_int("last_change",
5948                         IMAP_FOLDER_ITEM(item)->last_change));
5949
5950 #endif
5951         return tag;
5952 }
5953
5954 /* ===================================================================
5955  * UTF-7 conversion routines as in RFC 2192
5956  * ===================================================================
5957  * These two functions from:
5958  * libimap library.
5959  * Copyright (C) 2003-2004 Pawel Salek. */
5960
5961 /* UTF7 modified base64 alphabet */
5962 static char base64chars[] =
5963   "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+,";
5964 #define UNDEFINED 64
5965
5966 /* UTF16 definitions */
5967 #define UTF16MASK       0x03FFUL
5968 #define UTF16SHIFT      10
5969 #define UTF16BASE       0x10000UL
5970 #define UTF16HIGHSTART  0xD800UL
5971 #define UTF16HIGHEND    0xDBFFUL
5972 #define UTF16LOSTART    0xDC00UL
5973 #define UTF16LOEND      0xDFFFUL
5974
5975
5976 /* Convert an IMAP mailbox to a UTF-8 string.
5977  *  dst needs to have roughly 4 times the storage space of src
5978  *    Hex encoding can triple the size of the input
5979  *    UTF-7 can be slightly denser than UTF-8
5980  *     (worst case: 8 octets UTF-7 becomes 9 octets UTF-8)
5981  */
5982 char* imap_modified_utf7_to_utf8(const char *mbox, gboolean change_spaces)
5983 {
5984   unsigned c, i, bitcount;
5985   unsigned long ucs4, utf16, bitbuf;
5986   unsigned char base64[256];
5987   const char *src;
5988   char *dst, *res  = g_malloc(2*strlen(mbox)+1);
5989
5990   dst = res;
5991   src = mbox;
5992   if(!dst) return NULL;
5993   /* initialize modified base64 decoding table */
5994   memset(base64, UNDEFINED, sizeof (base64));
5995   for (i = 0; i < sizeof (base64chars); ++i) {
5996     base64[(unsigned)base64chars[i]] = i;
5997   }
5998
5999   /* loop until end of string */
6000   while (*src != '\0') {
6001     c = *src++;
6002     /* deal with literal characters and &- */
6003     if (c != '&' || *src == '-') {
6004       /* encode literally */
6005       if (change_spaces && c == '_')
6006         *dst++ = ' ';
6007       else
6008         *dst++ = c;
6009       /* skip over the '-' if this is an &- sequence */
6010       if (c == '&') ++src;
6011     } else {
6012       /* convert modified UTF-7 -> UTF-16 -> UCS-4 -> UTF-8 -> HEX */
6013       bitbuf = 0;
6014       bitcount = 0;
6015       ucs4 = 0;
6016       while ((c = base64[(unsigned char) *src]) != UNDEFINED) {
6017         ++src;
6018         bitbuf = (bitbuf << 6) | c;
6019         bitcount += 6;
6020         /* enough bits for a UTF-16 character? */
6021         if (bitcount >= 16) {
6022           bitcount -= 16;
6023           utf16 = (bitcount ? bitbuf >> bitcount
6024                    : bitbuf) & 0xffff;
6025           /* convert UTF16 to UCS4 */
6026           if
6027             (utf16 >= UTF16HIGHSTART && utf16 <= UTF16HIGHEND) {
6028             ucs4 = (utf16 - UTF16HIGHSTART) << UTF16SHIFT;
6029             continue;
6030           } else if
6031             (utf16 >= UTF16LOSTART && utf16 <= UTF16LOEND) {
6032             ucs4 += utf16 - UTF16LOSTART + UTF16BASE;
6033           } else {
6034             ucs4 = utf16;
6035           }
6036
6037           /* convert UTF-16 range of UCS4 to UTF-8 */
6038           if (ucs4 <= 0x7fUL) {
6039             dst[0] = ucs4;
6040             dst += 1;
6041           } else if (ucs4 <= 0x7ffUL) {
6042             dst[0] = 0xc0 | (ucs4 >> 6);
6043             dst[1] = 0x80 | (ucs4 & 0x3f);
6044             dst += 2;
6045           } else if (ucs4 <= 0xffffUL) {
6046             dst[0] = 0xe0 | (ucs4 >> 12);
6047             dst[1] = 0x80 | ((ucs4 >> 6) & 0x3f);
6048             dst[2] = 0x80 | (ucs4 & 0x3f);
6049             dst += 3;
6050           } else {
6051             dst[0] = 0xf0 | (ucs4 >> 18);
