src/imap.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2014 Hiroyuki Yamamoto and the Claws Mail team
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #  include "config.h"
  22 #include "claws-features.h"
  23 #endif
  24
  25 #include "defs.h"
  26
  27 #include <glib.h>
  28 #include <glib/gi18n.h>
  29 #include <stdio.h>
  30 #include <string.h>
  31 #include "imap.h"
  32 #include "imap_gtk.h"
  33 #include "inc.h"
  34 #include "xml.h"
  35 #include "alertpanel.h"
  36
  37 #ifdef HAVE_LIBETPAN
  38
  39 #include <stdlib.h>
  40 #include <dirent.h>
  41 #include <unistd.h>
  42 #include <ctype.h>
  43 #include <time.h>
  44 #include <errno.h>
  45 #if HAVE_ICONV
  46 #  include <iconv.h>
  47 #endif
  48
  49 #ifdef USE_GNUTLS
  50 #  include "ssl.h"
  51 #endif
  52
  53 #include "folder.h"
  54 #include "session.h"
  55 #include "procmsg.h"
  56 #include "socket.h"
  57 #include "recv.h"
  58 #include "procheader.h"
  59 #include "prefs_account.h"
  60 #include "codeconv.h"
  61 #include "md5.h"
  62 #include "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         gchar *search_charset;
  98         gboolean search_charset_supported;
  99 };
 100
 101 struct _IMAPSession
 102 {
 103         Session session;
 104
 105         gboolean authenticated;
 106
 107         GSList *capability;
 108         gboolean uidplus;
 109
 110         gchar *mbox;
 111         guint cmd_count;
 112
 113         /* CLAWS */
 114         gboolean folder_content_changed;
 115         guint exists;
 116         guint recent;
 117         guint expunge;
 118         guint unseen;
 119         guint uid_validity;
 120         guint uid_next;
 121
 122         Folder * folder;
 123         gboolean busy;
 124         gboolean cancelled;
 125         gboolean sens_update_block;
 126         gboolean do_destroy;
 127 };
 128
 129 struct _IMAPNameSpace
 130 {
 131         gchar *name;
 132         gchar separator;
 133 };
 134
 135 #define IMAPBUFSIZE     8192
 136
 137 #define IMAP_IS_SEEN(flags)     ((flags & IMAP_FLAG_SEEN) != 0)
 138 #define IMAP_IS_ANSWERED(flags) ((flags & IMAP_FLAG_ANSWERED) != 0)
 139 #define IMAP_IS_FLAGGED(flags)  ((flags & IMAP_FLAG_FLAGGED) != 0)
 140 #define IMAP_IS_DELETED(flags)  ((flags & IMAP_FLAG_DELETED) != 0)
 141 #define IMAP_IS_DRAFT(flags)    ((flags & IMAP_FLAG_DRAFT) != 0)
 142 #define IMAP_IS_FORWARDED(flags)        ((flags & IMAP_FLAG_FORWARDED) != 0)
 143 #define IMAP_IS_SPAM(flags)     ((flags & IMAP_FLAG_SPAM) != 0)
 144 #define IMAP_IS_HAM(flags)      ((flags & IMAP_FLAG_HAM) != 0)
 145
 146
 147 #define IMAP4_PORT      143
 148 #ifdef USE_GNUTLS
 149 #define IMAPS_PORT      993
 150 #endif
 151
 152 #define IMAP_CMD_LIMIT  1000
 153
 154 enum {
 155         ITEM_CAN_CREATE_FLAGS_UNKNOWN = 0,
 156         ITEM_CAN_CREATE_FLAGS,
 157         ITEM_CANNOT_CREATE_FLAGS
 158 };
 159
 160 struct _IMAPFolderItem
 161 {
 162         FolderItem item;
 163
 164         guint lastuid;
 165         guint uid_next;
 166         GSList *uid_list;
 167         gboolean batching;
 168
 169         GHashTable *flags_set_table;
 170         GHashTable *flags_unset_table;
 171         guint32 last_change;
 172         guint32 last_sync;
 173         gboolean should_update;
 174         gboolean should_trash_cache;
 175         gint can_create_flags;
 176
 177         GHashTable *tags_set_table;
 178         GHashTable *tags_unset_table;
 179         GSList *ok_flags;
 180
 181 };
 182
 183 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item);
 184 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag);
 185
 186 static void imap_folder_init            (Folder         *folder,
 187                                          const gchar    *name,
 188                                          const gchar    *path);
 189
 190 static Folder   *imap_folder_new        (const gchar    *name,
 191                                          const gchar    *path);
 192 static void      imap_folder_destroy    (Folder         *folder);
 193
 194 static IMAPSession *imap_session_new    (Folder         *folder,
 195                                          const PrefsAccount     *account);
 196 static gint     imap_session_authenticate(IMAPSession   *session,
 197                                           PrefsAccount  *account);
 198 static void     imap_session_destroy    (Session        *session);
 199
 200 static gchar   *imap_fetch_msg          (Folder         *folder,
 201                                          FolderItem     *item,
 202                                          gint            uid);
 203 static gchar   *imap_fetch_msg_full     (Folder         *folder,
 204                                          FolderItem     *item,
 205                                          gint            uid,
 206                                          gboolean        headers,
