src/imap.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2007 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 #if (defined(USE_OPENSSL) || defined (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 #if (defined(USE_OPENSSL) || defined (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 #if (defined(USE_OPENSSL) || defined (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 #if (defined(USE_OPENSSL) || defined (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) {
 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 #if (defined(USE_OPENSSL) || defined (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 #if (defined(USE_OPENSSL) || defined (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 #if (defined(USE_OPENSSL) || defined (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 #if (defined(USE_OPENSSL) || defined (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 && account->imap_auth_type != IMAP_AUTH_GSSAPI) {
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 || account->imap_auth_type == IMAP_AUTH_GSSAPI) {
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         for (list = clist_begin(set->set_list); list; list = clist_next(list)) {
1702                 struct mailimap_set_item *item = (struct mailimap_set_item *)clist_content(list);
1703                 start = item->set_first;
1704                 end = item->set_last;
1705                 for (t = start; t <= end; t++) {
1706                         result = g_slist_prepend(result, GINT_TO_POINTER(t));
1707                 }
1708         }
1709         result = g_slist_reverse(result);
1710         if (debug_get_mode()) {
1711                 debug_print("flat imap set: ");
1712                 for (cur = result; cur; cur = cur->next) {
1713                         debug_print("%d ", GPOINTER_TO_INT(cur->data));
1714                 }
1715                 debug_print("\n");
1716         }
1717
1718         return result;
1719 }
1720 static gint imap_do_copy_msgs(Folder *folder, FolderItem *dest,
1721                               MsgInfoList *msglist, GRelation *relation)
1722 {
1723         FolderItem *src;
1724         gchar *destdir;
1725         GSList *seq_list, *cur;
1726         MsgInfo *msginfo;
1727         IMAPSession *session;
1728         gint ok = MAILIMAP_NO_ERROR;
1729         GRelation *uid_mapping;
1730         gint last_num = 0;
1731         gboolean single = FALSE;
1732
1733         g_return_val_if_fail(folder != NULL, -1);
1734         g_return_val_if_fail(dest != NULL, -1);
1735         g_return_val_if_fail(msglist != NULL, -1);
1736
1737         debug_print("getting session...\n");
1738         session = imap_session_get(folder);
1739
1740         if (!session) {
1741                 return -1;
1742         }
1743
1744         msginfo = (MsgInfo *)msglist->data;
1745         if (msglist->next == NULL)
1746                 single = TRUE;
1747         src = msginfo->folder;
1748         if (src == dest) {
1749                 g_warning("the src folder is identical to the dest.\n");
1750                 return -1;
1751         }
1752
1753         if (src->folder != dest->folder) {
1754                 GSList *infolist = NULL, *cur;
1755                 int res = -1;
1756                 for (cur = msglist; cur; cur = cur->next) {
1757                         msginfo = (MsgInfo *)cur->data;
1758                         MsgFileInfo *fileinfo = g_new0(MsgFileInfo, 1);
1759                         fileinfo->file = procmsg_get_message_file(msginfo);
1760                         fileinfo->flags = &(msginfo->flags);
1761                         infolist = g_slist_prepend(infolist, fileinfo);
1762                 }
1763                 infolist = g_slist_reverse(infolist);
1764                 res = folder_item_add_msgs(dest, infolist, FALSE);
1765                 for (cur = infolist; cur; cur = cur->next) {
1766                         MsgFileInfo *info = (MsgFileInfo *)cur->data;
1767                         g_free(info->file);
1768                         g_free(info);
1769                 }
1770                 g_slist_free(infolist);
1771                 return res;
1772         }
1773
1774         lock_session(session); /* unlocked later in the function */
1775
1776         ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
1777                          NULL, NULL, NULL, NULL, NULL, FALSE);
1778         if (ok != MAILIMAP_NO_ERROR) {
1779                 return ok;
1780         }
1781
1782         unlock_session(session);
1783
1784         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
1785
1786         if (is_fatal(ok))
1787                 return ok;
1788
1789         seq_list = imap_get_lep_set_from_msglist(IMAP_FOLDER(folder), msglist);
1790         uid_mapping = g_relation_new(2);
1791         g_relation_index(uid_mapping, 0, g_direct_hash, g_direct_equal);
1792
1793         statusbar_print_all(_("Copying messages..."));
1794         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
1795                 struct mailimap_set * seq_set;
1796                 struct mailimap_set * source = NULL;
1797                 struct mailimap_set * dest = NULL;
1798                 seq_set = cur->data;
1799
1800                 debug_print("Copying messages from %s to %s ...\n",
1801                             src->path, destdir);
1802
1803                 lock_session(session); /* unlocked later in the function */
1804                 ok = imap_cmd_copy(session, seq_set, destdir, uid_mapping,
1805                         &source, &dest);
1806
1807                 if (is_fatal(ok)) {
1808                         session = NULL;
1809                 }
1810
1811                 if (ok == MAILIMAP_NO_ERROR) {
1812                         unlock_session(session);
1813                         if (relation && source && dest) {
1814                                 GSList *s_list = flatten_mailimap_set(source);
1815                                 GSList *d_list = flatten_mailimap_set(dest);
1816                                 GSList *s_cur, *d_cur;
1817                                 if (g_slist_length(s_list) == g_slist_length(d_list)) {
1818
1819                                         for (s_cur = s_list, d_cur = d_list;
1820                                              s_cur && d_cur;
1821                                              s_cur = s_cur->next, d_cur = d_cur->next) {
1822                                                 g_relation_insert(uid_mapping, s_cur->data, d_cur->data);
1823                                         }
1824
1825                                 } else {
1826                                         debug_print("hhhmm, source list length != dest list length.\n");
1827                                 }
1828                                 g_slist_free(s_list);
1829                                 g_slist_free(d_list);
1830                         }
1831                 }
1832
1833
1834                 if (source)
1835                         mailimap_set_free(source);
1836                 if (dest)
1837                         mailimap_set_free(dest);
1838
1839                 if (ok != MAILIMAP_NO_ERROR) {
1840                         g_relation_destroy(uid_mapping);
1841                         imap_lep_set_free(seq_list);
1842                         statusbar_pop_all();
1843                         return -1;
1844                 }
1845         }
1846
1847         for (cur = msglist; cur != NULL; cur = g_slist_next(cur)) {
1848                 MsgInfo *msginfo = (MsgInfo *)cur->data;
1849                 GTuples *tuples;
1850
1851                 tuples = g_relation_select(uid_mapping,
1852                                            GINT_TO_POINTER(msginfo->msgnum),
1853                                            0);
1854                 if (tuples->len > 0) {
1855                         gint num = GPOINTER_TO_INT(g_tuples_index(tuples, 0, 1));
1856                         g_relation_insert(relation, msginfo,
1857                                           GINT_TO_POINTER(num));
1858                         if (num > last_num)
1859                                 last_num = num;
1860                         debug_print("copied message %d as %d\n", msginfo->msgnum, num);
1861                         /* put the local file in the imapcache, so that we don't
1862                          * have to fetch it back later. */
1863                         if (num > 0) {
1864                                 gchar *cache_path = folder_item_get_path(msginfo->folder);
1865                                 gchar *real_file = g_strconcat(
1866                                         cache_path, G_DIR_SEPARATOR_S,
1867                                         itos(msginfo->msgnum), NULL);
1868                                 gchar *cache_file = NULL;
1869                                 g_free(cache_path);
1870                                 cache_path = folder_item_get_path(dest);
1871                                 cache_file = g_strconcat(
1872                                         cache_path, G_DIR_SEPARATOR_S,
1873                                         itos(num), NULL);
1874                                 if (!is_dir_exist(cache_path))
1875                                         make_dir_hier(cache_path);
1876                                 if (is_file_exist(real_file) && is_dir_exist(cache_path)) {
1877                                         copy_file(real_file, cache_file, TRUE);
1878                                         debug_print("copied to cache: %s\n", cache_file);
1879                                 }
1880                                 g_free(real_file);
1881                                 g_free(cache_file);
1882                                 g_free(cache_path);
1883                         }
1884                 } else
1885                         g_relation_insert(relation, msginfo,
1886                                           GINT_TO_POINTER(0));
1887                 g_tuples_destroy(tuples);
1888         }
1889         statusbar_pop_all();
1890
1891         g_relation_destroy(uid_mapping);
1892         imap_lep_set_free(seq_list);
1893
1894         g_free(destdir);
1895
1896         IMAP_FOLDER_ITEM(dest)->lastuid = 0;
1897         IMAP_FOLDER_ITEM(dest)->uid_next = 0;
1898         g_slist_free(IMAP_FOLDER_ITEM(dest)->uid_list);
1899         IMAP_FOLDER_ITEM(dest)->uid_list = NULL;
1900
1901         imap_scan_required(folder, dest);
1902         if (ok == MAILIMAP_NO_ERROR)
1903                 return last_num;
1904         else
1905                 return -1;
1906 }
1907
1908 static gint imap_copy_msg(Folder *folder, FolderItem *dest, MsgInfo *msginfo)
1909 {
1910         GSList msglist;
1911
1912         g_return_val_if_fail(msginfo != NULL, -1);
1913
1914         msglist.data = msginfo;
1915         msglist.next = NULL;
1916
1917         return imap_copy_msgs(folder, dest, &msglist, NULL);
1918 }
1919
1920 static gint imap_copy_msgs(Folder *folder, FolderItem *dest,
1921                     MsgInfoList *msglist, GRelation *relation)
1922 {
1923         MsgInfo *msginfo;
1924         gint ret;
1925
1926         g_return_val_if_fail(folder != NULL, -1);
1927         g_return_val_if_fail(dest != NULL, -1);
1928         g_return_val_if_fail(msglist != NULL, -1);
1929
1930         msginfo = (MsgInfo *)msglist->data;
1931         g_return_val_if_fail(msginfo->folder != NULL, -1);
1932
1933         ret = imap_do_copy_msgs(folder, dest, msglist, relation);
1934         return ret;
1935 }
1936
1937
1938 static gint imap_do_remove_msgs(Folder *folder, FolderItem *dest,
1939                                 MsgInfoList *msglist, GRelation *relation)
1940 {
1941         gchar *destdir, *dir;
1942         GSList *numlist = NULL, *cur;
1943         MsgInfo *msginfo;
1944         IMAPSession *session;
1945         gint ok = MAILIMAP_NO_ERROR;
1946         GRelation *uid_mapping;
1947
1948         g_return_val_if_fail(folder != NULL, -1);
1949         g_return_val_if_fail(dest != NULL, -1);
1950         g_return_val_if_fail(msglist != NULL, -1);
1951
1952         debug_print("getting session...\n");
1953         session = imap_session_get(folder);
1954         if (!session) {
1955                 return -1;
1956         }
1957
1958         lock_session(session); /* unlocked later in the function */
1959
1960         msginfo = (MsgInfo *)msglist->data;
1961
1962         ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
1963                          NULL, NULL, NULL, NULL, NULL, FALSE);
1964         if (ok != MAILIMAP_NO_ERROR) {
1965                 return ok;
1966         }
1967
1968         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
1969         if (is_fatal(ok))
1970                 return ok;
1971         for (cur = msglist; cur; cur = cur->next) {
1972                 msginfo = (MsgInfo *)cur->data;
1973                 if (!MSG_IS_DELETED(msginfo->flags))
1974                         numlist = g_slist_prepend(numlist, GINT_TO_POINTER(msginfo->msgnum));
1975         }
1976         numlist = g_slist_reverse(numlist);
1977
1978         uid_mapping = g_relation_new(2);
1979         g_relation_index(uid_mapping, 0, g_direct_hash, g_direct_equal);
1980
1981         if (numlist != NULL) {
1982                 ok = imap_set_message_flags
1983                         (session, IMAP_FOLDER_ITEM(msginfo->folder), numlist, IMAP_FLAG_DELETED, NULL, TRUE);
1984                 if (ok != MAILIMAP_NO_ERROR) {
1985                         log_warning(LOG_PROTOCOL, _("can't set deleted flags\n"));
1986                         return ok;
1987                 }
1988         } /* else we just need to expunge */
1989         ok = imap_cmd_expunge(session);
1990         if (ok != MAILIMAP_NO_ERROR) {
1991                 log_warning(LOG_PROTOCOL, _("can't expunge\n"));
1992                 return ok;
1993         }
1994
1995         session->folder_content_changed = TRUE;
1996         unlock_session(session);
1997
1998         dir = folder_item_get_path(msginfo->folder);
1999         if (is_dir_exist(dir)) {
2000                 for (cur = msglist; cur; cur = cur->next) {
2001                         msginfo = (MsgInfo *)cur->data;
2002                         remove_numbered_files(dir, msginfo->msgnum, msginfo->msgnum);
2003                 }
2004         }
2005         g_free(dir);
2006
2007         g_relation_destroy(uid_mapping);
2008         g_slist_free(numlist);
2009
2010         imap_scan_required(folder, dest);
2011
2012         g_free(destdir);
2013         if (ok == MAILIMAP_NO_ERROR)
2014                 return 0;
2015         else
2016                 return -1;
2017 }
2018
2019 static gint imap_remove_msgs(Folder *folder, FolderItem *dest,
2020                     MsgInfoList *msglist, GRelation *relation)
2021 {
2022         MsgInfo *msginfo;
2023
2024         g_return_val_if_fail(folder != NULL, -1);
2025         g_return_val_if_fail(dest != NULL, -1);
2026         if (msglist == NULL)
2027                 return 0;
2028
2029         msginfo = (MsgInfo *)msglist->data;
2030         g_return_val_if_fail(msginfo->folder != NULL, -1);
2031
2032         return imap_do_remove_msgs(folder, dest, msglist, relation);
2033 }
2034
2035 static gint imap_remove_all_msg(Folder *folder, FolderItem *item)
2036 {
2037         GSList *list = folder_item_get_msg_list(item);
2038         gint res = imap_remove_msgs(folder, item, list, NULL);
2039         procmsg_msg_list_free(list);
2040         return res;
2041 }
2042
2043 static gboolean imap_is_msg_changed(Folder *folder, FolderItem *item,
2044                                     MsgInfo *msginfo)
2045 {
2046         /* TODO: properly implement this method */
2047         return FALSE;
2048 }
2049
2050 static gint imap_close(Folder *folder, FolderItem *item)
2051 {
2052         return 0;
2053 }
2054
2055 static gint imap_scan_tree_real(Folder *folder, gboolean subs_only)
2056 {
2057         FolderItem *item = NULL;
2058         IMAPSession *session;
2059         gchar *root_folder = NULL;
2060
2061         g_return_val_if_fail(folder != NULL, -1);
2062         g_return_val_if_fail(folder->account != NULL, -1);
2063
2064         debug_print("getting session...\n");
2065         session = imap_session_get(folder);
2066         if (!session) {
2067                 if (!folder->node) {
2068                         folder_tree_destroy(folder);
2069                         item = folder_item_new(folder, folder->name, NULL);
2070                         item->folder = folder;
2071                         folder->node = item->node = g_node_new(item);
2072                 }
2073                 return -1;
2074         }
2075
2076         if (folder->account->imap_dir && *folder->account->imap_dir) {
2077                 gchar *real_path;
2078                 int r;
2079                 clist * lep_list;
2080
2081                 Xstrdup_a(root_folder, folder->account->imap_dir, {return -1;});
2082                 extract_quote(root_folder, '"');
2083                 subst_char(root_folder,
2084                            imap_get_path_separator(session, IMAP_FOLDER(folder),
2085                                                    root_folder, &r),
2086                            '/');
2087                 if (is_fatal(r))
2088                         return -1;
2089                 strtailchomp(root_folder, '/');
2090                 real_path = imap_get_real_path
2091                         (session, IMAP_FOLDER(folder), root_folder, &r);
2092                 if (is_fatal(r))
2093                         return -1;
2094                 debug_print("IMAP root directory: %s\n", real_path);
2095
2096                 /* check if root directory exist */
2097
2098                 r = imap_threaded_list(session->folder, "", real_path,
2099                                        &lep_list);
2100
2101                 if (r != MAILIMAP_NO_ERROR)
2102                         imap_handle_error(SESSION(session), r);
2103
2104                 if ((r != MAILIMAP_NO_ERROR) || (clist_count(lep_list) == 0)) {
2105                         if (!folder->node) {
2106                                 item = folder_item_new(folder, folder->name, NULL);
2107                                 item->folder = folder;
2108                                 folder->node = item->node = g_node_new(item);
2109                         }
2110                         return -1;
2111                 }
2112                 mailimap_list_result_free(lep_list);
2113
2114                 g_free(real_path);
2115         }
2116
2117         if (folder->node)
2118                 item = FOLDER_ITEM(folder->node->data);
2119
2120         if (item && !item->path && root_folder) {
2121                 item->path = g_strdup(root_folder);
2122         }
2123
2124         if (!item || ((item->path || root_folder) &&
2125                       strcmp2(item->path, root_folder) != 0)) {
2126                 folder_tree_destroy(folder);
2127                 item = folder_item_new(folder, folder->name, root_folder);
2128                 item->folder = folder;
2129                 folder->node = item->node = g_node_new(item);
2130         }
2131
2132         imap_scan_tree_recursive(session, FOLDER_ITEM(folder->node->data), subs_only);
2133         imap_create_missing_folders(folder);
2134
2135         return 0;
2136 }
2137
2138 static gint imap_scan_tree(Folder *folder)
2139 {
2140         gboolean subs_only = FALSE;
2141         if (folder->account) {
2142                 debug_print(" scanning only subs %d\n", folder->account->imap_subsonly);
2143                 subs_only = folder->account->imap_subsonly;
2144         }
2145         return imap_scan_tree_real(folder, subs_only);
2146 }
2147
2148 static gint imap_scan_tree_recursive(IMAPSession *session, FolderItem *item, gboolean subs_only)
2149 {
2150         Folder *folder;
2151         IMAPFolder *imapfolder;
2152         FolderItem *new_item;
2153         GSList *item_list, *cur;
2154         GNode *node;
2155         gchar *real_path;
2156         gchar *wildcard_path;
2157         gchar separator;
2158         gchar wildcard[3];
2159         clist * lep_list;
2160         int r;
2161
2162         g_return_val_if_fail(item != NULL, -1);
2163         g_return_val_if_fail(item->folder != NULL, -1);
2164         g_return_val_if_fail(item->no_sub == FALSE, -1);
2165
2166         folder = item->folder;
2167         imapfolder = IMAP_FOLDER(folder);
2168
2169         separator = imap_get_path_separator(session, imapfolder, item->path, &r);
2170         if (is_fatal(r))
2171                 return r;
2172
2173         if (folder->ui_func)
2174                 folder->ui_func(folder, item, folder->ui_func_data);
2175
2176         if (item->path) {
2177                 wildcard[0] = separator;
2178                 wildcard[1] = '%';
2179                 wildcard[2] = '\0';
2180                 real_path = imap_get_real_path(session, imapfolder, item->path, &r);
2181                 if (is_fatal(r))
2182                         return r;
2183         } else {
2184                 wildcard[0] = '%';
2185                 wildcard[1] = '\0';
2186                 real_path = g_strdup("");
2187         }
2188
2189         Xstrcat_a(wildcard_path, real_path, wildcard,
2190                   {g_free(real_path); return MAILIMAP_ERROR_BAD_STATE;});
2191         lep_list = NULL;
2192
2193         if (subs_only)
2194                 r = imap_threaded_lsub(folder, "", wildcard_path, &lep_list);
2195         else
2196                 r = imap_threaded_list(folder, "", wildcard_path, &lep_list);
2197
2198         if (r != MAILIMAP_NO_ERROR) {
2199                 imap_handle_error(SESSION(session), r);