6052             dst[1] = 0x80 | ((ucs4 >> 12) & 0x3f);
6053             dst[2] = 0x80 | ((ucs4 >> 6) & 0x3f);
6054             dst[3] = 0x80 | (ucs4 & 0x3f);
6055             dst += 4;
6056           }
6057         }
6058       }
6059       /* skip over trailing '-' in modified UTF-7 encoding */
6060       if (*src == '-') ++src;
6061     }
6062   }
6063   /* terminate destination string */
6064   *dst = '\0';
6065   return res;
6066 }
6067
6068 /* Convert hex coded UTF-8 string to modified UTF-7 IMAP mailbox
6069  *  dst should be about twice the length of src to deal with non-hex
6070  *  coded URLs
6071  */
6072 char* imap_utf8_to_modified_utf7(const char *src, gboolean change_spaces)
6073 {
6074   unsigned int utf8pos, utf8total, c, utf7mode, bitstogo, utf16flag;
6075   unsigned long ucs4 = 0, bitbuf = 0;
6076
6077   /* initialize hex lookup table */
6078   char *dst, *res;
6079
6080   if (!src) return NULL;
6081
6082   res = malloc(2*strlen(src)+1);
6083   dst = res;
6084   if(!dst) return NULL;
6085
6086   utf7mode = 0;
6087   utf8total = 0;
6088   bitstogo = 0;
6089   utf8pos = 0;
6090   while ((c = (unsigned char)*src) != '\0') {
6091     ++src;
6092     /* normal character? */
6093     if (c >= ' ' && c <= '~' && (c != '_' || !change_spaces)) {
6094       /* switch out of UTF-7 mode */
6095       if (utf7mode) {
6096         if (bitstogo) {
6097           *dst++ = base64chars[(bitbuf << (6 - bitstogo)) & 0x3F];
6098         }
6099         *dst++ = '-';
6100         utf7mode = 0;
6101         utf8pos  = 0;
6102         bitstogo = 0;
6103         utf8total= 0;
6104       }
6105       if (change_spaces && c == ' ')
6106         *dst++ = '_';
6107       else
6108         *dst++ = c;
6109       /* encode '&' as '&-' */
6110       if (c == '&') {
6111         *dst++ = '-';
6112       }
6113       continue;
6114     }
6115     /* switch to UTF-7 mode */
6116     if (!utf7mode) {
6117       *dst++ = '&';
6118       utf7mode = 1;
6119     }
6120     /* Encode US-ASCII characters as themselves */
6121     if (c < 0x80) {
6122       ucs4 = c;
6123     } else if (utf8total) {
6124       /* save UTF8 bits into UCS4 */
6125       ucs4 = (ucs4 << 6) | (c & 0x3FUL);
6126       if (++utf8pos < utf8total) {
6127         continue;
6128       }
6129     } else {
6130       utf8pos = 1;
6131       if (c < 0xE0) {
6132         utf8total = 2;
6133         ucs4 = c & 0x1F;
6134       } else if (c < 0xF0) {
6135         utf8total = 3;
6136         ucs4 = c & 0x0F;
6137       } else {
6138         /* NOTE: can't convert UTF8 sequences longer than 4 */
6139         utf8total = 4;
6140         ucs4 = c & 0x03;
6141       }
6142       continue;
6143     }
6144     /* loop to split ucs4 into two utf16 chars if necessary */
6145     utf8total = 0;
6146     do {
6147       if (ucs4 >= UTF16BASE) {
6148         ucs4 -= UTF16BASE;
6149         bitbuf = (bitbuf << 16) | ((ucs4 >> UTF16SHIFT)
6150                                    + UTF16HIGHSTART);
6151         ucs4 = (ucs4 & UTF16MASK) + UTF16LOSTART;
6152         utf16flag = 1;
6153       } else {
6154         bitbuf = (bitbuf << 16) | ucs4;
6155         utf16flag = 0;
6156       }
6157       bitstogo += 16;
6158       /* spew out base64 */
6159       while (bitstogo >= 6) {
6160         bitstogo -= 6;
6161         *dst++ = base64chars[(bitstogo ? (bitbuf >> bitstogo)
6162                               : bitbuf)
6163                              & 0x3F];
6164       }
6165     } while (utf16flag);
6166   }
6167   /* if in UTF-7 mode, finish in ASCII */
6168   if (utf7mode) {
6169     if (bitstogo) {
6170       *dst++ = base64chars[(bitbuf << (6 - bitstogo)) & 0x3F];
6171     }
6172     *dst++ = '-';
6173   }
6174   /* tie off string */
6175   *dst = '\0';
6176   return res;
6177 }