 207                                          gboolean        body);
 208 static void     imap_remove_cached_msg  (Folder         *folder,
 209                                          FolderItem     *item,
 210                                          MsgInfo        *msginfo);
 211 static gint     imap_add_msg            (Folder         *folder,
 212                                          FolderItem     *dest,
 213                                          const gchar    *file,
 214                                          MsgFlags       *flags);
 215 static gint     imap_add_msgs           (Folder         *folder,
 216                                          FolderItem     *dest,
 217                                          GSList         *file_list,
 218                                          GHashTable     *relation);
 219
 220 static gint     imap_copy_msg           (Folder         *folder,
 221                                          FolderItem     *dest,
 222                                          MsgInfo        *msginfo);
 223 static gint     imap_copy_msgs          (Folder         *folder,
 224                                          FolderItem     *dest,
 225                                          MsgInfoList    *msglist,
 226                                          GHashTable     *relation);
 227
 228 static gint     search_msgs             (Folder                 *folder,
 229                                          FolderItem             *container,
 230                                          MsgNumberList          **msgs,
 231                                          gboolean               *on_server,
 232                                          MatcherList            *predicate,
 233                                          SearchProgressNotify   progress_cb,
 234                                          gpointer               progress_data);
 235
 236 static gint     imap_remove_msg         (Folder         *folder,
 237                                          FolderItem     *item,
 238                                          gint            uid);
 239 static gint     imap_remove_msgs        (Folder         *folder,
 240                                          FolderItem     *dest,
 241                                          MsgInfoList    *msglist,
 242                                          GHashTable     *relation);
 243 static gint     imap_expunge            (Folder         *folder,
 244                                          FolderItem     *dest);
 245 static gint     imap_remove_all_msg     (Folder         *folder,
 246                                          FolderItem     *item);
 247
 248 static gboolean imap_is_msg_changed     (Folder         *folder,
 249                                          FolderItem     *item,
 250                                          MsgInfo        *msginfo);
 251
 252 static gint     imap_close              (Folder         *folder,
 253                                          FolderItem     *item);
 254
 255 static gint     imap_scan_tree          (Folder         *folder);
 256
 257 static gint     imap_create_tree        (Folder         *folder);
 258
 259 static FolderItem *imap_create_folder   (Folder         *folder,
 260                                          FolderItem     *parent,
 261                                          const gchar    *name);
 262 static gint     imap_rename_folder      (Folder         *folder,
 263                                          FolderItem     *item,
 264                                          const gchar    *name);
 265 static gint     imap_remove_folder      (Folder         *folder,
 266                                          FolderItem     *item);
 267
 268 static FolderItem *imap_folder_item_new (Folder         *folder);
 269 static void imap_folder_item_destroy    (Folder         *folder,
 270                                          FolderItem     *item);
 271
 272 static IMAPSession *imap_session_get    (Folder         *folder);
 273
 274 static gint imap_auth                   (IMAPSession    *session,
 275                                          const gchar    *user,
 276                                          const gchar    *pass,
 277                                          IMAPAuthType    type);
 278
 279 static gint imap_scan_tree_recursive    (IMAPSession    *session,
 280                                          FolderItem     *item,
 281                                          gboolean        subs_only);
 282
 283 static void imap_create_missing_folders (Folder         *folder);
 284 static FolderItem *imap_create_special_folder
 285                                         (Folder                 *folder,
 286                                          SpecialFolderItemType   stype,
 287                                          const gchar            *name);