2200                 item_list = NULL;
2201                 return r;
2202         }
2203         else {
2204                 item_list = imap_list_from_lep(imapfolder,
2205                                                lep_list, real_path, FALSE);
2206                 mailimap_list_result_free(lep_list);
2207         }
2208
2209         g_free(real_path);
2210
2211         node = item->node->children;
2212         while (node != NULL) {
2213                 FolderItem *old_item = FOLDER_ITEM(node->data);
2214                 GNode *next = node->next;
2215
2216                 new_item = NULL;
2217                 for (cur = item_list; cur != NULL; cur = cur->next) {
2218                         FolderItem *cur_item = FOLDER_ITEM(cur->data);
2219                         if (!strcmp2(old_item->path, cur_item->path)) {
2220                                 new_item = cur_item;
2221                                 break;
2222                         }
2223                 }
2224                 if (!new_item) {
2225                         if (old_item && old_item->path && !strcmp(old_item->path, "INBOX")) {
2226                                 debug_print("not removing INBOX\n");
2227                         } else {
2228                                 debug_print("folder '%s' not found. removing...\n",
2229                                             old_item->path);
2230                                 folder_item_remove(old_item);
2231                         }
2232                 } else {
2233                         old_item->no_sub = new_item->no_sub;
2234                         old_item->no_select = new_item->no_select;
2235                         if (old_item->no_sub == TRUE && node->children) {
2236                                 debug_print("folder '%s' doesn't have "
2237                                             "subfolders. removing...\n",
2238                                             old_item->path);
2239                                 folder_item_remove_children(old_item);
2240                         }
2241                 }
2242
2243                 node = next;
2244         }
2245
2246         for (cur = item_list; cur != NULL; cur = cur->next) {
2247                 FolderItem *cur_item = FOLDER_ITEM(cur->data);
2248                 new_item = NULL;
2249
2250                 for (node = item->node->children; node != NULL;
2251                      node = node->next) {
2252                         if (!strcmp2(FOLDER_ITEM(node->data)->path,
2253                                      cur_item->path)) {
2254                                 new_item = FOLDER_ITEM(node->data);
2255                                 folder_item_destroy(cur_item);
2256                                 cur_item = NULL;
2257                                 break;
2258                         }
2259                 }
2260                 if (!new_item) {
2261                         new_item = cur_item;
2262                         debug_print("new folder '%s' found.\n", new_item->path);
2263                         folder_item_append(item, new_item);
2264                 }
2265
2266                 if (!strcmp(new_item->path, "INBOX")) {
2267                         new_item->stype = F_INBOX;
2268                         folder->inbox = new_item;
2269                 } else if (!folder_item_parent(item) || item->stype == F_INBOX) {
2270                         gchar *base;
2271
2272                         base = g_path_get_basename(new_item->path);
2273
2274                         if (!folder->outbox && !g_ascii_strcasecmp(base, "Sent")) {
2275                                 new_item->stype = F_OUTBOX;
2276                                 folder->outbox = new_item;
2277                         } else if (!folder->draft && !g_ascii_strcasecmp(base, "Drafts")) {
2278                                 new_item->stype = F_DRAFT;
2279                                 folder->draft = new_item;
2280                         } else if (!folder->queue && !g_ascii_strcasecmp(base, "Queue")) {
2281                                 new_item->stype = F_QUEUE;
2282                                 folder->queue = new_item;
2283                         } else if (!folder->trash && !g_ascii_strcasecmp(base, "Trash")) {
2284                                 new_item->stype = F_TRASH;
2285                                 folder->trash = new_item;
2286                         }
2287                         g_free(base);
2288                 }
2289
2290                 if (new_item->no_sub == FALSE)
2291                         imap_scan_tree_recursive(session, new_item, subs_only);
2292         }
2293
2294         g_slist_free(item_list);
2295
2296         return MAILIMAP_NO_ERROR;
2297 }
2298
2299 GList *imap_scan_subtree(Folder *folder, FolderItem *item, gboolean unsubs_only, gboolean recursive)
2300 {
2301         IMAPSession *session = imap_session_get(folder);
2302         gchar *real_path;
2303         gchar *wildcard_path;
2304         gchar separator;
2305         gchar wildcard[3];
2306         clist * lep_list;
2307         GSList *item_list = NULL, *cur;
2308         GList *child_list = NULL, *tmplist = NULL;
2309         GSList *sub_list = NULL;
2310         int r;
2311
2312         if (!session)
2313                 return NULL;
2314
2315         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &r);
2316         if (is_fatal(r))
2317                 return NULL;
2318
2319         if (item->path) {
2320                 wildcard[0] = separator;
2321                 wildcard[1] = '%';
2322                 wildcard[2] = '\0';
2323                 real_path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &r);
2324                 if (is_fatal(r))
2325                         return NULL;
2326         } else {
2327                 wildcard[0] = '%';
2328                 wildcard[1] = '\0';
2329                 real_path = g_strdup("");
2330         }
2331
2332         Xstrcat_a(wildcard_path, real_path, wildcard,
2333                   {g_free(real_path); return NULL;});
2334         lep_list = NULL;
2335
2336         if (unsubs_only)
2337                 statusbar_print_all(_("Looking for unsubscribed folders in %s..."),
2338                                 item->path?item->path:item->name);
2339         else
2340                 statusbar_print_all(_("Looking for subfolders of %s..."),
2341                                 item->path?item->path:item->name);
2342
2343         r = imap_threaded_list(folder, "", wildcard_path, &lep_list);
2344         if (r) {
2345                 statusbar_pop_all();
2346                 return NULL;
2347         }
2348         item_list = imap_list_from_lep(IMAP_FOLDER(folder),
2349                                lep_list, real_path, FALSE);
2350         mailimap_list_result_free(lep_list);
2351
2352         for (cur = item_list; cur != NULL; cur = cur->next) {
2353                 FolderItem *cur_item = FOLDER_ITEM(cur->data);
2354                 if (recursive) {
2355                         tmplist = imap_scan_subtree(folder, cur_item,
2356                                         unsubs_only, recursive);
2357                         if (tmplist)
2358                                 child_list = g_list_concat(child_list, tmplist);
2359                 }
2360                 child_list = g_list_prepend(child_list,
2361                                 imap_get_real_path(session,
2362                                         IMAP_FOLDER(folder), cur_item->path, &r));
2363                 if (is_fatal(r)) {
2364                         statusbar_pop_all();
2365                         return NULL;
2366                 }
2367                 folder_item_destroy(cur_item);
2368         }
2369         child_list = g_list_reverse(child_list);
2370         g_slist_free(item_list);
2371
2372         if (unsubs_only) {
2373                 r = imap_threaded_lsub(folder, "", wildcard_path, &lep_list);
2374                 if (r) {
2375                         statusbar_pop_all();
2376                         return NULL;
2377                 }
2378                 sub_list = imap_list_from_lep(IMAP_FOLDER(folder),
2379                                        lep_list, real_path, FALSE);
2380                 mailimap_list_result_free(lep_list);
2381
2382                 for (cur = sub_list; cur != NULL; cur = cur->next) {
2383                         FolderItem *cur_item = FOLDER_ITEM(cur->data);
2384                         GList *oldlitem = NULL;
2385                         gchar *tmp = imap_get_real_path(session,
2386                                         IMAP_FOLDER(folder), cur_item->path, &r);
2387                         if (r) {
2388                                 statusbar_pop_all();
2389                                 return NULL;
2390                         }
2391                         folder_item_destroy(cur_item);
2392                         oldlitem = g_list_find_custom(
2393                                         child_list, tmp, (GCompareFunc)strcmp2);
2394                         if (oldlitem) {
2395                                 child_list = g_list_remove_link(child_list, oldlitem);
2396                                 g_free(oldlitem->data);
2397                                 g_list_free(oldlitem);
2398                         }
2399                         g_free(tmp);
2400                 }
2401         }
2402
2403         statusbar_pop_all();
2404
2405         return child_list;
2406 }
2407
2408 static gint imap_create_tree(Folder *folder)
2409 {
2410         g_return_val_if_fail(folder != NULL, -1);
2411         g_return_val_if_fail(folder->node != NULL, -1);
2412         g_return_val_if_fail(folder->node->data != NULL, -1);
2413         g_return_val_if_fail(folder->account != NULL, -1);
2414
2415         imap_scan_tree(folder);
2416         imap_create_missing_folders(folder);
2417
2418         return 0;
2419 }
2420
2421 static void imap_create_missing_folders(Folder *folder)
2422 {
2423         g_return_if_fail(folder != NULL);
2424
2425         if (!folder->inbox)
2426                 folder->inbox = imap_create_special_folder
2427                         (folder, F_INBOX, "INBOX");
2428         if (!folder->trash)
2429                 folder->trash = imap_create_special_folder
2430                         (folder, F_TRASH, "Trash");
2431         if (!folder->queue)
2432                 folder->queue = imap_create_special_folder
2433                         (folder, F_QUEUE, "Queue");
2434         if (!folder->outbox)
2435                 folder->outbox = imap_create_special_folder
2436                         (folder, F_OUTBOX, "Sent");
2437         if (!folder->draft)
2438                 folder->draft = imap_create_special_folder
2439                         (folder, F_DRAFT, "Drafts");
2440 }
2441
2442 static FolderItem *imap_create_special_folder(Folder *folder,
2443                                               SpecialFolderItemType stype,
2444                                               const gchar *name)
2445 {
2446         FolderItem *item;
2447         FolderItem *new_item;
2448
2449         g_return_val_if_fail(folder != NULL, NULL);
2450         g_return_val_if_fail(folder->node != NULL, NULL);
2451         g_return_val_if_fail(folder->node->data != NULL, NULL);
2452         g_return_val_if_fail(folder->account != NULL, NULL);
2453         g_return_val_if_fail(name != NULL, NULL);
2454
2455         item = FOLDER_ITEM(folder->node->data);
2456         new_item = imap_create_folder(folder, item, name);
2457
2458         if (!new_item) {
2459                 g_warning("Can't create '%s'\n", name);
2460                 if (!folder->inbox) return NULL;
2461
2462                 new_item = imap_create_folder(folder, folder->inbox, name);
2463                 if (!new_item)
2464                         g_warning("Can't create '%s' under INBOX\n", name);
2465                 else
2466                         new_item->stype = stype;
2467         } else
2468                 new_item->stype = stype;
2469
2470         return new_item;
2471 }
2472
2473 static gchar *imap_folder_get_path(Folder *folder)
2474 {
2475         gchar *folder_path;
2476
2477         g_return_val_if_fail(folder != NULL, NULL);
2478         g_return_val_if_fail(folder->account != NULL, NULL);
2479
2480         folder_path = g_strconcat(get_imap_cache_dir(),
2481                                   G_DIR_SEPARATOR_S,
2482                                   folder->account->recv_server,
2483                                   G_DIR_SEPARATOR_S,
2484                                   folder->account->userid,
2485                                   NULL);
2486
2487         return folder_path;
2488 }
2489
2490 #ifdef G_OS_WIN32
2491 static gchar *imap_encode_unsafe_chars(const gchar *str)
2492 {
2493         gchar *ret = NULL, *o_ret;
2494         gchar *i;
2495         if (!str)
2496                 return NULL;
2497         ret = g_malloc(3*strlen(str)+1);
2498         o_ret = ret;
2499         for (i = str; *i; i++) {
2500                 switch(*i) {
2501                         case ':':
2502                         case '|':
2503                         case '<':
2504                         case '>':
2505                         case '*':
2506                         case '?':
2507                         case '#':
2508                                 *ret++ = '%';
2509                                 *ret++ = '0'+(*i/10);
2510                                 *ret++ = '0'+(*i%10);
2511                                 break;
2512                         default:
2513                                 *ret++ = *i;
2514                 }
2515         }
2516         *ret++ = '\0';
2517         return o_ret;
2518 }
2519 #endif
2520 static gchar *imap_item_get_path(Folder *folder, FolderItem *item)
2521 {
2522         gchar *folder_path, *path;
2523         gchar *item_path = NULL;
2524
2525         g_return_val_if_fail(folder != NULL, NULL);
2526         g_return_val_if_fail(item != NULL, NULL);
2527         folder_path = imap_folder_get_path(folder);
2528
2529         g_return_val_if_fail(folder_path != NULL, NULL);
2530
2531 #ifdef G_OS_UNIX
2532         item_path = g_strdup(item->path);
2533 #else
2534         item_path = imap_encode_unsafe_chars(item->path);
2535 #endif
2536
2537         if (g_path_is_absolute(folder_path)) {
2538                 if (item_path)
2539                         path = g_strconcat(folder_path, G_DIR_SEPARATOR_S,
2540                                            item_path, NULL);
2541                 else
2542                         path = g_strdup(folder_path);
2543         } else {
2544                 if (item_path)
2545                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
2546                                            folder_path, G_DIR_SEPARATOR_S,
2547                                            item_path, NULL);
2548                 else
2549                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
2550                                            folder_path, NULL);
2551         }
2552         g_free(folder_path);
2553         g_free(item_path);
2554 #ifdef G_OS_WIN32
2555         while (strchr(path, '/'))
2556                 *strchr(path, '/') = '\\';
2557 #endif
2558
2559         return path;
2560 }
2561
2562 static FolderItem *imap_create_folder(Folder *folder, FolderItem *parent,
2563                                const gchar *name)
2564 {
2565         gchar *dirpath, *imap_path;
2566         IMAPSession *session;
2567         FolderItem *new_item;
2568         gchar separator;
2569         gchar *new_name;
2570         const gchar *p;
2571         gint ok;
2572         gboolean no_select = FALSE, no_sub = FALSE;
2573         gboolean exist = FALSE;
2574
2575         g_return_val_if_fail(folder != NULL, NULL);
2576         g_return_val_if_fail(folder->account != NULL, NULL);
2577         g_return_val_if_fail(parent != NULL, NULL);
2578         g_return_val_if_fail(name != NULL, NULL);
2579
2580         debug_print("getting session...\n");
2581         session = imap_session_get(folder);
2582         if (!session) {
2583                 return NULL;
2584         }
2585
2586         if (!folder_item_parent(parent) && strcmp(name, "INBOX") == 0) {
2587                 dirpath = g_strdup(name);
2588         }else if (parent->path)
2589                 dirpath = g_strconcat(parent->path, "/", name, NULL);
2590         else if ((p = strchr(name, '/')) != NULL && *(p + 1) != '\0')
2591                 dirpath = g_strdup(name);
2592         else if (folder->account->imap_dir && *folder->account->imap_dir) {
2593                 gchar *imap_dir;
2594
2595                 Xstrdup_a(imap_dir, folder->account->imap_dir, {return NULL;});
2596                 strtailchomp(imap_dir, '/');
2597                 dirpath = g_strconcat(imap_dir, "/", name, NULL);
2598         } else
2599                 dirpath = g_strdup(name);
2600
2601
2602
2603         /* keep trailing directory separator to create a folder that contains
2604            sub folder */
2605         imap_path = imap_utf8_to_modified_utf7(dirpath, FALSE);
2606
2607         strtailchomp(dirpath, '/');
2608         Xstrdup_a(new_name, name, {
2609                 g_free(dirpath);
2610                 return NULL;});
2611
2612         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), imap_path, &ok);
2613         if (is_fatal(ok))
2614                 return NULL;
2615         imap_path_separator_subst(imap_path, separator);
2616         /* remove trailing / for display */
2617         strtailchomp(new_name, '/');
2618
2619         if (strcmp(dirpath, "INBOX") != 0) {
2620                 GPtrArray *argbuf;
2621                 int r;
2622                 clist * lep_list;
2623
2624                 argbuf = g_ptr_array_new();
2625                 r = imap_threaded_list(folder, "", imap_path, &lep_list);
2626                 if (r != MAILIMAP_NO_ERROR) {
2627                         imap_handle_error(SESSION(session), r);
2628                         log_warning(LOG_PROTOCOL, _("can't create mailbox: LIST failed\n"));
2629                         g_free(imap_path);
2630                         g_free(dirpath);
2631                         ptr_array_free_strings(argbuf);
2632                         g_ptr_array_free(argbuf, TRUE);
2633                         return NULL;
2634                 }
2635
2636                 if (clist_count(lep_list) > 0)
2637                         exist = TRUE;
2638                 mailimap_list_result_free(lep_list);
2639                 lep_list = NULL;
2640                 if (!exist) {
2641                         ok = imap_cmd_create(session, imap_path);
2642                         if (ok != MAILIMAP_NO_ERROR) {
2643                                 log_warning(LOG_PROTOCOL, _("can't create mailbox\n"));
2644                                 g_free(imap_path);
2645                                 g_free(dirpath);
2646                                 return NULL;
2647                         }
2648                         r = imap_threaded_list(folder, "", imap_path, &lep_list);
2649                         if (r == MAILIMAP_NO_ERROR) {
2650                                 GSList *item_list = imap_list_from_lep(IMAP_FOLDER(folder),
2651                                                lep_list, dirpath, TRUE);
2652                                 if (item_list) {
2653                                         FolderItem *cur_item = FOLDER_ITEM(item_list->data);
2654                                         no_select = cur_item->no_select;
2655                                         no_sub = cur_item->no_sub;
2656                                         g_slist_free(item_list);
2657                                 }
2658                                 mailimap_list_result_free(lep_list);
2659                         } else {
2660                                 imap_handle_error(SESSION(session), r);
2661                         }
2662                 }
2663                 imap_threaded_subscribe(folder, imap_path, TRUE);
2664         } else {
2665                 clist *lep_list;
2666                 int r;
2667                 /* just get flags */
2668                 r = imap_threaded_list(folder, "", "INBOX", &lep_list);
2669                 if (r == MAILIMAP_NO_ERROR) {
2670                         GSList *item_list = imap_list_from_lep(IMAP_FOLDER(folder),
2671                                        lep_list, dirpath, TRUE);
2672                         if (item_list) {
2673                                 FolderItem *cur_item = FOLDER_ITEM(item_list->data);
2674                                 no_select = cur_item->no_select;
2675                                 no_sub = cur_item->no_sub;
2676                                 g_slist_free(item_list);
2677                         }
2678                         mailimap_list_result_free(lep_list);
2679                 } else {
2680                         imap_handle_error(SESSION(session), r);
2681                 }
2682         }
2683
2684         new_item = folder_item_new(folder, new_name, dirpath);
2685         new_item->no_select = no_select;
2686         new_item->no_sub = no_sub;
2687         folder_item_append(parent, new_item);
2688         g_free(imap_path);
2689         g_free(dirpath);
2690
2691         dirpath = folder_item_get_path(new_item);
2692         if (!is_dir_exist(dirpath))
2693                 make_dir_hier(dirpath);
2694         g_free(dirpath);
2695
2696         if (exist) {
2697                 /* folder existed, scan it */
2698                 imap_scan_required(folder, new_item);
2699                 folder_item_scan_full(new_item, FALSE);
2700         }
2701
