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_full(list_set);
1383                         if (ok != MAILIMAP_NO_ERROR) {
1384                                 return;
1385                         }
1386                 }
1387
1388                 for (cur = tags_unset; cur; cur = cur->next) {
1389                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1390                         const gchar *str = tags_get_tag(cur_tag);
1391                         if (IS_NOT_RESERVED_TAG(str))
1392                                 list_unset = g_slist_prepend(list_unset, g_strdup(str));
1393                 }
1394                 if (list_unset) {
1395                         ok = imap_set_message_flags(session,
1396                                 IMAP_FOLDER_ITEM(item), &numlist, 0, list_unset, FALSE);
1397                         slist_free_strings_full(list_unset);
1398                         if (ok != MAILIMAP_NO_ERROR) {
1399                                 return;
1400                         }
1401                 }
1402         }
1403 }
1404
1405 static gchar *imap_fetch_msg_full(Folder *folder, FolderItem *item, gint uid,
1406                                   gboolean headers, gboolean body)
1407 {
1408         gchar *path, *filename;
1409         IMAPSession *session;
1410         gint ok;
1411
1412         g_return_val_if_fail(folder != NULL, NULL);
1413         g_return_val_if_fail(item != NULL, NULL);
1414
1415         if (uid == 0)
1416                 return NULL;
1417
1418         path = folder_item_get_path(item);
1419         if (!is_dir_exist(path))
1420                 make_dir_hier(path);
1421         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(uid), NULL);
1422         g_free(path);
1423         debug_print("trying to fetch cached %s\n", filename);
1424         if (is_file_exist(filename)) {
1425                 /* see whether the local file represents the whole message
1426                  * or not. As the IMAP server reports size with \r chars,
1427                  * we have to update the local file (UNIX \n only) size */
1428                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1429                 guint have_size = -1;
1430
1431                 if (cached)
1432                         debug_print("message %d has been already %scached.\n", uid,
1433                                 MSG_IS_FULLY_CACHED(cached->flags) ? "fully ":"");
1434
1435                 if (!cached || !MSG_IS_FULLY_CACHED(cached->flags)) {
1436                         have_size = get_file_size_with_crs(filename);
1437                         if (cached && (cached->size <= have_size || !body)) {
1438                                 procmsg_msginfo_free(cached);
1439                                 ok = file_strip_crs(filename);
1440                                 if (ok == 0 && cached && cached->size <= have_size) {
1441                                         /* we have it all and stripped */
1442                                         debug_print("...fully cached in fact; setting flag.\n");
1443                                         procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1444                                 }
1445                                 return filename;
1446                         } else if (!cached && time(NULL) - get_file_mtime(filename) < 60) {
1447                                 debug_print("message not cached and file recent, considering file complete\n");
1448                                 ok = file_strip_crs(filename);
1449                                 if (ok == 0)
1450                                         return filename;
1451                         } else {
1452                                 procmsg_msginfo_free(cached);
1453                         }
1454                 }
1455                 if (cached && MSG_IS_FULLY_CACHED(cached->flags)) {
1456                         procmsg_msginfo_free(cached);
1457                         return filename;
1458                 }
1459         } else {
1460                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1461                 if (cached) {
1462                         procmsg_msginfo_unset_flags(cached, MSG_FULLY_CACHED, 0);
1463                         procmsg_msginfo_free(cached);
1464                 }
1465         }
1466
1467         debug_print("getting session...\n");
1468         session = imap_session_get(folder);
1469
1470         if (!session) {
1471                 g_free(filename);
1472                 return NULL;
1473         }
1474         session_set_access_time(SESSION(session));
1475         lock_session(session); /* unlocked later in the function */
1476
1477         debug_print("IMAP fetching messages\n");
1478         ok = imap_select(session, IMAP_FOLDER(folder), item,
1479                          NULL, NULL, NULL, NULL, NULL, FALSE);
1480         if (ok != MAILIMAP_NO_ERROR) {
1481                 g_warning("can't select mailbox %s\n", item->path);
1482                 g_free(filename);
1483                 return NULL;
1484         }
1485
1486         session_set_access_time(SESSION(session));
1487
1488         debug_print("getting message %d...\n", uid);
1489         ok = imap_cmd_fetch(session, (guint32)uid, filename, headers, body);
1490
1491         if (ok != MAILIMAP_NO_ERROR) {
1492                 g_warning("can't fetch message %d\n", uid);
1493                 g_free(filename);
1494                 return NULL;
1495         }
1496
1497         session_set_access_time(SESSION(session));
1498         unlock_session(session);
1499
1500         ok = file_strip_crs(filename);
1501
1502         if (ok == 0 && headers && body) {
1503                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1504                 if (cached) {
1505                         procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1506                         procmsg_msginfo_free(cached);
1507                 }
1508         } else if (ok == -1) {
1509                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1510                 if (cached) {
1511                         procmsg_msginfo_unset_flags(cached, MSG_FULLY_CACHED, 0);
1512                         procmsg_msginfo_free(cached);
1513                 }
1514         }
1515         return filename;
1516 }
1517
1518 static gboolean imap_is_msg_fully_cached(Folder *folder, FolderItem *item, gint uid)
1519 {
1520         gchar *path, *filename;
1521         guint size = 0;
1522         MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1523
1524         if (!cached)
1525                 return FALSE;
1526
1527         if (MSG_IS_FULLY_CACHED(cached->flags)) {
1528                 procmsg_msginfo_free(cached);
1529                 return TRUE;
1530         }
1531         path = folder_item_get_path(item);
1532         if (!is_dir_exist(path))
1533                 return FALSE;
1534
1535         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(uid), NULL);
1536         g_free(path);
1537         if (is_file_exist(filename)) {
1538                 if (cached && cached->total_size == cached->size) {
1539                         /* fast path */
1540                         g_free(filename);
1541                         procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1542                         return TRUE;
1543                 }
1544                 size = get_file_size_with_crs(filename);
1545                 g_free(filename);
1546         }
1547         if (cached && size >= cached->size) {
1548                 cached->total_size = cached->size;
1549                 procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1550                 procmsg_msginfo_free(cached);
1551                 return TRUE;
1552         }
1553         if (cached)
1554                 procmsg_msginfo_free(cached);
1555         return FALSE;
1556 }
1557
1558 void imap_cache_msg(FolderItem *item, gint msgnum)
1559 {
1560         Folder *folder = NULL;
1561
1562         if (!item)
1563                 return;
1564         folder = item->folder;
1565
1566         if (!imap_is_msg_fully_cached(folder, item, msgnum)) {
1567                 gchar *tmp = imap_fetch_msg_full(folder, item, msgnum, TRUE, TRUE);
1568                 debug_print("fetched %s\n", tmp);
1569                 g_free(tmp);
1570         }
1571 }
1572
1573 static gint imap_add_msg(Folder *folder, FolderItem *dest,
1574                          const gchar *file, MsgFlags *flags)
1575 {
1576         gint ret;
1577         GSList file_list;
1578         MsgFileInfo fileinfo;
1579
1580         g_return_val_if_fail(file != NULL, -1);
1581
1582         fileinfo.msginfo = NULL;
1583         fileinfo.file = (gchar *)file;
1584         fileinfo.flags = flags;
1585         file_list.data = &fileinfo;
1586         file_list.next = NULL;
1587
1588         ret = imap_add_msgs(folder, dest, &file_list, NULL);
1589         return ret;
1590 }
1591
1592 static gint imap_add_msgs(Folder *folder, FolderItem *dest, GSList *file_list,
1593                    GHashTable *relation)
1594 {
1595         gchar *destdir;
1596         IMAPSession *session;
1597         guint32 last_uid = 0;
1598         GSList *cur;
1599         MsgFileInfo *fileinfo;
1600         gint ok = MAILIMAP_NO_ERROR;
1601         gint curnum = 0, total = 0;
1602         gboolean missing_uids = FALSE;
1603
1604         g_return_val_if_fail(folder != NULL, -1);
1605         g_return_val_if_fail(dest != NULL, -1);
1606         g_return_val_if_fail(file_list != NULL, -1);
1607
1608         debug_print("getting session...\n");
1609         session = imap_session_get(folder);
1610         if (!session) {
1611                 return -1;
1612         }
1613         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
1614         if (is_fatal(ok))
1615                 return -1;
1616         statusbar_print_all(_("Adding messages..."));
1617         total = g_slist_length(file_list);
1618         for (cur = file_list; cur != NULL; cur = cur->next) {
1619                 IMAPFlags iflags = 0;
1620                 guint32 new_uid = 0;
1621                 gchar *real_file = NULL;
1622                 fileinfo = (MsgFileInfo *)cur->data;
1623
1624                 statusbar_progress_all(curnum, total, total < 10 ? 1:10);
1625                 curnum++;
1626
1627                 if (fileinfo->flags) {
1628                         if (MSG_IS_MARKED(*fileinfo->flags))
1629                                 iflags |= IMAP_FLAG_FLAGGED;
1630                         if (MSG_IS_REPLIED(*fileinfo->flags))
1631                                 iflags |= IMAP_FLAG_ANSWERED;
1632                         if (MSG_IS_FORWARDED(*fileinfo->flags))
1633                                 iflags |= IMAP_FLAG_FORWARDED;
1634                         if (MSG_IS_SPAM(*fileinfo->flags))
1635                                 iflags |= IMAP_FLAG_SPAM;
1636                         else
1637                                 iflags |= IMAP_FLAG_HAM;
1638                         if (!MSG_IS_UNREAD(*fileinfo->flags))
1639                                 iflags |= IMAP_FLAG_SEEN;
1640
1641                 }
1642
1643                 if (real_file == NULL)
1644                         real_file = g_strdup(fileinfo->file);
1645
1646                 if (folder_has_parent_of_type(dest, F_QUEUE) ||
1647                     folder_has_parent_of_type(dest, F_OUTBOX) ||
1648                     folder_has_parent_of_type(dest, F_DRAFT) ||
1649                     folder_has_parent_of_type(dest, F_TRASH))
1650                         iflags |= IMAP_FLAG_SEEN;
1651
1652                 ok = imap_cmd_append(session, IMAP_FOLDER_ITEM(dest), destdir, real_file, iflags,
1653                                      &new_uid);
1654
1655                 if (ok != MAILIMAP_NO_ERROR) {
1656                         g_warning("can't append message %s\n", real_file);
1657                         g_free(real_file);
1658                         g_free(destdir);
1659                         statusbar_progress_all(0,0,0);
1660                         statusbar_pop_all();
1661                         return -1;
1662                 } else {
1663                         debug_print("appended new message as %d\n", new_uid);
1664                         /* put the local file in the imapcache, so that we don't
1665                          * have to fetch it back later. */
1666
1667                         if (new_uid == 0) {
1668                                 missing_uids = TRUE;
1669                                 debug_print("Missing UID (0)\n");
1670                         }
1671                         if (new_uid > 0) {
1672                                 gchar *cache_path = folder_item_get_path(dest);
1673                                 if (!is_dir_exist(cache_path))
1674                                         make_dir_hier(cache_path);
1675                                 if (is_dir_exist(cache_path)) {
1676                                         gchar *cache_file = g_strconcat(
1677                                                 cache_path, G_DIR_SEPARATOR_S,
1678                                                 itos(new_uid), NULL);
1679                                         copy_file(real_file, cache_file, TRUE);
1680                                         debug_print("got UID %d, copied to cache: %s\n", new_uid, cache_file);
1681                                         g_free(cache_file);
1682                                 }
1683                                 g_free(cache_path);
1684                         }
1685                 }
1686
1687                 if (relation != NULL)
1688                         g_hash_table_insert(relation, fileinfo->msginfo != NULL ?
1689                                           (gpointer) fileinfo->msginfo : (gpointer) fileinfo,
1690                                           GINT_TO_POINTER(new_uid));
1691                 if (last_uid < new_uid) {
1692                         last_uid = new_uid;
1693                 }
1694
1695                 g_free(real_file);
1696         }
1697
1698         statusbar_progress_all(0,0,0);
1699         statusbar_pop_all();
1700
1701
1702         g_free(destdir);
1703
1704         imap_scan_required(folder, dest);
1705
1706         session = imap_session_get(folder);
1707         if (!session) {
1708                 return -1;
1709         }
1710         if (missing_uids) {
1711                 gint a;
1712                 ok = imap_select(session, IMAP_FOLDER(folder), dest,
1713                          &a, NULL, NULL, NULL, NULL, FALSE);
1714         }
1715         return last_uid;
1716 }
1717
1718 static GSList *flatten_mailimap_set(struct mailimap_set * set)
1719 {
1720         GSList *result = NULL;
1721         clistiter *list;
1722         guint32 start, end, t;
1723         GSList *cur;
1724
1725         if (!set || !set->set_list)
1726                 return NULL;
1727
1728         for (list = clist_begin(set->set_list); list; list = clist_next(list)) {
1729                 struct mailimap_set_item *item = (struct mailimap_set_item *)clist_content(list);
1730                 start = item->set_first;
1731                 end = item->set_last;
1732                 if (start <= end) {
1733                         for (t = start; t <= end; t++) {
1734                                 result = g_slist_prepend(result, GINT_TO_POINTER(t));
1735                         }
1736                 }
1737         }
1738         result = g_slist_reverse(result);
1739         if (debug_get_mode()) {
1740                 debug_print("flat imap set: ");
1741                 for (cur = result; cur; cur = cur->next) {
1742                         debug_print("%d ", GPOINTER_TO_INT(cur->data));
1743                 }
1744                 debug_print("\n");
1745         }
1746
1747         return result;
1748 }
1749 static gint imap_do_copy_msgs(Folder *folder, FolderItem *dest,
1750                               MsgInfoList *msglist, GHashTable *relation)
1751 {
1752         FolderItem *src;
1753         gchar *destdir;
1754         GSList *seq_list, *cur;
1755         MsgInfo *msginfo;
1756         IMAPSession *session;
1757         gint ok = MAILIMAP_NO_ERROR;
1758         GHashTable *uid_hash;
1759         gint last_num = 0;
1760
1761         g_return_val_if_fail(folder != NULL, -1);
1762         g_return_val_if_fail(dest != NULL, -1);
1763         g_return_val_if_fail(msglist != NULL, -1);
1764
1765         debug_print("getting session...\n");
1766         session = imap_session_get(folder);
1767
1768         if (!session) {
1769                 return -1;
1770         }
1771
1772         msginfo = (MsgInfo *)msglist->data;
1773         src = msginfo->folder;
1774         if (src == dest) {
1775                 g_warning("the src folder is identical to the dest.\n");
1776                 return -1;
1777         }
1778
1779         if (src->folder != dest->folder) {
1780                 GSList *infolist = NULL, *cur;
1781                 int res = -1;
1782                 for (cur = msglist; cur; cur = cur->next) {
1783                         msginfo = (MsgInfo *)cur->data;
1784                         MsgFileInfo *fileinfo = g_new0(MsgFileInfo, 1);
1785                         fileinfo->file = procmsg_get_message_file(msginfo);
1786                         fileinfo->flags = &(msginfo->flags);
1787                         infolist = g_slist_prepend(infolist, fileinfo);
1788                 }
1789                 infolist = g_slist_reverse(infolist);
1790                 res = folder_item_add_msgs(dest, infolist, FALSE);
1791                 for (cur = infolist; cur; cur = cur->next) {
1792                         MsgFileInfo *info = (MsgFileInfo *)cur->data;
1793                         g_free(info->file);
1794                         g_free(info);
1795                 }
1796                 g_slist_free(infolist);
1797                 return res;
1798         }
1799
1800         lock_session(session); /* unlocked later in the function */
1801
1802         ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
1803                          NULL, NULL, NULL, NULL, NULL, FALSE);
1804         if (ok != MAILIMAP_NO_ERROR) {
1805                 return ok;
1806         }
1807
1808         unlock_session(session);
1809
1810         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
1811
1812         if (is_fatal(ok))
1813                 return ok;
1814
1815         seq_list = imap_get_lep_set_from_msglist(IMAP_FOLDER(folder), msglist);
1816         uid_hash = g_hash_table_new(g_direct_hash, g_direct_equal);
1817
1818         statusbar_print_all(_("Copying messages..."));
1819         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
1820                 struct mailimap_set * seq_set;
1821                 struct mailimap_set * source = NULL;
1822                 struct mailimap_set * dest = NULL;
1823                 seq_set = cur->data;
1824
1825                 debug_print("Copying messages from %s to %s ...\n",
1826                             src->path, destdir);
1827
1828                 lock_session(session); /* unlocked later in the function */
1829                 ok = imap_cmd_copy(session, seq_set, destdir,
1830                         &source, &dest);
1831
1832                 if (is_fatal(ok)) {
1833                         session = NULL;
1834                 }
1835
1836                 if (ok == MAILIMAP_NO_ERROR) {
1837                         unlock_session(session);
1838                         if (relation && source && dest) {
1839                                 GSList *s_list = flatten_mailimap_set(source);
1840                                 GSList *d_list = flatten_mailimap_set(dest);
1841                                 GSList *s_cur, *d_cur;
1842                                 if (g_slist_length(s_list) == g_slist_length(d_list)) {
1843
1844                                         for (s_cur = s_list, d_cur = d_list;
1845                                              s_cur && d_cur;
1846                                              s_cur = s_cur->next, d_cur = d_cur->next) {
1847                                                 g_hash_table_insert(uid_hash, s_cur->data, d_cur->data);
1848                                         }
1849
1850                                 } else {
1851                                         debug_print("hhhmm, source list length != dest list length.\n");
1852                                 }
1853                                 g_slist_free(s_list);
1854                                 g_slist_free(d_list);
1855                         }
1856                 }
1857
1858
1859                 if (source)
1860                         mailimap_set_free(source);
1861                 if (dest)
1862                         mailimap_set_free(dest);
1863
1864                 if (ok != MAILIMAP_NO_ERROR) {
1865                         g_hash_table_destroy(uid_hash);
1866                         imap_lep_set_free(seq_list);
1867                         statusbar_pop_all();
1868                         return -1;
1869                 }
1870         }
1871
1872         for (cur = msglist; cur != NULL; cur = g_slist_next(cur)) {
1873                 MsgInfo *msginfo = (MsgInfo *)cur->data;
1874                 gpointer hashval;
1875
1876                 hashval = g_hash_table_lookup(uid_hash, GINT_TO_POINTER(msginfo->msgnum));
1877
1878                 if (hashval != NULL) {
1879                         gint num = GPOINTER_TO_INT(hashval);
1880                         g_hash_table_insert(relation, msginfo,
1881                                           GINT_TO_POINTER(num));
1882                         if (num > last_num)
1883                                 last_num = num;
1884                         debug_print("copied message %d as %d\n", msginfo->msgnum, num);
1885                         /* put the local file in the imapcache, so that we don't
1886                          * have to fetch it back later. */
1887                         if (num > 0) {
1888                                 gchar *cache_path = folder_item_get_path(msginfo->folder);
1889                                 gchar *real_file = g_strconcat(
1890                                         cache_path, G_DIR_SEPARATOR_S,
1891                                         itos(msginfo->msgnum), NULL);
1892                                 gchar *cache_file = NULL;
1893                                 g_free(cache_path);
1894                                 cache_path = folder_item_get_path(dest);
1895                                 cache_file = g_strconcat(
1896                                         cache_path, G_DIR_SEPARATOR_S,
1897                                         itos(num), NULL);
1898                                 if (!is_dir_exist(cache_path))
1899                                         make_dir_hier(cache_path);
1900                                 if (is_file_exist(real_file) && is_dir_exist(cache_path)) {
1901                                         copy_file(real_file, cache_file, TRUE);
1902                                         debug_print("copied to cache: %s\n", cache_file);
1903                                 }
1904                                 g_free(real_file);
1905                                 g_free(cache_file);
1906                                 g_free(cache_path);
1907                         }
1908                 } else
1909                         g_hash_table_insert(relation, msginfo,
1910                                           GINT_TO_POINTER(0));
1911         }
1912         statusbar_pop_all();
1913
1914         g_hash_table_destroy(uid_hash);
1915         imap_lep_set_free(seq_list);
1916
1917         g_free(destdir);
1918
1919         IMAP_FOLDER_ITEM(dest)->lastuid = 0;
1920         IMAP_FOLDER_ITEM(dest)->uid_next = 0;
1921         g_slist_free(IMAP_FOLDER_ITEM(dest)->uid_list);
1922         IMAP_FOLDER_ITEM(dest)->uid_list = NULL;
1923
1924         imap_scan_required(folder, dest);
1925         if (ok == MAILIMAP_NO_ERROR)
1926                 return last_num;
1927         else
1928                 return -1;
1929 }
1930
1931 static gint imap_copy_msg(Folder *folder, FolderItem *dest, MsgInfo *msginfo)
1932 {
1933         GSList msglist;
1934
1935         g_return_val_if_fail(msginfo != NULL, -1);
1936
1937         msglist.data = msginfo;
1938         msglist.next = NULL;
1939
1940         return imap_copy_msgs(folder, dest, &msglist, NULL);
1941 }
1942
1943 static gint imap_copy_msgs(Folder *folder, FolderItem *dest,
1944                     MsgInfoList *msglist, GHashTable *relation)
1945 {
1946         MsgInfo *msginfo;
1947         gint ret;
1948
1949         g_return_val_if_fail(folder != NULL, -1);
1950         g_return_val_if_fail(dest != NULL, -1);
1951         g_return_val_if_fail(msglist != NULL, -1);
1952
1953         msginfo = (MsgInfo *)msglist->data;
1954         g_return_val_if_fail(msginfo->folder != NULL, -1);
1955
1956         ret = imap_do_copy_msgs(folder, dest, msglist, relation);
1957         return ret;
1958 }
1959
1960
1961 static IMAPSearchKey* search_make_key(MatcherProp* match, gboolean* is_all)
1962 {
1963         if (match->matchtype == MATCHTYPE_MATCHCASE || match->matchtype == MATCHTYPE_MATCH) {
1964                 IMAPSearchKey* result = NULL;
1965                 gboolean invert = FALSE;
1966                 gint matchertype = match->criteria;
1967
1968                 if (is_all) {
1969                         *is_all = FALSE;
1970                 }
1971
1972                 switch (matchertype) {
1973                 case MATCHCRITERIA_NOT_NEW: invert = TRUE; matchertype = MATCHCRITERIA_NEW; break;
1974                 case MATCHCRITERIA_NOT_MARKED: invert = TRUE; matchertype = MATCHCRITERIA_MARKED; break;
1975                 case MATCHCRITERIA_NOT_FORWARDED: invert = TRUE; matchertype = MATCHCRITERIA_FORWARDED; break;
1976                 case MATCHCRITERIA_NOT_SPAM: invert = TRUE; matchertype = MATCHCRITERIA_SPAM; break;
1977                 case MATCHCRITERIA_NOT_SUBJECT: invert = TRUE; matchertype = MATCHCRITERIA_SUBJECT; break;
1978                 case MATCHCRITERIA_NOT_FROM: invert = TRUE; matchertype = MATCHCRITERIA_FROM; break;
1979                 case MATCHCRITERIA_NOT_TO: invert = TRUE; matchertype = MATCHCRITERIA_TO; break;
1980                 case MATCHCRITERIA_NOT_CC: invert = TRUE; matchertype = MATCHCRITERIA_CC; break;
1981                 case MATCHCRITERIA_NOT_REFERENCES: invert = TRUE; matchertype = MATCHCRITERIA_REFERENCES; break;
1982                 case MATCHCRITERIA_NOT_HEADER: invert = TRUE; matchertype = MATCHCRITERIA_HEADER; break;
1983                 case MATCHCRITERIA_NOT_TAG: invert = TRUE; matchertype = MATCHCRITERIA_TAG; break;
1984                 case MATCHCRITERIA_NOT_HEADERS_PART: invert = TRUE; matchertype = MATCHCRITERIA_HEADERS_PART; break;
1985                 case MATCHCRITERIA_NOT_MESSAGE: invert = TRUE; matchertype = MATCHCRITERIA_MESSAGE; break;
1986                 case MATCHCRITERIA_NOT_BODY_PART: invert = TRUE; matchertype = MATCHCRITERIA_BODY_PART; break;
1987                 case MATCHCRITERIA_NOT_TO_AND_NOT_CC: invert = TRUE; matchertype = MATCHCRITERIA_TO_OR_CC; break;
1988                 case MATCHCRITERIA_NOT_INREPLYTO: invert = TRUE; matchertype = MATCHCRITERIA_INREPLYTO; break;
1989                 }
1990
1991                 /*
1992                  * this aborts conversion even for predicates understood by the following code.
