src/imap.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2012 Hiroyuki Yamamoto and the Claws Mail team
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #  include "config.h"
  22 #include "claws-features.h"
  23 #endif
  24
  25 #include "defs.h"
  26
  27 #include <glib.h>
  28 #include <glib/gi18n.h>
  29 #include <stdio.h>
  30 #include <string.h>
  31 #include "imap.h"
  32 #include "imap_gtk.h"
  33 #include "inc.h"
  34 #include "xml.h"
  35 #include "alertpanel.h"
  36
  37 #ifdef HAVE_LIBETPAN
  38
  39 #include <stdlib.h>
  40 #include <dirent.h>
  41 #include <unistd.h>
  42 #include <ctype.h>
  43 #include <time.h>
  44 #include <errno.h>
  45 #if HAVE_ICONV
  46 #  include <iconv.h>
  47 #endif
  48
  49 #ifdef USE_GNUTLS
  50 #  include "ssl.h"
  51 #endif
  52
  53 #include "folder.h"
  54 #include "session.h"
  55 #include "procmsg.h"
  56 #include "socket.h"
  57 #include "recv.h"
  58 #include "procheader.h"
  59 #include "prefs_account.h"
  60 #include "codeconv.h"
  61 #include "md5.h"
  62 #include "base64.h"
  63 #include "utils.h"
  64 #include "prefs_common.h"
  65 #include "inputdialog.h"
  66 #include "log.h"
  67 #include "remotefolder.h"
  68 #include "claws.h"
  69 #include "statusbar.h"
  70 #include "msgcache.h"
  71 #include "imap-thread.h"
  72 #include "account.h"
  73 #include "tags.h"
  74 #include "main.h"
  75
  76 typedef struct _IMAPFolder      IMAPFolder;
  77 typedef struct _IMAPSession     IMAPSession;
  78 typedef struct _IMAPNameSpace   IMAPNameSpace;
  79 typedef struct _IMAPFolderItem  IMAPFolderItem;
  80
  81 #include "prefs_account.h"
  82
  83 #define IMAP_FOLDER(obj)        ((IMAPFolder *)obj)
  84 #define IMAP_FOLDER_ITEM(obj)   ((IMAPFolderItem *)obj)
  85 #define IMAP_SESSION(obj)       ((IMAPSession *)obj)
  86
  87 struct _IMAPFolder
  88 {
  89         RemoteFolder rfolder;
  90
  91         /* list of IMAPNameSpace */
  92         GList *ns_personal;
  93         GList *ns_others;
  94         GList *ns_shared;
  95         gchar last_seen_separator;
  96         guint refcnt;
  97         guint max_set_size;
  98 };
  99
 100 struct _IMAPSession
 101 {
 102         Session session;
 103
 104         gboolean authenticated;
 105
 106         GSList *capability;
 107         gboolean uidplus;
 108
 109         gchar *mbox;
 110         guint cmd_count;
 111
 112         /* CLAWS */
 113         gboolean folder_content_changed;
 114         guint exists;
 115         guint recent;
 116         guint expunge;
 117         guint unseen;
 118         guint uid_validity;
 119         guint uid_next;
 120
 121         Folder * folder;
 122         gboolean busy;
 123         gboolean cancelled;
 124         gboolean sens_update_block;
 125 };
 126
 127 struct _IMAPNameSpace
 128 {
 129         gchar *name;
 130         gchar separator;
 131 };
 132
 133 #define IMAPBUFSIZE     8192
 134
 135 #define IMAP_IS_SEEN(flags)     ((flags & IMAP_FLAG_SEEN) != 0)
 136 #define IMAP_IS_ANSWERED(flags) ((flags & IMAP_FLAG_ANSWERED) != 0)
 137 #define IMAP_IS_FLAGGED(flags)  ((flags & IMAP_FLAG_FLAGGED) != 0)
 138 #define IMAP_IS_DELETED(flags)  ((flags & IMAP_FLAG_DELETED) != 0)
 139 #define IMAP_IS_DRAFT(flags)    ((flags & IMAP_FLAG_DRAFT) != 0)
 140 #define IMAP_IS_FORWARDED(flags)        ((flags & IMAP_FLAG_FORWARDED) != 0)
 141 #define IMAP_IS_SPAM(flags)     ((flags & IMAP_FLAG_SPAM) != 0)
 142 #define IMAP_IS_HAM(flags)      ((flags & IMAP_FLAG_HAM) != 0)
 143
 144
 145 #define IMAP4_PORT      143
 146 #ifdef USE_GNUTLS
 147 #define IMAPS_PORT      993
 148 #endif
 149
 150 #define IMAP_CMD_LIMIT  1000
 151
 152 enum {
 153         ITEM_CAN_CREATE_FLAGS_UNKNOWN = 0,
 154         ITEM_CAN_CREATE_FLAGS,
 155         ITEM_CANNOT_CREATE_FLAGS
 156 };
 157
 158 struct _IMAPFolderItem
 159 {
 160         FolderItem item;
 161
 162         guint lastuid;
 163         guint uid_next;
 164         GSList *uid_list;
 165         gboolean batching;
 166
 167         GHashTable *flags_set_table;
 168         GHashTable *flags_unset_table;
 169         guint32 last_change;
 170         guint32 last_sync;
 171         gboolean should_update;
 172         gboolean should_trash_cache;
 173         gint can_create_flags;
 174
 175         GHashTable *tags_set_table;
 176         GHashTable *tags_unset_table;
 177         GSList *ok_flags;
 178
 179 };
 180
 181 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item);
 182 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag);
 183
 184 static void imap_folder_init            (Folder         *folder,
 185                                          const gchar    *name,
 186                                          const gchar    *path);
 187
 188 static Folder   *imap_folder_new        (const gchar    *name,
 189                                          const gchar    *path);
 190 static void      imap_folder_destroy    (Folder         *folder);
 191
 192 static IMAPSession *imap_session_new    (Folder         *folder,
 193                                          const PrefsAccount     *account);
 194 static gint     imap_session_authenticate(IMAPSession   *session,
 195                                           PrefsAccount  *account);
 196 static void     imap_session_destroy    (Session        *session);
 197
 198 static gchar   *imap_fetch_msg          (Folder         *folder,
 199                                          FolderItem     *item,
 200                                          gint            uid);
 201 static gchar   *imap_fetch_msg_full     (Folder         *folder,
 202                                          FolderItem     *item,
 203                                          gint            uid,
 204                                          gboolean        headers,
 205                                          gboolean        body);
 206 static void     imap_remove_cached_msg  (Folder         *folder,
 207                                          FolderItem     *item,
 208                                          MsgInfo        *msginfo);
 209 static gint     imap_add_msg            (Folder         *folder,
 210                                          FolderItem     *dest,
 211                                          const gchar    *file,
 212                                          MsgFlags       *flags);
 213 static gint     imap_add_msgs           (Folder         *folder,
 214                                          FolderItem     *dest,
 215                                          GSList         *file_list,
 216                                          GHashTable     *relation);
 217
 218 static gint     imap_copy_msg           (Folder         *folder,
 219                                          FolderItem     *dest,
 220                                          MsgInfo        *msginfo);
 221 static gint     imap_copy_msgs          (Folder         *folder,
 222                                          FolderItem     *dest,
 223                                          MsgInfoList    *msglist,
 224                                          GHashTable     *relation);
 225
 226 static gint     search_msgs             (Folder                 *folder,
 227                                          FolderItem             *container,
 228                                          MsgNumberList          **msgs,
 229                                          gboolean               *on_server,
 230                                          MatcherList            *predicate,
 231                                          SearchProgressNotify   progress_cb,
 232                                          gpointer               progress_data);
 233
 234 static gint     imap_remove_msg         (Folder         *folder,
 235                                          FolderItem     *item,
 236                                          gint            uid);
 237 static gint     imap_remove_msgs        (Folder         *folder,
 238                                          FolderItem     *dest,
 239                                          MsgInfoList    *msglist,
 240                                          GHashTable     *relation);
 241 static gint     imap_expunge            (Folder         *folder,
 242                                          FolderItem     *dest);
 243 static gint     imap_remove_all_msg     (Folder         *folder,
 244                                          FolderItem     *item);
 245
 246 static gboolean imap_is_msg_changed     (Folder         *folder,
 247                                          FolderItem     *item,
 248                                          MsgInfo        *msginfo);
 249
 250 static gint     imap_close              (Folder         *folder,
 251                                          FolderItem     *item);
 252
 253 static gint     imap_scan_tree          (Folder         *folder);
 254
 255 static gint     imap_create_tree        (Folder         *folder);
 256
 257 static FolderItem *imap_create_folder   (Folder         *folder,
 258                                          FolderItem     *parent,
 259                                          const gchar    *name);
 260 static gint     imap_rename_folder      (Folder         *folder,
 261                                          FolderItem     *item,
 262                                          const gchar    *name);
 263 static gint     imap_remove_folder      (Folder         *folder,
 264                                          FolderItem     *item);
 265
 266 static FolderItem *imap_folder_item_new (Folder         *folder);
 267 static void imap_folder_item_destroy    (Folder         *folder,
 268                                          FolderItem     *item);
 269
 270 static IMAPSession *imap_session_get    (Folder         *folder);
 271
 272 static gint imap_auth                   (IMAPSession    *session,
 273                                          const gchar    *user,
 274                                          const gchar    *pass,
 275                                          IMAPAuthType    type);
 276
 277 static gint imap_scan_tree_recursive    (IMAPSession    *session,
 278                                          FolderItem     *item,
 279                                          gboolean        subs_only);
 280
 281 static void imap_create_missing_folders (Folder         *folder);
 282 static FolderItem *imap_create_special_folder
 283                                         (Folder                 *folder,
 284                                          SpecialFolderItemType   stype,
 285                                          const gchar            *name);
 286
 287 static gint imap_do_copy_msgs           (Folder         *folder,
 288                                          FolderItem     *dest,
 289                                          MsgInfoList    *msglist,
 290                                          GHashTable     *relation);
 291
 292 static void imap_delete_all_cached_messages     (FolderItem     *item);
 293 static void imap_set_batch              (Folder         *folder,
 294                                          FolderItem     *item,
 295                                          gboolean        batch);
 296 static gint imap_set_message_flags      (IMAPSession    *session,
 297                                          IMAPFolderItem *item,
 298                                          MsgNumberList  *numlist,
 299                                          IMAPFlags       flags,
 300                                          GSList         *tags,
 301                                          gboolean        is_set);
 302 static gint imap_select                 (IMAPSession    *session,
 303                                          IMAPFolder     *folder,
 304                                          FolderItem     *item,
 305                                          gint           *exists,
 306                                          gint           *recent,
 307                                          gint           *unseen,
 308                                          guint32        *uid_validity,
 309                                          gint           *can_create_flags,
 310                                          gboolean        block);
 311 static gint imap_status                 (IMAPSession    *session,
 312                                          IMAPFolder     *folder,
 313                                          const gchar    *path,
 314                                          IMAPFolderItem *item,
 315                                          gint           *messages,
 316                                          guint32        *uid_next,
 317                                          guint32        *uid_validity,
 318                                          gint           *unseen,
 319                                          gboolean        block);
 320 static void     imap_commit_tags        (FolderItem     *item,
 321                                          MsgInfo        *msginfo,
 322                                          GSList         *set_tags,
 323                                          GSList         *unset_tags);
 324
 325 static gchar imap_get_path_separator            (IMAPSession    *session,
 326                                                  IMAPFolder     *folder,
 327                                                  const gchar    *path,
 328                                                  gint           *ok);
 329 static gchar *imap_get_real_path                (IMAPSession    *session,
 330                                                  IMAPFolder     *folder,
 331                                                  const gchar    *path,
 332                                                  gint           *ok);
 333 #ifdef HAVE_LIBETPAN
 334 static void imap_synchronise            (FolderItem     *item, gint days);
 335 #endif
 336 static gboolean imap_is_busy            (Folder *folder);
 337
 338 static void imap_free_capabilities      (IMAPSession    *session);
 339
 340 /* low-level IMAP4rev1 commands */
 341 static gint imap_cmd_login      (IMAPSession    *session,
 342                                  const gchar    *user,
 343                                  const gchar    *pass,
 344                                  const gchar    *type);
 345 static gint imap_cmd_noop       (IMAPSession    *session);
 346 #ifdef USE_GNUTLS
 347 static gint imap_cmd_starttls   (IMAPSession    *session);
 348 #endif
 349 static gint imap_cmd_select     (IMAPSession    *session,
 350                                  const gchar    *folder,
 351                                  gint           *exists,
 352                                  gint           *recent,
 353                                  gint           *unseen,
 354                                  guint32        *uid_validity,
 355                                  gint           *can_create_flags,
 356                                  GSList         **ok_flags,
 357                                  gboolean        block);
 358 static gint imap_cmd_close      (IMAPSession    *session);
 359 static gint imap_cmd_examine    (IMAPSession    *session,
 360                                  const gchar    *folder,
 361                                  gint           *exists,
 362                                  gint           *recent,
 363                                  gint           *unseen,
 364                                  guint32        *uid_validity,
 365                                  gboolean        block);
 366 static gint imap_cmd_create     (IMAPSession    *sock,
 367                                  const gchar    *folder);
 368 static gint imap_cmd_rename     (IMAPSession    *sock,
 369                                  const gchar    *oldfolder,
 370                                  const gchar    *newfolder);
 371 static gint imap_cmd_delete     (IMAPSession    *session,
 372                                  const gchar    *folder);
 373 static gint imap_cmd_fetch      (IMAPSession    *sock,
 374                                  guint32         uid,
 375                                  const gchar    *filename,
 376                                  gboolean        headers,
 377                                  gboolean        body);
 378 static gint imap_cmd_append     (IMAPSession    *session,
 379                                  IMAPFolderItem *item,
 380                                  const gchar    *destfolder,
 381                                  const gchar    *file,
 382                                  IMAPFlags       flags,
 383                                  guint32        *new_uid);
 384 static gint imap_cmd_copy       (IMAPSession *session,
 385                                  struct mailimap_set * set,
 386                                  const gchar *destfolder,
 387                                  struct mailimap_set ** source,
 388                                  struct mailimap_set ** dest);
 389 static gint imap_cmd_store      (IMAPSession    *session,
 390                                  IMAPFolderItem *item,
 391                                  struct mailimap_set * set,
 392                                  IMAPFlags flags,
 393                                  GSList *tags,
 394                                  int do_add);
 395 static gint imap_cmd_expunge    (IMAPSession    *session, gboolean force);
 396
 397 static void imap_path_separator_subst           (gchar          *str,
 398                                                  gchar           separator);
 399
 400 static gboolean imap_rename_folder_func         (GNode          *node,
 401                                                  gpointer        data);
 402 static gint imap_get_num_list                   (Folder         *folder,
 403                                                  FolderItem     *item,
 404                                                  GSList        **list,
 405                                                  gboolean       *old_uids_valid);
 406 static GSList *imap_get_msginfos                (Folder         *folder,
 407                                                  FolderItem     *item,
 408                                                  GSList         *msgnum_list);
 409 static MsgInfo *imap_get_msginfo                (Folder         *folder,
 410                                                  FolderItem     *item,
 411                                                  gint            num);
 412 static gboolean imap_scan_required              (Folder         *folder,
 413                                                  FolderItem     *item);
 414 static void imap_change_flags                   (Folder         *folder,
 415                                                  FolderItem     *item,
 416                                                  MsgInfo        *msginfo,
 417                                                  MsgPermFlags    newflags);
 418 static gint imap_get_flags                      (Folder         *folder,
 419                                                  FolderItem     *item,
 420                                                  MsgInfoList    *msglist,
 421                                                  GHashTable     *msgflags);
 422 static gchar *imap_folder_get_path              (Folder         *folder);
 423 static gchar *imap_item_get_path                (Folder         *folder,
 424                                                  FolderItem     *item);
 425 static MsgInfo *imap_parse_msg(const gchar *file, FolderItem *item);
 426
 427
 428 /* data types conversion libetpan <-> claws */
 429 static GSList * imap_list_from_lep(IMAPFolder * folder,
 430                                    clist * list, const gchar * real_path, gboolean all);
 431 static GSList * imap_get_lep_set_from_numlist(IMAPFolder *folder, MsgNumberList *numlist);
 432 static GSList * imap_get_lep_set_from_msglist(IMAPFolder *folder, MsgInfoList *msglist);
 433 static GSList * imap_uid_list_from_lep(clist * list, gint* length);
 434 static GSList * imap_uid_list_from_lep_tab(carray * list);
 435 static void imap_flags_hash_from_lep_uid_flags_tab(carray * list,
 436                                                    GHashTable * hash,
 437                                                    GHashTable *tags_hash);
 438 static MsgInfo *imap_envelope_from_lep(struct imap_fetch_env_info * info,
 439                                        FolderItem *item);
 440 static void imap_lep_set_free(GSList *seq_list);
 441 static struct mailimap_flag_list * imap_flag_to_lep(IMAPFolderItem *item, IMAPFlags flags, GSList *tags);
 442
 443 typedef struct _hashtable_data {
 444         GSList *msglist;
 445         IMAPFolderItem *item;
 446 } hashtable_data;
 447
 448 static FolderClass imap_class;
 449
 450 FolderClass *imap_get_class(void)
 451 {
 452         if (imap_class.idstr == NULL) {
 453                 imap_class.type = F_IMAP;
 454                 imap_class.idstr = "imap";
 455                 imap_class.uistr = "IMAP4";
 456                 imap_class.supports_server_search = TRUE;
 457
 458                 /* Folder functions */
 459                 imap_class.new_folder = imap_folder_new;
 460                 imap_class.destroy_folder = imap_folder_destroy;
 461                 imap_class.scan_tree = imap_scan_tree;
 462                 imap_class.create_tree = imap_create_tree;
 463
 464                 /* FolderItem functions */
 465                 imap_class.item_new = imap_folder_item_new;
 466                 imap_class.item_destroy = imap_folder_item_destroy;
 467                 imap_class.item_get_path = imap_item_get_path;
 468                 imap_class.create_folder = imap_create_folder;
 469                 imap_class.rename_folder = imap_rename_folder;
 470                 imap_class.remove_folder = imap_remove_folder;
 471                 imap_class.close = imap_close;
 472                 imap_class.get_num_list = imap_get_num_list;
 473                 imap_class.scan_required = imap_scan_required;
 474                 imap_class.set_xml = folder_set_xml;
 475                 imap_class.get_xml = folder_get_xml;
 476                 imap_class.item_set_xml = imap_item_set_xml;
 477                 imap_class.item_get_xml = imap_item_get_xml;
 478
 479                 /* Message functions */
 480                 imap_class.get_msginfo = imap_get_msginfo;
 481                 imap_class.get_msginfos = imap_get_msginfos;
 482                 imap_class.fetch_msg = imap_fetch_msg;
 483                 imap_class.fetch_msg_full = imap_fetch_msg_full;
 484                 imap_class.add_msg = imap_add_msg;
 485                 imap_class.add_msgs = imap_add_msgs;
 486                 imap_class.copy_msg = imap_copy_msg;
 487                 imap_class.copy_msgs = imap_copy_msgs;
 488                 imap_class.search_msgs = search_msgs;
 489                 imap_class.remove_msg = imap_remove_msg;
 490                 imap_class.remove_msgs = imap_remove_msgs;
 491                 imap_class.expunge = imap_expunge;
 492                 imap_class.remove_all_msg = imap_remove_all_msg;
 493                 imap_class.is_msg_changed = imap_is_msg_changed;
 494                 imap_class.change_flags = imap_change_flags;
 495                 imap_class.get_flags = imap_get_flags;
 496                 imap_class.set_batch = imap_set_batch;
 497                 imap_class.synchronise = imap_synchronise;
 498                 imap_class.remove_cached_msg = imap_remove_cached_msg;
 499                 imap_class.commit_tags = imap_commit_tags;
 500 #ifdef USE_PTREAD
 501                 pthread_mutex_init(&imap_mutex, NULL);
 502 #endif
 503         }
 504
 505         return &imap_class;
 506 }
 507
 508 static void imap_refresh_sensitivity (IMAPSession *session)
 509 {
 510         MainWindow *mainwin;
 511
 512         if (session->sens_update_block)
 513                 return;
 514         mainwin = mainwindow_get_mainwindow();
 515         if (mainwin) {
 516                 toolbar_main_set_sensitive(mainwin);
 517                 main_window_set_menu_sensitive(mainwin);
 518         }
 519 }
 520
 521 static void lock_session(IMAPSession *session)
 522 {
 523         if (session) {
 524                 debug_print("locking session %p (%d)\n", session, session->busy);
 525                 if (session->busy)
 526                         debug_print("         SESSION WAS LOCKED !!      \n");
 527                 session->busy = TRUE;
 528                 imap_refresh_sensitivity(session);
 529         } else {
 530                 debug_print("can't lock null session\n");
 531         }
 532 }
 533
 534 static void unlock_session(IMAPSession *session)
 535 {
 536         if (session) {
 537                 debug_print("unlocking session %p\n", session);
 538                 session->busy = FALSE;
 539                 imap_refresh_sensitivity(session);
 540         } else {
 541                 debug_print("can't unlock null session\n");
 542         }
 543 }
 544
 545 static void imap_disc_session_destroy(IMAPSession *session)
 546 {
 547         RemoteFolder *rfolder = NULL;
 548
 549         if (session == NULL)
 550                 return;
 551
 552         rfolder = REMOTE_FOLDER(IMAP_SESSION(session)->folder);
 553
 554         if (rfolder == NULL)
 555                 return;
 556         log_warning(LOG_PROTOCOL, _("IMAP4 connection broken\n"));
 557         SESSION(session)->state = SESSION_DISCONNECTED;
 558         SESSION(session)->sock = NULL;
 559 }
 560
 561 static gboolean is_fatal(int libetpan_errcode)
 562 {
 563         switch(libetpan_errcode) {
 564         case MAILIMAP_ERROR_STREAM:
 565         case MAILIMAP_ERROR_PROTOCOL:
 566         case MAILIMAP_ERROR_PARSE:
 567         case MAILIMAP_ERROR_BAD_STATE:
 568                 return TRUE;
 569         default:
 570                 return FALSE;
 571         }
 572 }
 573
 574 static void imap_handle_error(Session *session, const gchar *server, int libetpan_errcode)
 575 {
 576         const gchar *session_server = (session ? session->server : NULL);
 577
 578         if (session_server == NULL)
 579                 session_server = server;
 580         if (session_server == NULL)
 581                 session_server = "(null)";
 582
 583         switch(libetpan_errcode) {
 584         case MAILIMAP_NO_ERROR:
 585                 return;
 586         case MAILIMAP_NO_ERROR_AUTHENTICATED:
 587                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: authenticated\n"), session_server);
 588                 break;
 589         case MAILIMAP_NO_ERROR_NON_AUTHENTICATED:
 590                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: not authenticated\n"), session_server);
 591                 break;
 592         case MAILIMAP_ERROR_BAD_STATE:
 593                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: bad state\n"), session_server);
 594                 break;
 595         case MAILIMAP_ERROR_STREAM:
 596                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: stream error\n"), session_server);
 597                 break;
 598         case MAILIMAP_ERROR_PARSE:
 599                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: parse error "
 600                                             "(very probably non-RFC compliance from the server)\n"), session_server);
 601                 break;
 602         case MAILIMAP_ERROR_CONNECTION_REFUSED:
 603                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: connection refused\n"), session_server);
 604                 break;
 605         case MAILIMAP_ERROR_MEMORY:
 606                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: memory error\n"), session_server);
 607                 break;
 608         case MAILIMAP_ERROR_FATAL:
 609                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: fatal error\n"), session_server);
 610                 break;
 611         case MAILIMAP_ERROR_PROTOCOL:
 612                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: protocol error"
 613                                             "(very probably non-RFC compliance from the server)\n"), session_server);
 614                 break;
 615         case MAILIMAP_ERROR_DONT_ACCEPT_CONNECTION:
 616                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: connection not accepted\n"), session_server);
 617                 break;
 618         case MAILIMAP_ERROR_APPEND:
 619                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: APPEND error\n"), session_server);
 620                 break;
 621         case MAILIMAP_ERROR_NOOP:
 622                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: NOOP error\n"), session_server);
 623                 break;
 624         case MAILIMAP_ERROR_LOGOUT:
 625                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: LOGOUT error\n"), session_server);
 626                 break;
 627         case MAILIMAP_ERROR_CAPABILITY:
 628                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: CAPABILITY error\n"), session_server);
 629                 break;
 630         case MAILIMAP_ERROR_CHECK:
 631                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: CHECK error\n"), session_server);
 632                 break;
 633         case MAILIMAP_ERROR_CLOSE:
 634                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: CLOSE error\n"), session_server);
 635                 break;
 636         case MAILIMAP_ERROR_EXPUNGE:
 637                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: EXPUNGE error\n"), session_server);
 638                 break;
 639         case MAILIMAP_ERROR_COPY:
 640                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: COPY error\n"), session_server);
 641                 break;
 642         case MAILIMAP_ERROR_UID_COPY:
 643                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: UID COPY error\n"), session_server);
 644                 break;
 645         case MAILIMAP_ERROR_CREATE:
 646                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: CREATE error\n"), session_server);
 647                 break;
 648         case MAILIMAP_ERROR_DELETE:
 649                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: DELETE error\n"), session_server);
 650                 break;
 651         case MAILIMAP_ERROR_EXAMINE:
 652                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: EXAMINE error\n"), session_server);
 653                 break;
 654         case MAILIMAP_ERROR_FETCH:
 655                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: FETCH error\n"), session_server);
 656                 break;
 657         case MAILIMAP_ERROR_UID_FETCH:
 658                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: UID FETCH error\n"), session_server);
 659                 break;
 660         case MAILIMAP_ERROR_LIST:
 661                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: LIST error\n"), session_server);
 662                 break;
 663         case MAILIMAP_ERROR_LOGIN:
 664                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: LOGIN error\n"), session_server);
 665                 break;
 666         case MAILIMAP_ERROR_LSUB:
 667                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: LSUB error\n"), session_server);
 668                 break;
 669         case MAILIMAP_ERROR_RENAME:
 670                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: RENAME error\n"), session_server);
 671                 break;
 672         case MAILIMAP_ERROR_SEARCH:
 673                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: SEARCH error\n"), session_server);
 674                 break;
 675         case MAILIMAP_ERROR_UID_SEARCH:
 676                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: UID SEARCH error\n"), session_server);
 677                 break;
 678         case MAILIMAP_ERROR_SELECT:
 679                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: SELECT error\n"), session_server);
 680                 break;
 681         case MAILIMAP_ERROR_STATUS:
 682                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: STATUS error\n"), session_server);
 683                 break;
 684         case MAILIMAP_ERROR_STORE:
 685                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: STORE error\n"), session_server);
 686                 break;
 687         case MAILIMAP_ERROR_UID_STORE:
 688                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: UID STORE error\n"), session_server);
 689                 break;
 690         case MAILIMAP_ERROR_SUBSCRIBE:
 691                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: SUBSCRIBE error\n"), session_server);
 692                 break;
 693         case MAILIMAP_ERROR_UNSUBSCRIBE:
 694                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: UNSUBSCRIBE error\n"), session_server);
 695                 break;
 696         case MAILIMAP_ERROR_STARTTLS:
 697                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: STARTTLS error\n"), session_server);
 698                 break;
 699         case MAILIMAP_ERROR_INVAL:
 700                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: INVAL error\n"), session_server);
 701                 break;
 702         case MAILIMAP_ERROR_EXTENSION:
 703                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: EXTENSION error\n"), session_server);
 704                 break;
 705         case MAILIMAP_ERROR_SASL:
 706                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: SASL error\n"), session_server);
 707                 break;
 708 #ifdef USE_GNUTLS
 709         case MAILIMAP_ERROR_SSL:
 710                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: SSL error\n"), session_server);
 711                 break;
 712 #endif
 713         default:
 714                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: Unknown error [%d]\n"),
 715                         session_server, libetpan_errcode);
 716                 break;
 717         }
 718
 719         if (session && is_fatal(libetpan_errcode)) {
 720                 imap_disc_session_destroy(IMAP_SESSION(session));
 721         } else if (session && !is_fatal(libetpan_errcode)) {
 722                 if (IMAP_SESSION(session)->busy)
 723                         unlock_session(IMAP_SESSION(session));
 724         }
 725 }
 726
 727 static Folder *imap_folder_new(const gchar *name, const gchar *path)
 728 {
 729         Folder *folder;
 730
 731         folder = (Folder *)g_new0(IMAPFolder, 1);
 732         folder->klass = &imap_class;
 733         imap_folder_init(folder, name, path);
 734
 735         return folder;
 736 }
 737
 738 static void imap_folder_destroy(Folder *folder)
 739 {
 740         while (imap_folder_get_refcnt(folder) > 0)
 741                 gtk_main_iteration();
 742
 743         folder_remote_folder_destroy(REMOTE_FOLDER(folder));
 744         imap_done(folder);
 745 }
 746
 747 static void imap_folder_init(Folder *folder, const gchar *name,
 748                              const gchar *path)
 749 {
 750         folder_remote_folder_init((Folder *)folder, name, path);
 751         IMAP_FOLDER(folder)->max_set_size = IMAP_SET_MAX_COUNT;
 752 }
 753
 754 static FolderItem *imap_folder_item_new(Folder *folder)
 755 {
 756         IMAPFolderItem *item;
 757
 758         item = g_new0(IMAPFolderItem, 1);
 759         item->lastuid = 0;
 760         item->uid_next = 0;
 761         item->uid_list = NULL;
 762
 763         return (FolderItem *)item;
 764 }
 765
 766 static void imap_folder_item_destroy(Folder *folder, FolderItem *_item)
 767 {
 768         IMAPFolderItem *item = (IMAPFolderItem *)_item;
 769
 770         g_return_if_fail(item != NULL);
 771         g_slist_free(item->uid_list);
 772
 773         g_free(_item);
 774 }
 775
 776 static gboolean imap_reset_uid_lists_func(GNode *node, gpointer data)
 777 {
 778         IMAPFolderItem *item = (IMAPFolderItem *)node->data;
 779
 780         item->lastuid = 0;
 781         g_slist_free(item->uid_list);
 782         item->uid_list = NULL;
 783
 784         return FALSE;
 785 }
 786
 787 static void imap_reset_uid_lists(Folder *folder)
 788 {
 789         if(folder->node == NULL)
 790                 return;
 791
 792         /* Destroy all uid lists and rest last uid */
 793         g_node_traverse(folder->node, G_IN_ORDER, G_TRAVERSE_ALL, -1, imap_reset_uid_lists_func, NULL);
 794 }
 795
 796 static int imap_get_capabilities(IMAPSession *session)
 797 {
 798         struct mailimap_capability_data *capabilities = NULL;
 799         clistiter *cur;
 800         int result = -1;
 801
 802         if (session->capability != NULL)
 803                 return MAILIMAP_NO_ERROR;
 804
 805         capabilities = imap_threaded_capability(session->folder, &result);
 806
 807         if (result != MAILIMAP_NO_ERROR) {
 808                 return result;
 809         }
 810
 811         if (capabilities == NULL || capabilities->cap_list == NULL) {
 812                 return MAILIMAP_NO_ERROR;
 813         }
 814
 815         for(cur = clist_begin(capabilities->cap_list) ; cur != NULL ;
 816             cur = clist_next(cur)) {
 817                 struct mailimap_capability * cap =
 818                         clist_content(cur);
 819                 if (!cap || cap->cap_data.cap_name == NULL)
 820                         continue;
 821                 session->capability = g_slist_append
 822                                 (session->capability,
 823                                  g_strdup(cap->cap_data.cap_name));
 824                 debug_print("got capa %s\n", cap->cap_data.cap_name);
 825         }
 826         mailimap_capability_data_free(capabilities);
 827         return MAILIMAP_NO_ERROR;
 828 }
 829
 830 static gboolean imap_has_capability(IMAPSession *session, const gchar *cap)
 831 {
 832         GSList *cur;
 833         for (cur = session->capability; cur; cur = cur->next) {
 834                 if (!g_ascii_strcasecmp(cur->data, cap))
 835                         return TRUE;
 836         }
 837         return FALSE;
 838 }
 839
 840 static gint imap_auth(IMAPSession *session, const gchar *user, const gchar *pass,
 841                       IMAPAuthType type)
 842 {