2702         return new_item;
2703 }
2704
2705 static gint imap_rename_folder(Folder *folder, FolderItem *item,
2706                                const gchar *name)
2707 {
2708         gchar *dirpath;
2709         gchar *newpath;
2710         gchar *real_oldpath;
2711         gchar *real_newpath;
2712         gchar *paths[2];
2713         gchar *old_cache_dir;
2714         gchar *new_cache_dir;
2715         IMAPSession *session;
2716         gchar separator;
2717         gint ok;
2718         gint exists, recent, unseen;
2719         guint32 uid_validity;
2720
2721         g_return_val_if_fail(folder != NULL, -1);
2722         g_return_val_if_fail(item != NULL, -1);
2723         g_return_val_if_fail(item->path != NULL, -1);
2724         g_return_val_if_fail(name != NULL, -1);
2725
2726         debug_print("getting session...\n");
2727         session = imap_session_get(folder);
2728         if (!session) {
2729                 return -1;
2730         }
2731
2732         if (strchr(name, imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &ok)) != NULL ||
2733                 is_fatal(ok)) {
2734                 g_warning(_("New folder name must not contain the namespace "
2735                             "path separator"));
2736                 return -1;
2737         }
2738
2739         real_oldpath = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &ok);
2740         if (is_fatal(ok)) {
2741                 return -1;
2742         }
2743
2744         g_free(session->mbox);
2745         session->mbox = NULL;
2746         session->exists = 0;
2747         session->recent = 0;
2748         session->expunge = 0;
2749         ok = imap_cmd_examine(session, "INBOX",
2750                               &exists, &recent, &unseen, &uid_validity, FALSE);
2751         if (ok != MAILIMAP_NO_ERROR) {
2752                 g_free(real_oldpath);
2753                 return -1;
2754         }
2755
2756         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &ok);
2757         if (is_fatal(ok))
2758                 return -1;
2759         if (strchr(item->path, G_DIR_SEPARATOR)) {
2760                 dirpath = g_path_get_dirname(item->path);
2761                 newpath = g_strconcat(dirpath, G_DIR_SEPARATOR_S, name, NULL);
2762                 g_free(dirpath);
2763         } else
2764                 newpath = g_strdup(name);
2765
2766         real_newpath = imap_utf8_to_modified_utf7(newpath, FALSE);
2767         imap_path_separator_subst(real_newpath, separator);
2768
2769         ok = imap_cmd_rename(session, real_oldpath, real_newpath);
2770         if (ok != MAILIMAP_NO_ERROR) {
2771                 log_warning(LOG_PROTOCOL, _("can't rename mailbox: %s to %s\n"),
2772                             real_oldpath, real_newpath);
2773                 g_free(real_oldpath);
2774                 g_free(newpath);
2775                 g_free(real_newpath);
2776                 return -1;
2777         }
2778         g_free(item->name);
2779         item->name = g_strdup(name);
2780
2781         old_cache_dir = folder_item_get_path(item);
2782
2783         paths[0] = g_strdup(item->path);
2784         paths[1] = newpath;
2785         g_node_traverse(item->node, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
2786                         imap_rename_folder_func, paths);
2787
2788         if (is_dir_exist(old_cache_dir)) {
2789                 new_cache_dir = folder_item_get_path(item);
2790                 if (rename(old_cache_dir, new_cache_dir) < 0) {
2791                         FILE_OP_ERROR(old_cache_dir, "rename");
2792                 }
2793                 g_free(new_cache_dir);
2794         }
2795
2796         g_free(old_cache_dir);
2797         g_free(paths[0]);
2798         g_free(newpath);
2799         g_free(real_oldpath);
2800         g_free(real_newpath);
2801         return 0;
2802 }
2803
2804 gint imap_subscribe(Folder *folder, FolderItem *item, gchar *rpath, gboolean sub)
2805 {
2806         gchar *path;
2807         gint r = -1;
2808         IMAPSession *session;
2809         debug_print("getting session...\n");
2810
2811         session = imap_session_get(folder);
2812         if (!session) {
2813                 return -1;
2814         }
2815         if (item && item->path) {
2816                 path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &r);
2817                 if (!path || is_fatal(r))
2818                         return -1;
2819                 if (!strcmp(path, "INBOX") && sub == FALSE)
2820                         return -1;
2821                 debug_print("%ssubscribing %s\n", sub?"":"un", path);
2822                 r = imap_threaded_subscribe(folder, path, sub);
2823                 g_free(path);
2824         } else if (rpath) {
2825                 r = imap_threaded_subscribe(folder, rpath, sub);
2826         } else
2827                 return -1;
2828         return r;
2829 }
2830
2831 static gint imap_remove_folder_real(Folder *folder, FolderItem *item)
2832 {
2833         gint ok;
2834         IMAPSession *session;
2835         gchar *path;
2836         gchar *cache_dir;
2837         gboolean selected_folder;
2838
2839         g_return_val_if_fail(folder != NULL, -1);
2840         g_return_val_if_fail(item != NULL, -1);
2841         g_return_val_if_fail(item->path != NULL, -1);
2842
2843         debug_print("getting session...\n");
2844         session = imap_session_get(folder);
2845         if (!session) {
2846                 return -1;
2847         }
2848         path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &ok);
2849         if (is_fatal(ok))
2850                 return -1;
2851
2852         imap_threaded_subscribe(folder, path, FALSE);
2853
2854         selected_folder = (session->mbox != NULL) &&
2855                           (!strcmp(session->mbox, item->path));
2856         if (selected_folder) {
2857                 ok = imap_cmd_close(session);
2858                 if (ok != MAILIMAP_NO_ERROR) {
2859                         debug_print("close err %d\n", ok);
2860                         return ok;
2861                 }
2862         }
2863         ok = imap_cmd_delete(session, path);
2864         if (ok != MAILIMAP_NO_ERROR && !is_fatal(ok)) {
2865                 gchar *tmp = g_strdup_printf("%s%c", path,
2866                                 imap_get_path_separator(session, IMAP_FOLDER(folder), path, &ok));
2867                 g_free(path);
2868                 path = tmp;
2869                 if (!is_fatal(ok))
2870                         ok = imap_cmd_delete(session, path);
2871         }
2872
2873         if (ok != MAILIMAP_NO_ERROR) {
2874                 log_warning(LOG_PROTOCOL, _("can't delete mailbox\n"));
2875                 g_free(path);
2876                 return -1;
2877         }
2878
2879         g_free(path);
2880         cache_dir = folder_item_get_path(item);
2881         if (is_dir_exist(cache_dir) && remove_dir_recursive(cache_dir) < 0)
2882                 g_warning("can't remove directory '%s'\n", cache_dir);
2883         g_free(cache_dir);
2884         folder_item_remove(item);
2885         return 0;
2886 }
2887
2888 static gint imap_remove_folder(Folder *folder, FolderItem *item)
2889 {
2890         GNode *node, *next;
2891
2892         g_return_val_if_fail(item != NULL, -1);
2893         g_return_val_if_fail(item->folder != NULL, -1);
2894         g_return_val_if_fail(item->node != NULL, -1);
2895
2896         node = item->node->children;
2897         while (node != NULL) {
2898                 next = node->next;
2899                 if (imap_remove_folder(folder, FOLDER_ITEM(node->data)) < 0)
2900                         return -1;
2901                 node = next;
2902         }
2903         debug_print("IMAP removing %s\n", item->path);
2904
2905         if (imap_remove_all_msg(folder, item) < 0)
2906                 return -1;
2907         return imap_remove_folder_real(folder, item);
2908 }
2909
2910 typedef struct _uncached_data {
2911         IMAPSession *session;
2912         FolderItem *item;
2913         MsgNumberList *numlist;
2914         guint cur;
2915         guint total;
2916         gboolean done;
2917         int ok;
2918 } uncached_data;
2919
2920 static void *imap_get_uncached_messages_thread(void *data)
2921 {
2922         uncached_data *stuff = (uncached_data *)data;
2923         IMAPSession *session = stuff->session;
2924         FolderItem *item = stuff->item;
2925         MsgNumberList *numlist = stuff->numlist;
2926         GSList *newlist = NULL;
2927         GSList *llast = NULL;
2928         GSList *seq_list, *cur;
2929         gboolean got_alien_tags = FALSE;
2930
2931         debug_print("uncached_messages\n");
2932
2933         if (session == NULL || item == NULL || item->folder == NULL
2934             || FOLDER_CLASS(item->folder) != &imap_class) {
2935                 stuff->done = TRUE;
2936                 return NULL;
2937         }
2938
2939         seq_list = imap_get_lep_set_from_numlist(IMAP_FOLDER(item->folder), numlist);
2940         debug_print("get msgs info\n");
2941         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
2942                 struct mailimap_set * imapset;
2943                 unsigned int i;
2944                 int r;
2945                 carray * env_list;
2946                 int count;
2947
2948                 if (session->cancelled)
2949                         break;
2950
2951                 imapset = cur->data;
2952
2953                 r = imap_threaded_fetch_env(session->folder,
2954                                             imapset, &env_list);
2955                 if (r != MAILIMAP_NO_ERROR) {
2956                         imap_handle_error(SESSION(session), r);
2957                         if (is_fatal(r)) {
2958                                 stuff->ok = r;
2959                                 return NULL;
2960                         }
2961                         continue;
2962                 }
2963
2964                 session_set_access_time(SESSION(session));
2965
2966                 count = 0;
2967                 for(i = 0 ; i < carray_count(env_list) ; i += 2) {
2968                         struct imap_fetch_env_info * info;
2969                         MsgInfo * msginfo;
2970                         GSList *tags = NULL, *cur = NULL;
2971                         info = carray_get(env_list, i);
2972                         tags = carray_get(env_list, i+1);
2973                         msginfo = imap_envelope_from_lep(info, item);
2974                         if (msginfo == NULL) {
2975                                 slist_free_strings(tags);
2976                                 g_slist_free(tags);
2977                                 continue;
2978                         }
2979                         if (tags != NULL) {
2980                                 g_slist_free(msginfo->tags);
2981                                 msginfo->tags = NULL;
2982                         }
2983                         for (cur = tags; cur; cur = cur->next) {
2984                                 gchar *real_tag = imap_modified_utf7_to_utf8(cur->data, TRUE);
2985                                 gint id = 0;
2986                                 id = tags_get_id_for_str(real_tag);
2987                                 if (id == -1) {
2988                                         id = tags_add_tag(real_tag);
2989                                         got_alien_tags = TRUE;
2990                                 }
2991                                 if (!g_slist_find(msginfo->tags, GINT_TO_POINTER(id))) {
2992                                         msginfo->tags = g_slist_append(
2993                                                         msginfo->tags,
2994                                                         GINT_TO_POINTER(id));
2995                                 }
2996                                 g_free(real_tag);
2997                         }
2998                         slist_free_strings(tags);
2999                         g_slist_free(tags);
3000                         msginfo->folder = item;
3001                         if (!newlist)
3002                                 llast = newlist = g_slist_append(newlist, msginfo);
3003                         else {
3004                                 llast = g_slist_append(llast, msginfo);
3005                                 llast = llast->next;
3006                         }
3007                         count ++;
3008                 }
3009
3010                 imap_fetch_env_free(env_list);
3011         }
3012
3013         if (got_alien_tags) {
3014                 tags_write_tags();
3015                 main_window_reflect_tags_changes(mainwindow_get_mainwindow());
3016         }
3017
3018         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
3019                 struct mailimap_set * imapset;
3020
3021                 imapset = cur->data;
3022                 mailimap_set_free(imapset);
3023         }
3024
3025         session_set_access_time(SESSION(session));
3026         stuff->done = TRUE;
3027         return newlist;
3028 }
3029
3030 #define MAX_MSG_NUM 50
3031
3032 static GSList *imap_get_uncached_messages(IMAPSession *session,
3033                                         FolderItem *item,
3034                                         MsgNumberList *numlist,
3035                                         int *r)
3036 {
3037         GSList *result = NULL;
3038         GSList * cur;
3039         uncached_data *data = g_new0(uncached_data, 1);
3040         int finished;
3041
3042         finished = 0;
3043         cur = numlist;
3044         data->total = g_slist_length(numlist);
3045         data->ok = MAILIMAP_NO_ERROR;
3046         debug_print("messages list : %i\n", data->total);
3047
3048         while (cur != NULL) {
3049                 GSList * partial_result;
3050                 int count;
3051                 GSList * newlist;
3052                 GSList * llast;
3053
3054                 llast = NULL;
3055                 count = 0;
3056                 newlist = NULL;
3057                 while (count < MAX_MSG_NUM) {
3058                         void * p;
3059
3060                         p = cur->data;
3061
3062                         if (newlist == NULL)
3063                                 llast = newlist = g_slist_append(newlist, p);
3064                         else {
3065                                 llast = g_slist_append(llast, p);
3066                                 llast = llast->next;
3067                         }
3068                         count ++;
3069
3070                         cur = cur->next;
3071                         if (cur == NULL)
3072                                 break;
3073                 }
3074
3075                 data->done = FALSE;
3076                 data->session = session;
3077                 data->item = item;
3078                 data->numlist = newlist;
3079                 data->cur += count;
3080
3081                 if (prefs_common.work_offline &&
3082                     !inc_offline_should_override(FALSE,
3083                         _("Claws Mail needs network access in order "
3084                           "to access the IMAP server."))) {
3085                         g_free(data);
3086                         return NULL;
3087                 }
3088
3089                 partial_result =
3090                         (GSList *)imap_get_uncached_messages_thread(data);
3091                 *r = data->ok;
3092                 if (data->ok != MAILIMAP_NO_ERROR) {
3093                         goto bail;
3094                 }
3095                 statusbar_progress_all(data->cur,data->total, 1);
3096
3097                 g_slist_free(newlist);
3098
3099                 result = g_slist_concat(result, partial_result);
3100         }
3101 bail:
3102         g_free(data);
3103
3104         statusbar_progress_all(0,0,0);
3105         statusbar_pop_all();
3106
3107         return result;
3108 }
3109
3110 static void imap_delete_all_cached_messages(FolderItem *item)
3111 {
3112         gchar *dir;
3113
3114         g_return_if_fail(item != NULL);
3115         g_return_if_fail(item->folder != NULL);
3116         g_return_if_fail(FOLDER_CLASS(item->folder) == &imap_class);
3117
3118         debug_print("Deleting all cached messages...\n");
3119
3120         dir = folder_item_get_path(item);
3121         if (is_dir_exist(dir))
3122                 remove_all_numbered_files(dir);
3123         g_free(dir);
3124
3125         debug_print("done.\n");
3126 }
3127
3128 gchar imap_get_path_separator_for_item(FolderItem *item)
3129 {
3130         Folder *folder = NULL;
3131         IMAPFolder *imap_folder = NULL;
3132         IMAPSession *session = NULL;
3133         gchar result = '/';
3134         gint ok;
3135         if (!item)
3136                 return '/';
3137         folder = item->folder;
3138
3139         if (!folder)
3140                 return '/';
3141
3142         imap_folder = IMAP_FOLDER(folder);
3143
3144         if (!imap_folder)
3145                 return '/';
3146
3147         debug_print("getting session...");
3148         session = imap_session_get(FOLDER(folder));
3149         result = imap_get_path_separator(session, imap_folder, item->path, &ok);
3150         return result;
3151 }
3152
3153 static gchar imap_refresh_path_separator(IMAPSession *session, IMAPFolder *folder, const gchar *subfolder, gint *ok)
3154 {
3155         clist * lep_list;
3156         int r;
3157         gchar separator = '\0';
3158
3159         g_return_val_if_fail(session != NULL, '/');
3160         r = imap_threaded_list((Folder *)folder, "", subfolder, &lep_list);
3161
3162         if (r != MAILIMAP_NO_ERROR) {
3163                 imap_handle_error(SESSION(session), r);
3164                 log_warning(LOG_PROTOCOL, _("LIST failed\n"));
3165                 *ok = r;
3166                 return '\0';
3167         }
3168
3169         if (clist_count(lep_list) > 0) {
3170                 clistiter * iter = clist_begin(lep_list);
3171                 struct mailimap_mailbox_list * mb;
3172                 mb = clist_content(iter);
3173
3174                 separator = mb->mb_delimiter;
3175                 debug_print("got separator: %c\n", folder->last_seen_separator);
3176         }
3177         *ok = MAILIMAP_NO_ERROR;
3178         mailimap_list_result_free(lep_list);
3179         return separator;
3180 }
3181
3182 static gchar imap_get_path_separator(IMAPSession *session, IMAPFolder *folder, const gchar *path, gint *ok)
3183 {
3184         gchar separator = '/';
3185
3186         if (folder->last_seen_separator == 0) {
3187                 folder->last_seen_separator = imap_refresh_path_separator(session, folder, "", ok);
3188         }
3189
3190         if (folder->last_seen_separator == 0) {
3191                 folder->last_seen_separator = imap_refresh_path_separator(session, folder, "INBOX", ok);
3192         }
3193
3194         if (folder->last_seen_separator != 0) {
3195                 debug_print("using separator: %c\n", folder->last_seen_separator);
3196                 return folder->last_seen_separator;
3197         }
3198
3199         return separator;
3200 }
3201
3202 static gchar *imap_get_real_path(IMAPSession *session, IMAPFolder *folder, const gchar *path, gint *ok)
3203 {
3204         gchar *real_path;
3205         gchar separator;
3206
3207         g_return_val_if_fail(folder != NULL, NULL);
3208         g_return_val_if_fail(path != NULL, NULL);
3209
3210         real_path = imap_utf8_to_modified_utf7(path, FALSE);
3211         separator = imap_get_path_separator(session, folder, path, ok);
3212         imap_path_separator_subst(real_path, separator);
3213
3214         return real_path;
3215 }
3216
3217 static gint imap_set_message_flags(IMAPSession *session,
3218                                    IMAPFolderItem *item,
3219                                    MsgNumberList *numlist,
3220                                    IMAPFlags flags,
3221                                    GSList *tags,
3222                                    gboolean is_set)
3223 {
3224         gint ok = 0;
3225         GSList *seq_list;
3226         GSList * cur;
3227         gint total = 0;
3228         IMAPFolder *folder = NULL;
3229         GSList *sorted_list = NULL;
3230
3231         if (numlist == NULL || session == NULL)
3232                 return MAILIMAP_ERROR_BAD_STATE;
3233
3234         folder = IMAP_FOLDER(session->folder);
3235
3236         sorted_list = g_slist_copy(numlist);
3237         sorted_list = g_slist_sort(sorted_list, g_int_compare);
3238
3239         cur = g_slist_last(sorted_list);
3240
3241         if (cur)
3242                 total = GPOINTER_TO_INT(cur->data);
3243
3244         seq_list = imap_get_lep_set_from_numlist(IMAP_FOLDER(session->folder), sorted_list);
3245
3246         statusbar_print_all(_("Flagging messages..."));
3247
3248         for(cur = seq_list ; cur != NULL ; cur = g_slist_next(cur)) {
3249                 struct mailimap_set * imapset = (struct mailimap_set *)cur->data;
3250                 struct mailimap_set_item *set_item = clist_content(
3251                                                         clist_begin(imapset->set_list));
3252
3253                 statusbar_progress_all(set_item->set_first, total, 1);
3254
3255                 ok = imap_cmd_store(session, item, imapset,
3256                                     flags, tags, is_set);
3257                 statusbar_progress_all(set_item->set_last, total, 1);
3258                 if (ok != MAILIMAP_NO_ERROR && folder->max_set_size > 20) {
3259                         /* reduce max set size */
3260                         folder->max_set_size /= 2;
3261                 }