1993                  * while that might seem wasteful, claws local search for information listed below
1994                  * has proven faster than IMAP search plus network roundtrips. once this changes,
1995                  * consider removing these exceptions.
1996                  */
1997                 switch (matchertype) {
1998                 case MATCHCRITERIA_FROM:
1999                 case MATCHCRITERIA_TO:
2000                 case MATCHCRITERIA_CC:
2001                 case MATCHCRITERIA_TO_OR_CC:
2002                 case MATCHCRITERIA_SUBJECT:
2003                 case MATCHCRITERIA_REFERENCES:
2004                 case MATCHCRITERIA_INREPLYTO:
2005                 case MATCHCRITERIA_AGE_GREATER:
2006                 case MATCHCRITERIA_AGE_LOWER:
2007                 case MATCHCRITERIA_FORWARDED:
2008                 case MATCHCRITERIA_SPAM:
2009                 case MATCHCRITERIA_UNREAD:
2010                 case MATCHCRITERIA_NEW:
2011                 case MATCHCRITERIA_MARKED:
2012                 case MATCHCRITERIA_REPLIED:
2013                 case MATCHCRITERIA_DELETED:
2014                 case MATCHCRITERIA_SIZE_GREATER:
2015                 case MATCHCRITERIA_SIZE_SMALLER:
2016                 case MATCHCRITERIA_SIZE_EQUAL:
2017                         return NULL;
2018                 }
2019
2020                 /* the Message-ID header is also cached */
2021                 if (matchertype == MATCHCRITERIA_HEADER && g_strcmp0("Message-ID", match->header) == 0) {
2022                         return NULL;
2023                 }
2024
2025                 switch (matchertype) {
2026                 case MATCHCRITERIA_FORWARDED:
2027                         result = imap_search_new(IMAP_SEARCH_CRITERIA_TAG, NULL, RTAG_FORWARDED, 0);
2028                         break;
2029
2030                 case MATCHCRITERIA_SPAM:
2031                         result = imap_search_new(IMAP_SEARCH_CRITERIA_TAG, NULL, RTAG_JUNK, 0);
2032                         break;
2033
2034                 case MATCHCRITERIA_INREPLYTO:
2035                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, "In-Reply-To", match->expr, 0);
2036                         break;
2037
2038                 case MATCHCRITERIA_REFERENCES:
2039                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, "References", match->expr, 0);
2040                         break;
2041
2042                 case MATCHCRITERIA_TO_OR_CC:
2043                         result = imap_search_or(
2044                                         imap_search_new(IMAP_SEARCH_CRITERIA_TO, NULL, match->expr, 0),
2045                                         imap_search_new(IMAP_SEARCH_CRITERIA_CC, NULL, match->expr, 0)
2046                                         );
2047                         break;
2048
2049                 case MATCHCRITERIA_HEADERS_PART:
2050                         result = imap_search_and(
2051                                         imap_search_not(imap_search_new(IMAP_SEARCH_CRITERIA_BODY, NULL, match->expr, 0)),
2052                                         imap_search_new(IMAP_SEARCH_CRITERIA_MESSAGE, NULL, match->expr, 0)
2053                                         );
2054                         break;
2055
2056                 case MATCHCRITERIA_SIZE_EQUAL:
2057                         result = imap_search_and(
2058                                         imap_search_not(imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_SMALLER, NULL, NULL, match->value)),
2059                                         imap_search_not(imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_GREATER, NULL, NULL, match->value))
2060                                         );
2061                         break;
2062
2063                 case MATCHCRITERIA_NOT_UNREAD:
2064                         result = imap_search_new(IMAP_SEARCH_CRITERIA_READ, NULL, NULL, 0);
2065                         break;
2066
2067                 case MATCHCRITERIA_UNREAD:
2068                         result = imap_search_new(IMAP_SEARCH_CRITERIA_UNREAD, NULL, NULL, 0);
2069                         break;
2070
2071                 case MATCHCRITERIA_NEW:
2072                         result = imap_search_new(IMAP_SEARCH_CRITERIA_NEW, NULL, NULL, 0);
2073                         break;
2074
2075                 case MATCHCRITERIA_MARKED:
2076                         result = imap_search_new(IMAP_SEARCH_CRITERIA_MARKED, NULL, NULL, 0);
2077                         break;
2078
2079                 case MATCHCRITERIA_DELETED:
2080                         result = imap_search_new(IMAP_SEARCH_CRITERIA_DELETED, NULL, NULL, 0);
2081                         break;
2082
2083                 case MATCHCRITERIA_REPLIED:
2084                         result = imap_search_new(IMAP_SEARCH_CRITERIA_REPLIED, NULL, NULL, 0);
2085                         break;
2086
2087                 case MATCHCRITERIA_TAG:
2088                         {
2089                                 gchar *tmp = imap_utf8_to_modified_utf7(match->expr, TRUE);
2090                                 result = imap_search_new(IMAP_SEARCH_CRITERIA_TAG, NULL, tmp, 0);
2091                                 g_free(tmp);
2092                         }
2093                         break;
2094
2095                 case MATCHCRITERIA_SUBJECT:
2096                         result = imap_search_new(IMAP_SEARCH_CRITERIA_SUBJECT, NULL, match->expr, 0);
2097                         break;
2098
2099                 case MATCHCRITERIA_FROM:
2100                         result = imap_search_new(IMAP_SEARCH_CRITERIA_FROM, NULL, match->expr, 0);
2101                         break;
2102
2103                 case MATCHCRITERIA_TO:
2104                         result = imap_search_new(IMAP_SEARCH_CRITERIA_TO, NULL, match->expr, 0);
2105                         break;
2106
2107                 case MATCHCRITERIA_CC:
2108                         result = imap_search_new(IMAP_SEARCH_CRITERIA_CC, NULL, match->expr, 0);
2109                         break;
2110
2111                 case MATCHCRITERIA_AGE_GREATER:
2112                         result = imap_search_new(IMAP_SEARCH_CRITERIA_AGE_GREATER, NULL, NULL, match->value);
2113                         break;
2114
2115                 case MATCHCRITERIA_AGE_LOWER:
2116                         result = imap_search_new(IMAP_SEARCH_CRITERIA_AGE_LOWER, NULL, NULL, match->value);
2117                         break;
2118
2119                 case MATCHCRITERIA_BODY_PART:
2120                         result = imap_search_new(IMAP_SEARCH_CRITERIA_BODY, NULL, match->expr, 0);
2121                         break;
2122
2123                 case MATCHCRITERIA_MESSAGE:
2124                         result = imap_search_new(IMAP_SEARCH_CRITERIA_MESSAGE, NULL, match->expr, 0);
2125                         break;
2126
2127                 case MATCHCRITERIA_HEADER:
2128                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, match->header, match->expr, 0);
2129                         break;
2130
2131                 case MATCHCRITERIA_SIZE_GREATER:
2132                         result = imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_GREATER, NULL, NULL, match->value);
2133                         break;
2134
2135                 case MATCHCRITERIA_SIZE_SMALLER:
2136                         result = imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_SMALLER, NULL, NULL, match->value);
2137                         break;
2138
2139                 default:
2140                         result = imap_search_new(IMAP_SEARCH_CRITERIA_ALL, NULL, NULL, 0);
2141                         if (is_all) {
2142                                 *is_all = TRUE;
2143                         }
2144                         break;
2145                 }
2146
2147                 if (invert) {
2148                         result = imap_search_not(result);
2149                         if (is_all && *is_all) {
2150                                 *is_all = FALSE;
2151                         }
2152                 }
2153
2154                 return result;
2155         }
2156
2157         return NULL;
2158 }
2159
2160 static gint     search_msgs             (Folder                 *folder,
2161                                          FolderItem             *container,
2162                                          MsgNumberList          **msgs,
2163                                          gboolean               *on_server,
2164                                          MatcherList            *predicate,
2165                                          SearchProgressNotify   progress_cb,
2166                                          gpointer               progress_data)
2167 {
2168         IMAPSearchKey* key = NULL;
2169         GSList* cur;
2170         int result = -1;
2171         clist* uidlist = NULL;
2172         gboolean server_filtering_useless = FALSE;
2173         IMAPSession *session;
2174
2175         if (on_server == NULL || !*on_server) {
2176                 return folder_item_search_msgs_local(folder, container, msgs, on_server,
2177                                 predicate, progress_cb, progress_data);
2178         }
2179
2180         for (cur = predicate->matchers; cur != NULL; cur = cur->next) {
2181                 IMAPSearchKey* matcherPart = NULL;
2182                 MatcherProp* prop = (MatcherProp*) cur->data;
2183                 gboolean is_all;
2184
2185                 matcherPart = search_make_key(prop, &is_all);
2186
2187                 if (on_server) {
2188                         *on_server &= matcherPart != NULL && prop->matchtype == MATCHTYPE_MATCHCASE;
2189                 }
2190
2191                 if (matcherPart) {
2192                         if (key == NULL) {
2193                                 key = matcherPart;
2194                                 server_filtering_useless = is_all;
2195                         } else if (predicate->bool_and) {
2196                                 key = imap_search_and(key, matcherPart);
2197                                 server_filtering_useless &= is_all;
2198                         } else {
2199                                 key = imap_search_or(key, matcherPart);
2200                                 server_filtering_useless |= is_all;
2201                         }
2202                 }
2203         }
2204
2205         if (server_filtering_useless) {
2206                 imap_search_free(key);
2207                 key = NULL;
2208         }
2209
2210         if (key == NULL && progress_cb != NULL) {
2211                 GSList* cur;
2212                 GSList* list;
2213                 int count = 0;
2214
2215                 progress_cb(progress_data, TRUE, 0, 0, container->total_msgs);
2216                 progress_cb(progress_data, TRUE, container->total_msgs, 0, container->total_msgs);
2217
2218                 list = folder_item_get_msg_list(container);
2219                 for (cur = list; cur != NULL; cur = cur->next) {
2220                         *msgs = g_slist_prepend(*msgs, GUINT_TO_POINTER(((MsgInfo*) cur->data)->msgnum));
2221                         count++;
2222                 }
2223                 *msgs = g_slist_reverse(*msgs);
2224                 return count;
2225         }
2226
2227         session = imap_session_get(folder);
2228         if (!session) {
2229                 return -1;
2230         }
2231         result = imap_select(session, IMAP_FOLDER(folder), FOLDER_ITEM(container),
2232                          NULL, NULL, NULL, NULL, NULL, TRUE);
2233         if (result != MAILIMAP_NO_ERROR)
2234                 return -1;
2235
2236         if (progress_cb)
2237                 progress_cb(progress_data, TRUE, 0, 0, container->total_msgs);
2238         result = imap_threaded_search(folder, IMAP_SEARCH_TYPE_KEYED, key, NULL, &uidlist);
2239         if (progress_cb)
2240                 progress_cb(progress_data, TRUE, container->total_msgs, 0, container->total_msgs);
2241
2242         if (result == MAILIMAP_NO_ERROR) {
2243                 gint result = 0;
2244
2245                 *msgs = imap_uid_list_from_lep(uidlist, &result);
2246                 mailimap_search_result_free(uidlist);
2247
2248                 return result;
2249         } else {
2250                 return -1;
2251         }
2252 }
2253
2254
2255 static gint imap_do_remove_msgs(Folder *folder, FolderItem *dest,
2256                                 MsgInfoList *msglist, GHashTable *relation)
2257 {
2258         gchar *destdir, *dir;
2259         GSList *numlist = NULL, *cur;
2260         MsgInfo *msginfo;
2261         IMAPSession *session;
2262         gint ok = MAILIMAP_NO_ERROR;
2263
2264         g_return_val_if_fail(folder != NULL, -1);
2265         g_return_val_if_fail(dest != NULL, -1);
2266         g_return_val_if_fail(msglist != NULL, -1);
2267
2268         debug_print("getting session...\n");
2269         session = imap_session_get(folder);
2270         if (!session) {
2271                 return -1;
2272         }
2273
2274         lock_session(session); /* unlocked later in the function */
2275
2276         msginfo = (MsgInfo *)msglist->data;
2277
2278         ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
2279                          NULL, NULL, NULL, NULL, NULL, FALSE);
2280         if (ok != MAILIMAP_NO_ERROR) {
2281                 return ok;
2282         }
2283
2284         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
2285         if (is_fatal(ok)) {
2286                 g_free(destdir);
2287                 return ok;
2288         }
2289         for (cur = msglist; cur; cur = cur->next) {
2290                 msginfo = (MsgInfo *)cur->data;
2291                 if (!MSG_IS_DELETED(msginfo->flags))
2292                         numlist = g_slist_prepend(numlist, GINT_TO_POINTER(msginfo->msgnum));
2293         }
2294         numlist = g_slist_reverse(numlist);
2295
2296         if (numlist != NULL) {
2297                 ok = imap_set_message_flags
2298                         (session, IMAP_FOLDER_ITEM(msginfo->folder), numlist, IMAP_FLAG_DELETED, NULL, TRUE);
2299                 if (ok != MAILIMAP_NO_ERROR) {
2300                         log_warning(LOG_PROTOCOL, _("can't set deleted flags\n"));
2301                         g_free(destdir);
2302                         return ok;
2303                 }
2304         } /* else we just need to expunge */
2305         ok = imap_cmd_expunge(session, folder->account->imap_use_trash);
2306         if (ok != MAILIMAP_NO_ERROR) {
2307                 log_warning(LOG_PROTOCOL, _("can't expunge\n"));
2308                 g_free(destdir);
2309                 return ok;
2310         }
2311
2312         session->folder_content_changed = TRUE;
2313         unlock_session(session);
2314
2315         dir = folder_item_get_path(msginfo->folder);
2316         if (is_dir_exist(dir)) {
2317                 for (cur = msglist; cur; cur = cur->next) {
2318                         msginfo = (MsgInfo *)cur->data;
2319                         remove_numbered_files(dir, msginfo->msgnum, msginfo->msgnum);
2320                 }
2321         }
2322         g_free(dir);
2323
2324         g_slist_free(numlist);
2325
2326         imap_scan_required(folder, dest);
2327
2328         g_free(destdir);
2329         if (ok == MAILIMAP_NO_ERROR)
2330                 return 0;
2331         else
2332                 return -1;
2333 }
2334
2335 static gint imap_remove_msgs(Folder *folder, FolderItem *dest,
2336                     MsgInfoList *msglist, GHashTable *relation)
2337 {
2338         MsgInfo *msginfo;
2339
2340         g_return_val_if_fail(folder != NULL, -1);
2341         g_return_val_if_fail(dest != NULL, -1);
2342         if (msglist == NULL)
2343                 return 0;
2344
2345         msginfo = (MsgInfo *)msglist->data;
2346         g_return_val_if_fail(msginfo->folder != NULL, -1);
2347
2348         return imap_do_remove_msgs(folder, dest, msglist, relation);
2349 }
2350
2351 static gint imap_remove_all_msg(Folder *folder, FolderItem *item)
2352 {
2353         GSList *list = folder_item_get_msg_list(item);
2354         gint res = imap_remove_msgs(folder, item, list, NULL);
2355         procmsg_msg_list_free(list);
2356         return res;
2357 }
2358
2359 static gboolean imap_is_msg_changed(Folder *folder, FolderItem *item,
2360                                     MsgInfo *msginfo)
2361 {
2362         /* TODO: properly implement this method */
2363         return FALSE;
2364 }
2365
2366 static gint imap_close(Folder *folder, FolderItem *item)
2367 {
2368         return 0;
2369 }
2370
2371 static gint imap_scan_tree_real(Folder *folder, gboolean subs_only)
2372 {
2373         FolderItem *item = NULL;
2374         IMAPSession *session;
2375         gchar *root_folder = NULL;
2376
2377         g_return_val_if_fail(folder != NULL, -1);
2378         g_return_val_if_fail(folder->account != NULL, -1);
2379
2380         debug_print("getting session...\n");
2381         session = imap_session_get(folder);
2382         if (!session) {
2383                 if (!folder->node) {
2384                         folder_tree_destroy(folder);
2385                         item = folder_item_new(folder, folder->name, NULL);
2386                         item->folder = folder;
2387                         folder->node = item->node = g_node_new(item);
2388                 }
2389                 return -1;
2390         }
2391
2392         if (folder->account->imap_dir && *folder->account->imap_dir) {
2393                 gchar *real_path;
2394                 int r = MAILIMAP_NO_ERROR;
2395                 clist * lep_list;
2396
2397                 Xstrdup_a(root_folder, folder->account->imap_dir, {return -1;});
2398                 extract_quote(root_folder, '"');
2399                 subst_char(root_folder,
2400                            imap_get_path_separator(session, IMAP_FOLDER(folder),
2401                                                    root_folder, &r),
2402                            '/');
2403                 if (is_fatal(r))
2404                         return -1;
2405                 strtailchomp(root_folder, '/');
2406                 real_path = imap_get_real_path
2407                         (session, IMAP_FOLDER(folder), root_folder, &r);
2408                 if (is_fatal(r))
2409                         return -1;
2410                 debug_print("IMAP root directory: %s\n", real_path);
2411
2412                 /* check if root directory exist */
2413
2414                 r = imap_threaded_list(session->folder, "", real_path,
2415                                        &lep_list);
2416
2417                 if (r != MAILIMAP_NO_ERROR)
2418                         imap_handle_error(SESSION(session), NULL, r);
2419
2420                 if ((r != MAILIMAP_NO_ERROR) || (clist_count(lep_list) == 0)) {
2421                         if (!folder->node) {
2422                                 item = folder_item_new(folder, folder->name, NULL);
2423                                 item->folder = folder;
2424                                 folder->node = item->node = g_node_new(item);
2425                         }
2426                         return -1;
2427                 }
2428                 mailimap_list_result_free(lep_list);
2429
2430                 g_free(real_path);
2431         }
2432
2433         if (folder->node)
2434                 item = FOLDER_ITEM(folder->node->data);
2435
2436         if (item && !item->path && root_folder) {
2437                 item->path = g_strdup(root_folder);
2438         }
2439
2440         if (!item || ((item->path || root_folder) &&
2441                       strcmp2(item->path, root_folder) != 0)) {
2442                 folder_tree_destroy(folder);
2443                 item = folder_item_new(folder, folder->name, root_folder);
2444                 item->folder = folder;
2445                 folder->node = item->node = g_node_new(item);
2446         }
2447
2448         imap_scan_tree_recursive(session, FOLDER_ITEM(folder->node->data), subs_only);
2449         imap_create_missing_folders(folder);
2450
2451         return 0;
2452 }
2453
2454 static gint imap_scan_tree(Folder *folder)
2455 {
2456         gboolean subs_only = FALSE;
2457         if (folder->account) {
2458                 debug_print(" scanning only subs %d\n", folder->account->imap_subsonly);
2459                 subs_only = folder->account->imap_subsonly;
2460         }
2461         return imap_scan_tree_real(folder, subs_only);
2462 }
2463
2464 static gint imap_scan_tree_recursive(IMAPSession *session, FolderItem *item, gboolean subs_only)
2465 {
2466         Folder *folder;
2467         IMAPFolder *imapfolder;
2468         FolderItem *new_item;
2469         GSList *item_list, *cur;
2470         GNode *node;
2471         gchar *real_path;
2472         gchar *wildcard_path;
2473         gchar separator;
2474         gchar wildcard[3];
2475         clist * lep_list;
2476         int r = MAILIMAP_NO_ERROR;
2477
2478         g_return_val_if_fail(item != NULL, -1);
2479         g_return_val_if_fail(item->folder != NULL, -1);
2480         g_return_val_if_fail(item->no_sub == FALSE, -1);
2481
2482         folder = item->folder;
2483         imapfolder = IMAP_FOLDER(folder);
2484
2485         separator = imap_get_path_separator(session, imapfolder, item->path, &r);
2486         if (is_fatal(r))
2487                 return r;
2488
2489         if (folder->ui_func)
2490                 folder->ui_func(folder, item, folder->ui_func_data);
2491
2492         if (item->path) {
2493                 wildcard[0] = separator;
2494                 wildcard[1] = '%';
2495                 wildcard[2] = '\0';
2496                 real_path = imap_get_real_path(session, imapfolder, item->path, &r);
2497                 if (is_fatal(r)) {
2498                         g_free(real_path);
2499                         return r;
2500                 }
2501         } else {
2502                 wildcard[0] = '%';
2503                 wildcard[1] = '\0';
2504                 real_path = g_strdup("");
2505         }
2506
2507         Xstrcat_a(wildcard_path, real_path, wildcard,
2508                   {g_free(real_path); return MAILIMAP_ERROR_BAD_STATE;});
2509         lep_list = NULL;
2510
2511         if (subs_only)
2512                 r = imap_threaded_lsub(folder, "", wildcard_path, &lep_list);
2513         else
2514                 r = imap_threaded_list(folder, "", wildcard_path, &lep_list);
2515
2516         if (r != MAILIMAP_NO_ERROR) {
2517                 imap_handle_error(SESSION(session), NULL, r);
2518                 item_list = NULL;
2519                 g_free(real_path);
2520                 return r;
2521         }
2522         else {
2523                 item_list = imap_list_from_lep(imapfolder,
2524                                                lep_list, real_path, FALSE);
2525                 mailimap_list_result_free(lep_list);
2526         }
2527
2528         g_free(real_path);
2529
2530         node = item->node->children;
2531         while (node != NULL) {
2532                 FolderItem *old_item = FOLDER_ITEM(node->data);
2533                 GNode *next = node->next;
2534