 843         gint ok = MAILIMAP_ERROR_LOGIN;
 844         static time_t last_login_err = 0;
 845         gchar *ext_info = "";
 846         int r;
 847         gchar *server = NULL;
 848         if ((r = imap_get_capabilities(session)) != MAILIMAP_NO_ERROR) {
 849                 imap_handle_error(SESSION(session), NULL, r);
 850                 return r;
 851         }
 852         server = g_strdup(SESSION(session)->server);
 853         switch(type) {
 854         case IMAP_AUTH_ANON:
 855                 ok = imap_cmd_login(session, user, pass, "ANONYMOUS");
 856                 break;
 857         case IMAP_AUTH_CRAM_MD5:
 858                 ok = imap_cmd_login(session, user, pass, "CRAM-MD5");
 859                 break;
 860         case IMAP_AUTH_DIGEST_MD5:
 861                 ok = imap_cmd_login(session, user, pass, "DIGEST-MD5");
 862                 break;
 863         case IMAP_AUTH_LOGIN:
 864                 ok = imap_cmd_login(session, user, pass, "LOGIN");
 865                 break;
 866         case IMAP_AUTH_GSSAPI:
 867                 ok = imap_cmd_login(session, user, pass, "GSSAPI");
 868                 break;
 869         default:
 870                 debug_print("capabilities:\n"
 871                                 "\t ANONYMOUS %d\n"
 872                                 "\t CRAM-MD5 %d\n"
 873                                 "\t DIGEST-MD5 %d\n"
 874                                 "\t LOGIN %d\n"
 875                                 "\t GSSAPI %d\n",
 876                         imap_has_capability(session, "ANONYMOUS"),
 877                         imap_has_capability(session, "CRAM-MD5"),
 878                         imap_has_capability(session, "DIGEST-MD5"),
 879                         imap_has_capability(session, "LOGIN"),
 880                         imap_has_capability(session, "GSSAPI"));
 881                 if (imap_has_capability(session, "CRAM-MD5"))
 882                         ok = imap_cmd_login(session, user, pass, "CRAM-MD5");
 883                 if (ok == MAILIMAP_ERROR_LOGIN && imap_has_capability(session, "DIGEST-MD5"))
 884                         ok = imap_cmd_login(session, user, pass, "DIGEST-MD5");
 885                 if (ok == MAILIMAP_ERROR_LOGIN && imap_has_capability(session, "GSSAPI"))
 886                         ok = imap_cmd_login(session, user, pass, "GSSAPI");
 887                 if (ok == MAILIMAP_ERROR_LOGIN) /* we always try LOGIN before giving up */
 888                         ok = imap_cmd_login(session, user, pass, "LOGIN");
 889         }
 890
 891         if (ok == MAILIMAP_NO_ERROR)
 892                 session->authenticated = TRUE;
 893         else {
 894                 if (type == IMAP_AUTH_CRAM_MD5) {
 895                         ext_info = _("\n\nCRAM-MD5 logins only work if libetpan has been "
 896                                      "compiled with SASL support and the "
 897                                      "CRAM-MD5 SASL plugin is installed.");
 898                 }
 899
 900                 if (type == IMAP_AUTH_DIGEST_MD5) {
 901                         ext_info = _("\n\nDIGEST-MD5 logins only work if libetpan has been "
 902                                      "compiled with SASL support and the "
 903                                      "DIGEST-MD5 SASL plugin is installed.");
 904                 }
 905
 906                 if (time(NULL) - last_login_err > 10) {
 907                         if (!prefs_common.no_recv_err_panel) {
 908                                 alertpanel_error_log(_("Connection to %s failed: "
 909                                         "login refused.%s"),
 910                                         server, ext_info);
 911                         } else {
 912                                 log_error(LOG_PROTOCOL, _("Connection to %s failed: "
 913                                         "login refused.%s\n"),
 914                                         server, ext_info);
 915                         }
 916                 }
 917                 last_login_err = time(NULL);
 918         }
 919         g_free(server);
 920         return ok;
 921 }
 922
 923 static IMAPSession *imap_reconnect_if_possible(Folder *folder, IMAPSession *session)
 924 {
 925         RemoteFolder *rfolder = REMOTE_FOLDER(folder);
 926         /* Check if this is the first try to establish a
 927            connection, if yes we don't try to reconnect */
 928         debug_print("reconnecting\n");
 929         if (rfolder->session == NULL) {
 930                 log_warning(LOG_PROTOCOL, _("Connecting to %s failed"),
 931                             folder->account->recv_server);
 932                 SESSION(session)->sock = NULL;
 933                 session_destroy(SESSION(session));
 934                 session = NULL;
 935         } else {
 936                 rfolder->session = NULL;
 937                 log_warning(LOG_PROTOCOL, _("IMAP4 connection to %s has been"
 938                             " disconnected. Reconnecting...\n"),
 939                             folder->account->recv_server);
 940                 statusbar_print_all(_("IMAP4 connection to %s has been"
 941                             " disconnected. Reconnecting...\n"),
 942                             folder->account->recv_server);
 943                 SESSION(session)->state = SESSION_DISCONNECTED;
 944                 SESSION(session)->sock = NULL;
 945                 session_destroy(SESSION(session));
 946                 /* Clear folders session to make imap_session_get create
 947                    a new session, because of rfolder->session == NULL
 948                    it will not try to reconnect again and so avoid an
 949                    endless loop */
 950                 debug_print("getting session...\n");
 951                 session = imap_session_get(folder);
 952                 rfolder->session = SESSION(session);
 953                 statusbar_pop_all();
 954         }
 955         return session;
 956 }
 957
 958 static IMAPSession *imap_session_get(Folder *folder)
 959 {
 960         RemoteFolder *rfolder = REMOTE_FOLDER(folder);
 961         IMAPSession *session = NULL;
 962         gint r = MAILIMAP_NO_ERROR;
 963
 964         g_return_val_if_fail(folder != NULL, NULL);
 965         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, NULL);
 966         g_return_val_if_fail(folder->account != NULL, NULL);
 967
 968         if (prefs_common.work_offline &&
 969             !inc_offline_should_override(FALSE,
 970                 _("Claws Mail needs network access in order "
 971                   "to access the IMAP server."))) {
 972                 return NULL;
 973         }
 974
 975         /* Make sure we have a session */
 976         if (rfolder->session != NULL && rfolder->session->state != SESSION_DISCONNECTED) {
 977                 session = IMAP_SESSION(rfolder->session);
 978         } else if (rfolder->session != NULL && rfolder->session->state == SESSION_DISCONNECTED) {
 979                 session_destroy(SESSION(rfolder->session));
 980                 rfolder->session = NULL;
 981                 goto new_conn;
 982         } else if (rfolder->connecting) {
 983                 debug_print("already connecting\n");
 984                 return NULL;
 985         } else {
 986 new_conn:
 987                 imap_reset_uid_lists(folder);
 988                 if (time(NULL) - rfolder->last_failure <= 2)
 989                         return NULL;
 990                 rfolder->connecting = TRUE;
 991                 session = imap_session_new(folder, folder->account);
 992         }
 993         if(session == NULL) {
 994                 rfolder->last_failure = time(NULL);
 995                 rfolder->connecting = FALSE;
 996                 return NULL;
 997         }
 998
 999         /* Make sure session is authenticated */
1000         if (!IMAP_SESSION(session)->authenticated)
1001                 r = imap_session_authenticate(IMAP_SESSION(session), folder->account);
1002
1003         if (r != MAILIMAP_NO_ERROR || (!is_fatal(r) && !IMAP_SESSION(session)->authenticated)) {
1004                 rfolder->session = NULL;
1005                 if (!is_fatal(r)) {
1006                         imap_threaded_disconnect(session->folder);
1007                         SESSION(session)->state = SESSION_DISCONNECTED;
1008                         SESSION(session)->sock = NULL;
1009                         session_destroy(SESSION(session));
1010                 }
1011                 rfolder->last_failure = time(NULL);
1012                 rfolder->connecting = FALSE;
1013                 return NULL;
1014         }
1015
1016         /* I think the point of this code is to avoid sending a
1017          * keepalive if we've used the session recently and therefore
1018          * think it's still alive.  Unfortunately, most of the code
1019          * does not yet check for errors on the socket, and so if the
1020          * connection drops we don't notice until the timeout expires.
1021          * A better solution than sending a NOOP every time would be
1022          * for every command to be prepared to retry until it is
1023          * successfully sent. -- mbp */
1024         if ((time(NULL) - SESSION(session)->last_access_time > SESSION_TIMEOUT_INTERVAL) || session->cancelled) {
1025                 /* verify that the session is still alive */
1026                 if ((r = imap_cmd_noop(session)) != MAILIMAP_NO_ERROR) {
1027                         debug_print("disconnected!\n");
1028                         if (!is_fatal(r))
1029                                 session = imap_reconnect_if_possible(folder, session);
1030                         else {
1031                                 rfolder->session = NULL;
1032                                 rfolder->connecting = FALSE;
1033                                 session = imap_session_get(folder);
1034                         }
1035                 }
1036                 if (session)
1037                         session->cancelled = FALSE;
1038         }
1039
1040         rfolder->session = SESSION(session);
1041         rfolder->connecting = FALSE;
1042
1043         return IMAP_SESSION(session);
1044 }
1045
1046 static IMAPSession *imap_session_new(Folder * folder,
1047                                      const PrefsAccount *account)
1048 {
1049         IMAPSession *session;
1050         gushort port;
1051         int r;
1052         int authenticated = FALSE;
1053         gchar *buf;
1054
1055 #ifdef USE_GNUTLS
1056         /* FIXME: IMAP over SSL only... */
1057         SSLType ssl_type;
1058
1059         port = account->set_imapport ? account->imapport
1060                 : account->ssl_imap == SSL_TUNNEL ? IMAPS_PORT : IMAP4_PORT;
1061         ssl_type = account->ssl_imap;
1062 #else
1063         if (account->ssl_imap != SSL_NONE) {
1064                 if (alertpanel_full(_("Insecure connection"),
1065                         _("This connection is configured to be secured "
1066                           "using SSL, but SSL is not available in this "
1067                           "build of Claws Mail. \n\n"
1068                           "Do you want to continue connecting to this "
1069                           "server? The communication would not be "
1070                           "secure."),
1071                           GTK_STOCK_CANCEL, _("Con_tinue connecting"),
1072                           NULL, FALSE, NULL, ALERT_WARNING,
1073                           G_ALERTDEFAULT) != G_ALERTALTERNATE)
1074                         return NULL;
1075         }
1076         port = account->set_imapport ? account->imapport
1077                 : IMAP4_PORT;
1078 #endif
1079
1080         imap_init(folder);
1081         buf = g_strdup_printf(_("Account '%s': Connecting to IMAP4 server: %s:%d..."),
1082                                 folder->account->account_name, folder->account->recv_server,
1083                                 port);
1084         statuswindow_print_all("%s", buf);
1085         log_message(LOG_PROTOCOL, "%s\n", buf);
1086         g_free(buf);
1087
1088 #ifndef G_OS_WIN32
1089         if (account->set_tunnelcmd) {
1090                 r = imap_threaded_connect_cmd(folder,
1091                                               account->tunnelcmd,
1092                                               account->recv_server,
1093                                               port);
1094         }
1095         else
1096 #endif
1097         {
1098 #ifdef USE_GNUTLS
1099                 if (ssl_type == SSL_TUNNEL) {
1100                         r = imap_threaded_connect_ssl(folder,
1101                                                       account->recv_server,
1102                                                       port);
1103                 }
1104                 else
1105 #endif
1106                 {
1107                         r = imap_threaded_connect(folder,
1108                                                   account->recv_server,
1109                                                   port);
1110                 }
1111         }
1112
1113         statuswindow_pop_all();
1114         if (r == MAILIMAP_NO_ERROR_AUTHENTICATED) {
1115                 authenticated = TRUE;
1116         }
1117         else if (r == MAILIMAP_NO_ERROR_NON_AUTHENTICATED) {
1118                 authenticated = FALSE;
1119         }
1120         else {
1121 #ifdef USE_GNUTLS
1122                 if (r == MAILIMAP_ERROR_SSL)
1123                         log_error(LOG_PROTOCOL, _("SSL handshake failed\n"));
1124                 else
1125 #endif
1126                         imap_handle_error(NULL, account->recv_server, r);
1127
1128                 if(!prefs_common.no_recv_err_panel) {
1129                         alertpanel_error_log(_("Can't connect to IMAP4 server: %s:%d"),
1130                                          account->recv_server, port);
1131                 } else {
1132                         log_error(LOG_PROTOCOL, _("Can't connect to IMAP4 server: %s:%d\n"),
1133                                          account->recv_server, port);
1134                 }
1135
1136                 return NULL;
1137         }
1138
1139         session = g_new0(IMAPSession, 1);
1140         session_init(SESSION(session), account, FALSE);
1141         SESSION(session)->type             = SESSION_IMAP;
1142         SESSION(session)->server           = g_strdup(account->recv_server);
1143         SESSION(session)->port             = port;
1144         SESSION(session)->sock             = NULL;
1145
1146         SESSION(session)->destroy          = imap_session_destroy;
1147
1148         session->capability = NULL;
1149
1150         session->authenticated = authenticated;
1151         session->mbox = NULL;
1152         session->exists = 0;
1153         session->recent = 0;
1154         session->expunge = 0;
1155         session->cmd_count = 0;
1156         session->folder = folder;
1157         IMAP_FOLDER(session->folder)->last_seen_separator = 0;
1158
1159 #ifdef USE_GNUTLS
1160         if (account->ssl_imap == SSL_STARTTLS) {
1161                 gint ok;
1162
1163                 ok = imap_cmd_starttls(session);
1164                 if (ok != MAILIMAP_NO_ERROR) {
1165                         log_warning(LOG_PROTOCOL, _("Can't start TLS session.\n"));
1166                         if (!is_fatal(ok)) {
1167                                 SESSION(session)->sock = NULL;
1168                                 session_destroy(SESSION(session));
1169                         }
1170                         return NULL;
1171                 }
1172
1173                 imap_free_capabilities(session);
1174                 session->authenticated = FALSE;
1175                 session->uidplus = FALSE;
1176                 session->cmd_count = 1;
1177         }
1178 #endif
1179         log_message(LOG_PROTOCOL, "IMAP connection is %s-authenticated\n",
1180                     (session->authenticated) ? "pre" : "un");
1181
1182         return session;
1183 }
1184
1185 static gint imap_session_authenticate(IMAPSession *session,
1186                                       PrefsAccount *account)
1187 {
1188         gchar *pass, *acc_pass;
1189         gboolean failed = FALSE;
1190         gint ok = MAILIMAP_NO_ERROR;
1191         g_return_val_if_fail(account->userid != NULL, MAILIMAP_ERROR_BAD_STATE);
1192         acc_pass = account->passwd;
1193 try_again:
1194         pass = acc_pass;
1195         if (!pass && account->imap_auth_type != IMAP_AUTH_ANON && account->imap_auth_type != IMAP_AUTH_GSSAPI) {
1196                 gchar *tmp_pass;
1197                 tmp_pass = input_dialog_query_password_keep(account->recv_server,
1198                                                             account->userid,
1199                                                             &(account->session_passwd));
1200                 if (!tmp_pass)
1201                         return MAILIMAP_NO_ERROR;
1202                 Xstrdup_a(pass, tmp_pass, {g_free(tmp_pass); return MAILIMAP_NO_ERROR;});
1203                 g_free(tmp_pass);
1204         } else if (account->imap_auth_type == IMAP_AUTH_ANON || account->imap_auth_type == IMAP_AUTH_GSSAPI) {
1205                 pass = "";
1206         }
1207         if ((ok = imap_auth(session, account->userid, pass, account->imap_auth_type)) != MAILIMAP_NO_ERROR) {
1208
1209                 if (!failed && !is_fatal(ok)) {
1210                         acc_pass = NULL;
1211                         failed = TRUE;
1212                         if (account->session_passwd != NULL) {
1213                                 g_free(account->session_passwd);
1214                                 account->session_passwd = NULL;
1215                         }
1216                         goto try_again;
1217                 } else {
1218                         if (prefs_common.no_recv_err_panel) {
1219                                 log_error(LOG_PROTOCOL, _("Couldn't login to IMAP server %s.\n"), account->recv_server);
1220                                 mainwindow_show_error();
1221                         } else
1222                                 alertpanel_error_log(_("Couldn't login to IMAP server %s."), account->recv_server);
1223                 }
1224
1225                 return ok;
1226         }
1227
1228         statuswindow_pop_all();
1229         session->authenticated = TRUE;
1230         return MAILIMAP_NO_ERROR;
1231 }
1232
1233 static void imap_session_destroy(Session *session)
1234 {
1235         if (session->state != SESSION_DISCONNECTED)
1236                 imap_threaded_disconnect(IMAP_SESSION(session)->folder);
1237
1238         imap_free_capabilities(IMAP_SESSION(session));
1239         g_free(IMAP_SESSION(session)->mbox);
1240 }
1241
1242 static gchar *imap_fetch_msg(Folder *folder, FolderItem *item, gint uid)
1243 {
1244         return imap_fetch_msg_full(folder, item, uid, TRUE, TRUE);
1245 }
1246
1247 static guint get_file_size_with_crs(const gchar *filename)
1248 {
1249         FILE *fp = NULL;
1250         guint cnt = 0;
1251         gchar buf[4096];
1252
1253         if (filename == NULL)
1254                 return -1;
1255
1256         fp = g_fopen(filename, "rb");
1257         if (!fp)
1258                 return -1;
1259
1260         while (fgets(buf, sizeof (buf), fp) != NULL) {
1261                 cnt += strlen(buf);
1262                 if (!strstr(buf, "\r\n") && strstr(buf, "\n"))
1263                         cnt++;
1264         }
1265
1266         fclose(fp);
1267         return cnt;
1268 }
1269
1270 static void imap_remove_cached_msg(Folder *folder, FolderItem *item, MsgInfo *msginfo)
1271 {
1272         gchar *path, *filename;
1273
1274         path = folder_item_get_path(item);
1275
1276         if (!is_dir_exist(path)) {
1277                 g_free(path);
1278                 return;
1279         }
1280
1281         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(msginfo->msgnum), NULL);
1282         g_free(path);
1283
1284         if (is_file_exist(filename)) {
1285                 claws_unlink(filename);
1286         }
1287         g_free(filename);
1288 }
1289
1290 typedef struct _TagsData {
1291         gchar *str;
1292         GSList *msglist;
1293         IMAPFolderItem *item;
1294 } TagsData;
1295
1296 static void imap_commit_tags(FolderItem *item, MsgInfo *msginfo, GSList *tags_set, GSList *tags_unset)
1297 {
1298         IMAPSession *session;
1299         gint ok, can_create_tags;
1300         Folder *folder = NULL;
1301         TagsData *ht_data = NULL;
1302         GSList *cur;
1303
1304         g_return_if_fail(item != NULL);
1305         g_return_if_fail(msginfo != NULL);
1306
1307         folder = item->folder;
1308         debug_print("getting session...\n");
1309         session = imap_session_get(folder);
1310
1311         if (!session) {
1312                 debug_print("can't get session\n");
1313                 return;
1314         }
1315
1316         ok = imap_select(session, IMAP_FOLDER(folder), item,
1317                          NULL, NULL, NULL, NULL, &can_create_tags, FALSE);
1318
1319         if (ok != MAILIMAP_NO_ERROR) {
1320                 return;
1321         }
1322
1323
1324         if (IMAP_FOLDER_ITEM(item)->can_create_flags != ITEM_CAN_CREATE_FLAGS)
1325                 return;
1326
1327         if (IMAP_FOLDER_ITEM(item)->batching) {
1328                 /* instead of performing an UID STORE command for each message change,
1329                  * as a lot of them can change "together", we just fill in hashtables
1330                  * and defer the treatment so that we're able to send only one
1331                  * command.
1332                  */
1333                 debug_print("IMAP batch mode on, deferring tags change\n");
1334                 for (cur = tags_set; cur; cur = cur->next) {
1335                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1336                         if (cur_tag) {
1337                                 ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->tags_set_table,
1338                                         GINT_TO_POINTER(cur_tag));
1339                                 if (ht_data == NULL) {
1340                                         ht_data = g_new0(TagsData, 1);
1341                                         ht_data->str = g_strdup(tags_get_tag(cur_tag));
1342                                         ht_data->item = IMAP_FOLDER_ITEM(item);
1343                                         g_hash_table_insert(IMAP_FOLDER_ITEM(item)->tags_set_table,
1344                                                 GINT_TO_POINTER(cur_tag), ht_data);
1345                                 }
1346                                 ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
1347                         }
1348                 }
1349                 for (cur = tags_unset; cur; cur = cur->next) {
1350                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1351                         if (cur_tag) {
1352                                 ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->tags_unset_table,
1353                                         GINT_TO_POINTER(cur_tag));
1354                                 if (ht_data == NULL) {
1355                                         ht_data = g_new0(TagsData, 1);
1356                                         ht_data->str = g_strdup(tags_get_tag(cur_tag));
1357                                         ht_data->item = IMAP_FOLDER_ITEM(item);
1358                                         g_hash_table_insert(IMAP_FOLDER_ITEM(item)->tags_unset_table,
1359                                                 GINT_TO_POINTER(cur_tag), ht_data);
1360                                 }
1361                                 ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
1362                         }
1363                 }
1364         } else {
1365                 GSList *list_set = NULL;
1366                 GSList *list_unset = NULL;
1367                 GSList numlist;
1368
1369                 numlist.data = GINT_TO_POINTER(msginfo->msgnum);
1370                 numlist.next = NULL;
1371
1372                 debug_print("IMAP changing tags NOW\n");
1373                 for (cur = tags_set; cur; cur = cur->next) {
1374                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1375                         const gchar *str = tags_get_tag(cur_tag);
1376                         if (IS_NOT_RESERVED_TAG(str))
1377                                 list_set = g_slist_prepend(list_set, g_strdup(str));
1378                 }
1379                 if (list_set) {
1380                         ok = imap_set_message_flags(session,
1381                                 IMAP_FOLDER_ITEM(item), &numlist, 0, list_set, TRUE);
1382                         slist_free_strings(list_set);
1383                         g_slist_free(list_set);
1384                         if (ok != MAILIMAP_NO_ERROR) {
1385                                 return;
1386                         }
1387                 }
1388
1389                 for (cur = tags_unset; cur; cur = cur->next) {
1390                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1391                         const gchar *str = tags_get_tag(cur_tag);
1392                         if (IS_NOT_RESERVED_TAG(str))
1393                                 list_unset = g_slist_prepend(list_unset, g_strdup(str));
1394                 }
1395                 if (list_unset) {
1396                         ok = imap_set_message_flags(session,
1397                                 IMAP_FOLDER_ITEM(item), &numlist, 0, list_unset, FALSE);
1398                         slist_free_strings(list_unset);
1399                         g_slist_free(list_unset);
1400                         if (ok != MAILIMAP_NO_ERROR) {
1401                                 return;
1402                         }
1403                 }
1404         }
1405 }
1406
1407 static gchar *imap_fetch_msg_full(Folder *folder, FolderItem *item, gint uid,
1408                                   gboolean headers, gboolean body)
1409 {
1410         gchar *path, *filename;
1411         IMAPSession *session;
1412         gint ok;
1413
1414         g_return_val_if_fail(folder != NULL, NULL);
1415         g_return_val_if_fail(item != NULL, NULL);
1416
1417         if (uid == 0)
1418                 return NULL;
1419
1420         path = folder_item_get_path(item);
1421         if (!is_dir_exist(path))
1422                 make_dir_hier(path);
1423         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(uid), NULL);
1424         g_free(path);
1425         debug_print("trying to fetch cached %s\n", filename);
1426         if (is_file_exist(filename)) {
1427                 /* see whether the local file represents the whole message
1428                  * or not. As the IMAP server reports size with \r chars,
1429                  * we have to update the local file (UNIX \n only) size */
1430                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1431                 guint have_size = -1;
1432
1433                 if (cached)
1434                         debug_print("message %d has been already %scached.\n", uid,
1435                                 MSG_IS_FULLY_CACHED(cached->flags) ? "fully ":"");
1436
1437                 if (!cached || !MSG_IS_FULLY_CACHED(cached->flags)) {
1438                         have_size = get_file_size_with_crs(filename);
1439                         if (cached && (cached->size <= have_size || !body)) {
1440                                 procmsg_msginfo_free(cached);
1441                                 ok = file_strip_crs(filename);
1442                                 if (ok == 0 && cached && cached->size <= have_size) {
1443                                         /* we have it all and stripped */
1444                                         debug_print("...fully cached in fact; setting flag.\n");
1445                                         procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1446                                 }
1447                                 return filename;
1448                         } else if (!cached && time(NULL) - get_file_mtime(filename) < 60) {
1449                                 debug_print("message not cached and file recent, considering file complete\n");
1450                                 ok = file_strip_crs(filename);
1451                                 if (ok == 0)
1452                                         return filename;
1453                         } else {
1454                                 procmsg_msginfo_free(cached);
1455                         }
1456                 }
1457                 if (cached && MSG_IS_FULLY_CACHED(cached->flags)) {
1458                         procmsg_msginfo_free(cached);
1459                         return filename;
1460                 }
1461         } else {
1462                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1463                 if (cached) {
1464                         procmsg_msginfo_unset_flags(cached, MSG_FULLY_CACHED, 0);
1465                         procmsg_msginfo_free(cached);
1466                 }
1467         }
1468
1469         debug_print("getting session...\n");
1470         session = imap_session_get(folder);
1471
1472         if (!session) {
1473                 g_free(filename);
1474                 return NULL;
1475         }
1476         session_set_access_time(SESSION(session));
1477         lock_session(session); /* unlocked later in the function */
1478
1479         debug_print("IMAP fetching messages\n");
1480         ok = imap_select(session, IMAP_FOLDER(folder), item,
1481                          NULL, NULL, NULL, NULL, NULL, FALSE);
1482         if (ok != MAILIMAP_NO_ERROR) {
1483                 g_warning("can't select mailbox %s\n", item->path);
1484                 g_free(filename);
1485                 return NULL;
1486         }
1487
1488         session_set_access_time(SESSION(session));
1489
1490         debug_print("getting message %d...\n", uid);
1491         ok = imap_cmd_fetch(session, (guint32)uid, filename, headers, body);
1492
1493         if (ok != MAILIMAP_NO_ERROR) {
1494                 g_warning("can't fetch message %d\n", uid);
1495                 g_free(filename);
1496                 return NULL;
1497         }
1498
1499         session_set_access_time(SESSION(session));
1500         unlock_session(session);
1501
1502         ok = file_strip_crs(filename);
1503
1504         if (ok == 0 && headers && body) {
1505                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1506                 if (cached) {
1507                         procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1508                         procmsg_msginfo_free(cached);
1509                 }
1510         } else if (ok == -1) {
1511                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1512                 if (cached) {
1513                         procmsg_msginfo_unset_flags(cached, MSG_FULLY_CACHED, 0);
1514                         procmsg_msginfo_free(cached);
1515                 }
1516         }
1517         return filename;
1518 }
1519
1520 static gboolean imap_is_msg_fully_cached(Folder *folder, FolderItem *item, gint uid)
1521 {
1522         gchar *path, *filename;
1523         guint size = 0;
1524         MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1525
1526         if (!cached)
1527                 return FALSE;
1528
1529         if (MSG_IS_FULLY_CACHED(cached->flags)) {
1530                 procmsg_msginfo_free(cached);
1531                 return TRUE;
1532         }
1533         path = folder_item_get_path(item);
1534         if (!is_dir_exist(path))
1535                 return FALSE;
1536
1537         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(uid), NULL);
1538         g_free(path);
1539         if (is_file_exist(filename)) {
1540                 if (cached && cached->total_size == cached->size) {
1541                         /* fast path */
1542                         g_free(filename);
1543                         procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1544                         return TRUE;
1545                 }
1546                 size = get_file_size_with_crs(filename);
1547                 g_free(filename);
1548         }
1549         if (cached && size >= cached->size) {
1550                 cached->total_size = cached->size;
1551                 procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1552                 procmsg_msginfo_free(cached);
1553                 return TRUE;
1554         }
1555         if (cached)
1556                 procmsg_msginfo_free(cached);
1557         return FALSE;
1558 }
1559
1560 void imap_cache_msg(FolderItem *item, gint msgnum)
1561 {
1562         Folder *folder = NULL;
1563
1564         if (!item)
1565                 return;
1566         folder = item->folder;
1567
1568         if (!imap_is_msg_fully_cached(folder, item, msgnum)) {
1569                 gchar *tmp = imap_fetch_msg_full(folder, item, msgnum, TRUE, TRUE);
1570                 debug_print("fetched %s\n", tmp);
1571                 g_free(tmp);
1572         }
1573 }
1574
1575 static gint imap_add_msg(Folder *folder, FolderItem *dest,
1576                          const gchar *file, MsgFlags *flags)
1577 {
1578         gint ret;
1579         GSList file_list;
1580         MsgFileInfo fileinfo;
1581
1582         g_return_val_if_fail(file != NULL, -1);
1583
1584         fileinfo.msginfo = NULL;
1585         fileinfo.file = (gchar *)file;
1586         fileinfo.flags = flags;
1587         file_list.data = &fileinfo;
1588         file_list.next = NULL;
1589
1590         ret = imap_add_msgs(folder, dest, &file_list, NULL);
1591         return ret;
1592 }
1593
1594 static gint imap_add_msgs(Folder *folder, FolderItem *dest, GSList *file_list,
1595                    GHashTable *relation)
1596 {
1597         gchar *destdir;
1598         IMAPSession *session;
1599         guint32 last_uid = 0;
1600         GSList *cur;
1601         MsgFileInfo *fileinfo;
1602         gint ok = MAILIMAP_NO_ERROR;
1603         gint curnum = 0, total = 0;
1604         gboolean missing_uids = FALSE;
1605
1606         g_return_val_if_fail(folder != NULL, -1);
1607         g_return_val_if_fail(dest != NULL, -1);
1608         g_return_val_if_fail(file_list != NULL, -1);
1609
1610         debug_print("getting session...\n");
1611         session = imap_session_get(folder);
1612         if (!session) {
1613                 return -1;
1614         }
1615         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
1616         if (is_fatal(ok))
1617                 return -1;
1618         statusbar_print_all(_("Adding messages..."));
1619         total = g_slist_length(file_list);
1620         for (cur = file_list; cur != NULL; cur = cur->next) {
1621                 IMAPFlags iflags = 0;
1622                 guint32 new_uid = 0;
1623                 gchar *real_file = NULL;
1624                 fileinfo = (MsgFileInfo *)cur->data;
1625
1626                 statusbar_progress_all(curnum, total, total < 10 ? 1:10);
1627                 curnum++;
1628
1629                 if (fileinfo->flags) {
1630                         if (MSG_IS_MARKED(*fileinfo->flags))
1631                                 iflags |= IMAP_FLAG_FLAGGED;
1632                         if (MSG_IS_REPLIED(*fileinfo->flags))
1633                                 iflags |= IMAP_FLAG_ANSWERED;
1634                         if (MSG_IS_FORWARDED(*fileinfo->flags))
1635                                 iflags |= IMAP_FLAG_FORWARDED;
1636                         if (MSG_IS_SPAM(*fileinfo->flags))
1637                                 iflags |= IMAP_FLAG_SPAM;
1638                         else
1639                                 iflags |= IMAP_FLAG_HAM;
1640                         if (!MSG_IS_UNREAD(*fileinfo->flags))
1641                                 iflags |= IMAP_FLAG_SEEN;
1642
1643                 }
1644
1645                 if (real_file == NULL)
1646                         real_file = g_strdup(fileinfo->file);
1647
1648                 if (folder_has_parent_of_type(dest, F_QUEUE) ||
1649                     folder_has_parent_of_type(dest, F_OUTBOX) ||
1650                     folder_has_parent_of_type(dest, F_DRAFT) ||
1651                     folder_has_parent_of_type(dest, F_TRASH))
1652                         iflags |= IMAP_FLAG_SEEN;
1653
1654                 ok = imap_cmd_append(session, IMAP_FOLDER_ITEM(dest), destdir, real_file, iflags,
1655                                      &new_uid);
1656
1657                 if (ok != MAILIMAP_NO_ERROR) {
1658                         g_warning("can't append message %s\n", real_file);
1659                         g_free(real_file);
1660                         g_free(destdir);
1661                         statusbar_progress_all(0,0,0);
1662                         statusbar_pop_all();
1663                         return -1;
1664                 } else {
1665                         debug_print("appended new message as %d\n", new_uid);
1666                         /* put the local file in the imapcache, so that we don't
1667                          * have to fetch it back later. */
1668
1669                         if (new_uid == 0) {
1670                                 missing_uids = TRUE;
1671                                 debug_print("Missing UID (0)\n");
1672                         }
1673                         if (new_uid > 0) {
1674                                 gchar *cache_path = folder_item_get_path(dest);
1675                                 if (!is_dir_exist(cache_path))
1676                                         make_dir_hier(cache_path);
1677                                 if (is_dir_exist(cache_path)) {
1678                                         gchar *cache_file = g_strconcat(
1679                                                 cache_path, G_DIR_SEPARATOR_S,
1680                                                 itos(new_uid), NULL);
1681                                         copy_file(real_file, cache_file, TRUE);
1682                                         debug_print("got UID %d, copied to cache: %s\n", new_uid, cache_file);
1683                                         g_free(cache_file);
1684                                 }
1685                                 g_free(cache_path);
1686                         }
1687                 }
1688
1689                 if (relation != NULL)
1690                         g_hash_table_insert(relation, fileinfo->msginfo != NULL ?