3262                 if (ok != MAILIMAP_NO_ERROR && is_fatal(ok)) {
3263                         break;
3264                 }
3265         }
3266
3267         g_slist_free(sorted_list);
3268
3269         statusbar_progress_all(0,0,0);
3270         statusbar_pop_all();
3271
3272         imap_lep_set_free(seq_list);
3273
3274         return ok;
3275 }
3276
3277 typedef struct _select_data {
3278         IMAPSession *session;
3279         gchar *real_path;
3280         gint *exists;
3281         gint *recent;
3282         gint *unseen;
3283         guint32 *uid_validity;
3284         gboolean done;
3285 } select_data;
3286
3287 static gint imap_select(IMAPSession *session, IMAPFolder *folder,
3288                         FolderItem *item,
3289                         gint *exists, gint *recent, gint *unseen,
3290                         guint32 *uid_validity, gint *can_create_flags,
3291                         gboolean block)
3292 {
3293         gchar *real_path;
3294         gint ok;
3295         gint exists_, recent_, unseen_;
3296         guint32 uid_validity_;
3297         gint can_create_flags_;
3298         const gchar *path = item ? item->path:NULL;
3299
3300         if (!item) {
3301                 return MAILIMAP_ERROR_BAD_STATE;
3302         }
3303
3304         if (!exists && !recent && !unseen && !uid_validity && !can_create_flags) {
3305                 if (session->mbox && strcmp(session->mbox, path) == 0)
3306                         return MAILIMAP_NO_ERROR;
3307         }
3308         if (!exists && !recent && !unseen && !uid_validity && can_create_flags) {
3309                 if (session->mbox && strcmp(session->mbox, path) == 0) {
3310                         if (IMAP_FOLDER_ITEM(item)->can_create_flags != ITEM_CAN_CREATE_FLAGS_UNKNOWN)
3311                                 return MAILIMAP_NO_ERROR;
3312                 }
3313         }
3314         if (!exists)
3315                 exists = &exists_;
3316         if (!recent)
3317                 recent = &recent_;
3318         if (!unseen)
3319                 unseen = &unseen_;
3320         if (!uid_validity)
3321                 uid_validity = &uid_validity_;
3322         if (!can_create_flags)
3323                 can_create_flags = &can_create_flags_;
3324
3325         g_free(session->mbox);
3326         session->mbox = NULL;
3327         session->exists = 0;
3328         session->recent = 0;
3329         session->expunge = 0;
3330
3331         real_path = imap_get_real_path(session, folder, path, &ok);
3332         if (is_fatal(ok))
3333                 return ok;
3334         g_slist_free(IMAP_FOLDER_ITEM(item)->ok_flags);
3335         IMAP_FOLDER_ITEM(item)->ok_flags = NULL;
3336         ok = imap_cmd_select(session, real_path,
3337                              exists, recent, unseen, uid_validity, can_create_flags,
3338                              &(IMAP_FOLDER_ITEM(item)->ok_flags), block);
3339         if (ok != MAILIMAP_NO_ERROR) {
3340                 log_warning(LOG_PROTOCOL, _("can't select folder: %s\n"), real_path);
3341         } else {
3342                 session->mbox = g_strdup(path);
3343                 session->folder_content_changed = FALSE;
3344                 session->exists = *exists;
3345                 session->recent = *recent;
3346                 session->expunge = 0;
3347                 session->unseen = *unseen;
3348                 session->uid_validity = *uid_validity;
3349                 debug_print("select: exists %d recent %d expunge %d uid_validity %d can_create_flags %d\n",
3350                         session->exists, session->recent, session->expunge,
3351                         session->uid_validity, *can_create_flags);
3352         }
3353         if (*can_create_flags) {
3354                 IMAP_FOLDER_ITEM(item)->can_create_flags = ITEM_CAN_CREATE_FLAGS;
3355         } else {
3356                 IMAP_FOLDER_ITEM(item)->can_create_flags = ITEM_CANNOT_CREATE_FLAGS;
3357         }
3358         g_free(real_path);
3359
3360         return ok;
3361 }
3362
3363 static gint imap_status(IMAPSession *session, IMAPFolder *folder,
3364                         const gchar *path, IMAPFolderItem *item,
3365                         gint *messages,
3366                         guint32 *uid_next, guint32 *uid_validity,
3367                         gint *unseen, gboolean block)
3368 {
3369         int r;
3370         clistiter * iter;
3371         struct mailimap_mailbox_data_status * data_status;
3372         int got_values;
3373         gchar *real_path;
3374         guint mask = 0;
3375
3376         real_path = imap_get_real_path(session, folder, path, &r);
3377         if (is_fatal(r))
3378                 return r;
3379
3380         if (messages) {
3381                 mask |= 1 << 0;
3382                 *messages = 0;
3383         }
3384         if (uid_next) {
3385                 mask |= 1 << 2;
3386                 *uid_next = 0;
3387         }
3388         if (uid_validity) {
3389                 mask |= 1 << 3;
3390                 *uid_validity = 0;
3391         }
3392         if (unseen) {
3393                 mask |= 1 << 4;
3394                 *unseen = 0;
3395         }
3396
3397         if (session->mbox != NULL &&
3398             !strcmp(session->mbox, item->item.path)) {
3399                 r = imap_cmd_close(session);
3400                 if (r != MAILIMAP_NO_ERROR) {
3401                         debug_print("close err %d\n", r);
3402                         return r;
3403                 }
3404         }
3405
3406         r = imap_threaded_status(FOLDER(folder), real_path,
3407                 &data_status, mask);
3408
3409         g_free(real_path);
3410         if (r != MAILIMAP_NO_ERROR) {
3411                 imap_handle_error(SESSION(session), r);
3412                 debug_print("status err %d\n", r);
3413                 return r;
3414         }
3415
3416         if (data_status->st_info_list == NULL) {
3417                 mailimap_mailbox_data_status_free(data_status);
3418                 debug_print("status->st_info_list == NULL\n");
3419                 return MAILIMAP_ERROR_BAD_STATE;
3420         }
3421
3422         got_values = 0;
3423         for(iter = clist_begin(data_status->st_info_list) ; iter != NULL ;
3424             iter = clist_next(iter)) {
3425                 struct mailimap_status_info * info;
3426
3427                 info = clist_content(iter);
3428                 switch (info->st_att) {
3429                 case MAILIMAP_STATUS_ATT_MESSAGES:
3430                         if (messages) {
3431                                 * messages = info->st_value;
3432                                 got_values |= 1 << 0;
3433                         }
3434                         break;
3435
3436                 case MAILIMAP_STATUS_ATT_UIDNEXT:
3437                         if (uid_next) {
3438                                 * uid_next = info->st_value;
3439                                 got_values |= 1 << 2;
3440                         }
3441                         break;
3442
3443                 case MAILIMAP_STATUS_ATT_UIDVALIDITY:
3444                         if (uid_validity) {
3445                                 * uid_validity = info->st_value;
3446                                 got_values |= 1 << 3;
3447                         }
3448                         break;
3449
3450                 case MAILIMAP_STATUS_ATT_UNSEEN:
3451                         if (unseen) {
3452                                 * unseen = info->st_value;
3453                                 got_values |= 1 << 4;
3454                         }
3455                         break;
3456                 }
3457         }
3458         mailimap_mailbox_data_status_free(data_status);
3459
3460         if (got_values != mask) {
3461                 g_warning("status: incomplete values received (%d)\n", got_values);
3462         }
3463         return MAILIMAP_NO_ERROR;
3464 }
3465
3466 static void imap_free_capabilities(IMAPSession *session)
3467 {
3468         slist_free_strings(session->capability);
3469         g_slist_free(session->capability);
3470         session->capability = NULL;
3471 }
3472
3473 /* low-level IMAP4rev1 commands */
3474
3475 static gint imap_cmd_login(IMAPSession *session,
3476                            const gchar *user, const gchar *pass,
3477                            const gchar *type)
3478 {
3479         int r;
3480         gint ok;
3481
3482         if (!strcmp(type, "LOGIN") && imap_has_capability(session, "LOGINDISABLED")) {
3483                 gint ok = MAILIMAP_ERROR_BAD_STATE;
3484                 if (imap_has_capability(session, "STARTTLS")) {
3485 #if (defined(USE_OPENSSL) || defined (USE_GNUTLS))
3486                         log_warning(LOG_PROTOCOL, _("Server requires TLS to log in.\n"));
3487                         ok = imap_cmd_starttls(session);
3488                         if (ok != MAILIMAP_NO_ERROR) {
3489                                 log_warning(LOG_PROTOCOL, _("Can't start TLS session.\n"));
3490                                 return ok;
3491                         } else {
3492                                 /* refresh capas */
3493                                 imap_free_capabilities(session);
3494                                 if ((r = imap_get_capabilities(session)) != MAILIMAP_NO_ERROR) {
3495                                         imap_handle_error(SESSION(session), r);
3496                                         log_warning(LOG_PROTOCOL, _("Can't refresh capabilities.\n"));
3497                                         return r;
3498                                 }
3499                         }
3500 #else
3501                         log_error(LOG_PROTOCOL, _("Connection to %s failed: "
3502                                         "server requires TLS, but Claws Mail "
3503                                         "has been compiled without OpenSSL "
3504                                         "support.\n"),
3505                                         SESSION(session)->server);
3506                         return MAILIMAP_ERROR_LOGIN;
3507 #endif
3508                 } else {
3509                         log_error(LOG_PROTOCOL, _("Server logins are disabled.\n"));
3510                         return MAILIMAP_ERROR_LOGIN;
3511                 }
3512         }
3513
3514         log_print(LOG_PROTOCOL, "IMAP4> Logging %s to %s using %s\n",
3515                         user,
3516                         SESSION(session)->server,
3517                         type);
3518         r = imap_threaded_login(session->folder, user, pass, type);
3519         if (r != MAILIMAP_NO_ERROR) {
3520                 imap_handle_error(SESSION(session), r);
3521                 log_print(LOG_PROTOCOL, "IMAP4< Error logging in to %s\n",
3522                                 SESSION(session)->server);
3523                 ok = r;
3524         } else {
3525                 log_print(LOG_PROTOCOL, "IMAP4< Login to %s successful\n",
3526                                 SESSION(session)->server);
3527                 ok = MAILIMAP_NO_ERROR;
3528         }
3529         return ok;
3530 }
3531
3532 static gint imap_cmd_noop(IMAPSession *session)
3533 {
3534         int r;
3535         unsigned int exists, recent, expunge, unseen, uidnext, uidval;
3536
3537         r = imap_threaded_noop(session->folder, &exists, &recent, &expunge, &unseen, &uidnext, &uidval);
3538         if (r != MAILIMAP_NO_ERROR) {
3539                 imap_handle_error(SESSION(session), r);
3540                 debug_print("noop err %d\n", r);
3541                 return r;
3542         }
3543
3544         session->folder_content_changed = FALSE;
3545
3546         if ((exists && exists != session->exists)
3547          || (recent && recent != session->recent)
3548          || (expunge && expunge != session->expunge)
3549          || (unseen && unseen != session->unseen)) {
3550                 session->folder_content_changed = TRUE;
3551         }
3552         if (uidnext != 0 && uidnext != session->uid_next) {
3553                 session->uid_next = uidnext;
3554                 session->folder_content_changed = TRUE;
3555         }
3556         if (uidval != 0 && uidval != session->uid_validity) {
3557                 session->uid_validity = uidval;
3558                 session->folder_content_changed = TRUE;
3559         }
3560
3561         session->exists = exists;
3562         session->recent = recent;
3563         session->expunge = expunge;
3564         session->unseen = unseen;
3565
3566         session_set_access_time(SESSION(session));
3567
3568         return MAILIMAP_NO_ERROR;
3569 }
3570
3571 #if (defined(USE_OPENSSL) || defined (USE_GNUTLS))
3572 static gint imap_cmd_starttls(IMAPSession *session)
3573 {
3574         int r;
3575
3576         r = imap_threaded_starttls(session->folder,
3577                 SESSION(session)->server, SESSION(session)->port);
3578         if (r != MAILIMAP_NO_ERROR) {
3579                 imap_handle_error(SESSION(session), r);
3580                 debug_print("starttls err %d\n", r);
3581                 return r;
3582         }
3583         return MAILIMAP_NO_ERROR;
3584 }
3585 #endif
3586
3587 static gint imap_cmd_select(IMAPSession *session, const gchar *folder,
3588                             gint *exists, gint *recent, gint *unseen,
3589                             guint32 *uid_validity, gint *can_create_flags,
3590                             GSList **ok_flags, gboolean block)
3591 {
3592         int r;
3593
3594         r = imap_threaded_select(session->folder, folder,
3595                                  exists, recent, unseen, uid_validity, can_create_flags, ok_flags);
3596         if (r != MAILIMAP_NO_ERROR) {
3597                 imap_handle_error(SESSION(session), r);
3598                 debug_print("select err %d\n", r);
3599                 return r;
3600         }
3601         return MAILIMAP_NO_ERROR;
3602 }
3603
3604 static gint imap_cmd_close(IMAPSession *session)
3605 {
3606         int r;
3607
3608         r = imap_threaded_close(session->folder);
3609         if (r != MAILIMAP_NO_ERROR) {
3610                 imap_handle_error(SESSION(session), r);
3611                 debug_print("close err %d\n", r);
3612                 return r;
3613         }
3614         g_free(session->mbox);
3615         session->mbox = NULL;
3616         session->exists = 0;
3617         session->recent = 0;
3618         session->expunge = 0;
3619         return MAILIMAP_NO_ERROR;
3620 }
3621
3622 static gint imap_cmd_examine(IMAPSession *session, const gchar *folder,
3623                              gint *exists, gint *recent, gint *unseen,
3624                              guint32 *uid_validity, gboolean block)
3625 {
3626         int r;
3627
3628         r = imap_threaded_examine(session->folder, folder,
3629                                   exists, recent, unseen, uid_validity);
3630         if (r != MAILIMAP_NO_ERROR) {
3631                 imap_handle_error(SESSION(session), r);
3632                 debug_print("examine err %d\n", r);
3633
3634                 return r;
3635         }
3636         return MAILIMAP_NO_ERROR;
3637 }
3638
3639 static gint imap_cmd_create(IMAPSession *session, const gchar *folder)
3640 {
3641         int r;
3642
3643         r = imap_threaded_create(session->folder, folder);
3644         if (r != MAILIMAP_NO_ERROR) {
3645                 imap_handle_error(SESSION(session), r);
3646                 return r;
3647         }
3648
3649         return MAILIMAP_NO_ERROR;
3650 }
3651
3652 static gint imap_cmd_rename(IMAPSession *session, const gchar *old_folder,
3653                             const gchar *new_folder)
3654 {
3655         int r;
3656
3657         r = imap_threaded_rename(session->folder, old_folder,
3658                                  new_folder);
3659         if (r != MAILIMAP_NO_ERROR) {
3660                 imap_handle_error(SESSION(session), r);
3661                 return r;
3662         }
3663
3664         return MAILIMAP_NO_ERROR;
3665 }
3666
3667 static gint imap_cmd_delete(IMAPSession *session, const gchar *folder)
3668 {
3669         int r;
3670
3671
3672         r = imap_threaded_delete(session->folder, folder);
3673         if (r != MAILIMAP_NO_ERROR) {
3674                 imap_handle_error(SESSION(session), r);
3675                 return r;
3676         }
3677
3678         return MAILIMAP_NO_ERROR;
3679 }
3680
3681 typedef struct _fetch_data {
3682         IMAPSession *session;
3683         guint32 uid;
3684         const gchar *filename;
3685         gboolean headers;
3686         gboolean body;
3687         gboolean done;
3688 } fetch_data;
3689
3690 static void *imap_cmd_fetch_thread(void *data)
3691 {
3692         fetch_data *stuff = (fetch_data *)data;
3693         IMAPSession *session = stuff->session;
3694         guint32 uid = stuff->uid;
3695         const gchar *filename = stuff->filename;
3696         int r;
3697
3698         if (stuff->body) {
3699                 r = imap_threaded_fetch_content(session->folder,
3700                                                uid, 1, filename);
3701         }
3702         else {
3703                 r = imap_threaded_fetch_content(session->folder,
3704                                                 uid, 0, filename);
3705         }
3706         if (r != MAILIMAP_NO_ERROR) {
3707                 imap_handle_error(SESSION(session), r);
3708                 debug_print("fetch err %d\n", r);
3709                 return GINT_TO_POINTER(r);
3710         }
3711         return GINT_TO_POINTER(MAILIMAP_NO_ERROR);
3712 }
3713
3714 static gint imap_cmd_fetch(IMAPSession *session, guint32 uid,
3715                                 const gchar *filename, gboolean headers,
3716                                 gboolean body)
3717 {
3718         fetch_data *data = g_new0(fetch_data, 1);
3719         int result = 0;
3720         data->done = FALSE;
3721         data->session = session;
3722         data->uid = uid;
3723         data->filename = filename;
3724         data->headers = headers;
3725         data->body = body;
3726
3727         if (prefs_common.work_offline &&
3728             !inc_offline_should_override(FALSE,
3729                 _("Claws Mail needs network access in order "
3730                   "to access the IMAP server."))) {
3731                 g_free(data);
3732                 return -1;
3733         }
3734         statusbar_print_all(_("Fetching message..."));
3735         result = GPOINTER_TO_INT(imap_cmd_fetch_thread(data));
3736         statusbar_pop_all();
3737         g_free(data);
3738         return result;
3739 }
3740
3741
3742 static gint imap_cmd_append(IMAPSession *session,
3743                             IMAPFolderItem *item,
3744                             const gchar *destfolder,
3745                             const gchar *file, IMAPFlags flags,
3746                             guint32 *new_uid)
3747 {
3748         struct mailimap_flag_list * flag_list;
3749         int r;
3750
3751         g_return_val_if_fail(file != NULL, MAILIMAP_ERROR_BAD_STATE);
3752
3753         flag_list = imap_flag_to_lep(item, flags, NULL);
3754         lock_session(session);
3755         r = imap_threaded_append(session->folder, destfolder,
3756                          file, flag_list, (int *)new_uid);
3757         mailimap_flag_list_free(flag_list);
3758
3759         if (r != MAILIMAP_NO_ERROR) {
3760                 imap_handle_error(SESSION(session), r);
3761                 debug_print("append err %d\n", r);
3762                 return r;
3763         }
3764
3765         unlock_session(session);
3766
3767         return MAILIMAP_NO_ERROR;
3768 }
3769
3770 static gint imap_cmd_copy(IMAPSession *session, struct mailimap_set * set,
3771                           const gchar *destfolder, GRelation *uid_mapping,
3772                           struct mailimap_set **source, struct mailimap_set **dest)
3773 {
3774         int r;
3775
3776         g_return_val_if_fail(session != NULL, MAILIMAP_ERROR_BAD_STATE);
3777         g_return_val_if_fail(set != NULL, MAILIMAP_ERROR_BAD_STATE);
3778         g_return_val_if_fail(destfolder != NULL, MAILIMAP_ERROR_BAD_STATE);
3779
3780         r = imap_threaded_copy(session->folder, set, destfolder, source, dest);
3781         if (r != MAILIMAP_NO_ERROR) {
3782                 imap_handle_error(SESSION(session), r);
3783                 return r;
3784         }
3785
3786         return MAILIMAP_NO_ERROR;
3787 }
3788
3789 static gint imap_cmd_store(IMAPSession *session,
3790                            IMAPFolderItem *item,
3791                            struct mailimap_set * set,
3792                            IMAPFlags flags, GSList *tags, int do_add)
3793 {
3794         int r;
3795         struct mailimap_flag_list * flag_list = NULL;
3796         struct mailimap_store_att_flags * store_att_flags;
3797
3798         flag_list = imap_flag_to_lep(item, flags, tags);
3799
3800         if (do_add)
3801                 store_att_flags =
3802                         mailimap_store_att_flags_new_add_flags_silent(flag_list);
3803         else
3804                 store_att_flags =
3805                         mailimap_store_att_flags_new_remove_flags_silent(flag_list);
3806
3807         r = imap_threaded_store(session->folder, set, store_att_flags);
3808         mailimap_store_att_flags_free(store_att_flags);
3809         if (r != MAILIMAP_NO_ERROR) {
3810                 imap_handle_error(SESSION(session), r);
3811                 return r;
3812         }
3813
3814         return MAILIMAP_NO_ERROR;
3815 }
3816
3817 static gint imap_cmd_expunge(IMAPSession *session)
3818 {
3819         int r;
3820
3821         if (prefs_common.work_offline &&
3822             !inc_offline_should_override(FALSE,