 288
 289 static gint imap_do_copy_msgs           (Folder         *folder,
 290                                          FolderItem     *dest,
 291                                          MsgInfoList    *msglist,
 292                                          GHashTable     *relation,
 293                                          gboolean        same_dest_ok);
 294
 295 static gint imap_do_remove_msgs         (Folder         *folder,
 296                                          FolderItem     *dest,
 297                                          MsgInfoList    *msglist,
 298                                          GHashTable     *relation);
 299
 300 static void imap_delete_all_cached_messages     (FolderItem     *item);
 301 static void imap_set_batch              (Folder         *folder,
 302                                          FolderItem     *item,
 303                                          gboolean        batch);
 304 static gint imap_set_message_flags      (IMAPSession    *session,
 305                                          IMAPFolderItem *item,
 306                                          MsgNumberList  *numlist,
 307                                          IMAPFlags       flags,
 308                                          GSList         *tags,
 309                                          gboolean        is_set);
 310 static gint imap_select                 (IMAPSession    *session,
 311                                          IMAPFolder     *folder,
 312                                          FolderItem     *item,
 313                                          gint           *exists,
 314                                          gint           *recent,
 315                                          gint           *unseen,
 316                                          guint32        *uid_validity,
 317                                          gint           *can_create_flags,
 318                                          gboolean        block);
 319 static gint imap_status                 (IMAPSession    *session,
 320                                          IMAPFolder     *folder,
 321                                          const gchar    *path,
 322                                          IMAPFolderItem *item,
 323                                          gint           *messages,
 324                                          guint32        *uid_next,
 325                                          guint32        *uid_validity,
 326                                          gint           *unseen,
 327                                          gboolean        block);
 328 static void     imap_commit_tags        (FolderItem     *item,
 329                                          MsgInfo        *msginfo,
 330                                          GSList         *set_tags,
 331                                          GSList         *unset_tags);
 332
 333 static gchar imap_get_path_separator            (IMAPSession    *session,
 334                                                  IMAPFolder     *folder,
 335                                                  const gchar    *path,
 336                                                  gint           *ok);
 337 static gchar *imap_get_real_path                (IMAPSession    *session,
 338                                                  IMAPFolder     *folder,
 339                                                  const gchar    *path,
 340                                                  gint           *ok);
 341 #ifdef HAVE_LIBETPAN
 342 static void imap_synchronise            (FolderItem     *item, gint days);
 343 #endif
 344 static gboolean imap_is_busy            (Folder *folder);
 345
 346 static void imap_free_capabilities      (IMAPSession    *session);
 347
 348 /* low-level IMAP4rev1 commands */
 349 static gint imap_cmd_login      (IMAPSession    *session,
 350                                  const gchar    *user,
 351                                  const gchar    *pass,
 352                                  const gchar    *type);
 353 static gint imap_cmd_noop       (IMAPSession    *session);
 354 #ifdef USE_GNUTLS
 355 static gint imap_cmd_starttls   (IMAPSession    *session);
 356 #endif
 357 static gint imap_cmd_select     (IMAPSession    *session,
 358                                  const gchar    *folder,
 359                                  gint           *exists,
 360                                  gint           *recent,
 361                                  gint           *unseen,
 362                                  guint32        *uid_validity,
 363                                  gint           *can_create_flags,
 364                                  GSList         **ok_flags,
 365                                  gboolean        block);
 366 static gint imap_cmd_close      (IMAPSession    *session);