1691                                           (gpointer) fileinfo->msginfo : (gpointer) fileinfo,
1692                                           GINT_TO_POINTER(new_uid));
1693                 if (last_uid < new_uid) {
1694                         last_uid = new_uid;
1695                 }
1696
1697                 g_free(real_file);
1698         }
1699
1700         statusbar_progress_all(0,0,0);
1701         statusbar_pop_all();
1702
1703
1704         g_free(destdir);
1705
1706         imap_scan_required(folder, dest);
1707
1708         session = imap_session_get(folder);
1709         if (!session) {
1710                 return -1;
1711         }
1712         if (missing_uids) {
1713                 gint a;
1714                 ok = imap_select(session, IMAP_FOLDER(folder), dest,
1715                          &a, NULL, NULL, NULL, NULL, FALSE);
1716         }
1717         return last_uid;
1718 }
1719
1720 static GSList *flatten_mailimap_set(struct mailimap_set * set)
1721 {
1722         GSList *result = NULL;
1723         clistiter *list;
1724         guint32 start, end, t;
1725         GSList *cur;
1726
1727         if (!set || !set->set_list)
1728                 return NULL;
1729
1730         for (list = clist_begin(set->set_list); list; list = clist_next(list)) {
1731                 struct mailimap_set_item *item = (struct mailimap_set_item *)clist_content(list);
1732                 start = item->set_first;
1733                 end = item->set_last;
1734                 if (start <= end) {
1735                         for (t = start; t <= end; t++) {
1736                                 result = g_slist_prepend(result, GINT_TO_POINTER(t));
1737                         }
1738                 }
1739         }
1740         result = g_slist_reverse(result);
1741         if (debug_get_mode()) {
1742                 debug_print("flat imap set: ");
1743                 for (cur = result; cur; cur = cur->next) {
1744                         debug_print("%d ", GPOINTER_TO_INT(cur->data));
1745                 }
1746                 debug_print("\n");
1747         }
1748
1749         return result;
1750 }
1751 static gint imap_do_copy_msgs(Folder *folder, FolderItem *dest,
1752                               MsgInfoList *msglist, GHashTable *relation)
1753 {
1754         FolderItem *src;
1755         gchar *destdir;
1756         GSList *seq_list, *cur;
1757         MsgInfo *msginfo;
1758         IMAPSession *session;
1759         gint ok = MAILIMAP_NO_ERROR;
1760         GHashTable *uid_hash;
1761         gint last_num = 0;
1762
1763         g_return_val_if_fail(folder != NULL, -1);
1764         g_return_val_if_fail(dest != NULL, -1);
1765         g_return_val_if_fail(msglist != NULL, -1);
1766
1767         debug_print("getting session...\n");
1768         session = imap_session_get(folder);
1769
1770         if (!session) {
1771                 return -1;
1772         }
1773
1774         msginfo = (MsgInfo *)msglist->data;
1775         src = msginfo->folder;
1776         if (src == dest) {
1777                 g_warning("the src folder is identical to the dest.\n");
1778                 return -1;
1779         }
1780
1781         if (src->folder != dest->folder) {
1782                 GSList *infolist = NULL, *cur;
1783                 int res = -1;
1784                 for (cur = msglist; cur; cur = cur->next) {
1785                         msginfo = (MsgInfo *)cur->data;
1786                         MsgFileInfo *fileinfo = g_new0(MsgFileInfo, 1);
1787                         fileinfo->file = procmsg_get_message_file(msginfo);
1788                         fileinfo->flags = &(msginfo->flags);
1789                         infolist = g_slist_prepend(infolist, fileinfo);
1790                 }
1791                 infolist = g_slist_reverse(infolist);
1792                 res = folder_item_add_msgs(dest, infolist, FALSE);
1793                 for (cur = infolist; cur; cur = cur->next) {
1794                         MsgFileInfo *info = (MsgFileInfo *)cur->data;
1795                         g_free(info->file);
1796                         g_free(info);
1797                 }
1798                 g_slist_free(infolist);
1799                 return res;
1800         }
1801
1802         lock_session(session); /* unlocked later in the function */
1803
1804         ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
1805                          NULL, NULL, NULL, NULL, NULL, FALSE);
1806         if (ok != MAILIMAP_NO_ERROR) {
1807                 return ok;
1808         }
1809
1810         unlock_session(session);
1811
1812         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
1813
1814         if (is_fatal(ok))
1815                 return ok;
1816
1817         seq_list = imap_get_lep_set_from_msglist(IMAP_FOLDER(folder), msglist);
1818         uid_hash = g_hash_table_new(g_direct_hash, g_direct_equal);
1819
1820         statusbar_print_all(_("Copying messages..."));
1821         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
1822                 struct mailimap_set * seq_set;
1823                 struct mailimap_set * source = NULL;
1824                 struct mailimap_set * dest = NULL;
1825                 seq_set = cur->data;
1826
1827                 debug_print("Copying messages from %s to %s ...\n",
1828                             src->path, destdir);
1829
1830                 lock_session(session); /* unlocked later in the function */
1831                 ok = imap_cmd_copy(session, seq_set, destdir,
1832                         &source, &dest);
1833
1834                 if (is_fatal(ok)) {
1835                         session = NULL;
1836                 }
1837
1838                 if (ok == MAILIMAP_NO_ERROR) {
1839                         unlock_session(session);
1840                         if (relation && source && dest) {
1841                                 GSList *s_list = flatten_mailimap_set(source);
1842                                 GSList *d_list = flatten_mailimap_set(dest);
1843                                 GSList *s_cur, *d_cur;
1844                                 if (g_slist_length(s_list) == g_slist_length(d_list)) {
1845
1846                                         for (s_cur = s_list, d_cur = d_list;
1847                                              s_cur && d_cur;
1848                                              s_cur = s_cur->next, d_cur = d_cur->next) {
1849                                                 g_hash_table_insert(uid_hash, s_cur->data, d_cur->data);
1850                                         }
1851
1852                                 } else {
1853                                         debug_print("hhhmm, source list length != dest list length.\n");
1854                                 }
1855                                 g_slist_free(s_list);
1856                                 g_slist_free(d_list);
1857                         }
1858                 }
1859
1860
1861                 if (source)
1862                         mailimap_set_free(source);
1863                 if (dest)
1864                         mailimap_set_free(dest);
1865
1866                 if (ok != MAILIMAP_NO_ERROR) {
1867                         g_hash_table_destroy(uid_hash);
1868                         imap_lep_set_free(seq_list);
1869                         statusbar_pop_all();
1870                         return -1;
1871                 }
1872         }
1873
1874         for (cur = msglist; cur != NULL; cur = g_slist_next(cur)) {
1875                 MsgInfo *msginfo = (MsgInfo *)cur->data;
1876                 gpointer hashval;
1877
1878                 hashval = g_hash_table_lookup(uid_hash, GINT_TO_POINTER(msginfo->msgnum));
1879
1880                 if (hashval != NULL) {
1881                         gint num = GPOINTER_TO_INT(hashval);
1882                         g_hash_table_insert(relation, msginfo,
1883                                           GINT_TO_POINTER(num));
1884                         if (num > last_num)
1885                                 last_num = num;
1886                         debug_print("copied message %d as %d\n", msginfo->msgnum, num);
1887                         /* put the local file in the imapcache, so that we don't
1888                          * have to fetch it back later. */
1889                         if (num > 0) {
1890                                 gchar *cache_path = folder_item_get_path(msginfo->folder);
1891                                 gchar *real_file = g_strconcat(
1892                                         cache_path, G_DIR_SEPARATOR_S,
1893                                         itos(msginfo->msgnum), NULL);
1894                                 gchar *cache_file = NULL;
1895                                 g_free(cache_path);
1896                                 cache_path = folder_item_get_path(dest);
1897                                 cache_file = g_strconcat(
1898                                         cache_path, G_DIR_SEPARATOR_S,
1899                                         itos(num), NULL);
1900                                 if (!is_dir_exist(cache_path))
1901                                         make_dir_hier(cache_path);
1902                                 if (is_file_exist(real_file) && is_dir_exist(cache_path)) {
1903                                         copy_file(real_file, cache_file, TRUE);
1904                                         debug_print("copied to cache: %s\n", cache_file);
1905                                 }
1906                                 g_free(real_file);
1907                                 g_free(cache_file);
1908                                 g_free(cache_path);
1909                         }
1910                 } else
1911                         g_hash_table_insert(relation, msginfo,
1912                                           GINT_TO_POINTER(0));
1913         }
1914         statusbar_pop_all();
1915
1916         g_hash_table_destroy(uid_hash);
1917         imap_lep_set_free(seq_list);
1918
1919         g_free(destdir);
1920
1921         IMAP_FOLDER_ITEM(dest)->lastuid = 0;
1922         IMAP_FOLDER_ITEM(dest)->uid_next = 0;
1923         g_slist_free(IMAP_FOLDER_ITEM(dest)->uid_list);
1924         IMAP_FOLDER_ITEM(dest)->uid_list = NULL;
1925
1926         imap_scan_required(folder, dest);
1927         if (ok == MAILIMAP_NO_ERROR)
1928                 return last_num;
1929         else
1930                 return -1;
1931 }
1932
1933 static gint imap_copy_msg(Folder *folder, FolderItem *dest, MsgInfo *msginfo)
1934 {
1935         GSList msglist;
1936
1937         g_return_val_if_fail(msginfo != NULL, -1);
1938
1939         msglist.data = msginfo;
1940         msglist.next = NULL;
1941
1942         return imap_copy_msgs(folder, dest, &msglist, NULL);
1943 }
1944
1945 static gint imap_copy_msgs(Folder *folder, FolderItem *dest,
1946                     MsgInfoList *msglist, GHashTable *relation)
1947 {
1948         MsgInfo *msginfo;
1949         gint ret;
1950
1951         g_return_val_if_fail(folder != NULL, -1);
1952         g_return_val_if_fail(dest != NULL, -1);
1953         g_return_val_if_fail(msglist != NULL, -1);
1954
1955         msginfo = (MsgInfo *)msglist->data;
1956         g_return_val_if_fail(msginfo->folder != NULL, -1);
1957
1958         ret = imap_do_copy_msgs(folder, dest, msglist, relation);
1959         return ret;
1960 }
1961
1962
1963 static IMAPSearchKey* search_make_key(MatcherProp* match, gboolean* is_all)
1964 {
1965         if (match->matchtype == MATCHTYPE_MATCHCASE || match->matchtype == MATCHTYPE_MATCH) {
1966                 IMAPSearchKey* result = NULL;
1967                 gboolean invert = FALSE;
1968                 gint matchertype = match->criteria;
1969
1970                 if (is_all) {
1971                         *is_all = FALSE;
1972                 }
1973
1974                 switch (matchertype) {
1975                 case MATCHCRITERIA_NOT_NEW: invert = TRUE; matchertype = MATCHCRITERIA_NEW; break;
1976                 case MATCHCRITERIA_NOT_MARKED: invert = TRUE; matchertype = MATCHCRITERIA_MARKED; break;
1977                 case MATCHCRITERIA_NOT_FORWARDED: invert = TRUE; matchertype = MATCHCRITERIA_FORWARDED; break;
1978                 case MATCHCRITERIA_NOT_SPAM: invert = TRUE; matchertype = MATCHCRITERIA_SPAM; break;
1979                 case MATCHCRITERIA_NOT_SUBJECT: invert = TRUE; matchertype = MATCHCRITERIA_SUBJECT; break;
1980                 case MATCHCRITERIA_NOT_FROM: invert = TRUE; matchertype = MATCHCRITERIA_FROM; break;
1981                 case MATCHCRITERIA_NOT_TO: invert = TRUE; matchertype = MATCHCRITERIA_TO; break;
1982                 case MATCHCRITERIA_NOT_CC: invert = TRUE; matchertype = MATCHCRITERIA_CC; break;
1983                 case MATCHCRITERIA_NOT_REFERENCES: invert = TRUE; matchertype = MATCHCRITERIA_REFERENCES; break;
1984                 case MATCHCRITERIA_NOT_HEADER: invert = TRUE; matchertype = MATCHCRITERIA_HEADER; break;
1985                 case MATCHCRITERIA_NOT_TAG: invert = TRUE; matchertype = MATCHCRITERIA_TAG; break;
1986                 case MATCHCRITERIA_NOT_HEADERS_PART: invert = TRUE; matchertype = MATCHCRITERIA_HEADERS_PART; break;
1987                 case MATCHCRITERIA_NOT_MESSAGE: invert = TRUE; matchertype = MATCHCRITERIA_MESSAGE; break;
1988                 case MATCHCRITERIA_NOT_BODY_PART: invert = TRUE; matchertype = MATCHCRITERIA_BODY_PART; break;
1989                 case MATCHCRITERIA_NOT_TO_AND_NOT_CC: invert = TRUE; matchertype = MATCHCRITERIA_TO_OR_CC; break;
1990                 case MATCHCRITERIA_NOT_INREPLYTO: invert = TRUE; matchertype = MATCHCRITERIA_INREPLYTO; break;
1991                 }
1992
1993                 /*
1994                  * this aborts conversion even for predicates understood by the following code.
1995                  * while that might seem wasteful, claws local search for information listed below
1996                  * has proven faster than IMAP search plus network roundtrips. once this changes,
1997                  * consider removing these exceptions.
1998                  */
1999                 switch (matchertype) {
2000                 case MATCHCRITERIA_FROM:
2001                 case MATCHCRITERIA_TO:
2002                 case MATCHCRITERIA_CC:
2003                 case MATCHCRITERIA_TO_OR_CC:
2004                 case MATCHCRITERIA_SUBJECT:
2005                 case MATCHCRITERIA_REFERENCES:
2006                 case MATCHCRITERIA_INREPLYTO:
2007                 case MATCHCRITERIA_AGE_GREATER:
2008                 case MATCHCRITERIA_AGE_LOWER:
2009                 case MATCHCRITERIA_FORWARDED:
2010                 case MATCHCRITERIA_SPAM:
2011                 case MATCHCRITERIA_UNREAD:
2012                 case MATCHCRITERIA_NEW:
2013                 case MATCHCRITERIA_MARKED:
2014                 case MATCHCRITERIA_REPLIED:
2015                 case MATCHCRITERIA_DELETED:
2016                 case MATCHCRITERIA_SIZE_GREATER:
2017                 case MATCHCRITERIA_SIZE_SMALLER:
2018                 case MATCHCRITERIA_SIZE_EQUAL:
2019                         return NULL;
2020                 }
2021
2022                 /* the Message-ID header is also cached */
2023                 if (matchertype == MATCHCRITERIA_HEADER && g_strcmp0("Message-ID", match->header) == 0) {
2024                         return NULL;
2025                 }
2026
2027                 switch (matchertype) {
2028                 case MATCHCRITERIA_FORWARDED:
2029                         result = imap_search_new(IMAP_SEARCH_CRITERIA_TAG, NULL, RTAG_FORWARDED, 0);
2030                         break;
2031
2032                 case MATCHCRITERIA_SPAM:
2033                         result = imap_search_new(IMAP_SEARCH_CRITERIA_TAG, NULL, RTAG_JUNK, 0);
2034                         break;
2035
2036                 case MATCHCRITERIA_INREPLYTO:
2037                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, "In-Reply-To", match->expr, 0);
2038                         break;
2039
2040                 case MATCHCRITERIA_REFERENCES:
2041                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, "References", match->expr, 0);
2042                         break;
2043
2044                 case MATCHCRITERIA_TO_OR_CC:
2045                         result = imap_search_or(
2046                                         imap_search_new(IMAP_SEARCH_CRITERIA_TO, NULL, match->expr, 0),
2047                                         imap_search_new(IMAP_SEARCH_CRITERIA_CC, NULL, match->expr, 0)
2048                                         );
2049                         break;
2050
2051                 case MATCHCRITERIA_HEADERS_PART:
2052                         result = imap_search_and(
2053                                         imap_search_not(imap_search_new(IMAP_SEARCH_CRITERIA_BODY, NULL, match->expr, 0)),
2054                                         imap_search_new(IMAP_SEARCH_CRITERIA_MESSAGE, NULL, match->expr, 0)
2055                                         );
2056                         break;
2057
2058                 case MATCHCRITERIA_SIZE_EQUAL:
2059                         result = imap_search_and(
2060                                         imap_search_not(imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_SMALLER, NULL, NULL, match->value)),
2061                                         imap_search_not(imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_GREATER, NULL, NULL, match->value))
2062                                         );
2063                         break;
2064
2065                 case MATCHCRITERIA_NOT_UNREAD:
2066                         result = imap_search_new(IMAP_SEARCH_CRITERIA_READ, NULL, NULL, 0);
2067                         break;
2068
2069                 case MATCHCRITERIA_UNREAD:
2070                         result = imap_search_new(IMAP_SEARCH_CRITERIA_UNREAD, NULL, NULL, 0);
2071                         break;
2072
2073                 case MATCHCRITERIA_NEW:
2074                         result = imap_search_new(IMAP_SEARCH_CRITERIA_NEW, NULL, NULL, 0);
2075                         break;
2076
2077                 case MATCHCRITERIA_MARKED:
2078                         result = imap_search_new(IMAP_SEARCH_CRITERIA_MARKED, NULL, NULL, 0);
2079                         break;
2080
2081                 case MATCHCRITERIA_DELETED:
2082                         result = imap_search_new(IMAP_SEARCH_CRITERIA_DELETED, NULL, NULL, 0);
2083                         break;
2084
2085                 case MATCHCRITERIA_REPLIED:
2086                         result = imap_search_new(IMAP_SEARCH_CRITERIA_REPLIED, NULL, NULL, 0);
2087                         break;
2088
2089                 case MATCHCRITERIA_TAG:
2090                         {
2091                                 gchar *tmp = imap_utf8_to_modified_utf7(match->expr, TRUE);
2092                                 result = imap_search_new(IMAP_SEARCH_CRITERIA_TAG, NULL, tmp, 0);
2093                                 g_free(tmp);
2094                         }
2095                         break;
2096
2097                 case MATCHCRITERIA_SUBJECT:
2098                         result = imap_search_new(IMAP_SEARCH_CRITERIA_SUBJECT, NULL, match->expr, 0);
2099                         break;
2100
2101                 case MATCHCRITERIA_FROM:
2102                         result = imap_search_new(IMAP_SEARCH_CRITERIA_FROM, NULL, match->expr, 0);
2103                         break;
2104
2105                 case MATCHCRITERIA_TO:
2106                         result = imap_search_new(IMAP_SEARCH_CRITERIA_TO, NULL, match->expr, 0);
2107                         break;
2108
2109                 case MATCHCRITERIA_CC:
2110                         result = imap_search_new(IMAP_SEARCH_CRITERIA_CC, NULL, match->expr, 0);
2111                         break;
2112
2113                 case MATCHCRITERIA_AGE_GREATER:
2114                         result = imap_search_new(IMAP_SEARCH_CRITERIA_AGE_GREATER, NULL, NULL, match->value);
2115                         break;
2116
2117                 case MATCHCRITERIA_AGE_LOWER:
2118                         result = imap_search_new(IMAP_SEARCH_CRITERIA_AGE_LOWER, NULL, NULL, match->value);
2119                         break;
2120
2121                 case MATCHCRITERIA_BODY_PART:
2122                         result = imap_search_new(IMAP_SEARCH_CRITERIA_BODY, NULL, match->expr, 0);
2123                         break;
2124
2125                 case MATCHCRITERIA_MESSAGE:
2126                         result = imap_search_new(IMAP_SEARCH_CRITERIA_MESSAGE, NULL, match->expr, 0);
2127                         break;
2128
2129                 case MATCHCRITERIA_HEADER:
2130                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, match->header, match->expr, 0);
2131                         break;
2132
2133                 case MATCHCRITERIA_SIZE_GREATER:
2134                         result = imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_GREATER, NULL, NULL, match->value);
2135                         break;
2136
2137                 case MATCHCRITERIA_SIZE_SMALLER:
2138                         result = imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_SMALLER, NULL, NULL, match->value);
2139                         break;
2140
2141                 default:
2142                         result = imap_search_new(IMAP_SEARCH_CRITERIA_ALL, NULL, NULL, 0);
2143                         if (is_all) {
2144                                 *is_all = TRUE;
2145                         }
2146                         break;
2147                 }
2148
2149                 if (invert) {
2150                         result = imap_search_not(result);
2151                         if (is_all && *is_all) {
2152                                 *is_all = FALSE;
2153                         }
2154                 }
2155
2156                 return result;
2157         }
2158
2159         return NULL;
2160 }
2161
2162 static gint     search_msgs             (Folder                 *folder,
2163                                          FolderItem             *container,
2164                                          MsgNumberList          **msgs,
2165                                          gboolean               *on_server,
2166                                          MatcherList            *predicate,
2167                                          SearchProgressNotify   progress_cb,
2168                                          gpointer               progress_data)
2169 {
2170         IMAPSearchKey* key = NULL;
2171         GSList* cur;
2172         int result = -1;
2173         clist* uidlist = NULL;
2174         gboolean server_filtering_useless = FALSE;
2175         IMAPSession *session;
2176
2177         if (on_server == NULL || !*on_server) {
2178                 return folder_item_search_msgs_local(folder, container, msgs, on_server,
2179                                 predicate, progress_cb, progress_data);
2180         }
2181
2182         for (cur = predicate->matchers; cur != NULL; cur = cur->next) {
2183                 IMAPSearchKey* matcherPart = NULL;
2184                 MatcherProp* prop = (MatcherProp*) cur->data;
2185                 gboolean is_all;
2186
2187                 matcherPart = search_make_key(prop, &is_all);
2188
2189                 if (on_server) {
2190                         *on_server &= matcherPart != NULL && prop->matchtype == MATCHTYPE_MATCHCASE;
2191                 }
2192
2193                 if (matcherPart) {
2194                         if (key == NULL) {
2195                                 key = matcherPart;
2196                                 server_filtering_useless = is_all;
2197                         } else if (predicate->bool_and) {
2198                                 key = imap_search_and(key, matcherPart);
2199                                 server_filtering_useless &= is_all;
2200                         } else {
2201                                 key = imap_search_or(key, matcherPart);
2202                                 server_filtering_useless |= is_all;
2203                         }
2204                 }
2205         }
2206
2207         if (server_filtering_useless) {
2208                 imap_search_free(key);
2209                 key = NULL;
2210         }
2211
2212         if (key == NULL && progress_cb != NULL) {
2213                 GSList* cur;
2214                 GSList* list;
2215                 int count = 0;
2216
2217                 progress_cb(progress_data, TRUE, 0, 0, container->total_msgs);
2218                 progress_cb(progress_data, TRUE, container->total_msgs, 0, container->total_msgs);
2219
2220                 list = folder_item_get_msg_list(container);
2221                 for (cur = list; cur != NULL; cur = cur->next) {
2222                         *msgs = g_slist_prepend(*msgs, GUINT_TO_POINTER(((MsgInfo*) cur->data)->msgnum));
2223                         count++;
2224                 }
2225                 *msgs = g_slist_reverse(*msgs);
2226                 return count;
2227         }
2228
2229         session = imap_session_get(folder);
2230         if (!session) {
2231                 return -1;
2232         }
2233         result = imap_select(session, IMAP_FOLDER(folder), FOLDER_ITEM(container),
2234                          NULL, NULL, NULL, NULL, NULL, TRUE);
2235         if (result != MAILIMAP_NO_ERROR)
2236                 return -1;
2237
2238         if (progress_cb)
2239                 progress_cb(progress_data, TRUE, 0, 0, container->total_msgs);
2240         result = imap_threaded_search(folder, IMAP_SEARCH_TYPE_KEYED, key, NULL, &uidlist);
2241         if (progress_cb)
2242                 progress_cb(progress_data, TRUE, container->total_msgs, 0, container->total_msgs);
2243
2244         if (result == MAILIMAP_NO_ERROR) {
2245                 gint result = 0;
2246
2247                 *msgs = imap_uid_list_from_lep(uidlist, &result);
2248                 mailimap_search_result_free(uidlist);
2249
2250                 return result;
2251         } else {
2252                 return -1;
2253         }
2254 }
2255
2256
2257 static gint imap_do_remove_msgs(Folder *folder, FolderItem *dest,
2258                                 MsgInfoList *msglist, GHashTable *relation)
2259 {
2260         gchar *destdir, *dir;
2261         GSList *numlist = NULL, *cur;
2262         MsgInfo *msginfo;
2263         IMAPSession *session;
2264         gint ok = MAILIMAP_NO_ERROR;
2265
2266         g_return_val_if_fail(folder != NULL, -1);
2267         g_return_val_if_fail(dest != NULL, -1);
2268         g_return_val_if_fail(msglist != NULL, -1);
2269
2270         debug_print("getting session...\n");
2271         session = imap_session_get(folder);
2272         if (!session) {
2273                 return -1;
2274         }
2275
2276         lock_session(session); /* unlocked later in the function */
2277
2278         msginfo = (MsgInfo *)msglist->data;
2279
2280         ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
2281                          NULL, NULL, NULL, NULL, NULL, FALSE);
2282         if (ok != MAILIMAP_NO_ERROR) {
2283                 return ok;
2284         }
2285
2286         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
2287         if (is_fatal(ok)) {
2288                 g_free(destdir);
2289                 return ok;
2290         }
2291         for (cur = msglist; cur; cur = cur->next) {
2292                 msginfo = (MsgInfo *)cur->data;
2293                 if (!MSG_IS_DELETED(msginfo->flags))
2294                         numlist = g_slist_prepend(numlist, GINT_TO_POINTER(msginfo->msgnum));
2295         }
2296         numlist = g_slist_reverse(numlist);
2297
2298         if (numlist != NULL) {
2299                 ok = imap_set_message_flags
2300                         (session, IMAP_FOLDER_ITEM(msginfo->folder), numlist, IMAP_FLAG_DELETED, NULL, TRUE);
2301                 if (ok != MAILIMAP_NO_ERROR) {
2302                         log_warning(LOG_PROTOCOL, _("can't set deleted flags\n"));
2303                         g_free(destdir);
2304                         return ok;
2305                 }
2306         } /* else we just need to expunge */
2307         ok = imap_cmd_expunge(session, folder->account->imap_use_trash);
2308         if (ok != MAILIMAP_NO_ERROR) {
2309                 log_warning(LOG_PROTOCOL, _("can't expunge\n"));
2310                 g_free(destdir);
2311                 return ok;
2312         }
2313
2314         session->folder_content_changed = TRUE;
2315         unlock_session(session);
2316
2317         dir = folder_item_get_path(msginfo->folder);
2318         if (is_dir_exist(dir)) {
2319                 for (cur = msglist; cur; cur = cur->next) {
2320                         msginfo = (MsgInfo *)cur->data;
2321                         remove_numbered_files(dir, msginfo->msgnum, msginfo->msgnum);
2322                 }
2323         }
2324         g_free(dir);
2325
2326         g_slist_free(numlist);
2327
2328         imap_scan_required(folder, dest);
2329
2330         g_free(destdir);
2331         if (ok == MAILIMAP_NO_ERROR)
2332                 return 0;
2333         else
2334                 return -1;
2335 }
2336
2337 static gint imap_remove_msgs(Folder *folder, FolderItem *dest,
2338                     MsgInfoList *msglist, GHashTable *relation)
2339 {
2340         MsgInfo *msginfo;
2341
2342         g_return_val_if_fail(folder != NULL, -1);
2343         g_return_val_if_fail(dest != NULL, -1);
2344         if (msglist == NULL)
2345                 return 0;
2346
2347         msginfo = (MsgInfo *)msglist->data;
2348         g_return_val_if_fail(msginfo->folder != NULL, -1);
2349
2350         return imap_do_remove_msgs(folder, dest, msglist, relation);
2351 }
2352
2353 static gint imap_remove_all_msg(Folder *folder, FolderItem *item)
2354 {
2355         GSList *list = folder_item_get_msg_list(item);
2356         gint res = imap_remove_msgs(folder, item, list, NULL);
2357         procmsg_msg_list_free(list);
2358         return res;
2359 }
2360
2361 static gboolean imap_is_msg_changed(Folder *folder, FolderItem *item,
2362                                     MsgInfo *msginfo)
2363 {
2364         /* TODO: properly implement this method */
2365         return FALSE;
2366 }
2367
2368 static gint imap_close(Folder *folder, FolderItem *item)
2369 {
2370         return 0;
2371 }
2372
2373 static gint imap_scan_tree_real(Folder *folder, gboolean subs_only)
2374 {
2375         FolderItem *item = NULL;
2376         IMAPSession *session;
2377         gchar *root_folder = NULL;
2378
2379         g_return_val_if_fail(folder != NULL, -1);
2380         g_return_val_if_fail(folder->account != NULL, -1);
2381
2382         debug_print("getting session...\n");
2383         session = imap_session_get(folder);
2384         if (!session) {
2385                 if (!folder->node) {
2386                         folder_tree_destroy(folder);
2387                         item = folder_item_new(folder, folder->name, NULL);
2388                         item->folder = folder;
2389                         folder->node = item->node = g_node_new(item);
2390                 }
2391                 return -1;
2392         }
2393
2394         if (folder->account->imap_dir && *folder->account->imap_dir) {
2395                 gchar *real_path;