3823                 _("Claws Mail needs network access in order "
3824                   "to access the IMAP server."))) {
3825                 return -1;
3826         }
3827
3828         r = imap_threaded_expunge(session->folder);
3829         if (r != MAILIMAP_NO_ERROR) {
3830                 imap_handle_error(SESSION(session), r);
3831                 return r;
3832         }
3833
3834         return MAILIMAP_NO_ERROR;
3835 }
3836
3837 static void imap_path_separator_subst(gchar *str, gchar separator)
3838 {
3839         gchar *p;
3840         gboolean in_escape = FALSE;
3841
3842         if (!separator || separator == '/') return;
3843
3844         for (p = str; *p != '\0'; p++) {
3845                 if (*p == '/' && !in_escape)
3846                         *p = separator;
3847                 else if (*p == '&' && *(p + 1) != '-' && !in_escape)
3848                         in_escape = TRUE;
3849                 else if (*p == '-' && in_escape)
3850                         in_escape = FALSE;
3851         }
3852 }
3853
3854 static gboolean imap_rename_folder_func(GNode *node, gpointer data)
3855 {
3856         FolderItem *item = node->data;
3857         gchar **paths = data;
3858         const gchar *oldpath = paths[0];
3859         const gchar *newpath = paths[1];
3860         gchar *real_oldpath, *real_newpath;
3861         gchar *base;
3862         gchar *new_itempath;
3863         gint oldpathlen;
3864         IMAPSession *session = imap_session_get(item->folder);
3865         gint ok;
3866         oldpathlen = strlen(oldpath);
3867         if (strncmp(oldpath, item->path, oldpathlen) != 0) {
3868                 g_warning("path doesn't match: %s, %s\n", oldpath, item->path);
3869                 return TRUE;
3870         }
3871
3872         base = item->path + oldpathlen;
3873         while (*base == G_DIR_SEPARATOR) base++;
3874         if (*base == '\0')
3875                 new_itempath = g_strdup(newpath);
3876         else
3877                 new_itempath = g_strconcat(newpath, G_DIR_SEPARATOR_S, base,
3878                                            NULL);
3879
3880         real_oldpath = imap_get_real_path(session, IMAP_FOLDER(item->folder), item->path, &ok);
3881         g_free(item->path);
3882         item->path = new_itempath;
3883
3884         real_newpath = imap_get_real_path(session, IMAP_FOLDER(item->folder), item->path, &ok);
3885
3886         imap_threaded_subscribe(item->folder, real_oldpath, FALSE);
3887         imap_threaded_subscribe(item->folder, real_newpath, TRUE);
3888
3889         g_free(real_oldpath);
3890         g_free(real_newpath);
3891         return FALSE;
3892 }
3893
3894 static gint get_list_of_uids(IMAPSession *session, Folder *folder, IMAPFolderItem *item, GSList **msgnum_list)
3895 {
3896         GSList *uidlist, *elem;
3897         int r = -1;
3898         clist * lep_uidlist;
3899         gint ok, nummsgs = 0, lastuid_old;
3900
3901         if (session == NULL) {
3902                 return -1;
3903         }
3904
3905         ok = imap_select(session, IMAP_FOLDER(folder), FOLDER_ITEM(item),
3906                          NULL, NULL, NULL, NULL, NULL, TRUE);
3907         if (ok != MAILIMAP_NO_ERROR) {
3908                 return -1;
3909         }
3910
3911         g_slist_free(item->uid_list);
3912         item->uid_list = NULL;
3913
3914         uidlist = NULL;
3915
3916         if (folder->account && folder->account->low_bandwidth) {
3917                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SIMPLE, NULL,
3918                                  &lep_uidlist);
3919         }
3920
3921         if (r == MAILIMAP_NO_ERROR) {
3922                 GSList * fetchuid_list =
3923                         imap_uid_list_from_lep(lep_uidlist);
3924                 mailimap_search_result_free(lep_uidlist);
3925
3926                 uidlist = g_slist_concat(fetchuid_list, uidlist);
3927         } else {
3928                 carray * lep_uidtab;
3929                 if (r != -1) { /* inited */
3930                         imap_handle_error(SESSION(session), r);
3931                         if (is_fatal(r))
3932                                 return -1;
3933                 }
3934                 r = imap_threaded_fetch_uid(folder, 1,
3935                                     &lep_uidtab);
3936                 if (r == MAILIMAP_NO_ERROR) {
3937                         GSList * fetchuid_list =
3938                                 imap_uid_list_from_lep_tab(lep_uidtab);
3939                         imap_fetch_uid_list_free(lep_uidtab);
3940                         uidlist = g_slist_concat(fetchuid_list, uidlist);
3941                 }
3942         }
3943
3944         if (r != MAILIMAP_NO_ERROR) {
3945                 imap_handle_error(SESSION(session), r);
3946                 return -1;
3947         }
3948
3949         lastuid_old = item->lastuid;
3950
3951         for (elem = uidlist; elem != NULL; elem = g_slist_next(elem)) {
3952                 guint msgnum;
3953
3954                 msgnum = GPOINTER_TO_INT(elem->data);
3955
3956                 *msgnum_list = g_slist_prepend(*msgnum_list, GINT_TO_POINTER(msgnum));
3957                 item->uid_list = g_slist_prepend(item->uid_list, GINT_TO_POINTER(msgnum));
3958                 nummsgs++;
3959         }
3960         g_slist_free(uidlist);
3961
3962         unlock_session(session); /* locked from imap_get_num_list */
3963
3964         return nummsgs;
3965
3966 }
3967
3968 gint imap_get_num_list(Folder *folder, FolderItem *_item, GSList **msgnum_list, gboolean *old_uids_valid)
3969 {
3970         IMAPFolderItem *item = (IMAPFolderItem *)_item;
3971         IMAPSession *session;
3972         gint nummsgs;
3973         GSList *uidlist = NULL;
3974         gchar *dir;
3975         gboolean selected_folder;
3976         gint known_list_len = 0;
3977         debug_print("get_num_list\n");
3978
3979         g_return_val_if_fail(folder != NULL, -1);
3980         g_return_val_if_fail(item != NULL, -1);
3981         g_return_val_if_fail(item->item.path != NULL, -1);
3982         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
3983         g_return_val_if_fail(folder->account != NULL, -1);
3984
3985         known_list_len = g_slist_length(item->uid_list);
3986         if (!item->should_update) {
3987                 debug_print("get_num_list: nothing to update\n");
3988                 *old_uids_valid = TRUE;
3989                 if (known_list_len == item->item.total_msgs
3990                  && known_list_len > 0) {
3991                         *msgnum_list = g_slist_copy(item->uid_list);
3992                         return known_list_len;
3993                 } else {
3994                         debug_print("don't know the list length...\n");
3995                 }
3996         }
3997
3998         if (prefs_common.work_offline &&
3999             !inc_offline_should_override(FALSE,
4000                 _("Claws Mail needs network access in order "
4001                   "to access the IMAP server."))) {
4002                 return -1;
4003         }
4004
4005         debug_print("getting session...\n");
4006         session = imap_session_get(folder);
4007         g_return_val_if_fail(session != NULL, -1);
4008
4009         lock_session(session); /* unlocked by get_list_of_uids */
4010         if (FOLDER_ITEM(item)->path)
4011                 statusbar_print_all(_("Scanning folder %s%c%s ..."),
4012                                       FOLDER_ITEM(item)->folder->name,
4013                                       G_DIR_SEPARATOR,
4014                                       FOLDER_ITEM(item)->path);
4015         else
4016                 statusbar_print_all(_("Scanning folder %s ..."),
4017                                       FOLDER_ITEM(item)->folder->name);
4018
4019         selected_folder = (session->mbox != NULL) &&
4020                           (!strcmp(session->mbox, item->item.path));
4021
4022         if (item->should_trash_cache) {
4023                 *old_uids_valid = FALSE;
4024                 debug_print("get_num_list: trashing num list\n");
4025                 debug_print("Freeing imap uid cache\n");
4026                 item->lastuid = 0;
4027                 g_slist_free(item->uid_list);
4028                 item->uid_list = NULL;
4029
4030                 imap_delete_all_cached_messages((FolderItem *)item);
4031         } else {
4032                 debug_print("get_num_list: updating num list\n");
4033                 *old_uids_valid = TRUE;
4034         }
4035
4036         nummsgs = get_list_of_uids(session, folder, item, &uidlist);
4037         /* session could be broken now, in case of fatal error */
4038
4039         debug_print("get_num_list: got %d msgs\n", nummsgs);
4040
4041         if (nummsgs < 0) {
4042                 statusbar_pop_all();
4043                 return -1;
4044         }
4045
4046         *msgnum_list = uidlist;
4047
4048         dir = folder_item_get_path((FolderItem *)item);
4049         debug_print("removing old messages from %s\n", dir);
4050         remove_numbered_files_not_in_list(dir, *msgnum_list);
4051         g_free(dir);
4052
4053         debug_print("get_num_list - ok - %i\n", nummsgs);
4054         statusbar_pop_all();
4055         item->should_trash_cache = FALSE;
4056         item->should_update = FALSE;
4057         return nummsgs;
4058 }
4059
4060 static MsgInfo *imap_parse_msg(const gchar *file, FolderItem *item)
4061 {
4062         MsgInfo *msginfo;
4063         MsgFlags flags;
4064
4065         flags.perm_flags = MSG_NEW|MSG_UNREAD;
4066         flags.tmp_flags = 0;
4067
4068         g_return_val_if_fail(item != NULL, NULL);
4069         g_return_val_if_fail(file != NULL, NULL);
4070
4071         if (folder_has_parent_of_type(item, F_QUEUE)) {
4072                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
4073         } else if (folder_has_parent_of_type(item, F_DRAFT)) {
4074                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
4075         }
4076
4077         msginfo = procheader_parse_file(file, flags, FALSE, FALSE);
4078         if (!msginfo) return NULL;
4079
4080         msginfo->plaintext_file = g_strdup(file);
4081         msginfo->folder = item;
4082
4083         return msginfo;
4084 }
4085
4086 GSList *imap_get_msginfos(Folder *folder, FolderItem *item,
4087                           GSList *msgnum_list)
4088 {
4089         IMAPSession *session;
4090         MsgInfoList *ret = NULL;
4091         gint ok;
4092
4093         debug_print("get_msginfos\n");
4094
4095         g_return_val_if_fail(folder != NULL, NULL);
4096         g_return_val_if_fail(item != NULL, NULL);
4097         g_return_val_if_fail(msgnum_list != NULL, NULL);
4098
4099         debug_print("getting session...\n");
4100         session = imap_session_get(folder);
4101         g_return_val_if_fail(session != NULL, NULL);
4102
4103         lock_session(session); /* unlocked later in the function */
4104
4105         debug_print("IMAP getting msginfos\n");
4106         ok = imap_select(session, IMAP_FOLDER(folder), item,
4107                          NULL, NULL, NULL, NULL, NULL, FALSE);
4108         if (ok != MAILIMAP_NO_ERROR) {
4109                 return NULL;
4110         }
4111         if (!(folder_has_parent_of_type(item, F_DRAFT) ||
4112               folder_has_parent_of_type(item, F_QUEUE))) {
4113                 ret = g_slist_concat(ret,
4114                         imap_get_uncached_messages(session, item,
4115                                                    msgnum_list, &ok));
4116                 if (ok != MAILIMAP_NO_ERROR)
4117                         return NULL;
4118                 unlock_session(session);
4119         } else {
4120                 MsgNumberList *sorted_list, *elem, *llast = NULL;
4121                 gint startnum, lastnum;
4122
4123                 unlock_session(session);
4124
4125                 sorted_list = g_slist_sort(g_slist_copy(msgnum_list), g_int_compare);
4126
4127                 startnum = lastnum = GPOINTER_TO_INT(sorted_list->data);
4128
4129                 llast = g_slist_last(ret);
4130                 for (elem = sorted_list;; elem = g_slist_next(elem)) {
4131                         guint num = 0;
4132
4133                         if (elem)
4134                                 num = GPOINTER_TO_INT(elem->data);
4135
4136                         if (num > lastnum + 1 || elem == NULL) {
4137                                 int i;
4138                                 for (i = startnum; i <= lastnum; ++i) {
4139                                         gchar *file;
4140                                         file = imap_fetch_msg(folder, item, i);
4141                                         if (file != NULL) {
4142                                                 MsgInfo *msginfo = imap_parse_msg(file, item);
4143                                                 if (msginfo != NULL) {
4144                                                         msginfo->msgnum = i;
4145                                                         if (llast == NULL)
4146                                                                 llast = ret = g_slist_append(ret, msginfo);
4147                                                         else {
4148                                                                 llast = g_slist_append(llast, msginfo);
4149                                                                 llast = llast->next;
4150                                                         }
4151                                                 }
4152                                                 g_free(file);
4153                                         }
4154                                 }
4155
4156                                 if (elem == NULL)
4157                                         break;
4158
4159                                 startnum = num;
4160                         }
4161                         lastnum = num;
4162                 }
4163
4164                 g_slist_free(sorted_list);
4165         }
4166         return ret;
4167 }
4168
4169 MsgInfo *imap_get_msginfo(Folder *folder, FolderItem *item, gint uid)
4170 {
4171         MsgInfo *msginfo = NULL;
4172         MsgInfoList *msginfolist;
4173         MsgNumberList numlist;
4174
4175         numlist.next = NULL;
4176         numlist.data = GINT_TO_POINTER(uid);
4177
4178         msginfolist = imap_get_msginfos(folder, item, &numlist);
4179         if (msginfolist != NULL) {
4180                 msginfo = msginfolist->data;
4181                 g_slist_free(msginfolist);
4182         }
4183
4184         return msginfo;
4185 }
4186
4187 gboolean imap_scan_required(Folder *folder, FolderItem *_item)
4188 {
4189         IMAPSession *session;
4190         IMAPFolderItem *item = (IMAPFolderItem *)_item;
4191         gint ok, exists = 0, unseen = 0;
4192         guint32 uid_next = 0, uid_val = 0;
4193         gboolean selected_folder;
4194
4195         g_return_val_if_fail(folder != NULL, FALSE);
4196         g_return_val_if_fail(item != NULL, FALSE);
4197         g_return_val_if_fail(item->item.folder != NULL, FALSE);
4198         g_return_val_if_fail(FOLDER_CLASS(item->item.folder) == &imap_class, FALSE);
4199
4200         if (item->item.path == NULL)
4201                 return FALSE;
4202
4203         if (item->should_update) {
4204                 debug_print("scan already required\n");
4205                 return TRUE;
4206         }
4207         debug_print("getting session...\n");
4208         session = imap_session_get(folder);
4209
4210         g_return_val_if_fail(session != NULL, FALSE);
4211         lock_session(session); /* unlocked later in the function */
4212
4213         selected_folder = (session->mbox != NULL) &&
4214                           (!strcmp(session->mbox, item->item.path));
4215         if (selected_folder) {
4216                 if (!session->folder_content_changed) {
4217                         ok = imap_cmd_noop(session);
4218                         if (ok != MAILIMAP_NO_ERROR) {
4219                                 debug_print("disconnected!\n");
4220                                 if (!is_fatal(ok))
4221                                         session = imap_reconnect_if_possible(folder, session);
4222                                 else
4223                                         session = imap_session_get(folder);
4224                                 if (session == NULL)
4225                                         return FALSE;
4226                         }
4227
4228                         if (session->folder_content_changed) {
4229                                 debug_print("CHANGED (self-noop)! scan_required\n");
4230                                 item->should_update = TRUE;
4231                                 if (session->uid_validity && session->uid_validity != item->item.mtime) {
4232                                         item->item.mtime = session->uid_validity;
4233                                         item->should_trash_cache = TRUE;
4234                                 }
4235                                 unlock_session(session);
4236                                 return TRUE;
4237                         }
4238                 } else {
4239                         debug_print("CHANGED (previous noop)! scan_required\n");
4240                         item->should_update = TRUE;
4241                         if (session->uid_validity && session->uid_validity != item->item.mtime) {
4242                                 item->item.mtime = session->uid_validity;
4243                                 item->should_trash_cache = TRUE;
4244                         }
4245                         unlock_session(session);
4246                         return TRUE;
4247                 }
4248         } else {
4249                 ok = imap_status(session, IMAP_FOLDER(folder), item->item.path, IMAP_FOLDER_ITEM(item),
4250                                  &exists, &uid_next, &uid_val, &unseen, FALSE);
4251                 if (ok != MAILIMAP_NO_ERROR) {
4252                         return FALSE;
4253                 }
4254
4255                 debug_print("exists %d, item->item.total_msgs %d\n",
4256                         exists, item->item.total_msgs);
4257                 if (exists != item->item.total_msgs
4258                     || unseen != item->item.unread_msgs
4259                     || uid_next != item->uid_next
4260                     || uid_val != item->item.mtime) {
4261                         debug_print("CHANGED (status)! scan_required\n");
4262                         item->last_change = time(NULL);
4263                         item->should_update = TRUE;
4264                         item->uid_next = uid_next;
4265                         if (uid_val != item->item.mtime) {
4266                                 item->item.mtime = uid_val;
4267                                 item->should_trash_cache = TRUE;
4268                         }
4269                         unlock_session(session);
4270                         return TRUE;
4271                 }
4272         }
4273         unlock_session(session);
4274
4275         item->should_update = FALSE;
4276         return FALSE;
4277 }
4278
4279 void imap_change_flags(Folder *folder, FolderItem *item, MsgInfo *msginfo, MsgPermFlags newflags)
4280 {
4281         IMAPSession *session;
4282         IMAPFlags flags_set = 0, flags_unset = 0;
4283         gint ok = MAILIMAP_NO_ERROR;
4284         MsgNumberList numlist;
4285         hashtable_data *ht_data = NULL;
4286
4287         g_return_if_fail(folder != NULL);
4288         g_return_if_fail(folder->klass == &imap_class);
4289         g_return_if_fail(item != NULL);
4290         g_return_if_fail(item->folder == folder);
4291         g_return_if_fail(msginfo != NULL);
4292         g_return_if_fail(msginfo->folder == item);
4293
4294         if (!MSG_IS_MARKED(msginfo->flags) &&  (newflags & MSG_MARKED))
4295                 flags_set |= IMAP_FLAG_FLAGGED;
4296         if ( MSG_IS_MARKED(msginfo->flags) && !(newflags & MSG_MARKED))
4297                 flags_unset |= IMAP_FLAG_FLAGGED;
4298
4299         if (!MSG_IS_UNREAD(msginfo->flags) &&  (newflags & MSG_UNREAD))
4300                 flags_unset |= IMAP_FLAG_SEEN;
4301         if ( MSG_IS_UNREAD(msginfo->flags) && !(newflags & MSG_UNREAD))
4302                 flags_set |= IMAP_FLAG_SEEN;
4303
4304         if (!MSG_IS_REPLIED(msginfo->flags) &&  (newflags & MSG_REPLIED))
4305                 flags_set |= IMAP_FLAG_ANSWERED;
4306         if ( MSG_IS_REPLIED(msginfo->flags) && !(newflags & MSG_REPLIED))
4307                 flags_unset |= IMAP_FLAG_ANSWERED;
4308
4309         if (!MSG_IS_FORWARDED(msginfo->flags) &&  (newflags & MSG_FORWARDED))
4310                 flags_set |= IMAP_FLAG_FORWARDED;
4311         if ( MSG_IS_FORWARDED(msginfo->flags) && !(newflags & MSG_FORWARDED))
4312                 flags_unset |= IMAP_FLAG_FORWARDED;
4313
4314         if (!MSG_IS_SPAM(msginfo->flags) &&  (newflags & MSG_SPAM)) {
4315                 flags_set |= IMAP_FLAG_SPAM;
4316                 flags_unset |= IMAP_FLAG_HAM;
4317         }
4318         if ( MSG_IS_SPAM(msginfo->flags) && !(newflags & MSG_SPAM)) {
4319                 flags_set |= IMAP_FLAG_HAM;
4320                 flags_unset |= IMAP_FLAG_SPAM;
4321         }
4322         if (!MSG_IS_DELETED(msginfo->flags) &&  (newflags & MSG_DELETED))
4323                 flags_set |= IMAP_FLAG_DELETED;
4324         if ( MSG_IS_DELETED(msginfo->flags) && !(newflags & MSG_DELETED))
4325                 flags_unset |= IMAP_FLAG_DELETED;
4326
4327         if (!flags_set && !flags_unset) {
4328                 /* the changed flags were not translatable to IMAP-speak.