 367 static gint imap_cmd_examine    (IMAPSession    *session,
 368                                  const gchar    *folder,
 369                                  gint           *exists,
 370                                  gint           *recent,
 371                                  gint           *unseen,
 372                                  guint32        *uid_validity,
 373                                  gboolean        block);
 374 static gint imap_cmd_create     (IMAPSession    *sock,
 375                                  const gchar    *folder);
 376 static gint imap_cmd_rename     (IMAPSession    *sock,
 377                                  const gchar    *oldfolder,
 378                                  const gchar    *newfolder);
 379 static gint imap_cmd_delete     (IMAPSession    *session,
 380                                  const gchar    *folder);
 381 static gint imap_cmd_fetch      (IMAPSession    *sock,
 382                                  guint32         uid,
 383                                  const gchar    *filename,
 384                                  gboolean        headers,
 385                                  gboolean        body);
 386 static gint imap_cmd_append     (IMAPSession    *session,
 387                                  IMAPFolderItem *item,
 388                                  const gchar    *destfolder,
 389                                  const gchar    *file,
 390                                  IMAPFlags       flags,
 391                                  guint32        *new_uid);
 392 static gint imap_cmd_copy       (IMAPSession *session,
 393                                  struct mailimap_set * set,
 394                                  const gchar *destfolder,
 395                                  struct mailimap_set ** source,
 396                                  struct mailimap_set ** dest);
 397 static gint imap_cmd_store      (IMAPSession    *session,
 398                                  IMAPFolderItem *item,
 399                                  struct mailimap_set * set,
 400                                  IMAPFlags flags,
 401                                  GSList *tags,
 402                                  int do_add);
 403 static gint imap_cmd_expunge    (IMAPSession    *session, gboolean force);
 404
 405 static void imap_path_separator_subst           (gchar          *str,
 406                                                  gchar           separator);
 407
 408 static gboolean imap_rename_folder_func         (GNode          *node,
 409                                                  gpointer        data);
 410 static gint imap_get_num_list                   (Folder         *folder,
 411                                                  FolderItem     *item,
 412                                                  GSList        **list,
 413                                                  gboolean       *old_uids_valid);
 414 static GSList *imap_get_msginfos                (Folder         *folder,
 415                                                  FolderItem     *item,
 416                                                  GSList         *msgnum_list);
 417 static MsgInfo *imap_get_msginfo                (Folder         *folder,
 418                                                  FolderItem     *item,
 419                                                  gint            num);
 420 static gboolean imap_scan_required              (Folder         *folder,
 421                                                  FolderItem     *item);
 422 static void imap_change_flags                   (Folder         *folder,
 423                                                  FolderItem     *item,
 424                                                  MsgInfo        *msginfo,
 425                                                  MsgPermFlags    newflags);
 426 static gint imap_get_flags                      (Folder         *folder,
 427                                                  FolderItem     *item,
 428                                                  MsgInfoList    *msglist,
 429                                                  GHashTable     *msgflags);
 430 static gchar *imap_folder_get_path              (Folder         *folder);
 431 static gchar *imap_item_get_path                (Folder         *folder,
 432                                                  FolderItem     *item);
 433 static MsgInfo *imap_parse_msg(const gchar *file, FolderItem *item);
 434
 435
 436 /* data types conversion libetpan <-> claws */
 437 static GSList * imap_list_from_lep(IMAPFolder * folder,
 438                                    clist * list, const gchar * real_path, gboolean all);
 439 static GSList * imap_get_lep_set_from_numlist(IMAPFolder *folder, MsgNumberList *numlist);