2535                 new_item = NULL;
2536                 for (cur = item_list; cur != NULL; cur = cur->next) {
2537                         FolderItem *cur_item = FOLDER_ITEM(cur->data);
2538                         if (!strcmp2(old_item->path, cur_item->path)) {
2539                                 new_item = cur_item;
2540                                 break;
2541                         }
2542                 }
2543                 if (!new_item) {
2544                         if (old_item && old_item->path && !strcmp(old_item->path, "INBOX")) {
2545                                 debug_print("not removing INBOX\n");
2546                         } else {
2547                                 debug_print("folder '%s' not found. removing...\n",
2548                                             old_item->path);
2549                                 folder_item_remove(old_item);
2550                         }
2551                 } else {
2552                         old_item->no_sub = new_item->no_sub;
2553                         old_item->no_select = new_item->no_select;
2554                         if (old_item->no_sub == TRUE && node->children) {
2555                                 debug_print("folder '%s' doesn't have "
2556                                             "subfolders. removing...\n",
2557                                             old_item->path);
2558                                 folder_item_remove_children(old_item);
2559                         }
2560                 }
2561
2562                 node = next;
2563         }
2564
2565         for (cur = item_list; cur != NULL; cur = cur->next) {
2566                 FolderItem *cur_item = FOLDER_ITEM(cur->data);
2567                 new_item = NULL;
2568
2569                 for (node = item->node->children; node != NULL;
2570                      node = node->next) {
2571                         if (!strcmp2(FOLDER_ITEM(node->data)->path,
2572                                      cur_item->path)) {
2573                                 new_item = FOLDER_ITEM(node->data);
2574                                 folder_item_destroy(cur_item);
2575                                 cur_item = NULL;
2576                                 break;
2577                         }
2578                 }
2579                 if (!new_item) {
2580                         new_item = cur_item;
2581                         debug_print("new folder '%s' found.\n", new_item->path);
2582                         folder_item_append(item, new_item);
2583                 }
2584
2585                 if (!strcmp(new_item->path, "INBOX")) {
2586                         new_item->stype = F_INBOX;
2587                         folder->inbox = new_item;
2588                 } else if (!folder_item_parent(item) || item->stype == F_INBOX) {
2589                         gchar *base;
2590
2591                         base = g_path_get_basename(new_item->path);
2592
2593                         if (!folder->outbox && !g_ascii_strcasecmp(base, "Sent")) {
2594                                 new_item->stype = F_OUTBOX;
2595                                 folder->outbox = new_item;
2596                         } else if (!folder->draft && !g_ascii_strcasecmp(base, "Drafts")) {
2597                                 new_item->stype = F_DRAFT;
2598                                 folder->draft = new_item;
2599                         } else if (!folder->queue && !g_ascii_strcasecmp(base, "Queue")) {
2600                                 new_item->stype = F_QUEUE;
2601                                 folder->queue = new_item;
2602                         } else if (!folder->trash && !g_ascii_strcasecmp(base, "Trash")) {
2603                                 new_item->stype = F_TRASH;
2604                                 folder->trash = new_item;
2605                         }
2606                         g_free(base);
2607                 }
2608
2609                 if (new_item->no_sub == FALSE)
2610                         imap_scan_tree_recursive(session, new_item, subs_only);
2611         }
2612
2613         g_slist_free(item_list);
2614
2615         return MAILIMAP_NO_ERROR;
2616 }
2617
2618 GList *imap_scan_subtree(Folder *folder, FolderItem *item, gboolean unsubs_only, gboolean recursive)
2619 {
2620         IMAPSession *session = imap_session_get(folder);
2621         gchar *real_path;
2622         gchar *wildcard_path;
2623         gchar separator;
2624         gchar wildcard[3];
2625         clist * lep_list;
2626         GSList *item_list = NULL, *cur;
2627         GList *child_list = NULL, *tmplist = NULL;
2628         GSList *sub_list = NULL;
2629         int r = MAILIMAP_NO_ERROR;
2630
2631         if (!session)
2632                 return NULL;
2633
2634         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &r);
2635         if (is_fatal(r))
2636                 return NULL;
2637
2638         if (item->path) {
2639                 wildcard[0] = separator;
2640                 wildcard[1] = '%';
2641                 wildcard[2] = '\0';
2642                 real_path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &r);
2643                 if (is_fatal(r)) {
2644                         g_free(real_path);
2645                         return NULL;
2646                 }
2647         } else {
2648                 wildcard[0] = '%';
2649                 wildcard[1] = '\0';
2650                 real_path = g_strdup("");
2651         }
2652
2653         Xstrcat_a(wildcard_path, real_path, wildcard,
2654                   {g_free(real_path); return NULL;});
2655         lep_list = NULL;
2656
2657         if (unsubs_only)
2658                 statusbar_print_all(_("Looking for unsubscribed folders in %s..."),
2659                                 item->path?item->path:item->name);
2660         else
2661                 statusbar_print_all(_("Looking for subfolders of %s..."),
2662                                 item->path?item->path:item->name);
2663
2664         r = imap_threaded_list(folder, "", wildcard_path, &lep_list);
2665         if (r) {
2666                 g_free(real_path);
2667                 statusbar_pop_all();
2668                 return NULL;
2669         }
2670         item_list = imap_list_from_lep(IMAP_FOLDER(folder),
2671                                lep_list, real_path, FALSE);
2672         mailimap_list_result_free(lep_list);
2673
2674         for (cur = item_list; cur != NULL; cur = cur->next) {
2675                 FolderItem *cur_item = FOLDER_ITEM(cur->data);
2676                 if (recursive) {
2677                         tmplist = imap_scan_subtree(folder, cur_item,
2678                                         unsubs_only, recursive);
2679                         if (tmplist)
2680                                 child_list = g_list_concat(child_list, tmplist);
2681                 }
2682                 child_list = g_list_prepend(child_list,
2683                                 imap_get_real_path(session,
2684                                         IMAP_FOLDER(folder), cur_item->path, &r));
2685                 if (is_fatal(r)) {
2686                         g_free(real_path);
2687                         statusbar_pop_all();
2688                         return NULL;
2689                 }
2690                 folder_item_destroy(cur_item);
2691         }
2692         child_list = g_list_reverse(child_list);
2693         g_slist_free(item_list);
2694
2695         if (unsubs_only) {
2696                 r = imap_threaded_lsub(folder, "", wildcard_path, &lep_list);
2697                 if (r) {
2698                         g_free(real_path);
2699                         statusbar_pop_all();
2700                         return NULL;
2701                 }
2702                 sub_list = imap_list_from_lep(IMAP_FOLDER(folder),
2703                                        lep_list, real_path, FALSE);
2704                 mailimap_list_result_free(lep_list);
2705
2706                 for (cur = sub_list; cur != NULL; cur = cur->next) {
2707                         FolderItem *cur_item = FOLDER_ITEM(cur->data);
2708                         GList *oldlitem = NULL;
2709                         gchar *tmp = imap_get_real_path(session,
2710                                         IMAP_FOLDER(folder), cur_item->path, &r);
2711                         if (r) {
2712                                 g_free(real_path);
2713                                 statusbar_pop_all();
2714                                 return NULL;
2715                         }
2716                         folder_item_destroy(cur_item);
2717                         oldlitem = g_list_find_custom(
2718                                         child_list, tmp, (GCompareFunc)strcmp2);
2719                         if (oldlitem) {
2720                                 child_list = g_list_remove_link(child_list, oldlitem);
2721                                 g_free(oldlitem->data);
2722                                 g_list_free(oldlitem);
2723                         }
2724                         g_free(tmp);
2725                 }
2726         }
2727
2728         g_free(real_path);
2729         statusbar_pop_all();
2730
2731         return child_list;
2732 }
2733
2734 static gint imap_create_tree(Folder *folder)
2735 {
2736         g_return_val_if_fail(folder != NULL, -1);
2737         g_return_val_if_fail(folder->node != NULL, -1);
2738         g_return_val_if_fail(folder->node->data != NULL, -1);
2739         g_return_val_if_fail(folder->account != NULL, -1);
2740
2741         imap_scan_tree(folder);
2742         imap_create_missing_folders(folder);
2743
2744         return 0;
2745 }
2746
2747 static void imap_create_missing_folders(Folder *folder)
2748 {
2749         g_return_if_fail(folder != NULL);
2750
2751         if (!folder->inbox)
2752                 folder->inbox = imap_create_special_folder
2753                         (folder, F_INBOX, "INBOX");
2754         if (!folder->trash)
2755                 folder->trash = imap_create_special_folder
2756                         (folder, F_TRASH, "Trash");
2757         if (!folder->queue)
2758                 folder->queue = imap_create_special_folder
2759                         (folder, F_QUEUE, "Queue");
2760         if (!folder->outbox)
2761                 folder->outbox = imap_create_special_folder
2762                         (folder, F_OUTBOX, "Sent");
2763         if (!folder->draft)
2764                 folder->draft = imap_create_special_folder
2765                         (folder, F_DRAFT, "Drafts");
2766 }
2767
2768 static FolderItem *imap_create_special_folder(Folder *folder,
2769                                               SpecialFolderItemType stype,
2770                                               const gchar *name)
2771 {
2772         FolderItem *item;
2773         FolderItem *new_item;
2774
2775         g_return_val_if_fail(folder != NULL, NULL);
2776         g_return_val_if_fail(folder->node != NULL, NULL);
2777         g_return_val_if_fail(folder->node->data != NULL, NULL);
2778         g_return_val_if_fail(folder->account != NULL, NULL);
2779         g_return_val_if_fail(name != NULL, NULL);
2780
2781         item = FOLDER_ITEM(folder->node->data);
2782         new_item = imap_create_folder(folder, item, name);
2783
2784         if (!new_item) {
2785                 g_warning("Can't create '%s'\n", name);
2786                 if (!folder->inbox) return NULL;
2787
2788                 new_item = imap_create_folder(folder, folder->inbox, name);
2789                 if (!new_item)
2790                         g_warning("Can't create '%s' under INBOX\n", name);
2791                 else
2792                         new_item->stype = stype;
2793         } else
2794                 new_item->stype = stype;
2795
2796         return new_item;
2797 }
2798
2799 static gchar *imap_folder_get_path(Folder *folder)
2800 {
2801         gchar *folder_path;
2802
2803         g_return_val_if_fail(folder != NULL, NULL);
2804         g_return_val_if_fail(folder->account != NULL, NULL);
2805
2806         folder_path = g_strconcat(get_imap_cache_dir(),
2807                                   G_DIR_SEPARATOR_S,
2808                                   folder->account->recv_server,
2809                                   G_DIR_SEPARATOR_S,
2810                                   folder->account->userid,
2811                                   NULL);
2812
2813         return folder_path;
2814 }
2815
2816 #ifdef G_OS_WIN32
2817 static gchar *imap_encode_unsafe_chars(const gchar *str)
2818 {
2819         gchar *ret = NULL, *o_ret;
2820         gchar *i;
2821         if (!str)
2822                 return NULL;
2823         ret = g_malloc(3*strlen(str)+1);
2824         o_ret = ret;
2825         for (i = str; *i; i++) {
2826                 switch(*i) {
2827                         case ':':
2828                         case '|':
2829                         case '<':
2830                         case '>':
2831                         case '*':
2832                         case '?':
2833                         case '#':
2834                                 *ret++ = '%';
2835                                 *ret++ = '0'+(*i/10);
2836                                 *ret++ = '0'+(*i%10);
2837                                 break;
2838                         default:
2839                                 *ret++ = *i;
2840                 }
2841         }
2842         *ret++ = '\0';
2843         return o_ret;
2844 }
2845 #endif
2846 static gchar *imap_item_get_path(Folder *folder, FolderItem *item)
2847 {
2848         gchar *folder_path, *path;
2849         gchar *item_path = NULL;
2850
2851         g_return_val_if_fail(folder != NULL, NULL);
2852         g_return_val_if_fail(item != NULL, NULL);
2853         folder_path = imap_folder_get_path(folder);
2854
2855         g_return_val_if_fail(folder_path != NULL, NULL);
2856
2857 #ifdef G_OS_UNIX
2858         item_path = g_strdup(item->path);
2859 #else
2860         item_path = imap_encode_unsafe_chars(item->path);
2861 #endif
2862
2863         if (g_path_is_absolute(folder_path)) {
2864                 if (item_path)
2865                         path = g_strconcat(folder_path, G_DIR_SEPARATOR_S,
2866                                            item_path, NULL);
2867                 else
2868                         path = g_strdup(folder_path);
2869         } else {
2870                 if (item_path)
2871                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
2872                                            folder_path, G_DIR_SEPARATOR_S,
2873                                            item_path, NULL);
2874                 else
2875                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
2876                                            folder_path, NULL);
2877         }
2878         g_free(folder_path);
2879         g_free(item_path);
2880 #ifdef G_OS_WIN32
2881         while (strchr(path, '/'))
2882                 *strchr(path, '/') = '\\';
2883 #endif
2884
2885         return path;
2886 }
2887
2888 static FolderItem *imap_create_folder(Folder *folder, FolderItem *parent,
2889                                const gchar *name)
2890 {
2891         gchar *dirpath, *imap_path;
2892         IMAPSession *session;
2893         FolderItem *new_item;
2894         gchar separator;
2895         gchar *new_name;
2896         const gchar *p;
2897         gint ok = MAILIMAP_NO_ERROR;
2898         gboolean no_select = FALSE, no_sub = FALSE;
2899         gboolean exist = FALSE;
2900
2901         g_return_val_if_fail(folder != NULL, NULL);
2902         g_return_val_if_fail(folder->account != NULL, NULL);
2903         g_return_val_if_fail(parent != NULL, NULL);
2904         g_return_val_if_fail(name != NULL, NULL);
2905
2906         debug_print("getting session...\n");
2907         session = imap_session_get(folder);
2908         if (!session) {
2909                 return NULL;
2910         }
2911
2912         if (!folder_item_parent(parent) && strcmp(name, "INBOX") == 0) {
2913                 dirpath = g_strdup(name);
2914         }else if (parent->path)
2915                 dirpath = g_strconcat(parent->path, "/", name, NULL);
2916         else if ((p = strchr(name, '/')) != NULL && *(p + 1) != '\0')
2917                 dirpath = g_strdup(name);
2918         else if (folder->account->imap_dir && *folder->account->imap_dir) {
2919                 gchar *imap_dir;
2920
2921                 Xstrdup_a(imap_dir, folder->account->imap_dir, {return NULL;});
2922                 strtailchomp(imap_dir, '/');
2923                 dirpath = g_strconcat(imap_dir, "/", name, NULL);
2924         } else
2925                 dirpath = g_strdup(name);
2926
2927
2928
2929         /* keep trailing directory separator to create a folder that contains
2930            sub folder */
2931         imap_path = imap_utf8_to_modified_utf7(dirpath, FALSE);
2932
2933         strtailchomp(dirpath, '/');
2934         Xstrdup_a(new_name, name, {
2935                 g_free(dirpath);
2936                 g_free(imap_path);
2937                 return NULL;});
2938
2939         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), imap_path, &ok);
2940         if (is_fatal(ok)) {
2941                 g_free(imap_path);
2942                 return NULL;
2943         }
2944         imap_path_separator_subst(imap_path, separator);
2945         /* remove trailing / for display */
2946         strtailchomp(new_name, '/');
2947
2948         if (strcmp(dirpath, "INBOX") != 0) {
2949                 GPtrArray *argbuf;
2950                 int r;
2951                 clist * lep_list;
2952
2953                 argbuf = g_ptr_array_new();
2954                 r = imap_threaded_list(folder, "", imap_path, &lep_list);
2955                 if (r != MAILIMAP_NO_ERROR) {
2956                         imap_handle_error(SESSION(session), NULL, r);
2957                         log_warning(LOG_PROTOCOL, _("can't create mailbox: LIST failed\n"));
2958                         g_free(imap_path);
2959                         g_free(dirpath);
2960                         ptr_array_free_strings(argbuf);
2961                         g_ptr_array_free(argbuf, TRUE);
2962                         return NULL;
2963                 }
2964
2965                 if (clist_count(lep_list) > 0)
2966                         exist = TRUE;
2967                 mailimap_list_result_free(lep_list);
2968                 lep_list = NULL;
2969                 if (!exist) {
2970                         ok = imap_cmd_create(session, imap_path);
2971                         if (ok != MAILIMAP_NO_ERROR) {
2972                                 log_warning(LOG_PROTOCOL, _("can't create mailbox\n"));
2973                                 g_free(imap_path);
2974                                 g_free(dirpath);
2975                                 return NULL;
2976                         }
2977                         r = imap_threaded_list(folder, "", imap_path, &lep_list);
2978                         if (r == MAILIMAP_NO_ERROR) {
2979                                 GSList *item_list = imap_list_from_lep(IMAP_FOLDER(folder),
2980                                                lep_list, dirpath, TRUE);
2981                                 if (item_list) {
2982                                         FolderItem *cur_item = FOLDER_ITEM(item_list->data);
2983                                         no_select = cur_item->no_select;
2984                                         no_sub = cur_item->no_sub;
2985                                         g_slist_free(item_list);
2986                                 }
2987                                 mailimap_list_result_free(lep_list);
2988                         } else {
2989                                 imap_handle_error(SESSION(session), NULL, r);
2990                         }
2991                 }
2992                 imap_threaded_subscribe(folder, imap_path, TRUE);
2993         } else {
2994                 clist *lep_list;
2995                 int r;
2996                 /* just get flags */
2997                 r = imap_threaded_list(folder, "", "INBOX", &lep_list);
2998                 if (r == MAILIMAP_NO_ERROR) {
2999                         GSList *item_list = imap_list_from_lep(IMAP_FOLDER(folder),
3000                                        lep_list, dirpath, TRUE);
3001                         if (item_list) {
3002                                 FolderItem *cur_item = FOLDER_ITEM(item_list->data);
3003                                 no_select = cur_item->no_select;
3004                                 no_sub = cur_item->no_sub;
3005                                 g_slist_free(item_list);
3006                         }
3007                         mailimap_list_result_free(lep_list);
3008                 } else {
3009                         imap_handle_error(SESSION(session), NULL, r);
3010                 }
3011         }
3012
3013         new_item = folder_item_new(folder, new_name, dirpath);
3014         new_item->no_select = no_select;
3015         new_item->no_sub = no_sub;
3016         folder_item_append(parent, new_item);
3017         g_free(imap_path);
3018         g_free(dirpath);
3019
3020         dirpath = folder_item_get_path(new_item);
3021         if (!is_dir_exist(dirpath))
3022                 make_dir_hier(dirpath);
3023         g_free(dirpath);
3024
3025         if (exist) {
3026                 /* folder existed, scan it */
3027                 imap_scan_required(folder, new_item);
3028                 folder_item_scan_full(new_item, FALSE);
3029         }
3030
3031         return new_item;
3032 }
3033
3034 static gint imap_rename_folder(Folder *folder, FolderItem *item,
3035                                const gchar *name)
3036 {
3037         gchar *dirpath;
3038         gchar *newpath;
3039         gchar *real_oldpath;
3040         gchar *real_newpath;
3041         gchar *paths[2];
3042         gchar *old_cache_dir;
3043         gchar *new_cache_dir;
3044         IMAPSession *session;
3045         gchar separator;
3046         gint ok = MAILIMAP_NO_ERROR;
3047         gint exists, recent, unseen;
3048         guint32 uid_validity;
3049
3050         g_return_val_if_fail(folder != NULL, -1);
3051         g_return_val_if_fail(item != NULL, -1);
3052         g_return_val_if_fail(item->path != NULL, -1);
3053         g_return_val_if_fail(name != NULL, -1);
3054
3055         debug_print("getting session...\n");
3056         session = imap_session_get(folder);
3057         if (!session) {
3058                 return -1;
3059         }
3060
3061         if (strchr(name, imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &ok)) != NULL ||
3062                 is_fatal(ok)) {
3063                 g_warning(_("New folder name must not contain the namespace "
3064                             "path separator"));
3065                 return -1;
3066         }
3067
3068         real_oldpath = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &ok);
3069         if (is_fatal(ok)) {
3070                 return -1;
3071         }
3072
3073         g_free(session->mbox);
3074         session->mbox = NULL;
