src/imap.c

   1 /*
   2  * Claws Mail -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2016 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 #ifdef HAVE_CONFIG_H
  20 #  include "config.h"
  21 #include "claws-features.h"
  22 #endif
  23
  24 #include "defs.h"
  25
  26 #include <glib.h>
  27 #include <glib/gi18n.h>
  28 #include <stdio.h>
  29 #include <string.h>
  30 #include "imap.h"
  31 #include "imap_gtk.h"
  32 #include "inc.h"
  33 #include "xml.h"
  34 #include "alertpanel.h"
  35
  36 #ifdef HAVE_LIBETPAN
  37
  38 #include <stdlib.h>
  39 #include <dirent.h>
  40 #include <unistd.h>
  41 #include <ctype.h>
  42 #include <time.h>
  43 #include <errno.h>
  44 #if HAVE_ICONV
  45 #  include <iconv.h>
  46 #endif
  47
  48 #ifdef USE_GNUTLS
  49 #  include "ssl.h"
  50 #endif
  51
  52 #include "folder.h"
  53 #include "session.h"
  54 #include "procmsg.h"
  55 #include "socket.h"
  56 #include "recv.h"
  57 #include "procheader.h"
  58 #include "prefs_account.h"
  59 #include "codeconv.h"
  60 #include "md5.h"
  61 #include "utils.h"
  62 #include "prefs_common.h"
  63 #include "inputdialog.h"
  64 #include "log.h"
  65 #include "remotefolder.h"
  66 #include "claws.h"
  67 #include "statusbar.h"
  68 #include "msgcache.h"
  69 #include "imap-thread.h"
  70 #include "account.h"
  71 #include "tags.h"
  72 #include "main.h"
  73 #include "passwordstore.h"
  74
  75 typedef struct _IMAPFolder      IMAPFolder;
  76 typedef struct _IMAPSession     IMAPSession;
  77 typedef struct _IMAPNameSpace   IMAPNameSpace;
  78 typedef struct _IMAPFolderItem  IMAPFolderItem;
  79
  80 #include "prefs_account.h"
  81
  82 #define IMAP_FOLDER(obj)        ((IMAPFolder *)obj)
  83 #define IMAP_FOLDER_ITEM(obj)   ((IMAPFolderItem *)obj)
  84 #define IMAP_SESSION(obj)       ((IMAPSession *)obj)
  85
  86 struct _IMAPFolder
  87 {
  88         RemoteFolder rfolder;
  89
  90         /* list of IMAPNameSpace */
  91         GList *ns_personal;
  92         GList *ns_others;
  93         GList *ns_shared;
  94         gchar last_seen_separator;
  95         guint refcnt;
  96         guint max_set_size;
  97         gchar *search_charset;
  98         gboolean search_charset_supported;
  99 };
 100
 101 struct _IMAPSession
 102 {
 103         Session session;
 104
 105         gboolean authenticated;
 106
 107         GSList *capability;
 108         gboolean uidplus;
 109
 110         gchar *mbox;
 111         guint cmd_count;
 112
 113         /* CLAWS */
 114         gboolean folder_content_changed;
 115         guint exists;
 116         guint recent;
 117         guint expunge;
 118         guint unseen;
 119         guint uid_validity;
 120         guint uid_next;
 121
 122         Folder * folder;
 123         gboolean busy;
 124         gboolean cancelled;
 125         gboolean sens_update_block;
 126         gboolean do_destroy;
 127 };
 128
 129 struct _IMAPNameSpace
 130 {
 131         gchar *name;
 132         gchar separator;
 133 };
 134
 135 #define IMAPBUFSIZE     8192
 136
 137 #define IMAP_IS_SEEN(flags)     ((flags & IMAP_FLAG_SEEN) != 0)
 138 #define IMAP_IS_ANSWERED(flags) ((flags & IMAP_FLAG_ANSWERED) != 0)
 139 #define IMAP_IS_FLAGGED(flags)  ((flags & IMAP_FLAG_FLAGGED) != 0)
 140 #define IMAP_IS_DELETED(flags)  ((flags & IMAP_FLAG_DELETED) != 0)
 141 #define IMAP_IS_DRAFT(flags)    ((flags & IMAP_FLAG_DRAFT) != 0)
 142 #define IMAP_IS_FORWARDED(flags)        ((flags & IMAP_FLAG_FORWARDED) != 0)
 143 #define IMAP_IS_SPAM(flags)     ((flags & IMAP_FLAG_SPAM) != 0)
 144 #define IMAP_IS_HAM(flags)      ((flags & IMAP_FLAG_HAM) != 0)
 145
 146
 147 #define IMAP4_PORT      143
 148 #ifdef USE_GNUTLS
 149 #define IMAPS_PORT      993
 150 #endif
 151
 152 #define IMAP_CMD_LIMIT  1000
 153
 154 enum {
 155         ITEM_CAN_CREATE_FLAGS_UNKNOWN = 0,
 156         ITEM_CAN_CREATE_FLAGS,
 157         ITEM_CANNOT_CREATE_FLAGS
 158 };
 159
 160 struct _IMAPFolderItem
 161 {
 162         FolderItem item;
 163
 164         guint lastuid;
 165         guint uid_next;
 166         GSList *uid_list;
 167         gboolean batching;
 168
 169         GHashTable *flags_set_table;
 170         GHashTable *flags_unset_table;
 171         guint32 last_change;
 172         guint32 last_sync;
 173         gboolean should_update;
 174         gboolean should_trash_cache;
 175         gint can_create_flags;
 176
 177         GHashTable *tags_set_table;
 178         GHashTable *tags_unset_table;
 179         GSList *ok_flags;
 180
 181 };
 182
 183 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item);
 184 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag);
 185
 186 static void imap_folder_init            (Folder         *folder,
 187                                          const gchar    *name,
 188                                          const gchar    *path);
 189
 190 static Folder   *imap_folder_new        (const gchar    *name,
 191                                          const gchar    *path);
 192 static void      imap_folder_destroy    (Folder         *folder);
 193
 194 static IMAPSession *imap_session_new    (Folder         *folder,
 195                                          const PrefsAccount     *account);
 196 static gint     imap_session_authenticate(IMAPSession   *session,
 197                                           PrefsAccount  *account);
 198 static void     imap_session_destroy    (Session        *session);
 199
 200 static gchar   *imap_fetch_msg          (Folder         *folder,
 201                                          FolderItem     *item,
 202                                          gint            uid);
 203 static gchar   *imap_fetch_msg_full     (Folder         *folder,
 204                                          FolderItem     *item,
 205                                          gint            uid,
 206                                          gboolean        headers,
 207                                          gboolean        body);
 208 static void     imap_remove_cached_msg  (Folder         *folder,
 209                                          FolderItem     *item,
 210                                          MsgInfo        *msginfo);
 211 static gint     imap_add_msg            (Folder         *folder,
 212                                          FolderItem     *dest,
 213                                          const gchar    *file,
 214                                          MsgFlags       *flags);
 215 static gint     imap_add_msgs           (Folder         *folder,
 216                                          FolderItem     *dest,
 217                                          GSList         *file_list,
 218                                          GHashTable     *relation);
 219
 220 static gint     imap_copy_msg           (Folder         *folder,
 221                                          FolderItem     *dest,
 222                                          MsgInfo        *msginfo);
 223 static gint     imap_copy_msgs          (Folder         *folder,
 224                                          FolderItem     *dest,
 225                                          MsgInfoList    *msglist,
 226                                          GHashTable     *relation);
 227
 228 static gint     search_msgs             (Folder                 *folder,
 229                                          FolderItem             *container,
 230                                          MsgNumberList          **msgs,
 231                                          gboolean               *on_server,
 232                                          MatcherList            *predicate,
 233                                          SearchProgressNotify   progress_cb,
 234                                          gpointer               progress_data);
 235
 236 static gint     imap_remove_msg         (Folder         *folder,
 237                                          FolderItem     *item,
 238                                          gint            uid);
 239 static gint     imap_remove_msgs        (Folder         *folder,
 240                                          FolderItem     *dest,
 241                                          MsgInfoList    *msglist,
 242                                          GHashTable     *relation);
 243 static gint     imap_expunge            (Folder         *folder,
 244                                          FolderItem     *dest);
 245 static gint     imap_remove_all_msg     (Folder         *folder,
 246                                          FolderItem     *item);
 247
 248 static gboolean imap_is_msg_changed     (Folder         *folder,
 249                                          FolderItem     *item,
 250                                          MsgInfo        *msginfo);
 251
 252 static gint     imap_close              (Folder         *folder,
 253                                          FolderItem     *item);
 254
 255 static gint     imap_scan_tree          (Folder         *folder);
 256
 257 static gint     imap_create_tree        (Folder         *folder);
 258
 259 static FolderItem *imap_create_folder   (Folder         *folder,
 260                                          FolderItem     *parent,
 261                                          const gchar    *name);
 262 static gint     imap_rename_folder      (Folder         *folder,
 263                                          FolderItem     *item,
 264                                          const gchar    *name);
 265 static gint     imap_remove_folder      (Folder         *folder,
 266                                          FolderItem     *item);
 267
 268 static FolderItem *imap_folder_item_new (Folder         *folder);
 269 static void imap_folder_item_destroy    (Folder         *folder,
 270                                          FolderItem     *item);
 271
 272 static IMAPSession *imap_session_get    (Folder         *folder);
 273
 274 static gint imap_auth                   (IMAPSession    *session,
 275                                          const gchar    *user,
 276                                          const gchar    *pass,
 277                                          IMAPAuthType    type);
 278
 279 static gint imap_scan_tree_recursive    (IMAPSession    *session,
 280                                          FolderItem     *item,
 281                                          gboolean        subs_only);
 282
 283 static void imap_create_missing_folders (Folder         *folder);
 284 static FolderItem *imap_create_special_folder
 285                                         (Folder                 *folder,
 286                                          SpecialFolderItemType   stype,
 287                                          const gchar            *name);
 288
 289 static gint imap_do_copy_msgs           (Folder         *folder,
 290                                          FolderItem     *dest,
 291                                          MsgInfoList    *msglist,
 292                                          GHashTable     *relation,
 293                                          gboolean        same_dest_ok);
 294
 295 static gint imap_do_remove_msgs         (Folder         *folder,
 296                                          FolderItem     *dest,
 297                                          MsgInfoList    *msglist,
 298                                          GHashTable     *relation);
 299
 300 static void imap_delete_all_cached_messages     (FolderItem     *item);
 301 static void imap_set_batch              (Folder         *folder,
 302                                          FolderItem     *item,
 303                                          gboolean        batch);
 304 static gint imap_set_message_flags      (IMAPSession    *session,
 305                                          IMAPFolderItem *item,
 306                                          MsgNumberList  *numlist,
 307                                          IMAPFlags       flags,
 308                                          GSList         *tags,
 309                                          gboolean        is_set);
 310 static gint imap_select                 (IMAPSession    *session,
 311                                          IMAPFolder     *folder,
 312                                          FolderItem     *item,
 313                                          gint           *exists,
 314                                          gint           *recent,
 315                                          gint           *unseen,
 316                                          guint32        *uid_validity,
 317                                          gint           *can_create_flags,
 318                                          gboolean        block);
 319 static gint imap_status                 (IMAPSession    *session,
 320                                          IMAPFolder     *folder,
 321                                          const gchar    *path,
 322                                          IMAPFolderItem *item,
 323                                          gint           *messages,
 324                                          guint32        *uid_next,
 325                                          guint32        *uid_validity,
 326                                          gint           *unseen,
 327                                          gboolean        block);
 328 static void     imap_commit_tags        (FolderItem     *item,
 329                                          MsgInfo        *msginfo,
 330                                          GSList         *set_tags,
 331                                          GSList         *unset_tags);
 332
 333 static gchar imap_get_path_separator            (IMAPSession    *session,
 334                                                  IMAPFolder     *folder,
 335                                                  const gchar    *path,
 336                                                  gint           *ok);
 337 static gchar *imap_get_real_path                (IMAPSession    *session,
 338                                                  IMAPFolder     *folder,
 339                                                  const gchar    *path,
 340                                                  gint           *ok);
 341 #ifdef HAVE_LIBETPAN
 342 static void imap_synchronise            (FolderItem     *item, gint days);
 343 #endif
 344 static gboolean imap_is_busy            (Folder *folder);
 345
 346 static void imap_free_capabilities      (IMAPSession    *session);
 347
 348 /* low-level IMAP4rev1 commands */
 349 static gint imap_cmd_login      (IMAPSession    *session,
 350                                  const gchar    *user,
 351                                  const gchar    *pass,
 352                                  const gchar    *type);
 353 static gint imap_cmd_noop       (IMAPSession    *session);
 354 #ifdef USE_GNUTLS
 355 static gint imap_cmd_starttls   (IMAPSession    *session);
 356 #endif
 357 static gint imap_cmd_select     (IMAPSession    *session,
 358                                  const gchar    *folder,
 359                                  gint           *exists,
 360                                  gint           *recent,
 361                                  gint           *unseen,
 362                                  guint32        *uid_validity,
 363                                  gint           *can_create_flags,
 364                                  GSList         **ok_flags,
 365                                  gboolean        block);
 366 static gint imap_cmd_close      (IMAPSession    *session);
 367 static gint imap_cmd_examine    (IMAPSession    *session,
 368                                  const gchar    *folder,
 369                                  gint           *exists,
 370                                  gint           *recent,
 371                                  gint           *unseen,
 372                                  guint32        *uid_validity,
 373                                  gboolean        block);
 374 static gint imap_cmd_create     (IMAPSession    *sock,
 375                                  const gchar    *folder);
 376 static gint imap_cmd_rename     (IMAPSession    *sock,
 377                                  const gchar    *oldfolder,
 378                                  const gchar    *newfolder);
 379 static gint imap_cmd_delete     (IMAPSession    *session,
 380                                  const gchar    *folder);
 381 static gint imap_cmd_fetch      (IMAPSession    *sock,
 382                                  guint32         uid,
 383                                  const gchar    *filename,
 384                                  gboolean        headers,
 385                                  gboolean        body);
 386 static gint imap_cmd_append     (IMAPSession    *session,
 387                                  IMAPFolderItem *item,
 388                                  const gchar    *destfolder,
 389                                  const gchar    *file,
 390                                  IMAPFlags       flags,
 391                                  guint32        *new_uid);
 392 static gint imap_cmd_copy       (IMAPSession *session,
 393                                  struct mailimap_set * set,
 394                                  const gchar *destfolder,
 395                                  struct mailimap_set ** source,
 396                                  struct mailimap_set ** dest);
 397 static gint imap_cmd_store      (IMAPSession    *session,
 398                                  IMAPFolderItem *item,
 399                                  struct mailimap_set * set,
 400                                  IMAPFlags flags,
 401                                  GSList *tags,
 402                                  int do_add);
 403 static gint imap_cmd_expunge    (IMAPSession    *session);
 404
 405 static void imap_path_separator_subst           (gchar          *str,
 406                                                  gchar           separator);
 407
 408 static gboolean imap_rename_folder_func         (GNode          *node,
 409                                                  gpointer        data);
 410 static gint imap_get_num_list                   (Folder         *folder,
 411                                                  FolderItem     *item,
 412                                                  GSList        **list,
 413                                                  gboolean       *old_uids_valid);
 414 static GSList *imap_get_msginfos                (Folder         *folder,
 415                                                  FolderItem     *item,
 416                                                  GSList         *msgnum_list);
 417 static MsgInfo *imap_get_msginfo                (Folder         *folder,
 418                                                  FolderItem     *item,
 419                                                  gint            num);
 420 static gboolean imap_scan_required              (Folder         *folder,
 421                                                  FolderItem     *item);
 422 static void imap_change_flags                   (Folder         *folder,
 423                                                  FolderItem     *item,
 424                                                  MsgInfo        *msginfo,
 425                                                  MsgPermFlags    newflags);
 426 static gint imap_get_flags                      (Folder         *folder,
 427                                                  FolderItem     *item,
 428                                                  MsgInfoList    *msglist,
 429                                                  GHashTable     *msgflags);
 430 static gchar *imap_folder_get_path              (Folder         *folder);
 431 static gchar *imap_item_get_path                (Folder         *folder,
 432                                                  FolderItem     *item);
 433 static MsgInfo *imap_parse_msg(const gchar *file, FolderItem *item);
 434
 435
 436 /* data types conversion libetpan <-> claws */
 437 static GSList * imap_list_from_lep(IMAPFolder * folder,
 438                                    clist * list, const gchar * real_path, gboolean all);
 439 static GSList * imap_get_lep_set_from_numlist(IMAPFolder *folder, MsgNumberList *numlist);
 440 static GSList * imap_get_lep_set_from_msglist(IMAPFolder *folder, MsgInfoList *msglist);
 441 static GSList * imap_uid_list_from_lep(clist * list, gint* length);
 442 static GSList * imap_uid_list_from_lep_tab(carray * list);
 443 static void imap_flags_hash_from_lep_uid_flags_tab(carray * list,
 444                                                    GHashTable * hash,
 445                                                    GHashTable *tags_hash);
 446 static MsgInfo *imap_envelope_from_lep(struct imap_fetch_env_info * info,
 447                                        FolderItem *item);
 448 static void imap_lep_set_free(GSList *seq_list);
 449 static struct mailimap_flag_list * imap_flag_to_lep(IMAPFolderItem *item, IMAPFlags flags, GSList *tags);
 450
 451 typedef struct _hashtable_data {
 452         GSList *msglist;
 453         IMAPFolderItem *item;
 454 } hashtable_data;
 455
 456 static FolderClass imap_class;
 457
 458 FolderClass *imap_get_class(void)
 459 {
 460         if (imap_class.idstr == NULL) {
 461                 imap_class.type = F_IMAP;
 462                 imap_class.idstr = "imap";
 463                 imap_class.uistr = "IMAP4";
 464                 imap_class.supports_server_search = TRUE;
 465
 466                 /* Folder functions */
 467                 imap_class.new_folder = imap_folder_new;
 468                 imap_class.destroy_folder = imap_folder_destroy;
 469                 imap_class.scan_tree = imap_scan_tree;
 470                 imap_class.create_tree = imap_create_tree;
 471
 472                 /* FolderItem functions */
 473                 imap_class.item_new = imap_folder_item_new;
 474                 imap_class.item_destroy = imap_folder_item_destroy;
 475                 imap_class.item_get_path = imap_item_get_path;
 476                 imap_class.create_folder = imap_create_folder;
 477                 imap_class.rename_folder = imap_rename_folder;
 478                 imap_class.remove_folder = imap_remove_folder;
 479                 imap_class.close = imap_close;
 480                 imap_class.get_num_list = imap_get_num_list;
 481                 imap_class.scan_required = imap_scan_required;
 482                 imap_class.set_xml = folder_set_xml;
 483                 imap_class.get_xml = folder_get_xml;
 484                 imap_class.item_set_xml = imap_item_set_xml;
 485                 imap_class.item_get_xml = imap_item_get_xml;
 486
 487                 /* Message functions */
 488                 imap_class.get_msginfo = imap_get_msginfo;
 489                 imap_class.get_msginfos = imap_get_msginfos;
 490                 imap_class.fetch_msg = imap_fetch_msg;
 491                 imap_class.fetch_msg_full = imap_fetch_msg_full;
 492                 imap_class.add_msg = imap_add_msg;
 493                 imap_class.add_msgs = imap_add_msgs;
 494                 imap_class.copy_msg = imap_copy_msg;
 495                 imap_class.copy_msgs = imap_copy_msgs;
 496                 imap_class.search_msgs = search_msgs;
 497                 imap_class.remove_msg = imap_remove_msg;
 498                 imap_class.remove_msgs = imap_remove_msgs;
 499                 imap_class.expunge = imap_expunge;
 500                 imap_class.remove_all_msg = imap_remove_all_msg;
 501                 imap_class.is_msg_changed = imap_is_msg_changed;
 502                 imap_class.change_flags = imap_change_flags;
 503                 imap_class.get_flags = imap_get_flags;
 504                 imap_class.set_batch = imap_set_batch;
 505                 imap_class.synchronise = imap_synchronise;
 506                 imap_class.remove_cached_msg = imap_remove_cached_msg;
 507                 imap_class.commit_tags = imap_commit_tags;
 508 #ifdef USE_PTREAD
 509                 pthread_mutex_init(&imap_mutex, NULL);
 510 #endif
 511         }
 512
 513         return &imap_class;
 514 }
 515
 516 static void imap_refresh_sensitivity (IMAPSession *session)
 517 {
 518         MainWindow *mainwin;
 519
 520         if (session->sens_update_block)
 521                 return;
 522         mainwin = mainwindow_get_mainwindow();
 523         if (mainwin) {
 524                 toolbar_main_set_sensitive(mainwin);
 525                 main_window_set_menu_sensitive(mainwin);
 526         }
 527 }
 528
 529 static void lock_session(IMAPSession *session)
 530 {
 531         if (session) {
 532                 debug_print("locking session %p (%d)\n", session, session->busy);
 533                 if (session->busy)
 534                         debug_print("         SESSION WAS LOCKED !!      \n");
 535                 session->busy = TRUE;
 536                 imap_refresh_sensitivity(session);
 537         } else {
 538                 debug_print("can't lock null session\n");
 539         }
 540 }
 541
 542 static void unlock_session(IMAPSession *session)
 543 {
 544         if (session) {
 545                 debug_print("unlocking session %p\n", session);
 546                 session->busy = FALSE;
 547                 imap_refresh_sensitivity(session);
 548         } else {
 549                 debug_print("can't unlock null session\n");
 550         }
 551 }
 552
 553 static gboolean imap_ping(gpointer data)
 554 {
 555         Session *session = (Session *)data;
 556         IMAPSession *imap_session = IMAP_SESSION(session);
 557         int r;
 558
 559         if (session->state != SESSION_READY)
 560                 return FALSE;
 561         if (imap_session->busy || !imap_session->authenticated)
 562                 return TRUE;
 563
 564         lock_session(imap_session);
 565         r = imap_cmd_noop(imap_session);
 566         unlock_session(imap_session);
 567
 568         return r == MAILIMAP_NO_ERROR;
 569 }
 570
 571 static void imap_disc_session_destroy(IMAPSession *session)
 572 {
 573         RemoteFolder *rfolder = NULL;
 574
 575         if (session == NULL)
 576                 return;
 577
 578         rfolder = REMOTE_FOLDER(IMAP_SESSION(session)->folder);
 579
 580         if (rfolder == NULL)
 581                 return;
 582         log_warning(LOG_PROTOCOL, _("IMAP4 connection broken\n"));
 583         SESSION(session)->state = SESSION_DISCONNECTED;
 584         SESSION(session)->sock = NULL;
 585 }
 586
 587 static void imap_safe_destroy(IMAPSession *session)
 588 {
 589         if (!session->busy)
 590                 session_destroy(SESSION(session));
 591         else
 592                 session->do_destroy = TRUE;
 593 }
 594
 595 static gboolean is_fatal(int libetpan_errcode)
 596 {
 597         switch(libetpan_errcode) {
 598         case MAILIMAP_ERROR_STREAM:
 599         case MAILIMAP_ERROR_PROTOCOL:
 600         case MAILIMAP_ERROR_PARSE:
 601         case MAILIMAP_ERROR_BAD_STATE:
 602                 return TRUE;
 603         default:
 604                 return FALSE;
 605         }
 606 }
 607
 608 static void imap_handle_error(Session *session, const gchar *server, int libetpan_errcode)
 609 {
 610         const gchar *session_server = (session ? session->server : NULL);
 611
 612         if (session_server == NULL)
 613                 session_server = server;
 614         if (session_server == NULL)
 615                 session_server = "(null)";
 616
 617         switch(libetpan_errcode) {
 618         case MAILIMAP_NO_ERROR:
 619                 return;
 620         case MAILIMAP_NO_ERROR_AUTHENTICATED:
 621                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("authenticated"), "\n", NULL), session_server);
 622                 break;
 623         case MAILIMAP_NO_ERROR_NON_AUTHENTICATED:
 624                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("not authenticated"), "\n", NULL), session_server);
 625                 break;
 626         case MAILIMAP_ERROR_BAD_STATE:
 627                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("bad state"), "\n", NULL), session_server);
 628                 break;
 629         case MAILIMAP_ERROR_STREAM:
 630                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("stream error"), "\n", NULL), session_server);
 631                 break;
 632         case MAILIMAP_ERROR_PARSE:
 633                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("parse error "
 634                                             "(very probably non-RFC compliance from the server)"), "\n", NULL), session_server);
 635                 break;
 636         case MAILIMAP_ERROR_CONNECTION_REFUSED:
 637                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("connection refused"), "\n", NULL), session_server);
 638                 break;
 639         case MAILIMAP_ERROR_MEMORY:
 640                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("memory error"), "\n", NULL), session_server);
 641                 break;
 642         case MAILIMAP_ERROR_FATAL:
 643                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("fatal error"), "\n", NULL), session_server);
 644                 break;
 645         case MAILIMAP_ERROR_PROTOCOL:
 646                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("protocol error "
 647                                             "(very probably non-RFC compliance from the server)"), "\n", NULL), session_server);
 648                 break;
 649         case MAILIMAP_ERROR_DONT_ACCEPT_CONNECTION:
 650                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("connection not accepted"), "\n", NULL), session_server);
 651                 break;
 652         case MAILIMAP_ERROR_APPEND:
 653                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("APPEND error"), "\n", NULL), session_server);
 654                 break;
 655         case MAILIMAP_ERROR_NOOP:
 656                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("NOOP error"), "\n", NULL), session_server);
 657                 break;
 658         case MAILIMAP_ERROR_LOGOUT:
 659                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("LOGOUT error"), "\n", NULL), session_server);
 660                 break;
 661         case MAILIMAP_ERROR_CAPABILITY:
 662                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("CAPABILITY error"), "\n", NULL), session_server);
 663                 break;
 664         case MAILIMAP_ERROR_CHECK:
 665                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("CHECK error"), "\n", NULL), session_server);
 666                 break;
 667         case MAILIMAP_ERROR_CLOSE:
 668                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("CLOSE error"), "\n", NULL), session_server);
 669                 break;
 670         case MAILIMAP_ERROR_EXPUNGE:
 671                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("EXPUNGE error"), "\n", NULL), session_server);
 672                 break;
 673         case MAILIMAP_ERROR_COPY:
 674                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("COPY error"), "\n", NULL), session_server);
 675                 break;
 676         case MAILIMAP_ERROR_UID_COPY:
 677                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("UID COPY error"), "\n", NULL), session_server);
 678                 break;
 679         case MAILIMAP_ERROR_CREATE:
 680                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("CREATE error"), "\n", NULL), session_server);
 681                 break;
 682         case MAILIMAP_ERROR_DELETE:
 683                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("DELETE error"), "\n", NULL), session_server);
 684                 break;
 685         case MAILIMAP_ERROR_EXAMINE:
 686                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("EXAMINE error"), "\n", NULL), session_server);
 687                 break;
 688         case MAILIMAP_ERROR_FETCH:
 689                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("FETCH error"), "\n", NULL), session_server);
 690                 break;
 691         case MAILIMAP_ERROR_UID_FETCH:
 692                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("UID FETCH error"), "\n", NULL), session_server);
 693                 break;
 694         case MAILIMAP_ERROR_LIST:
 695                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("LIST error"), "\n", NULL), session_server);
 696                 break;
 697         case MAILIMAP_ERROR_LOGIN:
 698                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("LOGIN error"), "\n", NULL), session_server);
 699                 break;
 700         case MAILIMAP_ERROR_LSUB:
 701                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("LSUB error"), "\n", NULL), session_server);
 702                 break;
 703         case MAILIMAP_ERROR_RENAME:
 704                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("RENAME error"), "\n", NULL), session_server);