 440 static GSList * imap_get_lep_set_from_msglist(IMAPFolder *folder, MsgInfoList *msglist);
 441 static GSList * imap_uid_list_from_lep(clist * list, gint* length);
 442 static GSList * imap_uid_list_from_lep_tab(carray * list);
 443 static void imap_flags_hash_from_lep_uid_flags_tab(carray * list,
 444                                                    GHashTable * hash,
 445                                                    GHashTable *tags_hash);
 446 static MsgInfo *imap_envelope_from_lep(struct imap_fetch_env_info * info,
 447                                        FolderItem *item);
 448 static void imap_lep_set_free(GSList *seq_list);
 449 static struct mailimap_flag_list * imap_flag_to_lep(IMAPFolderItem *item, IMAPFlags flags, GSList *tags);
 450
 451 typedef struct _hashtable_data {
 452         GSList *msglist;
 453         IMAPFolderItem *item;
 454 } hashtable_data;
 455
 456 static FolderClass imap_class;
 457
 458 FolderClass *imap_get_class(void)
 459 {
 460         if (imap_class.idstr == NULL) {
 461                 imap_class.type = F_IMAP;
 462                 imap_class.idstr = "imap";
 463                 imap_class.uistr = "IMAP4";
 464                 imap_class.supports_server_search = TRUE;
 465
 466                 /* Folder functions */
 467                 imap_class.new_folder = imap_folder_new;
 468                 imap_class.destroy_folder = imap_folder_destroy;
 469                 imap_class.scan_tree = imap_scan_tree;
 470                 imap_class.create_tree = imap_create_tree;
 471
 472                 /* FolderItem functions */
 473                 imap_class.item_new = imap_folder_item_new;
 474                 imap_class.item_destroy = imap_folder_item_destroy;
 475                 imap_class.item_get_path = imap_item_get_path;
 476                 imap_class.create_folder = imap_create_folder;
 477                 imap_class.rename_folder = imap_rename_folder;
 478                 imap_class.remove_folder = imap_remove_folder;
 479                 imap_class.close = imap_close;
 480                 imap_class.get_num_list = imap_get_num_list;
 481                 imap_class.scan_required = imap_scan_required;
 482                 imap_class.set_xml = folder_set_xml;
 483                 imap_class.get_xml = folder_get_xml;
 484                 imap_class.item_set_xml = imap_item_set_xml;
 485                 imap_class.item_get_xml = imap_item_get_xml;
 486
 487                 /* Message functions */
 488                 imap_class.get_msginfo = imap_get_msginfo;
 489                 imap_class.get_msginfos = imap_get_msginfos;
 490                 imap_class.fetch_msg = imap_fetch_msg;
 491                 imap_class.fetch_msg_full = imap_fetch_msg_full;
 492                 imap_class.add_msg = imap_add_msg;
 493                 imap_class.add_msgs = imap_add_msgs;
 494                 imap_class.copy_msg = imap_copy_msg;
 495                 imap_class.copy_msgs = imap_copy_msgs;
 496                 imap_class.search_msgs = search_msgs;
 497                 imap_class.remove_msg = imap_remove_msg;
 498                 imap_class.remove_msgs = imap_remove_msgs;
 499                 imap_class.expunge = imap_expunge;
 500                 imap_class.remove_all_msg = imap_remove_all_msg;
 501                 imap_class.is_msg_changed = imap_is_msg_changed;
 502                 imap_class.change_flags = imap_change_flags;
 503                 imap_class.get_flags = imap_get_flags;
 504                 imap_class.set_batch = imap_set_batch;
 505                 imap_class.synchronise = imap_synchronise;
 506                 imap_class.remove_cached_msg = imap_remove_cached_msg;
 507                 imap_class.commit_tags = imap_commit_tags;
 508 #ifdef USE_PTREAD
 509                 pthread_mutex_init(&imap_mutex, NULL);
 510 #endif
 511         }
 512
 513         return &imap_class;
 514 }
 515
 516 static void imap_refresh_sensitivity (IMAPSession *session)
 517 {
 518         MainWindow *mainwin;
 519
 520         if (session->sens_update_block)
 521                 return;
 522         mainwin = mainwindow_get_mainwindow();
 523         if (mainwin) {
 524                 toolbar_main_set_sensitive(mainwin);
 525                 main_window_set_menu_sensitive(mainwin);
 526         }
 527 }
 528
 529 static void lock_session(IMAPSession *session)
 530 {
 531         if (session) {
 532                 debug_print("locking session %p (%d)\n", session, session->busy);
 533                 if (session->busy)
 534                         debug_print("         SESSION WAS LOCKED !!      \n");
 535                 session->busy = TRUE;
 536                 imap_refresh_sensitivity(session);
 537         } else {
 538                 debug_print("can't lock null session\n");
 539         }
 540 }
 541
 542 static void unlock_session(IMAPSession *session)
 543 {
 544         if (session) {