3075         session->exists = 0;
3076         session->recent = 0;
3077         session->expunge = 0;
3078         ok = imap_cmd_examine(session, "INBOX",
3079                               &exists, &recent, &unseen, &uid_validity, FALSE);
3080         if (ok != MAILIMAP_NO_ERROR) {
3081                 g_free(real_oldpath);
3082                 return -1;
3083         }
3084
3085         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &ok);
3086         if (is_fatal(ok))
3087                 return -1;
3088         if (strchr(item->path, G_DIR_SEPARATOR)) {
3089                 dirpath = g_path_get_dirname(item->path);
3090                 newpath = g_strconcat(dirpath, G_DIR_SEPARATOR_S, name, NULL);
3091                 g_free(dirpath);
3092         } else
3093                 newpath = g_strdup(name);
3094
3095         real_newpath = imap_utf8_to_modified_utf7(newpath, FALSE);
3096         imap_path_separator_subst(real_newpath, separator);
3097
3098         ok = imap_cmd_rename(session, real_oldpath, real_newpath);
3099         if (ok != MAILIMAP_NO_ERROR) {
3100                 log_warning(LOG_PROTOCOL, _("can't rename mailbox: %s to %s\n"),
3101                             real_oldpath, real_newpath);
3102                 g_free(real_oldpath);
3103                 g_free(newpath);
3104                 g_free(real_newpath);
3105                 return -1;
3106         }
3107         g_free(item->name);
3108         item->name = g_strdup(name);
3109
3110         old_cache_dir = folder_item_get_path(item);
3111
3112         paths[0] = g_strdup(item->path);
3113         paths[1] = newpath;
3114         g_node_traverse(item->node, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
3115                         imap_rename_folder_func, paths);
3116
3117         if (is_dir_exist(old_cache_dir)) {
3118                 new_cache_dir = folder_item_get_path(item);
3119                 if (g_rename(old_cache_dir, new_cache_dir) < 0) {
3120                         FILE_OP_ERROR(old_cache_dir, "rename");
3121                 }
3122                 g_free(new_cache_dir);
3123         }
3124
3125         g_free(old_cache_dir);
3126         g_free(paths[0]);
3127         g_free(newpath);
3128         g_free(real_oldpath);
3129         g_free(real_newpath);
3130         return 0;
3131 }
3132
3133 gint imap_subscribe(Folder *folder, FolderItem *item, gchar *rpath, gboolean sub)
3134 {
3135         gchar *path;
3136         gint r = MAILIMAP_NO_ERROR;
3137         IMAPSession *session;
3138         debug_print("getting session...\n");
3139
3140         session = imap_session_get(folder);
3141         if (!session) {
3142                 return -1;
3143         }
3144         if (item && item->path) {
3145                 path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &r);
3146                 if (!path)
3147                         return -1;
3148                 if (is_fatal(r)) {
3149                         g_free(path);
3150                         return -1;
3151                 }
3152                 if (!strcmp(path, "INBOX") && sub == FALSE) {
3153                         g_free(path);
3154                         return -1;
3155                 }
3156                 debug_print("%ssubscribing %s\n", sub?"":"un", path);
3157                 r = imap_threaded_subscribe(folder, path, sub);
3158                 g_free(path);
3159         } else if (rpath) {
3160                 r = imap_threaded_subscribe(folder, rpath, sub);
3161         } else
3162                 return -1;
3163         return r;
3164 }
3165
3166 static gint imap_remove_folder_real(Folder *folder, FolderItem *item)
3167 {
3168         gint ok = MAILIMAP_NO_ERROR;
3169         IMAPSession *session;
3170         gchar *path;
3171         gchar *cache_dir;
3172         gboolean selected_folder;
3173
3174         g_return_val_if_fail(folder != NULL, -1);
3175         g_return_val_if_fail(item != NULL, -1);
3176         g_return_val_if_fail(item->path != NULL, -1);
3177
3178         debug_print("getting session...\n");
3179         session = imap_session_get(folder);
3180         if (!session) {
3181                 return -1;
3182         }
3183         path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &ok);
3184         if (is_fatal(ok))
3185                 return -1;
3186
3187         imap_threaded_subscribe(folder, path, FALSE);
3188
3189         selected_folder = (session->mbox != NULL) &&
3190                           (!strcmp(session->mbox, item->path));
3191         if (selected_folder) {
3192                 ok = imap_cmd_close(session);
3193                 if (ok != MAILIMAP_NO_ERROR) {
3194                         debug_print("close err %d\n", ok);
3195                         return ok;
3196                 }
3197         }
3198         ok = imap_cmd_delete(session, path);
3199         if (ok != MAILIMAP_NO_ERROR && !is_fatal(ok)) {
3200                 gchar *tmp = NULL;
3201
3202                 ok = MAILIMAP_NO_ERROR;
3203                 tmp = g_strdup_printf("%s%c", path,
3204                                 imap_get_path_separator(session, IMAP_FOLDER(folder), path, &ok));
3205                 g_free(path);
3206                 path = tmp;
3207                 if (!is_fatal(ok))
3208                         ok = imap_cmd_delete(session, path);
3209         }
3210
3211         if (ok != MAILIMAP_NO_ERROR) {
3212                 log_warning(LOG_PROTOCOL, _("can't delete mailbox\n"));
3213                 g_free(path);
3214                 return -1;
3215         }
3216
3217         g_free(path);
3218         cache_dir = folder_item_get_path(item);
3219         if (is_dir_exist(cache_dir) && remove_dir_recursive(cache_dir) < 0)
3220                 g_warning("can't remove directory '%s'\n", cache_dir);
3221         g_free(cache_dir);
3222         folder_item_remove(item);
3223         return 0;
3224 }
3225
3226 static gint imap_remove_folder(Folder *folder, FolderItem *item)
3227 {
3228         GNode *node, *next;
3229
3230         g_return_val_if_fail(item != NULL, -1);
3231         g_return_val_if_fail(item->folder != NULL, -1);
3232         g_return_val_if_fail(item->node != NULL, -1);
3233
3234         node = item->node->children;
3235         while (node != NULL) {
3236                 next = node->next;
3237                 if (imap_remove_folder(folder, FOLDER_ITEM(node->data)) < 0)
3238                         return -1;
3239                 node = next;
3240         }
3241         debug_print("IMAP removing %s\n", item->path);
3242
3243         if (imap_remove_all_msg(folder, item) < 0)
3244                 return -1;
3245         return imap_remove_folder_real(folder, item);
3246 }
3247
3248 typedef struct _uncached_data {
3249         IMAPSession *session;
3250         FolderItem *item;
3251         MsgNumberList *numlist;
3252         guint cur;
3253         guint total;
3254         gboolean done;
3255         int ok;
3256 } uncached_data;
3257
3258 static void *imap_get_uncached_messages_thread(void *data)
3259 {
3260         uncached_data *stuff = (uncached_data *)data;
3261         IMAPSession *session = stuff->session;
3262         FolderItem *item = stuff->item;
3263         MsgNumberList *numlist = stuff->numlist;
3264         GSList *newlist = NULL;
3265         GSList *llast = NULL;
3266         GSList *seq_list, *cur;
3267         gboolean got_alien_tags = FALSE;
3268
3269         debug_print("uncached_messages\n");
3270
3271         if (session == NULL || item == NULL || item->folder == NULL
3272             || FOLDER_CLASS(item->folder) != &imap_class) {
3273                 stuff->done = TRUE;
3274                 return NULL;
3275         }
3276
3277         seq_list = imap_get_lep_set_from_numlist(IMAP_FOLDER(item->folder), numlist);
3278         debug_print("get msgs info\n");
3279         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
3280                 struct mailimap_set * imapset;
3281                 unsigned int i;
3282                 int r;
3283                 carray * env_list;
3284                 int count;
3285
3286                 if (session->cancelled)
3287                         break;
3288
3289                 imapset = cur->data;
3290
3291                 r = imap_threaded_fetch_env(session->folder,
3292                                             imapset, &env_list);
3293                 if (r != MAILIMAP_NO_ERROR) {
3294                         imap_handle_error(SESSION(session), NULL, r);
3295                         if (is_fatal(r)) {
3296                                 stuff->ok = r;
3297                                 return NULL;
3298                         }
3299                         continue;
3300                 }
3301
3302                 session_set_access_time(SESSION(session));
3303
3304                 count = 0;
3305                 for(i = 0 ; i < carray_count(env_list) ; i += 2) {
3306                         struct imap_fetch_env_info * info;
3307                         MsgInfo * msginfo;
3308                         GSList *tags = NULL, *cur = NULL;
3309                         info = carray_get(env_list, i);
3310                         tags = carray_get(env_list, i+1);
3311                         msginfo = imap_envelope_from_lep(info, item);
3312                         if (msginfo == NULL) {
3313                                 slist_free_strings_full(tags);
3314                                 continue;
3315                         }
3316                         g_slist_free(msginfo->tags);
3317                         msginfo->tags = NULL;
3318
3319                         for (cur = tags; cur; cur = cur->next) {
3320                                 gchar *real_tag = imap_modified_utf7_to_utf8(cur->data, TRUE);
3321                                 gint id = 0;
3322                                 id = tags_get_id_for_str(real_tag);
3323                                 if (id == -1) {
3324                                         id = tags_add_tag(real_tag);
3325                                         got_alien_tags = TRUE;
3326                                 }
3327                                 if (!g_slist_find(msginfo->tags, GINT_TO_POINTER(id))) {
3328                                         msginfo->tags = g_slist_prepend(
3329                                                         msginfo->tags,
3330                                                         GINT_TO_POINTER(id));
3331                                 }
3332                                 g_free(real_tag);
3333                         }
3334                         if (msginfo->tags)
3335                                 msginfo->tags = g_slist_reverse(msginfo->tags);
3336                         slist_free_strings_full(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_full(session->capability);
3821         session->capability = NULL;
3822 }
3823
3824 /* low-level IMAP4rev1 commands */
3825
3826 static gint imap_cmd_login(IMAPSession *session,
3827                            const gchar *user, const gchar *pass,
3828                            const gchar *type)
3829 {
3830         int r;
3831         gint ok;
3832
3833         if (!strcmp(type, "LOGIN") && imap_has_capability(session, "LOGINDISABLED")) {
3834                 gint ok = MAILIMAP_ERROR_BAD_STATE;
3835                 if (imap_has_capability(session, "STARTTLS")) {
3836 #ifdef USE_GNUTLS
3837                         log_warning(LOG_PROTOCOL, _("Server requires TLS to log in.\n"));
3838                         ok = imap_cmd_starttls(session);
3839                         if (ok != MAILIMAP_NO_ERROR) {
3840                                 log_warning(LOG_PROTOCOL, _("Can't start TLS session.\n"));
3841                                 return ok;
3842                         } else {
3843                                 /* refresh capas */
3844                                 imap_free_capabilities(session);
3845                                 if ((r = imap_get_capabilities(session)) != MAILIMAP_NO_ERROR) {
3846                                         imap_handle_error(SESSION(session), NULL, r);
3847                                         log_warning(LOG_PROTOCOL, _("Can't refresh capabilities.\n"));
3848                                         return r;
3849                                 }
3850                         }
3851 #else
3852                         log_error(LOG_PROTOCOL, _("Connection to %s failed: "
3853                                         "server requires TLS, but Claws Mail "
3854                                         "has been compiled without OpenSSL "
3855                                         "support.\n"),
3856                                         SESSION(session)->server);
3857                         return MAILIMAP_ERROR_LOGIN;
3858 #endif
3859                 } else {
3860                         log_error(LOG_PROTOCOL, _("Server logins are disabled.\n"));
3861                         return MAILIMAP_ERROR_LOGIN;
3862                 }
3863         }
3864
3865         log_print(LOG_PROTOCOL, "IMAP4> Logging %s to %s using %s\n",
3866                         user,
3867                         SESSION(session)->server,
3868                         type);
3869         r = imap_threaded_login(session->folder, user, pass, type);
3870         if (r != MAILIMAP_NO_ERROR) {
3871                 imap_handle_error(SESSION(session), NULL, r);
3872                 log_print(LOG_PROTOCOL, "IMAP4< Error logging in to %s\n",
3873                                 SESSION(session)->server);
3874                 ok = r;
3875         } else {
3876                 log_print(LOG_PROTOCOL, "IMAP4< Login to %s successful\n",
3877                                 SESSION(session)->server);
3878                 ok = MAILIMAP_NO_ERROR;
3879         }
3880         return ok;
3881 }
3882
3883 static gint imap_cmd_noop(IMAPSession *session)
3884 {
3885         int r;
3886         unsigned int exists, recent, expunge, unseen, uidnext, uidval;
3887
3888         r = imap_threaded_noop(session->folder, &exists, &recent, &expunge, &unseen, &uidnext, &uidval);
3889         if (r != MAILIMAP_NO_ERROR) {
3890                 imap_handle_error(SESSION(session), NULL, r);
3891                 debug_print("noop err %d\n", r);
3892                 return r;
3893         }
3894
3895         session->folder_content_changed = FALSE;
3896
3897         if ((exists && exists != session->exists)
3898          || (recent && recent != session->recent)
3899          || (expunge && expunge != session->expunge)
3900          || (unseen && unseen != session->unseen)) {
3901                 session->folder_content_changed = TRUE;
3902         }
3903         if (uidnext != 0 && uidnext != session->uid_next) {
3904                 session->uid_next = uidnext;
3905                 session->folder_content_changed = TRUE;
3906         }
3907         if (uidval != 0 && uidval != session->uid_validity) {
3908                 session->uid_validity = uidval;
3909                 session->folder_content_changed = TRUE;
3910         }
3911
3912         session->exists = exists;
3913         session->recent = recent;
3914         session->expunge = expunge;
3915         session->unseen = unseen;
3916
3917         session_set_access_time(SESSION(session));
3918
3919         return MAILIMAP_NO_ERROR;
3920 }
3921
3922 #ifdef USE_GNUTLS
3923 static gint imap_cmd_starttls(IMAPSession *session)
3924 {
3925         int r;
3926
3927         r = imap_threaded_starttls(session->folder,
3928                 SESSION(session)->server, SESSION(session)->port);
3929         if (r != MAILIMAP_NO_ERROR) {
3930                 imap_handle_error(SESSION(session), NULL, r);
3931                 debug_print("starttls err %d\n", r);
3932                 return r;
3933         }
3934         return MAILIMAP_NO_ERROR;
3935 }
3936 #endif
3937
3938 static gint imap_cmd_select(IMAPSession *session, const gchar *folder,
3939                             gint *exists, gint *recent, gint *unseen,
3940                             guint32 *uid_validity, gint *can_create_flags,
3941                             GSList **ok_flags, gboolean block)
3942 {
3943         int r;
3944
3945         r = imap_threaded_select(session->folder, folder,
3946                                  exists, recent, unseen, uid_validity, can_create_flags, ok_flags);
3947         if (r != MAILIMAP_NO_ERROR) {
3948                 imap_handle_error(SESSION(session), NULL, r);
3949                 debug_print("select err %d\n", r);
3950                 return r;
3951         }
3952         return MAILIMAP_NO_ERROR;
3953 }
3954
3955 static gint imap_cmd_close(IMAPSession *session)
3956 {
3957         int r;
3958
3959         r = imap_threaded_close(session->folder);
3960         if (r != MAILIMAP_NO_ERROR) {
3961                 imap_handle_error(SESSION(session), NULL, r);
3962                 debug_print("close err %d\n", r);
3963                 return r;
3964         }
3965         g_free(session->mbox);
3966         session->mbox = NULL;
3967         session->exists = 0;
3968         session->recent = 0;
3969         session->expunge = 0;
3970         return MAILIMAP_NO_ERROR;
3971 }
3972
3973 static gint imap_cmd_examine(IMAPSession *session, const gchar *folder,
3974                              gint *exists, gint *recent, gint *unseen,
3975                              guint32 *uid_validity, gboolean block)
3976 {
3977         int r;
3978
3979         r = imap_threaded_examine(session->folder, folder,
3980                                   exists, recent, unseen, uid_validity);
3981         if (r != MAILIMAP_NO_ERROR) {
3982                 imap_handle_error(SESSION(session), NULL, r);
3983                 debug_print("examine err %d\n", r);
3984
3985                 return r;
3986         }
3987         return MAILIMAP_NO_ERROR;
3988 }
3989
3990 static gint imap_cmd_create(IMAPSession *session, const gchar *folder)
3991 {
3992         int r;
3993
3994         r = imap_threaded_create(session->folder, folder);
3995         if (r != MAILIMAP_NO_ERROR) {
3996                 imap_handle_error(SESSION(session), NULL, r);
3997                 return r;
3998         }
3999
4000         return MAILIMAP_NO_ERROR;
4001 }
4002
4003 static gint imap_cmd_rename(IMAPSession *session, const gchar *old_folder,
4004                             const gchar *new_folder)
4005 {
4006         int r;
4007
4008         r = imap_threaded_rename(session->folder, old_folder,
4009                                  new_folder);
4010         if (r != MAILIMAP_NO_ERROR) {
4011                 imap_handle_error(SESSION(session), NULL, r);
4012                 return r;
4013         }
4014
4015         return MAILIMAP_NO_ERROR;
4016 }
4017
4018 static gint imap_cmd_delete(IMAPSession *session, const gchar *folder)
4019 {
4020         int r;
4021
4022
4023         r = imap_threaded_delete(session->folder, folder);
4024         if (r != MAILIMAP_NO_ERROR) {
4025                 imap_handle_error(SESSION(session), NULL, r);
4026                 return r;
4027         }
4028
4029         return MAILIMAP_NO_ERROR;
4030 }
4031
4032 typedef struct _fetch_data {
4033         IMAPSession *session;
4034         guint32 uid;
4035         const gchar *filename;
4036         gboolean headers;
4037         gboolean body;
4038         gboolean done;
4039 } fetch_data;
4040
4041 static void *imap_cmd_fetch_thread(void *data)
4042 {
4043         fetch_data *stuff = (fetch_data *)data;
4044         IMAPSession *session = stuff->session;
4045         guint32 uid = stuff->uid;
4046         const gchar *filename = stuff->filename;
4047         int r;
4048
4049         if (stuff->body) {
4050                 r = imap_threaded_fetch_content(session->folder,
4051                                                uid, 1, filename);
4052         }
4053         else {
4054                 r = imap_threaded_fetch_content(session->folder,
4055                                                 uid, 0, filename);
4056         }
4057         if (r != MAILIMAP_NO_ERROR) {
4058                 imap_handle_error(SESSION(session), NULL, r);
4059                 debug_print("fetch err %d\n", r);
4060                 return GINT_TO_POINTER(r);
4061         }
4062         return GINT_TO_POINTER(MAILIMAP_NO_ERROR);
4063 }
4064
4065 static gint imap_cmd_fetch(IMAPSession *session, guint32 uid,
4066                                 const gchar *filename, gboolean headers,
4067                                 gboolean body)
4068 {
4069         fetch_data *data = g_new0(fetch_data, 1);
4070         int result = 0;
4071         data->done = FALSE;
4072         data->session = session;
4073         data->uid = uid;
4074         data->filename = filename;
4075         data->headers = headers;
4076         data->body = body;
4077
4078         if (prefs_common.work_offline &&
4079             !inc_offline_should_override(FALSE,
4080                 _("Claws Mail needs network access in order "
4081                   "to access the IMAP server."))) {
4082                 g_free(data);
4083                 return -1;
4084         }
4085         statusbar_print_all(_("Fetching message..."));
4086         result = GPOINTER_TO_INT(imap_cmd_fetch_thread(data));
4087         statusbar_pop_all();
4088         g_free(data);
4089         return result;
4090 }
4091
4092
4093 static gint imap_cmd_append(IMAPSession *session,
4094                             IMAPFolderItem *item,
4095                             const gchar *destfolder,
4096                             const gchar *file, IMAPFlags flags,
4097                             guint32 *new_uid)
4098 {
4099         struct mailimap_flag_list * flag_list;
4100         int r;
4101
4102         cm_return_val_if_fail(file != NULL, MAILIMAP_ERROR_BAD_STATE);
4103
4104         flag_list = imap_flag_to_lep(item, flags, NULL);
4105         lock_session(session);
4106         r = imap_threaded_append(session->folder, destfolder,
4107                          file, flag_list, (int *)new_uid);
4108         mailimap_flag_list_free(flag_list);
4109
4110         if (r != MAILIMAP_NO_ERROR) {
4111                 imap_handle_error(SESSION(session), NULL, r);
4112                 debug_print("append err %d\n", r);
4113                 return r;
4114         }
4115
4116         unlock_session(session);
4117
4118         return MAILIMAP_NO_ERROR;
4119 }
4120
4121 static gint imap_cmd_copy(IMAPSession *session, struct mailimap_set * set,
4122                           const gchar *destfolder,
4123                           struct mailimap_set **source, struct mailimap_set **dest)
4124 {
4125         int r;
4126
4127         g_return_val_if_fail(session != NULL, MAILIMAP_ERROR_BAD_STATE);
4128         g_return_val_if_fail(set != NULL, MAILIMAP_ERROR_BAD_STATE);
4129         g_return_val_if_fail(destfolder != NULL, MAILIMAP_ERROR_BAD_STATE);
4130
4131         r = imap_threaded_copy(session->folder, set, destfolder, source, dest);
4132         if (r != MAILIMAP_NO_ERROR) {
4133                 imap_handle_error(SESSION(session), NULL, r);
4134                 return r;
4135         }
4136
4137         return MAILIMAP_NO_ERROR;
4138 }
4139