 705                 break;
 706         case MAILIMAP_ERROR_SEARCH:
 707                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("SEARCH error"), "\n", NULL), session_server);
 708                 break;
 709         case MAILIMAP_ERROR_UID_SEARCH:
 710                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("UID SEARCH error"), "\n", NULL), session_server);
 711                 break;
 712         case MAILIMAP_ERROR_SELECT:
 713                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("SELECT error"), "\n", NULL), session_server);
 714                 break;
 715         case MAILIMAP_ERROR_STATUS:
 716                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("STATUS error"), "\n", NULL), session_server);
 717                 break;
 718         case MAILIMAP_ERROR_STORE:
 719                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("STORE error"), "\n", NULL), session_server);
 720                 break;
 721         case MAILIMAP_ERROR_UID_STORE:
 722                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("UID STORE error"), "\n", NULL), session_server);
 723                 break;
 724         case MAILIMAP_ERROR_SUBSCRIBE:
 725                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("SUBSCRIBE error"), "\n", NULL), session_server);
 726                 break;
 727         case MAILIMAP_ERROR_UNSUBSCRIBE:
 728                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("UNSUBSCRIBE error"), "\n", NULL), session_server);
 729                 break;
 730         case MAILIMAP_ERROR_STARTTLS:
 731                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("STARTTLS error"), "\n", NULL), session_server);
 732                 break;
 733         case MAILIMAP_ERROR_INVAL:
 734                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("INVAL error"), "\n", NULL), session_server);
 735                 break;
 736         case MAILIMAP_ERROR_EXTENSION:
 737                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("EXTENSION error"), "\n", NULL), session_server);
 738                 break;
 739         case MAILIMAP_ERROR_SASL:
 740                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("SASL error"), "\n", NULL), session_server);
 741                 break;
 742 #ifdef USE_GNUTLS
 743         case MAILIMAP_ERROR_SSL:
 744                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("SSL error"), "\n", NULL), session_server);
 745                 break;
 746 #endif
 747         default:
 748                 log_warning(LOG_PROTOCOL, g_strconcat(_("IMAP error on %s:"), " ", _("Unknown error [%d]"), "\n", NULL),
 749                         session_server, libetpan_errcode);
 750                 break;
 751         }
 752
 753         if (session && is_fatal(libetpan_errcode)) {
 754                 imap_disc_session_destroy(IMAP_SESSION(session));
 755         } else if (session && !is_fatal(libetpan_errcode)) {
 756                 if (IMAP_SESSION(session)->busy)
 757                         unlock_session(IMAP_SESSION(session));
 758         }
 759 }
 760
 761 static Folder *imap_folder_new(const gchar *name, const gchar *path)
 762 {
 763         Folder *folder;
 764
 765         folder = (Folder *)g_new0(IMAPFolder, 1);
 766         folder->klass = &imap_class;
 767         imap_folder_init(folder, name, path);
 768
 769         return folder;
 770 }
 771
 772 static void imap_folder_destroy(Folder *folder)
 773 {
 774         while (imap_folder_get_refcnt(folder) > 0)
 775                 gtk_main_iteration();
 776
 777         g_free(IMAP_FOLDER(folder)->search_charset);
 778
 779         folder_remote_folder_destroy(REMOTE_FOLDER(folder));
 780         imap_done(folder);
 781 }
 782
 783 static void imap_folder_init(Folder *folder, const gchar *name,
 784                              const gchar *path)
 785 {
 786         folder_remote_folder_init((Folder *)folder, name, path);
 787         IMAP_FOLDER(folder)->max_set_size = IMAP_SET_MAX_COUNT;
 788         IMAP_FOLDER(folder)->search_charset_supported = TRUE;
 789         IMAP_FOLDER(folder)->search_charset = g_strdup(conv_get_locale_charset_str_no_utf8());
 790 }
 791
 792 static FolderItem *imap_folder_item_new(Folder *folder)
 793 {
 794         IMAPFolderItem *item;
 795
 796         item = g_new0(IMAPFolderItem, 1);
 797         item->lastuid = 0;
 798         item->uid_next = 0;
 799         item->uid_list = NULL;
 800
 801         return (FolderItem *)item;
 802 }
 803
 804 static void imap_folder_item_destroy(Folder *folder, FolderItem *_item)
 805 {
 806         IMAPFolderItem *item = (IMAPFolderItem *)_item;
 807
 808         g_return_if_fail(item != NULL);
 809         g_slist_free(item->uid_list);
 810
 811         g_free(_item);
 812 }
 813
 814 static gboolean imap_reset_uid_lists_func(GNode *node, gpointer data)
 815 {
 816         IMAPFolderItem *item = (IMAPFolderItem *)node->data;
 817
 818         item->lastuid = 0;
 819         g_slist_free(item->uid_list);
 820         item->uid_list = NULL;
 821
 822         return FALSE;
 823 }
 824
 825 static void imap_reset_uid_lists(Folder *folder)
 826 {
 827         if(folder->node == NULL)
 828                 return;
 829
 830         /* Destroy all uid lists and rest last uid */
 831         g_node_traverse(folder->node, G_IN_ORDER, G_TRAVERSE_ALL, -1, imap_reset_uid_lists_func, NULL);
 832 }
 833
 834 static int imap_get_capabilities(IMAPSession *session)
 835 {
 836         struct mailimap_capability_data *capabilities = NULL;
 837         clistiter *cur;
 838         int result;
 839
 840         if (session->capability != NULL)
 841                 return MAILIMAP_NO_ERROR;
 842
 843         result = imap_threaded_capability(session->folder, &capabilities);
 844
 845         if (result != MAILIMAP_NO_ERROR) {
 846                 return result;
 847         }
 848
 849         if (capabilities == NULL || capabilities->cap_list == NULL) {
 850                 return MAILIMAP_NO_ERROR;
 851         }
 852
 853         for(cur = clist_begin(capabilities->cap_list) ; cur != NULL ;
 854             cur = clist_next(cur)) {
 855                 struct mailimap_capability * cap =
 856                         clist_content(cur);
 857                 if (!cap || cap->cap_data.cap_name == NULL)
 858                         continue;
 859                 session->capability = g_slist_append
 860                                 (session->capability,
 861                                  g_strdup(cap->cap_data.cap_name));
 862                 debug_print("got capa %s\n", cap->cap_data.cap_name);
 863         }
 864         mailimap_capability_data_free(capabilities);
 865         return MAILIMAP_NO_ERROR;
 866 }
 867
 868 static gboolean imap_has_capability(IMAPSession *session, const gchar *cap)
 869 {
 870         GSList *cur;
 871         for (cur = session->capability; cur; cur = cur->next) {
 872                 if (!g_ascii_strcasecmp(cur->data, cap))
 873                         return TRUE;
 874         }
 875         return FALSE;
 876 }
 877
 878 static gint imap_auth(IMAPSession *session, const gchar *user, const gchar *pass,
 879                       IMAPAuthType type)
 880 {
 881         gint ok = MAILIMAP_ERROR_LOGIN;
 882         static time_t last_login_err = 0;
 883         gchar *ext_info = "";
 884         int r;
 885         gchar *server = NULL;
 886         if ((r = imap_get_capabilities(session)) != MAILIMAP_NO_ERROR) {
 887                 imap_handle_error(SESSION(session), NULL, r);
 888                 return r;
 889         }
 890         server = g_strdup(SESSION(session)->server);
 891         switch(type) {
 892         case IMAP_AUTH_ANON:
 893                 ok = imap_cmd_login(session, user, pass, "ANONYMOUS");
 894                 break;
 895         case IMAP_AUTH_CRAM_MD5:
 896                 ok = imap_cmd_login(session, user, pass, "CRAM-MD5");
 897                 break;
 898         case IMAP_AUTH_DIGEST_MD5:
 899                 ok = imap_cmd_login(session, user, pass, "DIGEST-MD5");
 900                 break;
 901         case IMAP_AUTH_SCRAM_SHA1:
 902                 ok = imap_cmd_login(session, user, pass, "SCRAM-SHA-1");
 903                 break;
 904         case IMAP_AUTH_PLAIN:
 905                 ok = imap_cmd_login(session, user, pass, "PLAIN");
 906                 break;
 907         case IMAP_AUTH_LOGIN:
 908                 ok = imap_cmd_login(session, user, pass, "LOGIN");
 909                 break;
 910         case IMAP_AUTH_PLAINTEXT:
 911                 ok = imap_cmd_login(session, user, pass, "plaintext");
 912                 break;
 913         case IMAP_AUTH_GSSAPI:
 914                 ok = imap_cmd_login(session, user, pass, "GSSAPI");
 915                 break;
 916         default:
 917                 debug_print("capabilities:\n"
 918                                 "\t ANONYMOUS %d\n"
 919                                 "\t CRAM-MD5 %d\n"
 920                                 "\t DIGEST-MD5 %d\n"
 921                                 "\t SCRAM-SHA-1 %d\n"
 922                                 "\t PLAIN %d\n"
 923                                 "\t LOGIN %d\n"
 924                                 "\t GSSAPI %d\n",
 925                         imap_has_capability(session, "ANONYMOUS"),
 926                         imap_has_capability(session, "CRAM-MD5"),
 927                         imap_has_capability(session, "DIGEST-MD5"),
 928                         imap_has_capability(session, "SCRAM-SHA-1"),
 929                         imap_has_capability(session, "PLAIN"),
 930                         imap_has_capability(session, "LOGIN"),
 931                         imap_has_capability(session, "GSSAPI"));
 932                 if (imap_has_capability(session, "CRAM-MD5"))
 933                         ok = imap_cmd_login(session, user, pass, "CRAM-MD5");
 934                 if (ok == MAILIMAP_ERROR_LOGIN && imap_has_capability(session, "DIGEST-MD5"))
 935                         ok = imap_cmd_login(session, user, pass, "DIGEST-MD5");
 936                 if (ok == MAILIMAP_ERROR_LOGIN && imap_has_capability(session, "SCRAM-SHA-1"))
 937                         ok = imap_cmd_login(session, user, pass, "SCRAM-SHA-1");
 938                 if (ok == MAILIMAP_ERROR_LOGIN && imap_has_capability(session, "PLAIN"))
 939                         ok = imap_cmd_login(session, user, pass, "PLAIN");
 940                 if (ok == MAILIMAP_ERROR_LOGIN && imap_has_capability(session, "LOGIN"))
 941                         ok = imap_cmd_login(session, user, pass, "LOGIN");
 942                 if (ok == MAILIMAP_ERROR_LOGIN && imap_has_capability(session, "GSSAPI"))
 943                         ok = imap_cmd_login(session, user, pass, "GSSAPI");
 944                 if (ok == MAILIMAP_ERROR_LOGIN) /* we always try plaintext login before giving up */
 945                         ok = imap_cmd_login(session, user, pass, "plaintext");
 946         }
 947
 948         if (ok == MAILIMAP_NO_ERROR)
 949                 session->authenticated = TRUE;
 950         else {
 951                 if (type == IMAP_AUTH_CRAM_MD5) {
 952                         ext_info = _("\n\nCRAM-MD5 logins only work if libetpan has been "
 953                                      "compiled with SASL support and the "
 954                                      "CRAM-MD5 SASL plugin is installed.");
 955                 }
 956
 957                 if (type == IMAP_AUTH_DIGEST_MD5) {
 958                         ext_info = _("\n\nDIGEST-MD5 logins only work if libetpan has been "
 959                                      "compiled with SASL support and the "
 960                                      "DIGEST-MD5 SASL plugin is installed.");
 961                 }
 962
 963                 if (type == IMAP_AUTH_SCRAM_SHA1) {
 964                         ext_info = _("\n\nSCRAM-SHA-1 logins only work if libetpan has been "
 965                                      "compiled with SASL support and the "
 966                                      "SCRAM SASL plugin is installed.");
 967                 }
 968
 969                 if (type == IMAP_AUTH_PLAIN) {
 970                         ext_info = _("\n\nPLAIN logins only work if libetpan has been "
 971                                      "compiled with SASL support and the "
 972                                      "PLAIN SASL plugin is installed.");
 973                 }
 974
 975                 if (type == IMAP_AUTH_LOGIN) {
 976                         ext_info = _("\n\nLOGIN logins only work if libetpan has been "
 977                                      "compiled with SASL support and the "
 978                                      "LOGIN SASL plugin is installed.");
 979                 }
 980
 981                 if (time(NULL) - last_login_err > 10) {
 982                         if (!prefs_common.no_recv_err_panel) {
 983                                 alertpanel_error_log(_("Connection to %s failed: "
 984                                         "login refused.%s"),
 985                                         server, ext_info);
 986                         } else {
 987                                 log_error(LOG_PROTOCOL, _("Connection to %s failed: "
 988                                         "login refused.%s\n"),
 989                                         server, ext_info);
 990                         }
 991                 }
 992                 last_login_err = time(NULL);
 993         }
 994         g_free(server);
 995         return ok;
 996 }
 997
 998 static IMAPSession *imap_reconnect_if_possible(Folder *folder, IMAPSession *session)
 999 {
1000         RemoteFolder *rfolder = REMOTE_FOLDER(folder);
1001         /* Check if this is the first try to establish a
1002            connection, if yes we don't try to reconnect */
1003         debug_print("reconnecting\n");
1004         if (rfolder->session == NULL) {
1005                 log_warning(LOG_PROTOCOL, _("Connecting to %s failed"),
1006                             folder->account->recv_server);
1007                 SESSION(session)->sock = NULL;
1008                 imap_safe_destroy(session);
1009                 session = NULL;
1010         } else {
1011                 rfolder->session = NULL;
1012                 log_warning(LOG_PROTOCOL, _("IMAP4 connection to %s has been"
1013                             " disconnected. Reconnecting...\n"),
1014                             folder->account->recv_server);
1015                 statusbar_print_all(_("IMAP4 connection to %s has been"
1016                             " disconnected. Reconnecting...\n"),
1017                             folder->account->recv_server);
1018                 SESSION(session)->state = SESSION_DISCONNECTED;
1019                 SESSION(session)->sock = NULL;
1020                 imap_safe_destroy(session);
1021                 /* Clear folders session to make imap_session_get create
1022                    a new session, because of rfolder->session == NULL
1023                    it will not try to reconnect again and so avoid an
1024                    endless loop */
1025                 debug_print("getting session...\n");
1026                 session = imap_session_get(folder);
1027                 rfolder->session = SESSION(session);
1028                 statusbar_pop_all();
1029         }
1030         return session;
1031 }
1032
1033 static IMAPSession *imap_session_get(Folder *folder)
1034 {
1035         RemoteFolder *rfolder = REMOTE_FOLDER(folder);
1036         IMAPSession *session = NULL;
1037         gint r = MAILIMAP_NO_ERROR;
1038
1039         g_return_val_if_fail(folder != NULL, NULL);
1040         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, NULL);
1041         g_return_val_if_fail(folder->account != NULL, NULL);
1042
1043         if (prefs_common.work_offline &&
1044             !inc_offline_should_override(FALSE,
1045                 _("Claws Mail needs network access in order "
1046                   "to access the IMAP server."))) {
1047                 return NULL;
1048         }
1049
1050         /* check for deferred destroy */
1051         if (rfolder->session != NULL) {
1052                 session = IMAP_SESSION(rfolder->session);
1053                 if (!session->busy && session->do_destroy) {
1054                         rfolder->session = NULL;
1055                         imap_safe_destroy(session);
1056                         session = NULL;
1057                 }
1058         }
1059
1060         /* Make sure we have a session */
1061         if (rfolder->session != NULL && rfolder->session->state != SESSION_DISCONNECTED) {
1062                 session = IMAP_SESSION(rfolder->session);
1063         } else if (rfolder->session != NULL && rfolder->session->state == SESSION_DISCONNECTED) {
1064                 imap_safe_destroy(IMAP_SESSION(rfolder->session));
1065                 rfolder->session = NULL;
1066                 goto new_conn;
1067         } else if (rfolder->connecting) {
1068                 debug_print("already connecting\n");
1069                 return NULL;
1070         } else {
1071 new_conn:
1072                 imap_reset_uid_lists(folder);
1073                 if (time(NULL) - rfolder->last_failure <= 2)
1074                         return NULL;
1075                 rfolder->connecting = TRUE;
1076                 session = imap_session_new(folder, folder->account);
1077         }
1078         if(session == NULL) {
1079                 rfolder->last_failure = time(NULL);
1080                 rfolder->connecting = FALSE;
1081                 return NULL;
1082         }
1083
1084         /* Make sure session is authenticated */
1085         if (!IMAP_SESSION(session)->authenticated)
1086                 r = imap_session_authenticate(IMAP_SESSION(session), folder->account);
1087
1088         if (r != MAILIMAP_NO_ERROR || (!is_fatal(r) && !IMAP_SESSION(session)->authenticated)) {
1089                 rfolder->session = NULL;
1090                 if (!is_fatal(r)) {
1091                         imap_threaded_disconnect(session->folder);
1092                 }
1093                 SESSION(session)->state = SESSION_DISCONNECTED;
1094                 SESSION(session)->sock = NULL;
1095                 imap_safe_destroy(session);
1096                 rfolder->last_failure = time(NULL);
1097                 rfolder->connecting = FALSE;
1098                 return NULL;
1099         }
1100
1101         /* I think the point of this code is to avoid sending a
1102          * keepalive if we've used the session recently and therefore
1103          * think it's still alive.  Unfortunately, most of the code
1104          * does not yet check for errors on the socket, and so if the
1105          * connection drops we don't notice until the timeout expires.
1106          * A better solution than sending a NOOP every time would be
1107          * for every command to be prepared to retry until it is
1108          * successfully sent. -- mbp */
1109         if ((time(NULL) - SESSION(session)->last_access_time > SESSION_TIMEOUT_INTERVAL) || session->cancelled) {
1110                 /* verify that the session is still alive */
1111                 r = imap_cmd_noop(session);
1112
1113                 if (r != MAILIMAP_NO_ERROR) {
1114                         debug_print("disconnected!\n");
1115                         if (!is_fatal(r))
1116                                 session = imap_reconnect_if_possible(folder, session);
1117                         else {
1118                                 rfolder->session = NULL;
1119                                 rfolder->connecting = FALSE;
1120                                 SESSION(session)->state = SESSION_DISCONNECTED;
1121                                 SESSION(session)->sock = NULL;
1122                                 imap_safe_destroy(session);
1123                                 session = imap_session_get(folder);
1124                         }
1125                 }
1126                 if (session)
1127                         session->cancelled = FALSE;
1128         }
1129
1130         rfolder->session = SESSION(session);
1131         rfolder->connecting = FALSE;
1132
1133         return IMAP_SESSION(session);
1134 }
1135
1136 static IMAPSession *imap_session_new(Folder * folder,
1137                                      const PrefsAccount *account)
1138 {
1139         IMAPSession *session;
1140         gushort port;
1141         int r;
1142         int authenticated = FALSE;
1143         gchar *buf;
1144
1145 #ifdef USE_GNUTLS
1146         /* FIXME: IMAP over SSL only... */
1147         SSLType ssl_type;
1148
1149         port = account->set_imapport ? account->imapport
1150                 : account->ssl_imap == SSL_TUNNEL ? IMAPS_PORT : IMAP4_PORT;
1151         ssl_type = account->ssl_imap;
1152 #else
1153         if (account->ssl_imap != SSL_NONE) {
1154                 if (alertpanel_full(_("Insecure connection"),
1155                         _("This connection is configured to be secured "
1156                           "using SSL, but SSL is not available in this "
1157                           "build of Claws Mail. \n\n"
1158                           "Do you want to continue connecting to this "
1159                           "server? The communication would not be "
1160                           "secure."),
1161                           GTK_STOCK_CANCEL, _("Con_tinue connecting"),
1162                           NULL, FALSE, NULL, ALERT_WARNING,
1163                           G_ALERTDEFAULT) != G_ALERTALTERNATE)
1164                         return NULL;
1165         }
1166         port = account->set_imapport ? account->imapport
1167                 : IMAP4_PORT;
1168 #endif
1169
1170         imap_init(folder);
1171         buf = g_strdup_printf(_("Account '%s': Connecting to IMAP4 server: %s:%d..."),
1172                                 folder->account->account_name, folder->account->recv_server,
1173                                 port);
1174         statuswindow_print_all("%s", buf);
1175         log_message(LOG_PROTOCOL, "%s\n", buf);
1176         g_free(buf);
1177
1178 #ifndef G_OS_WIN32
1179         if (account->set_tunnelcmd) {
1180                 r = imap_threaded_connect_cmd(folder,
1181                                               account->tunnelcmd,
1182                                               account->recv_server,
1183                                               port);
1184         }
1185         else
1186 #endif
1187         {
1188 #ifdef USE_GNUTLS
1189                 if (ssl_type == SSL_TUNNEL) {
1190                         r = imap_threaded_connect_ssl(folder,
1191                                                       account->recv_server,
1192                                                       port);
1193                 }
1194                 else
1195 #endif
1196                 {
1197                         r = imap_threaded_connect(folder,
1198                                                   account->recv_server,
1199                                                   port);
1200                 }
1201         }
1202
1203         statuswindow_pop_all();
1204         if (r == MAILIMAP_NO_ERROR_AUTHENTICATED) {
1205                 authenticated = TRUE;
1206         }
1207         else if (r == MAILIMAP_NO_ERROR_NON_AUTHENTICATED) {
1208                 authenticated = FALSE;
1209         }
1210         else {
1211 #ifdef USE_GNUTLS
1212                 if (r == MAILIMAP_ERROR_SSL)
1213                         log_error(LOG_PROTOCOL, _("SSL handshake failed\n"));
1214                 else
1215 #endif
1216                         imap_handle_error(NULL, account->recv_server, r);
1217
1218                 if(!prefs_common.no_recv_err_panel) {
1219                         alertpanel_error_log(_("Can't connect to IMAP4 server: %s:%d"),
1220                                          account->recv_server, port);
1221                 } else {
1222                         log_error(LOG_PROTOCOL, _("Can't connect to IMAP4 server: %s:%d\n"),
1223                                          account->recv_server, port);
1224                 }
1225
1226                 return NULL;
1227         }
1228
1229         session = g_new0(IMAPSession, 1);
1230         session_init(SESSION(session), account, FALSE);
1231         SESSION(session)->type             = SESSION_IMAP;
1232         SESSION(session)->server           = g_strdup(account->recv_server);
1233         SESSION(session)->port             = port;
1234         SESSION(session)->sock             = NULL;
1235
1236         SESSION(session)->destroy          = imap_session_destroy;
1237
1238         session->capability = NULL;
1239
1240         session->authenticated = authenticated;
1241         session->mbox = NULL;
1242         session->exists = 0;
1243         session->recent = 0;
1244         session->expunge = 0;
1245         session->cmd_count = 0;
1246         session->folder = folder;
1247         IMAP_FOLDER(session->folder)->last_seen_separator = 0;
1248
1249 #ifdef USE_GNUTLS
1250         if (account->ssl_imap == SSL_STARTTLS) {
1251                 gint ok;
1252
1253                 ok = imap_cmd_starttls(session);
1254                 if (ok != MAILIMAP_NO_ERROR) {
1255                         log_warning(LOG_PROTOCOL, _("Can't start TLS session.\n"));
1256                         if (!is_fatal(ok)) {
1257                                 SESSION(session)->sock = NULL;
1258                                 imap_safe_destroy(session);
1259                         }
1260                         return NULL;
1261                 }
1262
1263                 imap_free_capabilities(session);
1264                 session->authenticated = FALSE;
1265                 session->uidplus = FALSE;
1266                 session->cmd_count = 1;
1267         }
1268 #endif
1269         log_message(LOG_PROTOCOL, "IMAP connection is %s-authenticated\n",
1270                     (session->authenticated) ? "pre" : "un");
1271
1272         session_register_ping(SESSION(session), imap_ping);
1273
1274         return session;
1275 }
1276
1277 static gint imap_session_authenticate(IMAPSession *session,
1278                                       PrefsAccount *account)
1279 {
1280         gchar *pass, *acc_pass = NULL;
1281         gboolean failed = FALSE;
1282         gint ok = MAILIMAP_NO_ERROR;
1283         g_return_val_if_fail(account->userid != NULL, MAILIMAP_ERROR_BAD_STATE);
1284
1285         if (!password_get(account->userid, account->recv_server, "imap",
1286                          SESSION(session)->port, &acc_pass)) {
1287                 acc_pass = passwd_store_get_account(account->account_id,
1288                                 PWS_ACCOUNT_RECV);
1289         }
1290
1291 try_again:
1292         pass = acc_pass;
1293         if (!pass && account->imap_auth_type != IMAP_AUTH_ANON && account->imap_auth_type != IMAP_AUTH_GSSAPI) {
1294                 gchar *tmp_pass;
1295                 tmp_pass = input_dialog_query_password_keep(account->recv_server,
1296                                                             account->userid,
1297                                                             &(account->session_passwd));
1298                 if (!tmp_pass) {
1299                         return MAILIMAP_NO_ERROR;
1300                 }
1301                 Xstrdup_a(pass, tmp_pass, {g_free(tmp_pass); return MAILIMAP_NO_ERROR;});
1302                 g_free(tmp_pass);
1303         } else if (account->imap_auth_type == IMAP_AUTH_ANON || account->imap_auth_type == IMAP_AUTH_GSSAPI) {
1304                 pass = "";
1305         }
1306         if ((ok = imap_auth(session, account->userid, pass, account->imap_auth_type)) != MAILIMAP_NO_ERROR) {
1307
1308                 if (!failed && !is_fatal(ok)) {
1309                         if (acc_pass != NULL) {
1310                                 memset(acc_pass, 0, strlen(acc_pass));
1311                                 g_free(acc_pass);
1312                                 acc_pass = NULL;
1313                         }
1314                         failed = TRUE;
1315                         if (account->session_passwd != NULL) {
1316                                 g_free(account->session_passwd);
1317                                 account->session_passwd = NULL;
1318                         }
1319                         goto try_again;
1320                 } else {
1321                         if (prefs_common.no_recv_err_panel) {
1322                                 log_error(LOG_PROTOCOL, _("Couldn't login to IMAP server %s.\n"), account->recv_server);
1323                                 mainwindow_show_error();
1324                         } else
1325                                 alertpanel_error_log(_("Couldn't login to IMAP server %s."), account->recv_server);
1326                 }
1327
1328                 if (acc_pass != NULL) {
1329                         g_free(acc_pass);
1330                         memset(acc_pass, 0, strlen(acc_pass));
1331                 }
1332
1333                 return ok;
1334         }
1335
1336         if (acc_pass) {
1337                 memset(acc_pass, 0, strlen(acc_pass));
1338                 g_free(acc_pass);
1339         }
1340         statuswindow_pop_all();
1341         session->authenticated = TRUE;
1342         return MAILIMAP_NO_ERROR;
1343 }
1344
1345 static void imap_session_destroy(Session *session)
1346 {
1347         if (session->state != SESSION_DISCONNECTED)
1348                 imap_threaded_disconnect(IMAP_SESSION(session)->folder);
1349
1350         imap_free_capabilities(IMAP_SESSION(session));
1351         g_free(IMAP_SESSION(session)->mbox);
1352 }
1353
1354 static gchar *imap_fetch_msg(Folder *folder, FolderItem *item, gint uid)
1355 {
1356         return imap_fetch_msg_full(folder, item, uid, TRUE, TRUE);
1357 }
1358
1359 static guint get_file_size_with_crs(const gchar *filename)
1360 {
1361         FILE *fp = NULL;
1362         guint cnt = 0;
1363         gchar buf[4096];
1364
1365         if (filename == NULL)
1366                 return -1;
1367
1368         fp = g_fopen(filename, "rb");
1369         if (!fp)
1370                 return -1;
1371
1372         while (fgets(buf, sizeof (buf), fp) != NULL) {
1373                 cnt += strlen(buf);
1374                 if (!strstr(buf, "\r\n") && strstr(buf, "\n"))
1375                         cnt++;
1376         }
1377
1378         fclose(fp);
1379         return cnt;
1380 }
1381
1382 static gchar *imap_get_cached_filename(FolderItem *item, guint msgnum)
1383 {
1384         gchar *path, *filename;
1385
1386         cm_return_val_if_fail(item != NULL, NULL);
1387
1388         path = folder_item_get_path(item);
1389
1390         if (!is_dir_exist(path)) {
1391                 g_free(path);
1392                 return NULL;
1393         }
1394
1395         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(msgnum), NULL);
1396
1397         if (is_dir_exist(filename)) {
1398                 g_free(filename);
1399                 filename = g_strconcat(path, G_DIR_SEPARATOR_S, ".", itos(msgnum), NULL);
1400         }
1401         g_free(path);
1402
1403         return filename;
1404 }
1405
1406 static void imap_remove_cached_msg(Folder *folder, FolderItem *item, MsgInfo *msginfo)
1407 {
1408         gchar *filename;
1409
1410         filename = imap_get_cached_filename(item, msginfo->msgnum);
1411
1412         cm_return_if_fail(filename != NULL);
1413
1414         if (is_file_exist(filename)) {
1415                 claws_unlink(filename);
1416         }
1417         g_free(filename);
1418 }
1419
1420 typedef struct _TagsData {
1421         gchar *str;
1422         GSList *msglist;
1423         IMAPFolderItem *item;
1424 } TagsData;
1425
1426 static void imap_commit_tags(FolderItem *item, MsgInfo *msginfo, GSList *tags_set, GSList *tags_unset)
1427 {
1428         IMAPSession *session;
1429         gint ok, can_create_tags;
1430         Folder *folder = NULL;
1431         TagsData *ht_data = NULL;
1432         GSList *cur;
1433
1434         g_return_if_fail(item != NULL);
1435         g_return_if_fail(msginfo != NULL);
1436
1437         folder = item->folder;
1438         debug_print("getting session...\n");
1439         session = imap_session_get(folder);
1440
1441         if (!session) {
1442                 debug_print("can't get session\n");
1443                 return;
1444         }
1445
1446         ok = imap_select(session, IMAP_FOLDER(folder), item,
1447                          NULL, NULL, NULL, NULL, &can_create_tags, FALSE);
1448
1449         if (ok != MAILIMAP_NO_ERROR) {
1450                 return;
1451         }
1452
1453
1454         if (IMAP_FOLDER_ITEM(item)->can_create_flags != ITEM_CAN_CREATE_FLAGS)
1455                 return;
1456
1457         if (IMAP_FOLDER_ITEM(item)->batching) {
1458                 /* instead of performing an UID STORE command for each message change,
1459                  * as a lot of them can change "together", we just fill in hashtables
1460                  * and defer the treatment so that we're able to send only one
1461                  * command.
