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