4140 static gint imap_cmd_store(IMAPSession *session,
4141                            IMAPFolderItem *item,
4142                            struct mailimap_set * set,
4143                            IMAPFlags flags, GSList *tags, int do_add)
4144 {
4145         int r;
4146         struct mailimap_flag_list * flag_list = NULL;
4147         struct mailimap_store_att_flags * store_att_flags;
4148
4149         flag_list = imap_flag_to_lep(item, flags, tags);
4150
4151         if (do_add)
4152                 store_att_flags =
4153                         mailimap_store_att_flags_new_add_flags_silent(flag_list);
4154         else
4155                 store_att_flags =
4156                         mailimap_store_att_flags_new_remove_flags_silent(flag_list);
4157
4158         r = imap_threaded_store(session->folder, set, store_att_flags);
4159         mailimap_store_att_flags_free(store_att_flags);
4160         if (r != MAILIMAP_NO_ERROR) {
4161                 imap_handle_error(SESSION(session), NULL, r);
4162                 return r;
4163         }
4164
4165         return MAILIMAP_NO_ERROR;
4166 }
4167
4168 static gint imap_cmd_expunge(IMAPSession *session, gboolean do_expunge)
4169 {
4170         int r;
4171
4172         if (!do_expunge)
4173                 return MAILIMAP_NO_ERROR;
4174
4175         if (prefs_common.work_offline &&
4176             !inc_offline_should_override(FALSE,
4177                 _("Claws Mail needs network access in order "
4178                   "to access the IMAP server."))) {
4179                 return -1;
4180         }
4181
4182         r = imap_threaded_expunge(session->folder);
4183         if (r != MAILIMAP_NO_ERROR) {
4184                 imap_handle_error(SESSION(session), NULL, r);
4185                 return r;
4186         }
4187
4188         return MAILIMAP_NO_ERROR;
4189 }
4190
4191 gint imap_expunge(Folder *folder, FolderItem *item)
4192 {
4193         IMAPSession *session = imap_session_get(folder);
4194         if (session == NULL)
4195                 return -1;
4196
4197         return imap_cmd_expunge(session, TRUE);
4198 }
4199
4200 static void imap_path_separator_subst(gchar *str, gchar separator)
4201 {
4202         gchar *p;
4203         gboolean in_escape = FALSE;
4204
4205         if (!separator || separator == '/') return;
4206
4207         for (p = str; *p != '\0'; p++) {
4208                 if (*p == '/' && !in_escape)
4209                         *p = separator;
4210                 else if (*p == '&' && *(p + 1) != '-' && !in_escape)
4211                         in_escape = TRUE;
4212                 else if (*p == '-' && in_escape)
4213                         in_escape = FALSE;
4214         }
4215 }
4216
4217 static gboolean imap_rename_folder_func(GNode *node, gpointer data)
4218 {
4219         FolderItem *item = node->data;
4220         gchar **paths = data;
4221         const gchar *oldpath = paths[0];
4222         const gchar *newpath = paths[1];
4223         gchar *real_oldpath, *real_newpath;
4224         gchar *base;
4225         gchar *new_itempath;
4226         gint oldpathlen;
4227         IMAPSession *session = imap_session_get(item->folder);
4228         gint ok = MAILIMAP_NO_ERROR;
4229         oldpathlen = strlen(oldpath);
4230         if (strncmp(oldpath, item->path, oldpathlen) != 0) {
4231                 g_warning("path doesn't match: %s, %s\n", oldpath, item->path);
4232                 return TRUE;
4233         }
4234
4235         base = item->path + oldpathlen;
4236         while (*base == G_DIR_SEPARATOR) base++;
4237         if (*base == '\0')
4238                 new_itempath = g_strdup(newpath);
4239         else
4240                 new_itempath = g_strconcat(newpath, G_DIR_SEPARATOR_S, base,
4241                                            NULL);
4242
4243         real_oldpath = imap_get_real_path(session, IMAP_FOLDER(item->folder), item->path, &ok);
4244         g_free(item->path);
4245         item->path = new_itempath;
4246
4247         real_newpath = imap_get_real_path(session, IMAP_FOLDER(item->folder), item->path, &ok);
4248
4249         imap_threaded_subscribe(item->folder, real_oldpath, FALSE);
4250         imap_threaded_subscribe(item->folder, real_newpath, TRUE);
4251
4252         g_free(real_oldpath);
4253         g_free(real_newpath);
4254         return FALSE;
4255 }
4256
4257 static gint get_list_of_uids(IMAPSession *session, Folder *folder, IMAPFolderItem *item, GSList **msgnum_list)
4258 {
4259         GSList *uidlist, *elem;
4260         int r = -1;
4261         clist * lep_uidlist;
4262         gint ok, nummsgs = 0;
4263
4264         if (session == NULL) {
4265                 return -1;
4266         }
4267
4268         ok = imap_select(session, IMAP_FOLDER(folder), FOLDER_ITEM(item),
4269                          NULL, NULL, NULL, NULL, NULL, TRUE);
4270         if (ok != MAILIMAP_NO_ERROR) {
4271                 return -1;
4272         }
4273
4274         g_slist_free(item->uid_list);
4275         item->uid_list = NULL;
4276
4277         uidlist = NULL;
4278
4279         if (folder->account && folder->account->low_bandwidth) {
4280                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SIMPLE,
4281                                 NULL, NULL, &lep_uidlist);
4282         }
4283
4284         if (r == MAILIMAP_NO_ERROR) {
4285                 GSList * fetchuid_list =
4286                         imap_uid_list_from_lep(lep_uidlist, NULL);
4287                 mailimap_search_result_free(lep_uidlist);
4288
4289                 uidlist = g_slist_concat(fetchuid_list, uidlist);
4290         } else {
4291                 carray * lep_uidtab;
4292                 if (r != -1) { /* inited */
4293                         imap_handle_error(SESSION(session), NULL, r);
4294                         if (is_fatal(r))
4295                                 return -1;
4296                 }
4297                 r = imap_threaded_fetch_uid(folder, 1,
4298                                     &lep_uidtab);
4299                 if (r == MAILIMAP_NO_ERROR) {
4300                         GSList * fetchuid_list =
4301                                 imap_uid_list_from_lep_tab(lep_uidtab);
4302                         imap_fetch_uid_list_free(lep_uidtab);
4303                         uidlist = g_slist_concat(fetchuid_list, uidlist);
4304                 }
4305         }
4306
4307         if (r != MAILIMAP_NO_ERROR) {
4308                 imap_handle_error(SESSION(session), NULL, r);
4309                 return -1;
4310         }
4311
4312         for (elem = uidlist; elem != NULL; elem = g_slist_next(elem)) {
4313                 guint msgnum;
4314
4315                 msgnum = GPOINTER_TO_INT(elem->data);
4316
4317                 *msgnum_list = g_slist_prepend(*msgnum_list, GINT_TO_POINTER(msgnum));
4318                 item->uid_list = g_slist_prepend(item->uid_list, GINT_TO_POINTER(msgnum));
4319                 nummsgs++;
4320         }
4321         g_slist_free(uidlist);
4322
4323         unlock_session(session); /* locked from imap_get_num_list */
4324
4325         return nummsgs;
4326
4327 }
4328
4329 gint imap_get_num_list(Folder *folder, FolderItem *_item, GSList **msgnum_list, gboolean *old_uids_valid)
4330 {
4331         IMAPFolderItem *item = (IMAPFolderItem *)_item;
4332         IMAPSession *session;
4333         gint nummsgs;
4334         GSList *uidlist = NULL;
4335         gchar *dir;
4336         gint known_list_len = 0;
4337         debug_print("get_num_list\n");
4338
4339         g_return_val_if_fail(folder != NULL, -1);
4340         g_return_val_if_fail(item != NULL, -1);
4341         g_return_val_if_fail(item->item.path != NULL, -1);
4342         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
4343         g_return_val_if_fail(folder->account != NULL, -1);
4344
4345         known_list_len = g_slist_length(item->uid_list);
4346         if (!item->should_update) {
4347                 debug_print("get_num_list: nothing to update\n");
4348                 *old_uids_valid = TRUE;
4349                 if (known_list_len == item->item.total_msgs
4350                  && known_list_len > 0) {
4351                         *msgnum_list = g_slist_copy(item->uid_list);
4352                         return known_list_len;
4353                 } else {
4354                         debug_print("don't know the list length...\n");
4355                 }
4356         }
4357
4358         if (prefs_common.work_offline &&
4359             !inc_offline_should_override(FALSE,
4360                 _("Claws Mail needs network access in order "
4361                   "to access the IMAP server."))) {
4362                 return -1;
4363         }
4364
4365         debug_print("getting session...\n");
4366         session = imap_session_get(folder);
4367         g_return_val_if_fail(session != NULL, -1);
4368
4369         lock_session(session); /* unlocked by get_list_of_uids */
4370         if (FOLDER_ITEM(item)->path)
4371                 statusbar_print_all(_("Scanning folder %s%c%s ..."),
4372                                       FOLDER_ITEM(item)->folder->name,
4373                                       G_DIR_SEPARATOR,
4374                                       FOLDER_ITEM(item)->path);
4375         else
4376                 statusbar_print_all(_("Scanning folder %s ..."),
4377                                       FOLDER_ITEM(item)->folder->name);
4378
4379         if (item->should_trash_cache) {
4380                 *old_uids_valid = FALSE;
4381                 debug_print("get_num_list: trashing num list\n");
4382                 debug_print("Freeing imap uid cache\n");
4383                 item->lastuid = 0;
4384                 g_slist_free(item->uid_list);
4385                 item->uid_list = NULL;
4386
4387                 imap_delete_all_cached_messages((FolderItem *)item);
4388         } else {
4389                 debug_print("get_num_list: updating num list\n");
4390                 *old_uids_valid = TRUE;
4391         }
4392
4393         nummsgs = get_list_of_uids(session, folder, item, &uidlist);
4394         /* session could be broken now, in case of fatal error */
4395
4396         debug_print("get_num_list: got %d msgs\n", nummsgs);
4397
4398         if (nummsgs < 0) {
4399                 statusbar_pop_all();
4400                 return -1;
4401         }
4402
4403         *msgnum_list = uidlist;
4404
4405         dir = folder_item_get_path((FolderItem *)item);
4406         debug_print("removing old messages from %s\n", dir);
4407         remove_numbered_files_not_in_list(dir, *msgnum_list);
4408         g_free(dir);
4409
4410         debug_print("get_num_list - ok - %i\n", nummsgs);
4411         statusbar_pop_all();
4412         item->should_trash_cache = FALSE;
4413         item->should_update = FALSE;
4414         return nummsgs;
4415 }
4416
4417 static MsgInfo *imap_parse_msg(const gchar *file, FolderItem *item)
4418 {
4419         MsgInfo *msginfo;
4420         MsgFlags flags;
4421
4422         flags.perm_flags = MSG_NEW|MSG_UNREAD;
4423         flags.tmp_flags = 0;
4424
4425         g_return_val_if_fail(item != NULL, NULL);
4426         g_return_val_if_fail(file != NULL, NULL);
4427
4428         if (folder_has_parent_of_type(item, F_QUEUE)) {
4429                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
4430         } else if (folder_has_parent_of_type(item, F_DRAFT)) {
4431                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
4432         }
4433
4434         msginfo = procheader_parse_file(file, flags, FALSE, FALSE);
4435         if (!msginfo) return NULL;
4436
4437         msginfo->plaintext_file = g_strdup(file);
4438         msginfo->folder = item;
4439
4440         return msginfo;
4441 }
4442
4443 GSList *imap_get_msginfos(Folder *folder, FolderItem *item,
4444                           GSList *msgnum_list)
4445 {
4446         IMAPSession *session;
4447         MsgInfoList *ret = NULL;
4448         gint ok;
4449
4450         debug_print("get_msginfos\n");
4451
4452         g_return_val_if_fail(folder != NULL, NULL);
4453         g_return_val_if_fail(item != NULL, NULL);
4454         g_return_val_if_fail(msgnum_list != NULL, NULL);
4455
4456         debug_print("getting session...\n");
4457         session = imap_session_get(folder);
4458         g_return_val_if_fail(session != NULL, NULL);
4459
4460         lock_session(session); /* unlocked later in the function */
4461
4462         debug_print("IMAP getting msginfos\n");
4463         ok = imap_select(session, IMAP_FOLDER(folder), item,
4464                          NULL, NULL, NULL, NULL, NULL, FALSE);
4465         if (ok != MAILIMAP_NO_ERROR) {
4466                 return NULL;
4467         }
4468         if (!(folder_has_parent_of_type(item, F_DRAFT) ||
4469               folder_has_parent_of_type(item, F_QUEUE))) {
4470                 ret = g_slist_concat(ret,
4471                         imap_get_uncached_messages(session, item,
4472                                                    msgnum_list, &ok));
4473                 if (ok != MAILIMAP_NO_ERROR)
4474                         return NULL;
4475                 unlock_session(session);
4476         } else {
4477                 MsgNumberList *sorted_list, *elem, *llast = NULL;
4478                 gint startnum, lastnum;
4479
4480                 unlock_session(session);
4481
4482                 sorted_list = g_slist_sort(g_slist_copy(msgnum_list), g_int_compare);
4483
4484                 startnum = lastnum = GPOINTER_TO_INT(sorted_list->data);
4485
4486                 llast = g_slist_last(ret);
4487                 for (elem = sorted_list;; elem = g_slist_next(elem)) {
4488                         guint num = 0;
4489
4490                         if (elem)
4491                                 num = GPOINTER_TO_INT(elem->data);
4492
4493                         if (num > lastnum + 1 || elem == NULL) {
4494                                 int i;
4495                                 for (i = startnum; i <= lastnum; ++i) {
4496                                         gchar *file;
4497                                         file = imap_fetch_msg(folder, item, i);
4498                                         if (file != NULL) {
4499                                                 MsgInfo *msginfo = imap_parse_msg(file, item);
4500                                                 if (msginfo != NULL) {
4501                                                         msginfo->msgnum = i;
4502                                                         if (llast == NULL)
4503                                                                 llast = ret = g_slist_append(ret, msginfo);
4504                                                         else {
4505                                                                 llast = g_slist_append(llast, msginfo);
4506                                                                 llast = llast->next;
4507                                                         }
4508                                                 }
4509                                                 g_free(file);
4510                                         }
4511                                 }
4512
4513                                 if (elem == NULL)
4514                                         break;
4515
4516                                 startnum = num;
4517                         }
4518                         lastnum = num;
4519                 }
4520
4521                 g_slist_free(sorted_list);
4522         }
4523         return ret;
4524 }
4525
4526 MsgInfo *imap_get_msginfo(Folder *folder, FolderItem *item, gint uid)
4527 {
4528         MsgInfo *msginfo = NULL;
4529         MsgInfoList *msginfolist;
4530         MsgNumberList numlist;
4531
4532         numlist.next = NULL;
4533         numlist.data = GINT_TO_POINTER(uid);
4534
4535         msginfolist = imap_get_msginfos(folder, item, &numlist);
4536         if (msginfolist != NULL) {
4537                 msginfo = msginfolist->data;
4538                 g_slist_free(msginfolist);
4539         }
4540
4541         return msginfo;
4542 }
4543
4544 gboolean imap_scan_required(Folder *folder, FolderItem *_item)
4545 {
4546         IMAPSession *session;
4547         IMAPFolderItem *item = (IMAPFolderItem *)_item;
4548         gint ok, exists = 0, unseen = 0;
4549         guint32 uid_next = 0, uid_val = 0;
4550         gboolean selected_folder;
4551
4552         g_return_val_if_fail(folder != NULL, FALSE);
4553         g_return_val_if_fail(item != NULL, FALSE);
4554         g_return_val_if_fail(item->item.folder != NULL, FALSE);
4555         g_return_val_if_fail(FOLDER_CLASS(item->item.folder) == &imap_class, FALSE);
4556
4557         if (item->item.path == NULL)
4558                 return FALSE;
4559
4560         if (item->should_update) {
4561                 debug_print("scan already required\n");
4562                 return TRUE;
4563         }
4564         debug_print("getting session...\n");
4565         session = imap_session_get(folder);
4566
4567         g_return_val_if_fail(session != NULL, FALSE);
4568         lock_session(session); /* unlocked later in the function */
4569
4570         selected_folder = (session->mbox != NULL) &&
4571                           (!strcmp(session->mbox, item->item.path));
4572         if (selected_folder) {
4573                 if (!session->folder_content_changed) {
4574                         ok = imap_cmd_noop(session);
4575                         if (ok != MAILIMAP_NO_ERROR) {
4576                                 debug_print("disconnected!\n");
4577                                 if (!is_fatal(ok))
4578                                         session = imap_reconnect_if_possible(folder, session);
4579                                 else
4580                                         session = imap_session_get(folder);
4581                                 if (session == NULL)
4582                                         return FALSE;
4583                         }
4584
4585                         if (session->folder_content_changed) {
4586                                 debug_print("CHANGED (self-noop)! scan_required\n");
4587                                 item->should_update = TRUE;
4588                                 if (session->uid_validity && session->uid_validity != item->item.mtime) {
4589                                         item->item.mtime = session->uid_validity;
4590                                         item->should_trash_cache = TRUE;
4591                                 }
4592                                 unlock_session(session);
4593                                 return TRUE;
4594                         }
4595                 } else {
4596                         debug_print("CHANGED (previous noop)! scan_required\n");
4597                         item->should_update = TRUE;
4598                         if (session->uid_validity && session->uid_validity != item->item.mtime) {
4599                                 item->item.mtime = session->uid_validity;
4600                                 item->should_trash_cache = TRUE;
4601                         }
4602                         unlock_session(session);
4603                         return TRUE;
4604                 }
4605         } else {
4606                 ok = imap_status(session, IMAP_FOLDER(folder), item->item.path, IMAP_FOLDER_ITEM(item),
4607                                  &exists, &uid_next, &uid_val, &unseen, FALSE);
4608                 if (ok != MAILIMAP_NO_ERROR) {
4609                         return FALSE;
4610                 }
4611
4612                 debug_print("exists %d, item->item.total_msgs %d\n",
4613                         exists, item->item.total_msgs);
4614                 if (exists != item->item.total_msgs
4615                     || unseen != item->item.unread_msgs
4616                     || uid_next != item->uid_next
4617                     || uid_val != item->item.mtime) {
4618                         debug_print("CHANGED (status)! scan_required\n");
4619                         item->last_change = time(NULL);
4620                         item->should_update = TRUE;
4621                         item->uid_next = uid_next;
4622                         if (uid_val != item->item.mtime) {
4623                                 item->item.mtime = uid_val;
4624                                 item->should_trash_cache = TRUE;
4625                         }
4626                         unlock_session(session);
4627                         return TRUE;
4628                 }
4629         }
4630         unlock_session(session);
4631
4632         item->should_update = FALSE;
4633         return FALSE;
4634 }
4635
4636 void imap_change_flags(Folder *folder, FolderItem *item, MsgInfo *msginfo, MsgPermFlags newflags)
4637 {
4638         IMAPSession *session;
4639         IMAPFlags flags_set = 0, flags_unset = 0;
4640         gint ok = MAILIMAP_NO_ERROR;
4641         MsgNumberList numlist;
4642         hashtable_data *ht_data = NULL;
4643
4644         g_return_if_fail(folder != NULL);
4645         g_return_if_fail(folder->klass == &imap_class);
4646         g_return_if_fail(item != NULL);
4647         g_return_if_fail(item->folder == folder);
4648         g_return_if_fail(msginfo != NULL);
4649         g_return_if_fail(msginfo->folder == item);
4650
4651         if (!MSG_IS_MARKED(msginfo->flags) &&  (newflags & MSG_MARKED))
4652                 flags_set |= IMAP_FLAG_FLAGGED;
4653         if ( MSG_IS_MARKED(msginfo->flags) && !(newflags & MSG_MARKED))
4654                 flags_unset |= IMAP_FLAG_FLAGGED;
4655
4656         if (!MSG_IS_UNREAD(msginfo->flags) &&  (newflags & MSG_UNREAD))
4657                 flags_unset |= IMAP_FLAG_SEEN;
4658         if ( MSG_IS_UNREAD(msginfo->flags) && !(newflags & MSG_UNREAD))
4659                 flags_set |= IMAP_FLAG_SEEN;
4660
4661         if (!MSG_IS_REPLIED(msginfo->flags) &&  (newflags & MSG_REPLIED))
4662                 flags_set |= IMAP_FLAG_ANSWERED;
4663         if ( MSG_IS_REPLIED(msginfo->flags) && !(newflags & MSG_REPLIED))
4664                 flags_unset |= IMAP_FLAG_ANSWERED;
4665
4666         if (!MSG_IS_FORWARDED(msginfo->flags) &&  (newflags & MSG_FORWARDED))
4667                 flags_set |= IMAP_FLAG_FORWARDED;
4668         if ( MSG_IS_FORWARDED(msginfo->flags) && !(newflags & MSG_FORWARDED))
4669                 flags_unset |= IMAP_FLAG_FORWARDED;
4670
4671         if (!MSG_IS_SPAM(msginfo->flags) &&  (newflags & MSG_SPAM)) {
4672                 flags_set |= IMAP_FLAG_SPAM;
4673                 flags_unset |= IMAP_FLAG_HAM;
4674         }
4675         if ( MSG_IS_SPAM(msginfo->flags) && !(newflags & MSG_SPAM)) {
4676                 flags_set |= IMAP_FLAG_HAM;
4677                 flags_unset |= IMAP_FLAG_SPAM;
4678         }
4679         if (!MSG_IS_DELETED(msginfo->flags) &&  (newflags & MSG_DELETED))
4680                 flags_set |= IMAP_FLAG_DELETED;
4681         if ( MSG_IS_DELETED(msginfo->flags) && !(newflags & MSG_DELETED))
4682                 flags_unset |= IMAP_FLAG_DELETED;
4683
4684         if (!flags_set && !flags_unset) {
4685                 /* the changed flags were not translatable to IMAP-speak.