1462                  */
1463                 debug_print("IMAP batch mode on, deferring tags change\n");
1464                 for (cur = tags_set; cur; cur = cur->next) {
1465                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1466                         if (cur_tag) {
1467                                 ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->tags_set_table,
1468                                         GINT_TO_POINTER(cur_tag));
1469                                 if (ht_data == NULL) {
1470                                         ht_data = g_new0(TagsData, 1);
1471                                         ht_data->str = g_strdup(tags_get_tag(cur_tag));
1472                                         ht_data->item = IMAP_FOLDER_ITEM(item);
1473                                         g_hash_table_insert(IMAP_FOLDER_ITEM(item)->tags_set_table,
1474                                                 GINT_TO_POINTER(cur_tag), ht_data);
1475                                 }
1476                                 ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
1477                         }
1478                 }
1479                 for (cur = tags_unset; cur; cur = cur->next) {
1480                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1481                         if (cur_tag) {
1482                                 ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->tags_unset_table,
1483                                         GINT_TO_POINTER(cur_tag));
1484                                 if (ht_data == NULL) {
1485                                         ht_data = g_new0(TagsData, 1);
1486                                         ht_data->str = g_strdup(tags_get_tag(cur_tag));
1487                                         ht_data->item = IMAP_FOLDER_ITEM(item);
1488                                         g_hash_table_insert(IMAP_FOLDER_ITEM(item)->tags_unset_table,
1489                                                 GINT_TO_POINTER(cur_tag), ht_data);
1490                                 }
1491                                 ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
1492                         }
1493                 }
1494         } else {
1495                 GSList *list_set = NULL;
1496                 GSList *list_unset = NULL;
1497                 GSList numlist;
1498
1499                 numlist.data = GINT_TO_POINTER(msginfo->msgnum);
1500                 numlist.next = NULL;
1501
1502                 debug_print("IMAP changing tags NOW\n");
1503                 for (cur = tags_set; cur; cur = cur->next) {
1504                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1505                         const gchar *str = tags_get_tag(cur_tag);
1506                         if (IS_NOT_RESERVED_TAG(str))
1507                                 list_set = g_slist_prepend(list_set, g_strdup(str));
1508                 }
1509                 if (list_set) {
1510                         ok = imap_set_message_flags(session,
1511                                 IMAP_FOLDER_ITEM(item), &numlist, 0, list_set, TRUE);
1512                         slist_free_strings_full(list_set);
1513                         if (ok != MAILIMAP_NO_ERROR) {
1514                                 return;
1515                         }
1516                 }
1517
1518                 for (cur = tags_unset; cur; cur = cur->next) {
1519                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1520                         const gchar *str = tags_get_tag(cur_tag);
1521                         if (IS_NOT_RESERVED_TAG(str))
1522                                 list_unset = g_slist_prepend(list_unset, g_strdup(str));
1523                 }
1524                 if (list_unset) {
1525                         ok = imap_set_message_flags(session,
1526                                 IMAP_FOLDER_ITEM(item), &numlist, 0, list_unset, FALSE);
1527                         slist_free_strings_full(list_unset);
1528                         if (ok != MAILIMAP_NO_ERROR) {
1529                                 return;
1530                         }
1531                 }
1532         }
1533 }
1534
1535 static gchar *imap_fetch_msg_full(Folder *folder, FolderItem *item, gint uid,
1536                                   gboolean headers, gboolean body)
1537 {
1538         gchar *path, *filename;
1539         IMAPSession *session;
1540         gint ok;
1541
1542         g_return_val_if_fail(folder != NULL, NULL);
1543         g_return_val_if_fail(item != NULL, NULL);
1544
1545         if (uid == 0)
1546                 return NULL;
1547
1548         path = folder_item_get_path(item);
1549         if (!is_dir_exist(path)) {
1550                 if(is_file_exist(path))
1551                         claws_unlink(path);
1552                 make_dir_hier(path);
1553         }
1554         g_free(path);
1555
1556         filename = imap_get_cached_filename(item, uid);
1557         debug_print("trying to fetch cached %s\n", filename);
1558
1559         if (is_file_exist(filename)) {
1560                 /* see whether the local file represents the whole message
1561                  * or not. As the IMAP server reports size with \r chars,
1562                  * we have to update the local file (UNIX \n only) size */
1563                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1564                 guint have_size = -1;
1565
1566                 if (cached)
1567                         debug_print("message %d has been already %scached.\n", uid,
1568                                 MSG_IS_FULLY_CACHED(cached->flags) ? "fully ":"");
1569
1570                 if (!cached || !MSG_IS_FULLY_CACHED(cached->flags)) {
1571                         have_size = get_file_size_with_crs(filename);
1572                         if (cached && (cached->size <= have_size || !body)) {
1573                                 ok = file_strip_crs(filename);
1574                                 if (ok == 0 && cached && cached->size <= have_size) {
1575                                         /* we have it all and stripped */
1576                                         debug_print("...fully cached in fact (%u/%zd); setting flag.\n",
1577                                                         have_size, cached->size);
1578                                         procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1579                                 }
1580                                 procmsg_msginfo_free(&cached);
1581                                 return filename;
1582                         } else if (!cached && time(NULL) - get_file_mtime(filename) < 60) {
1583                                 debug_print("message not cached and file recent, considering file complete\n");
1584                                 ok = file_strip_crs(filename);
1585                                 if (ok == 0)
1586                                         return filename;
1587                         } else {
1588                                 procmsg_msginfo_free(&cached);
1589                         }
1590                 }
1591                 if (cached && MSG_IS_FULLY_CACHED(cached->flags)) {
1592                         procmsg_msginfo_free(&cached);
1593                         return filename;
1594                 }
1595         } else {
1596                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1597                 if (cached) {
1598                         procmsg_msginfo_unset_flags(cached, MSG_FULLY_CACHED, 0);
1599                         procmsg_msginfo_free(&cached);
1600                 }
1601         }
1602
1603         debug_print("getting session...\n");
1604         session = imap_session_get(folder);
1605
1606         if (!session) {
1607                 g_free(filename);
1608                 return NULL;
1609         }
1610         session_set_access_time(SESSION(session));
1611         lock_session(session); /* unlocked later in the function */
1612
1613         debug_print("IMAP fetching messages\n");
1614         ok = imap_select(session, IMAP_FOLDER(folder), item,
1615                          NULL, NULL, NULL, NULL, NULL, FALSE);
1616         if (ok != MAILIMAP_NO_ERROR) {
1617                 g_warning("can't select mailbox %s", item->path);
1618                 g_free(filename);
1619                 return NULL;
1620         }
1621
1622         session_set_access_time(SESSION(session));
1623
1624         debug_print("getting message %d...\n", uid);
1625         ok = imap_cmd_fetch(session, (guint32)uid, filename, headers, body);
1626
1627         if (ok != MAILIMAP_NO_ERROR) {
1628                 g_warning("can't fetch message %d", uid);
1629                 g_free(filename);
1630                 return NULL;
1631         }
1632
1633         session_set_access_time(SESSION(session));
1634         unlock_session(session);
1635
1636         ok = file_strip_crs(filename);
1637
1638         if (ok == 0 && headers && body) {
1639                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1640                 if (cached) {
1641                         procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1642                         procmsg_msginfo_free(&cached);
1643                 }
1644         } else if (ok == -1) {
1645                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1646                 if (cached) {
1647                         procmsg_msginfo_unset_flags(cached, MSG_FULLY_CACHED, 0);
1648                         procmsg_msginfo_free(&cached);
1649                 }
1650         }
1651         return filename;
1652 }
1653
1654 static gboolean imap_is_msg_fully_cached(Folder *folder, FolderItem *item, gint uid)
1655 {
1656         gchar *filename;
1657         guint size = 0;
1658         MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1659
1660         if (!cached)
1661                 return FALSE;
1662
1663         if (MSG_IS_FULLY_CACHED(cached->flags)) {
1664                 procmsg_msginfo_free(&cached);
1665                 return TRUE;
1666         }
1667
1668         filename = imap_get_cached_filename(item, uid);
1669
1670         if (is_file_exist(filename)) {
1671                 if (cached && cached->total_size == cached->size) {
1672                         /* fast path */
1673                         g_free(filename);
1674                         procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1675                         return TRUE;
1676                 }
1677                 size = get_file_size_with_crs(filename);
1678         }
1679         g_free(filename);
1680         debug_print("msg %d cached, has size %d, full should be %zd.\n", uid, size, cached->size);
1681         if (cached && size >= cached->size) {
1682                 cached->total_size = cached->size;
1683                 procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1684                 procmsg_msginfo_free(&cached);
1685                 return TRUE;
1686         }
1687         if (cached)
1688                 procmsg_msginfo_free(&cached);
1689         return FALSE;
1690 }
1691
1692 void imap_cache_msg(FolderItem *item, gint msgnum)
1693 {
1694         Folder *folder = NULL;
1695
1696         if (!item)
1697                 return;
1698         folder = item->folder;
1699
1700         if (!imap_is_msg_fully_cached(folder, item, msgnum)) {
1701                 gchar *tmp = imap_fetch_msg_full(folder, item, msgnum, TRUE, TRUE);
1702                 debug_print("fetched %s\n", tmp);
1703                 g_free(tmp);
1704         }
1705 }
1706
1707 static gint imap_add_msg(Folder *folder, FolderItem *dest,
1708                          const gchar *file, MsgFlags *flags)
1709 {
1710         gint ret;
1711         GSList file_list;
1712         MsgFileInfo fileinfo;
1713
1714         g_return_val_if_fail(file != NULL, -1);
1715
1716         fileinfo.msginfo = NULL;
1717         fileinfo.file = (gchar *)file;
1718         fileinfo.flags = flags;
1719         file_list.data = &fileinfo;
1720         file_list.next = NULL;
1721
1722         ret = imap_add_msgs(folder, dest, &file_list, NULL);
1723         return ret;
1724 }
1725
1726 static gint imap_add_msgs(Folder *folder, FolderItem *dest, GSList *file_list,
1727                    GHashTable *relation)
1728 {
1729         gchar *destdir;
1730         IMAPSession *session;
1731         guint32 last_uid = 0;
1732         GSList *cur;
1733         MsgFileInfo *fileinfo;
1734         gint ok = MAILIMAP_NO_ERROR;
1735         gint curnum = 0, total = 0;
1736         gboolean missing_uids = FALSE;
1737
1738         g_return_val_if_fail(folder != NULL, -1);
1739         g_return_val_if_fail(dest != NULL, -1);
1740         g_return_val_if_fail(file_list != NULL, -1);
1741
1742         debug_print("getting session...\n");
1743         session = imap_session_get(folder);
1744         if (!session) {
1745                 return -1;
1746         }
1747         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
1748         if (is_fatal(ok)) {
1749                 g_free(destdir);
1750                 return -1;
1751         }
1752         statusbar_print_all(_("Adding messages..."));
1753         total = g_slist_length(file_list);
1754         for (cur = file_list; cur != NULL; cur = cur->next) {
1755                 IMAPFlags iflags = 0;
1756                 guint32 new_uid = 0;
1757                 gchar *real_file = NULL;
1758                 fileinfo = (MsgFileInfo *)cur->data;
1759
1760                 statusbar_progress_all(curnum, total, total < 10 ? 1:10);
1761                 curnum++;
1762
1763                 if (fileinfo->flags) {
1764                         if (MSG_IS_MARKED(*fileinfo->flags))
1765                                 iflags |= IMAP_FLAG_FLAGGED;
1766                         if (MSG_IS_REPLIED(*fileinfo->flags))
1767                                 iflags |= IMAP_FLAG_ANSWERED;
1768                         if (MSG_IS_FORWARDED(*fileinfo->flags))
1769                                 iflags |= IMAP_FLAG_FORWARDED;
1770                         if (MSG_IS_SPAM(*fileinfo->flags))
1771                                 iflags |= IMAP_FLAG_SPAM;
1772                         else
1773                                 iflags |= IMAP_FLAG_HAM;
1774                         if (!MSG_IS_UNREAD(*fileinfo->flags))
1775                                 iflags |= IMAP_FLAG_SEEN;
1776
1777                 }
1778
1779                 if (real_file == NULL)
1780                         real_file = g_strdup(fileinfo->file);
1781
1782                 if (folder_has_parent_of_type(dest, F_QUEUE) ||
1783                     folder_has_parent_of_type(dest, F_OUTBOX) ||
1784                     folder_has_parent_of_type(dest, F_DRAFT) ||
1785                     folder_has_parent_of_type(dest, F_TRASH))
1786                         iflags |= IMAP_FLAG_SEEN;
1787
1788                 ok = imap_cmd_append(session, IMAP_FOLDER_ITEM(dest), destdir, real_file, iflags,
1789                                      &new_uid);
1790
1791                 if (ok != MAILIMAP_NO_ERROR) {
1792                         g_warning("can't append message %s", real_file);
1793                         g_free(real_file);
1794                         g_free(destdir);
1795                         statusbar_progress_all(0,0,0);
1796                         statusbar_pop_all();
1797                         return -1;
1798                 } else {
1799                         debug_print("appended new message as %d\n", new_uid);
1800                         /* put the local file in the imapcache, so that we don't
1801                          * have to fetch it back later. */
1802
1803                         if (new_uid == 0) {
1804                                 missing_uids = TRUE;
1805                                 debug_print("Missing UID (0)\n");
1806                         }
1807                         if (new_uid > 0) {
1808                                 gchar *cache_path = folder_item_get_path(dest);
1809                                 if (!is_dir_exist(cache_path))
1810                                         make_dir_hier(cache_path);
1811                                 if (is_dir_exist(cache_path)) {
1812                                         gchar *cache_file = g_strconcat(
1813                                                 cache_path, G_DIR_SEPARATOR_S,
1814                                                 itos(new_uid), NULL);
1815                                         copy_file(real_file, cache_file, TRUE);
1816                                         debug_print("got UID %d, copied to cache: %s\n", new_uid, cache_file);
1817                                         g_free(cache_file);
1818                                 }
1819                                 g_free(cache_path);
1820                         }
1821                 }
1822
1823                 if (relation != NULL)
1824                         g_hash_table_insert(relation, fileinfo->msginfo != NULL ?
1825                                           (gpointer) fileinfo->msginfo : (gpointer) fileinfo,
1826                                           GINT_TO_POINTER(new_uid));
1827                 if (last_uid < new_uid) {
1828                         last_uid = new_uid;
1829                 }
1830
1831                 g_free(real_file);
1832         }
1833
1834         statusbar_progress_all(0,0,0);
1835         statusbar_pop_all();
1836
1837
1838         g_free(destdir);
1839
1840         imap_scan_required(folder, dest);
1841
1842         session = imap_session_get(folder);
1843         if (!session) {
1844                 return -1;
1845         }
1846         if (missing_uids) {
1847                 gint a;
1848                 ok = imap_select(session, IMAP_FOLDER(folder), dest,
1849                          &a, NULL, NULL, NULL, NULL, FALSE);
1850         }
1851         return last_uid;
1852 }
1853
1854 static GSList *flatten_mailimap_set(struct mailimap_set * set)
1855 {
1856         GSList *result = NULL;
1857         clistiter *list;
1858         guint32 start, end, t;
1859         GSList *cur;
1860
1861         if (!set || !set->set_list)
1862                 return NULL;
1863
1864         for (list = clist_begin(set->set_list); list; list = clist_next(list)) {
1865                 struct mailimap_set_item *item = (struct mailimap_set_item *)clist_content(list);
1866                 start = item->set_first;
1867                 end = item->set_last;
1868                 if (start <= end) {
1869                         for (t = start; t <= end; t++) {
1870                                 result = g_slist_prepend(result, GINT_TO_POINTER(t));
1871                         }
1872                 }
1873         }
1874         result = g_slist_reverse(result);
1875         if (debug_get_mode()) {
1876                 debug_print("flat imap set: ");
1877                 for (cur = result; cur; cur = cur->next) {
1878                         debug_print("%d ", GPOINTER_TO_INT(cur->data));
1879                 }
1880                 debug_print("\n");
1881         }
1882
1883         return result;
1884 }
1885 static gint imap_do_copy_msgs(Folder *folder, FolderItem *dest,
1886                               MsgInfoList *msglist, GHashTable *relation,
1887                               gboolean same_dest_ok)
1888 {
1889         FolderItem *src;
1890         gchar *destdir;
1891         GSList *seq_list, *cur;
1892         MsgInfo *msginfo;
1893         IMAPSession *session;
1894         gint ok = MAILIMAP_NO_ERROR;
1895         GHashTable *uid_hash;
1896         gint last_num = 0;
1897
1898         g_return_val_if_fail(folder != NULL, -1);
1899         g_return_val_if_fail(dest != NULL, -1);
1900         g_return_val_if_fail(msglist != NULL, -1);
1901
1902         debug_print("getting session...\n");
1903         session = imap_session_get(folder);
1904
1905         if (!session) {
1906                 return -1;
1907         }
1908
1909         msginfo = (MsgInfo *)msglist->data;
1910         src = msginfo->folder;
1911         if (!same_dest_ok && src == dest) {
1912                 g_warning("the src folder is identical to the dest.");
1913                 return -1;
1914         }
1915
1916         if (src->folder != dest->folder) {
1917                 GSList *infolist = NULL, *cur;
1918                 int res = -1;
1919                 for (cur = msglist; cur; cur = cur->next) {
1920                         msginfo = (MsgInfo *)cur->data;
1921                         MsgFileInfo *fileinfo = g_new0(MsgFileInfo, 1);
1922                         fileinfo->file = procmsg_get_message_file(msginfo);
1923                         fileinfo->flags = &(msginfo->flags);
1924                         infolist = g_slist_prepend(infolist, fileinfo);
1925                 }
1926                 infolist = g_slist_reverse(infolist);
1927                 res = folder_item_add_msgs(dest, infolist, FALSE);
1928                 for (cur = infolist; cur; cur = cur->next) {
1929                         MsgFileInfo *info = (MsgFileInfo *)cur->data;
1930                         g_free(info->file);
1931                         g_free(info);
1932                 }
1933                 g_slist_free(infolist);
1934                 return res;
1935         }
1936
1937         lock_session(session); /* unlocked later in the function */
1938
1939         ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
1940                          NULL, NULL, NULL, NULL, NULL, FALSE);
1941         if (ok != MAILIMAP_NO_ERROR) {
1942                 return ok;
1943         }
1944
1945         unlock_session(session);
1946
1947         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
1948
1949         if (is_fatal(ok)) {
1950                 g_free(destdir);
1951                 return ok;
1952         }
1953
1954         seq_list = imap_get_lep_set_from_msglist(IMAP_FOLDER(folder), msglist);
1955         uid_hash = g_hash_table_new(g_direct_hash, g_direct_equal);
1956
1957         statusbar_print_all(_("Copying messages..."));
1958         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
1959                 struct mailimap_set * seq_set;
1960                 struct mailimap_set * source = NULL;
1961                 struct mailimap_set * dest = NULL;
1962                 seq_set = cur->data;
1963
1964                 debug_print("Copying messages from %s to %s ...\n",
1965                             src->path, destdir);
1966
1967                 lock_session(session); /* unlocked later in the function */
1968                 ok = imap_cmd_copy(session, seq_set, destdir,
1969                         &source, &dest);
1970
1971                 if (is_fatal(ok)) {
1972                         session = NULL;
1973                 }
1974
1975                 if (ok == MAILIMAP_NO_ERROR) {
1976                         unlock_session(session);
1977                         if (relation && source && dest) {
1978                                 GSList *s_list = flatten_mailimap_set(source);
1979                                 GSList *d_list = flatten_mailimap_set(dest);
1980                                 GSList *s_cur, *d_cur;
1981                                 if (g_slist_length(s_list) == g_slist_length(d_list)) {
1982
1983                                         for (s_cur = s_list, d_cur = d_list;
1984                                              s_cur && d_cur;
1985                                              s_cur = s_cur->next, d_cur = d_cur->next) {
1986                                                 g_hash_table_insert(uid_hash, s_cur->data, d_cur->data);
1987                                         }
1988
1989                                 } else {
1990                                         debug_print("hhhmm, source list length != dest list length.\n");
1991                                 }
1992                                 g_slist_free(s_list);
1993                                 g_slist_free(d_list);
1994                         }
1995                 }
1996
1997
1998                 if (source)
1999                         mailimap_set_free(source);
2000                 if (dest)
2001                         mailimap_set_free(dest);
2002
2003                 if (ok != MAILIMAP_NO_ERROR) {
2004                         g_hash_table_destroy(uid_hash);
2005                         imap_lep_set_free(seq_list);
2006                         statusbar_pop_all();
2007                         return -1;
2008                 }
2009         }
2010
2011         for (cur = msglist; cur != NULL; cur = g_slist_next(cur)) {
2012                 MsgInfo *msginfo = (MsgInfo *)cur->data;
2013                 gpointer hashval;
2014
2015                 hashval = g_hash_table_lookup(uid_hash, GINT_TO_POINTER(msginfo->msgnum));
2016
2017                 if (hashval != NULL) {
2018                         gint num = GPOINTER_TO_INT(hashval);
2019                         g_hash_table_insert(relation, msginfo,
2020                                           GINT_TO_POINTER(num));
2021                         if (num > last_num)
2022                                 last_num = num;
2023                         debug_print("copied message %d as %d\n", msginfo->msgnum, num);
2024                         /* put the local file in the imapcache, so that we don't
2025                          * have to fetch it back later. */
2026                         if (num > 0) {
2027                                 gchar *cache_path = folder_item_get_path(msginfo->folder);
2028                                 gchar *real_file = g_strconcat(
2029                                         cache_path, G_DIR_SEPARATOR_S,
2030                                         itos(msginfo->msgnum), NULL);
2031                                 gchar *cache_file = NULL;
2032                                 g_free(cache_path);
2033                                 cache_path = folder_item_get_path(dest);
2034                                 cache_file = g_strconcat(
2035                                         cache_path, G_DIR_SEPARATOR_S,
2036                                         itos(num), NULL);
2037                                 if (!is_dir_exist(cache_path))
2038                                         make_dir_hier(cache_path);
2039                                 if (is_file_exist(real_file) && is_dir_exist(cache_path)) {
2040                                         if (copy_file(real_file, cache_file, TRUE) < 0)
2041                                                 debug_print("couldn't cache to %s: %s\n", cache_file,
2042                                                             strerror(errno));
2043                                         else
2044                                                 debug_print("copied to cache: %s\n", cache_file);
2045                                 }
2046                                 g_free(real_file);
2047                                 g_free(cache_file);
2048                                 g_free(cache_path);
2049                         }
2050                 } else
2051                         g_hash_table_insert(relation, msginfo,
2052                                           GINT_TO_POINTER(0));
2053         }
2054         statusbar_pop_all();
2055
2056         g_hash_table_destroy(uid_hash);
2057         imap_lep_set_free(seq_list);
2058
2059         g_free(destdir);
2060
2061         IMAP_FOLDER_ITEM(dest)->lastuid = 0;
2062         IMAP_FOLDER_ITEM(dest)->uid_next = 0;
2063         g_slist_free(IMAP_FOLDER_ITEM(dest)->uid_list);
2064         IMAP_FOLDER_ITEM(dest)->uid_list = NULL;
2065
2066         imap_scan_required(folder, dest);
2067         if (ok == MAILIMAP_NO_ERROR)
2068                 return last_num;
2069         else
2070                 return -1;
2071 }
2072
2073 static gint imap_copy_msg(Folder *folder, FolderItem *dest, MsgInfo *msginfo)
2074 {
2075         GSList msglist;
2076
2077         g_return_val_if_fail(msginfo != NULL, -1);
2078
2079         msglist.data = msginfo;
2080         msglist.next = NULL;
2081
2082         return imap_copy_msgs(folder, dest, &msglist, NULL);
2083 }
2084
2085 static gint imap_copy_msgs(Folder *folder, FolderItem *dest,
2086                     MsgInfoList *msglist, GHashTable *relation)
2087 {
2088         MsgInfo *msginfo;
2089         gint ret;
2090
2091         g_return_val_if_fail(folder != NULL, -1);
2092         g_return_val_if_fail(dest != NULL, -1);
2093         g_return_val_if_fail(msglist != NULL, -1);
2094
2095         msginfo = (MsgInfo *)msglist->data;
2096         g_return_val_if_fail(msginfo->folder != NULL, -1);
2097
2098         ret = imap_do_copy_msgs(folder, dest, msglist, relation, FALSE);
2099         return ret;
2100 }
2101
2102 static gboolean imap_matcher_type_is_local(gint matchertype)
2103 {
2104         switch (matchertype) {
2105         case MATCHCRITERIA_FROM:
2106         case MATCHCRITERIA_TO:
2107         case MATCHCRITERIA_CC:
2108         case MATCHCRITERIA_TO_OR_CC:
2109         case MATCHCRITERIA_SUBJECT:
2110         case MATCHCRITERIA_REFERENCES:
2111         case MATCHCRITERIA_MESSAGEID:
2112         case MATCHCRITERIA_INREPLYTO:
2113         case MATCHCRITERIA_AGE_GREATER:
2114         case MATCHCRITERIA_AGE_LOWER:
2115         case MATCHCRITERIA_FORWARDED:
2116         case MATCHCRITERIA_SPAM:
2117         case MATCHCRITERIA_UNREAD:
2118         case MATCHCRITERIA_NEW:
2119         case MATCHCRITERIA_MARKED:
2120         case MATCHCRITERIA_REPLIED:
2121         case MATCHCRITERIA_DELETED:
2122         case MATCHCRITERIA_SIZE_GREATER:
2123         case MATCHCRITERIA_SIZE_SMALLER:
2124         case MATCHCRITERIA_SIZE_EQUAL:
2125                 return TRUE;
2126         }
2127         return FALSE;
2128 }
2129
2130 static IMAPSearchKey* search_make_key(MatcherProp* match, gboolean* is_all)
2131 {
2132         if (match->matchtype == MATCHTYPE_MATCHCASE || match->matchtype == MATCHTYPE_MATCH) {
2133                 IMAPSearchKey* result = NULL;
2134                 gboolean invert = FALSE;
2135                 gint matchertype = match->criteria;
2136
2137                 if (is_all) {
2138                         *is_all = FALSE;
2139                 }
2140
2141                 switch (matchertype) {
2142                 case MATCHCRITERIA_NOT_NEW: invert = TRUE; matchertype = MATCHCRITERIA_NEW; break;
2143                 case MATCHCRITERIA_NOT_MARKED: invert = TRUE; matchertype = MATCHCRITERIA_MARKED; break;
2144                 case MATCHCRITERIA_NOT_FORWARDED: invert = TRUE; matchertype = MATCHCRITERIA_FORWARDED; break;
2145                 case MATCHCRITERIA_NOT_SPAM: invert = TRUE; matchertype = MATCHCRITERIA_SPAM; break;
2146                 case MATCHCRITERIA_NOT_SUBJECT: invert = TRUE; matchertype = MATCHCRITERIA_SUBJECT; break;
2147                 case MATCHCRITERIA_NOT_FROM: invert = TRUE; matchertype = MATCHCRITERIA_FROM; break;
2148                 case MATCHCRITERIA_NOT_TO: invert = TRUE; matchertype = MATCHCRITERIA_TO; break;
2149                 case MATCHCRITERIA_NOT_CC: invert = TRUE; matchertype = MATCHCRITERIA_CC; break;
2150                 case MATCHCRITERIA_NOT_REFERENCES: invert = TRUE; matchertype = MATCHCRITERIA_REFERENCES; break;
2151                 case MATCHCRITERIA_NOT_HEADER: invert = TRUE; matchertype = MATCHCRITERIA_HEADER; break;
2152                 case MATCHCRITERIA_NOT_TAG: invert = TRUE; matchertype = MATCHCRITERIA_TAG; break;
2153                 case MATCHCRITERIA_NOT_HEADERS_PART: invert = TRUE; matchertype = MATCHCRITERIA_HEADERS_PART; break;
2154                 case MATCHCRITERIA_NOT_HEADERS_CONT: invert = TRUE; matchertype = MATCHCRITERIA_HEADERS_CONT; break;
2155                 case MATCHCRITERIA_NOT_MESSAGE: invert = TRUE; matchertype = MATCHCRITERIA_MESSAGE; break;
2156                 case MATCHCRITERIA_NOT_BODY_PART: invert = TRUE; matchertype = MATCHCRITERIA_BODY_PART; break;
2157                 case MATCHCRITERIA_NOT_TO_AND_NOT_CC: invert = TRUE; matchertype = MATCHCRITERIA_TO_OR_CC; break;
2158                 case MATCHCRITERIA_NOT_MESSAGEID: invert = TRUE; matchertype = MATCHCRITERIA_MESSAGEID; break;
2159                 case MATCHCRITERIA_NOT_INREPLYTO: invert = TRUE; matchertype = MATCHCRITERIA_INREPLYTO; break;
2160                 }
2161
2162                 /*
2163                  * this aborts conversion even for predicates understood by the following code.
2164                  * while that might seem wasteful, claws local search for information listed below
2165                  * has proven faster than IMAP search plus network roundtrips. once this changes,
2166                  * consider removing these exceptions.
2167                  */
2168                 if (imap_matcher_type_is_local(matchertype))
2169                         return NULL;
2170
2171                 /* the Message-ID header is also cached */
2172                 if (matchertype == MATCHCRITERIA_HEADER && g_strcmp0("Message-ID", match->header) == 0) {
2173                         return NULL;
2174                 }
2175
2176                 switch (matchertype) {
2177                 case MATCHCRITERIA_FORWARDED:
2178                         result = imap_search_new(IMAP_SEARCH_CRITERIA_TAG, NULL, RTAG_FORWARDED, 0);
2179                         break;
2180
2181                 case MATCHCRITERIA_SPAM:
2182                         result = imap_search_new(IMAP_SEARCH_CRITERIA_TAG, NULL, RTAG_JUNK, 0);
2183                         break;
2184
2185                 case MATCHCRITERIA_MESSAGEID:
2186                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, "Message-ID", match->expr, 0);
2187                         break;
2188
2189                 case MATCHCRITERIA_INREPLYTO:
2190                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, "In-Reply-To", match->expr, 0);
2191                         break;
2192
2193                 case MATCHCRITERIA_REFERENCES:
2194                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, "References", match->expr, 0);
2195                         break;
2196
2197                 case MATCHCRITERIA_TO_OR_CC:
2198                         result = imap_search_or(
2199                                         imap_search_new(IMAP_SEARCH_CRITERIA_TO, NULL, match->expr, 0),
2200                                         imap_search_new(IMAP_SEARCH_CRITERIA_CC, NULL, match->expr, 0)
2201                                         );
2202                         break;
2203
2204                 case MATCHCRITERIA_HEADERS_PART:
2205                 case MATCHCRITERIA_HEADERS_CONT:
2206                         result = imap_search_and(
2207                                         imap_search_not(imap_search_new(IMAP_SEARCH_CRITERIA_BODY, NULL, match->expr, 0)),
2208                                         imap_search_new(IMAP_SEARCH_CRITERIA_MESSAGE, NULL, match->expr, 0)
2209                                         );
2210                         break;
2211
2212                 case MATCHCRITERIA_SIZE_EQUAL:
2213                         result = imap_search_and(
2214                                         imap_search_not(imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_SMALLER, NULL, NULL, match->value)),
2215                                         imap_search_not(imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_GREATER, NULL, NULL, match->value))
2216                                         );
2217                         break;
2218
2219                 case MATCHCRITERIA_NOT_UNREAD:
2220                         result = imap_search_new(IMAP_SEARCH_CRITERIA_READ, NULL, NULL, 0);
2221                         break;
2222
2223                 case MATCHCRITERIA_UNREAD:
2224                         result = imap_search_new(IMAP_SEARCH_CRITERIA_UNREAD, NULL, NULL, 0);
2225                         break;
2226
2227                 case MATCHCRITERIA_NEW:
2228                         result = imap_search_new(IMAP_SEARCH_CRITERIA_NEW, NULL, NULL, 0);
2229                         break;
2230
2231                 case MATCHCRITERIA_MARKED:
2232                         result = imap_search_new(IMAP_SEARCH_CRITERIA_MARKED, NULL, NULL, 0);
2233                         break;
2234
2235                 case MATCHCRITERIA_DELETED:
2236                         result = imap_search_new(IMAP_SEARCH_CRITERIA_DELETED, NULL, NULL, 0);
2237                         break;
2238
2239                 case MATCHCRITERIA_REPLIED:
2240                         result = imap_search_new(IMAP_SEARCH_CRITERIA_REPLIED, NULL, NULL, 0);
2241                         break;
2242
2243                 case MATCHCRITERIA_TAG:
2244                         {
2245                                 gchar *tmp = imap_utf8_to_modified_utf7(match->expr, TRUE);
2246                                 result = imap_search_new(IMAP_SEARCH_CRITERIA_TAG, NULL, tmp, 0);
2247                                 g_free(tmp);
2248                         }
2249                         break;
2250
2251                 case MATCHCRITERIA_SUBJECT:
2252                         result = imap_search_new(IMAP_SEARCH_CRITERIA_SUBJECT, NULL, match->expr, 0);
2253                         break;
2254
2255                 case MATCHCRITERIA_FROM:
2256                         result = imap_search_new(IMAP_SEARCH_CRITERIA_FROM, NULL, match->expr, 0);
2257                         break;
2258
2259                 case MATCHCRITERIA_TO:
2260                         result = imap_search_new(IMAP_SEARCH_CRITERIA_TO, NULL, match->expr, 0);
2261                         break;
2262
2263                 case MATCHCRITERIA_CC:
2264                         result = imap_search_new(IMAP_SEARCH_CRITERIA_CC, NULL, match->expr, 0);
2265                         break;
2266
2267                 case MATCHCRITERIA_AGE_GREATER:
2268                         result = imap_search_new(IMAP_SEARCH_CRITERIA_AGE_GREATER, NULL, NULL, match->value);
2269                         break;
2270
2271                 case MATCHCRITERIA_AGE_LOWER:
2272                         result = imap_search_new(IMAP_SEARCH_CRITERIA_AGE_LOWER, NULL, NULL, match->value);
2273                         break;
2274
2275                 case MATCHCRITERIA_BODY_PART:
2276                         result = imap_search_new(IMAP_SEARCH_CRITERIA_BODY, NULL, match->expr, 0);
2277                         break;
2278
2279                 case MATCHCRITERIA_MESSAGE:
2280                         result = imap_search_new(IMAP_SEARCH_CRITERIA_MESSAGE, NULL, match->expr, 0);
2281                         break;
2282
2283                 case MATCHCRITERIA_HEADER:
2284                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, match->header, match->expr, 0);
2285                         break;
2286
2287                 case MATCHCRITERIA_SIZE_GREATER:
2288                         result = imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_GREATER, NULL, NULL, match->value);
2289                         break;
2290
2291                 case MATCHCRITERIA_SIZE_SMALLER:
2292                         result = imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_SMALLER, NULL, NULL, match->value);
2293                         break;
2294
2295                 default:
2296                         result = imap_search_new(IMAP_SEARCH_CRITERIA_ALL, NULL, NULL, 0);
2297                         if (is_all) {
2298                                 *is_all = TRUE;
2299                         }
2300                         break;
2301                 }
2302
2303                 if (invert) {
2304                         result = imap_search_not(result);
2305                         if (is_all && *is_all) {
2306                                 *is_all = FALSE;
2307                         }
2308                 }
2309
2310                 return result;
2311         }
2312
2313         return NULL;
2314 }
2315
2316 static void imap_change_search_charset(IMAPFolder *folder)
2317 {
2318         /* If server supports charset in searches, but the last used one failed,
2319          * changed to the next preferred charset. If none are still available,
2320          * disable charset searches.