2396                 int r = MAILIMAP_NO_ERROR;
2397                 clist * lep_list;
2398
2399                 Xstrdup_a(root_folder, folder->account->imap_dir, {return -1;});
2400                 extract_quote(root_folder, '"');
2401                 subst_char(root_folder,
2402                            imap_get_path_separator(session, IMAP_FOLDER(folder),
2403                                                    root_folder, &r),
2404                            '/');
2405                 if (is_fatal(r))
2406                         return -1;
2407                 strtailchomp(root_folder, '/');
2408                 real_path = imap_get_real_path
2409                         (session, IMAP_FOLDER(folder), root_folder, &r);
2410                 if (is_fatal(r))
2411                         return -1;
2412                 debug_print("IMAP root directory: %s\n", real_path);
2413
2414                 /* check if root directory exist */
2415
2416                 r = imap_threaded_list(session->folder, "", real_path,
2417                                        &lep_list);
2418
2419                 if (r != MAILIMAP_NO_ERROR)
2420                         imap_handle_error(SESSION(session), NULL, r);
2421
2422                 if ((r != MAILIMAP_NO_ERROR) || (clist_count(lep_list) == 0)) {
2423                         if (!folder->node) {
2424                                 item = folder_item_new(folder, folder->name, NULL);
2425                                 item->folder = folder;
2426                                 folder->node = item->node = g_node_new(item);
2427                         }
2428                         return -1;
2429                 }
2430                 mailimap_list_result_free(lep_list);
2431
2432                 g_free(real_path);
2433         }
2434
2435         if (folder->node)
2436                 item = FOLDER_ITEM(folder->node->data);
2437
2438         if (item && !item->path && root_folder) {
2439                 item->path = g_strdup(root_folder);
2440         }
2441
2442         if (!item || ((item->path || root_folder) &&
2443                       strcmp2(item->path, root_folder) != 0)) {
2444                 folder_tree_destroy(folder);
2445                 item = folder_item_new(folder, folder->name, root_folder);
2446                 item->folder = folder;
2447                 folder->node = item->node = g_node_new(item);
2448         }
2449
2450         imap_scan_tree_recursive(session, FOLDER_ITEM(folder->node->data), subs_only);
2451         imap_create_missing_folders(folder);
2452
2453         return 0;
2454 }
2455
2456 static gint imap_scan_tree(Folder *folder)
2457 {
2458         gboolean subs_only = FALSE;
2459         if (folder->account) {
2460                 debug_print(" scanning only subs %d\n", folder->account->imap_subsonly);
2461                 subs_only = folder->account->imap_subsonly;
2462         }
2463         return imap_scan_tree_real(folder, subs_only);
2464 }
2465
2466 static gint imap_scan_tree_recursive(IMAPSession *session, FolderItem *item, gboolean subs_only)
2467 {
2468         Folder *folder;
2469         IMAPFolder *imapfolder;
2470         FolderItem *new_item;
2471         GSList *item_list, *cur;
2472         GNode *node;
2473         gchar *real_path;
2474         gchar *wildcard_path;
2475         gchar separator;
2476         gchar wildcard[3];
2477         clist * lep_list;
2478         int r = MAILIMAP_NO_ERROR;
2479
2480         g_return_val_if_fail(item != NULL, -1);
2481         g_return_val_if_fail(item->folder != NULL, -1);
2482         g_return_val_if_fail(item->no_sub == FALSE, -1);
2483
2484         folder = item->folder;
2485         imapfolder = IMAP_FOLDER(folder);
2486
2487         separator = imap_get_path_separator(session, imapfolder, item->path, &r);
2488         if (is_fatal(r))
2489                 return r;
2490
2491         if (folder->ui_func)
2492                 folder->ui_func(folder, item, folder->ui_func_data);
2493
2494         if (item->path) {
2495                 wildcard[0] = separator;
2496                 wildcard[1] = '%';
2497                 wildcard[2] = '\0';
2498                 real_path = imap_get_real_path(session, imapfolder, item->path, &r);
2499                 if (is_fatal(r)) {
2500                         g_free(real_path);
2501                         return r;
2502                 }
2503         } else {
2504                 wildcard[0] = '%';
2505                 wildcard[1] = '\0';
2506                 real_path = g_strdup("");
2507         }
2508
2509         Xstrcat_a(wildcard_path, real_path, wildcard,
2510                   {g_free(real_path); return MAILIMAP_ERROR_BAD_STATE;});
2511         lep_list = NULL;
2512
2513         if (subs_only)
2514                 r = imap_threaded_lsub(folder, "", wildcard_path, &lep_list);
2515         else
2516                 r = imap_threaded_list(folder, "", wildcard_path, &lep_list);
2517
2518         if (r != MAILIMAP_NO_ERROR) {
2519                 imap_handle_error(SESSION(session), NULL, r);
2520                 item_list = NULL;
2521                 g_free(real_path);
2522                 return r;
2523         }
2524         else {
2525                 item_list = imap_list_from_lep(imapfolder,
2526                                                lep_list, real_path, FALSE);
2527                 mailimap_list_result_free(lep_list);
2528         }
2529
2530         g_free(real_path);
2531
2532         node = item->node->children;
2533         while (node != NULL) {
2534                 FolderItem *old_item = FOLDER_ITEM(node->data);
2535                 GNode *next = node->next;
2536
2537                 new_item = NULL;
2538                 for (cur = item_list; cur != NULL; cur = cur->next) {
2539                         FolderItem *cur_item = FOLDER_ITEM(cur->data);
2540                         if (!strcmp2(old_item->path, cur_item->path)) {
2541                                 new_item = cur_item;
2542                                 break;
2543                         }
2544                 }
2545                 if (!new_item) {
2546                         if (old_item && old_item->path && !strcmp(old_item->path, "INBOX")) {
2547                                 debug_print("not removing INBOX\n");
2548                         } else {
2549                                 debug_print("folder '%s' not found. removing...\n",
2550                                             old_item->path);
2551                                 folder_item_remove(old_item);
2552                         }
2553                 } else {
2554                         old_item->no_sub = new_item->no_sub;
2555                         old_item->no_select = new_item->no_select;
2556                         if (old_item->no_sub == TRUE && node->children) {
2557                                 debug_print("folder '%s' doesn't have "
2558                                             "subfolders. removing...\n",
2559                                             old_item->path);
2560                                 folder_item_remove_children(old_item);
2561                         }
2562                 }
2563
2564                 node = next;
2565         }
2566
2567         for (cur = item_list; cur != NULL; cur = cur->next) {
2568                 FolderItem *cur_item = FOLDER_ITEM(cur->data);
2569                 new_item = NULL;
2570
2571                 for (node = item->node->children; node != NULL;
2572                      node = node->next) {
2573                         if (!strcmp2(FOLDER_ITEM(node->data)->path,
2574                                      cur_item->path)) {
2575                                 new_item = FOLDER_ITEM(node->data);
2576                                 folder_item_destroy(cur_item);
2577                                 cur_item = NULL;
2578                                 break;
2579                         }
2580                 }
2581                 if (!new_item) {
2582                         new_item = cur_item;
2583                         debug_print("new folder '%s' found.\n", new_item->path);
2584                         folder_item_append(item, new_item);
2585                 }
2586
2587                 if (!strcmp(new_item->path, "INBOX")) {
2588                         new_item->stype = F_INBOX;
2589                         folder->inbox = new_item;
2590                 } else if (!folder_item_parent(item) || item->stype == F_INBOX) {
2591                         gchar *base;
2592
2593                         base = g_path_get_basename(new_item->path);
2594
2595                         if (!folder->outbox && !g_ascii_strcasecmp(base, "Sent")) {
2596                                 new_item->stype = F_OUTBOX;
2597                                 folder->outbox = new_item;
2598                         } else if (!folder->draft && !g_ascii_strcasecmp(base, "Drafts")) {
2599                                 new_item->stype = F_DRAFT;
2600                                 folder->draft = new_item;
2601                         } else if (!folder->queue && !g_ascii_strcasecmp(base, "Queue")) {
2602                                 new_item->stype = F_QUEUE;
2603                                 folder->queue = new_item;
2604                         } else if (!folder->trash && !g_ascii_strcasecmp(base, "Trash")) {
2605                                 new_item->stype = F_TRASH;
2606                                 folder->trash = new_item;
2607                         }
2608                         g_free(base);
2609                 }
2610
2611                 if (new_item->no_sub == FALSE)
2612                         imap_scan_tree_recursive(session, new_item, subs_only);
2613         }
2614
2615         g_slist_free(item_list);
2616
2617         return MAILIMAP_NO_ERROR;
2618 }
2619
2620 GList *imap_scan_subtree(Folder *folder, FolderItem *item, gboolean unsubs_only, gboolean recursive)
2621 {
2622         IMAPSession *session = imap_session_get(folder);
2623         gchar *real_path;
2624         gchar *wildcard_path;
2625         gchar separator;
2626         gchar wildcard[3];
2627         clist * lep_list;
2628         GSList *item_list = NULL, *cur;
2629         GList *child_list = NULL, *tmplist = NULL;
2630         GSList *sub_list = NULL;
2631         int r = MAILIMAP_NO_ERROR;
2632
2633         if (!session)
2634                 return NULL;
2635
2636         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &r);
2637         if (is_fatal(r))
2638                 return NULL;
2639
2640         if (item->path) {
2641                 wildcard[0] = separator;
2642                 wildcard[1] = '%';
2643                 wildcard[2] = '\0';
2644                 real_path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &r);
2645                 if (is_fatal(r)) {
2646                         g_free(real_path);
2647                         return NULL;
2648                 }
2649         } else {
2650                 wildcard[0] = '%';
2651                 wildcard[1] = '\0';
2652                 real_path = g_strdup("");
2653         }
2654
2655         Xstrcat_a(wildcard_path, real_path, wildcard,
2656                   {g_free(real_path); return NULL;});
2657         lep_list = NULL;
2658
2659         if (unsubs_only)
2660                 statusbar_print_all(_("Looking for unsubscribed folders in %s..."),
2661                                 item->path?item->path:item->name);
2662         else
2663                 statusbar_print_all(_("Looking for subfolders of %s..."),
2664                                 item->path?item->path:item->name);
2665
2666         r = imap_threaded_list(folder, "", wildcard_path, &lep_list);
2667         if (r) {
2668                 g_free(real_path);
2669                 statusbar_pop_all();
2670                 return NULL;
2671         }
2672         item_list = imap_list_from_lep(IMAP_FOLDER(folder),
2673                                lep_list, real_path, FALSE);
2674         mailimap_list_result_free(lep_list);
2675
2676         for (cur = item_list; cur != NULL; cur = cur->next) {
2677                 FolderItem *cur_item = FOLDER_ITEM(cur->data);
2678                 if (recursive) {
2679                         tmplist = imap_scan_subtree(folder, cur_item,
2680                                         unsubs_only, recursive);
2681                         if (tmplist)
2682                                 child_list = g_list_concat(child_list, tmplist);
2683                 }
2684                 child_list = g_list_prepend(child_list,
2685                                 imap_get_real_path(session,
2686                                         IMAP_FOLDER(folder), cur_item->path, &r));
2687                 if (is_fatal(r)) {
2688                         g_free(real_path);
2689                         statusbar_pop_all();
2690                         return NULL;
2691                 }
2692                 folder_item_destroy(cur_item);
2693         }
2694         child_list = g_list_reverse(child_list);
2695         g_slist_free(item_list);
2696
2697         if (unsubs_only) {
2698                 r = imap_threaded_lsub(folder, "", wildcard_path, &lep_list);
2699                 if (r) {
2700                         g_free(real_path);
2701                         statusbar_pop_all();
2702                         return NULL;
2703                 }
2704                 sub_list = imap_list_from_lep(IMAP_FOLDER(folder),
2705                                        lep_list, real_path, FALSE);
2706                 mailimap_list_result_free(lep_list);
2707
2708                 for (cur = sub_list; cur != NULL; cur = cur->next) {
2709                         FolderItem *cur_item = FOLDER_ITEM(cur->data);
2710                         GList *oldlitem = NULL;
2711                         gchar *tmp = imap_get_real_path(session,
2712                                         IMAP_FOLDER(folder), cur_item->path, &r);
2713                         if (r) {
2714                                 g_free(real_path);
2715                                 statusbar_pop_all();
2716                                 return NULL;
2717                         }
2718                         folder_item_destroy(cur_item);
2719                         oldlitem = g_list_find_custom(
2720                                         child_list, tmp, (GCompareFunc)strcmp2);
2721                         if (oldlitem) {
2722                                 child_list = g_list_remove_link(child_list, oldlitem);
2723                                 g_free(oldlitem->data);
2724                                 g_list_free(oldlitem);
2725                         }
2726                         g_free(tmp);
2727                 }
2728         }
2729
2730         g_free(real_path);
2731         statusbar_pop_all();
2732
2733         return child_list;
2734 }
2735
2736 static gint imap_create_tree(Folder *folder)
2737 {
2738         g_return_val_if_fail(folder != NULL, -1);
2739         g_return_val_if_fail(folder->node != NULL, -1);
2740         g_return_val_if_fail(folder->node->data != NULL, -1);
2741         g_return_val_if_fail(folder->account != NULL, -1);
2742
2743         imap_scan_tree(folder);
2744         imap_create_missing_folders(folder);
2745
2746         return 0;
2747 }
2748
2749 static void imap_create_missing_folders(Folder *folder)
2750 {
2751         g_return_if_fail(folder != NULL);
2752
2753         if (!folder->inbox)
2754                 folder->inbox = imap_create_special_folder
2755                         (folder, F_INBOX, "INBOX");
2756         if (!folder->trash)
2757                 folder->trash = imap_create_special_folder
2758                         (folder, F_TRASH, "Trash");
2759         if (!folder->queue)
2760                 folder->queue = imap_create_special_folder
2761                         (folder, F_QUEUE, "Queue");
2762         if (!folder->outbox)
2763                 folder->outbox = imap_create_special_folder
2764                         (folder, F_OUTBOX, "Sent");
2765         if (!folder->draft)
2766                 folder->draft = imap_create_special_folder
2767                         (folder, F_DRAFT, "Drafts");
2768 }
2769
2770 static FolderItem *imap_create_special_folder(Folder *folder,
2771                                               SpecialFolderItemType stype,
2772                                               const gchar *name)
2773 {
2774         FolderItem *item;
2775         FolderItem *new_item;
2776
2777         g_return_val_if_fail(folder != NULL, NULL);
2778         g_return_val_if_fail(folder->node != NULL, NULL);
2779         g_return_val_if_fail(folder->node->data != NULL, NULL);
2780         g_return_val_if_fail(folder->account != NULL, NULL);
2781         g_return_val_if_fail(name != NULL, NULL);
2782
2783         item = FOLDER_ITEM(folder->node->data);
2784         new_item = imap_create_folder(folder, item, name);
2785
2786         if (!new_item) {
2787                 g_warning("Can't create '%s'\n", name);
2788                 if (!folder->inbox) return NULL;
2789
2790                 new_item = imap_create_folder(folder, folder->inbox, name);
2791                 if (!new_item)
2792                         g_warning("Can't create '%s' under INBOX\n", name);
2793                 else
2794                         new_item->stype = stype;
2795         } else
2796                 new_item->stype = stype;
2797
2798         return new_item;
2799 }
2800
2801 static gchar *imap_folder_get_path(Folder *folder)
2802 {
2803         gchar *folder_path;
2804
2805         g_return_val_if_fail(folder != NULL, NULL);
2806         g_return_val_if_fail(folder->account != NULL, NULL);
2807
2808         folder_path = g_strconcat(get_imap_cache_dir(),
2809                                   G_DIR_SEPARATOR_S,
2810                                   folder->account->recv_server,
2811                                   G_DIR_SEPARATOR_S,
2812                                   folder->account->userid,
2813                                   NULL);
2814
2815         return folder_path;
2816 }
2817
2818 #ifdef G_OS_WIN32
2819 static gchar *imap_encode_unsafe_chars(const gchar *str)
2820 {
2821         gchar *ret = NULL, *o_ret;
2822         gchar *i;
2823         if (!str)
2824                 return NULL;
2825         ret = g_malloc(3*strlen(str)+1);
2826         o_ret = ret;
2827         for (i = str; *i; i++) {
2828                 switch(*i) {
2829                         case ':':
2830                         case '|':
2831                         case '<':
2832                         case '>':
2833                         case '*':
2834                         case '?':
2835                         case '#':
2836                                 *ret++ = '%';
2837                                 *ret++ = '0'+(*i/10);
2838                                 *ret++ = '0'+(*i%10);
2839                                 break;
2840                         default:
2841                                 *ret++ = *i;
2842                 }
2843         }
2844         *ret++ = '\0';
2845         return o_ret;
2846 }
2847 #endif
2848 static gchar *imap_item_get_path(Folder *folder, FolderItem *item)
2849 {
2850         gchar *folder_path, *path;
2851         gchar *item_path = NULL;
2852
2853         g_return_val_if_fail(folder != NULL, NULL);
2854         g_return_val_if_fail(item != NULL, NULL);
2855         folder_path = imap_folder_get_path(folder);
2856
2857         g_return_val_if_fail(folder_path != NULL, NULL);
2858
2859 #ifdef G_OS_UNIX
2860         item_path = g_strdup(item->path);
2861 #else
2862         item_path = imap_encode_unsafe_chars(item->path);
2863 #endif
2864
2865         if (g_path_is_absolute(folder_path)) {
2866                 if (item_path)
2867                         path = g_strconcat(folder_path, G_DIR_SEPARATOR_S,
2868                                            item_path, NULL);
2869                 else
2870                         path = g_strdup(folder_path);
2871         } else {
2872                 if (item_path)
2873                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
2874                                            folder_path, G_DIR_SEPARATOR_S,
2875                                            item_path, NULL);
2876                 else
2877                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
2878                                            folder_path, NULL);
2879         }
2880         g_free(folder_path);
2881         g_free(item_path);
2882 #ifdef G_OS_WIN32
2883         while (strchr(path, '/'))
2884                 *strchr(path, '/') = '\\';
2885 #endif
2886
2887         return path;
2888 }
2889
2890 static FolderItem *imap_create_folder(Folder *folder, FolderItem *parent,
2891                                const gchar *name)
2892 {
2893         gchar *dirpath, *imap_path;
2894         IMAPSession *session;
2895         FolderItem *new_item;
2896         gchar separator;
2897         gchar *new_name;
2898         const gchar *p;
2899         gint ok = MAILIMAP_NO_ERROR;
2900         gboolean no_select = FALSE, no_sub = FALSE;
2901         gboolean exist = FALSE;
2902
2903         g_return_val_if_fail(folder != NULL, NULL);
2904         g_return_val_if_fail(folder->account != NULL, NULL);
2905         g_return_val_if_fail(parent != NULL, NULL);
2906         g_return_val_if_fail(name != NULL, NULL);
2907
2908         debug_print("getting session...\n");
2909         session = imap_session_get(folder);
2910         if (!session) {
2911                 return NULL;
2912         }
2913
2914         if (!folder_item_parent(parent) && strcmp(name, "INBOX") == 0) {
2915                 dirpath = g_strdup(name);
2916         }else if (parent->path)
2917                 dirpath = g_strconcat(parent->path, "/", name, NULL);
2918         else if ((p = strchr(name, '/')) != NULL && *(p + 1) != '\0')
2919                 dirpath = g_strdup(name);
2920         else if (folder->account->imap_dir && *folder->account->imap_dir) {
2921                 gchar *imap_dir;
2922
2923                 Xstrdup_a(imap_dir, folder->account->imap_dir, {return NULL;});
2924                 strtailchomp(imap_dir, '/');
2925                 dirpath = g_strconcat(imap_dir, "/", name, NULL);
2926         } else
2927                 dirpath = g_strdup(name);
2928
2929
2930
2931         /* keep trailing directory separator to create a folder that contains
2932            sub folder */
2933         imap_path = imap_utf8_to_modified_utf7(dirpath, FALSE);
2934
2935         strtailchomp(dirpath, '/');
2936         Xstrdup_a(new_name, name, {
2937                 g_free(dirpath);
2938                 g_free(imap_path);
2939                 return NULL;});
2940
2941         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), imap_path, &ok);
2942         if (is_fatal(ok)) {
2943                 g_free(imap_path);
2944                 return NULL;
2945         }
2946         imap_path_separator_subst(imap_path, separator);
2947         /* remove trailing / for display */
2948         strtailchomp(new_name, '/');
2949
2950         if (strcmp(dirpath, "INBOX") != 0) {
2951                 GPtrArray *argbuf;
2952                 int r;
2953                 clist * lep_list;
2954
2955                 argbuf = g_ptr_array_new();
2956                 r = imap_threaded_list(folder, "", imap_path, &lep_list);
2957                 if (r != MAILIMAP_NO_ERROR) {
2958                         imap_handle_error(SESSION(session), NULL, r);
2959                         log_warning(LOG_PROTOCOL, _("can't create mailbox: LIST failed\n"));
2960                         g_free(imap_path);
2961                         g_free(dirpath);
2962                         ptr_array_free_strings(argbuf);
2963                         g_ptr_array_free(argbuf, TRUE);
2964                         return NULL;
2965                 }
2966
2967                 if (clist_count(lep_list) > 0)
2968                         exist = TRUE;
2969                 mailimap_list_result_free(lep_list);
2970                 lep_list = NULL;
2971                 if (!exist) {
2972                         ok = imap_cmd_create(session, imap_path);
2973                         if (ok != MAILIMAP_NO_ERROR) {
2974                                 log_warning(LOG_PROTOCOL, _("can't create mailbox\n"));
2975                                 g_free(imap_path);
2976                                 g_free(dirpath);
2977                                 return NULL;
2978                         }
2979                         r = imap_threaded_list(folder, "", imap_path, &lep_list);
2980                         if (r == MAILIMAP_NO_ERROR) {
2981                                 GSList *item_list = imap_list_from_lep(IMAP_FOLDER(folder),
2982                                                lep_list, dirpath, TRUE);
2983                                 if (item_list) {
2984                                         FolderItem *cur_item = FOLDER_ITEM(item_list->data);
2985                                         no_select = cur_item->no_select;
2986                                         no_sub = cur_item->no_sub;
2987                                         g_slist_free(item_list);
2988                                 }
2989                                 mailimap_list_result_free(lep_list);
2990                         } else {
2991                                 imap_handle_error(SESSION(session), NULL, r);
2992                         }
2993                 }
2994                 imap_threaded_subscribe(folder, imap_path, TRUE);
2995         } else {
2996                 clist *lep_list;
2997                 int r;
2998                 /* just get flags */
2999                 r = imap_threaded_list(folder, "", "INBOX", &lep_list);
3000                 if (r == MAILIMAP_NO_ERROR) {
3001                         GSList *item_list = imap_list_from_lep(IMAP_FOLDER(folder),
3002                                        lep_list, dirpath, TRUE);
3003                         if (item_list) {
3004                                 FolderItem *cur_item = FOLDER_ITEM(item_list->data);
3005                                 no_select = cur_item->no_select;
3006                                 no_sub = cur_item->no_sub;
3007                                 g_slist_free(item_list);
3008                         }
3009                         mailimap_list_result_free(lep_list);
3010                 } else {
3011                         imap_handle_error(SESSION(session), NULL, r);
3012                 }
3013         }
3014
3015         new_item = folder_item_new(folder, new_name, dirpath);
3016         new_item->no_select = no_select;
3017         new_item->no_sub = no_sub;
3018         folder_item_append(parent, new_item);
3019         g_free(imap_path);
3020         g_free(dirpath);
3021
3022         dirpath = folder_item_get_path(new_item);
3023         if (!is_dir_exist(dirpath))
3024                 make_dir_hier(dirpath);
3025         g_free(dirpath);
3026
3027         if (exist) {
3028                 /* folder existed, scan it */
3029                 imap_scan_required(folder, new_item);
3030                 folder_item_scan_full(new_item, FALSE);
3031         }
3032
3033         return new_item;
3034 }
3035
3036 static gint imap_rename_folder(Folder *folder, FolderItem *item,
3037                                const gchar *name)
3038 {
3039         gchar *dirpath;
3040         gchar *newpath;
3041         gchar *real_oldpath;
3042         gchar *real_newpath;
3043         gchar *paths[2];
3044         gchar *old_cache_dir;
3045         gchar *new_cache_dir;
3046         IMAPSession *session;
3047         gchar separator;
3048         gint ok = MAILIMAP_NO_ERROR;
3049         gint exists, recent, unseen;
3050         guint32 uid_validity;
3051
3052         g_return_val_if_fail(folder != NULL, -1);
3053         g_return_val_if_fail(item != NULL, -1);
3054         g_return_val_if_fail(item->path != NULL, -1);
3055         g_return_val_if_fail(name != NULL, -1);
3056
3057         debug_print("getting session...\n");
3058         session = imap_session_get(folder);
3059         if (!session) {
3060                 return -1;
3061         }
3062
3063         if (strchr(name, imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &ok)) != NULL ||
3064                 is_fatal(ok)) {
3065                 g_warning(_("New folder name must not contain the namespace "
3066                             "path separator"));
3067                 return -1;
3068         }
3069
3070         real_oldpath = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &ok);
3071         if (is_fatal(ok)) {
3072                 return -1;
3073         }
3074
3075         g_free(session->mbox);
3076         session->mbox = NULL;
3077         session->exists = 0;
3078         session->recent = 0;
3079         session->expunge = 0;
3080         ok = imap_cmd_examine(session, "INBOX",
3081                               &exists, &recent, &unseen, &uid_validity, FALSE);
3082         if (ok != MAILIMAP_NO_ERROR) {
3083                 g_free(real_oldpath);
3084                 return -1;
3085         }
3086
3087         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &ok);
3088         if (is_fatal(ok))
3089                 return -1;
3090         if (strchr(item->path, G_DIR_SEPARATOR)) {
3091                 dirpath = g_path_get_dirname(item->path);
3092                 newpath = g_strconcat(dirpath, G_DIR_SEPARATOR_S, name, NULL);
3093                 g_free(dirpath);
3094         } else
3095                 newpath = g_strdup(name);
3096
3097         real_newpath = imap_utf8_to_modified_utf7(newpath, FALSE);
3098         imap_path_separator_subst(real_newpath, separator);
3099
3100         ok = imap_cmd_rename(session, real_oldpath, real_newpath);
3101         if (ok != MAILIMAP_NO_ERROR) {
3102                 log_warning(LOG_PROTOCOL, _("can't rename mailbox: %s to %s\n"),
3103                             real_oldpath, real_newpath);
3104                 g_free(real_oldpath);
3105                 g_free(newpath);
3106                 g_free(real_newpath);
3107                 return -1;
3108         }
3109         g_free(item->name);
3110         item->name = g_strdup(name);
3111
3112         old_cache_dir = folder_item_get_path(item);
3113
3114         paths[0] = g_strdup(item->path);
3115         paths[1] = newpath;
3116         g_node_traverse(item->node, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
3117                         imap_rename_folder_func, paths);
3118
3119         if (is_dir_exist(old_cache_dir)) {
3120                 new_cache_dir = folder_item_get_path(item);
3121                 if (g_rename(old_cache_dir, new_cache_dir) < 0) {
3122                         FILE_OP_ERROR(old_cache_dir, "rename");
3123                 }
3124                 g_free(new_cache_dir);
3125         }
3126
3127         g_free(old_cache_dir);
3128         g_free(paths[0]);
3129         g_free(newpath);
3130         g_free(real_oldpath);
3131         g_free(real_newpath);
3132         return 0;
3133 }
3134
3135 gint imap_subscribe(Folder *folder, FolderItem *item, gchar *rpath, gboolean sub)
3136 {
3137         gchar *path;
3138         gint r = MAILIMAP_NO_ERROR;