4329                  * like MSG_POSTFILTERED, so just apply. */
4330                 msginfo->flags.perm_flags = newflags;
4331                 return;
4332         }
4333
4334         debug_print("getting session...\n");
4335         session = imap_session_get(folder);
4336         if (!session) {
4337                 return;
4338         }
4339
4340         if ((ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
4341             NULL, NULL, NULL, NULL, NULL, FALSE)) != MAILIMAP_NO_ERROR) {
4342                 return;
4343         }
4344         numlist.next = NULL;
4345         numlist.data = GINT_TO_POINTER(msginfo->msgnum);
4346
4347         if (IMAP_FOLDER_ITEM(item)->batching) {
4348                 /* instead of performing an UID STORE command for each message change,
4349                  * as a lot of them can change "together", we just fill in hashtables
4350                  * and defer the treatment so that we're able to send only one
4351                  * command.
4352                  */
4353                 debug_print("IMAP batch mode on, deferring flags change\n");
4354                 if (flags_set) {
4355                         ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->flags_set_table,
4356                                 GINT_TO_POINTER(flags_set));
4357                         if (ht_data == NULL) {
4358                                 ht_data = g_new0(hashtable_data, 1);
4359                                 ht_data->item = IMAP_FOLDER_ITEM(item);
4360                                 g_hash_table_insert(IMAP_FOLDER_ITEM(item)->flags_set_table,
4361                                         GINT_TO_POINTER(flags_set), ht_data);
4362                         }
4363                         ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
4364                 }
4365                 if (flags_unset) {
4366                         ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->flags_unset_table,
4367                                 GINT_TO_POINTER(flags_unset));
4368                         if (ht_data == NULL) {
4369                                 ht_data = g_new0(hashtable_data, 1);
4370                                 ht_data->item = IMAP_FOLDER_ITEM(item);
4371                                 g_hash_table_insert(IMAP_FOLDER_ITEM(item)->flags_unset_table,
4372                                         GINT_TO_POINTER(flags_unset), ht_data);
4373                         }
4374                         ht_data->msglist = g_slist_prepend(ht_data->msglist,
4375                                         GINT_TO_POINTER(msginfo->msgnum));
4376                 }
4377         } else {
4378                 debug_print("IMAP changing flags\n");
4379                 if (flags_set) {
4380                         ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item), &numlist, flags_set, NULL, TRUE);
4381                         if (ok != MAILIMAP_NO_ERROR) {
4382                                 return;
4383                         }
4384                 }
4385
4386                 if (flags_unset) {
4387                         ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item), &numlist, flags_unset, NULL, FALSE);
4388                         if (ok != MAILIMAP_NO_ERROR) {
4389                                 return;
4390                         }
4391                 }
4392         }
4393         msginfo->flags.perm_flags = newflags;
4394         return;
4395 }
4396
4397 static gint imap_remove_msg(Folder *folder, FolderItem *item, gint uid)
4398 {
4399         gint ok;
4400         IMAPSession *session;
4401         gchar *dir;
4402         MsgNumberList numlist;
4403
4404         g_return_val_if_fail(folder != NULL, -1);
4405         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
4406         g_return_val_if_fail(item != NULL, -1);
4407
4408         debug_print("getting session...\n");
4409         session = imap_session_get(folder);
4410         if (!session) return -1;
4411
4412         ok = imap_select(session, IMAP_FOLDER(folder), item,
4413                          NULL, NULL, NULL, NULL, NULL, FALSE);
4414         if (ok != MAILIMAP_NO_ERROR) {
4415                 return ok;
4416         }
4417         numlist.next = NULL;
4418         numlist.data = GINT_TO_POINTER(uid);
4419
4420         ok = imap_set_message_flags
4421                 (session, IMAP_FOLDER_ITEM(item), &numlist, IMAP_FLAG_DELETED, NULL, TRUE);
4422         if (ok != MAILIMAP_NO_ERROR) {
4423                 log_warning(LOG_PROTOCOL, _("can't set deleted flags: %d\n"), uid);
4424                 return ok;
4425         }
4426
4427         if (!session->uidplus) {
4428                 ok = imap_cmd_expunge(session);
4429         } else {
4430                 gchar *uidstr;
4431
4432                 uidstr = g_strdup_printf("%u", uid);
4433                 ok = imap_cmd_expunge(session);
4434                 g_free(uidstr);
4435         }
4436         if (ok != MAILIMAP_NO_ERROR) {
4437                 log_warning(LOG_PROTOCOL, _("can't expunge\n"));
4438                 return ok;
4439         }
4440
4441         IMAP_FOLDER_ITEM(item)->uid_list = g_slist_remove(
4442             IMAP_FOLDER_ITEM(item)->uid_list, numlist.data);
4443         dir = folder_item_get_path(item);
4444         if (is_dir_exist(dir))
4445                 remove_numbered_files(dir, uid, uid);
4446         g_free(dir);
4447         return MAILIMAP_NO_ERROR;
4448 }
4449
4450 static gint compare_msginfo(gconstpointer a, gconstpointer b)
4451 {
4452         return ((MsgInfo *)a)->msgnum - ((MsgInfo *)b)->msgnum;
4453 }
4454
4455 static guint gslist_find_next_num(MsgNumberList **list, guint num)
4456 {
4457         GSList *elem;
4458
4459         g_return_val_if_fail(list != NULL, -1);
4460
4461         for (elem = *list; elem != NULL; elem = g_slist_next(elem))
4462                 if (GPOINTER_TO_INT(elem->data) >= num)
4463                         break;
4464         *list = elem;
4465         return elem != NULL ? GPOINTER_TO_INT(elem->data) : (gint)-1;
4466 }
4467
4468 static gboolean flag_ok(IMAPFolderItem *item, guint flag)
4469 {
4470         if (item->ok_flags && g_slist_find(item->ok_flags, GUINT_TO_POINTER(flag))) {
4471                 debug_print("flag %d is OK\n", flag);
4472                 return TRUE;
4473         }
4474         if (item->can_create_flags == ITEM_CAN_CREATE_FLAGS) {
4475                 debug_print("creating flags is OK\n");
4476                 return TRUE;
4477         }
4478         return FALSE;
4479 }
4480
4481 /*
4482  * NEW and DELETED flags are not syncronized
4483  * - The NEW/RECENT flags in IMAP folders can not really be directly
4484  *   modified by Sylpheed
4485  * - The DELETE/DELETED flag in IMAP and Sylpheed don't have the same
4486  *   meaning, in IMAP it always removes the messages from the FolderItem
4487  *   in Sylpheed it can mean to move the message to trash
4488  */
4489
4490 typedef struct _get_flags_data {
4491         Folder *folder;
4492         FolderItem *item;
4493         MsgInfoList *msginfo_list;
4494         GRelation *msgflags;
4495         gboolean full_search;
4496         gboolean done;
4497 } get_flags_data;
4498
4499 static /*gint*/ void *imap_get_flags_thread(void *data)
4500 {
4501         get_flags_data *stuff = (get_flags_data *)data;
4502         Folder *folder = stuff->folder;
4503         FolderItem *fitem = (FolderItem *) stuff->item;
4504         MsgInfoList *msginfo_list = stuff->msginfo_list;
4505         GRelation *msgflags = stuff->msgflags;
4506         GSList *elem;
4507         carray * lep_uidtab;
4508         IMAPSession *session;
4509         gint ok;
4510         int r = MAILIMAP_NO_ERROR;
4511         GHashTable *flags_hash = NULL;
4512         GHashTable *tags_hash = NULL;
4513         gboolean full_search = stuff->full_search;
4514         GSList *sorted_list = NULL;
4515         GSList *unseen = NULL, *answered = NULL, *flagged = NULL, *deleted = NULL, *forwarded = NULL, *spam = NULL;
4516         GSList *seq_list, *cur;
4517         gboolean reverse_seen = FALSE;
4518         gboolean selected_folder;
4519         gint exists_cnt, unseen_cnt;
4520         gboolean got_alien_tags = FALSE;
4521
4522         session = imap_session_get(folder);
4523
4524         if (session == NULL) {
4525                 stuff->done = TRUE;
4526                 return GINT_TO_POINTER(-1);
4527         }
4528         selected_folder = (session->mbox != NULL) &&
4529                           (!strcmp(session->mbox, fitem->path));
4530
4531         lock_session(session);
4532         if (!selected_folder) {
4533                 ok = imap_select(session, IMAP_FOLDER(folder), fitem,
4534                         &exists_cnt, NULL, &unseen_cnt, NULL, NULL, TRUE);
4535                 if (ok != MAILIMAP_NO_ERROR) {
4536                         stuff->done = TRUE;
4537                         return GINT_TO_POINTER(-1);
4538                 }
4539
4540                 if (unseen_cnt > exists_cnt / 2)
4541                         reverse_seen = TRUE;
4542         }
4543         else {
4544                 if (fitem->unread_msgs > fitem->total_msgs / 2)
4545                         reverse_seen = TRUE;
4546         }
4547
4548         sorted_list = g_slist_sort(g_slist_copy(msginfo_list), compare_msginfo);
4549         if (!full_search) {
4550                 seq_list = imap_get_lep_set_from_msglist(IMAP_FOLDER(folder), msginfo_list);
4551         } else {
4552                 struct mailimap_set * set;
4553                 set = mailimap_set_new_interval(1, 0);
4554                 seq_list = g_slist_append(NULL, set);
4555         }
4556
4557         if (folder->account && folder->account->low_bandwidth) {
4558                 for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
4559                         struct mailimap_set * imapset;
4560                         clist * lep_uidlist;
4561                         int r;
4562
4563                         imapset = cur->data;
4564                         if (reverse_seen) {
4565                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SEEN,
4566                                                          full_search ? NULL:imapset, &lep_uidlist);
4567                         }
4568                         else {
4569                                 r = imap_threaded_search(folder,
4570                                                          IMAP_SEARCH_TYPE_UNSEEN,
4571                                                          full_search ? NULL:imapset, &lep_uidlist);
4572                         }
4573                         if (r == MAILIMAP_NO_ERROR) {
4574                                 GSList * uidlist;
4575
4576                                 uidlist = imap_uid_list_from_lep(lep_uidlist);
4577                                 mailimap_search_result_free(lep_uidlist);
4578
4579                                 unseen = g_slist_concat(unseen, uidlist);
4580                         } else {
4581                                 imap_handle_error(SESSION(session), r);
4582                                 goto bail;
4583                         }
4584
4585                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_FLAGGED,
4586                                                  full_search ? NULL:imapset, &lep_uidlist);
4587                         if (r == MAILIMAP_NO_ERROR) {
4588                                 GSList * uidlist;
4589
4590                                 uidlist = imap_uid_list_from_lep(lep_uidlist);
4591                                 mailimap_search_result_free(lep_uidlist);
4592
4593                                 flagged = g_slist_concat(flagged, uidlist);
4594                         } else {
4595                                 imap_handle_error(SESSION(session), r);
4596                                 goto bail;
4597                         }
4598
4599                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
4600                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_ANSWERED,
4601                                                          full_search ? NULL:imapset, &lep_uidlist);
4602                                 if (r == MAILIMAP_NO_ERROR) {
4603                                         GSList * uidlist;
4604
4605                                         uidlist = imap_uid_list_from_lep(lep_uidlist);
4606                                         mailimap_search_result_free(lep_uidlist);
4607
4608                                         answered = g_slist_concat(answered, uidlist);
4609                                 } else {
4610                                         imap_handle_error(SESSION(session), r);
4611                                         goto bail;
4612                                 }
4613
4614                                 if (flag_ok(IMAP_FOLDER_ITEM(fitem), IMAP_FLAG_FORWARDED)) {
4615                                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_FORWARDED,
4616                                                                  full_search ? NULL:imapset, &lep_uidlist);
4617                                         if (r == MAILIMAP_NO_ERROR) {
4618                                                 GSList * uidlist;
4619
4620                                                 uidlist = imap_uid_list_from_lep(lep_uidlist);
4621                                                 mailimap_search_result_free(lep_uidlist);
4622
4623                                                 forwarded = g_slist_concat(forwarded, uidlist);
4624                                         } else {
4625                                                 imap_handle_error(SESSION(session), r);
4626                                                 goto bail;
4627                                         }
4628                                 }
4629
4630                                 if (flag_ok(IMAP_FOLDER_ITEM(fitem), IMAP_FLAG_SPAM)) {
4631                                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SPAM,
4632                                                                  full_search ? NULL:imapset, &lep_uidlist);
4633                                         if (r == MAILIMAP_NO_ERROR) {
4634                                                 GSList * uidlist;
4635
4636                                                 uidlist = imap_uid_list_from_lep(lep_uidlist);
4637                                                 mailimap_search_result_free(lep_uidlist);
4638
4639                                                 spam = g_slist_concat(spam, uidlist);
4640                                         } else {
4641                                                 imap_handle_error(SESSION(session), r);
4642                                                 goto bail;
4643                                         }
4644                                 }
4645
4646                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_DELETED,
4647                                                          full_search ? NULL:imapset, &lep_uidlist);
4648                                 if (r == MAILIMAP_NO_ERROR) {
4649                                         GSList * uidlist;
4650
4651                                         uidlist = imap_uid_list_from_lep(lep_uidlist);
4652                                         mailimap_search_result_free(lep_uidlist);
4653
4654                                         deleted = g_slist_concat(deleted, uidlist);
4655                                 } else {
4656                                         imap_handle_error(SESSION(session), r);
4657                                         goto bail;
4658                                 }
4659                         }
4660                 }
4661
4662         } else {
4663                 r = imap_threaded_fetch_uid_flags(folder, 1, &lep_uidtab);
4664                 if (r == MAILIMAP_NO_ERROR) {
4665                         flags_hash = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, NULL);
4666                         tags_hash = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, NULL);
4667                         imap_flags_hash_from_lep_uid_flags_tab(lep_uidtab, flags_hash, tags_hash);
4668                         imap_fetch_uid_flags_list_free(lep_uidtab);
4669                 } else {
4670                         imap_handle_error(SESSION(session), r);
4671                         goto bail;
4672                 }
4673         }
4674
4675 bail:
4676         if (r == MAILIMAP_NO_ERROR)
4677                 unlock_session(session);
4678
4679         for (elem = sorted_list; elem != NULL; elem = g_slist_next(elem)) {
4680                 MsgInfo *msginfo;
4681                 MsgPermFlags flags, oldflags;
4682                 gboolean wasnew;
4683
4684                 msginfo = (MsgInfo *) elem->data;
4685                 flags = msginfo->flags.perm_flags;
4686                 wasnew = (flags & MSG_NEW);
4687                 oldflags = flags & ~(MSG_NEW|MSG_UNREAD|MSG_REPLIED|MSG_FORWARDED|MSG_MARKED|MSG_DELETED|MSG_SPAM);
4688
4689                 if (folder->account && folder->account->low_bandwidth) {
4690                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
4691                                 flags &= ~((reverse_seen ? 0 : MSG_UNREAD | MSG_NEW) | MSG_REPLIED | MSG_FORWARDED | MSG_MARKED | MSG_SPAM);
4692                         } else {
4693                                 flags &= ~((reverse_seen ? 0 : MSG_UNREAD | MSG_NEW | MSG_MARKED));
4694                         }
4695                         if (reverse_seen)
4696                                 flags |= MSG_UNREAD | (wasnew ? MSG_NEW : 0);
4697                         if (gslist_find_next_num(&unseen, msginfo->msgnum) == msginfo->msgnum) {
4698                                 if (!reverse_seen) {
4699                                         flags |= MSG_UNREAD | (wasnew ? MSG_NEW : 0);
4700                                 } else {
4701                                         flags &= ~(MSG_UNREAD | MSG_NEW);
4702                                 }
4703                         }
4704
4705                         if (gslist_find_next_num(&flagged, msginfo->msgnum) == msginfo->msgnum)
4706                                 flags |= MSG_MARKED;
4707                         else
4708                                 flags &= ~MSG_MARKED;
4709
4710                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
4711                                 if (gslist_find_next_num(&answered, msginfo->msgnum) == msginfo->msgnum)
4712                                         flags |= MSG_REPLIED;
4713                                 else
4714                                         flags &= ~MSG_REPLIED;
4715                                 if (gslist_find_next_num(&forwarded, msginfo->msgnum) == msginfo->msgnum)
4716                                         flags |= MSG_FORWARDED;
4717                                 else
4718                                         flags &= ~MSG_FORWARDED;
4719                                 if (gslist_find_next_num(&spam, msginfo->msgnum) == msginfo->msgnum)
4720                                         flags |= MSG_SPAM;
4721                                 else
4722                                         flags &= ~MSG_SPAM;
4723                                 if (gslist_find_next_num(&deleted, msginfo->msgnum) == msginfo->msgnum)
4724                                         flags |= MSG_DELETED;
4725                                 else
4726                                         flags &= ~MSG_DELETED;
4727                         }
4728                 } else {
4729                         if (flags_hash != NULL) {
4730
4731                                 flags = GPOINTER_TO_INT(g_hash_table_lookup(flags_hash,
4732                                                 GINT_TO_POINTER(msginfo->msgnum)));
4733                         }
4734
4735                         if ((flags & MSG_UNREAD) == 0)
4736                                 flags &= ~MSG_NEW;