2321          * Charsets are tried in the following order:
2322          * UTF-8, locale's charset, UTF-7.
2323          */
2324
2325         if (folder->search_charset_supported) {
2326                 if (folder->search_charset && !strcmp(folder->search_charset, conv_get_locale_charset_str_no_utf8()))
2327                         folder->search_charset = "UTF-8";
2328                 else if (folder->search_charset && !strcmp(folder->search_charset, "UTF-8"))
2329                         folder->search_charset = "UTF-7";
2330                 else {
2331                         folder->search_charset = NULL;
2332                         folder->search_charset_supported = FALSE;
2333                 }
2334         }
2335 }
2336
2337 static MatcherProp *imap_matcher_prop_set_charset(IMAPFolder *folder,
2338                                                   MatcherProp *utf8_prop,
2339                                                   gchar **charset)
2340 {
2341         /* If the match is going to be done locally, or the criteria is on
2342          * tag (special-cased to modified-UTF-7), or the expression searched
2343          * is ASCII, don't bother converting.
2344          */
2345         if (imap_matcher_type_is_local(utf8_prop->criteria)
2346          || utf8_prop->criteria == MATCHCRITERIA_TAG
2347          || utf8_prop->criteria == MATCHCRITERIA_NOT_TAG
2348          || utf8_prop->expr == NULL
2349          || is_ascii_str(utf8_prop->expr))
2350                 return matcherprop_new(utf8_prop->criteria,
2351                                utf8_prop->header,
2352                                utf8_prop->matchtype,
2353                                utf8_prop->expr,
2354                                utf8_prop->value);
2355         else {
2356                 gchar *conv_expr = NULL;
2357
2358                 /* If the search is server-side and the server doesn't support
2359                  * searching with the charsets we handle, bail out.
2360                  */
2361                 if (folder->search_charset_supported == FALSE)
2362                         return NULL;
2363
2364                 /* Else, convert. */
2365                 if (*charset == NULL)
2366                         *charset = g_strdup(folder->search_charset);
2367
2368                 conv_expr = conv_codeset_strdup(utf8_prop->expr, CS_UTF_8, *charset);
2369
2370                 if (conv_expr == NULL)
2371                         conv_expr = g_strdup(utf8_prop->expr);
2372
2373                 return matcherprop_new(utf8_prop->criteria,
2374                                utf8_prop->header,
2375                                utf8_prop->matchtype,
2376                                conv_expr,
2377                                utf8_prop->value);
2378         }
2379 }
2380
2381 static gint     search_msgs             (Folder                 *folder,
2382                                          FolderItem             *container,
2383                                          MsgNumberList          **msgs,
2384                                          gboolean               *on_server,
2385                                          MatcherList            *predicate,
2386                                          SearchProgressNotify   progress_cb,
2387                                          gpointer               progress_data)
2388 {
2389         IMAPSearchKey* key = NULL;
2390         GSList* cur;
2391         int result = -1;
2392         clist* uidlist = NULL;
2393         gboolean server_filtering_useless = FALSE;
2394         IMAPSession *session;
2395         gchar *charset_to_use = NULL;
2396
2397         if (on_server == NULL || !*on_server) {
2398                 return folder_item_search_msgs_local(folder, container, msgs, on_server,
2399                                 predicate, progress_cb, progress_data);
2400         }
2401
2402         for (cur = predicate->matchers; cur != NULL; cur = cur->next) {
2403                 IMAPSearchKey* matcherPart = NULL;
2404                 MatcherProp* prop = (MatcherProp*) cur->data;
2405                 gboolean is_all;
2406                 MatcherProp *imap_prop = imap_matcher_prop_set_charset(IMAP_FOLDER(folder), prop, &charset_to_use);
2407
2408                 if (imap_prop == NULL) {
2409                         /* Couldn't convert matcherprop to IMAP - probably not ascii
2410                          * and server doesn't support the charsets we do. */
2411                          return -1;
2412                 }
2413
2414                 matcherPart = search_make_key(imap_prop, &is_all);
2415
2416                 matcherprop_free(imap_prop);
2417
2418                 if (on_server) {
2419                         *on_server &= matcherPart != NULL && prop->matchtype == MATCHTYPE_MATCHCASE;
2420                 }
2421
2422                 if (matcherPart) {
2423                         if (key == NULL) {
2424                                 key = matcherPart;
2425                                 server_filtering_useless = is_all;
2426                         } else if (predicate->bool_and) {
2427                                 key = imap_search_and(key, matcherPart);
2428                                 server_filtering_useless &= is_all;
2429                         } else {
2430                                 key = imap_search_or(key, matcherPart);
2431                                 server_filtering_useless |= is_all;
2432                         }
2433                 }
2434         }
2435
2436         if (server_filtering_useless) {
2437                 imap_search_free(key);
2438                 key = NULL;
2439         }
2440
2441         if (key == NULL && progress_cb != NULL) {
2442                 GSList* cur;
2443                 GSList* list;
2444                 int count = 0;
2445
2446                 progress_cb(progress_data, TRUE, 0, 0, container->total_msgs);
2447                 progress_cb(progress_data, TRUE, container->total_msgs, 0, container->total_msgs);
2448
2449                 list = folder_item_get_msg_list(container);
2450                 for (cur = list; cur != NULL; cur = cur->next) {
2451                         *msgs = g_slist_prepend(*msgs, GUINT_TO_POINTER(((MsgInfo*) cur->data)->msgnum));
2452                         count++;
2453                 }
2454                 procmsg_msg_list_free(list);
2455
2456                 *msgs = g_slist_reverse(*msgs);
2457
2458                 return count;
2459         }
2460
2461         session = imap_session_get(folder);
2462         if (!session) {
2463                 return -1;
2464         }
2465         result = imap_select(session, IMAP_FOLDER(folder), FOLDER_ITEM(container),
2466                          NULL, NULL, NULL, NULL, NULL, TRUE);
2467         if (result != MAILIMAP_NO_ERROR)
2468                 return -1;
2469
2470         if (progress_cb)
2471                 progress_cb(progress_data, TRUE, 0, 0, container->total_msgs);
2472         result = imap_threaded_search(folder, IMAP_SEARCH_TYPE_KEYED, key, charset_to_use, NULL, &uidlist);
2473         if (progress_cb)
2474                 progress_cb(progress_data, TRUE, container->total_msgs, 0, container->total_msgs);
2475
2476         if (result == MAILIMAP_NO_ERROR) {
2477                 gint result = 0;
2478
2479                 *msgs = imap_uid_list_from_lep(uidlist, &result);
2480
2481                 mailimap_search_result_free(uidlist);
2482
2483                 if (charset_to_use != NULL)
2484                         g_free(charset_to_use);
2485
2486                 return result;
2487         } else if (charset_to_use != NULL) {
2488                 /* If search failed and was on an 8-bit string, try the next
2489                  * available charset to search if there still are some.
2490                  */
2491                 g_free(charset_to_use);
2492
2493                 imap_change_search_charset(IMAP_FOLDER(folder));
2494                 if (IMAP_FOLDER(folder)->search_charset_supported)
2495                         return search_msgs(folder, container, msgs, on_server, predicate,
2496                                    progress_cb, progress_data);
2497                 else
2498                         return -1;
2499         } else {
2500                 return -1;
2501         }
2502 }
2503
2504
2505 static gint imap_do_remove_msgs(Folder *folder, FolderItem *dest,
2506                                 MsgInfoList *msglist, GHashTable *relation)
2507 {
2508         gchar *destdir, *dir;
2509         GSList *numlist = NULL, *cur;
2510         MsgInfo *msginfo;
2511         IMAPSession *session;
2512         gint ok = MAILIMAP_NO_ERROR;
2513
2514         g_return_val_if_fail(folder != NULL, -1);
2515         g_return_val_if_fail(dest != NULL, -1);
2516         g_return_val_if_fail(msglist != NULL, -1);
2517
2518         debug_print("getting session...\n");
2519         session = imap_session_get(folder);
2520         if (!session) {
2521                 return -1;
2522         }
2523
2524         lock_session(session); /* unlocked later in the function */
2525
2526         msginfo = (MsgInfo *)msglist->data;
2527
2528         ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
2529                          NULL, NULL, NULL, NULL, NULL, FALSE);
2530         if (ok != MAILIMAP_NO_ERROR) {
2531                 return ok;
2532         }
2533
2534         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
2535         if (is_fatal(ok)) {
2536                 g_free(destdir);
2537                 return ok;
2538         }
2539         for (cur = msglist; cur; cur = cur->next) {
2540                 msginfo = (MsgInfo *)cur->data;
2541                 if (!MSG_IS_DELETED(msginfo->flags))
2542                         numlist = g_slist_prepend(numlist, GINT_TO_POINTER(msginfo->msgnum));
2543         }
2544         numlist = g_slist_reverse(numlist);
2545
2546         if (numlist != NULL) {
2547                 ok = imap_set_message_flags
2548                         (session, IMAP_FOLDER_ITEM(msginfo->folder), numlist, IMAP_FLAG_DELETED, NULL, TRUE);
2549                 if (ok != MAILIMAP_NO_ERROR) {
2550                         log_warning(LOG_PROTOCOL, _("can't set deleted flags\n"));
2551                         g_free(destdir);
2552                         return ok;
2553                 }
2554         } /* else we just need to expunge */
2555         ok = imap_cmd_expunge(session);
2556         if (ok != MAILIMAP_NO_ERROR) {
2557                 log_warning(LOG_PROTOCOL, _("can't expunge\n"));
2558                 g_free(destdir);
2559                 return ok;
2560         }
2561
2562         session->folder_content_changed = TRUE;
2563         unlock_session(session);
2564
2565         dir = folder_item_get_path(msginfo->folder);
2566         if (is_dir_exist(dir)) {
2567                 for (cur = msglist; cur; cur = cur->next) {
2568                         msginfo = (MsgInfo *)cur->data;
2569                         remove_numbered_files(dir, msginfo->msgnum, msginfo->msgnum);
2570                 }
2571         }
2572         g_free(dir);
2573
2574         g_slist_free(numlist);
2575
2576         imap_scan_required(folder, dest);
2577
2578         g_free(destdir);
2579
2580         return 0;
2581 }
2582
2583 static gint imap_remove_msgs(Folder *folder, FolderItem *dest,
2584                     MsgInfoList *msglist, GHashTable *relation)
2585 {
2586         MsgInfo *msginfo;
2587
2588         g_return_val_if_fail(folder != NULL, -1);
2589         g_return_val_if_fail(dest != NULL, -1);
2590         if (msglist == NULL)
2591                 return 0;
2592
2593         msginfo = (MsgInfo *)msglist->data;
2594         g_return_val_if_fail(msginfo->folder != NULL, -1);
2595
2596         return imap_do_remove_msgs(folder, dest, msglist, relation);
2597 }
2598
2599 static gint imap_remove_all_msg(Folder *folder, FolderItem *item)
2600 {
2601         GSList *list = folder_item_get_msg_list(item);
2602         gint res = imap_remove_msgs(folder, item, list, NULL);
2603         procmsg_msg_list_free(list);
2604         return res;
2605 }
2606
2607 static gboolean imap_is_msg_changed(Folder *folder, FolderItem *item,
2608                                     MsgInfo *msginfo)
2609 {
2610         /* TODO: properly implement this method */
2611         return FALSE;
2612 }
2613
2614 static gint imap_close(Folder *folder, FolderItem *item)
2615 {
2616         return 0;
2617 }
2618
2619 static gint imap_scan_tree_real(Folder *folder, gboolean subs_only)
2620 {
2621         FolderItem *item = NULL;
2622         IMAPSession *session;
2623         gchar *root_folder = NULL;
2624
2625         g_return_val_if_fail(folder != NULL, -1);
2626         g_return_val_if_fail(folder->account != NULL, -1);
2627
2628         debug_print("getting session...\n");
2629         session = imap_session_get(folder);
2630         if (!session) {
2631                 if (!folder->node) {
2632                         folder_tree_destroy(folder);
2633                         item = folder_item_new(folder, folder->name, NULL);
2634                         item->folder = folder;
2635                         folder->node = item->node = g_node_new(item);
2636                 }
2637                 return -1;
2638         }
2639
2640         if (folder->account->imap_dir && *folder->account->imap_dir) {
2641                 gchar *real_path;
2642                 int r = MAILIMAP_NO_ERROR;
2643                 clist * lep_list;
2644
2645                 Xstrdup_a(root_folder, folder->account->imap_dir, {return -1;});
2646                 extract_quote(root_folder, '"');
2647                 subst_char(root_folder,
2648                            imap_get_path_separator(session, IMAP_FOLDER(folder),
2649                                                    root_folder, &r),
2650                            '/');
2651                 if (is_fatal(r))
2652                         return -1;
2653                 strtailchomp(root_folder, '/');
2654                 real_path = imap_get_real_path
2655                         (session, IMAP_FOLDER(folder), root_folder, &r);
2656                 if (is_fatal(r)) {
2657                         g_free(real_path);
2658                         return -1;
2659                 }
2660                 debug_print("IMAP root directory: %s\n", real_path);
2661
2662                 /* check if root directory exist */
2663
2664                 r = imap_threaded_list(session->folder, "", real_path,
2665                                        &lep_list);
2666
2667                 if (r != MAILIMAP_NO_ERROR)
2668                         imap_handle_error(SESSION(session), NULL, r);
2669
2670                 if ((r != MAILIMAP_NO_ERROR) || (clist_count(lep_list) == 0)) {
2671                         if (!folder->node) {
2672                                 item = folder_item_new(folder, folder->name, NULL);
2673                                 item->folder = folder;
2674                                 folder->node = item->node = g_node_new(item);
2675                         }
2676                         return -1;
2677                 }
2678                 mailimap_list_result_free(lep_list);
2679
2680                 g_free(real_path);
2681         }
2682
2683         if (folder->node)
2684                 item = FOLDER_ITEM(folder->node->data);
2685
2686         if (item && !item->path && root_folder) {
2687                 item->path = g_strdup(root_folder);
2688         }
2689
2690         if (!item || ((item->path || root_folder) &&
2691                       strcmp2(item->path, root_folder) != 0)) {
2692                 folder_tree_destroy(folder);
2693                 item = folder_item_new(folder, folder->name, root_folder);
2694                 item->folder = folder;
2695                 folder->node = item->node = g_node_new(item);
2696         }
2697
2698         imap_scan_tree_recursive(session, FOLDER_ITEM(folder->node->data), subs_only);
2699         imap_create_missing_folders(folder);
2700
2701         return 0;
2702 }
2703
2704 static gint imap_scan_tree(Folder *folder)
2705 {
2706         gboolean subs_only = FALSE;
2707         if (folder->account) {
2708                 debug_print(" scanning only subs %d\n", folder->account->imap_subsonly);
2709                 subs_only = folder->account->imap_subsonly;
2710         }
2711         return imap_scan_tree_real(folder, subs_only);
2712 }
2713
2714 static gint imap_scan_tree_recursive(IMAPSession *session, FolderItem *item, gboolean subs_only)
2715 {
2716         Folder *folder;
2717         IMAPFolder *imapfolder;
2718         FolderItem *new_item;
2719         GSList *item_list, *cur;
2720         GNode *node;
2721         gchar *real_path;
2722         gchar *wildcard_path;
2723         gchar separator;
2724         gchar wildcard[3];
2725         clist * lep_list;
2726         int r = MAILIMAP_NO_ERROR;
2727
2728         g_return_val_if_fail(item != NULL, -1);
2729         g_return_val_if_fail(item->folder != NULL, -1);
2730         g_return_val_if_fail(item->no_sub == FALSE, -1);
2731
2732         folder = item->folder;
2733         imapfolder = IMAP_FOLDER(folder);
2734
2735         separator = imap_get_path_separator(session, imapfolder, item->path, &r);
2736         if (is_fatal(r))
2737                 return r;
2738
2739         if (folder->ui_func)
2740                 folder->ui_func(folder, item, folder->ui_func_data);
2741
2742         if (item->path) {
2743                 wildcard[0] = separator;
2744                 wildcard[1] = '%';
2745                 wildcard[2] = '\0';
2746                 real_path = imap_get_real_path(session, imapfolder, item->path, &r);
2747                 if (is_fatal(r)) {
2748                         g_free(real_path);
2749                         return r;
2750                 }
2751         } else {
2752                 wildcard[0] = '%';
2753                 wildcard[1] = '\0';
2754                 real_path = g_strdup("");
2755         }
2756
2757         Xstrcat_a(wildcard_path, real_path, wildcard,
2758                   {g_free(real_path); return MAILIMAP_ERROR_BAD_STATE;});
2759         lep_list = NULL;
2760
2761         if (subs_only)
2762                 r = imap_threaded_lsub(folder, "", wildcard_path, &lep_list);
2763         else
2764                 r = imap_threaded_list(folder, "", wildcard_path, &lep_list);
2765
2766         if (r != MAILIMAP_NO_ERROR) {
2767                 imap_handle_error(SESSION(session), NULL, r);
2768                 item_list = NULL;
2769                 g_free(real_path);
2770                 return r;
2771         }
2772         else {
2773                 item_list = imap_list_from_lep(imapfolder,
2774                                                lep_list, real_path, FALSE);
2775                 mailimap_list_result_free(lep_list);
2776         }
2777
2778         g_free(real_path);
2779
2780         node = item->node->children;
2781         while (node != NULL) {
2782                 FolderItem *old_item = FOLDER_ITEM(node->data);
2783                 GNode *next = node->next;
2784
2785                 new_item = NULL;
2786                 for (cur = item_list; cur != NULL; cur = cur->next) {
2787                         FolderItem *cur_item = FOLDER_ITEM(cur->data);
2788                         if (!strcmp2(old_item->path, cur_item->path)) {
2789                                 new_item = cur_item;
2790                                 break;
2791                         }
2792                 }
2793                 if (!new_item) {
2794                         if (old_item && old_item->path && !strcasecmp(old_item->path, "INBOX")) {
2795                                 debug_print("not removing INBOX\n");
2796                         } else {
2797                                 debug_print("folder '%s' not found. removing...\n",
2798                                             old_item->path);
2799                                 folder_item_remove(old_item);
2800                         }
2801                 } else {
2802                         old_item->no_sub = new_item->no_sub;
2803                         old_item->no_select = new_item->no_select;
2804                         if (old_item->no_sub == TRUE && node->children) {
2805                                 debug_print("folder '%s' doesn't have "
2806                                             "subfolders. removing...\n",
2807                                             old_item->path);
2808                                 folder_item_remove_children(old_item);
2809                         }
2810                 }
2811
2812                 node = next;
2813         }
2814
2815         for (cur = item_list; cur != NULL; cur = cur->next) {
2816                 FolderItem *cur_item = FOLDER_ITEM(cur->data);
2817                 new_item = NULL;
2818
2819                 for (node = item->node->children; node != NULL;
2820                      node = node->next) {
2821                         if (!strcmp2(FOLDER_ITEM(node->data)->path,
2822                                      cur_item->path)) {
2823                                 new_item = FOLDER_ITEM(node->data);
2824                                 folder_item_destroy(cur_item);
2825                                 cur_item = NULL;
2826                                 break;
2827                         }
2828                 }
2829                 if (!new_item) {
2830                         new_item = cur_item;
2831                         debug_print("new folder '%s' found.\n", new_item->path);
2832                         folder_item_append(item, new_item);
2833                 }
2834
2835                 if (!strcasecmp(new_item->path, "INBOX")) {
2836                         new_item->stype = F_INBOX;
2837                         folder->inbox = new_item;
2838                 } else if (!folder_item_parent(item) || item->stype == F_INBOX) {
2839                         gchar *base;
2840
2841                         base = g_path_get_basename(new_item->path);
2842
2843                         if (!folder->outbox && !g_ascii_strcasecmp(base, "Sent")) {
2844                                 new_item->stype = F_OUTBOX;
2845                                 folder->outbox = new_item;
2846                         } else if (!folder->draft && (!g_ascii_strcasecmp(base, "Drafts") || !g_ascii_strcasecmp(base, "Draft"))) {
2847                                 new_item->stype = F_DRAFT;
2848                                 folder->draft = new_item;
2849                         } else if (!folder->queue && !g_ascii_strcasecmp(base, "Queue")) {
2850                                 new_item->stype = F_QUEUE;
2851                                 folder->queue = new_item;
2852                         } else if (!folder->trash && !g_ascii_strcasecmp(base, "Trash")) {
2853                                 new_item->stype = F_TRASH;
2854                                 folder->trash = new_item;
2855                         }
2856                         g_free(base);
2857                 }
2858
2859                 if (new_item->no_sub == FALSE)
2860                         imap_scan_tree_recursive(session, new_item, subs_only);
2861         }
2862
2863         g_slist_free(item_list);
2864
2865         return MAILIMAP_NO_ERROR;
2866 }
2867
2868 GList *imap_scan_subtree(Folder *folder, FolderItem *item, gboolean unsubs_only, gboolean recursive)
2869 {
2870         IMAPSession *session = imap_session_get(folder);
2871         gchar *real_path;
2872         gchar *wildcard_path;
2873         gchar separator;
2874         gchar wildcard[3];
2875         clist * lep_list;
2876         GSList *item_list = NULL, *cur;
2877         GList *child_list = NULL, *tmplist = NULL;
2878         GSList *sub_list = NULL;
2879         int r = MAILIMAP_NO_ERROR;
2880
2881         if (!session)
2882                 return NULL;
2883
2884         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &r);
2885         if (is_fatal(r))
2886                 return NULL;
2887
2888         if (item->path) {
2889                 wildcard[0] = separator;
2890                 wildcard[1] = '%';
2891                 wildcard[2] = '\0';
2892                 real_path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &r);
2893                 if (is_fatal(r)) {
2894                         g_free(real_path);
2895                         return NULL;
2896                 }
2897         } else {
2898                 wildcard[0] = '%';
2899                 wildcard[1] = '\0';
2900                 real_path = g_strdup("");
2901         }
2902
2903         Xstrcat_a(wildcard_path, real_path, wildcard,
2904                   {g_free(real_path); return NULL;});
2905         lep_list = NULL;
2906
2907         if (unsubs_only)
2908                 statusbar_print_all(_("Looking for unsubscribed folders in %s..."),
2909                                 item->path?item->path:item->name);
2910         else
2911                 statusbar_print_all(_("Looking for subfolders of %s..."),
2912                                 item->path?item->path:item->name);
2913
2914         r = imap_threaded_list(folder, "", wildcard_path, &lep_list);
2915         if (r) {
2916                 g_free(real_path);
2917                 statusbar_pop_all();
2918                 return NULL;
2919         }
2920         item_list = imap_list_from_lep(IMAP_FOLDER(folder),
2921                                lep_list, real_path, FALSE);
2922         mailimap_list_result_free(lep_list);
2923
2924         for (cur = item_list; cur != NULL; cur = cur->next) {
2925                 FolderItem *cur_item = FOLDER_ITEM(cur->data);
2926                 if (recursive) {
2927                         tmplist = imap_scan_subtree(folder, cur_item,
2928                                         unsubs_only, recursive);
2929                         if (tmplist)
2930                                 child_list = g_list_concat(child_list, tmplist);
2931                 }
2932                 child_list = g_list_prepend(child_list,
2933                                 imap_get_real_path(session,
2934                                         IMAP_FOLDER(folder), cur_item->path, &r));
2935                 if (is_fatal(r)) {
2936                         g_free(real_path);
2937                         statusbar_pop_all();
2938                         return NULL;
2939                 }
2940                 folder_item_destroy(cur_item);
2941         }
2942         child_list = g_list_reverse(child_list);
2943         g_slist_free(item_list);
2944
2945         if (unsubs_only) {
2946                 r = imap_threaded_lsub(folder, "", wildcard_path, &lep_list);
2947                 if (r) {
2948                         g_free(real_path);
2949                         statusbar_pop_all();
2950                         return NULL;
2951                 }
2952                 sub_list = imap_list_from_lep(IMAP_FOLDER(folder),
2953                                        lep_list, real_path, FALSE);
2954                 mailimap_list_result_free(lep_list);
2955
2956                 for (cur = sub_list; cur != NULL; cur = cur->next) {
2957                         FolderItem *cur_item = FOLDER_ITEM(cur->data);
2958                         GList *oldlitem = NULL;
2959                         gchar *tmp = imap_get_real_path(session,
2960                                         IMAP_FOLDER(folder), cur_item->path, &r);
2961                         if (r) {
2962                                 g_free(real_path);
2963                                 statusbar_pop_all();
2964                                 g_free(tmp);
2965                                 return NULL;
2966                         }
2967                         folder_item_destroy(cur_item);
2968                         oldlitem = g_list_find_custom(
2969                                         child_list, tmp, (GCompareFunc)strcmp2);
2970                         if (oldlitem) {
2971                                 child_list = g_list_remove_link(child_list, oldlitem);
2972                                 g_free(oldlitem->data);
2973                                 g_list_free(oldlitem);
2974                         }
2975                         g_free(tmp);
2976                 }
2977         }
2978
2979         g_free(real_path);
2980         statusbar_pop_all();
2981
2982         return child_list;
2983 }
2984
2985 static gint imap_create_tree(Folder *folder)
2986 {
2987         g_return_val_if_fail(folder != NULL, -1);
2988         g_return_val_if_fail(folder->node != NULL, -1);
2989         g_return_val_if_fail(folder->node->data != NULL, -1);
2990         g_return_val_if_fail(folder->account != NULL, -1);
2991
2992         imap_scan_tree(folder);
2993         imap_create_missing_folders(folder);
2994
2995         return 0;
2996 }
2997
2998 static void imap_create_missing_folders(Folder *folder)
2999 {
3000         g_return_if_fail(folder != NULL);
3001
3002         if (!folder->inbox)
3003                 folder->inbox = imap_create_special_folder
3004                         (folder, F_INBOX, "INBOX");
3005         if (!folder->trash)
3006                 folder->trash = imap_create_special_folder
3007                         (folder, F_TRASH, "Trash");
3008         if (!folder->queue)
3009                 folder->queue = imap_create_special_folder
3010                         (folder, F_QUEUE, "Queue");
3011         if (!folder->outbox)
3012                 folder->outbox = imap_create_special_folder
3013                         (folder, F_OUTBOX, "Sent");
3014         if (!folder->draft)
3015                 folder->draft = imap_create_special_folder
3016                         (folder, F_DRAFT, "Drafts");
3017 }
3018
3019 static FolderItem *imap_create_special_folder(Folder *folder,
3020                                               SpecialFolderItemType stype,
3021                                               const gchar *name)
3022 {
3023         FolderItem *item;
3024         FolderItem *new_item;
3025
3026         g_return_val_if_fail(folder != NULL, NULL);
3027         g_return_val_if_fail(folder->node != NULL, NULL);
3028         g_return_val_if_fail(folder->node->data != NULL, NULL);
3029         g_return_val_if_fail(folder->account != NULL, NULL);
3030         g_return_val_if_fail(name != NULL, NULL);
3031
3032         item = FOLDER_ITEM(folder->node->data);
3033         new_item = imap_create_folder(folder, item, name);
3034
3035         if (!new_item) {
3036                 g_warning("Can't create '%s'", name);
3037                 if (!folder->inbox) return NULL;
3038
3039                 new_item = imap_create_folder(folder, folder->inbox, name);
3040                 if (!new_item)
3041                         g_warning("Can't create '%s' under INBOX", name);
3042                 else
3043                         new_item->stype = stype;
3044         } else
3045                 new_item->stype = stype;
3046
3047         return new_item;
3048 }
3049
3050 static gchar *imap_folder_get_path(Folder *folder)
3051 {
3052         gchar *folder_path;
3053
3054         g_return_val_if_fail(folder != NULL, NULL);
3055         g_return_val_if_fail(folder->account != NULL, NULL);
3056
3057 #ifdef G_OS_WIN32
3058         gchar *sanitized_dirname = g_strdup(folder->account->recv_server);
3059         g_strdelimit(sanitized_dirname, ":", ',');
3060 #endif
3061
3062         folder_path = g_strconcat(get_imap_cache_dir(),
3063                                   G_DIR_SEPARATOR_S,
3064 #ifdef G_OS_WIN32
3065                                                                                                                                         sanitized_dirname,
3066 #else
3067                                   folder->account->recv_server,
3068 #endif
3069                                   G_DIR_SEPARATOR_S,
3070                                   folder->account->userid,
3071                                   NULL);
3072
3073 #ifdef G_OS_WIN32
3074         g_free(sanitized_dirname);
3075 #endif
3076         return folder_path;
3077 }
3078
3079 #ifdef G_OS_WIN32
3080 static gchar *imap_encode_unsafe_chars(const gchar *str)
3081 {
3082         gchar *ret = NULL, *o_ret;
3083         gchar *i;
3084         if (!str)
3085                 return NULL;
3086         ret = g_malloc(3*strlen(str)+1);
3087         o_ret = ret;
3088         for (i = (gchar *)str; *i; i++) {
3089                 switch(*i) {
3090                         case ':':
3091                         case '|':
3092                         case '<':
3093                         case '>':
3094                         case '*':
3095                         case '?':
3096                         case '#':
3097                                 *ret++ = '%';
3098                                 *ret++ = '0'+(*i/10);
3099                                 *ret++ = '0'+(*i%10);
3100                                 break;
3101                         default:
3102                                 *ret++ = *i;
3103                 }
3104         }
3105         *ret++ = '\0';
3106         return o_ret;
3107 }
3108 #endif
3109 static gchar *imap_item_get_path(Folder *folder, FolderItem *item)
3110 {
3111         gchar *folder_path, *path;
3112         gchar *item_path = NULL;
3113
3114         g_return_val_if_fail(folder != NULL, NULL);
3115         g_return_val_if_fail(item != NULL, NULL);
3116         folder_path = imap_folder_get_path(folder);
3117
3118         g_return_val_if_fail(folder_path != NULL, NULL);
3119
3120 #ifdef G_OS_UNIX
3121         item_path = g_strdup(item->path);
3122 #else
3123         item_path = imap_encode_unsafe_chars(item->path);
3124 #endif
3125
3126         if (g_path_is_absolute(folder_path)) {
3127                 if (item_path)
3128                         path = g_strconcat(folder_path, G_DIR_SEPARATOR_S,
3129                                            item_path, NULL);
3130                 else
3131                         path = g_strdup(folder_path);
3132         } else {
3133                 if (item_path)
3134                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
3135                                            folder_path, G_DIR_SEPARATOR_S,
3136                                            item_path, NULL);
3137                 else
3138                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
3139                                            folder_path, NULL);
3140         }
3141         g_free(folder_path);
3142         g_free(item_path);
3143 #ifdef G_OS_WIN32
3144         while (strchr(path, '/'))
3145                 *strchr(path, '/') = '\\';
3146 #endif
3147
3148         return path;
3149 }
3150
3151 static FolderItem *imap_create_folder(Folder *folder, FolderItem *parent,
3152                                const gchar *name)
3153 {
3154         gchar *dirpath, *imap_path;
3155         IMAPSession *session;
3156         FolderItem *new_item;
3157         gchar separator;
3158         gchar *new_name;
3159         const gchar *p;
3160         gint ok = MAILIMAP_NO_ERROR;
3161         gboolean no_select = FALSE, no_sub = FALSE;
3162         gboolean exist = FALSE;
3163
3164         g_return_val_if_fail(folder != NULL, NULL);
3165         g_return_val_if_fail(folder->account != NULL, NULL);
3166         g_return_val_if_fail(parent != NULL, NULL);
3167         g_return_val_if_fail(name != NULL, NULL);
3168
3169         if (to_number(name) > 0) {
3170                 gchar *cached_msg = imap_get_cached_filename(parent, to_number(name));
3171                 if (is_file_exist(cached_msg)) {
3172                         if (claws_unlink(cached_msg) != 0) {
3173                                 return NULL;
3174                         }
3175                 }
3176         }
3177
3178         debug_print("getting session...\n");
3179         session = imap_session_get(folder);
3180         if (!session) {
3181                 return NULL;
3182         }
3183
3184         if (!folder_item_parent(parent) && strcasecmp(name, "INBOX") == 0) {