 545                 debug_print("unlocking session %p\n", session);
 546                 session->busy = FALSE;
 547                 imap_refresh_sensitivity(session);
 548         } else {
 549                 debug_print("can't unlock null session\n");
 550         }
 551 }
 552
 553 static gboolean imap_ping(gpointer data)
 554 {
 555         Session *session = (Session *)data;
 556         IMAPSession *imap_session = IMAP_SESSION(session);
 557         int r;
 558
 559         if (session->state != SESSION_READY)
 560                 return FALSE;
 561         if (imap_session->busy || !imap_session->authenticated)
 562                 return TRUE;
 563
 564         lock_session(imap_session);
 565         r = imap_cmd_noop(imap_session);
 566         unlock_session(imap_session);
 567
 568         return r == MAILIMAP_NO_ERROR;
 569 }
 570
 571 static void imap_disc_session_destroy(IMAPSession *session)
 572 {
 573         RemoteFolder *rfolder = NULL;
 574
 575         if (session == NULL)
 576                 return;
 577
 578         rfolder = REMOTE_FOLDER(IMAP_SESSION(session)->folder);
 579
 580         if (rfolder == NULL)
 581                 return;
 582         log_warning(LOG_PROTOCOL, _("IMAP4 connection broken\n"));
 583         SESSION(session)->state = SESSION_DISCONNECTED;
 584         SESSION(session)->sock = NULL;
 585 }
 586
 587 static void imap_safe_destroy(IMAPSession *session)
 588 {
 589         if (!session->busy)
 590                 session_destroy(SESSION(session));
 591         else
 592                 session->do_destroy = TRUE;
 593 }
 594
 595 static gboolean is_fatal(int libetpan_errcode)
 596 {
 597         switch(libetpan_errcode) {
 598         case MAILIMAP_ERROR_STREAM:
 599         case MAILIMAP_ERROR_PROTOCOL:
 600         case MAILIMAP_ERROR_PARSE:
 601         case MAILIMAP_ERROR_BAD_STATE:
 602                 return TRUE;
 603         default:
 604                 return FALSE;
 605         }
 606 }
 607
 608 static void imap_handle_error(Session *session, const gchar *server, int libetpan_errcode)
 609 {
 610         const gchar *session_server = (session ? session->server : NULL);
 611
 612         if (session_server == NULL)
 613                 session_server = server;
 614         if (session_server == NULL)
 615                 session_server = "(null)";
 616
 617         switch(libetpan_errcode) {
 618         case MAILIMAP_NO_ERROR:
 619                 return;
 620         case MAILIMAP_NO_ERROR_AUTHENTICATED:
 621                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: authenticated\n"), session_server);
 622                 break;
 623         case MAILIMAP_NO_ERROR_NON_AUTHENTICATED:
 624                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: not authenticated\n"), session_server);
 625                 break;
 626         case MAILIMAP_ERROR_BAD_STATE:
 627                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: bad state\n"), session_server);
 628                 break;
 629         case MAILIMAP_ERROR_STREAM:
 630                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: stream error\n"), session_server);
 631                 break;
 632         case MAILIMAP_ERROR_PARSE:
 633                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: parse error "
 634                                             "(very probably non-RFC compliance from the server)\n"), session_server);
 635                 break;
 636         case MAILIMAP_ERROR_CONNECTION_REFUSED:
 637                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: connection refused\n"), session_server);
 638                 break;
 639         case MAILIMAP_ERROR_MEMORY:
 640                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: memory error\n"), session_server);
 641                 break;
 642         case MAILIMAP_ERROR_FATAL:
 643                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: fatal error\n"), session_server);
 644                 break;
 645         case MAILIMAP_ERROR_PROTOCOL:
 646                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: protocol error"
 647                                             "(very probably non-RFC compliance from the server)\n"), session_server);
 648                 break;
 649         case MAILIMAP_ERROR_DONT_ACCEPT_CONNECTION:
 650                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: connection not accepted\n"), session_server);
 651                 break;
 652         case MAILIMAP_ERROR_APPEND:
 653                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: APPEND error\n"), session_server);
 654                 break;
 655         case MAILIMAP_ERROR_NOOP:
 656                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: NOOP error\n"), session_server);
 657                 break;