4686                  * like MSG_POSTFILTERED, so just apply. */
4687                 msginfo->flags.perm_flags = newflags;
4688                 return;
4689         }
4690
4691         debug_print("getting session...\n");
4692         session = imap_session_get(folder);
4693         if (!session) {
4694                 return;
4695         }
4696
4697         if ((ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
4698             NULL, NULL, NULL, NULL, NULL, FALSE)) != MAILIMAP_NO_ERROR) {
4699                 return;
4700         }
4701         numlist.next = NULL;
4702         numlist.data = GINT_TO_POINTER(msginfo->msgnum);
4703
4704         if (IMAP_FOLDER_ITEM(item)->batching) {
4705                 /* instead of performing an UID STORE command for each message change,
4706                  * as a lot of them can change "together", we just fill in hashtables
4707                  * and defer the treatment so that we're able to send only one
4708                  * command.
4709                  */
4710                 debug_print("IMAP batch mode on, deferring flags change\n");
4711                 if (flags_set) {
4712                         ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->flags_set_table,
4713                                 GINT_TO_POINTER(flags_set));
4714                         if (ht_data == NULL) {
4715                                 ht_data = g_new0(hashtable_data, 1);
4716                                 ht_data->item = IMAP_FOLDER_ITEM(item);
4717                                 g_hash_table_insert(IMAP_FOLDER_ITEM(item)->flags_set_table,
4718                                         GINT_TO_POINTER(flags_set), ht_data);
4719                         }
4720                         ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
4721                 }
4722                 if (flags_unset) {
4723                         ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->flags_unset_table,
4724                                 GINT_TO_POINTER(flags_unset));
4725                         if (ht_data == NULL) {
4726                                 ht_data = g_new0(hashtable_data, 1);
4727                                 ht_data->item = IMAP_FOLDER_ITEM(item);
4728                                 g_hash_table_insert(IMAP_FOLDER_ITEM(item)->flags_unset_table,
4729                                         GINT_TO_POINTER(flags_unset), ht_data);
4730                         }
4731                         ht_data->msglist = g_slist_prepend(ht_data->msglist,
4732                                         GINT_TO_POINTER(msginfo->msgnum));
4733                 }
4734         } else {
4735                 debug_print("IMAP changing flags\n");
4736                 if (flags_set) {
4737                         ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item), &numlist, flags_set, NULL, TRUE);
4738                         if (ok != MAILIMAP_NO_ERROR) {
4739                                 return;
4740                         }
4741                 }
4742
4743                 if (flags_unset) {
4744                         ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item), &numlist, flags_unset, NULL, FALSE);
4745                         if (ok != MAILIMAP_NO_ERROR) {
4746                                 return;
4747                         }
4748                 }
4749         }
4750         msginfo->flags.perm_flags = newflags;
4751         return;
4752 }
4753
4754 static gint imap_remove_msg(Folder *folder, FolderItem *item, gint uid)
4755 {
4756         gint ok;
4757         IMAPSession *session;
4758         gchar *dir;
4759         MsgNumberList numlist;
4760
4761         g_return_val_if_fail(folder != NULL, -1);
4762         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
4763         g_return_val_if_fail(item != NULL, -1);
4764
4765         debug_print("getting session...\n");
4766         session = imap_session_get(folder);
4767         if (!session) return -1;
4768
4769         ok = imap_select(session, IMAP_FOLDER(folder), item,
4770                          NULL, NULL, NULL, NULL, NULL, FALSE);
4771         if (ok != MAILIMAP_NO_ERROR) {
4772                 return ok;
4773         }
4774         numlist.next = NULL;
4775         numlist.data = GINT_TO_POINTER(uid);
4776
4777         ok = imap_set_message_flags
4778                 (session, IMAP_FOLDER_ITEM(item), &numlist, IMAP_FLAG_DELETED, NULL, TRUE);
4779         if (ok != MAILIMAP_NO_ERROR) {
4780                 log_warning(LOG_PROTOCOL, _("can't set deleted flags: %d\n"), uid);
4781                 return ok;
4782         }
4783
4784         ok = imap_cmd_expunge(session, folder->account->imap_use_trash);
4785
4786         if (ok != MAILIMAP_NO_ERROR) {
4787                 log_warning(LOG_PROTOCOL, _("can't expunge\n"));
4788                 return ok;
4789         }
4790
4791         IMAP_FOLDER_ITEM(item)->uid_list = g_slist_remove(
4792             IMAP_FOLDER_ITEM(item)->uid_list, numlist.data);
4793         dir = folder_item_get_path(item);
4794         if (is_dir_exist(dir))
4795                 remove_numbered_files(dir, uid, uid);
4796         g_free(dir);
4797         return MAILIMAP_NO_ERROR;
4798 }
4799
4800 static gint compare_msginfo(gconstpointer a, gconstpointer b)
4801 {
4802         return ((MsgInfo *)a)->msgnum - ((MsgInfo *)b)->msgnum;
4803 }
4804
4805 static guint gslist_find_next_num(MsgNumberList **list, guint num)
4806 {
4807         GSList *elem;
4808
4809         g_return_val_if_fail(list != NULL, -1);
4810
4811         for (elem = *list; elem != NULL; elem = g_slist_next(elem))
4812                 if (GPOINTER_TO_INT(elem->data) >= num)
4813                         break;
4814         *list = elem;
4815         return elem != NULL ? GPOINTER_TO_INT(elem->data) : (gint)-1;
4816 }
4817
4818 static gboolean flag_ok(IMAPFolderItem *item, guint flag)
4819 {
4820         if (item->ok_flags && g_slist_find(item->ok_flags, GUINT_TO_POINTER(flag))) {
4821                 debug_print("flag %d is OK\n", flag);
4822                 return TRUE;
4823         }
4824         if (item->can_create_flags == ITEM_CAN_CREATE_FLAGS) {
4825                 debug_print("creating flags is OK\n");
4826                 return TRUE;
4827         }
4828         return FALSE;
4829 }
4830
4831 /*
4832  * NEW and DELETED flags are not syncronized
4833  * - The NEW/RECENT flags in IMAP folders can not really be directly
4834  *   modified by Sylpheed
4835  * - The DELETE/DELETED flag in IMAP and Sylpheed don't have the same
4836  *   meaning, in IMAP it always removes the messages from the FolderItem
4837  *   in Sylpheed it can mean to move the message to trash
4838  */
4839
4840 typedef struct _get_flags_data {
4841         Folder *folder;
4842         FolderItem *item;
4843         MsgInfoList *msginfo_list;
4844         GHashTable *msgflags;
4845         gboolean full_search;
4846         gboolean done;
4847 } get_flags_data;
4848
4849 static /*gint*/ void *imap_get_flags_thread(void *data)
4850 {
4851         get_flags_data *stuff = (get_flags_data *)data;
4852         Folder *folder = stuff->folder;
4853         FolderItem *fitem = (FolderItem *) stuff->item;
4854         MsgInfoList *msginfo_list = stuff->msginfo_list;
4855         GHashTable *msgflags = stuff->msgflags;
4856         GSList *elem;
4857         carray * lep_uidtab;
4858         IMAPSession *session;
4859         gint ok;
4860         int r = MAILIMAP_NO_ERROR;
4861         GHashTable *flags_hash = NULL;
4862         GHashTable *tags_hash = NULL;
4863         gboolean full_search = stuff->full_search;
4864         GSList *sorted_list = NULL;
4865         GSList *unseen = NULL, *answered = NULL, *flagged = NULL, *deleted = NULL, *forwarded = NULL, *spam = NULL;
4866         GSList *seq_list, *cur;
4867         gboolean reverse_seen = FALSE;
4868         gboolean selected_folder;
4869         gint exists_cnt, unseen_cnt;
4870         gboolean got_alien_tags = FALSE;
4871
4872         session = imap_session_get(folder);
4873
4874         if (session == NULL) {
4875                 stuff->done = TRUE;
4876                 return GINT_TO_POINTER(-1);
4877         }
4878         selected_folder = (session->mbox != NULL) &&
4879                           (!strcmp(session->mbox, fitem->path));
4880
4881         lock_session(session);
4882         if (!selected_folder) {
4883                 ok = imap_select(session, IMAP_FOLDER(folder), fitem,
4884                         &exists_cnt, NULL, &unseen_cnt, NULL, NULL, TRUE);
4885                 if (ok != MAILIMAP_NO_ERROR) {
4886                         stuff->done = TRUE;
4887                         return GINT_TO_POINTER(-1);
4888                 }
4889
4890                 if (unseen_cnt > exists_cnt / 2)
4891                         reverse_seen = TRUE;
4892         }
4893         else {
4894                 if (fitem->unread_msgs > fitem->total_msgs / 2)
4895                         reverse_seen = TRUE;
4896         }
4897
4898         sorted_list = g_slist_sort(g_slist_copy(msginfo_list), compare_msginfo);
4899         if (!full_search) {
4900                 seq_list = imap_get_lep_set_from_msglist(IMAP_FOLDER(folder), msginfo_list);
4901         } else {
4902                 struct mailimap_set * set;
4903                 set = mailimap_set_new_interval(1, 0);
4904                 seq_list = g_slist_append(NULL, set);
4905         }
4906
4907         if (folder->account && folder->account->low_bandwidth) {
4908                 for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
4909                         struct mailimap_set * imapset;
4910                         clist * lep_uidlist;
4911                         int r;
4912
4913                         imapset = cur->data;
4914                         if (reverse_seen) {
4915                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SEEN, NULL,
4916                                                          full_search ? NULL:imapset, &lep_uidlist);
4917                         }
4918                         else {
4919                                 r = imap_threaded_search(folder,
4920                                                          IMAP_SEARCH_TYPE_UNSEEN, NULL,
4921                                                          full_search ? NULL:imapset, &lep_uidlist);
4922                         }
4923                         if (r == MAILIMAP_NO_ERROR) {
4924                                 GSList * uidlist;
4925
4926                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
4927                                 mailimap_search_result_free(lep_uidlist);
4928
4929                                 unseen = g_slist_concat(unseen, uidlist);
4930                         } else {
4931                                 imap_handle_error(SESSION(session), NULL, r);
4932                                 goto bail;
4933                         }
4934
4935                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_FLAGGED, NULL,
4936                                                  full_search ? NULL:imapset, &lep_uidlist);
4937                         if (r == MAILIMAP_NO_ERROR) {
4938                                 GSList * uidlist;
4939
4940                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
4941                                 mailimap_search_result_free(lep_uidlist);
4942
4943                                 flagged = g_slist_concat(flagged, uidlist);
4944                         } else {
4945                                 imap_handle_error(SESSION(session), NULL, r);
4946                                 goto bail;
4947                         }
4948
4949                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
4950                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_ANSWERED, NULL,
4951                                                          full_search ? NULL:imapset, &lep_uidlist);
4952                                 if (r == MAILIMAP_NO_ERROR) {
4953                                         GSList * uidlist;
4954
4955                                         uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
4956                                         mailimap_search_result_free(lep_uidlist);
4957
4958                                         answered = g_slist_concat(answered, uidlist);
4959                                 } else {
4960                                         imap_handle_error(SESSION(session), NULL, r);
4961                                         goto bail;
4962                                 }
4963
4964                                 if (flag_ok(IMAP_FOLDER_ITEM(fitem), IMAP_FLAG_FORWARDED)) {
4965                                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_FORWARDED, NULL,
4966                                                                  full_search ? NULL:imapset, &lep_uidlist);
4967                                         if (r == MAILIMAP_NO_ERROR) {
4968                                                 GSList * uidlist;
4969
4970                                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
4971                                                 mailimap_search_result_free(lep_uidlist);
4972
4973                                                 forwarded = g_slist_concat(forwarded, uidlist);
4974                                         } else {
4975                                                 imap_handle_error(SESSION(session), NULL, r);
4976                                                 goto bail;
4977                                         }
4978                                 }
4979
4980                                 if (flag_ok(IMAP_FOLDER_ITEM(fitem), IMAP_FLAG_SPAM)) {
4981                                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SPAM, NULL,
4982                                                                  full_search ? NULL:imapset, &lep_uidlist);
4983                                         if (r == MAILIMAP_NO_ERROR) {
4984                                                 GSList * uidlist;
4985
4986                                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
4987                                                 mailimap_search_result_free(lep_uidlist);
4988
4989                                                 spam = g_slist_concat(spam, uidlist);
4990                                         } else {
4991                                                 imap_handle_error(SESSION(session), NULL, r);
4992                                                 goto bail;
4993                                         }
4994                                 }
4995
4996                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_DELETED, NULL,
4997                                                          full_search ? NULL:imapset, &lep_uidlist);
4998                                 if (r == MAILIMAP_NO_ERROR) {
4999                                         GSList * uidlist;
5000
5001                                         uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5002                                         mailimap_search_result_free(lep_uidlist);
5003
5004                                         deleted = g_slist_concat(deleted, uidlist);
5005                                 } else {
5006                                         imap_handle_error(SESSION(session), NULL, r);
5007                                         goto bail;
5008                                 }
5009                         }
5010                 }
5011
5012         } else {
5013                 r = imap_threaded_fetch_uid_flags(folder, 1, &lep_uidtab);
5014                 if (r == MAILIMAP_NO_ERROR) {
5015                         flags_hash = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, NULL);
5016                         tags_hash = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, NULL);
5017                         imap_flags_hash_from_lep_uid_flags_tab(lep_uidtab, flags_hash, tags_hash);
5018                         imap_fetch_uid_flags_list_free(lep_uidtab);
5019                 } else {
5020                         imap_handle_error(SESSION(session), NULL, r);
5021                         goto bail;
5022                 }
5023         }
5024
5025 bail:
5026         if (r == MAILIMAP_NO_ERROR)
5027                 unlock_session(session);
5028
5029         for (elem = sorted_list; elem != NULL; elem = g_slist_next(elem)) {
5030                 MsgInfo *msginfo;
5031                 MsgPermFlags flags, oldflags;
5032                 gboolean wasnew;
5033
5034                 msginfo = (MsgInfo *) elem->data;
5035                 flags = msginfo->flags.perm_flags;
5036                 wasnew = (flags & MSG_NEW);
5037                 oldflags = flags & ~(MSG_NEW|MSG_UNREAD|MSG_REPLIED|MSG_FORWARDED|MSG_MARKED|MSG_DELETED|MSG_SPAM);
5038
5039                 if (folder->account && folder->account->low_bandwidth) {
5040                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
5041                                 flags &= ~((reverse_seen ? 0 : MSG_UNREAD | MSG_NEW) | MSG_REPLIED | MSG_FORWARDED | MSG_MARKED | MSG_SPAM);
5042                         } else {
5043                                 flags &= ~((reverse_seen ? 0 : MSG_UNREAD | MSG_NEW | MSG_MARKED));
5044                         }
5045                         if (reverse_seen)
5046                                 flags |= MSG_UNREAD | (wasnew ? MSG_NEW : 0);
5047                         if (gslist_find_next_num(&unseen, msginfo->msgnum) == msginfo->msgnum) {
5048                                 if (!reverse_seen) {
5049                                         flags |= MSG_UNREAD | (wasnew ? MSG_NEW : 0);
5050                                 } else {
5051                                         flags &= ~(MSG_UNREAD | MSG_NEW);
5052                                 }
5053                         }
5054
5055                         if (gslist_find_next_num(&flagged, msginfo->msgnum) == msginfo->msgnum)
5056                                 flags |= MSG_MARKED;
5057                         else
5058                                 flags &= ~MSG_MARKED;
5059
5060                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
5061                                 if (gslist_find_next_num(&answered, msginfo->msgnum) == msginfo->msgnum)
5062                                         flags |= MSG_REPLIED;
5063                                 else
5064                                         flags &= ~MSG_REPLIED;
5065                                 if (gslist_find_next_num(&forwarded, msginfo->msgnum) == msginfo->msgnum)
5066                                         flags |= MSG_FORWARDED;
5067                                 else
5068                                         flags &= ~MSG_FORWARDED;
5069                                 if (gslist_find_next_num(&spam, msginfo->msgnum) == msginfo->msgnum)
5070                                         flags |= MSG_SPAM;
5071                                 else
5072                                         flags &= ~MSG_SPAM;
5073                                 if (gslist_find_next_num(&deleted, msginfo->msgnum) == msginfo->msgnum)
5074                                         flags |= MSG_DELETED;
5075                                 else
5076                                         flags &= ~MSG_DELETED;
5077                         }
5078                 } else {
5079                         if (flags_hash != NULL) {
5080
5081                                 flags = GPOINTER_TO_INT(g_hash_table_lookup(flags_hash,
5082                                                 GINT_TO_POINTER(msginfo->msgnum)));
5083                         }
5084
5085                         if ((flags & MSG_UNREAD) == 0)
5086                                 flags &= ~MSG_NEW;
5087                         else if (wasnew)
5088                                 flags |= MSG_NEW;
5089                         flags |= oldflags;
5090
5091                         if (tags_hash != NULL) {