3185                 dirpath = g_strdup(name);
3186         }else if (parent->path)
3187                 dirpath = g_strconcat(parent->path, "/", name, NULL);
3188         else if ((p = strchr(name, '/')) != NULL && *(p + 1) != '\0')
3189                 dirpath = g_strdup(name);
3190         else if (folder->account->imap_dir && *folder->account->imap_dir) {
3191                 gchar *imap_dir;
3192
3193                 Xstrdup_a(imap_dir, folder->account->imap_dir, {return NULL;});
3194                 strtailchomp(imap_dir, '/');
3195                 dirpath = g_strconcat(imap_dir, "/", name, NULL);
3196         } else
3197                 dirpath = g_strdup(name);
3198
3199
3200
3201         /* keep trailing directory separator to create a folder that contains
3202            sub folder */
3203         imap_path = imap_utf8_to_modified_utf7(dirpath, FALSE);
3204
3205         strtailchomp(dirpath, '/');
3206         Xstrdup_a(new_name, name, {
3207                 g_free(dirpath);
3208                 g_free(imap_path);
3209                 return NULL;});
3210
3211         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), imap_path, &ok);
3212         if (is_fatal(ok)) {
3213                 g_free(imap_path);
3214                 return NULL;
3215         }
3216         imap_path_separator_subst(imap_path, separator);
3217         /* remove trailing / for display */
3218         strtailchomp(new_name, '/');
3219
3220         if (strcasecmp(dirpath, "INBOX") != 0) {
3221                 GPtrArray *argbuf;
3222                 int r;
3223                 clist * lep_list;
3224
3225                 argbuf = g_ptr_array_new();
3226                 r = imap_threaded_list(folder, "", imap_path, &lep_list);
3227                 if (r != MAILIMAP_NO_ERROR) {
3228                         imap_handle_error(SESSION(session), NULL, r);
3229                         log_warning(LOG_PROTOCOL, _("can't create mailbox: LIST failed\n"));
3230                         g_free(imap_path);
3231                         g_free(dirpath);
3232                         ptr_array_free_strings(argbuf);
3233                         g_ptr_array_free(argbuf, TRUE);
3234                         return NULL;
3235                 }
3236
3237                 if (clist_count(lep_list) > 0)
3238                         exist = TRUE;
3239                 mailimap_list_result_free(lep_list);
3240                 lep_list = NULL;
3241                 if (!exist) {
3242                         ok = imap_cmd_create(session, imap_path);
3243                         if (ok != MAILIMAP_NO_ERROR) {
3244                                 log_warning(LOG_PROTOCOL, _("can't create mailbox\n"));
3245                                 g_free(imap_path);
3246                                 g_free(dirpath);
3247                                 return NULL;
3248                         }
3249                         r = imap_threaded_list(folder, "", imap_path, &lep_list);
3250                         if (r == MAILIMAP_NO_ERROR) {
3251                                 GSList *item_list = imap_list_from_lep(IMAP_FOLDER(folder),
3252                                                lep_list, dirpath, TRUE);
3253                                 if (item_list) {
3254                                         FolderItem *cur_item = FOLDER_ITEM(item_list->data);
3255                                         no_select = cur_item->no_select;
3256                                         no_sub = cur_item->no_sub;
3257                                         g_slist_free(item_list);
3258                                 }
3259                                 mailimap_list_result_free(lep_list);
3260                         } else {
3261                                 imap_handle_error(SESSION(session), NULL, r);
3262                         }
3263                 }
3264                 imap_threaded_subscribe(folder, imap_path, TRUE);
3265         } else {
3266                 clist *lep_list;
3267                 int r;
3268                 /* just get flags */
3269                 r = imap_threaded_list(folder, "", "INBOX", &lep_list);
3270                 if (r == MAILIMAP_NO_ERROR) {
3271                         GSList *item_list = imap_list_from_lep(IMAP_FOLDER(folder),
3272                                        lep_list, dirpath, TRUE);
3273                         if (item_list) {
3274                                 FolderItem *cur_item = FOLDER_ITEM(item_list->data);
3275                                 no_select = cur_item->no_select;
3276                                 no_sub = cur_item->no_sub;
3277                                 g_slist_free(item_list);
3278                         }
3279                         mailimap_list_result_free(lep_list);
3280                 } else {
3281                         imap_handle_error(SESSION(session), NULL, r);
3282                 }
3283         }
3284
3285         new_item = folder_item_new(folder, new_name, dirpath);
3286         new_item->no_select = no_select;
3287         new_item->no_sub = no_sub;
3288         folder_item_append(parent, new_item);
3289         g_free(imap_path);
3290         g_free(dirpath);
3291
3292         dirpath = folder_item_get_path(new_item);
3293         if (!is_dir_exist(dirpath))
3294                 make_dir_hier(dirpath);
3295         g_free(dirpath);
3296
3297         if (exist) {
3298                 /* folder existed, scan it */
3299                 imap_scan_required(folder, new_item);
3300                 folder_item_scan_full(new_item, FALSE);
3301         }
3302
3303         return new_item;
3304 }
3305
3306 static gint imap_rename_folder(Folder *folder, FolderItem *item,
3307                                const gchar *name)
3308 {
3309         gchar *dirpath;
3310         gchar *newpath;
3311         gchar *real_oldpath;
3312         gchar *real_newpath;
3313         gchar *paths[2];
3314         gchar *old_cache_dir;
3315         gchar *new_cache_dir;
3316         IMAPSession *session;
3317         gchar separator;
3318         gint ok = MAILIMAP_NO_ERROR;
3319         gint exists, recent, unseen;
3320         guint32 uid_validity;
3321
3322         g_return_val_if_fail(folder != NULL, -1);
3323         g_return_val_if_fail(item != NULL, -1);
3324         g_return_val_if_fail(item->path != NULL, -1);
3325         g_return_val_if_fail(name != NULL, -1);
3326
3327         debug_print("getting session...\n");
3328         session = imap_session_get(folder);
3329         if (!session) {
3330                 return -1;
3331         }
3332
3333         if (strchr(name, imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &ok)) != NULL ||
3334                 is_fatal(ok)) {
3335                 g_warning("New folder name must not contain the namespace "
3336                             "path separator");
3337                 return -1;
3338         }
3339
3340         real_oldpath = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &ok);
3341         if (is_fatal(ok)) {
3342                 g_free(real_oldpath);
3343                 return -1;
3344         }
3345
3346         g_free(session->mbox);
3347         session->mbox = NULL;
3348         session->exists = 0;
3349         session->recent = 0;
3350         session->expunge = 0;
3351         ok = imap_cmd_examine(session, "INBOX",
3352                               &exists, &recent, &unseen, &uid_validity, FALSE);
3353         if (ok != MAILIMAP_NO_ERROR) {
3354                 g_free(real_oldpath);
3355                 return -1;
3356         }
3357
3358         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &ok);
3359         if (is_fatal(ok)) {
3360                 g_free(real_oldpath);
3361                 return -1;
3362         }
3363         if (strchr(item->path, '/')) {
3364                 dirpath = g_path_get_dirname(item->path);
3365                 newpath = g_strconcat(dirpath, "/", name, NULL);
3366                 g_free(dirpath);
3367         } else
3368                 newpath = g_strdup(name);
3369
3370         real_newpath = imap_utf8_to_modified_utf7(newpath, FALSE);
3371         imap_path_separator_subst(real_newpath, separator);
3372
3373         ok = imap_cmd_rename(session, real_oldpath, real_newpath);
3374         if (ok != MAILIMAP_NO_ERROR) {
3375                 log_warning(LOG_PROTOCOL, _("can't rename mailbox: %s to %s\n"),
3376                             real_oldpath, real_newpath);
3377                 g_free(real_oldpath);
3378                 g_free(newpath);
3379                 g_free(real_newpath);
3380                 return -1;
3381         }
3382         g_free(item->name);
3383         item->name = g_strdup(name);
3384
3385         old_cache_dir = folder_item_get_path(item);
3386
3387         paths[0] = g_strdup(item->path);
3388         paths[1] = newpath;
3389         g_node_traverse(item->node, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
3390                         imap_rename_folder_func, paths);
3391
3392         if (is_dir_exist(old_cache_dir)) {
3393                 new_cache_dir = folder_item_get_path(item);
3394                 if (g_rename(old_cache_dir, new_cache_dir) < 0) {
3395                         FILE_OP_ERROR(old_cache_dir, "rename");
3396                 }
3397                 g_free(new_cache_dir);
3398         }
3399
3400         g_free(old_cache_dir);
3401         g_free(paths[0]);
3402         g_free(newpath);
3403         g_free(real_oldpath);
3404         g_free(real_newpath);
3405         return 0;
3406 }
3407
3408 gint imap_subscribe(Folder *folder, FolderItem *item, gchar *rpath, gboolean sub)
3409 {
3410         gchar *path;
3411         gint r = MAILIMAP_NO_ERROR;
3412         IMAPSession *session;
3413         debug_print("getting session...\n");
3414
3415         session = imap_session_get(folder);
3416         if (!session) {
3417                 return -1;
3418         }
3419         if (item && item->path) {
3420                 path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &r);
3421                 if (!path)
3422                         return -1;
3423                 if (is_fatal(r)) {
3424                         g_free(path);
3425                         return -1;
3426                 }
3427                 if (!strcasecmp(path, "INBOX") && sub == FALSE) {
3428                         g_free(path);
3429                         return -1;
3430                 }
3431                 debug_print("%ssubscribing %s\n", sub?"":"un", path);
3432                 r = imap_threaded_subscribe(folder, path, sub);
3433                 g_free(path);
3434         } else if (rpath) {
3435                 r = imap_threaded_subscribe(folder, rpath, sub);
3436         } else
3437                 return -1;
3438         return r;
3439 }
3440
3441 static gint imap_remove_folder_real(Folder *folder, FolderItem *item)
3442 {
3443         gint ok = MAILIMAP_NO_ERROR;
3444         IMAPSession *session;
3445         gchar *path;
3446         gchar *cache_dir;
3447         gboolean selected_folder;
3448
3449         g_return_val_if_fail(folder != NULL, -1);
3450         g_return_val_if_fail(item != NULL, -1);
3451         g_return_val_if_fail(item->path != NULL, -1);
3452
3453         debug_print("getting session...\n");
3454         session = imap_session_get(folder);
3455         if (!session) {
3456                 return -1;
3457         }
3458         path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &ok);
3459         if (is_fatal(ok)) {
3460                 g_free(path);
3461                 return -1;
3462         }
3463         imap_threaded_subscribe(folder, path, FALSE);
3464
3465         selected_folder = (session->mbox != NULL) &&
3466                           (!strcmp(session->mbox, item->path));
3467         if (selected_folder) {
3468                 ok = imap_cmd_close(session);
3469                 if (ok != MAILIMAP_NO_ERROR) {
3470                         debug_print("close err %d\n", ok);
3471                         return ok;
3472                 }
3473         }
3474         ok = imap_cmd_delete(session, path);
3475         if (ok != MAILIMAP_NO_ERROR && !is_fatal(ok)) {
3476                 gchar *tmp = NULL;
3477
3478                 ok = MAILIMAP_NO_ERROR;
3479                 tmp = g_strdup_printf("%s%c", path,
3480                                 imap_get_path_separator(session, IMAP_FOLDER(folder), path, &ok));
3481                 g_free(path);
3482                 path = tmp;
3483                 if (!is_fatal(ok))
3484                         ok = imap_cmd_delete(session, path);
3485         }
3486
3487         if (ok != MAILIMAP_NO_ERROR) {
3488                 log_warning(LOG_PROTOCOL, _("can't delete mailbox\n"));
3489                 g_free(path);
3490                 return -1;
3491         }
3492
3493         g_free(path);
3494         cache_dir = folder_item_get_path(item);
3495         if (is_dir_exist(cache_dir) && remove_dir_recursive(cache_dir) < 0)
3496                 g_warning("can't remove directory '%s'", cache_dir);
3497         g_free(cache_dir);
3498         folder_item_remove(item);
3499         return 0;
3500 }
3501
3502 static gint imap_remove_folder(Folder *folder, FolderItem *item)
3503 {
3504         GNode *node, *next;
3505
3506         g_return_val_if_fail(item != NULL, -1);
3507         g_return_val_if_fail(item->folder != NULL, -1);
3508         g_return_val_if_fail(item->node != NULL, -1);
3509
3510         node = item->node->children;
3511         while (node != NULL) {
3512                 next = node->next;
3513                 if (imap_remove_folder(folder, FOLDER_ITEM(node->data)) < 0)
3514                         return -1;
3515                 node = next;
3516         }
3517         debug_print("IMAP removing %s\n", item->path);
3518
3519         if (imap_remove_all_msg(folder, item) < 0)
3520                 return -1;
3521         return imap_remove_folder_real(folder, item);
3522 }
3523
3524 typedef struct _uncached_data {
3525         IMAPSession *session;
3526         FolderItem *item;
3527         MsgNumberList *numlist;
3528         guint cur;
3529         guint total;
3530         gboolean done;
3531         int ok;
3532 } uncached_data;
3533
3534 static void *imap_get_uncached_messages_thread(void *data)
3535 {
3536         uncached_data *stuff = (uncached_data *)data;
3537         IMAPSession *session = stuff->session;
3538         FolderItem *item = stuff->item;
3539         MsgNumberList *numlist = stuff->numlist;
3540         GSList *newlist = NULL;
3541         GSList *llast = NULL;
3542         GSList *seq_list, *cur;
3543         gboolean got_alien_tags = FALSE;
3544
3545         debug_print("uncached_messages\n");
3546
3547         if (session == NULL || item == NULL || item->folder == NULL
3548             || FOLDER_CLASS(item->folder) != &imap_class) {
3549                 stuff->done = TRUE;
3550                 return NULL;
3551         }
3552
3553         seq_list = imap_get_lep_set_from_numlist(IMAP_FOLDER(item->folder), numlist);
3554         debug_print("get msgs info\n");
3555         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
3556                 struct mailimap_set * imapset;
3557                 unsigned int i;
3558                 int r;
3559                 carray * env_list;
3560                 int count;
3561
3562                 if (session->cancelled)
3563                         break;
3564
3565                 imapset = cur->data;
3566
3567                 r = imap_threaded_fetch_env(session->folder,
3568                                             imapset, &env_list);
3569                 if (r != MAILIMAP_NO_ERROR) {
3570                         imap_handle_error(SESSION(session), NULL, r);
3571                         if (is_fatal(r)) {
3572                                 stuff->ok = r;
3573                                 return NULL;
3574                         }
3575                         continue;
3576                 }
3577
3578                 session_set_access_time(SESSION(session));
3579
3580                 count = 0;
3581                 for(i = 0 ; i < carray_count(env_list) ; i += 2) {
3582                         struct imap_fetch_env_info * info;
3583                         MsgInfo * msginfo;
3584                         GSList *tags = NULL, *cur = NULL;
3585                         info = carray_get(env_list, i);
3586                         tags = carray_get(env_list, i+1);
3587                         msginfo = imap_envelope_from_lep(info, item);
3588                         if (msginfo == NULL) {
3589                                 slist_free_strings_full(tags);
3590                                 continue;
3591                         }
3592                         g_slist_free(msginfo->tags);
3593                         msginfo->tags = NULL;
3594
3595                         for (cur = tags; cur; cur = cur->next) {
3596                                 gchar *real_tag = imap_modified_utf7_to_utf8(cur->data, TRUE);
3597                                 gint id = 0;
3598                                 id = tags_get_id_for_str(real_tag);
3599                                 if (id == -1) {
3600                                         id = tags_add_tag(real_tag);
3601                                         got_alien_tags = TRUE;
3602                                 }
3603                                 if (!g_slist_find(msginfo->tags, GINT_TO_POINTER(id))) {
3604                                         msginfo->tags = g_slist_prepend(
3605                                                         msginfo->tags,
3606                                                         GINT_TO_POINTER(id));
3607                                 }
3608                                 g_free(real_tag);
3609                         }
3610                         if (msginfo->tags)
3611                                 msginfo->tags = g_slist_reverse(msginfo->tags);
3612                         slist_free_strings_full(tags);
3613                         msginfo->folder = item;
3614                         if (!newlist)
3615                                 llast = newlist = g_slist_append(newlist, msginfo);
3616                         else {
3617                                 llast = g_slist_append(llast, msginfo);
3618                                 llast = llast->next;
3619                         }
3620                         count ++;
3621                 }
3622
3623                 imap_fetch_env_free(env_list);
3624         }
3625
3626         if (got_alien_tags) {
3627                 tags_write_tags();
3628                 main_window_reflect_tags_changes(mainwindow_get_mainwindow());
3629         }
3630
3631         imap_lep_set_free(seq_list);
3632
3633         session_set_access_time(SESSION(session));
3634         stuff->done = TRUE;
3635         return newlist;
3636 }
3637
3638 #define MAX_MSG_NUM 50
3639
3640 static GSList *imap_get_uncached_messages(IMAPSession *session,
3641                                         FolderItem *item,
3642                                         MsgNumberList *numlist,
3643                                         int *r)
3644 {
3645         GSList *result = NULL;
3646         GSList * cur;
3647         uncached_data *data = g_new0(uncached_data, 1);
3648
3649         cur = numlist;
3650         data->total = g_slist_length(numlist);
3651         data->ok = MAILIMAP_NO_ERROR;
3652         debug_print("messages list : %i\n", data->total);
3653
3654         while (cur != NULL) {
3655                 GSList * partial_result;
3656                 int count;
3657                 GSList * newlist;
3658                 GSList * llast;
3659
3660                 llast = NULL;
3661                 count = 0;
3662                 newlist = NULL;
3663                 while (count < MAX_MSG_NUM) {
3664                         void * p;
3665
3666                         p = cur->data;
3667
3668                         if (newlist == NULL)
3669                                 llast = newlist = g_slist_append(newlist, p);
3670                         else {
3671                                 llast = g_slist_append(llast, p);
3672                                 llast = llast->next;
3673                         }
3674                         count ++;
3675
3676                         cur = cur->next;
3677                         if (cur == NULL)
3678                                 break;
3679                 }
3680
3681                 data->done = FALSE;
3682                 data->session = session;
3683                 data->item = item;
3684                 data->numlist = newlist;
3685                 data->cur += count;
3686
3687                 if (prefs_common.work_offline &&
3688                     !inc_offline_should_override(FALSE,
3689                         _("Claws Mail needs network access in order "
3690                           "to access the IMAP server."))) {
3691                         g_free(data);
3692                         return NULL;
3693                 }
3694
3695                 partial_result =
3696                         (GSList *)imap_get_uncached_messages_thread(data);
3697                 *r = data->ok;
3698                 if (data->ok != MAILIMAP_NO_ERROR) {
3699                         goto bail;
3700                 }
3701                 statusbar_progress_all(data->cur,data->total, 1);
3702
3703                 g_slist_free(newlist);
3704
3705                 result = g_slist_concat(result, partial_result);
3706         }
3707 bail:
3708         g_free(data);
3709
3710         statusbar_progress_all(0,0,0);
3711         statusbar_pop_all();
3712
3713         return result;
3714 }
3715
3716 static void imap_delete_all_cached_messages(FolderItem *item)
3717 {
3718         gchar *dir;
3719
3720         g_return_if_fail(item != NULL);
3721         g_return_if_fail(item->folder != NULL);
3722         g_return_if_fail(FOLDER_CLASS(item->folder) == &imap_class);
3723
3724         debug_print("Deleting all cached messages...\n");
3725
3726         dir = folder_item_get_path(item);
3727         if (is_dir_exist(dir))
3728                 remove_all_numbered_files(dir);
3729         g_free(dir);
3730
3731         debug_print("Deleting all cached messages done.\n");
3732 }
3733
3734 gchar imap_get_path_separator_for_item(FolderItem *item)
3735 {
3736         Folder *folder = NULL;
3737         IMAPFolder *imap_folder = NULL;
3738         IMAPSession *session = NULL;
3739         gchar result = '/';
3740         gint ok = MAILIMAP_NO_ERROR;
3741         if (!item)
3742                 return '/';
3743         folder = item->folder;
3744
3745         if (!folder)
3746                 return '/';
3747
3748         imap_folder = IMAP_FOLDER(folder);
3749
3750         debug_print("getting session...\n");
3751         session = imap_session_get(FOLDER(folder));
3752         result = imap_get_path_separator(session, imap_folder, item->path, &ok);
3753         return result;
3754 }
3755
3756 static gchar imap_refresh_path_separator(IMAPSession *session, IMAPFolder *folder, const gchar *subfolder, gint *ok)
3757 {
3758         clist * lep_list;
3759         int r;
3760         gchar separator = '\0';
3761
3762         g_return_val_if_fail(session != NULL, '/');
3763         r = imap_threaded_list((Folder *)folder, "", subfolder, &lep_list);
3764
3765         if (r != MAILIMAP_NO_ERROR) {
3766                 imap_handle_error(SESSION(session), NULL, r);
3767                 log_warning(LOG_PROTOCOL, _("LIST failed\n"));
3768                 *ok = r;
3769                 return '\0';
3770         }
3771
3772         if (lep_list != NULL && clist_count(lep_list) > 0) {
3773                 clistiter * iter = clist_begin(lep_list);
3774                 struct mailimap_mailbox_list * mb;
3775                 mb = clist_content(iter);
3776
3777                 separator = mb->mb_delimiter;
3778                 debug_print("got separator: %c\n", folder->last_seen_separator);
3779         }
3780         *ok = MAILIMAP_NO_ERROR;
3781         mailimap_list_result_free(lep_list);
3782         return separator;
3783 }
3784
3785 static gchar imap_get_path_separator(IMAPSession *session, IMAPFolder *folder, const gchar *path, gint *ok)
3786 {
3787         gchar separator = '/';
3788         *ok = MAILIMAP_NO_ERROR;
3789         if (folder->last_seen_separator == 0) {
3790                 folder->last_seen_separator = imap_refresh_path_separator(session, folder, "", ok);
3791         }
3792
3793         if (folder->last_seen_separator == 0) {
3794                 folder->last_seen_separator = imap_refresh_path_separator(session, folder, "INBOX", ok);
3795         }
3796
3797         if (folder->last_seen_separator != 0) {
3798                 debug_print("using separator: %c\n", folder->last_seen_separator);
3799                 return folder->last_seen_separator;
3800         }
3801
3802         return separator;
3803 }
3804
3805 static gchar *imap_get_real_path(IMAPSession *session, IMAPFolder *folder, const gchar *path, gint *ok)
3806 {
3807         gchar *real_path = NULL;
3808         gchar separator;
3809
3810         g_return_val_if_fail(folder != NULL, NULL);
3811         g_return_val_if_fail(path != NULL, NULL);
3812
3813         *ok = MAILIMAP_NO_ERROR;
3814
3815         real_path = imap_utf8_to_modified_utf7(path, FALSE);
3816         separator = imap_get_path_separator(session, folder, path, ok);
3817         if (*ok == MAILIMAP_NO_ERROR)
3818                 imap_path_separator_subst(real_path, separator);
3819
3820         return real_path;
3821 }
3822
3823 static gint imap_set_message_flags(IMAPSession *session,
3824                                    IMAPFolderItem *item,
3825                                    MsgNumberList *numlist,
3826                                    IMAPFlags flags,
3827                                    GSList *tags,
3828                                    gboolean is_set)
3829 {
3830         gint ok = 0;
3831         GSList *seq_list;
3832         GSList * cur;
3833         gint total = 0;
3834         IMAPFolder *folder = NULL;
3835         GSList *sorted_list = NULL;
3836
3837         if (numlist == NULL || session == NULL)
3838                 return MAILIMAP_ERROR_BAD_STATE;
3839
3840         folder = IMAP_FOLDER(session->folder);
3841
3842         sorted_list = g_slist_copy(numlist);
3843         sorted_list = g_slist_sort(sorted_list, g_int_compare);
3844
3845         cur = g_slist_last(sorted_list);
3846
3847         if (cur)
3848                 total = GPOINTER_TO_INT(cur->data);
3849
3850         seq_list = imap_get_lep_set_from_numlist(IMAP_FOLDER(session->folder), sorted_list);
3851
3852         statusbar_print_all(_("Flagging messages..."));
3853
3854         for(cur = seq_list ; cur != NULL ; cur = g_slist_next(cur)) {
3855                 struct mailimap_set * imapset = (struct mailimap_set *)cur->data;
3856                 struct mailimap_set_item *set_item = NULL;
3857
3858                 if (imapset->set_list)
3859                         set_item = clist_content(clist_begin(imapset->set_list));
3860                 else
3861                         continue;
3862
3863                 if (set_item == NULL)
3864                         continue;
3865
3866                 statusbar_progress_all(set_item->set_first, total, 1);
3867
3868                 ok = imap_cmd_store(session, item, imapset,
3869                                     flags, tags, is_set);
3870                 statusbar_progress_all(set_item->set_last, total, 1);
3871                 if (ok != MAILIMAP_NO_ERROR && folder->max_set_size > 20) {
3872                         /* reduce max set size */
3873                         folder->max_set_size /= 2;
3874                 }
3875                 if (ok != MAILIMAP_NO_ERROR && is_fatal(ok)) {
3876                         break;
3877                 }
3878         }
3879
3880         g_slist_free(sorted_list);
3881
3882         statusbar_progress_all(0,0,0);
3883         statusbar_pop_all();
3884
3885         imap_lep_set_free(seq_list);
3886
3887         return ok;
3888 }
3889
3890 typedef struct _select_data {
3891         IMAPSession *session;
3892         gchar *real_path;
3893         gint *exists;
3894         gint *recent;
3895         gint *unseen;
3896         guint32 *uid_validity;
3897         gboolean done;
3898 } select_data;
3899
3900 static gint imap_select(IMAPSession *session, IMAPFolder *folder,
3901                         FolderItem *item,
3902                         gint *exists, gint *recent, gint *unseen,
3903                         guint32 *uid_validity, gint *can_create_flags,
3904                         gboolean block)
3905 {
3906         gchar *real_path;
3907         gint ok = MAILIMAP_NO_ERROR;
3908         gint exists_, recent_, unseen_;
3909         guint32 uid_validity_;
3910         gint can_create_flags_;
3911         const gchar *path = item ? item->path:NULL;
3912
3913         if (!item) {
3914                 return MAILIMAP_ERROR_BAD_STATE;
3915         }
3916
3917         if (!exists && !recent && !unseen && !uid_validity && !can_create_flags) {
3918                 if (session->mbox && strcmp(session->mbox, path) == 0)
3919                         return MAILIMAP_NO_ERROR;
3920         }
3921         if (!exists && !recent && !unseen && !uid_validity && can_create_flags) {
3922                 if (session->mbox && strcmp(session->mbox, path) == 0) {
3923                         if (IMAP_FOLDER_ITEM(item)->can_create_flags != ITEM_CAN_CREATE_FLAGS_UNKNOWN)
3924                                 return MAILIMAP_NO_ERROR;
3925                 }
3926         }
3927         if (!exists)
3928                 exists = &exists_;
3929         if (!recent)
3930                 recent = &recent_;
3931         if (!unseen)
3932                 unseen = &unseen_;
3933         if (!uid_validity)
3934                 uid_validity = &uid_validity_;
3935         if (!can_create_flags)
3936                 can_create_flags = &can_create_flags_;
3937
3938         g_free(session->mbox);
3939         session->mbox = NULL;
3940         session->exists = 0;
3941         session->recent = 0;
3942         session->expunge = 0;
3943
3944         real_path = imap_get_real_path(session, folder, path, &ok);
3945         if (is_fatal(ok)) {
3946                 g_free(real_path);
3947                 return ok;
3948         }
3949         g_slist_free(IMAP_FOLDER_ITEM(item)->ok_flags);
3950         IMAP_FOLDER_ITEM(item)->ok_flags = NULL;
3951         ok = imap_cmd_select(session, real_path,
3952                              exists, recent, unseen, uid_validity, can_create_flags,
3953                              &(IMAP_FOLDER_ITEM(item)->ok_flags), block);
3954         if (ok != MAILIMAP_NO_ERROR) {
3955                 log_warning(LOG_PROTOCOL, _("can't select folder: %s\n"), real_path);
3956         } else {
3957                 session->mbox = g_strdup(path);
3958                 session->folder_content_changed = FALSE;
3959                 session->exists = *exists;
3960                 session->recent = *recent;
3961                 session->expunge = 0;
3962                 session->unseen = *unseen;
3963                 session->uid_validity = *uid_validity;
3964                 debug_print("select: exists %d recent %d expunge %d uid_validity %d can_create_flags %d\n",
3965                         session->exists, session->recent, session->expunge,
3966                         session->uid_validity, *can_create_flags);
3967         }
3968         if (*can_create_flags) {
3969                 IMAP_FOLDER_ITEM(item)->can_create_flags = ITEM_CAN_CREATE_FLAGS;
3970         } else {
3971                 IMAP_FOLDER_ITEM(item)->can_create_flags = ITEM_CANNOT_CREATE_FLAGS;
3972         }
3973         g_free(real_path);
3974
3975         return ok;
3976 }
3977
3978 static gint imap_status(IMAPSession *session, IMAPFolder *folder,
3979                         const gchar *path, IMAPFolderItem *item,
3980                         gint *messages,
3981                         guint32 *uid_next, guint32 *uid_validity,
3982                         gint *unseen, gboolean block)
3983 {
3984         int r = MAILIMAP_NO_ERROR;
3985         clistiter * iter;
3986         struct mailimap_mailbox_data_status * data_status;
3987         int got_values;
3988         gchar *real_path;
3989         guint mask = 0;
3990
3991         real_path = imap_get_real_path(session, folder, path, &r);
3992         if (is_fatal(r)) {
3993                 g_free(real_path);
3994                 return r;
3995         }
3996         if (messages) {
3997                 mask |= 1 << 0;
3998                 *messages = 0;
3999         }
4000         if (uid_next) {
4001                 mask |= 1 << 2;
4002                 *uid_next = 0;
4003         }
4004         if (uid_validity) {
4005                 mask |= 1 << 3;
4006                 *uid_validity = 0;
4007         }
4008         if (unseen) {
4009                 mask |= 1 << 4;
4010                 *unseen = 0;
4011         }
4012
4013         if (session->mbox != NULL &&
4014             !strcmp(session->mbox, item->item.path)) {
4015                 r = imap_cmd_close(session);
4016                 if (r != MAILIMAP_NO_ERROR) {
4017                         debug_print("close err %d\n", r);
4018                         g_free(real_path);
4019                         return r;
4020                 }
4021         }
4022
4023         r = imap_threaded_status(FOLDER(folder), real_path,
4024                 &data_status, mask);
4025
4026         g_free(real_path);
4027         if (r != MAILIMAP_NO_ERROR) {
4028                 imap_handle_error(SESSION(session), NULL, r);
4029                 debug_print("status err %d\n", r);
4030                 return r;
4031         }
4032
4033         if (data_status == NULL || data_status->st_info_list == NULL) {
4034                 debug_print("data_status %p\n", data_status);
4035                 if (data_status) {
4036                         debug_print("data_status->st_info_list %p\n", data_status->st_info_list);
4037                         mailimap_mailbox_data_status_free(data_status);
4038                 }
4039                 return MAILIMAP_ERROR_BAD_STATE;
4040         }
4041
4042         got_values = 0;
4043         if (data_status->st_info_list) {
4044                 for(iter = clist_begin(data_status->st_info_list) ; iter != NULL ;
4045                     iter = clist_next(iter)) {
4046                         struct mailimap_status_info * info;
4047
4048                         info = clist_content(iter);
4049                         switch (info->st_att) {
4050                         case MAILIMAP_STATUS_ATT_MESSAGES:
4051                                 if (messages) {
4052                                         * messages = info->st_value;
4053                                         got_values |= 1 << 0;
4054                                 }
4055                                 break;
4056
4057                         case MAILIMAP_STATUS_ATT_UIDNEXT:
4058                                 if (uid_next) {
4059                                         * uid_next = info->st_value;
4060                                         got_values |= 1 << 2;
4061                                 }
4062                                 break;
4063
4064                         case MAILIMAP_STATUS_ATT_UIDVALIDITY:
4065                                 if (uid_validity) {
4066                                         * uid_validity = info->st_value;
4067                                         got_values |= 1 << 3;
4068                                 }
4069                                 break;
4070
4071                         case MAILIMAP_STATUS_ATT_UNSEEN:
4072                                 if (unseen) {
4073                                         * unseen = info->st_value;
4074                                         got_values |= 1 << 4;
4075                                 }
4076                                 break;