4737                         else if (wasnew)
4738                                 flags |= MSG_NEW;
4739                         flags |= oldflags;
4740
4741                         if (tags_hash != NULL) {
4742                                 GSList *tags = g_hash_table_lookup(tags_hash, GINT_TO_POINTER(msginfo->msgnum));
4743                                 GSList *cur;
4744
4745                                 if (tags != NULL) {
4746                                         g_slist_free(msginfo->tags);
4747                                         msginfo->tags = NULL;
4748                                 }
4749                                 for (cur = tags; cur; cur = cur->next) {
4750                                         gchar *real_tag = imap_modified_utf7_to_utf8(cur->data, TRUE);
4751                                         gint id = 0;
4752                                         id = tags_get_id_for_str(real_tag);
4753                                         if (id == -1) {
4754                                                 id = tags_add_tag(real_tag);
4755                                                 got_alien_tags = TRUE;
4756                                         }
4757                                         if (!g_slist_find(msginfo->tags, GINT_TO_POINTER(id))) {
4758                                                 msginfo->tags = g_slist_append(
4759                                                                 msginfo->tags,
4760                                                                 GINT_TO_POINTER(id));
4761                                         }
4762                                         g_free(real_tag);
4763                                 }
4764                                 slist_free_strings(tags);
4765                                 g_slist_free(tags);
4766                         }
4767                 }
4768
4769                 g_relation_insert(msgflags, msginfo, GINT_TO_POINTER(flags));
4770         }
4771
4772         if (got_alien_tags) {
4773                 tags_write_tags();
4774                 main_window_reflect_tags_changes(mainwindow_get_mainwindow());
4775         }
4776
4777         if (flags_hash)
4778                 g_hash_table_destroy(flags_hash);
4779         if (tags_hash)
4780                 g_hash_table_destroy(tags_hash);
4781
4782         imap_lep_set_free(seq_list);
4783         g_slist_free(flagged);
4784         g_slist_free(deleted);
4785         g_slist_free(answered);
4786         g_slist_free(forwarded);
4787         g_slist_free(spam);
4788         g_slist_free(unseen);
4789         g_slist_free(sorted_list);
4790
4791         stuff->done = TRUE;
4792         return GINT_TO_POINTER(0);
4793 }
4794
4795 static gint imap_get_flags(Folder *folder, FolderItem *item,
4796                            MsgInfoList *msginfo_list, GRelation *msgflags)
4797 {
4798         gint result;
4799         get_flags_data *data = g_new0(get_flags_data, 1);
4800         data->done = FALSE;
4801         data->folder = folder;
4802         data->item = item;
4803         data->msginfo_list = msginfo_list;
4804         data->msgflags = msgflags;
4805         data->full_search = FALSE;
4806
4807         GSList *tmp = NULL, *cur;
4808
4809         if (prefs_common.work_offline &&
4810             !inc_offline_should_override(FALSE,
4811                 _("Claws Mail needs network access in order "
4812                   "to access the IMAP server."))) {
4813                 g_free(data);
4814                 return -1;
4815         }
4816
4817         tmp = folder_item_get_msg_list(item);
4818
4819         if (g_slist_length(tmp) <= g_slist_length(msginfo_list))
4820                 data->full_search = TRUE;
4821
4822         for (cur = tmp; cur; cur = cur->next)
4823                 procmsg_msginfo_free((MsgInfo *)cur->data);
4824
4825         g_slist_free(tmp);
4826
4827         result = GPOINTER_TO_INT(imap_get_flags_thread(data));
4828
4829         g_free(data);
4830         return result;
4831
4832 }
4833
4834 static gboolean process_flags(gpointer key, gpointer value, gpointer user_data)
4835 {
4836         gboolean flags_set = GPOINTER_TO_INT(user_data);
4837         gint flags_value = GPOINTER_TO_INT(key);
4838         hashtable_data *data = (hashtable_data *)value;
4839         IMAPFolderItem *_item = data->item;
4840         FolderItem *item = (FolderItem *)_item;
4841         gint ok = MAILIMAP_ERROR_BAD_STATE;
4842         IMAPSession *session = NULL;
4843
4844         debug_print("getting session...\n");
4845         session = imap_session_get(item->folder);
4846
4847         data->msglist = g_slist_reverse(data->msglist);
4848
4849         debug_print("IMAP %ssetting flags to %d for %d messages\n",
4850                 flags_set?"":"un",
4851                 flags_value,
4852                 g_slist_length(data->msglist));
4853
4854         lock_session(session);
4855         if (session) {
4856                 ok = imap_select(session, IMAP_FOLDER(item->folder), item,
4857                          NULL, NULL, NULL, NULL, NULL, FALSE);
4858         }
4859         if (ok == MAILIMAP_NO_ERROR) {
4860                 ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item),
4861                         data->msglist, flags_value, NULL, flags_set);
4862         } else {
4863                 g_warning("can't select mailbox %s\n", item->path);
4864         }
4865
4866         if (!is_fatal(ok))
4867                 unlock_session(session);
4868
4869         g_slist_free(data->msglist);
4870         g_free(data);
4871         return TRUE;
4872 }
4873
4874 static gboolean process_tags(gpointer key, gpointer value, gpointer user_data)
4875 {
4876         gboolean tags_set = GPOINTER_TO_INT(user_data);
4877         TagsData *data = (TagsData *)value;
4878         IMAPFolderItem *_item = data->item;
4879         FolderItem *item = (FolderItem *)_item;
4880         gchar *str = data->str;
4881         gint ok = MAILIMAP_ERROR_BAD_STATE;
4882         IMAPSession *session = NULL;
4883
4884         debug_print("getting session...\n");
4885         session = imap_session_get(item->folder);
4886
4887         data->msglist = g_slist_reverse(data->msglist);
4888
4889         debug_print("IMAP %ssetting tags %s for %d messages\n",
4890                 tags_set?"":"un",
4891                 str,
4892                 g_slist_length(data->msglist));
4893
4894         lock_session(session);
4895         if (session) {
4896                 ok = imap_select(session, IMAP_FOLDER(item->folder), item,
4897                          NULL, NULL, NULL, NULL, NULL, FALSE);
4898         }
4899         if (ok == MAILIMAP_NO_ERROR) {
4900                 GSList list;
4901                 list.data = str;
4902                 list.next = NULL;
4903                 ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item),
4904                         data->msglist, 0, &list, tags_set);
4905         } else {
4906                 g_warning("can't select mailbox %s\n", item->path);
4907         }
4908
4909         if (!is_fatal(ok))
4910                 unlock_session(session);
4911
4912         g_slist_free(data->msglist);
4913         g_free(data->str);
4914         g_free(data);
4915         return TRUE;
4916 }
4917
4918 static void process_hashtable(IMAPFolderItem *item)
4919 {
4920         if (item->flags_set_table) {
4921                 g_hash_table_foreach_remove(item->flags_set_table, process_flags, GINT_TO_POINTER(TRUE));
4922                 g_hash_table_destroy(item->flags_set_table);
4923                 item->flags_set_table = NULL;
4924         }
4925         if (item->flags_unset_table) {
4926                 g_hash_table_foreach_remove(item->flags_unset_table, process_flags, GINT_TO_POINTER(FALSE));
4927                 g_hash_table_destroy(item->flags_unset_table);
4928                 item->flags_unset_table = NULL;
4929         }
4930         if (item->tags_set_table) {
4931                 g_hash_table_foreach_remove(item->tags_set_table, process_tags, GINT_TO_POINTER(TRUE));
4932                 g_hash_table_destroy(item->tags_set_table);
4933                 item->tags_set_table = NULL;
4934         }
4935         if (item->tags_unset_table) {
4936                 g_hash_table_foreach_remove(item->tags_unset_table, process_tags, GINT_TO_POINTER(FALSE));
4937                 g_hash_table_destroy(item->tags_unset_table);
4938                 item->tags_unset_table = NULL;
4939         }
4940
4941 }
4942
4943 static void imap_set_batch (Folder *folder, FolderItem *_item, gboolean batch)
4944 {
4945         IMAPFolderItem *item = (IMAPFolderItem *)_item;
4946         IMAPSession *session;
4947
4948         g_return_if_fail(item != NULL);
4949
4950         if (item->batching == batch)
4951                 return;
4952
4953         if (batch) {
4954                 item->batching = TRUE;
4955                 debug_print("IMAP switching to batch mode\n");
4956                 if (!item->flags_set_table) {
4957                         item->flags_set_table = g_hash_table_new(NULL, g_direct_equal);
4958                 }
4959                 if (!item->flags_unset_table) {
4960                         item->flags_unset_table = g_hash_table_new(NULL, g_direct_equal);
4961                 }
4962                 if (!item->tags_set_table) {
4963                         item->tags_set_table = g_hash_table_new(NULL, g_direct_equal);
4964                 }
4965                 if (!item->tags_unset_table) {
4966                         item->tags_unset_table = g_hash_table_new(NULL, g_direct_equal);
4967                 }
4968                 session = imap_session_get(folder);
4969                 if (session) {
4970                         imap_refresh_sensitivity(session);
4971                         session->sens_update_block = TRUE;
4972                 }
4973         } else {
4974                 debug_print("IMAP switching away from batch mode\n");
4975                 /* process stuff */
4976                 process_hashtable(item);
4977                 item->batching = FALSE;
4978                 session = imap_session_get(folder);
4979                 if (session) {
4980                         session->sens_update_block = FALSE;
4981                         imap_refresh_sensitivity(session);
4982                 }
4983         }
4984 }
4985
4986
4987
4988 /* data types conversion libetpan <-> claws */
4989
4990
4991
4992 #define ETPAN_IMAP_MB_MARKED      1
4993 #define ETPAN_IMAP_MB_UNMARKED    2
4994 #define ETPAN_IMAP_MB_NOSELECT    4
4995 #define ETPAN_IMAP_MB_NOINFERIORS 8
4996
4997 static int imap_flags_to_flags(struct mailimap_mbx_list_flags * imap_flags)
4998 {
4999   int flags;
5000   clistiter * cur;
5001
5002   flags = 0;
5003   if (imap_flags->mbf_type == MAILIMAP_MBX_LIST_FLAGS_SFLAG) {
5004     switch (imap_flags->mbf_sflag) {
5005     case MAILIMAP_MBX_LIST_SFLAG_MARKED:
5006       flags |= ETPAN_IMAP_MB_MARKED;
5007       break;
5008     case MAILIMAP_MBX_LIST_SFLAG_NOSELECT:
5009       flags |= ETPAN_IMAP_MB_NOSELECT;
5010       break;
5011     case MAILIMAP_MBX_LIST_SFLAG_UNMARKED:
5012       flags |= ETPAN_IMAP_MB_UNMARKED;
5013       break;
5014     }
5015   }
5016
5017   for(cur = clist_begin(imap_flags->mbf_oflags) ; cur != NULL ;
5018       cur = clist_next(cur)) {
5019     struct mailimap_mbx_list_oflag * oflag;
5020
5021     oflag = clist_content(cur);
5022
5023     switch (oflag->of_type) {
5024     case MAILIMAP_MBX_LIST_OFLAG_NOINFERIORS:
5025       flags |= ETPAN_IMAP_MB_NOINFERIORS;
5026       break;
5027     }
5028   }
5029
5030   return flags;
5031 }
5032
5033 static GSList * imap_list_from_lep(IMAPFolder * folder,
5034                                    clist * list, const gchar * real_path, gboolean all)
5035 {
5036         clistiter * iter;
5037         GSList * item_list = NULL, *llast = NULL;
5038
5039         for(iter = clist_begin(list) ; iter != NULL ;
5040             iter = clist_next(iter)) {
5041                 struct mailimap_mailbox_list * mb;
5042                 int flags;
5043                 char delimiter;
5044                 char * name;
5045                 char * dup_name;
5046                 gchar * base;
5047                 gchar * loc_name;
5048                 gchar * loc_path;
5049                 FolderItem *new_item;
5050
5051                 mb = clist_content(iter);
5052
5053                 if (mb == NULL)
5054                         continue;
5055
5056                 flags = 0;
5057                 if (mb->mb_flag != NULL)
5058                         flags = imap_flags_to_flags(mb->mb_flag);
5059
5060                 delimiter = mb->mb_delimiter;
5061                 name = mb->mb_name;
5062
5063                 dup_name = strdup(name);
5064                 if (delimiter != '\0')
5065                         subst_char(dup_name, delimiter, '/');
5066
5067                 base = g_path_get_basename(dup_name);
5068                 if (base[0] == '.') {
5069                         g_free(base);
5070                         free(dup_name);
5071                         continue;
5072                 }
5073                 if (!all && path_cmp(name, real_path) == 0) {
5074                         g_free(base);
5075                         free(dup_name);
5076                         continue;
5077                 }
5078
5079                 if (!all && dup_name[strlen(dup_name)-1] == '/') {
5080                         dup_name[strlen(dup_name)-1] = '\0';
5081                 }
5082
5083                 loc_name = imap_modified_utf7_to_utf8(base, FALSE);
5084                 loc_path = imap_modified_utf7_to_utf8(dup_name, FALSE);
5085
5086                 new_item = folder_item_new(FOLDER(folder), loc_name, loc_path);
5087                 if ((flags & ETPAN_IMAP_MB_NOINFERIORS) != 0)
5088                         new_item->no_sub = TRUE;
5089                 if (strcmp(dup_name, "INBOX") != 0 &&
5090                     ((flags & ETPAN_IMAP_MB_NOSELECT) != 0))
5091                         new_item->no_select = TRUE;
5092
5093                 if (item_list == NULL)
5094                         llast = item_list = g_slist_append(item_list, new_item);
5095                 else {
5096                         llast = g_slist_append(llast, new_item);
5097                         llast = llast->next;
5098                 }
5099                 debug_print("folder '%s' found.\n", loc_path);
5100                 g_free(base);
5101                 g_free(loc_path);
5102                 g_free(loc_name);
5103
5104                 free(dup_name);
5105         }
5106
5107         return item_list;
5108 }
5109
5110 static GSList * imap_get_lep_set_from_numlist(IMAPFolder *folder, MsgNumberList *numlist)
5111 {
5112         GSList *sorted_list, *cur;
5113         guint first, last, next;
5114         GSList *ret_list = NULL, *llast = NULL;
5115         struct mailimap_set * current_set;
5116         unsigned int item_count;
5117
5118         if (numlist == NULL)
5119                 return NULL;
5120
5121         current_set = mailimap_set_new_empty();
5122
5123         sorted_list = g_slist_copy(numlist);
5124         sorted_list = g_slist_sort(sorted_list, g_int_compare);
5125
5126         first = GPOINTER_TO_INT(sorted_list->data);
5127
5128         item_count = 0;
5129         for (cur = sorted_list; cur != NULL; cur = g_slist_next(cur)) {
5130                 if (GPOINTER_TO_INT(cur->data) == 0)
5131                         continue;
5132
5133                 item_count ++;
5134
5135                 last = GPOINTER_TO_INT(cur->data);
5136                 if (cur->next)
5137                         next = GPOINTER_TO_INT(cur->next->data);
5138                 else
5139                         next = 0;
5140
5141                 if (last + 1 != next || next == 0 || item_count >= folder->max_set_size) {
5142
5143                         struct mailimap_set_item * item;
5144                         item = mailimap_set_item_new(first, last);
5145                         mailimap_set_add(current_set, item);
5146
5147                         first = next;
5148
5149                         if (item_count >= folder->max_set_size) {
5150                                 if (ret_list == NULL)
5151                                         llast = ret_list = g_slist_append(ret_list,
5152                                                           current_set);
5153                                 else {
5154                                         llast = g_slist_append(llast, current_set);
5155                                         llast = llast->next;
5156                                 }
5157
5158                                 current_set = mailimap_set_new_empty();
5159                                 item_count = 0;
5160                         }
5161                 }
5162         }
5163
5164         if (clist_count(current_set->set_list) > 0) {
5165                 ret_list = g_slist_append(ret_list,
5166                                           current_set);
5167         }
5168
5169         g_slist_free(sorted_list);
5170
5171         return ret_list;
5172 }
5173
5174 static GSList * imap_get_lep_set_from_msglist(IMAPFolder *folder, MsgInfoList *msglist)
5175 {
5176         MsgNumberList *numlist = NULL;
5177         MsgInfoList *cur;
5178         GSList *seq_list;
5179
5180         for (cur = msglist; cur != NULL; cur = g_slist_next(cur)) {
5181                 MsgInfo *msginfo = (MsgInfo *) cur->data;
5182
5183                 numlist = g_slist_prepend(numlist, GINT_TO_POINTER(msginfo->msgnum));
5184         }
5185         numlist = g_slist_reverse(numlist);
5186         seq_list = imap_get_lep_set_from_numlist(folder, numlist);
5187         g_slist_free(numlist);
5188
5189         return seq_list;
5190 }
5191
5192 static GSList * imap_uid_list_from_lep(clist * list)
5193 {
5194         clistiter * iter;
5195         GSList * result;
5196
5197         result = NULL;
5198
5199         for(iter = clist_begin(list) ; iter != NULL ;
5200             iter = clist_next(iter)) {
5201                 uint32_t * puid;
5202
5203                 puid = clist_content(iter);
5204                 result = g_slist_prepend(result, GINT_TO_POINTER(* puid));
5205         }
5206
5207         result = g_slist_reverse(result);
5208         return result;
5209 }
5210
5211 static GSList * imap_uid_list_from_lep_tab(carray * list)
5212 {
5213         unsigned int i;
5214         GSList * result;
5215
5216         result = NULL;
5217
5218         for(i = 0 ; i < carray_count(list) ; i ++) {
5219                 uint32_t * puid;
5220
5221                 puid = carray_get(list, i);
5222                 result = g_slist_prepend(result, GINT_TO_POINTER(* puid));
5223         }
5224         result = g_slist_reverse(result);
5225         return result;
5226 }
5227
5228 static void imap_flags_hash_from_lep_uid_flags_tab(carray * list,
5229                                                    GHashTable * hash,
5230                                                    GHashTable * tags_hash)
5231 {
5232         unsigned int i;
5233         GSList * result;
5234
5235         result = NULL;
5236
5237         for(i = 0 ; i < carray_count(list) ; i += 3) {
5238                 uint32_t * puid;
5239                 int * pflags;
5240                 GSList *tags;
5241
5242                 puid = carray_get(list, i);
5243                 pflags = carray_get(list, i + 1);
5244                 tags = carray_get(list, i + 2);
5245
5246                 g_hash_table_insert(hash, GINT_TO_POINTER(*puid), GINT_TO_POINTER(* pflags));
5247                 g_hash_table_insert(tags_hash, GINT_TO_POINTER(*puid), tags);
5248         }
5249 }
5250
5251 static MsgInfo *imap_envelope_from_lep(struct imap_fetch_env_info * info,
5252                                        FolderItem *item)
5253 {
5254         MsgInfo *msginfo = NULL;
5255         guint32 uid = 0;
5256         goffset size = 0;
5257         MsgFlags flags = {0, 0};
5258
5259         if (info->headers == NULL)
5260                 return NULL;