5092                                 GSList *tags = g_hash_table_lookup(tags_hash, GINT_TO_POINTER(msginfo->msgnum));
5093                                 GSList *cur;
5094
5095                                 g_slist_free(msginfo->tags);
5096                                 msginfo->tags = NULL;
5097
5098                                 for (cur = tags; cur; cur = cur->next) {
5099                                         gchar *real_tag = imap_modified_utf7_to_utf8(cur->data, TRUE);
5100                                         gint id = 0;
5101                                         id = tags_get_id_for_str(real_tag);
5102                                         if (id == -1) {
5103                                                 id = tags_add_tag(real_tag);
5104                                                 got_alien_tags = TRUE;
5105                                         }
5106                                         msginfo->tags = g_slist_append(
5107                                                                 msginfo->tags,
5108                                                                 GINT_TO_POINTER(id));
5109                                         g_free(real_tag);
5110                                 }
5111                                 slist_free_strings_full(tags);
5112                         }
5113                 }
5114
5115                 g_hash_table_insert(msgflags, msginfo, GINT_TO_POINTER(flags));
5116         }
5117
5118         if (got_alien_tags) {
5119                 tags_write_tags();
5120                 main_window_reflect_tags_changes(mainwindow_get_mainwindow());
5121         }
5122
5123         if (flags_hash)
5124                 g_hash_table_destroy(flags_hash);
5125         if (tags_hash)
5126                 g_hash_table_destroy(tags_hash);
5127
5128         imap_lep_set_free(seq_list);
5129         g_slist_free(flagged);
5130         g_slist_free(deleted);
5131         g_slist_free(answered);
5132         g_slist_free(forwarded);
5133         g_slist_free(spam);
5134         g_slist_free(unseen);
5135         g_slist_free(sorted_list);
5136
5137         stuff->done = TRUE;
5138         return GINT_TO_POINTER(0);
5139 }
5140
5141 static gint imap_get_flags(Folder *folder, FolderItem *item,
5142                            MsgInfoList *msginfo_list, GHashTable *msgflags)
5143 {
5144         gint result;
5145         get_flags_data *data = g_new0(get_flags_data, 1);
5146         data->done = FALSE;
5147         data->folder = folder;
5148         data->item = item;
5149         data->msginfo_list = msginfo_list;
5150         data->msgflags = msgflags;
5151         data->full_search = FALSE;
5152
5153         GSList *tmp = NULL, *cur;
5154
5155         if (prefs_common.work_offline &&
5156             !inc_offline_should_override(FALSE,
5157                 _("Claws Mail needs network access in order "
5158                   "to access the IMAP server."))) {
5159                 g_free(data);
5160                 return -1;
5161         }
5162
5163         tmp = folder_item_get_msg_list(item);
5164
5165         if (g_slist_length(tmp) <= g_slist_length(msginfo_list))
5166                 data->full_search = TRUE;
5167
5168         for (cur = tmp; cur; cur = cur->next)
5169                 procmsg_msginfo_free((MsgInfo *)cur->data);
5170
5171         g_slist_free(tmp);
5172
5173         result = GPOINTER_TO_INT(imap_get_flags_thread(data));
5174
5175         g_free(data);
5176         return result;
5177
5178 }
5179
5180 static gboolean process_flags(gpointer key, gpointer value, gpointer user_data)
5181 {
5182         gboolean flags_set = GPOINTER_TO_INT(user_data);
5183         gint flags_value = GPOINTER_TO_INT(key);
5184         hashtable_data *data = (hashtable_data *)value;
5185         IMAPFolderItem *_item = data->item;
5186         FolderItem *item = (FolderItem *)_item;
5187         gint ok = MAILIMAP_ERROR_BAD_STATE;
5188         IMAPSession *session = NULL;
5189
5190         debug_print("getting session...\n");
5191         session = imap_session_get(item->folder);
5192
5193         data->msglist = g_slist_reverse(data->msglist);
5194
5195         debug_print("IMAP %ssetting flags to %d for %d messages\n",
5196                 flags_set?"":"un",
5197                 flags_value,
5198                 g_slist_length(data->msglist));
5199
5200         lock_session(session);
5201         if (session) {
5202                 ok = imap_select(session, IMAP_FOLDER(item->folder), item,
5203                          NULL, NULL, NULL, NULL, NULL, FALSE);
5204         }
5205         if (ok == MAILIMAP_NO_ERROR) {
5206                 ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item),
5207                         data->msglist, flags_value, NULL, flags_set);
5208         } else {
5209                 g_warning("can't select mailbox %s\n", item->path);
5210         }
5211
5212         if (!is_fatal(ok))
5213                 unlock_session(session);
5214
5215         g_slist_free(data->msglist);
5216         g_free(data);
5217         return TRUE;
5218 }
5219
5220 static gboolean process_tags(gpointer key, gpointer value, gpointer user_data)
5221 {
5222         gboolean tags_set = GPOINTER_TO_INT(user_data);
5223         TagsData *data = (TagsData *)value;
5224         IMAPFolderItem *_item = data->item;
5225         FolderItem *item = (FolderItem *)_item;
5226         gchar *str = data->str;
5227         gint ok = MAILIMAP_ERROR_BAD_STATE;
5228         IMAPSession *session = NULL;
5229
5230         debug_print("getting session...\n");
5231         session = imap_session_get(item->folder);
5232
5233         data->msglist = g_slist_reverse(data->msglist);
5234
5235         debug_print("IMAP %ssetting tags %s for %d messages\n",
5236                 tags_set?"":"un",
5237                 str,
5238                 g_slist_length(data->msglist));
5239
5240         lock_session(session);
5241         if (session) {
5242                 ok = imap_select(session, IMAP_FOLDER(item->folder), item,
5243                          NULL, NULL, NULL, NULL, NULL, FALSE);
5244         }
5245         if (ok == MAILIMAP_NO_ERROR) {
5246                 GSList list;
5247                 list.data = str;
5248                 list.next = NULL;
5249                 ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item),
5250                         data->msglist, 0, &list, tags_set);
5251         } else {
5252                 g_warning("can't select mailbox %s\n", item->path);
5253         }
5254
5255         if (!is_fatal(ok))
5256                 unlock_session(session);
5257
5258         g_slist_free(data->msglist);
5259         g_free(data->str);
5260         g_free(data);
5261         return TRUE;
5262 }
5263
5264 static void process_hashtable(IMAPFolderItem *item)
5265 {
5266         if (item->flags_set_table) {
5267                 g_hash_table_foreach_remove(item->flags_set_table, process_flags, GINT_TO_POINTER(TRUE));
5268                 g_hash_table_destroy(item->flags_set_table);
5269                 item->flags_set_table = NULL;
5270         }
5271         if (item->flags_unset_table) {
5272                 g_hash_table_foreach_remove(item->flags_unset_table, process_flags, GINT_TO_POINTER(FALSE));
5273                 g_hash_table_destroy(item->flags_unset_table);
5274                 item->flags_unset_table = NULL;
5275         }
5276         if (item->tags_set_table) {
5277                 g_hash_table_foreach_remove(item->tags_set_table, process_tags, GINT_TO_POINTER(TRUE));
5278                 g_hash_table_destroy(item->tags_set_table);
5279                 item->tags_set_table = NULL;
5280         }
5281         if (item->tags_unset_table) {
5282                 g_hash_table_foreach_remove(item->tags_unset_table, process_tags, GINT_TO_POINTER(FALSE));
5283                 g_hash_table_destroy(item->tags_unset_table);
5284                 item->tags_unset_table = NULL;
5285         }
5286
5287 }
5288
5289 static void imap_set_batch (Folder *folder, FolderItem *_item, gboolean batch)
5290 {
5291         IMAPFolderItem *item = (IMAPFolderItem *)_item;
5292         IMAPSession *session;
5293
5294         g_return_if_fail(item != NULL);
5295
5296         if (item->batching == batch)
5297                 return;
5298
5299         if (batch) {
5300                 item->batching = TRUE;
5301                 debug_print("IMAP switching to batch mode\n");
5302                 if (!item->flags_set_table) {
5303                         item->flags_set_table = g_hash_table_new(NULL, g_direct_equal);
5304                 }
5305                 if (!item->flags_unset_table) {
5306                         item->flags_unset_table = g_hash_table_new(NULL, g_direct_equal);
5307                 }
5308                 if (!item->tags_set_table) {
5309                         item->tags_set_table = g_hash_table_new(NULL, g_direct_equal);
5310                 }
5311                 if (!item->tags_unset_table) {
5312                         item->tags_unset_table = g_hash_table_new(NULL, g_direct_equal);
5313                 }
5314                 session = imap_session_get(folder);
5315                 if (session) {
5316                         imap_refresh_sensitivity(session);
5317                         session->sens_update_block = TRUE;
5318                 }
5319         } else {
5320                 debug_print("IMAP switching away from batch mode\n");
5321                 /* process stuff */
5322                 process_hashtable(item);
5323                 item->batching = FALSE;
5324                 session = imap_session_get(folder);
5325                 if (session) {
5326                         session->sens_update_block = FALSE;
5327                         imap_refresh_sensitivity(session);
5328                 }
5329         }
5330 }
5331
5332
5333
5334 /* data types conversion libetpan <-> claws */
5335
5336
5337
5338 #define ETPAN_IMAP_MB_MARKED      1
5339 #define ETPAN_IMAP_MB_UNMARKED    2
5340 #define ETPAN_IMAP_MB_NOSELECT    4
5341 #define ETPAN_IMAP_MB_NOINFERIORS 8
5342
5343 static int imap_flags_to_flags(struct mailimap_mbx_list_flags * imap_flags)
5344 {
5345   int flags;
5346   clistiter * cur;
5347
5348   flags = 0;
5349   if (imap_flags->mbf_type == MAILIMAP_MBX_LIST_FLAGS_SFLAG) {
5350     switch (imap_flags->mbf_sflag) {
5351     case MAILIMAP_MBX_LIST_SFLAG_MARKED:
5352       flags |= ETPAN_IMAP_MB_MARKED;
5353       break;
5354     case MAILIMAP_MBX_LIST_SFLAG_NOSELECT:
5355       flags |= ETPAN_IMAP_MB_NOSELECT;
5356       break;
5357     case MAILIMAP_MBX_LIST_SFLAG_UNMARKED:
5358       flags |= ETPAN_IMAP_MB_UNMARKED;
5359       break;
5360     }
5361   }
5362
5363   if (imap_flags->mbf_oflags) {
5364     for(cur = clist_begin(imap_flags->mbf_oflags) ; cur != NULL ;
5365         cur = clist_next(cur)) {
5366       struct mailimap_mbx_list_oflag * oflag;
5367
5368       oflag = clist_content(cur);
5369
5370       switch (oflag->of_type) {
5371       case MAILIMAP_MBX_LIST_OFLAG_NOINFERIORS:
5372         flags |= ETPAN_IMAP_MB_NOINFERIORS;
5373         break;
5374       }
5375     }
5376   }
5377   return flags;
5378 }
5379
5380 static GSList * imap_list_from_lep(IMAPFolder * folder,
5381                                    clist * list, const gchar * real_path, gboolean all)
5382 {
5383         clistiter * iter;
5384         GSList * item_list = NULL, *llast = NULL;
5385
5386         if (list) {
5387                 for(iter = clist_begin(list) ; iter != NULL ;
5388                     iter = clist_next(iter)) {
5389                         struct mailimap_mailbox_list * mb;
5390                         int flags;
5391                         char delimiter;
5392                         char * name;
5393                         char * dup_name;
5394                         gchar * base;
5395                         gchar * loc_name;
5396                         gchar * loc_path;
5397                         FolderItem *new_item;
5398
5399                         mb = clist_content(iter);
5400
5401                         if (mb == NULL)
5402                                 continue;
5403
5404                         flags = 0;
5405                         if (mb->mb_flag != NULL)
5406                                 flags = imap_flags_to_flags(mb->mb_flag);
5407
5408                         delimiter = mb->mb_delimiter;
5409                         name = mb->mb_name;
5410
5411                         dup_name = strdup(name);
5412                         if (delimiter != '\0')
5413                                 subst_char(dup_name, delimiter, '/');
5414
5415                         base = g_path_get_basename(dup_name);
5416                         if (base[0] == '.') {
5417                                 g_free(base);
5418                                 free(dup_name);
5419                                 continue;
5420                         }
5421                         if (!all && path_cmp(name, real_path) == 0) {
5422                                 g_free(base);
5423                                 free(dup_name);
5424                                 continue;
5425                         }
5426
5427                         if (!all && dup_name[strlen(dup_name)-1] == '/') {
5428                                 dup_name[strlen(dup_name)-1] = '\0';
5429                         }
5430
5431                         loc_name = imap_modified_utf7_to_utf8(base, FALSE);
5432                         loc_path = imap_modified_utf7_to_utf8(dup_name, FALSE);
5433
5434                         new_item = folder_item_new(FOLDER(folder), loc_name, loc_path);
5435                         if ((flags & ETPAN_IMAP_MB_NOINFERIORS) != 0)
5436                                 new_item->no_sub = TRUE;
5437                         if (strcmp(dup_name, "INBOX") != 0 &&
5438                             ((flags & ETPAN_IMAP_MB_NOSELECT) != 0))
5439                                 new_item->no_select = TRUE;
5440
5441                         if (item_list == NULL)
5442                                 llast = item_list = g_slist_append(item_list, new_item);
5443                         else {
5444                                 llast = g_slist_append(llast, new_item);
5445                                 llast = llast->next;
5446                         }
5447                         debug_print("folder '%s' found.\n", loc_path);
5448                         g_free(base);
5449                         g_free(loc_path);
5450                         g_free(loc_name);
5451
5452                         free(dup_name);
5453                 }
5454         }
5455         return item_list;
5456 }
5457
5458 static GSList * imap_get_lep_set_from_numlist(IMAPFolder *folder, MsgNumberList *numlist)
5459 {
5460         GSList *sorted_list, *cur;
5461         guint first, last, next;
5462         GSList *ret_list = NULL, *llast = NULL;
5463         struct mailimap_set * current_set;
5464         unsigned int item_count;
5465
5466         if (numlist == NULL)
5467                 return NULL;
5468
5469         current_set = mailimap_set_new_empty();
5470
5471         sorted_list = g_slist_copy(numlist);
5472         sorted_list = g_slist_sort(sorted_list, g_int_compare);
5473
5474         first = GPOINTER_TO_INT(sorted_list->data);
5475
5476         item_count = 0;
5477         for (cur = sorted_list; cur != NULL; cur = g_slist_next(cur)) {
5478                 if (GPOINTER_TO_INT(cur->data) == 0)
5479                         continue;
5480
5481                 item_count ++;
5482
5483                 last = GPOINTER_TO_INT(cur->data);
5484                 if (cur->next)
5485                         next = GPOINTER_TO_INT(cur->next->data);
5486                 else
5487                         next = 0;
5488
5489                 if (last + 1 != next || next == 0 || item_count >= folder->max_set_size) {
5490
5491                         struct mailimap_set_item * item;
5492                         item = mailimap_set_item_new(first, last);
5493                         mailimap_set_add(current_set, item);
5494
5495                         first = next;
5496
5497                         if (item_count >= folder->max_set_size) {
5498                                 if (ret_list == NULL)
5499                                         llast = ret_list = g_slist_append(ret_list,
5500                                                           current_set);
5501                                 else {
5502                                         llast = g_slist_append(llast, current_set);
5503                                         llast = llast->next;
5504                                 }
5505
5506                                 current_set = mailimap_set_new_empty();
5507                                 item_count = 0;
5508                         }
5509                 }
5510         }
5511
5512         if (clist_count(current_set->set_list) > 0) {
5513                 ret_list = g_slist_append(ret_list,
5514                                           current_set);
5515         }
5516
5517         g_slist_free(sorted_list);
5518
5519         return ret_list;
5520 }
5521
5522 static GSList * imap_get_lep_set_from_msglist(IMAPFolder *folder, MsgInfoList *msglist)
5523 {
5524         MsgNumberList *numlist = NULL;
5525         GSList *seq_list;
5526
5527         numlist = procmsg_get_number_list_for_msgs(msglist);
5528
5529         seq_list = imap_get_lep_set_from_numlist(folder, numlist);
5530         g_slist_free(numlist);
5531
5532         return seq_list;
5533 }
5534
5535 static GSList * imap_uid_list_from_lep(clist * list, gint* length)
5536 {
5537         clistiter * iter;
5538         GSList * result;
5539         gint len = 0;
5540
5541         result = NULL;
5542
5543         if (list) {
5544                 for(iter = clist_begin(list) ; iter != NULL ;
5545                     iter = clist_next(iter)) {
5546                         uint32_t * puid;
5547
5548                         puid = clist_content(iter);
5549                         result = g_slist_prepend(result, GINT_TO_POINTER(* puid));
5550                         len++;
5551                 }
5552                 result = g_slist_reverse(result);
5553         }
5554         if (length)
5555                 *length = len;
5556         return result;
5557 }
5558
5559 static GSList * imap_uid_list_from_lep_tab(carray * list)
5560 {
5561         unsigned int i;
5562         GSList * result;
5563
5564         result = NULL;
5565
5566         for(i = 0 ; i < carray_count(list) ; i ++) {
5567                 uint32_t * puid;
5568
5569                 puid = carray_get(list, i);
5570                 result = g_slist_prepend(result, GINT_TO_POINTER(* puid));
5571         }
5572         result = g_slist_reverse(result);
5573         return result;
5574 }
5575
5576 static void imap_flags_hash_from_lep_uid_flags_tab(carray * list,
5577                                                    GHashTable * hash,
5578                                                    GHashTable * tags_hash)
5579 {
5580         unsigned int i;
5581
5582         for(i = 0 ; i < carray_count(list) ; i += 3) {
5583                 uint32_t * puid;
5584                 int * pflags;
5585                 GSList *tags;
5586
5587                 puid = carray_get(list, i);
5588                 pflags = carray_get(list, i + 1);
5589                 tags = carray_get(list, i + 2);
5590
5591                 g_hash_table_insert(hash, GINT_TO_POINTER(*puid), GINT_TO_POINTER(* pflags));
5592                 g_hash_table_insert(tags_hash, GINT_TO_POINTER(*puid), tags);
5593         }
5594 }
5595
5596 static MsgInfo *imap_envelope_from_lep(struct imap_fetch_env_info * info,
5597                                        FolderItem *item)
5598 {
5599         MsgInfo *msginfo = NULL;
5600         guint32 uid = 0;
5601         goffset size = 0;
5602         MsgFlags flags = {0, 0};
5603
5604         if (info->headers == NULL)
5605                 return NULL;
5606
5607         MSG_SET_TMP_FLAGS(flags, MSG_IMAP);
5608         if (folder_has_parent_of_type(item, F_QUEUE)) {