4077                         }
4078                 }
4079         }
4080         mailimap_mailbox_data_status_free(data_status);
4081
4082         if (got_values != mask) {
4083                 g_warning("status: incomplete values received (%d)", got_values);
4084         }
4085         return MAILIMAP_NO_ERROR;
4086 }
4087
4088 static void imap_free_capabilities(IMAPSession *session)
4089 {
4090         slist_free_strings_full(session->capability);
4091         session->capability = NULL;
4092 }
4093
4094 /* low-level IMAP4rev1 commands */
4095
4096 static gint imap_cmd_login(IMAPSession *session,
4097                            const gchar *user, const gchar *pass,
4098                            const gchar *type)
4099 {
4100         int r;
4101         gint ok;
4102
4103         if (!strcmp(type, "plaintext") && imap_has_capability(session, "LOGINDISABLED")) {
4104                 gint ok = MAILIMAP_ERROR_BAD_STATE;
4105                 if (imap_has_capability(session, "STARTTLS")) {
4106 #ifdef USE_GNUTLS
4107                         log_warning(LOG_PROTOCOL, _("Server requires TLS to log in.\n"));
4108                         ok = imap_cmd_starttls(session);
4109                         if (ok != MAILIMAP_NO_ERROR) {
4110                                 log_warning(LOG_PROTOCOL, _("Can't start TLS session.\n"));
4111                                 return ok;
4112                         } else {
4113                                 /* refresh capas */
4114                                 imap_free_capabilities(session);
4115                                 if ((r = imap_get_capabilities(session)) != MAILIMAP_NO_ERROR) {
4116                                         imap_handle_error(SESSION(session), NULL, r);
4117                                         log_warning(LOG_PROTOCOL, _("Can't refresh capabilities.\n"));
4118                                         return r;
4119                                 }
4120                         }
4121 #else
4122                         log_error(LOG_PROTOCOL, _("Connection to %s failed: "
4123                                         "server requires TLS, but Claws Mail "
4124                                         "has been compiled without TLS "
4125                                         "support.\n"),
4126                                         SESSION(session)->server);
4127                         return MAILIMAP_ERROR_LOGIN;
4128 #endif
4129                 } else {
4130                         log_error(LOG_PROTOCOL, _("Server logins are disabled.\n"));
4131                         return MAILIMAP_ERROR_LOGIN;
4132                 }
4133         }
4134
4135         log_print(LOG_PROTOCOL, "IMAP4> Logging %s to %s using %s\n",
4136                         user,
4137                         SESSION(session)->server,
4138                         type);
4139         r = imap_threaded_login(session->folder, user, pass, type);
4140         if (r != MAILIMAP_NO_ERROR) {
4141                 imap_handle_error(SESSION(session), NULL, r);
4142                 log_print(LOG_PROTOCOL, "IMAP4< Error logging in to %s\n",
4143                                 SESSION(session)->server);
4144                 ok = r;
4145         } else {
4146                 log_print(LOG_PROTOCOL, "IMAP4< Login to %s successful\n",
4147                                 SESSION(session)->server);
4148                 ok = MAILIMAP_NO_ERROR;
4149         }
4150         return ok;
4151 }
4152
4153 static gint imap_cmd_noop(IMAPSession *session)
4154 {
4155         int r;
4156         unsigned int exists, recent, expunge, unseen, uidnext, uidval;
4157
4158         r = imap_threaded_noop(session->folder, &exists, &recent, &expunge, &unseen, &uidnext, &uidval);
4159         if (r != MAILIMAP_NO_ERROR) {
4160                 imap_handle_error(SESSION(session), NULL, r);
4161                 debug_print("noop err %d\n", r);
4162                 return r;
4163         }
4164
4165         if ((exists && exists != session->exists)
4166          || (recent && recent != session->recent)
4167          || (expunge && expunge != session->expunge)
4168          || (unseen && unseen != session->unseen)) {
4169                 session->folder_content_changed = TRUE;
4170         }
4171         if (uidnext != 0 && uidnext != session->uid_next) {
4172                 session->uid_next = uidnext;
4173                 session->folder_content_changed = TRUE;
4174         }
4175         if (uidval != 0 && uidval != session->uid_validity) {
4176                 session->uid_validity = uidval;
4177                 session->folder_content_changed = TRUE;
4178         }
4179
4180         session->exists = exists;
4181         session->recent = recent;
4182         session->expunge = expunge;
4183         session->unseen = unseen;
4184
4185         session_set_access_time(SESSION(session));
4186
4187         return MAILIMAP_NO_ERROR;
4188 }
4189
4190 #ifdef USE_GNUTLS
4191 static gint imap_cmd_starttls(IMAPSession *session)
4192 {
4193         int r;
4194
4195         r = imap_threaded_starttls(session->folder,
4196                 SESSION(session)->server, SESSION(session)->port);
4197         if (r != MAILIMAP_NO_ERROR) {
4198                 imap_handle_error(SESSION(session), NULL, r);
4199                 debug_print("starttls err %d\n", r);
4200                 return r;
4201         }
4202         return MAILIMAP_NO_ERROR;
4203 }
4204 #endif
4205
4206 static gint imap_cmd_select(IMAPSession *session, const gchar *folder,
4207                             gint *exists, gint *recent, gint *unseen,
4208                             guint32 *uid_validity, gint *can_create_flags,
4209                             GSList **ok_flags, gboolean block)
4210 {
4211         int r;
4212
4213         r = imap_threaded_select(session->folder, folder,
4214                                  exists, recent, unseen, uid_validity, can_create_flags, ok_flags);
4215         if (r != MAILIMAP_NO_ERROR) {
4216                 imap_handle_error(SESSION(session), NULL, r);
4217                 debug_print("select err %d\n", r);
4218                 return r;
4219         }
4220         return MAILIMAP_NO_ERROR;
4221 }
4222
4223 static gint imap_cmd_close(IMAPSession *session)
4224 {
4225         int r;
4226
4227         r = imap_threaded_close(session->folder);
4228         if (r != MAILIMAP_NO_ERROR) {
4229                 imap_handle_error(SESSION(session), NULL, r);
4230                 debug_print("close err %d\n", r);
4231                 return r;
4232         }
4233         g_free(session->mbox);
4234         session->mbox = NULL;
4235         session->exists = 0;
4236         session->recent = 0;
4237         session->expunge = 0;
4238         return MAILIMAP_NO_ERROR;
4239 }
4240
4241 static gint imap_cmd_examine(IMAPSession *session, const gchar *folder,
4242                              gint *exists, gint *recent, gint *unseen,
4243                              guint32 *uid_validity, gboolean block)
4244 {
4245         int r;
4246
4247         r = imap_threaded_examine(session->folder, folder,
4248                                   exists, recent, unseen, uid_validity);
4249         if (r != MAILIMAP_NO_ERROR) {
4250                 imap_handle_error(SESSION(session), NULL, r);
4251                 debug_print("examine err %d\n", r);
4252
4253                 return r;
4254         }
4255         return MAILIMAP_NO_ERROR;
4256 }
4257
4258 static gint imap_cmd_create(IMAPSession *session, const gchar *folder)
4259 {
4260         int r;
4261
4262         r = imap_threaded_create(session->folder, folder);
4263         if (r != MAILIMAP_NO_ERROR) {
4264                 imap_handle_error(SESSION(session), NULL, r);
4265                 return r;
4266         }
4267
4268         return MAILIMAP_NO_ERROR;
4269 }
4270
4271 static gint imap_cmd_rename(IMAPSession *session, const gchar *old_folder,
4272                             const gchar *new_folder)
4273 {
4274         int r;
4275
4276         r = imap_threaded_rename(session->folder, old_folder,
4277                                  new_folder);
4278         if (r != MAILIMAP_NO_ERROR) {
4279                 imap_handle_error(SESSION(session), NULL, r);
4280                 return r;
4281         }
4282
4283         return MAILIMAP_NO_ERROR;
4284 }
4285
4286 static gint imap_cmd_delete(IMAPSession *session, const gchar *folder)
4287 {
4288         int r;
4289
4290
4291         r = imap_threaded_delete(session->folder, folder);
4292         if (r != MAILIMAP_NO_ERROR) {
4293                 imap_handle_error(SESSION(session), NULL, r);
4294                 return r;
4295         }
4296
4297         return MAILIMAP_NO_ERROR;
4298 }
4299
4300 typedef struct _fetch_data {
4301         IMAPSession *session;
4302         guint32 uid;
4303         const gchar *filename;
4304         gboolean headers;
4305         gboolean body;
4306         gboolean done;
4307 } fetch_data;
4308
4309 static void *imap_cmd_fetch_thread(void *data)
4310 {
4311         fetch_data *stuff = (fetch_data *)data;
4312         IMAPSession *session = stuff->session;
4313         guint32 uid = stuff->uid;
4314         const gchar *filename = stuff->filename;
4315         int r;
4316
4317         if (stuff->body) {
4318                 r = imap_threaded_fetch_content(session->folder,
4319                                                uid, 1, filename);
4320         }
4321         else {
4322                 r = imap_threaded_fetch_content(session->folder,
4323                                                 uid, 0, filename);
4324         }
4325         if (r != MAILIMAP_NO_ERROR) {
4326                 imap_handle_error(SESSION(session), NULL, r);
4327                 debug_print("fetch err %d\n", r);
4328                 return GINT_TO_POINTER(r);
4329         }
4330         return GINT_TO_POINTER(MAILIMAP_NO_ERROR);
4331 }
4332
4333 static gint imap_cmd_fetch(IMAPSession *session, guint32 uid,
4334                                 const gchar *filename, gboolean headers,
4335                                 gboolean body)
4336 {
4337         fetch_data *data = g_new0(fetch_data, 1);
4338         int result = 0;
4339         data->done = FALSE;
4340         data->session = session;
4341         data->uid = uid;
4342         data->filename = filename;
4343         data->headers = headers;
4344         data->body = body;
4345
4346         if (prefs_common.work_offline &&
4347             !inc_offline_should_override(FALSE,
4348                 _("Claws Mail needs network access in order "
4349                   "to access the IMAP server."))) {
4350                 g_free(data);
4351                 return -1;
4352         }
4353         statusbar_print_all(_("Fetching message..."));
4354         result = GPOINTER_TO_INT(imap_cmd_fetch_thread(data));
4355         statusbar_pop_all();
4356         g_free(data);
4357         return result;
4358 }
4359
4360
4361 static gint imap_cmd_append(IMAPSession *session,
4362                             IMAPFolderItem *item,
4363                             const gchar *destfolder,
4364                             const gchar *file, IMAPFlags flags,
4365                             guint32 *new_uid)
4366 {
4367         struct mailimap_flag_list * flag_list;
4368         int r;
4369
4370         cm_return_val_if_fail(file != NULL, MAILIMAP_ERROR_BAD_STATE);
4371
4372         flag_list = imap_flag_to_lep(item, flags, NULL);
4373         lock_session(session);
4374         r = imap_threaded_append(session->folder, destfolder,
4375                          file, flag_list, (int *)new_uid);
4376         mailimap_flag_list_free(flag_list);
4377
4378         if (r != MAILIMAP_NO_ERROR) {
4379                 imap_handle_error(SESSION(session), NULL, r);
4380                 debug_print("append err %d\n", r);
4381                 return r;
4382         }
4383
4384         unlock_session(session);
4385
4386         return MAILIMAP_NO_ERROR;
4387 }
4388
4389 static gint imap_cmd_copy(IMAPSession *session, struct mailimap_set * set,
4390                           const gchar *destfolder,
4391                           struct mailimap_set **source, struct mailimap_set **dest)
4392 {
4393         int r;
4394
4395         g_return_val_if_fail(session != NULL, MAILIMAP_ERROR_BAD_STATE);
4396         g_return_val_if_fail(set != NULL, MAILIMAP_ERROR_BAD_STATE);
4397         g_return_val_if_fail(destfolder != NULL, MAILIMAP_ERROR_BAD_STATE);
4398
4399         r = imap_threaded_copy(session->folder, set, destfolder, source, dest);
4400         if (r != MAILIMAP_NO_ERROR) {
4401                 imap_handle_error(SESSION(session), NULL, r);
4402                 return r;
4403         }
4404
4405         return MAILIMAP_NO_ERROR;
4406 }
4407
4408 static gint imap_cmd_store(IMAPSession *session,
4409                            IMAPFolderItem *item,
4410                            struct mailimap_set * set,
4411                            IMAPFlags flags, GSList *tags, int do_add)
4412 {
4413         int r;
4414         struct mailimap_flag_list * flag_list = NULL;
4415         struct mailimap_store_att_flags * store_att_flags;
4416
4417         flag_list = imap_flag_to_lep(item, flags, tags);
4418
4419         if (do_add)
4420                 store_att_flags =
4421                         mailimap_store_att_flags_new_add_flags_silent(flag_list);
4422         else
4423                 store_att_flags =
4424                         mailimap_store_att_flags_new_remove_flags_silent(flag_list);
4425
4426         r = imap_threaded_store(session->folder, set, store_att_flags);
4427         mailimap_store_att_flags_free(store_att_flags);
4428         if (r != MAILIMAP_NO_ERROR) {
4429                 imap_handle_error(SESSION(session), NULL, r);
4430                 return r;
4431         }
4432
4433         return MAILIMAP_NO_ERROR;
4434 }
4435
4436 static gint imap_cmd_expunge(IMAPSession *session)
4437 {
4438         int r;
4439
4440         if (prefs_common.work_offline &&
4441             !inc_offline_should_override(FALSE,
4442                 _("Claws Mail needs network access in order "
4443                   "to access the IMAP server."))) {
4444                 return -1;
4445         }
4446
4447         r = imap_threaded_expunge(session->folder);
4448         if (r != MAILIMAP_NO_ERROR) {
4449                 imap_handle_error(SESSION(session), NULL, r);
4450                 return r;
4451         }
4452
4453         return MAILIMAP_NO_ERROR;
4454 }
4455
4456 gint imap_expunge(Folder *folder, FolderItem *item)
4457 {
4458         IMAPSession *session = imap_session_get(folder);
4459         if (session == NULL)
4460                 return -1;
4461
4462         return imap_cmd_expunge(session);
4463 }
4464
4465 static void imap_path_separator_subst(gchar *str, gchar separator)
4466 {
4467         gchar *p;
4468         gboolean in_escape = FALSE;
4469
4470         if (!separator || separator == '/') return;
4471
4472         for (p = str; *p != '\0'; p++) {
4473                 if (*p == '/' && !in_escape)
4474                         *p = separator;
4475                 else if (*p == '&' && *(p + 1) != '-' && !in_escape)
4476                         in_escape = TRUE;
4477                 else if (*p == '-' && in_escape)
4478                         in_escape = FALSE;
4479         }
4480 }
4481
4482 static gboolean imap_rename_folder_func(GNode *node, gpointer data)
4483 {
4484         FolderItem *item = node->data;
4485         gchar **paths = data;
4486         const gchar *oldpath = paths[0];
4487         const gchar *newpath = paths[1];
4488         gchar *real_oldpath, *real_newpath;
4489         gchar *base;
4490         gchar *new_itempath;
4491         gint oldpathlen;
4492         IMAPSession *session = imap_session_get(item->folder);
4493         gint ok = MAILIMAP_NO_ERROR;
4494         oldpathlen = strlen(oldpath);
4495         if (strncmp(oldpath, item->path, oldpathlen) != 0) {
4496                 g_warning("path doesn't match: %s, %s", oldpath, item->path);
4497                 return TRUE;
4498         }
4499
4500         base = item->path + oldpathlen;
4501         while (*base == '/') base++;
4502         if (*base == '\0')
4503                 new_itempath = g_strdup(newpath);
4504         else
4505                 new_itempath = g_strconcat(newpath, "/", base,
4506                                            NULL);
4507
4508         real_oldpath = imap_get_real_path(session, IMAP_FOLDER(item->folder), item->path, &ok);
4509         g_free(item->path);
4510         item->path = new_itempath;
4511
4512         real_newpath = imap_get_real_path(session, IMAP_FOLDER(item->folder), item->path, &ok);
4513
4514         imap_threaded_subscribe(item->folder, real_oldpath, FALSE);
4515         imap_threaded_subscribe(item->folder, real_newpath, TRUE);
4516
4517         g_free(real_oldpath);
4518         g_free(real_newpath);
4519         return FALSE;
4520 }
4521
4522 static gint get_list_of_uids(IMAPSession *session, Folder *folder, IMAPFolderItem *item, GSList **msgnum_list)
4523 {
4524         GSList *uidlist, *elem;
4525         int r = -1;
4526         clist * lep_uidlist;
4527         gint ok, nummsgs = 0;
4528
4529         if (session == NULL) {
4530                 return -1;
4531         }
4532
4533         ok = imap_select(session, IMAP_FOLDER(folder), FOLDER_ITEM(item),
4534                          NULL, NULL, NULL, NULL, NULL, TRUE);
4535         if (ok != MAILIMAP_NO_ERROR) {
4536                 return -1;
4537         }
4538
4539         g_slist_free(item->uid_list);
4540         item->uid_list = NULL;
4541
4542         uidlist = NULL;
4543
4544         if (folder->account && folder->account->low_bandwidth) {
4545                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SIMPLE,
4546                                 NULL, NULL, NULL, &lep_uidlist);
4547         }
4548
4549         if (r == MAILIMAP_NO_ERROR) {
4550                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
4551                 mailimap_search_result_free(lep_uidlist);
4552         } else {
4553                 carray * lep_uidtab;
4554                 if (r != -1) { /* inited */
4555                         imap_handle_error(SESSION(session), NULL, r);
4556                         if (is_fatal(r))
4557                                 return -1;
4558                 }
4559                 r = imap_threaded_fetch_uid(folder, 1,
4560                                     &lep_uidtab);
4561                 if (r == MAILIMAP_NO_ERROR) {
4562                         uidlist = imap_uid_list_from_lep_tab(lep_uidtab);
4563                         imap_fetch_uid_list_free(lep_uidtab);
4564                 }
4565         }
4566
4567         if (r != MAILIMAP_NO_ERROR) {
4568                 imap_handle_error(SESSION(session), NULL, r);
4569                 return -1;
4570         }
4571
4572         for (elem = uidlist; elem != NULL; elem = g_slist_next(elem)) {
4573                 guint msgnum;
4574
4575                 msgnum = GPOINTER_TO_INT(elem->data);
4576
4577                 *msgnum_list = g_slist_prepend(*msgnum_list, GINT_TO_POINTER(msgnum));
4578                 item->uid_list = g_slist_prepend(item->uid_list, GINT_TO_POINTER(msgnum));
4579                 nummsgs++;
4580         }
4581         g_slist_free(uidlist);
4582
4583         return nummsgs;
4584
4585 }
4586
4587 gint imap_get_num_list(Folder *folder, FolderItem *_item, GSList **msgnum_list, gboolean *old_uids_valid)
4588 {
4589         IMAPFolderItem *item = (IMAPFolderItem *)_item;
4590         IMAPSession *session;
4591         gint nummsgs;
4592         GSList *uidlist = NULL;
4593         gchar *dir;
4594         gint known_list_len = 0;
4595         gchar *path;
4596
4597         debug_print("get_num_list\n");
4598
4599         g_return_val_if_fail(folder != NULL, -1);
4600         g_return_val_if_fail(item != NULL, -1);
4601         g_return_val_if_fail(item->item.path != NULL, -1);
4602         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
4603         g_return_val_if_fail(folder->account != NULL, -1);
4604
4605         known_list_len = g_slist_length(item->uid_list);
4606         if (!item->should_update) {
4607                 debug_print("get_num_list: nothing to update\n");
4608                 *old_uids_valid = TRUE;
4609                 if (known_list_len == item->item.total_msgs
4610                  && known_list_len > 0) {
4611                         *msgnum_list = g_slist_copy(item->uid_list);
4612                         return known_list_len;
4613                 } else {
4614                         debug_print("don't know the list length...\n");
4615                 }
4616         }
4617
4618         if (prefs_common.work_offline &&
4619             !inc_offline_should_override(FALSE,
4620                 _("Claws Mail needs network access in order "
4621                   "to access the IMAP server."))) {
4622                 return -1;
4623         }
4624
4625         path = folder_item_get_path(_item);
4626         if (!is_dir_exist(path)) {
4627                 if(is_file_exist(path))
4628                         claws_unlink(path);
4629                 make_dir_hier(path);
4630         }
4631         g_free(path);
4632
4633         debug_print("getting session...\n");
4634         session = imap_session_get(folder);
4635         g_return_val_if_fail(session != NULL, -1);
4636
4637         lock_session(session);
4638         if (FOLDER_ITEM(item)->path)
4639                 statusbar_print_all(_("Scanning folder %s/%s..."),
4640                                       FOLDER_ITEM(item)->folder->name,
4641                                       FOLDER_ITEM(item)->path);
4642         else
4643                 statusbar_print_all(_("Scanning folder %s..."),
4644                                       FOLDER_ITEM(item)->folder->name);
4645
4646         if (item->should_trash_cache) {
4647                 *old_uids_valid = FALSE;
4648                 debug_print("get_num_list: trashing num list\n");
4649                 debug_print("Freeing imap uid cache\n");
4650                 item->lastuid = 0;
4651                 g_slist_free(item->uid_list);
4652                 item->uid_list = NULL;
4653
4654                 imap_delete_all_cached_messages((FolderItem *)item);
4655         } else {
4656                 debug_print("get_num_list: updating num list\n");
4657                 *old_uids_valid = TRUE;
4658         }
4659
4660         nummsgs = get_list_of_uids(session, folder, item, &uidlist);
4661
4662         unlock_session(session);
4663
4664         /* session could be broken now, in case of fatal error */
4665
4666         debug_print("get_num_list: got %d msgs\n", nummsgs);
4667
4668         if (nummsgs < 0) {
4669                 statusbar_pop_all();
4670                 return -1;
4671         }
4672
4673         *msgnum_list = uidlist;
4674
4675         dir = folder_item_get_path((FolderItem *)item);
4676         debug_print("removing old messages from %s\n", dir);
4677         remove_numbered_files_not_in_list(dir, *msgnum_list);
4678         g_free(dir);
4679
4680         debug_print("get_num_list - ok - %i\n", nummsgs);
4681         statusbar_pop_all();
4682         item->should_trash_cache = FALSE;
4683         item->should_update = FALSE;
4684         return nummsgs;
4685 }
4686
4687 static MsgInfo *imap_parse_msg(const gchar *file, FolderItem *item)
4688 {
4689         MsgInfo *msginfo;
4690         MsgFlags flags;
4691
4692         flags.perm_flags = MSG_NEW|MSG_UNREAD;
4693         flags.tmp_flags = 0;
4694
4695         g_return_val_if_fail(item != NULL, NULL);
4696         g_return_val_if_fail(file != NULL, NULL);
4697
4698         if (folder_has_parent_of_type(item, F_QUEUE)) {
4699                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
4700         } else if (folder_has_parent_of_type(item, F_DRAFT)) {
4701                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
4702         }
4703
4704         msginfo = procheader_parse_file(file, flags, FALSE, FALSE);
4705         if (!msginfo) return NULL;
4706
4707         msginfo->plaintext_file = g_strdup(file);
4708         msginfo->folder = item;
4709
4710         return msginfo;
4711 }
4712
4713 GSList *imap_get_msginfos(Folder *folder, FolderItem *item,
4714                           GSList *msgnum_list)
4715 {
4716         IMAPSession *session;
4717         MsgInfoList *ret = NULL;
4718         gint ok;
4719
4720         debug_print("get_msginfos\n");
4721
4722         g_return_val_if_fail(folder != NULL, NULL);
4723         g_return_val_if_fail(item != NULL, NULL);
4724         g_return_val_if_fail(msgnum_list != NULL, NULL);
4725
4726         debug_print("getting session...\n");
4727         session = imap_session_get(folder);
4728         g_return_val_if_fail(session != NULL, NULL);
4729
4730         lock_session(session); /* unlocked later in the function */
4731
4732         debug_print("IMAP getting msginfos\n");
4733         ok = imap_select(session, IMAP_FOLDER(folder), item,
4734                          NULL, NULL, NULL, NULL, NULL, FALSE);
4735         if (ok != MAILIMAP_NO_ERROR) {
4736                 return NULL;
4737         }
4738         if (!(folder_has_parent_of_type(item, F_DRAFT) ||
4739               folder_has_parent_of_type(item, F_QUEUE))) {
4740                 ret = g_slist_concat(ret,
4741                         imap_get_uncached_messages(session, item,
4742                                                    msgnum_list, &ok));
4743                 if (ok != MAILIMAP_NO_ERROR)
4744                         return NULL;
4745                 unlock_session(session);
4746         } else {
4747                 MsgNumberList *sorted_list, *elem, *llast = NULL;
4748                 gint startnum, lastnum;
4749
4750                 unlock_session(session);
4751
4752                 sorted_list = g_slist_sort(g_slist_copy(msgnum_list), g_int_compare);
4753
4754                 startnum = lastnum = GPOINTER_TO_INT(sorted_list->data);
4755
4756                 llast = g_slist_last(ret);
4757                 for (elem = sorted_list;; elem = g_slist_next(elem)) {
4758                         guint num = 0;
4759
4760                         if (elem)
4761                                 num = GPOINTER_TO_INT(elem->data);
4762
4763                         if (num > lastnum + 1 || elem == NULL) {
4764                                 int i;
4765                                 for (i = startnum; i <= lastnum; ++i) {
4766                                         gchar *file;
4767                                         file = imap_fetch_msg(folder, item, i);
4768                                         if (file != NULL) {
4769                                                 MsgInfo *msginfo = imap_parse_msg(file, item);
4770                                                 if (msginfo != NULL) {
4771                                                         msginfo->msgnum = i;
4772                                                         if (llast == NULL)
4773                                                                 llast = ret = g_slist_append(ret, msginfo);
4774                                                         else {
4775                                                                 llast = g_slist_append(llast, msginfo);
4776                                                                 llast = llast->next;
4777                                                         }
4778                                                 }
4779                                                 g_free(file);
4780                                         }
4781                                 }
4782
4783                                 if (elem == NULL)
4784                                         break;
4785
4786                                 startnum = num;
4787                         }
4788                         lastnum = num;
4789                 }
4790
4791                 g_slist_free(sorted_list);
4792         }
4793         return ret;
4794 }
4795
4796 MsgInfo *imap_get_msginfo(Folder *folder, FolderItem *item, gint uid)
4797 {
4798         MsgInfo *msginfo = NULL;
4799         MsgInfoList *msginfolist;
4800         MsgNumberList numlist;
4801
4802         numlist.next = NULL;
4803         numlist.data = GINT_TO_POINTER(uid);
4804
4805         msginfolist = imap_get_msginfos(folder, item, &numlist);
4806         if (msginfolist != NULL) {
4807                 msginfo = msginfolist->data;
4808                 g_slist_free(msginfolist);
4809         }
4810
4811         return msginfo;
4812 }
4813
4814 gboolean imap_scan_required(Folder *folder, FolderItem *_item)
4815 {
4816         IMAPSession *session;
4817         IMAPFolderItem *item = (IMAPFolderItem *)_item;
4818         gint ok, exists = 0, unseen = 0;
4819         guint32 uid_next = 0, uid_val = 0;
4820         gboolean selected_folder;
4821
4822         g_return_val_if_fail(folder != NULL, FALSE);
4823         g_return_val_if_fail(item != NULL, FALSE);
4824         g_return_val_if_fail(item->item.folder != NULL, FALSE);
4825         g_return_val_if_fail(FOLDER_CLASS(item->item.folder) == &imap_class, FALSE);
4826
4827         if (item->item.path == NULL)
4828                 return FALSE;
4829
4830         if (item->should_update) {
4831                 debug_print("scan already required\n");
4832                 return TRUE;
4833         }
4834         debug_print("getting session...\n");
4835         session = imap_session_get(folder);
4836
4837         g_return_val_if_fail(session != NULL, FALSE);
4838         lock_session(session); /* unlocked later in the function */
4839
4840         selected_folder = (session->mbox != NULL) &&
4841                           (!strcmp(session->mbox, item->item.path));
4842         if (selected_folder) {
4843                 if (!session->folder_content_changed) {
4844                         ok = imap_cmd_noop(session);
4845                         if (ok != MAILIMAP_NO_ERROR) {
4846                                 debug_print("disconnected!\n");
4847                                 if (!is_fatal(ok))
4848                                         session = imap_reconnect_if_possible(folder, session);
4849                                 else
4850                                         session = imap_session_get(folder);
4851                                 if (session == NULL)
4852                                         return FALSE;
4853                         }
4854
4855                         if (session->folder_content_changed) {
4856                                 debug_print("CHANGED (self-noop)! scan_required\n");
4857                                 item->should_update = TRUE;
4858                                 if (session->uid_validity && session->uid_validity != item->item.mtime) {
4859                                         item->item.mtime = session->uid_validity;
4860                                         item->should_trash_cache = TRUE;
4861                                 }
4862                                 unlock_session(session);
4863                                 return TRUE;
4864                         }
4865                 } else {
4866                         debug_print("CHANGED (previous noop)! scan_required\n");
4867                         item->should_update = TRUE;
4868                         if (session->uid_validity && session->uid_validity != item->item.mtime) {
4869                                 item->item.mtime = session->uid_validity;
4870                                 item->should_trash_cache = TRUE;
4871                         }
4872                         unlock_session(session);
4873                         return TRUE;
4874                 }
4875         } else {
4876                 ok = imap_status(session, IMAP_FOLDER(folder), item->item.path, IMAP_FOLDER_ITEM(item),
4877                                  &exists, &uid_next, &uid_val, &unseen, FALSE);
4878                 if (ok != MAILIMAP_NO_ERROR) {
4879                         return FALSE;
4880                 }
4881
4882                 debug_print("exists %d, item->item.total_msgs %d\n"
4883                             "\tunseen %d, item->item.unread_msgs %d\n"
4884                             "\tuid_next %d, item->uid_next %d\n"
4885                             "\tuid_val %d, item->item.mtime %ld\n",
4886                             exists, item->item.total_msgs, unseen, item->item.unread_msgs,
4887                             uid_next, item->uid_next, uid_val, (long)(item->item.mtime));
4888                 if (exists != item->item.total_msgs
4889                     || unseen != item->item.unread_msgs
4890                     || uid_next != item->uid_next
4891                     || uid_val != item->item.mtime) {
4892                         debug_print("CHANGED (status)! scan_required\n");
4893                         item->last_change = time(NULL);
4894                         item->should_update = TRUE;
4895                         item->uid_next = uid_next;
4896                         if (uid_val != item->item.mtime) {
4897                                 item->item.mtime = uid_val;
4898                                 item->should_trash_cache = TRUE;
4899                         }
4900                         unlock_session(session);
4901                         return TRUE;
4902                 }
4903         }
4904         unlock_session(session);
4905
4906         item->should_update = FALSE;
4907         return FALSE;
4908 }
4909
4910 void imap_change_flags(Folder *folder, FolderItem *item, MsgInfo *msginfo, MsgPermFlags newflags)
4911 {
4912         IMAPSession *session;
4913         IMAPFlags flags_set = 0, flags_unset = 0;
4914         gint ok = MAILIMAP_NO_ERROR;
4915         MsgNumberList numlist;
4916         hashtable_data *ht_data = NULL;
4917
4918         g_return_if_fail(folder != NULL);
4919         g_return_if_fail(folder->klass == &imap_class);
4920         g_return_if_fail(item != NULL);
4921         g_return_if_fail(item->folder == folder);
4922         g_return_if_fail(msginfo != NULL);
4923         g_return_if_fail(msginfo->folder == item);
4924
4925         if (!MSG_IS_MARKED(msginfo->flags) &&  (newflags & MSG_MARKED))
4926                 flags_set |= IMAP_FLAG_FLAGGED;
4927         if ( MSG_IS_MARKED(msginfo->flags) && !(newflags & MSG_MARKED))
4928                 flags_unset |= IMAP_FLAG_FLAGGED;
4929
4930         if (!MSG_IS_UNREAD(msginfo->flags) &&  (newflags & MSG_UNREAD))
4931                 flags_unset |= IMAP_FLAG_SEEN;
4932         if ( MSG_IS_UNREAD(msginfo->flags) && !(newflags & MSG_UNREAD))
4933                 flags_set |= IMAP_FLAG_SEEN;
4934
4935         if (!MSG_IS_REPLIED(msginfo->flags) &&  (newflags & MSG_REPLIED))
4936                 flags_set |= IMAP_FLAG_ANSWERED;
4937         if ( MSG_IS_REPLIED(msginfo->flags) && !(newflags & MSG_REPLIED))
4938                 flags_unset |= IMAP_FLAG_ANSWERED;
4939
4940         if (!MSG_IS_FORWARDED(msginfo->flags) &&  (newflags & MSG_FORWARDED))
4941                 flags_set |= IMAP_FLAG_FORWARDED;
4942         if ( MSG_IS_FORWARDED(msginfo->flags) && !(newflags & MSG_FORWARDED))
4943                 flags_unset |= IMAP_FLAG_FORWARDED;
4944
4945         if (!MSG_IS_SPAM(msginfo->flags) &&  (newflags & MSG_SPAM)) {
4946                 flags_set |= IMAP_FLAG_SPAM;
4947                 flags_unset |= IMAP_FLAG_HAM;
4948         }
4949         if ( MSG_IS_SPAM(msginfo->flags) && !(newflags & MSG_SPAM)) {
4950                 flags_set |= IMAP_FLAG_HAM;
4951                 flags_unset |= IMAP_FLAG_SPAM;
4952         }
4953         if (!MSG_IS_DELETED(msginfo->flags) &&  (newflags & MSG_DELETED))
4954                 flags_set |= IMAP_FLAG_DELETED;
4955         if ( MSG_IS_DELETED(msginfo->flags) && !(newflags & MSG_DELETED))
4956                 flags_unset |= IMAP_FLAG_DELETED;
4957
4958         if (!flags_set && !flags_unset) {
4959                 /* the changed flags were not translatable to IMAP-speak.