3139         IMAPSession *session;
3140         debug_print("getting session...\n");
3141
3142         session = imap_session_get(folder);
3143         if (!session) {
3144                 return -1;
3145         }
3146         if (item && item->path) {
3147                 path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &r);
3148                 if (!path)
3149                         return -1;
3150                 if (is_fatal(r)) {
3151                         g_free(path);
3152                         return -1;
3153                 }
3154                 if (!strcmp(path, "INBOX") && sub == FALSE) {
3155                         g_free(path);
3156                         return -1;
3157                 }
3158                 debug_print("%ssubscribing %s\n", sub?"":"un", path);
3159                 r = imap_threaded_subscribe(folder, path, sub);
3160                 g_free(path);
3161         } else if (rpath) {
3162                 r = imap_threaded_subscribe(folder, rpath, sub);
3163         } else
3164                 return -1;
3165         return r;
3166 }
3167
3168 static gint imap_remove_folder_real(Folder *folder, FolderItem *item)
3169 {
3170         gint ok = MAILIMAP_NO_ERROR;
3171         IMAPSession *session;
3172         gchar *path;
3173         gchar *cache_dir;
3174         gboolean selected_folder;
3175
3176         g_return_val_if_fail(folder != NULL, -1);
3177         g_return_val_if_fail(item != NULL, -1);
3178         g_return_val_if_fail(item->path != NULL, -1);
3179
3180         debug_print("getting session...\n");
3181         session = imap_session_get(folder);
3182         if (!session) {
3183                 return -1;
3184         }
3185         path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &ok);
3186         if (is_fatal(ok))
3187                 return -1;
3188
3189         imap_threaded_subscribe(folder, path, FALSE);
3190
3191         selected_folder = (session->mbox != NULL) &&
3192                           (!strcmp(session->mbox, item->path));
3193         if (selected_folder) {
3194                 ok = imap_cmd_close(session);
3195                 if (ok != MAILIMAP_NO_ERROR) {
3196                         debug_print("close err %d\n", ok);
3197                         return ok;
3198                 }
3199         }
3200         ok = imap_cmd_delete(session, path);
3201         if (ok != MAILIMAP_NO_ERROR && !is_fatal(ok)) {
3202                 gchar *tmp = NULL;
3203
3204                 ok = MAILIMAP_NO_ERROR;
3205                 tmp = g_strdup_printf("%s%c", path,
3206                                 imap_get_path_separator(session, IMAP_FOLDER(folder), path, &ok));
3207                 g_free(path);
3208                 path = tmp;
3209                 if (!is_fatal(ok))
3210                         ok = imap_cmd_delete(session, path);
3211         }
3212
3213         if (ok != MAILIMAP_NO_ERROR) {
3214                 log_warning(LOG_PROTOCOL, _("can't delete mailbox\n"));
3215                 g_free(path);
3216                 return -1;
3217         }
3218
3219         g_free(path);
3220         cache_dir = folder_item_get_path(item);
3221         if (is_dir_exist(cache_dir) && remove_dir_recursive(cache_dir) < 0)
3222                 g_warning("can't remove directory '%s'\n", cache_dir);
3223         g_free(cache_dir);
3224         folder_item_remove(item);
3225         return 0;
3226 }
3227
3228 static gint imap_remove_folder(Folder *folder, FolderItem *item)
3229 {
3230         GNode *node, *next;
3231
3232         g_return_val_if_fail(item != NULL, -1);
3233         g_return_val_if_fail(item->folder != NULL, -1);
3234         g_return_val_if_fail(item->node != NULL, -1);
3235
3236         node = item->node->children;
3237         while (node != NULL) {
3238                 next = node->next;
3239                 if (imap_remove_folder(folder, FOLDER_ITEM(node->data)) < 0)
3240                         return -1;
3241                 node = next;
3242         }
3243         debug_print("IMAP removing %s\n", item->path);
3244
3245         if (imap_remove_all_msg(folder, item) < 0)
3246                 return -1;
3247         return imap_remove_folder_real(folder, item);
3248 }
3249
3250 typedef struct _uncached_data {
3251         IMAPSession *session;
3252         FolderItem *item;
3253         MsgNumberList *numlist;
3254         guint cur;
3255         guint total;
3256         gboolean done;
3257         int ok;
3258 } uncached_data;
3259
3260 static void *imap_get_uncached_messages_thread(void *data)
3261 {
3262         uncached_data *stuff = (uncached_data *)data;
3263         IMAPSession *session = stuff->session;
3264         FolderItem *item = stuff->item;
3265         MsgNumberList *numlist = stuff->numlist;
3266         GSList *newlist = NULL;
3267         GSList *llast = NULL;
3268         GSList *seq_list, *cur;
3269         gboolean got_alien_tags = FALSE;
3270
3271         debug_print("uncached_messages\n");
3272
3273         if (session == NULL || item == NULL || item->folder == NULL
3274             || FOLDER_CLASS(item->folder) != &imap_class) {
3275                 stuff->done = TRUE;
3276                 return NULL;
3277         }
3278
3279         seq_list = imap_get_lep_set_from_numlist(IMAP_FOLDER(item->folder), numlist);
3280         debug_print("get msgs info\n");
3281         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
3282                 struct mailimap_set * imapset;
3283                 unsigned int i;
3284                 int r;
3285                 carray * env_list;
3286                 int count;
3287
3288                 if (session->cancelled)
3289                         break;
3290
3291                 imapset = cur->data;
3292
3293                 r = imap_threaded_fetch_env(session->folder,
3294                                             imapset, &env_list);
3295                 if (r != MAILIMAP_NO_ERROR) {
3296                         imap_handle_error(SESSION(session), NULL, r);
3297                         if (is_fatal(r)) {
3298                                 stuff->ok = r;
3299                                 return NULL;
3300                         }
3301                         continue;
3302                 }
3303
3304                 session_set_access_time(SESSION(session));
3305
3306                 count = 0;
3307                 for(i = 0 ; i < carray_count(env_list) ; i += 2) {
3308                         struct imap_fetch_env_info * info;
3309                         MsgInfo * msginfo;
3310                         GSList *tags = NULL, *cur = NULL;
3311                         info = carray_get(env_list, i);
3312                         tags = carray_get(env_list, i+1);
3313                         msginfo = imap_envelope_from_lep(info, item);
3314                         if (msginfo == NULL) {
3315                                 slist_free_strings(tags);
3316                                 g_slist_free(tags);
3317                                 continue;
3318                         }
3319                         g_slist_free(msginfo->tags);
3320                         msginfo->tags = NULL;
3321
3322                         for (cur = tags; cur; cur = cur->next) {
3323                                 gchar *real_tag = imap_modified_utf7_to_utf8(cur->data, TRUE);
3324                                 gint id = 0;
3325                                 id = tags_get_id_for_str(real_tag);
3326                                 if (id == -1) {
3327                                         id = tags_add_tag(real_tag);
3328                                         got_alien_tags = TRUE;
3329                                 }
3330                                 if (!g_slist_find(msginfo->tags, GINT_TO_POINTER(id))) {
3331                                         msginfo->tags = g_slist_prepend(
3332                                                         msginfo->tags,
3333                                                         GINT_TO_POINTER(id));
3334                                 }
3335                                 g_free(real_tag);
3336                         }
3337                         if (msginfo->tags)
3338                                 msginfo->tags = g_slist_reverse(msginfo->tags);
3339                         slist_free_strings(tags);
3340                         g_slist_free(tags);
3341                         msginfo->folder = item;
3342                         if (!newlist)
3343                                 llast = newlist = g_slist_append(newlist, msginfo);
3344                         else {
3345                                 llast = g_slist_append(llast, msginfo);
3346                                 llast = llast->next;
3347                         }
3348                         count ++;
3349                 }
3350
3351                 imap_fetch_env_free(env_list);
3352         }
3353
3354         if (got_alien_tags) {
3355                 tags_write_tags();
3356                 main_window_reflect_tags_changes(mainwindow_get_mainwindow());
3357         }
3358
3359         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
3360                 struct mailimap_set * imapset;
3361
3362                 imapset = cur->data;
3363                 mailimap_set_free(imapset);
3364         }
3365
3366         session_set_access_time(SESSION(session));
3367         stuff->done = TRUE;
3368         return newlist;
3369 }
3370
3371 #define MAX_MSG_NUM 50
3372
3373 static GSList *imap_get_uncached_messages(IMAPSession *session,
3374                                         FolderItem *item,
3375                                         MsgNumberList *numlist,
3376                                         int *r)
3377 {
3378         GSList *result = NULL;
3379         GSList * cur;
3380         uncached_data *data = g_new0(uncached_data, 1);
3381
3382         cur = numlist;
3383         data->total = g_slist_length(numlist);
3384         data->ok = MAILIMAP_NO_ERROR;
3385         debug_print("messages list : %i\n", data->total);
3386
3387         while (cur != NULL) {
3388                 GSList * partial_result;
3389                 int count;
3390                 GSList * newlist;
3391                 GSList * llast;
3392
3393                 llast = NULL;
3394                 count = 0;
3395                 newlist = NULL;
3396                 while (count < MAX_MSG_NUM) {
3397                         void * p;
3398
3399                         p = cur->data;
3400
3401                         if (newlist == NULL)
3402                                 llast = newlist = g_slist_append(newlist, p);
3403                         else {
3404                                 llast = g_slist_append(llast, p);
3405                                 llast = llast->next;
3406                         }
3407                         count ++;
3408
3409                         cur = cur->next;
3410                         if (cur == NULL)
3411                                 break;
3412                 }
3413
3414                 data->done = FALSE;
3415                 data->session = session;
3416                 data->item = item;
3417                 data->numlist = newlist;
3418                 data->cur += count;
3419
3420                 if (prefs_common.work_offline &&
3421                     !inc_offline_should_override(FALSE,
3422                         _("Claws Mail needs network access in order "
3423                           "to access the IMAP server."))) {
3424                         g_free(data);
3425                         return NULL;
3426                 }
3427
3428                 partial_result =
3429                         (GSList *)imap_get_uncached_messages_thread(data);
3430                 *r = data->ok;
3431                 if (data->ok != MAILIMAP_NO_ERROR) {
3432                         goto bail;
3433                 }
3434                 statusbar_progress_all(data->cur,data->total, 1);
3435
3436                 g_slist_free(newlist);
3437
3438                 result = g_slist_concat(result, partial_result);
3439         }
3440 bail:
3441         g_free(data);
3442
3443         statusbar_progress_all(0,0,0);
3444         statusbar_pop_all();
3445
3446         return result;
3447 }
3448
3449 static void imap_delete_all_cached_messages(FolderItem *item)
3450 {
3451         gchar *dir;
3452
3453         g_return_if_fail(item != NULL);
3454         g_return_if_fail(item->folder != NULL);
3455         g_return_if_fail(FOLDER_CLASS(item->folder) == &imap_class);
3456
3457         debug_print("Deleting all cached messages...\n");
3458
3459         dir = folder_item_get_path(item);
3460         if (is_dir_exist(dir))
3461                 remove_all_numbered_files(dir);
3462         g_free(dir);
3463
3464         debug_print("done.\n");
3465 }
3466
3467 gchar imap_get_path_separator_for_item(FolderItem *item)
3468 {
3469         Folder *folder = NULL;
3470         IMAPFolder *imap_folder = NULL;
3471         IMAPSession *session = NULL;
3472         gchar result = '/';
3473         gint ok = MAILIMAP_NO_ERROR;
3474         if (!item)
3475                 return '/';
3476         folder = item->folder;
3477
3478         if (!folder)
3479                 return '/';
3480
3481         imap_folder = IMAP_FOLDER(folder);
3482
3483         if (!imap_folder)
3484                 return '/';
3485
3486         debug_print("getting session...");
3487         session = imap_session_get(FOLDER(folder));
3488         result = imap_get_path_separator(session, imap_folder, item->path, &ok);
3489         return result;
3490 }
3491
3492 static gchar imap_refresh_path_separator(IMAPSession *session, IMAPFolder *folder, const gchar *subfolder, gint *ok)
3493 {
3494         clist * lep_list;
3495         int r;
3496         gchar separator = '\0';
3497
3498         g_return_val_if_fail(session != NULL, '/');
3499         r = imap_threaded_list((Folder *)folder, "", subfolder, &lep_list);
3500
3501         if (r != MAILIMAP_NO_ERROR) {
3502                 imap_handle_error(SESSION(session), NULL, r);
3503                 log_warning(LOG_PROTOCOL, _("LIST failed\n"));
3504                 *ok = r;
3505                 return '\0';
3506         }
3507
3508         if (lep_list != NULL && clist_count(lep_list) > 0) {
3509                 clistiter * iter = clist_begin(lep_list);
3510                 struct mailimap_mailbox_list * mb;
3511                 mb = clist_content(iter);
3512
3513                 separator = mb->mb_delimiter;
3514                 debug_print("got separator: %c\n", folder->last_seen_separator);
3515         }
3516         *ok = MAILIMAP_NO_ERROR;
3517         mailimap_list_result_free(lep_list);
3518         return separator;
3519 }
3520
3521 static gchar imap_get_path_separator(IMAPSession *session, IMAPFolder *folder, const gchar *path, gint *ok)
3522 {
3523         gchar separator = '/';
3524         *ok = MAILIMAP_NO_ERROR;
3525         if (folder->last_seen_separator == 0) {
3526                 folder->last_seen_separator = imap_refresh_path_separator(session, folder, "", ok);
3527         }
3528
3529         if (folder->last_seen_separator == 0) {
3530                 folder->last_seen_separator = imap_refresh_path_separator(session, folder, "INBOX", ok);
3531         }
3532
3533         if (folder->last_seen_separator != 0) {
3534                 debug_print("using separator: %c\n", folder->last_seen_separator);
3535                 return folder->last_seen_separator;
3536         }
3537
3538         return separator;
3539 }
3540
3541 static gchar *imap_get_real_path(IMAPSession *session, IMAPFolder *folder, const gchar *path, gint *ok)
3542 {
3543         gchar *real_path = NULL;
3544         gchar separator;
3545
3546         g_return_val_if_fail(folder != NULL, NULL);
3547         g_return_val_if_fail(path != NULL, NULL);
3548
3549         *ok = MAILIMAP_NO_ERROR;
3550
3551         real_path = imap_utf8_to_modified_utf7(path, FALSE);
3552         separator = imap_get_path_separator(session, folder, path, ok);
3553         if (*ok == MAILIMAP_NO_ERROR)
3554                 imap_path_separator_subst(real_path, separator);
3555
3556         return real_path;
3557 }
3558
3559 static gint imap_set_message_flags(IMAPSession *session,
3560                                    IMAPFolderItem *item,
3561                                    MsgNumberList *numlist,
3562                                    IMAPFlags flags,
3563                                    GSList *tags,
3564                                    gboolean is_set)
3565 {
3566         gint ok = 0;
3567         GSList *seq_list;
3568         GSList * cur;
3569         gint total = 0;
3570         IMAPFolder *folder = NULL;
3571         GSList *sorted_list = NULL;
3572
3573         if (numlist == NULL || session == NULL)
3574                 return MAILIMAP_ERROR_BAD_STATE;
3575
3576         folder = IMAP_FOLDER(session->folder);
3577
3578         sorted_list = g_slist_copy(numlist);
3579         sorted_list = g_slist_sort(sorted_list, g_int_compare);
3580
3581         cur = g_slist_last(sorted_list);
3582
3583         if (cur)
3584                 total = GPOINTER_TO_INT(cur->data);
3585
3586         seq_list = imap_get_lep_set_from_numlist(IMAP_FOLDER(session->folder), sorted_list);
3587
3588         statusbar_print_all(_("Flagging messages..."));
3589
3590         for(cur = seq_list ; cur != NULL ; cur = g_slist_next(cur)) {
3591                 struct mailimap_set * imapset = (struct mailimap_set *)cur->data;
3592                 struct mailimap_set_item *set_item = NULL;
3593
3594                 if (imapset->set_list)
3595                         set_item = clist_content(clist_begin(imapset->set_list));
3596                 else
3597                         continue;
3598
3599                 if (set_item == NULL)
3600                         continue;
3601
3602                 statusbar_progress_all(set_item->set_first, total, 1);
3603
3604                 ok = imap_cmd_store(session, item, imapset,
3605                                     flags, tags, is_set);
3606                 statusbar_progress_all(set_item->set_last, total, 1);
3607                 if (ok != MAILIMAP_NO_ERROR && folder->max_set_size > 20) {
3608                         /* reduce max set size */
3609                         folder->max_set_size /= 2;
3610                 }
3611                 if (ok != MAILIMAP_NO_ERROR && is_fatal(ok)) {
3612                         break;
3613                 }
3614         }
3615
3616         g_slist_free(sorted_list);
3617
3618         statusbar_progress_all(0,0,0);
3619         statusbar_pop_all();
3620
3621         imap_lep_set_free(seq_list);
3622
3623         return ok;
3624 }
3625
3626 typedef struct _select_data {
3627         IMAPSession *session;
3628         gchar *real_path;
3629         gint *exists;
3630         gint *recent;
3631         gint *unseen;
3632         guint32 *uid_validity;
3633         gboolean done;
3634 } select_data;
3635
3636 static gint imap_select(IMAPSession *session, IMAPFolder *folder,
3637                         FolderItem *item,
3638                         gint *exists, gint *recent, gint *unseen,
3639                         guint32 *uid_validity, gint *can_create_flags,
3640                         gboolean block)
3641 {
3642         gchar *real_path;
3643         gint ok = MAILIMAP_NO_ERROR;
3644         gint exists_, recent_, unseen_;
3645         guint32 uid_validity_;
3646         gint can_create_flags_;
3647         const gchar *path = item ? item->path:NULL;
3648
3649         if (!item) {
3650                 return MAILIMAP_ERROR_BAD_STATE;
3651         }
3652
3653         if (!exists && !recent && !unseen && !uid_validity && !can_create_flags) {
3654                 if (session->mbox && strcmp(session->mbox, path) == 0)
3655                         return MAILIMAP_NO_ERROR;
3656         }
3657         if (!exists && !recent && !unseen && !uid_validity && can_create_flags) {
3658                 if (session->mbox && strcmp(session->mbox, path) == 0) {
3659                         if (IMAP_FOLDER_ITEM(item)->can_create_flags != ITEM_CAN_CREATE_FLAGS_UNKNOWN)
3660                                 return MAILIMAP_NO_ERROR;
3661                 }
3662         }
3663         if (!exists)
3664                 exists = &exists_;
3665         if (!recent)
3666                 recent = &recent_;
3667         if (!unseen)
3668                 unseen = &unseen_;
3669         if (!uid_validity)
3670                 uid_validity = &uid_validity_;
3671         if (!can_create_flags)
3672                 can_create_flags = &can_create_flags_;
3673
3674         g_free(session->mbox);
3675         session->mbox = NULL;
3676         session->exists = 0;
3677         session->recent = 0;
3678         session->expunge = 0;
3679
3680         real_path = imap_get_real_path(session, folder, path, &ok);
3681         if (is_fatal(ok))
3682                 return ok;
3683         g_slist_free(IMAP_FOLDER_ITEM(item)->ok_flags);
3684         IMAP_FOLDER_ITEM(item)->ok_flags = NULL;
3685         ok = imap_cmd_select(session, real_path,
3686                              exists, recent, unseen, uid_validity, can_create_flags,
3687                              &(IMAP_FOLDER_ITEM(item)->ok_flags), block);
3688         if (ok != MAILIMAP_NO_ERROR) {
3689                 log_warning(LOG_PROTOCOL, _("can't select folder: %s\n"), real_path);
3690         } else {
3691                 session->mbox = g_strdup(path);
3692                 session->folder_content_changed = FALSE;
3693                 session->exists = *exists;
3694                 session->recent = *recent;
3695                 session->expunge = 0;
3696                 session->unseen = *unseen;
3697                 session->uid_validity = *uid_validity;
3698                 debug_print("select: exists %d recent %d expunge %d uid_validity %d can_create_flags %d\n",
3699                         session->exists, session->recent, session->expunge,
3700                         session->uid_validity, *can_create_flags);
3701         }
3702         if (*can_create_flags) {
3703                 IMAP_FOLDER_ITEM(item)->can_create_flags = ITEM_CAN_CREATE_FLAGS;
3704         } else {
3705                 IMAP_FOLDER_ITEM(item)->can_create_flags = ITEM_CANNOT_CREATE_FLAGS;
3706         }
3707         g_free(real_path);
3708
3709         return ok;
3710 }
3711
3712 static gint imap_status(IMAPSession *session, IMAPFolder *folder,
3713                         const gchar *path, IMAPFolderItem *item,
3714                         gint *messages,
3715                         guint32 *uid_next, guint32 *uid_validity,
3716                         gint *unseen, gboolean block)
3717 {
3718         int r = MAILIMAP_NO_ERROR;
3719         clistiter * iter;
3720         struct mailimap_mailbox_data_status * data_status;
3721         int got_values;
3722         gchar *real_path;
3723         guint mask = 0;
3724
3725         real_path = imap_get_real_path(session, folder, path, &r);
3726         if (is_fatal(r)) {
3727                 g_free(real_path);
3728                 return r;
3729         }
3730         if (messages) {
3731                 mask |= 1 << 0;
3732                 *messages = 0;
3733         }
3734         if (uid_next) {
3735                 mask |= 1 << 2;
3736                 *uid_next = 0;
3737         }
3738         if (uid_validity) {
3739                 mask |= 1 << 3;
3740                 *uid_validity = 0;
3741         }
3742         if (unseen) {
3743                 mask |= 1 << 4;
3744                 *unseen = 0;
3745         }
3746
3747         if (session->mbox != NULL &&
3748             !strcmp(session->mbox, item->item.path)) {
3749                 r = imap_cmd_close(session);
3750                 if (r != MAILIMAP_NO_ERROR) {
3751                         debug_print("close err %d\n", r);
3752                         g_free(real_path);
3753                         return r;
3754                 }
3755         }
3756
3757         r = imap_threaded_status(FOLDER(folder), real_path,
3758                 &data_status, mask);
3759
3760         g_free(real_path);
3761         if (r != MAILIMAP_NO_ERROR) {
3762                 imap_handle_error(SESSION(session), NULL, r);
3763                 debug_print("status err %d\n", r);
3764                 return r;
3765         }
3766
3767         if (data_status == NULL || data_status->st_info_list == NULL) {
3768                 debug_print("data_status %p\n", data_status);
3769                 if (data_status) {
3770                         debug_print("data_status->st_info_list %p\n", data_status->st_info_list);
3771                         mailimap_mailbox_data_status_free(data_status);
3772                 }
3773                 return MAILIMAP_ERROR_BAD_STATE;
3774         }
3775
3776         got_values = 0;
3777         if (data_status->st_info_list) {
3778                 for(iter = clist_begin(data_status->st_info_list) ; iter != NULL ;
3779                     iter = clist_next(iter)) {
3780                         struct mailimap_status_info * info;
3781
3782                         info = clist_content(iter);
3783                         switch (info->st_att) {
3784                         case MAILIMAP_STATUS_ATT_MESSAGES:
3785                                 if (messages) {
3786                                         * messages = info->st_value;
3787                                         got_values |= 1 << 0;
3788                                 }
3789                                 break;
3790
3791                         case MAILIMAP_STATUS_ATT_UIDNEXT:
3792                                 if (uid_next) {
3793                                         * uid_next = info->st_value;
3794                                         got_values |= 1 << 2;
3795                                 }
3796                                 break;
3797
3798                         case MAILIMAP_STATUS_ATT_UIDVALIDITY:
3799                                 if (uid_validity) {
3800                                         * uid_validity = info->st_value;
3801                                         got_values |= 1 << 3;
3802                                 }
3803                                 break;
3804
3805                         case MAILIMAP_STATUS_ATT_UNSEEN:
3806                                 if (unseen) {
3807                                         * unseen = info->st_value;
3808                                         got_values |= 1 << 4;
3809                                 }
3810                                 break;
3811                         }
3812                 }
3813         }
3814         mailimap_mailbox_data_status_free(data_status);
3815
3816         if (got_values != mask) {
3817                 g_warning("status: incomplete values received (%d)\n", got_values);
3818         }
3819         return MAILIMAP_NO_ERROR;
3820 }
3821
3822 static void imap_free_capabilities(IMAPSession *session)
3823 {
3824         slist_free_strings(session->capability);
3825         g_slist_free(session->capability);
3826         session->capability = NULL;
3827 }
3828
3829 /* low-level IMAP4rev1 commands */
3830
3831 static gint imap_cmd_login(IMAPSession *session,
3832                            const gchar *user, const gchar *pass,
3833                            const gchar *type)
3834 {
3835         int r;
3836         gint ok;
3837
3838         if (!strcmp(type, "LOGIN") && imap_has_capability(session, "LOGINDISABLED")) {
3839                 gint ok = MAILIMAP_ERROR_BAD_STATE;
3840                 if (imap_has_capability(session, "STARTTLS")) {
3841 #ifdef USE_GNUTLS
3842                         log_warning(LOG_PROTOCOL, _("Server requires TLS to log in.\n"));
3843                         ok = imap_cmd_starttls(session);
3844                         if (ok != MAILIMAP_NO_ERROR) {
3845                                 log_warning(LOG_PROTOCOL, _("Can't start TLS session.\n"));
3846                                 return ok;
3847                         } else {
3848                                 /* refresh capas */
3849                                 imap_free_capabilities(session);
3850                                 if ((r = imap_get_capabilities(session)) != MAILIMAP_NO_ERROR) {
3851                                         imap_handle_error(SESSION(session), NULL, r);
3852                                         log_warning(LOG_PROTOCOL, _("Can't refresh capabilities.\n"));
3853                                         return r;
3854                                 }
3855                         }
3856 #else
3857                         log_error(LOG_PROTOCOL, _("Connection to %s failed: "
3858                                         "server requires TLS, but Claws Mail "
3859                                         "has been compiled without OpenSSL "
3860                                         "support.\n"),
3861                                         SESSION(session)->server);
3862                         return MAILIMAP_ERROR_LOGIN;
3863 #endif
3864                 } else {
3865                         log_error(LOG_PROTOCOL, _("Server logins are disabled.\n"));
3866                         return MAILIMAP_ERROR_LOGIN;
3867                 }
3868         }
3869
3870         log_print(LOG_PROTOCOL, "IMAP4> Logging %s to %s using %s\n",
3871                         user,
3872                         SESSION(session)->server,
3873                         type);
3874         r = imap_threaded_login(session->folder, user, pass, type);
3875         if (r != MAILIMAP_NO_ERROR) {
3876                 imap_handle_error(SESSION(session), NULL, r);
3877                 log_print(LOG_PROTOCOL, "IMAP4< Error logging in to %s\n",
3878                                 SESSION(session)->server);
3879                 ok = r;
3880         } else {
3881                 log_print(LOG_PROTOCOL, "IMAP4< Login to %s successful\n",
3882                                 SESSION(session)->server);
3883                 ok = MAILIMAP_NO_ERROR;
3884         }
3885         return ok;
3886 }
3887
3888 static gint imap_cmd_noop(IMAPSession *session)
3889 {
3890         int r;
3891         unsigned int exists, recent, expunge, unseen, uidnext, uidval;
3892
3893         r = imap_threaded_noop(session->folder, &exists, &recent, &expunge, &unseen, &uidnext, &uidval);
3894         if (r != MAILIMAP_NO_ERROR) {
3895                 imap_handle_error(SESSION(session), NULL, r);
3896                 debug_print("noop err %d\n", r);
3897                 return r;
3898         }
3899
3900         session->folder_content_changed = FALSE;
3901
3902         if ((exists && exists != session->exists)
3903          || (recent && recent != session->recent)
3904          || (expunge && expunge != session->expunge)
3905          || (unseen && unseen != session->unseen)) {
3906                 session->folder_content_changed = TRUE;
3907         }
3908         if (uidnext != 0 && uidnext != session->uid_next) {
3909                 session->uid_next = uidnext;
3910                 session->folder_content_changed = TRUE;
3911         }
3912         if (uidval != 0 && uidval != session->uid_validity) {
3913                 session->uid_validity = uidval;
3914                 session->folder_content_changed = TRUE;
