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