4960                  * like MSG_POSTFILTERED, so just apply. */
4961                 msginfo->flags.perm_flags = newflags;
4962                 return;
4963         }
4964
4965         debug_print("getting session...\n");
4966         session = imap_session_get(folder);
4967         if (!session) {
4968                 return;
4969         }
4970
4971         if ((ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
4972             NULL, NULL, NULL, NULL, NULL, FALSE)) != MAILIMAP_NO_ERROR) {
4973                 return;
4974         }
4975         numlist.next = NULL;
4976         numlist.data = GINT_TO_POINTER(msginfo->msgnum);
4977
4978         if (IMAP_FOLDER_ITEM(item)->batching) {
4979                 /* instead of performing an UID STORE command for each message change,
4980                  * as a lot of them can change "together", we just fill in hashtables
4981                  * and defer the treatment so that we're able to send only one
4982                  * command.
4983                  */
4984                 debug_print("IMAP batch mode on, deferring flags change\n");
4985                 if (flags_set) {
4986                         ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->flags_set_table,
4987                                 GINT_TO_POINTER(flags_set));
4988                         if (ht_data == NULL) {
4989                                 ht_data = g_new0(hashtable_data, 1);
4990                                 ht_data->item = IMAP_FOLDER_ITEM(item);
4991                                 g_hash_table_insert(IMAP_FOLDER_ITEM(item)->flags_set_table,
4992                                         GINT_TO_POINTER(flags_set), ht_data);
4993                         }
4994                         ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
4995                 }
4996                 if (flags_unset) {
4997                         ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->flags_unset_table,
4998                                 GINT_TO_POINTER(flags_unset));
4999                         if (ht_data == NULL) {
5000                                 ht_data = g_new0(hashtable_data, 1);
5001                                 ht_data->item = IMAP_FOLDER_ITEM(item);
5002                                 g_hash_table_insert(IMAP_FOLDER_ITEM(item)->flags_unset_table,
5003                                         GINT_TO_POINTER(flags_unset), ht_data);
5004                         }
5005                         ht_data->msglist = g_slist_prepend(ht_data->msglist,
5006                                         GINT_TO_POINTER(msginfo->msgnum));
5007                 }
5008         } else {
5009                 debug_print("IMAP changing flags\n");
5010                 if (flags_set) {
5011                         ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item), &numlist, flags_set, NULL, TRUE);
5012                         if (ok != MAILIMAP_NO_ERROR) {
5013                                 return;
5014                         }
5015                 }
5016
5017                 if (flags_unset) {
5018                         ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item), &numlist, flags_unset, NULL, FALSE);
5019                         if (ok != MAILIMAP_NO_ERROR) {
5020                                 return;
5021                         }
5022                 }
5023         }
5024         msginfo->flags.perm_flags = newflags;
5025         return;
5026 }
5027
5028 static gint imap_remove_msg(Folder *folder, FolderItem *item, gint uid)
5029 {
5030         gint ok;
5031         IMAPSession *session;
5032         gchar *dir;
5033         MsgNumberList numlist;
5034
5035         g_return_val_if_fail(folder != NULL, -1);
5036         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
5037         g_return_val_if_fail(item != NULL, -1);
5038
5039         debug_print("getting session...\n");
5040         session = imap_session_get(folder);
5041         if (!session) return -1;
5042
5043         ok = imap_select(session, IMAP_FOLDER(folder), item,
5044                          NULL, NULL, NULL, NULL, NULL, FALSE);
5045         if (ok != MAILIMAP_NO_ERROR) {
5046                 return ok;
5047         }
5048         numlist.next = NULL;
5049         numlist.data = GINT_TO_POINTER(uid);
5050
5051         ok = imap_set_message_flags
5052                 (session, IMAP_FOLDER_ITEM(item), &numlist, IMAP_FLAG_DELETED, NULL, TRUE);
5053         if (ok != MAILIMAP_NO_ERROR) {
5054                 log_warning(LOG_PROTOCOL, _("can't set deleted flags: %d\n"), uid);
5055                 return ok;
5056         }
5057
5058         ok = imap_cmd_expunge(session);
5059
5060         if (ok != MAILIMAP_NO_ERROR) {
5061                 log_warning(LOG_PROTOCOL, _("can't expunge\n"));
5062                 return ok;
5063         }
5064
5065         IMAP_FOLDER_ITEM(item)->uid_list = g_slist_remove(
5066             IMAP_FOLDER_ITEM(item)->uid_list, numlist.data);
5067         dir = folder_item_get_path(item);
5068         if (is_dir_exist(dir))
5069                 remove_numbered_files(dir, uid, uid);
5070         g_free(dir);
5071         return MAILIMAP_NO_ERROR;
5072 }
5073
5074 static gint compare_msginfo(gconstpointer a, gconstpointer b)
5075 {
5076         return ((MsgInfo *)a)->msgnum - ((MsgInfo *)b)->msgnum;
5077 }
5078
5079 static guint gslist_find_next_num(MsgNumberList **list, guint num)
5080 {
5081         GSList *elem;
5082
5083         g_return_val_if_fail(list != NULL, -1);
5084
5085         for (elem = *list; elem != NULL; elem = g_slist_next(elem))
5086                 if (GPOINTER_TO_INT(elem->data) >= num)
5087                         break;
5088         *list = elem;
5089         return elem != NULL ? GPOINTER_TO_INT(elem->data) : (gint)-1;
5090 }
5091
5092 static gboolean flag_ok(IMAPFolderItem *item, guint flag)
5093 {
5094         if (item->ok_flags && g_slist_find(item->ok_flags, GUINT_TO_POINTER(flag))) {
5095                 debug_print("flag %d is OK\n", flag);
5096                 return TRUE;
5097         }
5098         if (item->can_create_flags == ITEM_CAN_CREATE_FLAGS) {
5099                 debug_print("creating flags is OK\n");
5100                 return TRUE;
5101         }
5102         return FALSE;
5103 }
5104
5105 /*
5106  * NEW and DELETED flags are not syncronized
5107  * - The NEW/RECENT flags in IMAP folders can not really be directly
5108  *   modified by Sylpheed
5109  * - The DELETE/DELETED flag in IMAP and Sylpheed don't have the same
5110  *   meaning, in IMAP it always removes the messages from the FolderItem
5111  *   in Sylpheed it can mean to move the message to trash
5112  */
5113
5114 typedef struct _get_flags_data {
5115         Folder *folder;
5116         FolderItem *item;
5117         MsgInfoList *msginfo_list;
5118         GHashTable *msgflags;
5119         gboolean full_search;
5120         gboolean done;
5121 } get_flags_data;
5122
5123 static /*gint*/ void *imap_get_flags_thread(void *data)
5124 {
5125         get_flags_data *stuff = (get_flags_data *)data;
5126         Folder *folder = stuff->folder;
5127         FolderItem *fitem = (FolderItem *) stuff->item;
5128         MsgInfoList *msginfo_list = stuff->msginfo_list;
5129         GHashTable *msgflags = stuff->msgflags;
5130         GSList *elem;
5131         carray * lep_uidtab;
5132         IMAPSession *session;
5133         gint ok;
5134         int r = MAILIMAP_NO_ERROR;
5135         GHashTable *flags_hash = NULL;
5136         GHashTable *tags_hash = NULL;
5137         gboolean full_search = stuff->full_search;
5138         GSList *sorted_list = NULL;
5139         GSList *unseen = NULL, *answered = NULL, *flagged = NULL, *deleted = NULL, *forwarded = NULL, *spam = NULL;
5140         GSList *seq_list, *cur;
5141         gboolean reverse_seen = FALSE;
5142         gboolean selected_folder;
5143         gint exists_cnt, unseen_cnt;
5144         gboolean got_alien_tags = FALSE;
5145
5146         session = imap_session_get(folder);
5147
5148         if (session == NULL) {
5149                 stuff->done = TRUE;
5150                 return GINT_TO_POINTER(-1);
5151         }
5152         selected_folder = (session->mbox != NULL) &&
5153                           (!strcmp(session->mbox, fitem->path));
5154
5155         lock_session(session);
5156         if (!selected_folder) {
5157                 ok = imap_select(session, IMAP_FOLDER(folder), fitem,
5158                         &exists_cnt, NULL, &unseen_cnt, NULL, NULL, TRUE);
5159                 if (ok != MAILIMAP_NO_ERROR) {
5160                         stuff->done = TRUE;
5161                         return GINT_TO_POINTER(-1);
5162                 }
5163
5164                 if (unseen_cnt > exists_cnt / 2)
5165                         reverse_seen = TRUE;
5166         }
5167         else {
5168                 if (fitem->unread_msgs > fitem->total_msgs / 2)
5169                         reverse_seen = TRUE;
5170         }
5171
5172         sorted_list = g_slist_sort(g_slist_copy(msginfo_list), compare_msginfo);
5173         if (!full_search) {
5174                 seq_list = imap_get_lep_set_from_msglist(IMAP_FOLDER(folder), msginfo_list);
5175         } else {
5176                 struct mailimap_set * set;
5177                 set = mailimap_set_new_interval(1, 0);
5178                 seq_list = g_slist_append(NULL, set);
5179         }
5180
5181         if (folder->account && folder->account->low_bandwidth) {
5182                 for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
5183                         struct mailimap_set * imapset;
5184                         clist * lep_uidlist;
5185                         int r;
5186
5187                         imapset = cur->data;
5188                         if (reverse_seen) {
5189                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SEEN, NULL,
5190                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5191                         }
5192                         else {
5193                                 r = imap_threaded_search(folder,
5194                                                          IMAP_SEARCH_TYPE_UNSEEN, NULL,
5195                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5196                         }
5197                         if (r == MAILIMAP_NO_ERROR) {
5198                                 GSList * uidlist;
5199
5200                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5201                                 mailimap_search_result_free(lep_uidlist);
5202
5203                                 unseen = g_slist_concat(unseen, uidlist);
5204                         } else {
5205                                 imap_handle_error(SESSION(session), NULL, r);
5206                                 goto bail;
5207                         }
5208
5209                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_FLAGGED, NULL,
5210                                                  NULL, full_search ? NULL:imapset, &lep_uidlist);
5211                         if (r == MAILIMAP_NO_ERROR) {
5212                                 GSList * uidlist;
5213
5214                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5215                                 mailimap_search_result_free(lep_uidlist);
5216
5217                                 flagged = g_slist_concat(flagged, uidlist);
5218                         } else {
5219                                 imap_handle_error(SESSION(session), NULL, r);
5220                                 goto bail;
5221                         }
5222
5223                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
5224                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_ANSWERED, NULL,
5225                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5226                                 if (r == MAILIMAP_NO_ERROR) {
5227                                         GSList * uidlist;
5228
5229                                         uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5230                                         mailimap_search_result_free(lep_uidlist);
5231
5232                                         answered = g_slist_concat(answered, uidlist);
5233                                 } else {
5234                                         imap_handle_error(SESSION(session), NULL, r);
5235                                         goto bail;
5236                                 }
5237
5238                                 if (flag_ok(IMAP_FOLDER_ITEM(fitem), IMAP_FLAG_FORWARDED)) {
5239                                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_FORWARDED, NULL,
5240                                                                  NULL, full_search ? NULL:imapset, &lep_uidlist);
5241                                         if (r == MAILIMAP_NO_ERROR) {
5242                                                 GSList * uidlist;
5243
5244                                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5245                                                 mailimap_search_result_free(lep_uidlist);
5246
5247                                                 forwarded = g_slist_concat(forwarded, uidlist);
5248                                         } else {
5249                                                 imap_handle_error(SESSION(session), NULL, r);
5250                                                 goto bail;
5251                                         }
5252                                 }
5253
5254                                 if (flag_ok(IMAP_FOLDER_ITEM(fitem), IMAP_FLAG_SPAM)) {
5255                                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SPAM, NULL,
5256                                                                  NULL, full_search ? NULL:imapset, &lep_uidlist);
5257                                         if (r == MAILIMAP_NO_ERROR) {
5258                                                 GSList * uidlist;
5259
5260                                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5261                                                 mailimap_search_result_free(lep_uidlist);
5262
5263                                                 spam = g_slist_concat(spam, uidlist);
5264                                         } else {
5265                                                 imap_handle_error(SESSION(session), NULL, r);
5266                                                 goto bail;
5267                                         }
5268                                 }
5269
5270                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_DELETED, NULL,
5271                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5272                                 if (r == MAILIMAP_NO_ERROR) {
5273                                         GSList * uidlist;
5274
5275                                         uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5276                                         mailimap_search_result_free(lep_uidlist);
5277
5278                                         deleted = g_slist_concat(deleted, uidlist);
5279                                 } else {
5280                                         imap_handle_error(SESSION(session), NULL, r);
5281                                         goto bail;
5282                                 }
5283                         }
5284                 }
5285
5286         } else {
5287                 r = imap_threaded_fetch_uid_flags(folder, 1, &lep_uidtab);
5288                 if (r == MAILIMAP_NO_ERROR) {
5289                         flags_hash = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, NULL);
5290                         tags_hash = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, NULL);
5291                         imap_flags_hash_from_lep_uid_flags_tab(lep_uidtab, flags_hash, tags_hash);
5292                         imap_fetch_uid_flags_list_free(lep_uidtab);
5293                 } else {
5294                         imap_handle_error(SESSION(session), NULL, r);
5295                         goto bail;
5296                 }
5297         }
5298
5299 bail:
5300         if (r == MAILIMAP_NO_ERROR)
5301                 unlock_session(session);
5302
5303         for (elem = sorted_list; elem != NULL; elem = g_slist_next(elem)) {
5304                 MsgInfo *msginfo;
5305                 MsgPermFlags flags, oldflags;
5306                 gboolean wasnew;
5307
5308                 msginfo = (MsgInfo *) elem->data;
5309                 flags = msginfo->flags.perm_flags;
5310                 wasnew = (flags & MSG_NEW);
5311                 oldflags = flags & ~(MSG_NEW|MSG_UNREAD|MSG_REPLIED|MSG_FORWARDED|MSG_MARKED|MSG_DELETED|MSG_SPAM);
5312
5313                 if (folder->account && folder->account->low_bandwidth) {
5314                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
5315                                 flags &= ~((reverse_seen ? 0 : MSG_UNREAD | MSG_NEW) | MSG_REPLIED | MSG_FORWARDED | MSG_MARKED | MSG_SPAM);
5316                         } else {
5317                                 flags &= ~((reverse_seen ? 0 : MSG_UNREAD | MSG_NEW | MSG_MARKED));
5318                         }
5319                         if (reverse_seen)
5320                                 flags |= MSG_UNREAD | (wasnew ? MSG_NEW : 0);
5321                         if (gslist_find_next_num(&unseen, msginfo->msgnum) == msginfo->msgnum) {
5322                                 if (!reverse_seen) {
5323                                         flags |= MSG_UNREAD | (wasnew ? MSG_NEW : 0);
5324                                 } else {
5325                                         flags &= ~(MSG_UNREAD | MSG_NEW);
5326                                 }
5327                         }
5328
5329                         if (gslist_find_next_num(&flagged, msginfo->msgnum) == msginfo->msgnum)
5330                                 flags |= MSG_MARKED;
5331                         else
5332                                 flags &= ~MSG_MARKED;
5333
5334                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
5335                                 if (gslist_find_next_num(&answered, msginfo->msgnum) == msginfo->msgnum)
5336                                         flags |= MSG_REPLIED;
5337                                 else
5338                                         flags &= ~MSG_REPLIED;
5339                                 if (gslist_find_next_num(&forwarded, msginfo->msgnum) == msginfo->msgnum)
5340                                         flags |= MSG_FORWARDED;
5341                                 else
5342                                         flags &= ~MSG_FORWARDED;
5343                                 if (gslist_find_next_num(&spam, msginfo->msgnum) == msginfo->msgnum)
5344                                         flags |= MSG_SPAM;
5345                                 else
5346                                         flags &= ~MSG_SPAM;
5347                                 if (gslist_find_next_num(&deleted, msginfo->msgnum) == msginfo->msgnum)
5348                                         flags |= MSG_DELETED;
5349                                 else
5350                                         flags &= ~MSG_DELETED;
5351                         }
5352                 } else {
5353                         if (flags_hash != NULL) {
5354
5355                                 flags = GPOINTER_TO_INT(g_hash_table_lookup(flags_hash,
5356                                                 GINT_TO_POINTER(msginfo->msgnum)));
5357                         }
5358
5359                         if ((flags & MSG_UNREAD) == 0)
5360                                 flags &= ~MSG_NEW;
5361                         else if (wasnew)
5362                                 flags |= MSG_NEW;
5363                         flags |= oldflags;
5364
5365                         if (tags_hash != NULL) {
5366                                 GSList *tags = g_hash_table_lookup(tags_hash, GINT_TO_POINTER(msginfo->msgnum));
5367                                 GSList *cur;
5368
5369                                 g_slist_free(msginfo->tags);
5370                                 msginfo->tags = NULL;
5371
5372                                 for (cur = tags; cur; cur = cur->next) {
5373                                         gchar *real_tag = imap_modified_utf7_to_utf8(cur->data, TRUE);
5374                                         gint id = 0;
5375                                         id = tags_get_id_for_str(real_tag);
5376                                         if (id == -1) {
5377                                                 id = tags_add_tag(real_tag);
5378                                                 got_alien_tags = TRUE;
5379                                         }
5380                                         msginfo->tags = g_slist_append(
5381                                                                 msginfo->tags,
5382                                                                 GINT_TO_POINTER(id));
5383                                         g_free(real_tag);
5384                                 }
5385                                 slist_free_strings_full(tags);
5386                         }
5387                 }
5388
5389                 g_hash_table_insert(msgflags, msginfo, GINT_TO_POINTER(flags));
5390         }
5391
5392         if (got_alien_tags) {
5393                 tags_write_tags();
5394                 main_window_reflect_tags_changes(mainwindow_get_mainwindow());
5395         }
5396
5397         if (flags_hash)
5398                 g_hash_table_destroy(flags_hash);
5399         if (tags_hash)
5400                 g_hash_table_destroy(tags_hash);
5401
5402         imap_lep_set_free(seq_list);
5403         g_slist_free(flagged);
5404         g_slist_free(deleted);
5405         g_slist_free(answered);
5406         g_slist_free(forwarded);
5407         g_slist_free(spam);
5408         g_slist_free(unseen);
5409         g_slist_free(sorted_list);
5410
5411         stuff->done = TRUE;
5412         return GINT_TO_POINTER(0);
5413 }
5414
5415 static gint imap_get_flags(Folder *folder, FolderItem *item,
5416                            MsgInfoList *msginfo_list, GHashTable *msgflags)
5417 {
5418         gint result;
5419         get_flags_data *data = g_new0(get_flags_data, 1);
5420         data->done = FALSE;
5421         data->folder = folder;
5422         data->item = item;
5423         data->msginfo_list = msginfo_list;
5424         data->msgflags = msgflags;
5425         data->full_search = FALSE;
5426
5427         GSList *tmp = NULL, *cur;
5428
5429         if (prefs_common.work_offline &&
5430             !inc_offline_should_override(FALSE,
5431                 _("Claws Mail needs network access in order "
5432                   "to access the IMAP server."))) {
5433                 g_free(data);
5434                 return -1;
5435         }
5436
5437         tmp = folder_item_get_msg_list(item);
5438
5439         if (g_slist_length(tmp) <= g_slist_length(msginfo_list))
5440                 data->full_search = TRUE;
5441
5442         for (cur = tmp; cur; cur = cur->next)
5443                 procmsg_msginfo_free((MsgInfo **)&(cur->data));
5444
5445         g_slist_free(tmp);
5446
5447         result = GPOINTER_TO_INT(imap_get_flags_thread(data));
5448
5449         g_free(data);
5450         return result;
5451
5452 }
5453
5454 static gboolean process_flags(gpointer key, gpointer value, gpointer user_data)
5455 {
5456         gboolean flags_set = GPOINTER_TO_INT(user_data);
5457         gint flags_value = GPOINTER_TO_INT(key);
5458         hashtable_data *data = (hashtable_data *)value;
5459         IMAPFolderItem *_item = data->item;
5460         FolderItem *item = (FolderItem *)_item;
5461         gint ok = MAILIMAP_ERROR_BAD_STATE;
5462         IMAPSession *session = NULL;
5463
5464         debug_print("getting session...\n");
5465         session = imap_session_get(item->folder);
5466
5467         data->msglist = g_slist_reverse(data->msglist);
5468
5469         debug_print("IMAP %ssetting flags to %d for %d messages\n",
5470                 flags_set?"":"un",
5471                 flags_value,
5472                 g_slist_length(data->msglist));
5473
5474         lock_session(session);
5475         if (session) {
5476                 ok = imap_select(session, IMAP_FOLDER(item->folder), item,
5477                          NULL, NULL, NULL, NULL, NULL, FALSE);
5478         }
5479         if (ok == MAILIMAP_NO_ERROR) {
5480                 ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item),
5481                         data->msglist, flags_value, NULL, flags_set);
5482         } else {
5483                 g_warning("can't select mailbox %s", item->path);
5484         }
5485
5486         if (!is_fatal(ok))
5487                 unlock_session(session);
5488
5489         g_slist_free(data->msglist);
5490         g_free(data);
5491         return TRUE;
5492 }
5493
5494 static gboolean process_tags(gpointer key, gpointer value, gpointer user_data)
5495 {
5496         gboolean tags_set = GPOINTER_TO_INT(user_data);
5497         TagsData *data = (TagsData *)value;
5498         IMAPFolderItem *_item = data->item;
5499         FolderItem *item = (FolderItem *)_item;
5500         gchar *str = data->str;
5501         gint ok = MAILIMAP_ERROR_BAD_STATE;
5502         IMAPSession *session = NULL;
5503
5504         debug_print("getting session...\n");
5505         session = imap_session_get(item->folder);
5506
5507         data->msglist = g_slist_reverse(data->msglist);
5508
5509         debug_print("IMAP %ssetting tags %s for %d messages\n",
5510                 tags_set?"":"un",
5511                 str,
5512                 g_slist_length(data->msglist));
5513
5514         lock_session(session);
5515         if (session) {
5516                 ok = imap_select(session, IMAP_FOLDER(item->folder), item,
5517                          NULL, NULL, NULL, NULL, NULL, FALSE);
5518         }
5519         if (ok == MAILIMAP_NO_ERROR) {
5520                 GSList list;
5521                 list.data = str;
5522                 list.next = NULL;
5523                 ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item),
5524                         data->msglist, 0, &list, tags_set);
5525         } else {
5526                 g_warning("can't select mailbox %s", item->path);
5527         }
5528
5529         if (!is_fatal(ok))
5530                 unlock_session(session);
5531
5532         g_slist_free(data->msglist);
5533         g_free(data->str);
5534         g_free(data);
5535         return TRUE;
5536 }
5537
5538 static void process_hashtable(IMAPFolderItem *item)
5539 {
5540         if (item->flags_set_table) {
5541                 g_hash_table_foreach_remove(item->flags_set_table, process_flags, GINT_TO_POINTER(TRUE));
5542                 g_hash_table_destroy(item->flags_set_table);
5543                 item->flags_set_table = NULL;
5544         }
5545         if (item->flags_unset_table) {
5546                 g_hash_table_foreach_remove(item->flags_unset_table, process_flags, GINT_TO_POINTER(FALSE));
5547                 g_hash_table_destroy(item->flags_unset_table);
5548                 item->flags_unset_table = NULL;
5549         }
5550         if (item->tags_set_table) {
5551                 g_hash_table_foreach_remove(item->tags_set_table, process_tags, GINT_TO_POINTER(TRUE));
5552                 g_hash_table_destroy(item->tags_set_table);
5553                 item->tags_set_table = NULL;
5554         }
5555         if (item->tags_unset_table) {
5556                 g_hash_table_foreach_remove(item->tags_unset_table, process_tags, GINT_TO_POINTER(FALSE));
5557                 g_hash_table_destroy(item->tags_unset_table);
5558                 item->tags_unset_table = NULL;
5559         }
5560
5561 }
5562
5563 static void imap_set_batch (Folder *folder, FolderItem *_item, gboolean batch)
5564 {
5565         IMAPFolderItem *item = (IMAPFolderItem *)_item;
5566         IMAPSession *session;
5567
5568         g_return_if_fail(item != NULL);
5569
5570         if (item->batching == batch)
5571                 return;
5572
5573         if (batch) {
5574                 item->batching = TRUE;
5575                 debug_print("IMAP switching to batch mode\n");
5576                 if (!item->flags_set_table) {
5577                         item->flags_set_table = g_hash_table_new(NULL, g_direct_equal);
5578                 }
5579                 if (!item->flags_unset_table) {
5580                         item->flags_unset_table = g_hash_table_new(NULL, g_direct_equal);
5581                 }
5582                 if (!item->tags_set_table) {
5583                         item->tags_set_table = g_hash_table_new(NULL, g_direct_equal);
5584                 }
5585                 if (!item->tags_unset_table) {
5586                         item->tags_unset_table = g_hash_table_new(NULL, g_direct_equal);
5587                 }
5588                 session = imap_session_get(folder);
5589                 if (session) {
5590                         imap_refresh_sensitivity(session);
5591                         session->sens_update_block = TRUE;
5592                 }
5593         } else {
5594                 debug_print("IMAP switching away from batch mode\n");
5595                 /* process stuff */
5596                 process_hashtable(item);
5597                 item->batching = FALSE;
5598                 session = imap_session_get(folder);
5599                 if (session) {
5600                         session->sens_update_block = FALSE;
5601                         imap_refresh_sensitivity(session);
5602                 }
5603         }
5604 }
5605
5606
5607
5608 /* data types conversion libetpan <-> claws */
5609
5610
5611
5612 #define ETPAN_IMAP_MB_MARKED      1
5613 #define ETPAN_IMAP_MB_UNMARKED    2
5614 #define ETPAN_IMAP_MB_NOSELECT    4
5615 #define ETPAN_IMAP_MB_NOINFERIORS 8
5616
5617 static int imap_flags_to_flags(struct mailimap_mbx_list_flags * imap_flags)
5618 {
5619   int flags;