3915         }
3916
3917         session->exists = exists;
3918         session->recent = recent;
3919         session->expunge = expunge;
3920         session->unseen = unseen;
3921
3922         session_set_access_time(SESSION(session));
3923
3924         return MAILIMAP_NO_ERROR;
3925 }
3926
3927 #ifdef USE_GNUTLS
3928 static gint imap_cmd_starttls(IMAPSession *session)
3929 {
3930         int r;
3931
3932         r = imap_threaded_starttls(session->folder,
3933                 SESSION(session)->server, SESSION(session)->port);
3934         if (r != MAILIMAP_NO_ERROR) {
3935                 imap_handle_error(SESSION(session), NULL, r);
3936                 debug_print("starttls err %d\n", r);
3937                 return r;
3938         }
3939         return MAILIMAP_NO_ERROR;
3940 }
3941 #endif
3942
3943 static gint imap_cmd_select(IMAPSession *session, const gchar *folder,
3944                             gint *exists, gint *recent, gint *unseen,
3945                             guint32 *uid_validity, gint *can_create_flags,
3946                             GSList **ok_flags, gboolean block)
3947 {
3948         int r;
3949
3950         r = imap_threaded_select(session->folder, folder,
3951                                  exists, recent, unseen, uid_validity, can_create_flags, ok_flags);
3952         if (r != MAILIMAP_NO_ERROR) {
3953                 imap_handle_error(SESSION(session), NULL, r);
3954                 debug_print("select err %d\n", r);
3955                 return r;
3956         }
3957         return MAILIMAP_NO_ERROR;
3958 }
3959
3960 static gint imap_cmd_close(IMAPSession *session)
3961 {
3962         int r;
3963
3964         r = imap_threaded_close(session->folder);
3965         if (r != MAILIMAP_NO_ERROR) {
3966                 imap_handle_error(SESSION(session), NULL, r);
3967                 debug_print("close err %d\n", r);
3968                 return r;
3969         }
3970         g_free(session->mbox);
3971         session->mbox = NULL;
3972         session->exists = 0;
3973         session->recent = 0;
3974         session->expunge = 0;
3975         return MAILIMAP_NO_ERROR;
3976 }
3977
3978 static gint imap_cmd_examine(IMAPSession *session, const gchar *folder,
3979                              gint *exists, gint *recent, gint *unseen,
3980                              guint32 *uid_validity, gboolean block)
3981 {
3982         int r;
3983
3984         r = imap_threaded_examine(session->folder, folder,
3985                                   exists, recent, unseen, uid_validity);
3986         if (r != MAILIMAP_NO_ERROR) {
3987                 imap_handle_error(SESSION(session), NULL, r);
3988                 debug_print("examine err %d\n", r);
3989
3990                 return r;
3991         }
3992         return MAILIMAP_NO_ERROR;
3993 }
3994
3995 static gint imap_cmd_create(IMAPSession *session, const gchar *folder)
3996 {
3997         int r;
3998
3999         r = imap_threaded_create(session->folder, folder);
4000         if (r != MAILIMAP_NO_ERROR) {
4001                 imap_handle_error(SESSION(session), NULL, r);
4002                 return r;
4003         }
4004
4005         return MAILIMAP_NO_ERROR;
4006 }
4007
4008 static gint imap_cmd_rename(IMAPSession *session, const gchar *old_folder,
4009                             const gchar *new_folder)
4010 {
4011         int r;
4012
4013         r = imap_threaded_rename(session->folder, old_folder,
4014                                  new_folder);
4015         if (r != MAILIMAP_NO_ERROR) {
4016                 imap_handle_error(SESSION(session), NULL, r);
4017                 return r;
4018         }
4019
4020         return MAILIMAP_NO_ERROR;
4021 }
4022
4023 static gint imap_cmd_delete(IMAPSession *session, const gchar *folder)
4024 {
4025         int r;
4026
4027
4028         r = imap_threaded_delete(session->folder, folder);
4029         if (r != MAILIMAP_NO_ERROR) {
4030                 imap_handle_error(SESSION(session), NULL, r);
4031                 return r;
4032         }
4033
4034         return MAILIMAP_NO_ERROR;
4035 }
4036
4037 typedef struct _fetch_data {
4038         IMAPSession *session;
4039         guint32 uid;
4040         const gchar *filename;
4041         gboolean headers;
4042         gboolean body;
4043         gboolean done;
4044 } fetch_data;
4045
4046 static void *imap_cmd_fetch_thread(void *data)
4047 {
4048         fetch_data *stuff = (fetch_data *)data;
4049         IMAPSession *session = stuff->session;
4050         guint32 uid = stuff->uid;
4051         const gchar *filename = stuff->filename;
4052         int r;
4053
4054         if (stuff->body) {
4055                 r = imap_threaded_fetch_content(session->folder,
4056                                                uid, 1, filename);
4057         }
4058         else {
4059                 r = imap_threaded_fetch_content(session->folder,
4060                                                 uid, 0, filename);
4061         }
4062         if (r != MAILIMAP_NO_ERROR) {
4063                 imap_handle_error(SESSION(session), NULL, r);
4064                 debug_print("fetch err %d\n", r);
4065                 return GINT_TO_POINTER(r);
4066         }
4067         return GINT_TO_POINTER(MAILIMAP_NO_ERROR);
4068 }
4069
4070 static gint imap_cmd_fetch(IMAPSession *session, guint32 uid,
4071                                 const gchar *filename, gboolean headers,
4072                                 gboolean body)
4073 {
4074         fetch_data *data = g_new0(fetch_data, 1);
4075         int result = 0;
4076         data->done = FALSE;
4077         data->session = session;
4078         data->uid = uid;
4079         data->filename = filename;
4080         data->headers = headers;
4081         data->body = body;
4082
4083         if (prefs_common.work_offline &&
4084             !inc_offline_should_override(FALSE,
4085                 _("Claws Mail needs network access in order "
4086                   "to access the IMAP server."))) {
4087                 g_free(data);
4088                 return -1;
4089         }
4090         statusbar_print_all(_("Fetching message..."));
4091         result = GPOINTER_TO_INT(imap_cmd_fetch_thread(data));
4092         statusbar_pop_all();
4093         g_free(data);
4094         return result;
4095 }
4096
4097
4098 static gint imap_cmd_append(IMAPSession *session,
4099                             IMAPFolderItem *item,
4100                             const gchar *destfolder,
4101                             const gchar *file, IMAPFlags flags,
4102                             guint32 *new_uid)
4103 {
4104         struct mailimap_flag_list * flag_list;
4105         int r;
4106
4107         cm_return_val_if_fail(file != NULL, MAILIMAP_ERROR_BAD_STATE);
4108
4109         flag_list = imap_flag_to_lep(item, flags, NULL);
4110         lock_session(session);
4111         r = imap_threaded_append(session->folder, destfolder,
4112                          file, flag_list, (int *)new_uid);
4113         mailimap_flag_list_free(flag_list);
4114
4115         if (r != MAILIMAP_NO_ERROR) {
4116                 imap_handle_error(SESSION(session), NULL, r);
4117                 debug_print("append err %d\n", r);
4118                 return r;
4119         }
4120
4121         unlock_session(session);
4122
4123         return MAILIMAP_NO_ERROR;
4124 }
4125
4126 static gint imap_cmd_copy(IMAPSession *session, struct mailimap_set * set,
4127                           const gchar *destfolder,
4128                           struct mailimap_set **source, struct mailimap_set **dest)
4129 {
4130         int r;
4131
4132         g_return_val_if_fail(session != NULL, MAILIMAP_ERROR_BAD_STATE);
4133         g_return_val_if_fail(set != NULL, MAILIMAP_ERROR_BAD_STATE);
4134         g_return_val_if_fail(destfolder != NULL, MAILIMAP_ERROR_BAD_STATE);
4135
4136         r = imap_threaded_copy(session->folder, set, destfolder, source, dest);
4137         if (r != MAILIMAP_NO_ERROR) {
4138                 imap_handle_error(SESSION(session), NULL, r);
4139                 return r;
4140         }
4141
4142         return MAILIMAP_NO_ERROR;
4143 }
4144
4145 static gint imap_cmd_store(IMAPSession *session,
4146                            IMAPFolderItem *item,
4147                            struct mailimap_set * set,
4148                            IMAPFlags flags, GSList *tags, int do_add)
4149 {
4150         int r;
4151         struct mailimap_flag_list * flag_list = NULL;
4152         struct mailimap_store_att_flags * store_att_flags;
4153
4154         flag_list = imap_flag_to_lep(item, flags, tags);
4155
4156         if (do_add)
4157                 store_att_flags =
4158                         mailimap_store_att_flags_new_add_flags_silent(flag_list);
4159         else
4160                 store_att_flags =
4161                         mailimap_store_att_flags_new_remove_flags_silent(flag_list);
4162
4163         r = imap_threaded_store(session->folder, set, store_att_flags);
4164         mailimap_store_att_flags_free(store_att_flags);
4165         if (r != MAILIMAP_NO_ERROR) {
4166                 imap_handle_error(SESSION(session), NULL, r);
4167                 return r;
4168         }
4169
4170         return MAILIMAP_NO_ERROR;
4171 }
4172
4173 static gint imap_cmd_expunge(IMAPSession *session, gboolean do_expunge)
4174 {
4175         int r;
4176
4177         if (!do_expunge)
4178                 return MAILIMAP_NO_ERROR;
4179
4180         if (prefs_common.work_offline &&
4181             !inc_offline_should_override(FALSE,
4182                 _("Claws Mail needs network access in order "
4183                   "to access the IMAP server."))) {
4184                 return -1;
4185         }
4186
4187         r = imap_threaded_expunge(session->folder);
4188         if (r != MAILIMAP_NO_ERROR) {
4189                 imap_handle_error(SESSION(session), NULL, r);
4190                 return r;
4191         }
4192
4193         return MAILIMAP_NO_ERROR;
4194 }
4195
4196 gint imap_expunge(Folder *folder, FolderItem *item)
4197 {
4198         IMAPSession *session = imap_session_get(folder);
4199         if (session == NULL)
4200                 return -1;
4201
4202         return imap_cmd_expunge(session, TRUE);
4203 }
4204
4205 static void imap_path_separator_subst(gchar *str, gchar separator)
4206 {
4207         gchar *p;
4208         gboolean in_escape = FALSE;
4209
4210         if (!separator || separator == '/') return;
4211
4212         for (p = str; *p != '\0'; p++) {
4213                 if (*p == '/' && !in_escape)
4214                         *p = separator;
4215                 else if (*p == '&' && *(p + 1) != '-' && !in_escape)
4216                         in_escape = TRUE;
4217                 else if (*p == '-' && in_escape)
4218                         in_escape = FALSE;
4219         }
4220 }
4221
4222 static gboolean imap_rename_folder_func(GNode *node, gpointer data)
4223 {
4224         FolderItem *item = node->data;
4225         gchar **paths = data;
4226         const gchar *oldpath = paths[0];
4227         const gchar *newpath = paths[1];
4228         gchar *real_oldpath, *real_newpath;
4229         gchar *base;
4230         gchar *new_itempath;
4231         gint oldpathlen;
4232         IMAPSession *session = imap_session_get(item->folder);
4233         gint ok = MAILIMAP_NO_ERROR;
4234         oldpathlen = strlen(oldpath);
4235         if (strncmp(oldpath, item->path, oldpathlen) != 0) {
4236                 g_warning("path doesn't match: %s, %s\n", oldpath, item->path);
4237                 return TRUE;
4238         }
4239
4240         base = item->path + oldpathlen;
4241         while (*base == G_DIR_SEPARATOR) base++;
4242         if (*base == '\0')
4243                 new_itempath = g_strdup(newpath);
4244         else
4245                 new_itempath = g_strconcat(newpath, G_DIR_SEPARATOR_S, base,
4246                                            NULL);
4247
4248         real_oldpath = imap_get_real_path(session, IMAP_FOLDER(item->folder), item->path, &ok);
4249         g_free(item->path);
4250         item->path = new_itempath;
4251
4252         real_newpath = imap_get_real_path(session, IMAP_FOLDER(item->folder), item->path, &ok);
4253
4254         imap_threaded_subscribe(item->folder, real_oldpath, FALSE);
4255         imap_threaded_subscribe(item->folder, real_newpath, TRUE);
4256
4257         g_free(real_oldpath);
4258         g_free(real_newpath);
4259         return FALSE;
4260 }
4261
4262 static gint get_list_of_uids(IMAPSession *session, Folder *folder, IMAPFolderItem *item, GSList **msgnum_list)
4263 {
4264         GSList *uidlist, *elem;
4265         int r = -1;
4266         clist * lep_uidlist;
4267         gint ok, nummsgs = 0;
4268
4269         if (session == NULL) {
4270                 return -1;
4271         }
4272
4273         ok = imap_select(session, IMAP_FOLDER(folder), FOLDER_ITEM(item),
4274                          NULL, NULL, NULL, NULL, NULL, TRUE);
4275         if (ok != MAILIMAP_NO_ERROR) {
4276                 return -1;
4277         }
4278
4279         g_slist_free(item->uid_list);
4280         item->uid_list = NULL;
4281
4282         uidlist = NULL;
4283
4284         if (folder->account && folder->account->low_bandwidth) {
4285                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SIMPLE,
4286                                 NULL, NULL, &lep_uidlist);
4287         }
4288
4289         if (r == MAILIMAP_NO_ERROR) {
4290                 GSList * fetchuid_list =
4291                         imap_uid_list_from_lep(lep_uidlist, NULL);
4292                 mailimap_search_result_free(lep_uidlist);
4293
4294                 uidlist = g_slist_concat(fetchuid_list, uidlist);
4295         } else {
4296                 carray * lep_uidtab;
4297                 if (r != -1) { /* inited */
4298                         imap_handle_error(SESSION(session), NULL, r);
4299                         if (is_fatal(r))
4300                                 return -1;
4301                 }
4302                 r = imap_threaded_fetch_uid(folder, 1,
4303                                     &lep_uidtab);
4304                 if (r == MAILIMAP_NO_ERROR) {
4305                         GSList * fetchuid_list =
4306                                 imap_uid_list_from_lep_tab(lep_uidtab);
4307                         imap_fetch_uid_list_free(lep_uidtab);
4308                         uidlist = g_slist_concat(fetchuid_list, uidlist);
4309                 }
4310         }
4311
4312         if (r != MAILIMAP_NO_ERROR) {
4313                 imap_handle_error(SESSION(session), NULL, r);
4314                 return -1;
4315         }
4316
4317         for (elem = uidlist; elem != NULL; elem = g_slist_next(elem)) {
4318                 guint msgnum;
4319
4320                 msgnum = GPOINTER_TO_INT(elem->data);
4321
4322                 *msgnum_list = g_slist_prepend(*msgnum_list, GINT_TO_POINTER(msgnum));
4323                 item->uid_list = g_slist_prepend(item->uid_list, GINT_TO_POINTER(msgnum));
4324                 nummsgs++;
4325         }
4326         g_slist_free(uidlist);
4327
4328         unlock_session(session); /* locked from imap_get_num_list */
4329
4330         return nummsgs;
4331
4332 }
4333
4334 gint imap_get_num_list(Folder *folder, FolderItem *_item, GSList **msgnum_list, gboolean *old_uids_valid)
4335 {
4336         IMAPFolderItem *item = (IMAPFolderItem *)_item;
4337         IMAPSession *session;
4338         gint nummsgs;
4339         GSList *uidlist = NULL;
4340         gchar *dir;
4341         gint known_list_len = 0;
4342         debug_print("get_num_list\n");
4343
4344         g_return_val_if_fail(folder != NULL, -1);
4345         g_return_val_if_fail(item != NULL, -1);
4346         g_return_val_if_fail(item->item.path != NULL, -1);
4347         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
4348         g_return_val_if_fail(folder->account != NULL, -1);
4349
4350         known_list_len = g_slist_length(item->uid_list);
4351         if (!item->should_update) {
4352                 debug_print("get_num_list: nothing to update\n");
4353                 *old_uids_valid = TRUE;
4354                 if (known_list_len == item->item.total_msgs
4355                  && known_list_len > 0) {
4356                         *msgnum_list = g_slist_copy(item->uid_list);
4357                         return known_list_len;
4358                 } else {
4359                         debug_print("don't know the list length...\n");
4360                 }
4361         }
4362
4363         if (prefs_common.work_offline &&
4364             !inc_offline_should_override(FALSE,
4365                 _("Claws Mail needs network access in order "
4366                   "to access the IMAP server."))) {
4367                 return -1;
4368         }
4369
4370         debug_print("getting session...\n");
4371         session = imap_session_get(folder);
4372         g_return_val_if_fail(session != NULL, -1);
4373
4374         lock_session(session); /* unlocked by get_list_of_uids */
4375         if (FOLDER_ITEM(item)->path)
4376                 statusbar_print_all(_("Scanning folder %s%c%s ..."),
4377                                       FOLDER_ITEM(item)->folder->name,
4378                                       G_DIR_SEPARATOR,
4379                                       FOLDER_ITEM(item)->path);
4380         else
4381                 statusbar_print_all(_("Scanning folder %s ..."),
4382                                       FOLDER_ITEM(item)->folder->name);
4383
4384         if (item->should_trash_cache) {
4385                 *old_uids_valid = FALSE;
4386                 debug_print("get_num_list: trashing num list\n");
4387                 debug_print("Freeing imap uid cache\n");
4388                 item->lastuid = 0;
4389                 g_slist_free(item->uid_list);
4390                 item->uid_list = NULL;
4391
4392                 imap_delete_all_cached_messages((FolderItem *)item);
4393         } else {
4394                 debug_print("get_num_list: updating num list\n");
4395                 *old_uids_valid = TRUE;
4396         }
4397
4398         nummsgs = get_list_of_uids(session, folder, item, &uidlist);
4399         /* session could be broken now, in case of fatal error */
4400
4401         debug_print("get_num_list: got %d msgs\n", nummsgs);
4402
4403         if (nummsgs < 0) {
4404                 statusbar_pop_all();
4405                 return -1;
4406         }
4407
4408         *msgnum_list = uidlist;
4409
4410         dir = folder_item_get_path((FolderItem *)item);
4411         debug_print("removing old messages from %s\n", dir);
4412         remove_numbered_files_not_in_list(dir, *msgnum_list);
4413         g_free(dir);
4414
4415         debug_print("get_num_list - ok - %i\n", nummsgs);
4416         statusbar_pop_all();
4417         item->should_trash_cache = FALSE;
4418         item->should_update = FALSE;
4419         return nummsgs;
4420 }
4421
4422 static MsgInfo *imap_parse_msg(const gchar *file, FolderItem *item)
4423 {
4424         MsgInfo *msginfo;
4425         MsgFlags flags;
4426
4427         flags.perm_flags = MSG_NEW|MSG_UNREAD;
4428         flags.tmp_flags = 0;
4429
4430         g_return_val_if_fail(item != NULL, NULL);
4431         g_return_val_if_fail(file != NULL, NULL);
4432
4433         if (folder_has_parent_of_type(item, F_QUEUE)) {
4434                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
4435         } else if (folder_has_parent_of_type(item, F_DRAFT)) {
4436                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
4437         }
4438
4439         msginfo = procheader_parse_file(file, flags, FALSE, FALSE);
4440         if (!msginfo) return NULL;
4441
4442         msginfo->plaintext_file = g_strdup(file);
4443         msginfo->folder = item;
4444
4445         return msginfo;
4446 }
4447
4448 GSList *imap_get_msginfos(Folder *folder, FolderItem *item,
4449                           GSList *msgnum_list)
4450 {
4451         IMAPSession *session;
4452         MsgInfoList *ret = NULL;
4453         gint ok;
4454
4455         debug_print("get_msginfos\n");
4456
4457         g_return_val_if_fail(folder != NULL, NULL);
4458         g_return_val_if_fail(item != NULL, NULL);
4459         g_return_val_if_fail(msgnum_list != NULL, NULL);
4460
4461         debug_print("getting session...\n");
4462         session = imap_session_get(folder);
4463         g_return_val_if_fail(session != NULL, NULL);
4464
4465         lock_session(session); /* unlocked later in the function */
4466
4467         debug_print("IMAP getting msginfos\n");
4468         ok = imap_select(session, IMAP_FOLDER(folder), item,
4469                          NULL, NULL, NULL, NULL, NULL, FALSE);
4470         if (ok != MAILIMAP_NO_ERROR) {
4471                 return NULL;
4472         }
4473         if (!(folder_has_parent_of_type(item, F_DRAFT) ||
4474               folder_has_parent_of_type(item, F_QUEUE))) {
4475                 ret = g_slist_concat(ret,
4476                         imap_get_uncached_messages(session, item,
4477                                                    msgnum_list, &ok));
4478                 if (ok != MAILIMAP_NO_ERROR)
4479                         return NULL;
4480                 unlock_session(session);
4481         } else {
4482                 MsgNumberList *sorted_list, *elem, *llast = NULL;
4483                 gint startnum, lastnum;
4484
4485                 unlock_session(session);
4486
4487                 sorted_list = g_slist_sort(g_slist_copy(msgnum_list), g_int_compare);
4488
4489                 startnum = lastnum = GPOINTER_TO_INT(sorted_list->data);
4490
4491                 llast = g_slist_last(ret);
4492                 for (elem = sorted_list;; elem = g_slist_next(elem)) {
4493                         guint num = 0;
4494
4495                         if (elem)
4496                                 num = GPOINTER_TO_INT(elem->data);
4497
4498                         if (num > lastnum + 1 || elem == NULL) {
4499                                 int i;
4500                                 for (i = startnum; i <= lastnum; ++i) {
4501                                         gchar *file;
4502                                         file = imap_fetch_msg(folder, item, i);
4503                                         if (file != NULL) {
4504                                                 MsgInfo *msginfo = imap_parse_msg(file, item);
4505                                                 if (msginfo != NULL) {
4506                                                         msginfo->msgnum = i;
4507                                                         if (llast == NULL)
4508                                                                 llast = ret = g_slist_append(ret, msginfo);
4509                                                         else {
4510                                                                 llast = g_slist_append(llast, msginfo);
4511                                                                 llast = llast->next;
4512                                                         }
4513                                                 }
4514                                                 g_free(file);
4515                                         }
4516                                 }
4517
4518                                 if (elem == NULL)
4519                                         break;
4520
4521                                 startnum = num;
4522                         }
4523                         lastnum = num;
4524                 }
4525
4526                 g_slist_free(sorted_list);
4527         }
4528         return ret;
4529 }
4530
4531 MsgInfo *imap_get_msginfo(Folder *folder, FolderItem *item, gint uid)
4532 {
4533         MsgInfo *msginfo = NULL;
4534         MsgInfoList *msginfolist;
4535         MsgNumberList numlist;
4536
4537         numlist.next = NULL;
4538         numlist.data = GINT_TO_POINTER(uid);
4539
4540         msginfolist = imap_get_msginfos(folder, item, &numlist);
4541         if (msginfolist != NULL) {
4542                 msginfo = msginfolist->data;
4543                 g_slist_free(msginfolist);
4544         }
4545
4546         return msginfo;
4547 }
4548
4549 gboolean imap_scan_required(Folder *folder, FolderItem *_item)
4550 {
4551         IMAPSession *session;
4552         IMAPFolderItem *item = (IMAPFolderItem *)_item;
4553         gint ok, exists = 0, unseen = 0;
4554         guint32 uid_next = 0, uid_val = 0;
4555         gboolean selected_folder;
4556
4557         g_return_val_if_fail(folder != NULL, FALSE);
4558         g_return_val_if_fail(item != NULL, FALSE);
4559         g_return_val_if_fail(item->item.folder != NULL, FALSE);
4560         g_return_val_if_fail(FOLDER_CLASS(item->item.folder) == &imap_class, FALSE);
4561
4562         if (item->item.path == NULL)
4563                 return FALSE;
4564
4565         if (item->should_update) {
4566                 debug_print("scan already required\n");
4567                 return TRUE;
4568         }
4569         debug_print("getting session...\n");
4570         session = imap_session_get(folder);
4571
4572         g_return_val_if_fail(session != NULL, FALSE);
4573         lock_session(session); /* unlocked later in the function */
4574
4575         selected_folder = (session->mbox != NULL) &&
4576                           (!strcmp(session->mbox, item->item.path));
4577         if (selected_folder) {
4578                 if (!session->folder_content_changed) {
4579                         ok = imap_cmd_noop(session);
4580                         if (ok != MAILIMAP_NO_ERROR) {
4581                                 debug_print("disconnected!\n");
4582                                 if (!is_fatal(ok))
4583                                         session = imap_reconnect_if_possible(folder, session);
4584                                 else
4585                                         session = imap_session_get(folder);
4586                                 if (session == NULL)
4587                                         return FALSE;
4588                         }
4589
4590                         if (session->folder_content_changed) {
4591                                 debug_print("CHANGED (self-noop)! scan_required\n");
4592                                 item->should_update = TRUE;
4593                                 if (session->uid_validity && session->uid_validity != item->item.mtime) {
4594                                         item->item.mtime = session->uid_validity;
4595                                         item->should_trash_cache = TRUE;
4596                                 }
4597                                 unlock_session(session);
4598                                 return TRUE;
4599                         }
4600                 } else {
4601                         debug_print("CHANGED (previous noop)! scan_required\n");
4602                         item->should_update = TRUE;
4603                         if (session->uid_validity && session->uid_validity != item->item.mtime) {
4604                                 item->item.mtime = session->uid_validity;
4605                                 item->should_trash_cache = TRUE;
4606                         }
4607                         unlock_session(session);
4608                         return TRUE;
4609                 }
4610         } else {
4611                 ok = imap_status(session, IMAP_FOLDER(folder), item->item.path, IMAP_FOLDER_ITEM(item),
4612                                  &exists, &uid_next, &uid_val, &unseen, FALSE);
4613                 if (ok != MAILIMAP_NO_ERROR) {
4614                         return FALSE;
4615                 }
4616
4617                 debug_print("exists %d, item->item.total_msgs %d\n",
4618                         exists, item->item.total_msgs);
4619                 if (exists != item->item.total_msgs
4620                     || unseen != item->item.unread_msgs
4621                     || uid_next != item->uid_next
4622                     || uid_val != item->item.mtime) {
4623                         debug_print("CHANGED (status)! scan_required\n");
4624                         item->last_change = time(NULL);
4625                         item->should_update = TRUE;
4626                         item->uid_next = uid_next;
4627                         if (uid_val != item->item.mtime) {
4628                                 item->item.mtime = uid_val;
4629                                 item->should_trash_cache = TRUE;
4630                         }
4631                         unlock_session(session);
4632                         return TRUE;
4633                 }
4634         }
4635         unlock_session(session);
4636
4637         item->should_update = FALSE;
4638         return FALSE;
4639 }
4640
4641 void imap_change_flags(Folder *folder, FolderItem *item, MsgInfo *msginfo, MsgPermFlags newflags)
4642 {
4643         IMAPSession *session;
4644         IMAPFlags flags_set = 0, flags_unset = 0;
4645         gint ok = MAILIMAP_NO_ERROR;
4646         MsgNumberList numlist;
4647         hashtable_data *ht_data = NULL;
4648
4649         g_return_if_fail(folder != NULL);
4650         g_return_if_fail(folder->klass == &imap_class);
4651         g_return_if_fail(item != NULL);
4652         g_return_if_fail(item->folder == folder);
4653         g_return_if_fail(msginfo != NULL);
4654         g_return_if_fail(msginfo->folder == item);
4655
4656         if (!MSG_IS_MARKED(msginfo->flags) &&  (newflags & MSG_MARKED))
4657                 flags_set |= IMAP_FLAG_FLAGGED;
4658         if ( MSG_IS_MARKED(msginfo->flags) && !(newflags & MSG_MARKED))
4659                 flags_unset |= IMAP_FLAG_FLAGGED;
4660
4661         if (!MSG_IS_UNREAD(msginfo->flags) &&  (newflags & MSG_UNREAD))
4662                 flags_unset |= IMAP_FLAG_SEEN;
4663         if ( MSG_IS_UNREAD(msginfo->flags) && !(newflags & MSG_UNREAD))
4664                 flags_set |= IMAP_FLAG_SEEN;
4665
4666         if (!MSG_IS_REPLIED(msginfo->flags) &&  (newflags & MSG_REPLIED))
4667                 flags_set |= IMAP_FLAG_ANSWERED;
4668         if ( MSG_IS_REPLIED(msginfo->flags) && !(newflags & MSG_REPLIED))
4669                 flags_unset |= IMAP_FLAG_ANSWERED;
4670
4671         if (!MSG_IS_FORWARDED(msginfo->flags) &&  (newflags & MSG_FORWARDED))
4672                 flags_set |= IMAP_FLAG_FORWARDED;
4673         if ( MSG_IS_FORWARDED(msginfo->flags) && !(newflags & MSG_FORWARDED))
4674                 flags_unset |= IMAP_FLAG_FORWARDED;
4675
4676         if (!MSG_IS_SPAM(msginfo->flags) &&  (newflags & MSG_SPAM)) {
4677                 flags_set |= IMAP_FLAG_SPAM;
4678                 flags_unset |= IMAP_FLAG_HAM;
4679         }
4680         if ( MSG_IS_SPAM(msginfo->flags) && !(newflags & MSG_SPAM)) {
4681                 flags_set |= IMAP_FLAG_HAM;
4682                 flags_unset |= IMAP_FLAG_SPAM;
4683         }
4684         if (!MSG_IS_DELETED(msginfo->flags) &&  (newflags & MSG_DELETED))
4685                 flags_set |= IMAP_FLAG_DELETED;
4686         if ( MSG_IS_DELETED(msginfo->flags) && !(newflags & MSG_DELETED))
4687                 flags_unset |= IMAP_FLAG_DELETED;
4688
4689         if (!flags_set && !flags_unset) {
4690                 /* the changed flags were not translatable to IMAP-speak.