5261
5262         MSG_SET_TMP_FLAGS(flags, MSG_IMAP);
5263         if (folder_has_parent_of_type(item, F_QUEUE)) {
5264                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
5265         } else if (folder_has_parent_of_type(item, F_DRAFT)) {
5266                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
5267         }
5268         flags.perm_flags = info->flags;
5269
5270         uid = info->uid;
5271         size = (goffset) info->size;
5272         msginfo = procheader_parse_str(info->headers, flags, FALSE, FALSE);
5273
5274         if (msginfo) {
5275                 msginfo->msgnum = uid;
5276                 msginfo->size = size;
5277         }
5278
5279         return msginfo;
5280 }
5281
5282 static void imap_lep_set_free(GSList *seq_list)
5283 {
5284         GSList * cur;
5285
5286         for(cur = seq_list ; cur != NULL ; cur = g_slist_next(cur)) {
5287                 struct mailimap_set * imapset;
5288
5289                 imapset = cur->data;
5290                 mailimap_set_free(imapset);
5291         }
5292         g_slist_free(seq_list);
5293 }
5294
5295 static struct mailimap_flag_list * imap_flag_to_lep(IMAPFolderItem *item, IMAPFlags flags, GSList *tags)
5296 {
5297         struct mailimap_flag_list * flag_list;
5298         GSList *cur = tags;
5299
5300         flag_list = mailimap_flag_list_new_empty();
5301
5302         if (IMAP_IS_SEEN(flags))
5303                 mailimap_flag_list_add(flag_list,
5304                                        mailimap_flag_new_seen());
5305         if (IMAP_IS_ANSWERED(flags))
5306                 mailimap_flag_list_add(flag_list,
5307                                        mailimap_flag_new_answered());
5308         if (IMAP_IS_FLAGGED(flags))
5309                 mailimap_flag_list_add(flag_list,
5310                                        mailimap_flag_new_flagged());
5311         if (IMAP_IS_DELETED(flags))
5312                 mailimap_flag_list_add(flag_list,
5313                                        mailimap_flag_new_deleted());
5314         if (IMAP_IS_DRAFT(flags))
5315                 mailimap_flag_list_add(flag_list,
5316                                        mailimap_flag_new_draft());
5317         if (IMAP_IS_FORWARDED(flags) && flag_ok(item, IMAP_FLAG_FORWARDED))
5318                 mailimap_flag_list_add(flag_list,
5319                                        mailimap_flag_new_flag_keyword(strdup("$Forwarded")));
5320         if (IMAP_IS_SPAM(flags) && flag_ok(item, IMAP_FLAG_SPAM))
5321                 mailimap_flag_list_add(flag_list,
5322                                        mailimap_flag_new_flag_keyword(strdup("Junk")));
5323         else if (IMAP_IS_HAM(flags) && flag_ok(item, IMAP_FLAG_HAM))
5324                 mailimap_flag_list_add(flag_list,
5325                                        mailimap_flag_new_flag_keyword(strdup("NonJunk")));
5326
5327         for (; cur; cur = cur->next) {
5328                 gchar *enc_str =
5329                         imap_utf8_to_modified_utf7(cur->data, TRUE);
5330                 g_strstrip(enc_str);
5331
5332                 mailimap_flag_list_add(flag_list,
5333                         mailimap_flag_new_flag_keyword(enc_str));
5334         }
5335
5336         return flag_list;
5337 }
5338
5339 guint imap_folder_get_refcnt(Folder *folder)
5340 {
5341         return ((IMAPFolder *)folder)->refcnt;
5342 }
5343
5344 void imap_folder_ref(Folder *folder)
5345 {
5346         ((IMAPFolder *)folder)->refcnt++;
5347 }
5348
5349 void imap_disconnect_all(void)
5350 {
5351         GList *list;
5352         gboolean short_timeout;
5353 #ifdef HAVE_NETWORKMANAGER_SUPPORT
5354         GError *error;
5355 #endif
5356
5357 #ifdef HAVE_NETWORKMANAGER_SUPPORT
5358         error = NULL;
5359         short_timeout = !networkmanager_is_online(&error);
5360         if(error) {
5361                 short_timeout = TRUE;
5362                 g_error_free(error);
5363         }
5364 #else
5365         short_timeout = TRUE;
5366 #endif
5367
5368         if(short_timeout)
5369                 imap_main_set_timeout(1);
5370
5371         for (list = account_get_list(); list != NULL; list = list->next) {
5372                 PrefsAccount *account = list->data;
5373                 if (account->protocol == A_IMAP4) {
5374                         RemoteFolder *folder = (RemoteFolder *)account->folder;
5375                         if (folder && folder->session) {
5376                                 IMAPSession *session = (IMAPSession *)folder->session;
5377                                 imap_threaded_disconnect(FOLDER(folder));
5378                                 SESSION(session)->state = SESSION_DISCONNECTED;
5379                                 SESSION(session)->sock = NULL;
5380                                 session_destroy(SESSION(session));
5381                                 folder->session = NULL;
5382                         }
5383                 }
5384         }
5385
5386         if(short_timeout)
5387                 imap_main_set_timeout(prefs_common.io_timeout_secs);
5388 }
5389
5390 void imap_folder_unref(Folder *folder)
5391 {
5392         if (((IMAPFolder *)folder)->refcnt > 0)
5393                 ((IMAPFolder *)folder)->refcnt--;
5394 }
5395
5396 void imap_cancel_all(void)
5397 {
5398         GList *folderlist;
5399         GList *cur;
5400
5401         folderlist = folder_get_list();
5402         for (cur = folderlist; cur != NULL; cur = g_list_next(cur)) {
5403                 Folder *folder = (Folder *) cur->data;
5404
5405                 if (folder->klass == &imap_class) {
5406                         if (imap_is_busy(folder)) {
5407                                 IMAPSession *imap_session;
5408                                 RemoteFolder *rfolder;
5409
5410                                 g_printerr("cancelled\n");
5411                                 imap_threaded_cancel(folder);
5412                                 rfolder = (RemoteFolder *) folder;
5413                                 imap_session = (IMAPSession *) rfolder->session;
5414                                 if (imap_session)
5415                                         imap_session->cancelled = 1;
5416                         }
5417                 }
5418         }
5419 }
5420
5421 gboolean imap_cancel_all_enabled(void)
5422 {
5423         GList *folderlist;
5424         GList *cur;
5425
5426         folderlist = folder_get_list();
5427         for (cur = folderlist; cur != NULL; cur = g_list_next(cur)) {
5428                 Folder *folder = (Folder *) cur->data;
5429
5430                 if (folder->klass == &imap_class) {
5431                         if (imap_is_busy(folder)) {
5432                                 return TRUE;
5433                         }
5434                 }
5435         }
5436
5437         return FALSE;
5438 }
5439
5440 static gboolean imap_is_busy(Folder *folder)
5441 {
5442         IMAPSession *imap_session;
5443         RemoteFolder *rfolder;
5444
5445         rfolder = (RemoteFolder *) folder;
5446         imap_session = (IMAPSession *) rfolder->session;
5447         if (imap_session == NULL)
5448                 return FALSE;
5449
5450         return imap_session->busy;
5451 }
5452
5453 #else /* HAVE_LIBETPAN */
5454
5455 static FolderClass imap_class;
5456
5457 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item);
5458 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag);
5459
5460 static Folder   *imap_folder_new        (const gchar    *name,
5461                                          const gchar    *path)
5462 {
5463         static gboolean missing_imap_warning = TRUE;
5464         if (missing_imap_warning) {
5465                 missing_imap_warning = FALSE;
5466                 alertpanel_error(
5467                         _("You have one or more IMAP accounts "
5468                           "defined. However this version of "
5469                           "Claws Mail has been built without "
5470                           "IMAP support; your IMAP account(s) are "
5471                           "disabled.\n\n"
5472                           "You probably need to "
5473                           "install libetpan and recompile "
5474                           "Claws Mail."));
5475         }
5476         return NULL;
5477 }
5478 static gint     imap_create_tree        (Folder         *folder)
5479 {
5480         return -1;
5481 }
5482 static FolderItem *imap_create_folder   (Folder         *folder,
5483                                          FolderItem     *parent,
5484                                          const gchar    *name)
5485 {
5486         return NULL;
5487 }
5488 static gint     imap_rename_folder      (Folder         *folder,
5489                                          FolderItem     *item,
5490                                          const gchar    *name)
5491 {
5492         return -1;
5493 }
5494
5495 gchar imap_get_path_separator_for_item(FolderItem *item)
5496 {
5497         return '/';
5498 }
5499
5500 FolderClass *imap_get_class(void)
5501 {
5502         if (imap_class.idstr == NULL) {
5503                 imap_class.type = F_IMAP;
5504                 imap_class.idstr = "imap";
5505                 imap_class.uistr = "IMAP4";
5506
5507                 imap_class.new_folder = imap_folder_new;
5508                 imap_class.create_tree = imap_create_tree;
5509                 imap_class.create_folder = imap_create_folder;
5510                 imap_class.rename_folder = imap_rename_folder;
5511
5512                 imap_class.set_xml = folder_set_xml;
5513                 imap_class.get_xml = folder_get_xml;
5514                 imap_class.item_set_xml = imap_item_set_xml;
5515                 imap_class.item_get_xml = imap_item_get_xml;
5516                 /* nothing implemented */
5517         }
5518
5519         return &imap_class;
5520 }
5521
5522 void imap_disconnect_all(void)
5523 {
5524 }
5525
5526 gint imap_subscribe(Folder *folder, FolderItem *item, gchar *rpath, gboolean sub)
5527 {
5528         return -1;
5529 }
5530
5531 GList * imap_scan_subtree(Folder *folder, FolderItem *item, gboolean unsubs_only, gboolean recursive)
5532 {
5533         return NULL;
5534 }
5535
5536 void imap_cache_msg(FolderItem *item, gint msgnum)
5537 {
5538 }
5539
5540 void imap_cancel_all(void)
5541 {
5542 }
5543
5544 gboolean imap_cancel_all_enabled(void)
5545 {
5546         return FALSE;
5547 }
5548
5549 #endif
5550
5551 #ifdef HAVE_LIBETPAN
5552 static void imap_synchronise(FolderItem *item, gint days)
5553 {
5554         if (IMAP_FOLDER_ITEM(item)->last_sync == IMAP_FOLDER_ITEM(item)->last_change) {
5555                 debug_print("%s already synced\n", item->path?item->path:item->name);
5556                 return;
5557         }
5558         debug_print("syncing %s\n", item->path?item->path:item->name);
5559         imap_gtk_synchronise(item, days);
5560         IMAP_FOLDER_ITEM(item)->last_sync = IMAP_FOLDER_ITEM(item)->last_change;
5561 }
5562 #endif
5563
5564 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag)
5565 {
5566 #ifdef HAVE_LIBETPAN
5567         GList *cur;
5568 #endif
5569         folder_item_set_xml(folder, item, tag);
5570
5571 #ifdef HAVE_LIBETPAN
5572         for (cur = tag->attr; cur != NULL; cur = g_list_next(cur)) {
5573                 XMLAttr *attr = (XMLAttr *) cur->data;
5574
5575                 if (!attr || !attr->name || !attr->value) continue;
5576                 if (!strcmp(attr->name, "uidnext"))
5577                         IMAP_FOLDER_ITEM(item)->uid_next = atoi(attr->value);
5578                 if (!strcmp(attr->name, "last_sync"))
5579                         IMAP_FOLDER_ITEM(item)->last_sync = atoi(attr->value);
5580                 if (!strcmp(attr->name, "last_change"))
5581                         IMAP_FOLDER_ITEM(item)->last_change = atoi(attr->value);
5582         }
5583         if (IMAP_FOLDER_ITEM(item)->last_change == 0)
5584                 IMAP_FOLDER_ITEM(item)->last_change = time(NULL);
5585 #endif
5586 }
5587
5588 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item)
5589 {
5590         XMLTag *tag;
5591
5592         tag = folder_item_get_xml(folder, item);
5593
5594 #ifdef HAVE_LIBETPAN
5595         xml_tag_add_attr(tag, xml_attr_new_int("uidnext",
5596                         IMAP_FOLDER_ITEM(item)->uid_next));
5597         xml_tag_add_attr(tag, xml_attr_new_int("last_sync",
5598                         IMAP_FOLDER_ITEM(item)->last_sync));
5599         xml_tag_add_attr(tag, xml_attr_new_int("last_change",
5600                         IMAP_FOLDER_ITEM(item)->last_change));
5601
5602 #endif
5603         return tag;
5604 }
5605
5606 /* ===================================================================
5607  * UTF-7 conversion routines as in RFC 2192
5608  * ===================================================================
5609  * These two functions from:
5610  * libimap library.
5611  * Copyright (C) 2003-2004 Pawel Salek. */
5612
5613 /* UTF7 modified base64 alphabet */
5614 static char base64chars[] =
5615   "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+,";
5616 #define UNDEFINED 64
5617
5618 /* UTF16 definitions */
5619 #define UTF16MASK       0x03FFUL
5620 #define UTF16SHIFT      10
5621 #define UTF16BASE       0x10000UL
5622 #define UTF16HIGHSTART  0xD800UL
5623 #define UTF16HIGHEND    0xDBFFUL
5624 #define UTF16LOSTART    0xDC00UL
5625 #define UTF16LOEND      0xDFFFUL
5626
5627
5628 /* Convert an IMAP mailbox to a UTF-8 string.
5629  *  dst needs to have roughly 4 times the storage space of src
5630  *    Hex encoding can triple the size of the input
5631  *    UTF-7 can be slightly denser than UTF-8
5632  *     (worst case: 8 octets UTF-7 becomes 9 octets UTF-8)
5633  */
5634 char* imap_modified_utf7_to_utf8(const char *mbox, gboolean change_spaces)
5635 {
5636   unsigned c, i, bitcount;
5637   unsigned long ucs4, utf16, bitbuf;
5638   unsigned char base64[256];
5639   const char *src;
5640   char *dst, *res  = malloc(2*strlen(mbox)+1);
5641
5642   bitbuf = 0;
5643   dst = res;
5644   src = mbox;
5645   if(!dst) return NULL;
5646   /* initialize modified base64 decoding table */
5647   memset(base64, UNDEFINED, sizeof (base64));
5648   for (i = 0; i < sizeof (base64chars); ++i) {
5649     base64[(unsigned)base64chars[i]] = i;
5650   }
5651
5652   /* loop until end of string */
5653   while (*src != '\0') {
5654     c = *src++;
5655     /* deal with literal characters and &- */
5656     if (c != '&' || *src == '-') {
5657       /* encode literally */
5658       if (change_spaces && c == '_')
5659         *dst++ = ' ';
5660       else
5661         *dst++ = c;
5662       /* skip over the '-' if this is an &- sequence */
5663       if (c == '&') ++src;
5664     } else {
5665       /* convert modified UTF-7 -> UTF-16 -> UCS-4 -> UTF-8 -> HEX */
5666       bitbuf = 0;
5667       bitcount = 0;
5668       ucs4 = 0;
5669       while ((c = base64[(unsigned char) *src]) != UNDEFINED) {
5670         ++src;
5671         bitbuf = (bitbuf << 6) | c;
5672         bitcount += 6;
5673         /* enough bits for a UTF-16 character? */
5674         if (bitcount >= 16) {
5675           bitcount -= 16;
5676           utf16 = (bitcount ? bitbuf >> bitcount
5677                    : bitbuf) & 0xffff;
5678           /* convert UTF16 to UCS4 */
5679           if
5680             (utf16 >= UTF16HIGHSTART && utf16 <= UTF16HIGHEND) {
5681             ucs4 = (utf16 - UTF16HIGHSTART) << UTF16SHIFT;
5682             continue;
5683           } else if
5684             (utf16 >= UTF16LOSTART && utf16 <= UTF16LOEND) {
5685             ucs4 += utf16 - UTF16LOSTART + UTF16BASE;
5686           } else {
5687             ucs4 = utf16;
5688           }
5689
5690           /* convert UTF-16 range of UCS4 to UTF-8 */
5691           if (ucs4 <= 0x7fUL) {
5692             dst[0] = ucs4;
5693             dst += 1;
5694           } else if (ucs4 <= 0x7ffUL) {
5695             dst[0] = 0xc0 | (ucs4 >> 6);
5696             dst[1] = 0x80 | (ucs4 & 0x3f);
5697             dst += 2;
5698           } else if (ucs4 <= 0xffffUL) {
5699             dst[0] = 0xe0 | (ucs4 >> 12);
5700             dst[1] = 0x80 | ((ucs4 >> 6) & 0x3f);
5701             dst[2] = 0x80 | (ucs4 & 0x3f);
5702             dst += 3;
5703           } else {
5704             dst[0] = 0xf0 | (ucs4 >> 18);
5705             dst[1] = 0x80 | ((ucs4 >> 12) & 0x3f);
5706             dst[2] = 0x80 | ((ucs4 >> 6) & 0x3f);
5707             dst[3] = 0x80 | (ucs4 & 0x3f);
5708             dst += 4;
5709           }
5710         }
5711       }
5712       /* skip over trailing '-' in modified UTF-7 encoding */
5713       if (*src == '-') ++src;
5714     }
5715   }
5716   /* terminate destination string */
5717   *dst = '\0';
5718   return res;
5719 }
5720
5721 /* Convert hex coded UTF-8 string to modified UTF-7 IMAP mailbox
5722  *  dst should be about twice the length of src to deal with non-hex
5723  *  coded URLs
5724  */
5725 char* imap_utf8_to_modified_utf7(const char *src, gboolean change_spaces)
5726 {
5727   unsigned int utf8pos, utf8total, c, utf7mode, bitstogo, utf16flag;
5728   unsigned long ucs4 = 0, bitbuf = 0;
5729
5730   /* initialize hex lookup table */
5731   char *dst, *res = malloc(2*strlen(src)+1);
5732   dst = res;
5733   if(!dst) return NULL;
5734
5735   utf7mode = 0;
5736   utf8total = 0;
5737   bitstogo = 0;
5738   utf8pos = 0;
5739   while ((c = (unsigned char)*src) != '\0') {
5740     ++src;
5741     /* normal character? */
5742     if (c >= ' ' && c <= '~' && (c != '_' || !change_spaces)) {
5743       /* switch out of UTF-7 mode */
5744       if (utf7mode) {
5745         if (bitstogo) {
5746           *dst++ = base64chars[(bitbuf << (6 - bitstogo)) & 0x3F];
5747         }
5748         *dst++ = '-';
5749         utf7mode = 0;
5750         utf8pos  = 0;
5751         bitstogo = 0;
5752         utf8total= 0;
5753       }
5754       if (change_spaces && c == ' ')
5755         *dst++ = '_';
5756       else
5757         *dst++ = c;
5758       /* encode '&' as '&-' */
5759       if (c == '&') {
5760         *dst++ = '-';
5761       }
5762       continue;
5763     }
5764     /* switch to UTF-7 mode */
5765     if (!utf7mode) {
5766       *dst++ = '&';
5767       utf7mode = 1;
5768     }
5769     /* Encode US-ASCII characters as themselves */
5770     if (c < 0x80) {
5771       ucs4 = c;
5772       utf8total = 1;
5773     } else if (utf8total) {
5774       /* save UTF8 bits into UCS4 */
5775       ucs4 = (ucs4 << 6) | (c & 0x3FUL);
5776       if (++utf8pos < utf8total) {
5777         continue;
5778       }
5779     } else {
5780       utf8pos = 1;
5781       if (c < 0xE0) {
5782         utf8total = 2;
5783         ucs4 = c & 0x1F;
5784       } else if (c < 0xF0) {
5785         utf8total = 3;
5786         ucs4 = c & 0x0F;
5787       } else {
5788         /* NOTE: can't convert UTF8 sequences longer than 4 */
5789         utf8total = 4;
5790         ucs4 = c & 0x03;
5791       }
5792       continue;
5793     }
5794     /* loop to split ucs4 into two utf16 chars if necessary */
5795     utf8total = 0;
5796     do {
5797       if (ucs4 >= UTF16BASE) {
5798         ucs4 -= UTF16BASE;
5799         bitbuf = (bitbuf << 16) | ((ucs4 >> UTF16SHIFT)
5800                                    + UTF16HIGHSTART);
5801         ucs4 = (ucs4 & UTF16MASK) + UTF16LOSTART;
5802         utf16flag = 1;
5803       } else {
5804         bitbuf = (bitbuf << 16) | ucs4;
5805         utf16flag = 0;
5806       }
5807       bitstogo += 16;
5808       /* spew out base64 */
5809       while (bitstogo >= 6) {
5810         bitstogo -= 6;
5811         *dst++ = base64chars[(bitstogo ? (bitbuf >> bitstogo)
5812                               : bitbuf)
5813                              & 0x3F];
5814       }
5815     } while (utf16flag);
5816   }
5817   /* if in UTF-7 mode, finish in ASCII */
5818   if (utf7mode) {
5819     if (bitstogo) {
5820       *dst++ = base64chars[(bitbuf << (6 - bitstogo)) & 0x3F];
5821     }
5822     *dst++ = '-';
5823   }
5824   /* tie off string */
5825   *dst = '\0';
5826   return res;
5827 }