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