4691                  * like MSG_POSTFILTERED, so just apply. */
4692                 msginfo->flags.perm_flags = newflags;
4693                 return;
4694         }
4695
4696         debug_print("getting session...\n");
4697         session = imap_session_get(folder);
4698         if (!session) {
4699                 return;
4700         }
4701
4702         if ((ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
4703             NULL, NULL, NULL, NULL, NULL, FALSE)) != MAILIMAP_NO_ERROR) {
4704                 return;
4705         }
4706         numlist.next = NULL;
4707         numlist.data = GINT_TO_POINTER(msginfo->msgnum);
4708
4709         if (IMAP_FOLDER_ITEM(item)->batching) {
4710                 /* instead of performing an UID STORE command for each message change,
4711                  * as a lot of them can change "together", we just fill in hashtables
4712                  * and defer the treatment so that we're able to send only one
4713                  * command.
4714                  */
4715                 debug_print("IMAP batch mode on, deferring flags change\n");
4716                 if (flags_set) {
4717                         ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->flags_set_table,
4718                                 GINT_TO_POINTER(flags_set));
4719                         if (ht_data == NULL) {
4720                                 ht_data = g_new0(hashtable_data, 1);
4721                                 ht_data->item = IMAP_FOLDER_ITEM(item);
4722                                 g_hash_table_insert(IMAP_FOLDER_ITEM(item)->flags_set_table,
4723                                         GINT_TO_POINTER(flags_set), ht_data);
4724                         }
4725                         ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
4726                 }
4727                 if (flags_unset) {
4728                         ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->flags_unset_table,
4729                                 GINT_TO_POINTER(flags_unset));
4730                         if (ht_data == NULL) {
4731                                 ht_data = g_new0(hashtable_data, 1);
4732                                 ht_data->item = IMAP_FOLDER_ITEM(item);
4733                                 g_hash_table_insert(IMAP_FOLDER_ITEM(item)->flags_unset_table,
4734                                         GINT_TO_POINTER(flags_unset), ht_data);
4735                         }
4736                         ht_data->msglist = g_slist_prepend(ht_data->msglist,
4737                                         GINT_TO_POINTER(msginfo->msgnum));
4738                 }
4739         } else {
4740                 debug_print("IMAP changing flags\n");
4741                 if (flags_set) {
4742                         ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item), &numlist, flags_set, NULL, TRUE);
4743                         if (ok != MAILIMAP_NO_ERROR) {
4744                                 return;
4745                         }
4746                 }
4747
4748                 if (flags_unset) {
4749                         ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item), &numlist, flags_unset, NULL, FALSE);
4750                         if (ok != MAILIMAP_NO_ERROR) {
4751                                 return;
4752                         }
4753                 }
4754         }
4755         msginfo->flags.perm_flags = newflags;
4756         return;
4757 }
4758
4759 static gint imap_remove_msg(Folder *folder, FolderItem *item, gint uid)
4760 {
4761         gint ok;
4762         IMAPSession *session;
4763         gchar *dir;
4764         MsgNumberList numlist;
4765
4766         g_return_val_if_fail(folder != NULL, -1);
4767         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
4768         g_return_val_if_fail(item != NULL, -1);
4769
4770         debug_print("getting session...\n");
4771         session = imap_session_get(folder);
4772         if (!session) return -1;
4773
4774         ok = imap_select(session, IMAP_FOLDER(folder), item,
4775                          NULL, NULL, NULL, NULL, NULL, FALSE);
4776         if (ok != MAILIMAP_NO_ERROR) {
4777                 return ok;
4778         }
4779         numlist.next = NULL;
4780         numlist.data = GINT_TO_POINTER(uid);
4781
4782         ok = imap_set_message_flags
4783                 (session, IMAP_FOLDER_ITEM(item), &numlist, IMAP_FLAG_DELETED, NULL, TRUE);
4784         if (ok != MAILIMAP_NO_ERROR) {
4785                 log_warning(LOG_PROTOCOL, _("can't set deleted flags: %d\n"), uid);
4786                 return ok;
4787         }
4788
4789         ok = imap_cmd_expunge(session, folder->account->imap_use_trash);
4790
4791         if (ok != MAILIMAP_NO_ERROR) {
4792                 log_warning(LOG_PROTOCOL, _("can't expunge\n"));
4793                 return ok;
4794         }
4795
4796         IMAP_FOLDER_ITEM(item)->uid_list = g_slist_remove(
4797             IMAP_FOLDER_ITEM(item)->uid_list, numlist.data);
4798         dir = folder_item_get_path(item);
4799         if (is_dir_exist(dir))
4800                 remove_numbered_files(dir, uid, uid);
4801         g_free(dir);
4802         return MAILIMAP_NO_ERROR;
4803 }
4804
4805 static gint compare_msginfo(gconstpointer a, gconstpointer b)
4806 {
4807         return ((MsgInfo *)a)->msgnum - ((MsgInfo *)b)->msgnum;
4808 }
4809
4810 static guint gslist_find_next_num(MsgNumberList **list, guint num)
4811 {
4812         GSList *elem;
4813
4814         g_return_val_if_fail(list != NULL, -1);
4815
4816         for (elem = *list; elem != NULL; elem = g_slist_next(elem))
4817                 if (GPOINTER_TO_INT(elem->data) >= num)
4818                         break;
4819         *list = elem;
4820         return elem != NULL ? GPOINTER_TO_INT(elem->data) : (gint)-1;
4821 }
4822
4823 static gboolean flag_ok(IMAPFolderItem *item, guint flag)
4824 {
4825         if (item->ok_flags && g_slist_find(item->ok_flags, GUINT_TO_POINTER(flag))) {
4826                 debug_print("flag %d is OK\n", flag);
4827                 return TRUE;
4828         }
4829         if (item->can_create_flags == ITEM_CAN_CREATE_FLAGS) {
4830                 debug_print("creating flags is OK\n");
4831                 return TRUE;
4832         }
4833         return FALSE;
4834 }
4835
4836 /*
4837  * NEW and DELETED flags are not syncronized
4838  * - The NEW/RECENT flags in IMAP folders can not really be directly
4839  *   modified by Sylpheed
4840  * - The DELETE/DELETED flag in IMAP and Sylpheed don't have the same
4841  *   meaning, in IMAP it always removes the messages from the FolderItem
4842  *   in Sylpheed it can mean to move the message to trash
4843  */
4844
4845 typedef struct _get_flags_data {
4846         Folder *folder;
4847         FolderItem *item;
4848         MsgInfoList *msginfo_list;
4849         GHashTable *msgflags;
4850         gboolean full_search;
4851         gboolean done;
4852 } get_flags_data;
4853
4854 static /*gint*/ void *imap_get_flags_thread(void *data)
4855 {
4856         get_flags_data *stuff = (get_flags_data *)data;
4857         Folder *folder = stuff->folder;
4858         FolderItem *fitem = (FolderItem *) stuff->item;
4859         MsgInfoList *msginfo_list = stuff->msginfo_list;
4860         GHashTable *msgflags = stuff->msgflags;
4861         GSList *elem;
4862         carray * lep_uidtab;
4863         IMAPSession *session;
4864         gint ok;
4865         int r = MAILIMAP_NO_ERROR;
4866         GHashTable *flags_hash = NULL;
4867         GHashTable *tags_hash = NULL;
4868         gboolean full_search = stuff->full_search;
4869         GSList *sorted_list = NULL;
4870         GSList *unseen = NULL, *answered = NULL, *flagged = NULL, *deleted = NULL, *forwarded = NULL, *spam = NULL;
4871         GSList *seq_list, *cur;
4872         gboolean reverse_seen = FALSE;
4873         gboolean selected_folder;
4874         gint exists_cnt, unseen_cnt;
4875         gboolean got_alien_tags = FALSE;
4876
4877         session = imap_session_get(folder);
4878
4879         if (session == NULL) {
4880                 stuff->done = TRUE;
4881                 return GINT_TO_POINTER(-1);
4882         }
4883         selected_folder = (session->mbox != NULL) &&
4884                           (!strcmp(session->mbox, fitem->path));
4885
4886         lock_session(session);
4887         if (!selected_folder) {
4888                 ok = imap_select(session, IMAP_FOLDER(folder), fitem,
4889                         &exists_cnt, NULL, &unseen_cnt, NULL, NULL, TRUE);
4890                 if (ok != MAILIMAP_NO_ERROR) {
4891                         stuff->done = TRUE;
4892                         return GINT_TO_POINTER(-1);
4893                 }
4894
4895                 if (unseen_cnt > exists_cnt / 2)
4896                         reverse_seen = TRUE;
4897         }
4898         else {
4899                 if (fitem->unread_msgs > fitem->total_msgs / 2)
4900                         reverse_seen = TRUE;
4901         }
4902
4903         sorted_list = g_slist_sort(g_slist_copy(msginfo_list), compare_msginfo);
4904         if (!full_search) {
4905                 seq_list = imap_get_lep_set_from_msglist(IMAP_FOLDER(folder), msginfo_list);
4906         } else {
4907                 struct mailimap_set * set;
4908                 set = mailimap_set_new_interval(1, 0);
4909                 seq_list = g_slist_append(NULL, set);
4910         }
4911
4912         if (folder->account && folder->account->low_bandwidth) {
4913                 for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
4914                         struct mailimap_set * imapset;
4915                         clist * lep_uidlist;
4916                         int r;
4917
4918                         imapset = cur->data;
4919                         if (reverse_seen) {
4920                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SEEN, NULL,
4921                                                          full_search ? NULL:imapset, &lep_uidlist);
4922                         }
4923                         else {
4924                                 r = imap_threaded_search(folder,
4925                                                          IMAP_SEARCH_TYPE_UNSEEN, NULL,
4926                                                          full_search ? NULL:imapset, &lep_uidlist);
4927                         }
4928                         if (r == MAILIMAP_NO_ERROR) {
4929                                 GSList * uidlist;
4930
4931                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
4932                                 mailimap_search_result_free(lep_uidlist);
4933
4934                                 unseen = g_slist_concat(unseen, uidlist);
4935                         } else {
4936                                 imap_handle_error(SESSION(session), NULL, r);
4937                                 goto bail;
4938                         }
4939
4940                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_FLAGGED, NULL,
4941                                                  full_search ? NULL:imapset, &lep_uidlist);
4942                         if (r == MAILIMAP_NO_ERROR) {
4943                                 GSList * uidlist;
4944
4945                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
4946                                 mailimap_search_result_free(lep_uidlist);
4947
4948                                 flagged = g_slist_concat(flagged, uidlist);
4949                         } else {
4950                                 imap_handle_error(SESSION(session), NULL, r);
4951                                 goto bail;
4952                         }
4953
4954                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
4955                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_ANSWERED, NULL,
4956                                                          full_search ? NULL:imapset, &lep_uidlist);
4957                                 if (r == MAILIMAP_NO_ERROR) {
4958                                         GSList * uidlist;
4959
4960                                         uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
4961                                         mailimap_search_result_free(lep_uidlist);
4962
4963                                         answered = g_slist_concat(answered, uidlist);
4964                                 } else {
4965                                         imap_handle_error(SESSION(session), NULL, r);
4966                                         goto bail;
4967                                 }
4968
4969                                 if (flag_ok(IMAP_FOLDER_ITEM(fitem), IMAP_FLAG_FORWARDED)) {
4970                                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_FORWARDED, NULL,
4971                                                                  full_search ? NULL:imapset, &lep_uidlist);
4972                                         if (r == MAILIMAP_NO_ERROR) {
4973                                                 GSList * uidlist;
4974
4975                                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
4976                                                 mailimap_search_result_free(lep_uidlist);
4977
4978                                                 forwarded = g_slist_concat(forwarded, uidlist);
4979                                         } else {
4980                                                 imap_handle_error(SESSION(session), NULL, r);
4981                                                 goto bail;
4982                                         }
4983                                 }
4984
4985                                 if (flag_ok(IMAP_FOLDER_ITEM(fitem), IMAP_FLAG_SPAM)) {
4986                                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SPAM, NULL,
4987                                                                  full_search ? NULL:imapset, &lep_uidlist);
4988                                         if (r == MAILIMAP_NO_ERROR) {
4989                                                 GSList * uidlist;
4990
4991                                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
4992                                                 mailimap_search_result_free(lep_uidlist);
4993
4994                                                 spam = g_slist_concat(spam, uidlist);
4995                                         } else {
4996                                                 imap_handle_error(SESSION(session), NULL, r);
4997                                                 goto bail;
4998                                         }
4999                                 }
5000
5001                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_DELETED, NULL,
5002                                                          full_search ? NULL:imapset, &lep_uidlist);
5003                                 if (r == MAILIMAP_NO_ERROR) {
5004                                         GSList * uidlist;
5005
5006                                         uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5007                                         mailimap_search_result_free(lep_uidlist);
5008
5009                                         deleted = g_slist_concat(deleted, uidlist);
5010                                 } else {
5011                                         imap_handle_error(SESSION(session), NULL, r);
5012                                         goto bail;
5013                                 }
5014                         }
5015                 }
5016
5017         } else {
5018                 r = imap_threaded_fetch_uid_flags(folder, 1, &lep_uidtab);
5019                 if (r == MAILIMAP_NO_ERROR) {
5020                         flags_hash = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, NULL);
5021                         tags_hash = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, NULL);
5022                         imap_flags_hash_from_lep_uid_flags_tab(lep_uidtab, flags_hash, tags_hash);
5023                         imap_fetch_uid_flags_list_free(lep_uidtab);
5024                 } else {
5025                         imap_handle_error(SESSION(session), NULL, r);
5026                         goto bail;
5027                 }
5028         }
5029
5030 bail:
5031         if (r == MAILIMAP_NO_ERROR)
5032                 unlock_session(session);
5033
5034         for (elem = sorted_list; elem != NULL; elem = g_slist_next(elem)) {
5035                 MsgInfo *msginfo;
5036                 MsgPermFlags flags, oldflags;
5037                 gboolean wasnew;
5038
5039                 msginfo = (MsgInfo *) elem->data;
5040                 flags = msginfo->flags.perm_flags;
5041                 wasnew = (flags & MSG_NEW);
5042                 oldflags = flags & ~(MSG_NEW|MSG_UNREAD|MSG_REPLIED|MSG_FORWARDED|MSG_MARKED|MSG_DELETED|MSG_SPAM);
5043
5044                 if (folder->account && folder->account->low_bandwidth) {
5045                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
5046                                 flags &= ~((reverse_seen ? 0 : MSG_UNREAD | MSG_NEW) | MSG_REPLIED | MSG_FORWARDED | MSG_MARKED | MSG_SPAM);
5047                         } else {
5048                                 flags &= ~((reverse_seen ? 0 : MSG_UNREAD | MSG_NEW | MSG_MARKED));
5049                         }
5050                         if (reverse_seen)
5051                                 flags |= MSG_UNREAD | (wasnew ? MSG_NEW : 0);
5052                         if (gslist_find_next_num(&unseen, msginfo->msgnum) == msginfo->msgnum) {
5053                                 if (!reverse_seen) {
5054                                         flags |= MSG_UNREAD | (wasnew ? MSG_NEW : 0);
5055                                 } else {
5056                                         flags &= ~(MSG_UNREAD | MSG_NEW);
5057                                 }
5058                         }
5059
5060                         if (gslist_find_next_num(&flagged, msginfo->msgnum) == msginfo->msgnum)
5061                                 flags |= MSG_MARKED;
5062                         else
5063                                 flags &= ~MSG_MARKED;
5064
5065                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
5066                                 if (gslist_find_next_num(&answered, msginfo->msgnum) == msginfo->msgnum)
5067                                         flags |= MSG_REPLIED;
5068                                 else
5069                                         flags &= ~MSG_REPLIED;
5070                                 if (gslist_find_next_num(&forwarded, msginfo->msgnum) == msginfo->msgnum)
5071                                         flags |= MSG_FORWARDED;
5072                                 else
5073                                         flags &= ~MSG_FORWARDED;
5074                                 if (gslist_find_next_num(&spam, msginfo->msgnum) == msginfo->msgnum)
5075                                         flags |= MSG_SPAM;
5076                                 else
5077                                         flags &= ~MSG_SPAM;
5078                                 if (gslist_find_next_num(&deleted, msginfo->msgnum) == msginfo->msgnum)
5079                                         flags |= MSG_DELETED;
5080                                 else
5081                                         flags &= ~MSG_DELETED;
5082                         }
5083                 } else {
5084                         if (flags_hash != NULL) {
5085
5086                                 flags = GPOINTER_TO_INT(g_hash_table_lookup(flags_hash,
5087                                                 GINT_TO_POINTER(msginfo->msgnum)));
5088                         }
5089
5090                         if ((flags & MSG_UNREAD) == 0)
5091                                 flags &= ~MSG_NEW;
5092                         else if (wasnew)
5093                                 flags |= MSG_NEW;
5094                         flags |= oldflags;
5095
5096                         if (tags_hash != NULL) {
5097                                 GSList *tags = g_hash_table_lookup(tags_hash, GINT_TO_POINTER(msginfo->msgnum));
5098                                 GSList *cur;
5099
5100                                 g_slist_free(msginfo->tags);
5101                                 msginfo->tags = NULL;
5102
5103                                 for (cur = tags; cur; cur = cur->next) {
5104                                         gchar *real_tag = imap_modified_utf7_to_utf8(cur->data, TRUE);
5105                                         gint id = 0;
5106                                         id = tags_get_id_for_str(real_tag);
5107                                         if (id == -1) {
5108                                                 id = tags_add_tag(real_tag);
5109                                                 got_alien_tags = TRUE;
5110                                         }
5111                                         msginfo->tags = g_slist_append(
5112                                                                 msginfo->tags,
5113                                                                 GINT_TO_POINTER(id));
5114                                         g_free(real_tag);
5115                                 }
5116                                 slist_free_strings(tags);
5117                                 g_slist_free(tags);
5118                         }
5119                 }
5120
5121                 g_hash_table_insert(msgflags, msginfo, GINT_TO_POINTER(flags));
5122         }
5123
5124         if (got_alien_tags) {
5125                 tags_write_tags();
5126                 main_window_reflect_tags_changes(mainwindow_get_mainwindow());
5127         }
5128
5129         if (flags_hash)
5130                 g_hash_table_destroy(flags_hash);
5131         if (tags_hash)
5132                 g_hash_table_destroy(tags_hash);
5133
5134         imap_lep_set_free(seq_list);
5135         g_slist_free(flagged);
5136         g_slist_free(deleted);
5137         g_slist_free(answered);
5138         g_slist_free(forwarded);
5139         g_slist_free(spam);
5140         g_slist_free(unseen);
5141         g_slist_free(sorted_list);
5142
5143         stuff->done = TRUE;
5144         return GINT_TO_POINTER(0);
5145 }
5146
5147 static gint imap_get_flags(Folder *folder, FolderItem *item,
5148                            MsgInfoList *msginfo_list, GHashTable *msgflags)
5149 {
5150         gint result;
5151         get_flags_data *data = g_new0(get_flags_data, 1);
5152         data->done = FALSE;
5153         data->folder = folder;
5154         data->item = item;
5155         data->msginfo_list = msginfo_list;
5156         data->msgflags = msgflags;
5157         data->full_search = FALSE;
5158
5159         GSList *tmp = NULL, *cur;
5160
5161         if (prefs_common.work_offline &&
5162             !inc_offline_should_override(FALSE,
5163                 _("Claws Mail needs network access in order "
5164                   "to access the IMAP server."))) {
5165                 g_free(data);
5166                 return -1;
5167         }
5168
5169         tmp = folder_item_get_msg_list(item);
5170
5171         if (g_slist_length(tmp) <= g_slist_length(msginfo_list))
5172                 data->full_search = TRUE;
5173
5174         for (cur = tmp; cur; cur = cur->next)
5175                 procmsg_msginfo_free((MsgInfo *)cur->data);
5176
5177         g_slist_free(tmp);
5178
5179         result = GPOINTER_TO_INT(imap_get_flags_thread(data));
5180
5181         g_free(data);
5182         return result;
5183
5184 }
5185
5186 static gboolean process_flags(gpointer key, gpointer value, gpointer user_data)
5187 {
5188         gboolean flags_set = GPOINTER_TO_INT(user_data);
5189         gint flags_value = GPOINTER_TO_INT(key);
5190         hashtable_data *data = (hashtable_data *)value;
5191         IMAPFolderItem *_item = data->item;
5192         FolderItem *item = (FolderItem *)_item;
5193         gint ok = MAILIMAP_ERROR_BAD_STATE;
5194         IMAPSession *session = NULL;
5195
5196         debug_print("getting session...\n");
5197         session = imap_session_get(item->folder);
5198
5199         data->msglist = g_slist_reverse(data->msglist);
5200
5201         debug_print("IMAP %ssetting flags to %d for %d messages\n",
5202                 flags_set?"":"un",
5203                 flags_value,
5204                 g_slist_length(data->msglist));
5205
5206         lock_session(session);
5207         if (session) {
5208                 ok = imap_select(session, IMAP_FOLDER(item->folder), item,
5209                          NULL, NULL, NULL, NULL, NULL, FALSE);
5210         }
5211         if (ok == MAILIMAP_NO_ERROR) {
5212                 ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item),
5213                         data->msglist, flags_value, NULL, flags_set);
5214         } else {
5215                 g_warning("can't select mailbox %s\n", item->path);
5216         }
5217
5218         if (!is_fatal(ok))
5219                 unlock_session(session);
5220
5221         g_slist_free(data->msglist);
5222         g_free(data);
5223         return TRUE;
5224 }
5225
5226 static gboolean process_tags(gpointer key, gpointer value, gpointer user_data)
5227 {
5228         gboolean tags_set = GPOINTER_TO_INT(user_data);
5229         TagsData *data = (TagsData *)value;
5230         IMAPFolderItem *_item = data->item;
5231         FolderItem *item = (FolderItem *)_item;
5232         gchar *str = data->str;
5233         gint ok = MAILIMAP_ERROR_BAD_STATE;
5234         IMAPSession *session = NULL;
5235
5236         debug_print("getting session...\n");
5237         session = imap_session_get(item->folder);
5238
5239         data->msglist = g_slist_reverse(data->msglist);
5240
5241         debug_print("IMAP %ssetting tags %s for %d messages\n",
5242                 tags_set?"":"un",
5243                 str,
5244                 g_slist_length(data->msglist));
5245
5246         lock_session(session);
5247         if (session) {
5248                 ok = imap_select(session, IMAP_FOLDER(item->folder), item,
5249                          NULL, NULL, NULL, NULL, NULL, FALSE);
5250         }
5251         if (ok == MAILIMAP_NO_ERROR) {
5252                 GSList list;
5253                 list.data = str;
5254                 list.next = NULL;
5255                 ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item),
5256                         data->msglist, 0, &list, tags_set);
5257         } else {
5258                 g_warning("can't select mailbox %s\n", item->path);
5259         }
5260
5261         if (!is_fatal(ok))
5262                 unlock_session(session);
5263
5264         g_slist_free(data->msglist);
5265         g_free(data->str);
5266         g_free(data);
5267         return TRUE;
5268 }
5269
5270 static void process_hashtable(IMAPFolderItem *item)
5271 {
5272         if (item->flags_set_table) {
5273                 g_hash_table_foreach_remove(item->flags_set_table, process_flags, GINT_TO_POINTER(TRUE));
5274                 g_hash_table_destroy(item->flags_set_table);
5275                 item->flags_set_table = NULL;
5276         }
5277         if (item->flags_unset_table) {
5278                 g_hash_table_foreach_remove(item->flags_unset_table, process_flags, GINT_TO_POINTER(FALSE));
5279                 g_hash_table_destroy(item->flags_unset_table);
5280                 item->flags_unset_table = NULL;
5281         }
5282         if (item->tags_set_table) {
5283                 g_hash_table_foreach_remove(item->tags_set_table, process_tags, GINT_TO_POINTER(TRUE));
5284                 g_hash_table_destroy(item->tags_set_table);
5285                 item->tags_set_table = NULL;
5286         }
5287         if (item->tags_unset_table) {
5288                 g_hash_table_foreach_remove(item->tags_unset_table, process_tags, GINT_TO_POINTER(FALSE));
5289                 g_hash_table_destroy(item->tags_unset_table);
5290                 item->tags_unset_table = NULL;
5291         }
5292
5293 }
5294
5295 static void imap_set_batch (Folder *folder, FolderItem *_item, gboolean batch)
5296 {
5297         IMAPFolderItem *item = (IMAPFolderItem *)_item;
5298         IMAPSession *session;
5299
5300         g_return_if_fail(item != NULL);
5301
5302         if (item->batching == batch)
5303                 return;
5304
5305         if (batch) {
5306                 item->batching = TRUE;
5307                 debug_print("IMAP switching to batch mode\n");
5308                 if (!item->flags_set_table) {
5309                         item->flags_set_table = g_hash_table_new(NULL, g_direct_equal);
5310                 }
5311                 if (!item->flags_unset_table) {
5312                         item->flags_unset_table = g_hash_table_new(NULL, g_direct_equal);
5313                 }
5314                 if (!item->tags_set_table) {
5315                         item->tags_set_table = g_hash_table_new(NULL, g_direct_equal);
5316                 }
5317                 if (!item->tags_unset_table) {
5318                         item->tags_unset_table = g_hash_table_new(NULL, g_direct_equal);
5319                 }
5320                 session = imap_session_get(folder);
5321                 if (session) {
5322                         imap_refresh_sensitivity(session);
5323                         session->sens_update_block = TRUE;
5324                 }
5325         } else {
5326                 debug_print("IMAP switching away from batch mode\n");
5327                 /* process stuff */
5328                 process_hashtable(item);
5329                 item->batching = FALSE;
5330                 session = imap_session_get(folder);
5331                 if (session) {
5332                         session->sens_update_block = FALSE;
5333                         imap_refresh_sensitivity(session);
5334                 }
5335         }
5336 }
5337
5338
5339
5340 /* data types conversion libetpan <-> claws */
5341
5342
5343
5344 #define ETPAN_IMAP_MB_MARKED      1
5345 #define ETPAN_IMAP_MB_UNMARKED    2
5346 #define ETPAN_IMAP_MB_NOSELECT    4