5620   clistiter * cur;
5621
5622   flags = 0;
5623   if (imap_flags->mbf_type == MAILIMAP_MBX_LIST_FLAGS_SFLAG) {
5624     switch (imap_flags->mbf_sflag) {
5625     case MAILIMAP_MBX_LIST_SFLAG_MARKED:
5626       flags |= ETPAN_IMAP_MB_MARKED;
5627       break;
5628     case MAILIMAP_MBX_LIST_SFLAG_NOSELECT:
5629       flags |= ETPAN_IMAP_MB_NOSELECT;
5630       break;
5631     case MAILIMAP_MBX_LIST_SFLAG_UNMARKED:
5632       flags |= ETPAN_IMAP_MB_UNMARKED;
5633       break;
5634     }
5635   }
5636
5637   if (imap_flags->mbf_oflags) {
5638     for(cur = clist_begin(imap_flags->mbf_oflags) ; cur != NULL ;
5639         cur = clist_next(cur)) {
5640       struct mailimap_mbx_list_oflag * oflag;
5641
5642       oflag = clist_content(cur);
5643
5644       switch (oflag->of_type) {
5645       case MAILIMAP_MBX_LIST_OFLAG_NOINFERIORS:
5646         flags |= ETPAN_IMAP_MB_NOINFERIORS;
5647         break;
5648       }
5649     }
5650   }
5651   return flags;
5652 }
5653
5654 static GSList * imap_list_from_lep(IMAPFolder * folder,
5655                                    clist * list, const gchar * real_path, gboolean all)
5656 {
5657         clistiter * iter;
5658         GSList * item_list = NULL, *llast = NULL;
5659
5660         if (list) {
5661                 for(iter = clist_begin(list) ; iter != NULL ;
5662                     iter = clist_next(iter)) {
5663                         struct mailimap_mailbox_list * mb;
5664                         int flags;
5665                         char delimiter;
5666                         char * name;
5667                         char * dup_name;
5668                         gchar * base;
5669                         gchar * loc_name;
5670                         gchar * loc_path;
5671                         FolderItem *new_item;
5672
5673                         mb = clist_content(iter);
5674
5675                         if (mb == NULL)
5676                                 continue;
5677
5678                         flags = 0;
5679                         if (mb->mb_flag != NULL)
5680                                 flags = imap_flags_to_flags(mb->mb_flag);
5681
5682                         delimiter = mb->mb_delimiter;
5683                         name = mb->mb_name;
5684
5685                         dup_name = strdup(name);
5686                         if (delimiter != '\0')
5687                                 subst_char(dup_name, delimiter, '/');
5688
5689                         base = g_path_get_basename(dup_name);
5690                         if (base[0] == '.') {
5691                                 g_free(base);
5692                                 free(dup_name);
5693                                 continue;
5694                         }
5695                         if (!all && path_cmp(name, real_path) == 0) {
5696                                 g_free(base);
5697                                 free(dup_name);
5698                                 continue;
5699                         }
5700
5701                         if (!all && dup_name[strlen(dup_name)-1] == '/') {
5702                                 g_free(base);
5703                                 free(dup_name);
5704                                 continue;
5705                         }
5706
5707                         loc_name = imap_modified_utf7_to_utf8(base, FALSE);
5708                         loc_path = imap_modified_utf7_to_utf8(dup_name, FALSE);
5709
5710                         new_item = folder_item_new(FOLDER(folder), loc_name, loc_path);
5711                         if ((flags & ETPAN_IMAP_MB_NOINFERIORS) != 0)
5712                                 new_item->no_sub = TRUE;
5713                         if (strcasecmp(dup_name, "INBOX") != 0 &&
5714                             ((flags & ETPAN_IMAP_MB_NOSELECT) != 0))
5715                                 new_item->no_select = TRUE;
5716
5717                         if (item_list == NULL)
5718                                 llast = item_list = g_slist_append(item_list, new_item);
5719                         else {
5720                                 llast = g_slist_append(llast, new_item);
5721                                 llast = llast->next;
5722                         }
5723                         debug_print("folder '%s' found.\n", loc_path);
5724                         g_free(base);
5725                         g_free(loc_path);
5726                         g_free(loc_name);
5727
5728                         free(dup_name);
5729                 }
5730         }
5731         return item_list;
5732 }
5733
5734 static GSList * imap_get_lep_set_from_numlist(IMAPFolder *folder, MsgNumberList *numlist)
5735 {
5736         GSList *sorted_list, *cur;
5737         guint first, last, next;
5738         GSList *ret_list = NULL, *llast = NULL;
5739         struct mailimap_set * current_set;
5740         unsigned int item_count;
5741
5742         if (numlist == NULL)
5743                 return NULL;
5744
5745         current_set = mailimap_set_new_empty();
5746
5747         sorted_list = g_slist_copy(numlist);
5748         sorted_list = g_slist_sort(sorted_list, g_int_compare);
5749
5750         first = GPOINTER_TO_INT(sorted_list->data);
5751
5752         item_count = 0;
5753         for (cur = sorted_list; cur != NULL; cur = g_slist_next(cur)) {
5754                 if (GPOINTER_TO_INT(cur->data) == 0)
5755                         continue;
5756
5757                 item_count ++;
5758
5759                 last = GPOINTER_TO_INT(cur->data);
5760                 if (cur->next)
5761                         next = GPOINTER_TO_INT(cur->next->data);
5762                 else
5763                         next = 0;
5764
5765                 if (last + 1 != next || next == 0 || item_count >= folder->max_set_size) {
5766
5767                         struct mailimap_set_item * item;
5768                         item = mailimap_set_item_new(first, last);
5769                         mailimap_set_add(current_set, item);
5770
5771                         first = next;
5772
5773                         if (item_count >= folder->max_set_size) {
5774                                 if (ret_list == NULL)
5775                                         llast = ret_list = g_slist_append(ret_list,
5776                                                           current_set);
5777                                 else {
5778                                         llast = g_slist_append(llast, current_set);
5779                                         llast = llast->next;
5780                                 }
5781
5782                                 current_set = mailimap_set_new_empty();
5783                                 item_count = 0;
5784                         }
5785                 }
5786         }
5787
5788         if (clist_count(current_set->set_list) > 0) {
5789                 ret_list = g_slist_append(ret_list,
5790                                           current_set);
5791         }
5792
5793         g_slist_free(sorted_list);
5794
5795         return ret_list;
5796 }
5797
5798 static GSList * imap_get_lep_set_from_msglist(IMAPFolder *folder, MsgInfoList *msglist)
5799 {
5800         MsgNumberList *numlist = NULL;
5801         GSList *seq_list;
5802
5803         numlist = procmsg_get_number_list_for_msgs(msglist);
5804
5805         seq_list = imap_get_lep_set_from_numlist(folder, numlist);
5806         g_slist_free(numlist);
5807
5808         return seq_list;
5809 }
5810
5811 static GSList * imap_uid_list_from_lep(clist * list, gint* length)
5812 {
5813         clistiter * iter;
5814         GSList * result;
5815         gint len = 0;
5816
5817         result = NULL;
5818
5819         if (list) {
5820                 for(iter = clist_begin(list) ; iter != NULL ;
5821                     iter = clist_next(iter)) {
5822                         uint32_t * puid;
5823
5824                         puid = clist_content(iter);
5825                         result = g_slist_prepend(result, GINT_TO_POINTER(* puid));
5826                         len++;
5827                 }
5828                 result = g_slist_reverse(result);
5829         }
5830         if (length)
5831                 *length = len;
5832         return result;
5833 }
5834
5835 static GSList * imap_uid_list_from_lep_tab(carray * list)
5836 {
5837         unsigned int i;
5838         GSList * result;
5839
5840         result = NULL;
5841
5842         for(i = 0 ; i < carray_count(list) ; i ++) {
5843                 uint32_t * puid;
5844
5845                 puid = carray_get(list, i);
5846                 result = g_slist_prepend(result, GINT_TO_POINTER(* puid));
5847         }
5848         result = g_slist_reverse(result);
5849         return result;
5850 }
5851
5852 static void imap_flags_hash_from_lep_uid_flags_tab(carray * list,
5853                                                    GHashTable * hash,
5854                                                    GHashTable * tags_hash)
5855 {
5856         unsigned int i;
5857
5858         for(i = 0 ; i < carray_count(list) ; i += 3) {
5859                 uint32_t * puid;
5860                 int * pflags;
5861                 GSList *tags;
5862
5863                 puid = carray_get(list, i);
5864                 pflags = carray_get(list, i + 1);
5865                 tags = carray_get(list, i + 2);
5866
5867                 g_hash_table_insert(hash, GINT_TO_POINTER(*puid), GINT_TO_POINTER(* pflags));
5868                 g_hash_table_insert(tags_hash, GINT_TO_POINTER(*puid), tags);
5869         }
5870 }
5871
5872 static MsgInfo *imap_envelope_from_lep(struct imap_fetch_env_info * info,
5873                                        FolderItem *item)
5874 {
5875         MsgInfo *msginfo = NULL;
5876         guint32 uid = 0;
5877         goffset size = 0;
5878         MsgFlags flags = {0, 0};
5879
5880         if (info->headers == NULL)
5881                 return NULL;
5882
5883         MSG_SET_TMP_FLAGS(flags, MSG_IMAP);
5884         if (folder_has_parent_of_type(item, F_QUEUE)) {
5885                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
5886         } else if (folder_has_parent_of_type(item, F_DRAFT)) {
5887                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
5888         }
5889         flags.perm_flags = info->flags;
5890
5891         uid = info->uid;
5892         size = (goffset) info->size;
5893         msginfo = procheader_parse_str(info->headers, flags, FALSE, FALSE);
5894
5895         if (msginfo) {
5896                 msginfo->msgnum = uid;
5897                 msginfo->size = size;
5898         }
5899
5900         return msginfo;
5901 }
5902
5903 static void imap_lep_set_free(GSList *seq_list)
5904 {
5905         GSList * cur;
5906
5907         for(cur = seq_list ; cur != NULL ; cur = g_slist_next(cur)) {
5908                 struct mailimap_set * imapset;
5909
5910                 imapset = cur->data;
5911                 mailimap_set_free(imapset);
5912         }
5913         g_slist_free(seq_list);
5914 }
5915
5916 static struct mailimap_flag_list * imap_flag_to_lep(IMAPFolderItem *item, IMAPFlags flags, GSList *tags)
5917 {
5918         struct mailimap_flag_list * flag_list;
5919         GSList *cur = tags;
5920
5921         flag_list = mailimap_flag_list_new_empty();
5922
5923         if (IMAP_IS_SEEN(flags))
5924                 mailimap_flag_list_add(flag_list,
5925                                        mailimap_flag_new_seen());
5926         if (IMAP_IS_ANSWERED(flags))
5927                 mailimap_flag_list_add(flag_list,
5928                                        mailimap_flag_new_answered());
5929         if (IMAP_IS_FLAGGED(flags))
5930                 mailimap_flag_list_add(flag_list,
5931                                        mailimap_flag_new_flagged());
5932         if (IMAP_IS_DELETED(flags))
5933                 mailimap_flag_list_add(flag_list,
5934                                        mailimap_flag_new_deleted());
5935         if (IMAP_IS_DRAFT(flags))
5936                 mailimap_flag_list_add(flag_list,
5937                                        mailimap_flag_new_draft());
5938         if (IMAP_IS_FORWARDED(flags) && flag_ok(item, IMAP_FLAG_FORWARDED))
5939                 mailimap_flag_list_add(flag_list,
5940                                        mailimap_flag_new_flag_keyword(strdup(RTAG_FORWARDED)));
5941         if (IMAP_IS_SPAM(flags) && flag_ok(item, IMAP_FLAG_SPAM))
5942                 mailimap_flag_list_add(flag_list,
5943                                        mailimap_flag_new_flag_keyword(strdup(RTAG_JUNK)));
5944         else if (IMAP_IS_HAM(flags) && flag_ok(item, IMAP_FLAG_HAM))
5945                 mailimap_flag_list_add(flag_list,
5946                                        mailimap_flag_new_flag_keyword(strdup(RTAG_NON_JUNK)));
5947
5948         for (; cur; cur = cur->next) {
5949                 gchar *enc_str =
5950                         imap_utf8_to_modified_utf7(cur->data, TRUE);
5951                 g_strstrip(enc_str);
5952
5953                 mailimap_flag_list_add(flag_list,
5954                         mailimap_flag_new_flag_keyword(enc_str));
5955         }
5956
5957         return flag_list;
5958 }
5959
5960 guint imap_folder_get_refcnt(Folder *folder)
5961 {
5962         return ((IMAPFolder *)folder)->refcnt;
5963 }
5964
5965 void imap_folder_ref(Folder *folder)
5966 {
5967         ((IMAPFolder *)folder)->refcnt++;
5968 }
5969
5970 void imap_disconnect_all(gboolean have_connectivity)
5971 {
5972         GList *list;
5973         gboolean short_timeout;
5974 #ifdef HAVE_NETWORKMANAGER_SUPPORT
5975         GError *error = NULL;
5976
5977         short_timeout = !networkmanager_is_online(&error);
5978         if(error) {
5979                 short_timeout = TRUE;
5980                 g_error_free(error);
5981         }
5982 #else
5983         short_timeout = TRUE;
5984 #endif
5985
5986         if(short_timeout)
5987                 imap_main_set_timeout(1);
5988
5989         for (list = account_get_list(); list != NULL; list = list->next) {
5990                 PrefsAccount *account = list->data;
5991                 if (account->protocol == A_IMAP4) {
5992                         RemoteFolder *folder = (RemoteFolder *)account->folder;
5993                         if (folder && folder->session) {
5994                                 if (imap_is_busy(FOLDER(folder)))
5995                                         imap_threaded_cancel(FOLDER(folder));
5996
5997                                 IMAPSession *session = (IMAPSession *)folder->session;
5998                                 if (have_connectivity)
5999                                         imap_threaded_disconnect(FOLDER(folder));
6000                                 SESSION(session)->state = SESSION_DISCONNECTED;
6001                                 SESSION(session)->sock = NULL;
6002                                 imap_safe_destroy(session);
6003                                 folder->session = NULL;
6004                         }
6005                 }
6006         }
6007
6008         if(short_timeout)
6009                 imap_main_set_timeout(prefs_common.io_timeout_secs);
6010 }
6011
6012 void imap_folder_unref(Folder *folder)
6013 {
6014         if (((IMAPFolder *)folder)->refcnt > 0)
6015                 ((IMAPFolder *)folder)->refcnt--;
6016 }
6017
6018 void imap_cancel_all(void)
6019 {
6020         GList *folderlist;
6021         GList *cur;
6022
6023         folderlist = folder_get_list();
6024         for (cur = folderlist; cur != NULL; cur = g_list_next(cur)) {
6025                 Folder *folder = (Folder *) cur->data;
6026
6027                 if (folder->klass == &imap_class) {
6028                         if (imap_is_busy(folder)) {
6029                                 IMAPSession *imap_session;
6030                                 RemoteFolder *rfolder;
6031
6032                                 g_printerr("cancelled\n");
6033                                 imap_threaded_cancel(folder);
6034                                 rfolder = (RemoteFolder *) folder;
6035                                 imap_session = (IMAPSession *) rfolder->session;
6036                                 if (imap_session)
6037                                         imap_session->cancelled = 1;
6038                         }
6039                 }
6040         }
6041 }
6042
6043 gboolean imap_cancel_all_enabled(void)
6044 {
6045         GList *folderlist;
6046         GList *cur;
6047
6048         folderlist = folder_get_list();
6049         for (cur = folderlist; cur != NULL; cur = g_list_next(cur)) {
6050                 Folder *folder = (Folder *) cur->data;
6051
6052                 if (folder->klass == &imap_class) {
6053                         if (imap_is_busy(folder)) {
6054                                 return TRUE;
6055                         }
6056                 }
6057         }
6058
6059         return FALSE;
6060 }
6061
6062 static gboolean imap_is_busy(Folder *folder)
6063 {
6064         IMAPSession *imap_session;
6065         RemoteFolder *rfolder;
6066
6067         rfolder = (RemoteFolder *) folder;
6068         imap_session = (IMAPSession *) rfolder->session;
6069         if (imap_session == NULL)
6070                 return FALSE;
6071
6072         return imap_session->busy;
6073 }
6074
6075 #else /* HAVE_LIBETPAN */
6076
6077 static FolderClass imap_class;
6078
6079 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item);
6080 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag);
6081
6082 static Folder   *imap_folder_new        (const gchar    *name,
6083                                          const gchar    *path)
6084 {
6085         static gboolean missing_imap_warning = TRUE;
6086         if (missing_imap_warning) {
6087                 missing_imap_warning = FALSE;
6088                 alertpanel_error(
6089                         _("You have one or more IMAP accounts "
6090                           "defined. However this version of "
6091                           "Claws Mail has been built without "
6092                           "IMAP support; your IMAP accounts are "
6093                           "disabled.\n\n"
6094                           "You probably need to "
6095                           "install libetpan and recompile "
6096                           "Claws Mail."));
6097         }
6098         return NULL;
6099 }
6100 static gint     imap_create_tree        (Folder         *folder)
6101 {
6102         return -1;
6103 }
6104 static FolderItem *imap_create_folder   (Folder         *folder,
6105                                          FolderItem     *parent,
6106                                          const gchar    *name)
6107 {
6108         return NULL;
6109 }
6110 static gint     imap_rename_folder      (Folder         *folder,
6111                                          FolderItem     *item,
6112                                          const gchar    *name)
6113 {
6114         return -1;
6115 }
6116
6117 gchar imap_get_path_separator_for_item(FolderItem *item)
6118 {
6119         return '/';
6120 }
6121
6122 FolderClass *imap_get_class(void)
6123 {
6124         if (imap_class.idstr == NULL) {
6125                 imap_class.type = F_IMAP;
6126                 imap_class.idstr = "imap";
6127                 imap_class.uistr = "IMAP4";
6128
6129                 imap_class.new_folder = imap_folder_new;
6130                 imap_class.create_tree = imap_create_tree;
6131                 imap_class.create_folder = imap_create_folder;
6132                 imap_class.rename_folder = imap_rename_folder;
6133
6134                 imap_class.set_xml = folder_set_xml;
6135                 imap_class.get_xml = folder_get_xml;
6136                 imap_class.item_set_xml = imap_item_set_xml;
6137                 imap_class.item_get_xml = imap_item_get_xml;
6138                 /* nothing implemented */
6139         }
6140
6141         return &imap_class;
6142 }
6143
6144 void imap_disconnect_all(gboolean have_connectivity)
6145 {
6146 }
6147
6148 gint imap_subscribe(Folder *folder, FolderItem *item, gchar *rpath, gboolean sub)
6149 {
6150         return -1;
6151 }
6152
6153 GList * imap_scan_subtree(Folder *folder, FolderItem *item, gboolean unsubs_only, gboolean recursive)
6154 {
6155         return NULL;
6156 }
6157
6158 void imap_cache_msg(FolderItem *item, gint msgnum)
6159 {
6160 }
6161
6162 void imap_cancel_all(void)
6163 {
6164 }
6165
6166 gboolean imap_cancel_all_enabled(void)
6167 {
6168         return FALSE;
6169 }
6170
6171 #endif
6172
6173 #ifdef HAVE_LIBETPAN
6174 static void imap_synchronise(FolderItem *item, gint days)
6175 {
6176         if (IMAP_FOLDER_ITEM(item)->last_sync == IMAP_FOLDER_ITEM(item)->last_change) {
6177                 debug_print("%s already synced\n", item->path?item->path:item->name);
6178                 return;
6179         }
6180         debug_print("syncing %s\n", item->path?item->path:item->name);
6181         imap_gtk_synchronise(item, days);
6182         IMAP_FOLDER_ITEM(item)->last_sync = IMAP_FOLDER_ITEM(item)->last_change;
6183 }
6184 #endif
6185
6186 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag)
6187 {
6188 #ifdef HAVE_LIBETPAN
6189         GList *cur;
6190 #endif
6191         folder_item_set_xml(folder, item, tag);
6192
6193 #ifdef HAVE_LIBETPAN
6194         for (cur = tag->attr; cur != NULL; cur = g_list_next(cur)) {
6195                 XMLAttr *attr = (XMLAttr *) cur->data;
6196
6197                 if (!attr || !attr->name || !attr->value) continue;
6198                 if (!strcmp(attr->name, "uidnext"))
6199                         IMAP_FOLDER_ITEM(item)->uid_next = atoi(attr->value);
6200                 if (!strcmp(attr->name, "last_sync"))
6201                         IMAP_FOLDER_ITEM(item)->last_sync = atoi(attr->value);
6202                 if (!strcmp(attr->name, "last_change"))
6203                         IMAP_FOLDER_ITEM(item)->last_change = atoi(attr->value);
6204         }
6205         if (IMAP_FOLDER_ITEM(item)->last_change == 0)
6206                 IMAP_FOLDER_ITEM(item)->last_change = time(NULL);
6207 #endif
6208 }
6209
6210 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item)
6211 {
6212         XMLTag *tag;
6213
6214         tag = folder_item_get_xml(folder, item);
6215
6216 #ifdef HAVE_LIBETPAN
6217         xml_tag_add_attr(tag, xml_attr_new_int("uidnext",
6218                         IMAP_FOLDER_ITEM(item)->uid_next));
6219         xml_tag_add_attr(tag, xml_attr_new_int("last_sync",
6220                         IMAP_FOLDER_ITEM(item)->last_sync));
6221         xml_tag_add_attr(tag, xml_attr_new_int("last_change",
6222                         IMAP_FOLDER_ITEM(item)->last_change));
6223
6224 #endif
6225         return tag;
6226 }
6227
6228 /* ===================================================================
6229  * UTF-7 conversion routines as in RFC 2192
6230  * ===================================================================
6231  * These two functions from:
6232  * libimap library.
6233  * Copyright (C) 2003-2004 Pawel Salek. */
6234
6235 /* UTF7 modified base64 alphabet */
6236 static char base64chars[] =
6237   "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+,";
6238 #define UNDEFINED 64
6239
6240 /* UTF16 definitions */
6241 #define UTF16MASK       0x03FFUL
6242 #define UTF16SHIFT      10
6243 #define UTF16BASE       0x10000UL
6244 #define UTF16HIGHSTART  0xD800UL
6245 #define UTF16HIGHEND    0xDBFFUL
6246 #define UTF16LOSTART    0xDC00UL
6247 #define UTF16LOEND      0xDFFFUL
6248
6249
6250 /* Convert an IMAP mailbox to a UTF-8 string.
6251  *  dst needs to have roughly 4 times the storage space of src
6252  *    Hex encoding can triple the size of the input
6253  *    UTF-7 can be slightly denser than UTF-8
6254  *     (worst case: 8 octets UTF-7 becomes 9 octets UTF-8)
6255  */
6256 char* imap_modified_utf7_to_utf8(const char *mbox, gboolean change_spaces)
6257 {
6258   unsigned c, i, bitcount;
6259   unsigned long ucs4, utf16, bitbuf;
6260   unsigned char base64[256];
6261   const char *src;
6262   char *dst, *res  = g_malloc(2*strlen(mbox)+1);
6263
6264   dst = res;
6265   src = mbox;
6266   if(!dst) return NULL;
6267   /* initialize modified base64 decoding table */
6268   memset(base64, UNDEFINED, sizeof (base64));
6269   for (i = 0; i < sizeof (base64chars); ++i) {
6270     base64[(unsigned)base64chars[i]] = i;
6271   }
6272
6273   /* loop until end of string */
6274   while (*src != '\0') {
6275     c = *src++;
6276     /* deal with literal characters and &- */
6277     if (c != '&' || *src == '-') {
6278       /* encode literally */
6279       if (change_spaces && c == '_')
6280         *dst++ = ' ';
6281       else
6282         *dst++ = c;
6283       /* skip over the '-' if this is an &- sequence */
6284       if (c == '&') ++src;
6285     } else {
6286       /* convert modified UTF-7 -> UTF-16 -> UCS-4 -> UTF-8 -> HEX */
6287       bitbuf = 0;
6288       bitcount = 0;
6289       ucs4 = 0;
6290       while ((c = base64[(unsigned char) *src]) != UNDEFINED) {
6291         ++src;
6292         bitbuf = (bitbuf << 6) | c;
6293         bitcount += 6;
6294         /* enough bits for a UTF-16 character? */
6295         if (bitcount >= 16) {
6296           bitcount -= 16;
6297           utf16 = (bitcount ? bitbuf >> bitcount
6298                    : bitbuf) & 0xffff;
6299           /* convert UTF16 to UCS4 */
6300           if
6301             (utf16 >= UTF16HIGHSTART && utf16 <= UTF16HIGHEND) {
6302             ucs4 = (utf16 - UTF16HIGHSTART) << UTF16SHIFT;
6303             continue;
6304           } else if
6305             (utf16 >= UTF16LOSTART && utf16 <= UTF16LOEND) {
6306             ucs4 += utf16 - UTF16LOSTART + UTF16BASE;
6307           } else {
6308             ucs4 = utf16;
6309           }
6310
6311           /* convert UTF-16 range of UCS4 to UTF-8 */
6312           if (ucs4 <= 0x7fUL) {
6313             dst[0] = ucs4;
6314             dst += 1;
6315           } else if (ucs4 <= 0x7ffUL) {
6316             dst[0] = 0xc0 | (ucs4 >> 6);
6317             dst[1] = 0x80 | (ucs4 & 0x3f);
6318             dst += 2;
6319           } else if (ucs4 <= 0xffffUL) {
6320             dst[0] = 0xe0 | (ucs4 >> 12);
6321             dst[1] = 0x80 | ((ucs4 >> 6) & 0x3f);
6322             dst[2] = 0x80 | (ucs4 & 0x3f);
6323             dst += 3;
6324           } else {
6325             dst[0] = 0xf0 | (ucs4 >> 18);
6326             dst[1] = 0x80 | ((ucs4 >> 12) & 0x3f);
6327             dst[2] = 0x80 | ((ucs4 >> 6) & 0x3f);
6328             dst[3] = 0x80 | (ucs4 & 0x3f);
6329             dst += 4;
6330           }
6331         }
6332       }
6333       /* skip over trailing '-' in modified UTF-7 encoding */
6334       if (*src == '-') ++src;
6335     }
6336   }
6337   /* terminate destination string */
6338   *dst = '\0';
6339   return res;
6340 }
6341
6342 /* Convert hex coded UTF-8 string to modified UTF-7 IMAP mailbox
6343  *  dst should be about twice the length of src to deal with non-hex
6344  *  coded URLs
6345  */
6346 char* imap_utf8_to_modified_utf7(const char *src, gboolean change_spaces)
6347 {
6348   unsigned int utf8pos, utf8total, c, utf7mode, bitstogo, utf16flag;
6349   unsigned long ucs4 = 0, bitbuf = 0;
6350
6351   /* initialize hex lookup table */
6352   char *dst, *res;
6353
6354   if (!src) return NULL;
6355
6356   res = malloc(2*strlen(src)+1);
6357   dst = res;
6358   if(!dst) return NULL;
6359
6360   utf7mode = 0;
6361   utf8total = 0;
6362   bitstogo = 0;
6363   utf8pos = 0;
6364   while ((c = (unsigned char)*src) != '\0') {
6365     ++src;
6366     /* normal character? */
6367     if (c >= ' ' && c <= '~' && (c != '_' || !change_spaces)) {
6368       /* switch out of UTF-7 mode */
6369       if (utf7mode) {
6370         if (bitstogo) {
6371           *dst++ = base64chars[(bitbuf << (6 - bitstogo)) & 0x3F];
6372         }
6373         *dst++ = '-';
6374         utf7mode = 0;
6375         utf8pos  = 0;
6376         bitstogo = 0;
6377         utf8total= 0;
6378       }
6379       if (change_spaces && c == ' ')
6380         *dst++ = '_';
6381       else
6382         *dst++ = c;
6383       /* encode '&' as '&-' */
6384       if (c == '&') {
6385         *dst++ = '-';
6386       }
6387       continue;
6388     }
6389     /* switch to UTF-7 mode */
6390     if (!utf7mode) {
6391       *dst++ = '&';
6392       utf7mode = 1;
6393     }
6394     /* Encode US-ASCII characters as themselves */
6395     if (c < 0x80) {
6396       ucs4 = c;
6397     } else if (utf8total) {
6398       /* save UTF8 bits into UCS4 */
6399       ucs4 = (ucs4 << 6) | (c & 0x3FUL);
6400       if (++utf8pos < utf8total) {
6401         continue;
6402       }
6403     } else {
6404       utf8pos = 1;
6405       if (c < 0xE0) {
6406         utf8total = 2;
6407         ucs4 = c & 0x1F;
6408       } else if (c < 0xF0) {
6409         utf8total = 3;
6410         ucs4 = c & 0x0F;
6411       } else {
6412         /* NOTE: can't convert UTF8 sequences longer than 4 */
6413         utf8total = 4;
6414         ucs4 = c & 0x03;
6415       }
6416       continue;
6417     }
6418     /* loop to split ucs4 into two utf16 chars if necessary */
6419     utf8total = 0;
6420     do {
6421       if (ucs4 >= UTF16BASE) {
6422         ucs4 -= UTF16BASE;
6423         bitbuf = (bitbuf << 16) | ((ucs4 >> UTF16SHIFT)
6424                                    + UTF16HIGHSTART);
6425         ucs4 = (ucs4 & UTF16MASK) + UTF16LOSTART;
6426         utf16flag = 1;
6427       } else {
6428         bitbuf = (bitbuf << 16) | ucs4;
6429         utf16flag = 0;
6430       }
6431       bitstogo += 16;
6432       /* spew out base64 */
6433       while (bitstogo >= 6) {
6434         bitstogo -= 6;
6435         *dst++ = base64chars[(bitstogo ? (bitbuf >> bitstogo)
6436                               : bitbuf)
6437                              & 0x3F];
6438       }
6439     } while (utf16flag);
6440   }
6441   /* if in UTF-7 mode, finish in ASCII */
6442   if (utf7mode) {
6443     if (bitstogo) {
6444       *dst++ = base64chars[(bitbuf << (6 - bitstogo)) & 0x3F];
6445     }
6446     *dst++ = '-';
6447   }
6448   /* tie off string */
6449   *dst = '\0';
6450   return res;
6451 }