5609                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
5610         } else if (folder_has_parent_of_type(item, F_DRAFT)) {
5611                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
5612         }
5613         flags.perm_flags = info->flags;
5614
5615         uid = info->uid;
5616         size = (goffset) info->size;
5617         msginfo = procheader_parse_str(info->headers, flags, FALSE, FALSE);
5618
5619         if (msginfo) {
5620                 msginfo->msgnum = uid;
5621                 msginfo->size = size;
5622         }
5623
5624         return msginfo;
5625 }
5626
5627 static void imap_lep_set_free(GSList *seq_list)
5628 {
5629         GSList * cur;
5630
5631         for(cur = seq_list ; cur != NULL ; cur = g_slist_next(cur)) {
5632                 struct mailimap_set * imapset;
5633
5634                 imapset = cur->data;
5635                 mailimap_set_free(imapset);
5636         }
5637         g_slist_free(seq_list);
5638 }
5639
5640 static struct mailimap_flag_list * imap_flag_to_lep(IMAPFolderItem *item, IMAPFlags flags, GSList *tags)
5641 {
5642         struct mailimap_flag_list * flag_list;
5643         GSList *cur = tags;
5644
5645         flag_list = mailimap_flag_list_new_empty();
5646
5647         if (IMAP_IS_SEEN(flags))
5648                 mailimap_flag_list_add(flag_list,
5649                                        mailimap_flag_new_seen());
5650         if (IMAP_IS_ANSWERED(flags))
5651                 mailimap_flag_list_add(flag_list,
5652                                        mailimap_flag_new_answered());
5653         if (IMAP_IS_FLAGGED(flags))
5654                 mailimap_flag_list_add(flag_list,
5655                                        mailimap_flag_new_flagged());
5656         if (IMAP_IS_DELETED(flags))
5657                 mailimap_flag_list_add(flag_list,
5658                                        mailimap_flag_new_deleted());
5659         if (IMAP_IS_DRAFT(flags))
5660                 mailimap_flag_list_add(flag_list,
5661                                        mailimap_flag_new_draft());
5662         if (IMAP_IS_FORWARDED(flags) && flag_ok(item, IMAP_FLAG_FORWARDED))
5663                 mailimap_flag_list_add(flag_list,
5664                                        mailimap_flag_new_flag_keyword(strdup(RTAG_FORWARDED)));
5665         if (IMAP_IS_SPAM(flags) && flag_ok(item, IMAP_FLAG_SPAM))
5666                 mailimap_flag_list_add(flag_list,
5667                                        mailimap_flag_new_flag_keyword(strdup(RTAG_JUNK)));
5668         else if (IMAP_IS_HAM(flags) && flag_ok(item, IMAP_FLAG_HAM))
5669                 mailimap_flag_list_add(flag_list,
5670                                        mailimap_flag_new_flag_keyword(strdup(RTAG_NON_JUNK)));
5671
5672         for (; cur; cur = cur->next) {
5673                 gchar *enc_str =
5674                         imap_utf8_to_modified_utf7(cur->data, TRUE);
5675                 g_strstrip(enc_str);
5676
5677                 mailimap_flag_list_add(flag_list,
5678                         mailimap_flag_new_flag_keyword(enc_str));
5679         }
5680
5681         return flag_list;
5682 }
5683
5684 guint imap_folder_get_refcnt(Folder *folder)
5685 {
5686         return ((IMAPFolder *)folder)->refcnt;
5687 }
5688
5689 void imap_folder_ref(Folder *folder)
5690 {
5691         ((IMAPFolder *)folder)->refcnt++;
5692 }
5693
5694 void imap_disconnect_all(gboolean have_connectivity)
5695 {
5696         GList *list;
5697         gboolean short_timeout;
5698 #ifdef HAVE_NETWORKMANAGER_SUPPORT
5699         GError *error;
5700 #endif
5701
5702 #ifdef HAVE_NETWORKMANAGER_SUPPORT
5703         error = NULL;
5704         short_timeout = !networkmanager_is_online(&error);
5705         if(error) {
5706                 short_timeout = TRUE;
5707                 g_error_free(error);
5708         }
5709 #else
5710         short_timeout = TRUE;
5711 #endif
5712
5713         if(short_timeout)
5714                 imap_main_set_timeout(1);
5715
5716         for (list = account_get_list(); list != NULL; list = list->next) {
5717                 PrefsAccount *account = list->data;
5718                 if (account->protocol == A_IMAP4) {
5719                         RemoteFolder *folder = (RemoteFolder *)account->folder;
5720                         if (folder && folder->session) {
5721                                 IMAPSession *session = (IMAPSession *)folder->session;
5722                                 if (have_connectivity)
5723                                         imap_threaded_disconnect(FOLDER(folder));
5724                                 SESSION(session)->state = SESSION_DISCONNECTED;
5725                                 SESSION(session)->sock = NULL;
5726                                 session_destroy(SESSION(session));
5727                                 folder->session = NULL;
5728                         }
5729                 }
5730         }
5731
5732         if(short_timeout)
5733                 imap_main_set_timeout(prefs_common.io_timeout_secs);
5734 }
5735
5736 void imap_folder_unref(Folder *folder)
5737 {
5738         if (((IMAPFolder *)folder)->refcnt > 0)
5739                 ((IMAPFolder *)folder)->refcnt--;
5740 }
5741
5742 void imap_cancel_all(void)
5743 {
5744         GList *folderlist;
5745         GList *cur;
5746
5747         folderlist = folder_get_list();
5748         for (cur = folderlist; cur != NULL; cur = g_list_next(cur)) {
5749                 Folder *folder = (Folder *) cur->data;
5750
5751                 if (folder->klass == &imap_class) {
5752                         if (imap_is_busy(folder)) {
5753                                 IMAPSession *imap_session;
5754                                 RemoteFolder *rfolder;
5755
5756                                 g_printerr("cancelled\n");
5757                                 imap_threaded_cancel(folder);
5758                                 rfolder = (RemoteFolder *) folder;
5759                                 imap_session = (IMAPSession *) rfolder->session;
5760                                 if (imap_session)
5761                                         imap_session->cancelled = 1;
5762                         }
5763                 }
5764         }
5765 }
5766
5767 gboolean imap_cancel_all_enabled(void)
5768 {
5769         GList *folderlist;
5770         GList *cur;
5771
5772         folderlist = folder_get_list();
5773         for (cur = folderlist; cur != NULL; cur = g_list_next(cur)) {
5774                 Folder *folder = (Folder *) cur->data;
5775
5776                 if (folder->klass == &imap_class) {
5777                         if (imap_is_busy(folder)) {
5778                                 return TRUE;
5779                         }
5780                 }
5781         }
5782
5783         return FALSE;
5784 }
5785
5786 static gboolean imap_is_busy(Folder *folder)
5787 {
5788         IMAPSession *imap_session;
5789         RemoteFolder *rfolder;
5790
5791         rfolder = (RemoteFolder *) folder;
5792         imap_session = (IMAPSession *) rfolder->session;
5793         if (imap_session == NULL)
5794                 return FALSE;
5795
5796         return imap_session->busy;
5797 }
5798
5799 #else /* HAVE_LIBETPAN */
5800
5801 static FolderClass imap_class;
5802
5803 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item);
5804 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag);
5805
5806 static Folder   *imap_folder_new        (const gchar    *name,
5807                                          const gchar    *path)
5808 {
5809         static gboolean missing_imap_warning = TRUE;
5810         if (missing_imap_warning) {
5811                 missing_imap_warning = FALSE;
5812                 alertpanel_error(
5813                         _("You have one or more IMAP accounts "
5814                           "defined. However this version of "
5815                           "Claws Mail has been built without "
5816                           "IMAP support; your IMAP account(s) are "
5817                           "disabled.\n\n"
5818                           "You probably need to "
5819                           "install libetpan and recompile "
5820                           "Claws Mail."));
5821         }
5822         return NULL;
5823 }
5824 static gint     imap_create_tree        (Folder         *folder)
5825 {
5826         return -1;
5827 }
5828 static FolderItem *imap_create_folder   (Folder         *folder,
5829                                          FolderItem     *parent,
5830                                          const gchar    *name)
5831 {
5832         return NULL;
5833 }
5834 static gint     imap_rename_folder      (Folder         *folder,
5835                                          FolderItem     *item,
5836                                          const gchar    *name)
5837 {
5838         return -1;
5839 }
5840
5841 gchar imap_get_path_separator_for_item(FolderItem *item)
5842 {
5843         return '/';
5844 }
5845
5846 FolderClass *imap_get_class(void)
5847 {
5848         if (imap_class.idstr == NULL) {
5849                 imap_class.type = F_IMAP;
5850                 imap_class.idstr = "imap";
5851                 imap_class.uistr = "IMAP4";
5852
5853                 imap_class.new_folder = imap_folder_new;
5854                 imap_class.create_tree = imap_create_tree;
5855                 imap_class.create_folder = imap_create_folder;
5856                 imap_class.rename_folder = imap_rename_folder;
5857
5858                 imap_class.set_xml = folder_set_xml;
5859                 imap_class.get_xml = folder_get_xml;
5860                 imap_class.item_set_xml = imap_item_set_xml;
5861                 imap_class.item_get_xml = imap_item_get_xml;
5862                 /* nothing implemented */
5863         }
5864
5865         return &imap_class;
5866 }
5867
5868 void imap_disconnect_all(gboolean have_connectivity)
5869 {
5870 }
5871
5872 gint imap_subscribe(Folder *folder, FolderItem *item, gchar *rpath, gboolean sub)
5873 {
5874         return -1;
5875 }
5876
5877 GList * imap_scan_subtree(Folder *folder, FolderItem *item, gboolean unsubs_only, gboolean recursive)
5878 {
5879         return NULL;
5880 }
5881
5882 void imap_cache_msg(FolderItem *item, gint msgnum)
5883 {
5884 }
5885
5886 void imap_cancel_all(void)
5887 {
5888 }
5889
5890 gboolean imap_cancel_all_enabled(void)
5891 {
5892         return FALSE;
5893 }
5894
5895 #endif
5896
5897 #ifdef HAVE_LIBETPAN
5898 static void imap_synchronise(FolderItem *item, gint days)
5899 {
5900         if (IMAP_FOLDER_ITEM(item)->last_sync == IMAP_FOLDER_ITEM(item)->last_change) {
5901                 debug_print("%s already synced\n", item->path?item->path:item->name);
5902                 return;
5903         }
5904         debug_print("syncing %s\n", item->path?item->path:item->name);
5905         imap_gtk_synchronise(item, days);
5906         IMAP_FOLDER_ITEM(item)->last_sync = IMAP_FOLDER_ITEM(item)->last_change;
5907 }
5908 #endif
5909
5910 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag)
5911 {
5912 #ifdef HAVE_LIBETPAN
5913         GList *cur;
5914 #endif
5915         folder_item_set_xml(folder, item, tag);
5916
5917 #ifdef HAVE_LIBETPAN
5918         for (cur = tag->attr; cur != NULL; cur = g_list_next(cur)) {
5919                 XMLAttr *attr = (XMLAttr *) cur->data;
5920
5921                 if (!attr || !attr->name || !attr->value) continue;
5922                 if (!strcmp(attr->name, "uidnext"))
5923                         IMAP_FOLDER_ITEM(item)->uid_next = atoi(attr->value);
5924                 if (!strcmp(attr->name, "last_sync"))
5925                         IMAP_FOLDER_ITEM(item)->last_sync = atoi(attr->value);
5926                 if (!strcmp(attr->name, "last_change"))
5927                         IMAP_FOLDER_ITEM(item)->last_change = atoi(attr->value);
5928         }
5929         if (IMAP_FOLDER_ITEM(item)->last_change == 0)
5930                 IMAP_FOLDER_ITEM(item)->last_change = time(NULL);
5931 #endif
5932 }
5933
5934 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item)
5935 {
5936         XMLTag *tag;
5937
5938         tag = folder_item_get_xml(folder, item);
5939
5940 #ifdef HAVE_LIBETPAN
5941         xml_tag_add_attr(tag, xml_attr_new_int("uidnext",
5942                         IMAP_FOLDER_ITEM(item)->uid_next));
5943         xml_tag_add_attr(tag, xml_attr_new_int("last_sync",
5944                         IMAP_FOLDER_ITEM(item)->last_sync));
5945         xml_tag_add_attr(tag, xml_attr_new_int("last_change",
5946                         IMAP_FOLDER_ITEM(item)->last_change));
5947
5948 #endif
5949         return tag;
5950 }
5951
5952 /* ===================================================================
5953  * UTF-7 conversion routines as in RFC 2192
5954  * ===================================================================
5955  * These two functions from:
5956  * libimap library.
5957  * Copyright (C) 2003-2004 Pawel Salek. */
5958
5959 /* UTF7 modified base64 alphabet */
5960 static char base64chars[] =
5961   "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+,";
5962 #define UNDEFINED 64
5963
5964 /* UTF16 definitions */
5965 #define UTF16MASK       0x03FFUL
5966 #define UTF16SHIFT      10
5967 #define UTF16BASE       0x10000UL
5968 #define UTF16HIGHSTART  0xD800UL
5969 #define UTF16HIGHEND    0xDBFFUL
5970 #define UTF16LOSTART    0xDC00UL
5971 #define UTF16LOEND      0xDFFFUL
5972
5973
5974 /* Convert an IMAP mailbox to a UTF-8 string.
5975  *  dst needs to have roughly 4 times the storage space of src
5976  *    Hex encoding can triple the size of the input
5977  *    UTF-7 can be slightly denser than UTF-8
5978  *     (worst case: 8 octets UTF-7 becomes 9 octets UTF-8)
5979  */
5980 char* imap_modified_utf7_to_utf8(const char *mbox, gboolean change_spaces)
5981 {
5982   unsigned c, i, bitcount;
5983   unsigned long ucs4, utf16, bitbuf;
5984   unsigned char base64[256];
5985   const char *src;
5986   char *dst, *res  = g_malloc(2*strlen(mbox)+1);
5987
5988   dst = res;
5989   src = mbox;
5990   if(!dst) return NULL;
5991   /* initialize modified base64 decoding table */
5992   memset(base64, UNDEFINED, sizeof (base64));
5993   for (i = 0; i < sizeof (base64chars); ++i) {
5994     base64[(unsigned)base64chars[i]] = i;
5995   }
5996
5997   /* loop until end of string */
5998   while (*src != '\0') {
5999     c = *src++;
6000     /* deal with literal characters and &- */
6001     if (c != '&' || *src == '-') {
6002       /* encode literally */
6003       if (change_spaces && c == '_')
6004         *dst++ = ' ';
6005       else
6006         *dst++ = c;
6007       /* skip over the '-' if this is an &- sequence */
6008       if (c == '&') ++src;
6009     } else {
6010       /* convert modified UTF-7 -> UTF-16 -> UCS-4 -> UTF-8 -> HEX */
6011       bitbuf = 0;
6012       bitcount = 0;
6013       ucs4 = 0;
6014       while ((c = base64[(unsigned char) *src]) != UNDEFINED) {
6015         ++src;
6016         bitbuf = (bitbuf << 6) | c;
6017         bitcount += 6;
6018         /* enough bits for a UTF-16 character? */
6019         if (bitcount >= 16) {
6020           bitcount -= 16;
6021           utf16 = (bitcount ? bitbuf >> bitcount
6022                    : bitbuf) & 0xffff;
6023           /* convert UTF16 to UCS4 */
6024           if
6025             (utf16 >= UTF16HIGHSTART && utf16 <= UTF16HIGHEND) {
6026             ucs4 = (utf16 - UTF16HIGHSTART) << UTF16SHIFT;
6027             continue;
6028           } else if
6029             (utf16 >= UTF16LOSTART && utf16 <= UTF16LOEND) {
6030             ucs4 += utf16 - UTF16LOSTART + UTF16BASE;
6031           } else {
6032             ucs4 = utf16;
6033           }
6034
6035           /* convert UTF-16 range of UCS4 to UTF-8 */
6036           if (ucs4 <= 0x7fUL) {
6037             dst[0] = ucs4;
6038             dst += 1;
6039           } else if (ucs4 <= 0x7ffUL) {
6040             dst[0] = 0xc0 | (ucs4 >> 6);
6041             dst[1] = 0x80 | (ucs4 & 0x3f);
6042             dst += 2;
6043           } else if (ucs4 <= 0xffffUL) {
6044             dst[0] = 0xe0 | (ucs4 >> 12);
6045             dst[1] = 0x80 | ((ucs4 >> 6) & 0x3f);
6046             dst[2] = 0x80 | (ucs4 & 0x3f);
6047             dst += 3;
6048           } else {
6049             dst[0] = 0xf0 | (ucs4 >> 18);
6050             dst[1] = 0x80 | ((ucs4 >> 12) & 0x3f);
6051             dst[2] = 0x80 | ((ucs4 >> 6) & 0x3f);
6052             dst[3] = 0x80 | (ucs4 & 0x3f);
6053             dst += 4;
6054           }
6055         }
6056       }
6057       /* skip over trailing '-' in modified UTF-7 encoding */
6058       if (*src == '-') ++src;
6059     }
6060   }
6061   /* terminate destination string */
6062   *dst = '\0';
6063   return res;
6064 }
6065
6066 /* Convert hex coded UTF-8 string to modified UTF-7 IMAP mailbox
6067  *  dst should be about twice the length of src to deal with non-hex
6068  *  coded URLs
6069  */
6070 char* imap_utf8_to_modified_utf7(const char *src, gboolean change_spaces)
6071 {
6072   unsigned int utf8pos, utf8total, c, utf7mode, bitstogo, utf16flag;
6073   unsigned long ucs4 = 0, bitbuf = 0;
6074
6075   /* initialize hex lookup table */
6076   char *dst, *res;
6077
6078   if (!src) return NULL;
6079
6080   res = malloc(2*strlen(src)+1);
6081   dst = res;
6082   if(!dst) return NULL;
6083
6084   utf7mode = 0;
6085   utf8total = 0;
6086   bitstogo = 0;
6087   utf8pos = 0;
6088   while ((c = (unsigned char)*src) != '\0') {
6089     ++src;
6090     /* normal character? */
6091     if (c >= ' ' && c <= '~' && (c != '_' || !change_spaces)) {
6092       /* switch out of UTF-7 mode */
6093       if (utf7mode) {
6094         if (bitstogo) {
6095           *dst++ = base64chars[(bitbuf << (6 - bitstogo)) & 0x3F];
6096         }
6097         *dst++ = '-';
6098         utf7mode = 0;
6099         utf8pos  = 0;
6100         bitstogo = 0;
6101         utf8total= 0;
6102       }
6103       if (change_spaces && c == ' ')
6104         *dst++ = '_';
6105       else
6106         *dst++ = c;
6107       /* encode '&' as '&-' */
6108       if (c == '&') {
6109         *dst++ = '-';
6110       }
6111       continue;
6112     }
6113     /* switch to UTF-7 mode */
6114     if (!utf7mode) {
6115       *dst++ = '&';
6116       utf7mode = 1;
6117     }
6118     /* Encode US-ASCII characters as themselves */
6119     if (c < 0x80) {
6120       ucs4 = c;
6121     } else if (utf8total) {
6122       /* save UTF8 bits into UCS4 */
6123       ucs4 = (ucs4 << 6) | (c & 0x3FUL);
6124       if (++utf8pos < utf8total) {
6125         continue;
6126       }
6127     } else {
6128       utf8pos = 1;
6129       if (c < 0xE0) {
6130         utf8total = 2;
6131         ucs4 = c & 0x1F;
6132       } else if (c < 0xF0) {
6133         utf8total = 3;
6134         ucs4 = c & 0x0F;
6135       } else {
6136         /* NOTE: can't convert UTF8 sequences longer than 4 */
6137         utf8total = 4;
6138         ucs4 = c & 0x03;
6139       }
6140       continue;
6141     }
6142     /* loop to split ucs4 into two utf16 chars if necessary */
6143     utf8total = 0;
6144     do {
6145       if (ucs4 >= UTF16BASE) {
6146         ucs4 -= UTF16BASE;
6147         bitbuf = (bitbuf << 16) | ((ucs4 >> UTF16SHIFT)
6148                                    + UTF16HIGHSTART);
6149         ucs4 = (ucs4 & UTF16MASK) + UTF16LOSTART;
6150         utf16flag = 1;
6151       } else {
6152         bitbuf = (bitbuf << 16) | ucs4;
6153         utf16flag = 0;
6154       }
6155       bitstogo += 16;
6156       /* spew out base64 */
6157       while (bitstogo >= 6) {
6158         bitstogo -= 6;
6159         *dst++ = base64chars[(bitstogo ? (bitbuf >> bitstogo)
6160                               : bitbuf)
6161                              & 0x3F];
6162       }
6163     } while (utf16flag);
6164   }
6165   /* if in UTF-7 mode, finish in ASCII */
6166   if (utf7mode) {
6167     if (bitstogo) {
6168       *dst++ = base64chars[(bitbuf << (6 - bitstogo)) & 0x3F];
6169     }
6170     *dst++ = '-';
6171   }
6172   /* tie off string */
6173   *dst = '\0';
6174   return res;
6175 }