5347 #define ETPAN_IMAP_MB_NOINFERIORS 8
5348
5349 static int imap_flags_to_flags(struct mailimap_mbx_list_flags * imap_flags)
5350 {
5351   int flags;
5352   clistiter * cur;
5353
5354   flags = 0;
5355   if (imap_flags->mbf_type == MAILIMAP_MBX_LIST_FLAGS_SFLAG) {
5356     switch (imap_flags->mbf_sflag) {
5357     case MAILIMAP_MBX_LIST_SFLAG_MARKED:
5358       flags |= ETPAN_IMAP_MB_MARKED;
5359       break;
5360     case MAILIMAP_MBX_LIST_SFLAG_NOSELECT:
5361       flags |= ETPAN_IMAP_MB_NOSELECT;
5362       break;
5363     case MAILIMAP_MBX_LIST_SFLAG_UNMARKED:
5364       flags |= ETPAN_IMAP_MB_UNMARKED;
5365       break;
5366     }
5367   }
5368
5369   if (imap_flags->mbf_oflags) {
5370     for(cur = clist_begin(imap_flags->mbf_oflags) ; cur != NULL ;
5371         cur = clist_next(cur)) {
5372       struct mailimap_mbx_list_oflag * oflag;
5373
5374       oflag = clist_content(cur);
5375
5376       switch (oflag->of_type) {
5377       case MAILIMAP_MBX_LIST_OFLAG_NOINFERIORS:
5378         flags |= ETPAN_IMAP_MB_NOINFERIORS;
5379         break;
5380       }
5381     }
5382   }
5383   return flags;
5384 }
5385
5386 static GSList * imap_list_from_lep(IMAPFolder * folder,
5387                                    clist * list, const gchar * real_path, gboolean all)
5388 {
5389         clistiter * iter;
5390         GSList * item_list = NULL, *llast = NULL;
5391
5392         if (list) {
5393                 for(iter = clist_begin(list) ; iter != NULL ;
5394                     iter = clist_next(iter)) {
5395                         struct mailimap_mailbox_list * mb;
5396                         int flags;
5397                         char delimiter;
5398                         char * name;
5399                         char * dup_name;
5400                         gchar * base;
5401                         gchar * loc_name;
5402                         gchar * loc_path;
5403                         FolderItem *new_item;
5404
5405                         mb = clist_content(iter);
5406
5407                         if (mb == NULL)
5408                                 continue;
5409
5410                         flags = 0;
5411                         if (mb->mb_flag != NULL)
5412                                 flags = imap_flags_to_flags(mb->mb_flag);
5413
5414                         delimiter = mb->mb_delimiter;
5415                         name = mb->mb_name;
5416
5417                         dup_name = strdup(name);
5418                         if (delimiter != '\0')
5419                                 subst_char(dup_name, delimiter, '/');
5420
5421                         base = g_path_get_basename(dup_name);
5422                         if (base[0] == '.') {
5423                                 g_free(base);
5424                                 free(dup_name);
5425                                 continue;
5426                         }
5427                         if (!all && path_cmp(name, real_path) == 0) {
5428                                 g_free(base);
5429                                 free(dup_name);
5430                                 continue;
5431                         }
5432
5433                         if (!all && dup_name[strlen(dup_name)-1] == '/') {
5434                                 dup_name[strlen(dup_name)-1] = '\0';
5435                         }
5436
5437                         loc_name = imap_modified_utf7_to_utf8(base, FALSE);
5438                         loc_path = imap_modified_utf7_to_utf8(dup_name, FALSE);
5439
5440                         new_item = folder_item_new(FOLDER(folder), loc_name, loc_path);
5441                         if ((flags & ETPAN_IMAP_MB_NOINFERIORS) != 0)
5442                                 new_item->no_sub = TRUE;
5443                         if (strcmp(dup_name, "INBOX") != 0 &&
5444                             ((flags & ETPAN_IMAP_MB_NOSELECT) != 0))
5445                                 new_item->no_select = TRUE;
5446
5447                         if (item_list == NULL)
5448                                 llast = item_list = g_slist_append(item_list, new_item);
5449                         else {
5450                                 llast = g_slist_append(llast, new_item);
5451                                 llast = llast->next;
5452                         }
5453                         debug_print("folder '%s' found.\n", loc_path);
5454                         g_free(base);
5455                         g_free(loc_path);
5456                         g_free(loc_name);
5457
5458                         free(dup_name);
5459                 }
5460         }
5461         return item_list;
5462 }
5463
5464 static GSList * imap_get_lep_set_from_numlist(IMAPFolder *folder, MsgNumberList *numlist)
5465 {
5466         GSList *sorted_list, *cur;
5467         guint first, last, next;
5468         GSList *ret_list = NULL, *llast = NULL;
5469         struct mailimap_set * current_set;
5470         unsigned int item_count;
5471
5472         if (numlist == NULL)
5473                 return NULL;
5474
5475         current_set = mailimap_set_new_empty();
5476
5477         sorted_list = g_slist_copy(numlist);
5478         sorted_list = g_slist_sort(sorted_list, g_int_compare);
5479
5480         first = GPOINTER_TO_INT(sorted_list->data);
5481
5482         item_count = 0;
5483         for (cur = sorted_list; cur != NULL; cur = g_slist_next(cur)) {
5484                 if (GPOINTER_TO_INT(cur->data) == 0)
5485                         continue;
5486
5487                 item_count ++;
5488
5489                 last = GPOINTER_TO_INT(cur->data);
5490                 if (cur->next)
5491                         next = GPOINTER_TO_INT(cur->next->data);
5492                 else
5493                         next = 0;
5494
5495                 if (last + 1 != next || next == 0 || item_count >= folder->max_set_size) {
5496
5497                         struct mailimap_set_item * item;
5498                         item = mailimap_set_item_new(first, last);
5499                         mailimap_set_add(current_set, item);
5500
5501                         first = next;
5502
5503                         if (item_count >= folder->max_set_size) {
5504                                 if (ret_list == NULL)
5505                                         llast = ret_list = g_slist_append(ret_list,
5506                                                           current_set);
5507                                 else {
5508                                         llast = g_slist_append(llast, current_set);
5509                                         llast = llast->next;
5510                                 }
5511
5512                                 current_set = mailimap_set_new_empty();
5513                                 item_count = 0;
5514                         }
5515                 }
5516         }
5517
5518         if (clist_count(current_set->set_list) > 0) {
5519                 ret_list = g_slist_append(ret_list,
5520                                           current_set);
5521         }
5522
5523         g_slist_free(sorted_list);
5524
5525         return ret_list;
5526 }
5527
5528 static GSList * imap_get_lep_set_from_msglist(IMAPFolder *folder, MsgInfoList *msglist)
5529 {
5530         MsgNumberList *numlist = NULL;
5531         GSList *seq_list;
5532
5533         numlist = procmsg_get_number_list_for_msgs(msglist);
5534
5535         seq_list = imap_get_lep_set_from_numlist(folder, numlist);
5536         g_slist_free(numlist);
5537
5538         return seq_list;
5539 }
5540
5541 static GSList * imap_uid_list_from_lep(clist * list, gint* length)
5542 {
5543         clistiter * iter;
5544         GSList * result;
5545         gint len = 0;
5546
5547         result = NULL;
5548
5549         if (list) {
5550                 for(iter = clist_begin(list) ; iter != NULL ;
5551                     iter = clist_next(iter)) {
5552                         uint32_t * puid;
5553
5554                         puid = clist_content(iter);
5555                         result = g_slist_prepend(result, GINT_TO_POINTER(* puid));
5556                         len++;
5557                 }
5558                 result = g_slist_reverse(result);
5559         }
5560         if (length)
5561                 *length = len;
5562         return result;
5563 }
5564
5565 static GSList * imap_uid_list_from_lep_tab(carray * list)
5566 {
5567         unsigned int i;
5568         GSList * result;
5569
5570         result = NULL;
5571
5572         for(i = 0 ; i < carray_count(list) ; i ++) {
5573                 uint32_t * puid;
5574
5575                 puid = carray_get(list, i);
5576                 result = g_slist_prepend(result, GINT_TO_POINTER(* puid));
5577         }
5578         result = g_slist_reverse(result);
5579         return result;
5580 }
5581
5582 static void imap_flags_hash_from_lep_uid_flags_tab(carray * list,
5583                                                    GHashTable * hash,
5584                                                    GHashTable * tags_hash)
5585 {
5586         unsigned int i;
5587
5588         for(i = 0 ; i < carray_count(list) ; i += 3) {
5589                 uint32_t * puid;
5590                 int * pflags;
5591                 GSList *tags;
5592
5593                 puid = carray_get(list, i);
5594                 pflags = carray_get(list, i + 1);
5595                 tags = carray_get(list, i + 2);
5596
5597                 g_hash_table_insert(hash, GINT_TO_POINTER(*puid), GINT_TO_POINTER(* pflags));
5598                 g_hash_table_insert(tags_hash, GINT_TO_POINTER(*puid), tags);
5599         }
5600 }
5601
5602 static MsgInfo *imap_envelope_from_lep(struct imap_fetch_env_info * info,
5603                                        FolderItem *item)
5604 {
5605         MsgInfo *msginfo = NULL;
5606         guint32 uid = 0;
5607         goffset size = 0;
5608         MsgFlags flags = {0, 0};
5609
5610         if (info->headers == NULL)
5611                 return NULL;
5612
5613         MSG_SET_TMP_FLAGS(flags, MSG_IMAP);
5614         if (folder_has_parent_of_type(item, F_QUEUE)) {
5615                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
5616         } else if (folder_has_parent_of_type(item, F_DRAFT)) {
5617                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
5618         }
5619         flags.perm_flags = info->flags;
5620
5621         uid = info->uid;
5622         size = (goffset) info->size;
5623         msginfo = procheader_parse_str(info->headers, flags, FALSE, FALSE);
5624
5625         if (msginfo) {
5626                 msginfo->msgnum = uid;
5627                 msginfo->size = size;
5628         }
5629
5630         return msginfo;
5631 }
5632
5633 static void imap_lep_set_free(GSList *seq_list)
5634 {
5635         GSList * cur;
5636
5637         for(cur = seq_list ; cur != NULL ; cur = g_slist_next(cur)) {
5638                 struct mailimap_set * imapset;
5639
5640                 imapset = cur->data;
5641                 mailimap_set_free(imapset);
5642         }
5643         g_slist_free(seq_list);
5644 }
5645
5646 static struct mailimap_flag_list * imap_flag_to_lep(IMAPFolderItem *item, IMAPFlags flags, GSList *tags)
5647 {
5648         struct mailimap_flag_list * flag_list;
5649         GSList *cur = tags;
5650
5651         flag_list = mailimap_flag_list_new_empty();
5652
5653         if (IMAP_IS_SEEN(flags))
5654                 mailimap_flag_list_add(flag_list,
5655                                        mailimap_flag_new_seen());
5656         if (IMAP_IS_ANSWERED(flags))
5657                 mailimap_flag_list_add(flag_list,
5658                                        mailimap_flag_new_answered());
5659         if (IMAP_IS_FLAGGED(flags))
5660                 mailimap_flag_list_add(flag_list,
5661                                        mailimap_flag_new_flagged());
5662         if (IMAP_IS_DELETED(flags))
5663                 mailimap_flag_list_add(flag_list,
5664                                        mailimap_flag_new_deleted());
5665         if (IMAP_IS_DRAFT(flags))
5666                 mailimap_flag_list_add(flag_list,
5667                                        mailimap_flag_new_draft());
5668         if (IMAP_IS_FORWARDED(flags) && flag_ok(item, IMAP_FLAG_FORWARDED))
5669                 mailimap_flag_list_add(flag_list,
5670                                        mailimap_flag_new_flag_keyword(strdup(RTAG_FORWARDED)));
5671         if (IMAP_IS_SPAM(flags) && flag_ok(item, IMAP_FLAG_SPAM))
5672                 mailimap_flag_list_add(flag_list,
5673                                        mailimap_flag_new_flag_keyword(strdup(RTAG_JUNK)));
5674         else if (IMAP_IS_HAM(flags) && flag_ok(item, IMAP_FLAG_HAM))
5675                 mailimap_flag_list_add(flag_list,
5676                                        mailimap_flag_new_flag_keyword(strdup(RTAG_NON_JUNK)));
5677
5678         for (; cur; cur = cur->next) {
5679                 gchar *enc_str =
5680                         imap_utf8_to_modified_utf7(cur->data, TRUE);
5681                 g_strstrip(enc_str);
5682
5683                 mailimap_flag_list_add(flag_list,
5684                         mailimap_flag_new_flag_keyword(enc_str));
5685         }
5686
5687         return flag_list;
5688 }
5689
5690 guint imap_folder_get_refcnt(Folder *folder)
5691 {
5692         return ((IMAPFolder *)folder)->refcnt;
5693 }
5694
5695 void imap_folder_ref(Folder *folder)
5696 {
5697         ((IMAPFolder *)folder)->refcnt++;
5698 }
5699
5700 void imap_disconnect_all(gboolean have_connectivity)
5701 {
5702         GList *list;
5703         gboolean short_timeout;
5704 #ifdef HAVE_NETWORKMANAGER_SUPPORT
5705         GError *error;
5706 #endif
5707
5708 #ifdef HAVE_NETWORKMANAGER_SUPPORT
5709         error = NULL;
5710         short_timeout = !networkmanager_is_online(&error);
5711         if(error) {
5712                 short_timeout = TRUE;
5713                 g_error_free(error);
5714         }
5715 #else
5716         short_timeout = TRUE;
5717 #endif
5718
5719         if(short_timeout)
5720                 imap_main_set_timeout(1);
5721
5722         for (list = account_get_list(); list != NULL; list = list->next) {
5723                 PrefsAccount *account = list->data;
5724                 if (account->protocol == A_IMAP4) {
5725                         RemoteFolder *folder = (RemoteFolder *)account->folder;
5726                         if (folder && folder->session) {
5727                                 IMAPSession *session = (IMAPSession *)folder->session;
5728                                 if (have_connectivity)
5729                                         imap_threaded_disconnect(FOLDER(folder));
5730                                 SESSION(session)->state = SESSION_DISCONNECTED;
5731                                 SESSION(session)->sock = NULL;
5732                                 session_destroy(SESSION(session));
5733                                 folder->session = NULL;
5734                         }
5735                 }
5736         }
5737
5738         if(short_timeout)
5739                 imap_main_set_timeout(prefs_common.io_timeout_secs);
5740 }
5741
5742 void imap_folder_unref(Folder *folder)
5743 {
5744         if (((IMAPFolder *)folder)->refcnt > 0)
5745                 ((IMAPFolder *)folder)->refcnt--;
5746 }
5747
5748 void imap_cancel_all(void)
5749 {
5750         GList *folderlist;
5751         GList *cur;
5752
5753         folderlist = folder_get_list();
5754         for (cur = folderlist; cur != NULL; cur = g_list_next(cur)) {
5755                 Folder *folder = (Folder *) cur->data;
5756
5757                 if (folder->klass == &imap_class) {
5758                         if (imap_is_busy(folder)) {
5759                                 IMAPSession *imap_session;
5760                                 RemoteFolder *rfolder;
5761
5762                                 g_printerr("cancelled\n");
5763                                 imap_threaded_cancel(folder);
5764                                 rfolder = (RemoteFolder *) folder;
5765                                 imap_session = (IMAPSession *) rfolder->session;
5766                                 if (imap_session)
5767                                         imap_session->cancelled = 1;
5768                         }
5769                 }
5770         }
5771 }
5772
5773 gboolean imap_cancel_all_enabled(void)
5774 {
5775         GList *folderlist;
5776         GList *cur;
5777
5778         folderlist = folder_get_list();
5779         for (cur = folderlist; cur != NULL; cur = g_list_next(cur)) {
5780                 Folder *folder = (Folder *) cur->data;
5781
5782                 if (folder->klass == &imap_class) {
5783                         if (imap_is_busy(folder)) {
5784                                 return TRUE;
5785                         }
5786                 }
5787         }
5788
5789         return FALSE;
5790 }
5791
5792 static gboolean imap_is_busy(Folder *folder)
5793 {
5794         IMAPSession *imap_session;
5795         RemoteFolder *rfolder;
5796
5797         rfolder = (RemoteFolder *) folder;
5798         imap_session = (IMAPSession *) rfolder->session;
5799         if (imap_session == NULL)
5800                 return FALSE;
5801
5802         return imap_session->busy;
5803 }
5804
5805 #else /* HAVE_LIBETPAN */
5806
5807 static FolderClass imap_class;
5808
5809 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item);
5810 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag);
5811
5812 static Folder   *imap_folder_new        (const gchar    *name,
5813                                          const gchar    *path)
5814 {
5815         static gboolean missing_imap_warning = TRUE;
5816         if (missing_imap_warning) {
5817                 missing_imap_warning = FALSE;
5818                 alertpanel_error(
5819                         _("You have one or more IMAP accounts "
5820                           "defined. However this version of "
5821                           "Claws Mail has been built without "
5822                           "IMAP support; your IMAP account(s) are "
5823                           "disabled.\n\n"
5824                           "You probably need to "
5825                           "install libetpan and recompile "
5826                           "Claws Mail."));
5827         }
5828         return NULL;
5829 }
5830 static gint     imap_create_tree        (Folder         *folder)
5831 {
5832         return -1;
5833 }
5834 static FolderItem *imap_create_folder   (Folder         *folder,
5835                                          FolderItem     *parent,
5836                                          const gchar    *name)
5837 {
5838         return NULL;
5839 }
5840 static gint     imap_rename_folder      (Folder         *folder,
5841                                          FolderItem     *item,
5842                                          const gchar    *name)
5843 {
5844         return -1;
5845 }
5846
5847 gchar imap_get_path_separator_for_item(FolderItem *item)
5848 {
5849         return '/';
5850 }
5851
5852 FolderClass *imap_get_class(void)
5853 {
5854         if (imap_class.idstr == NULL) {
5855                 imap_class.type = F_IMAP;
5856                 imap_class.idstr = "imap";
5857                 imap_class.uistr = "IMAP4";
5858
5859                 imap_class.new_folder = imap_folder_new;
5860                 imap_class.create_tree = imap_create_tree;
5861                 imap_class.create_folder = imap_create_folder;
5862                 imap_class.rename_folder = imap_rename_folder;
5863
5864                 imap_class.set_xml = folder_set_xml;
5865                 imap_class.get_xml = folder_get_xml;
5866                 imap_class.item_set_xml = imap_item_set_xml;
5867                 imap_class.item_get_xml = imap_item_get_xml;
5868                 /* nothing implemented */
5869         }
5870
5871         return &imap_class;
5872 }
5873
5874 void imap_disconnect_all(gboolean have_connectivity)
5875 {
5876 }
5877
5878 gint imap_subscribe(Folder *folder, FolderItem *item, gchar *rpath, gboolean sub)
5879 {
5880         return -1;
5881 }
5882
5883 GList * imap_scan_subtree(Folder *folder, FolderItem *item, gboolean unsubs_only, gboolean recursive)
5884 {
5885         return NULL;
5886 }
5887
5888 void imap_cache_msg(FolderItem *item, gint msgnum)
5889 {
5890 }
5891
5892 void imap_cancel_all(void)
5893 {
5894 }
5895
5896 gboolean imap_cancel_all_enabled(void)
5897 {
5898         return FALSE;
5899 }
5900
5901 #endif
5902
5903 #ifdef HAVE_LIBETPAN
5904 static void imap_synchronise(FolderItem *item, gint days)
5905 {
5906         if (IMAP_FOLDER_ITEM(item)->last_sync == IMAP_FOLDER_ITEM(item)->last_change) {
5907                 debug_print("%s already synced\n", item->path?item->path:item->name);
5908                 return;
5909         }
5910         debug_print("syncing %s\n", item->path?item->path:item->name);
5911         imap_gtk_synchronise(item, days);
5912         IMAP_FOLDER_ITEM(item)->last_sync = IMAP_FOLDER_ITEM(item)->last_change;
5913 }
5914 #endif
5915
5916 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag)
5917 {
5918 #ifdef HAVE_LIBETPAN
5919         GList *cur;
5920 #endif
5921         folder_item_set_xml(folder, item, tag);
5922
5923 #ifdef HAVE_LIBETPAN
5924         for (cur = tag->attr; cur != NULL; cur = g_list_next(cur)) {
5925                 XMLAttr *attr = (XMLAttr *) cur->data;
5926
5927                 if (!attr || !attr->name || !attr->value) continue;
5928                 if (!strcmp(attr->name, "uidnext"))
5929                         IMAP_FOLDER_ITEM(item)->uid_next = atoi(attr->value);
5930                 if (!strcmp(attr->name, "last_sync"))
5931                         IMAP_FOLDER_ITEM(item)->last_sync = atoi(attr->value);
5932                 if (!strcmp(attr->name, "last_change"))
5933                         IMAP_FOLDER_ITEM(item)->last_change = atoi(attr->value);
5934         }
5935         if (IMAP_FOLDER_ITEM(item)->last_change == 0)
5936                 IMAP_FOLDER_ITEM(item)->last_change = time(NULL);
5937 #endif
5938 }
5939
5940 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item)
5941 {
5942         XMLTag *tag;
5943
5944         tag = folder_item_get_xml(folder, item);
5945
5946 #ifdef HAVE_LIBETPAN
5947         xml_tag_add_attr(tag, xml_attr_new_int("uidnext",
5948                         IMAP_FOLDER_ITEM(item)->uid_next));
5949         xml_tag_add_attr(tag, xml_attr_new_int("last_sync",
5950                         IMAP_FOLDER_ITEM(item)->last_sync));
5951         xml_tag_add_attr(tag, xml_attr_new_int("last_change",
5952                         IMAP_FOLDER_ITEM(item)->last_change));
5953
5954 #endif
5955         return tag;
5956 }
5957
5958 /* ===================================================================
5959  * UTF-7 conversion routines as in RFC 2192
5960  * ===================================================================
5961  * These two functions from:
5962  * libimap library.
5963  * Copyright (C) 2003-2004 Pawel Salek. */
5964
5965 /* UTF7 modified base64 alphabet */
5966 static char base64chars[] =
5967   "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+,";
5968 #define UNDEFINED 64
5969
5970 /* UTF16 definitions */
5971 #define UTF16MASK       0x03FFUL
5972 #define UTF16SHIFT      10
5973 #define UTF16BASE       0x10000UL
5974 #define UTF16HIGHSTART  0xD800UL
5975 #define UTF16HIGHEND    0xDBFFUL
5976 #define UTF16LOSTART    0xDC00UL
5977 #define UTF16LOEND      0xDFFFUL
5978
5979
5980 /* Convert an IMAP mailbox to a UTF-8 string.
5981  *  dst needs to have roughly 4 times the storage space of src
5982  *    Hex encoding can triple the size of the input
5983  *    UTF-7 can be slightly denser than UTF-8
5984  *     (worst case: 8 octets UTF-7 becomes 9 octets UTF-8)
5985  */
5986 char* imap_modified_utf7_to_utf8(const char *mbox, gboolean change_spaces)
5987 {
5988   unsigned c, i, bitcount;
5989   unsigned long ucs4, utf16, bitbuf;
5990   unsigned char base64[256];
5991   const char *src;
5992   char *dst, *res  = g_malloc(2*strlen(mbox)+1);
5993
5994   dst = res;
5995   src = mbox;
5996   if(!dst) return NULL;
5997   /* initialize modified base64 decoding table */
5998   memset(base64, UNDEFINED, sizeof (base64));
5999   for (i = 0; i < sizeof (base64chars); ++i) {
6000     base64[(unsigned)base64chars[i]] = i;
6001   }
6002
6003   /* loop until end of string */
6004   while (*src != '\0') {
6005     c = *src++;
6006     /* deal with literal characters and &- */
6007     if (c != '&' || *src == '-') {
6008       /* encode literally */
6009       if (change_spaces && c == '_')
6010         *dst++ = ' ';
6011       else
6012         *dst++ = c;
6013       /* skip over the '-' if this is an &- sequence */
6014       if (c == '&') ++src;
6015     } else {
6016       /* convert modified UTF-7 -> UTF-16 -> UCS-4 -> UTF-8 -> HEX */
6017       bitbuf = 0;
6018       bitcount = 0;
6019       ucs4 = 0;
6020       while ((c = base64[(unsigned char) *src]) != UNDEFINED) {
6021         ++src;
6022         bitbuf = (bitbuf << 6) | c;
6023         bitcount += 6;
6024         /* enough bits for a UTF-16 character? */
6025         if (bitcount >= 16) {
6026           bitcount -= 16;
6027           utf16 = (bitcount ? bitbuf >> bitcount
6028                    : bitbuf) & 0xffff;
6029           /* convert UTF16 to UCS4 */
6030           if
6031             (utf16 >= UTF16HIGHSTART && utf16 <= UTF16HIGHEND) {
6032             ucs4 = (utf16 - UTF16HIGHSTART) << UTF16SHIFT;
6033             continue;
6034           } else if
6035             (utf16 >= UTF16LOSTART && utf16 <= UTF16LOEND) {
6036             ucs4 += utf16 - UTF16LOSTART + UTF16BASE;
6037           } else {
6038             ucs4 = utf16;
6039           }
6040
6041           /* convert UTF-16 range of UCS4 to UTF-8 */
6042           if (ucs4 <= 0x7fUL) {
6043             dst[0] = ucs4;
6044             dst += 1;
6045           } else if (ucs4 <= 0x7ffUL) {
6046             dst[0] = 0xc0 | (ucs4 >> 6);
6047             dst[1] = 0x80 | (ucs4 & 0x3f);
6048             dst += 2;
6049           } else if (ucs4 <= 0xffffUL) {
6050             dst[0] = 0xe0 | (ucs4 >> 12);
6051             dst[1] = 0x80 | ((ucs4 >> 6) & 0x3f);
6052             dst[2] = 0x80 | (ucs4 & 0x3f);
6053             dst += 3;
6054           } else {
6055             dst[0] = 0xf0 | (ucs4 >> 18);
6056             dst[1] = 0x80 | ((ucs4 >> 12) & 0x3f);
6057             dst[2] = 0x80 | ((ucs4 >> 6) & 0x3f);
6058             dst[3] = 0x80 | (ucs4 & 0x3f);
6059             dst += 4;
6060           }
6061         }
6062       }
6063       /* skip over trailing '-' in modified UTF-7 encoding */
6064       if (*src == '-') ++src;
6065     }
6066   }
6067   /* terminate destination string */
6068   *dst = '\0';
6069   return res;
6070 }
6071
6072 /* Convert hex coded UTF-8 string to modified UTF-7 IMAP mailbox
6073  *  dst should be about twice the length of src to deal with non-hex
6074  *  coded URLs
6075  */
6076 char* imap_utf8_to_modified_utf7(const char *src, gboolean change_spaces)
6077 {
6078   unsigned int utf8pos, utf8total, c, utf7mode, bitstogo, utf16flag;
6079   unsigned long ucs4 = 0, bitbuf = 0;
6080
6081   /* initialize hex lookup table */
6082   char *dst, *res;
6083
6084   if (!src) return NULL;
6085
6086   res = malloc(2*strlen(src)+1);
6087   dst = res;
6088   if(!dst) return NULL;
6089
6090   utf7mode = 0;
6091   utf8total = 0;
6092   bitstogo = 0;
6093   utf8pos = 0;
6094   while ((c = (unsigned char)*src) != '\0') {
6095     ++src;
6096     /* normal character? */
6097     if (c >= ' ' && c <= '~' && (c != '_' || !change_spaces)) {
6098       /* switch out of UTF-7 mode */
6099       if (utf7mode) {
6100         if (bitstogo) {
6101           *dst++ = base64chars[(bitbuf << (6 - bitstogo)) & 0x3F];
6102         }
6103         *dst++ = '-';
6104         utf7mode = 0;
6105         utf8pos  = 0;
6106         bitstogo = 0;
6107         utf8total= 0;
6108       }
6109       if (change_spaces && c == ' ')
6110         *dst++ = '_';
6111       else
6112         *dst++ = c;
6113       /* encode '&' as '&-' */
6114       if (c == '&') {
6115         *dst++ = '-';
6116       }
6117       continue;
6118     }
6119     /* switch to UTF-7 mode */
6120     if (!utf7mode) {
6121       *dst++ = '&';
6122       utf7mode = 1;
6123     }
6124     /* Encode US-ASCII characters as themselves */
6125     if (c < 0x80) {
6126       ucs4 = c;
6127     } else if (utf8total) {
6128       /* save UTF8 bits into UCS4 */
6129       ucs4 = (ucs4 << 6) | (c & 0x3FUL);
6130       if (++utf8pos < utf8total) {
6131         continue;
6132       }
6133     } else {
6134       utf8pos = 1;
6135       if (c < 0xE0) {
6136         utf8total = 2;
6137         ucs4 = c & 0x1F;
6138       } else if (c < 0xF0) {
6139         utf8total = 3;
6140         ucs4 = c & 0x0F;
6141       } else {
6142         /* NOTE: can't convert UTF8 sequences longer than 4 */
6143         utf8total = 4;
6144         ucs4 = c & 0x03;
6145       }
6146       continue;
6147     }
6148     /* loop to split ucs4 into two utf16 chars if necessary */
6149     utf8total = 0;
6150     do {
6151       if (ucs4 >= UTF16BASE) {
6152         ucs4 -= UTF16BASE;
6153         bitbuf = (bitbuf << 16) | ((ucs4 >> UTF16SHIFT)
6154                                    + UTF16HIGHSTART);
6155         ucs4 = (ucs4 & UTF16MASK) + UTF16LOSTART;
6156         utf16flag = 1;
6157       } else {
6158         bitbuf = (bitbuf << 16) | ucs4;
6159         utf16flag = 0;
6160       }
6161       bitstogo += 16;
6162       /* spew out base64 */
6163       while (bitstogo >= 6) {
6164         bitstogo -= 6;
6165         *dst++ = base64chars[(bitstogo ? (bitbuf >> bitstogo)
6166                               : bitbuf)
6167                              & 0x3F];
6168       }
6169     } while (utf16flag);
6170   }
6171   /* if in UTF-7 mode, finish in ASCII */
6172   if (utf7mode) {
6173     if (bitstogo) {
6174       *dst++ = base64chars[(bitbuf << (6 - bitstogo)) & 0x3F];
6175     }
6176     *dst++ = '-';
6177   }
6178   /* tie off string */
6179   *dst = '\0';
6180   return res;
6181 }