src/imap.c

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