 658         case MAILIMAP_ERROR_LOGOUT:
 659                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: LOGOUT error\n"), session_server);
 660                 break;
 661         case MAILIMAP_ERROR_CAPABILITY:
 662                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: CAPABILITY error\n"), session_server);
 663                 break;
 664         case MAILIMAP_ERROR_CHECK:
 665                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: CHECK error\n"), session_server);
 666                 break;
 667         case MAILIMAP_ERROR_CLOSE:
 668                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: CLOSE error\n"), session_server);
 669                 break;
 670         case MAILIMAP_ERROR_EXPUNGE:
 671                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: EXPUNGE error\n"), session_server);
 672                 break;
 673         case MAILIMAP_ERROR_COPY:
 674                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: COPY error\n"), session_server);
 675                 break;
 676         case MAILIMAP_ERROR_UID_COPY:
 677                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: UID COPY error\n"), session_server);
 678                 break;
 679         case MAILIMAP_ERROR_CREATE:
 680                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: CREATE error\n"), session_server);
 681                 break;
 682         case MAILIMAP_ERROR_DELETE:
 683                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: DELETE error\n"), session_server);
 684                 break;
 685         case MAILIMAP_ERROR_EXAMINE:
 686                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: EXAMINE error\n"), session_server);
 687                 break;
 688         case MAILIMAP_ERROR_FETCH:
 689                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: FETCH error\n"), session_server);
 690                 break;
 691         case MAILIMAP_ERROR_UID_FETCH:
 692                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: UID FETCH error\n"), session_server);
 693                 break;
 694         case MAILIMAP_ERROR_LIST:
 695                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: LIST error\n"), session_server);
 696                 break;
 697         case MAILIMAP_ERROR_LOGIN:
 698                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: LOGIN error\n"), session_server);
 699                 break;
 700         case MAILIMAP_ERROR_LSUB:
 701                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: LSUB error\n"), session_server);
 702                 break;
 703         case MAILIMAP_ERROR_RENAME:
 704                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: RENAME error\n"), session_server);
 705                 break;
 706         case MAILIMAP_ERROR_SEARCH:
 707                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: SEARCH error\n"), session_server);
 708                 break;
 709         case MAILIMAP_ERROR_UID_SEARCH:
 710                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: UID SEARCH error\n"), session_server);
 711                 break;
 712         case MAILIMAP_ERROR_SELECT:
 713                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: SELECT error\n"), session_server);
 714                 break;
 715         case MAILIMAP_ERROR_STATUS:
 716                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: STATUS error\n"), session_server);
 717                 break;
 718         case MAILIMAP_ERROR_STORE:
 719                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: STORE error\n"), session_server);
 720                 break;
 721         case MAILIMAP_ERROR_UID_STORE:
 722                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: UID STORE error\n"), session_server);
 723                 break;
 724         case MAILIMAP_ERROR_SUBSCRIBE:
 725                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: SUBSCRIBE error\n"), session_server);
 726                 break;
 727         case MAILIMAP_ERROR_UNSUBSCRIBE:
 728                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: UNSUBSCRIBE error\n"), session_server);
 729                 break;
 730         case MAILIMAP_ERROR_STARTTLS:
 731                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: STARTTLS error\n"), session_server);
 732                 break;
 733         case MAILIMAP_ERROR_INVAL:
 734                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: INVAL error\n"), session_server);
 735                 break;
 736         case MAILIMAP_ERROR_EXTENSION:
 737                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: EXTENSION error\n"), session_server);
 738                 break;
 739         case MAILIMAP_ERROR_SASL:
 740                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: SASL error\n"), session_server);
 741                 break;
 742 #ifdef USE_GNUTLS
 743         case MAILIMAP_ERROR_SSL:
 744                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: SSL error\n"), session_server);
 745                 break;
 746 #endif
 747         default:
 748                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: Unknown error [%d]\n"),
 749                         session_server, libetpan_errcode);
 750                 break;
 751         }
 752
 753         if (session && is_fatal(libetpan_errcode)) {
 754                 imap_disc_session_destroy(IMAP_SESSION(session));
 755         } else if (session && !is_fatal(libetpan_errcode)) {
 756                 if (IMAP_SESSION(session)->busy)
 757                         unlock_session(IMAP_SESSION(session));
 758         }
 759 }
 760
 761 static Folder *imap_folder_new(const gchar *name, const gchar *path)
 762 {
 763         Folder *folder;
 764
 765         folder = (Folder *)g_new0(IMAPFolder, 1);
 766         folder->klass = &imap_class;
 767         imap_folder_init(folder, name, path);
 768
 769         return folder;
 770 }
 771
 772 static void imap_folder_destroy(Folder *folder)
 773 {
 774         while (imap_folder_get_refcnt(folder) > 0)
 775                 gtk_main_iteration();
 776
 777         g_free(IMAP_FOLDER(folder)->search_charset);
 778
 779         folder_remote_folder_destroy(REMOTE_FOLDER(folder));
 780         imap_done(folder);
 781 }
 782
 783 static void imap_folder_init(Folder *folder, const gchar *name,
 784                              const gchar *path)
 785 {
 786         folder_remote_folder_init((Folder *)folder, name, path);
 787         IMAP_FOLDER(folder)->max_set_size = IMAP_SET_MAX_COUNT;
 788         IMAP_FOLDER(folder)->search_charset_supported = TRUE;
 789         IMAP_FOLDER(folder)->search_charset = g_strdup(conv_get_locale_charset_str_no_utf8());
 790 }
 791
 792 static FolderItem *imap_folder_item_new(Folder *folder)
 793 {
 794         IMAPFolderItem *item;
 795
 796         item = g_new0(IMAPFolderItem, 1);
 797         item->lastuid = 0;
 798         item->uid_next = 0;
 799         item->uid_list = NULL;
 800
 801         return (FolderItem *)item;
 802 }
 803
 804 static void imap_folder_item_destroy(Folder *folder, FolderItem *_item)
 805 {
 806         IMAPFolderItem *item = (IMAPFolderItem *)_item;
 807
 808         g_return_if_fail(item != NULL);
 809         g_slist_free(item->uid_list);
 810
 811         g_free(_item);
 812 }
 813
 814 static gboolean imap_reset_uid_lists_func(GNode *node, gpointer data)
 815 {
 816         IMAPFolderItem *item = (IMAPFolderItem *)node->data;
 817
 818         item->lastuid = 0;
 819         g_slist_free(item->uid_list);
 820         item->uid_list = NULL;
 821
 822         return FALSE;
 823 }
 824
 825 static void imap_reset_uid_lists(Folder *folder)
 826 {
 827         if(folder->node == NULL)
 828                 return;
 829
 830         /* Destroy all uid lists and rest last uid */
 831         g_node_traverse(folder->node, G_IN_ORDER, G_TRAVERSE_ALL, -1, imap_reset_uid_lists_func, NULL);
 832 }
 833
 834 static int imap_get_capabilities(IMAPSession *session)
 835 {
 836         struct mailimap_capability_data *capabilities = NULL;
 837         clistiter *cur;
 838         int result;
 839
 840         if (session->capability != NULL)
 841                 return MAILIMAP_NO_ERROR;
 842
 843         result = imap_threaded_capability(session->folder, &capabilities);
 844
 845         if (result != MAILIMAP_NO_ERROR) {
 846                 return result;
 847         }
 848
 849         if (capabilities == NULL || capabilities->cap_list == NULL) {
 850                 return MAILIMAP_NO_ERROR;
 851         }
 852
 853         for(cur = clist_begin(capabilities->cap_list) ; cur != NULL ;
 854             cur = clist_next(cur)) {
 855                 struct mailimap_capability * cap =
 856                         clist_content(cur);
 857                 if (!cap || cap->cap_data.cap_name == NULL)
 858                         continue;
 859                 session->capability = g_slist_append
 860                                 (session->capability,
 861                                  g_strdup(cap->cap_data.cap_name));
 862                 debug_print("got capa %s\n", cap->cap_data.cap_name);
 863         }
 864         mailimap_capability_data_free(capabilities);
 865         return MAILIMAP_NO_ERROR;
 866 }
 867
 868 static gboolean imap_has_capability(IMAPSession *session, const gchar *cap)
 869 {
 870         GSList *cur;
 871         for (cur = session->capability; cur; cur = cur->next) {
 872                 if (!g_ascii_strcasecmp(cur->data, cap))
 873                         return TRUE;
 874         }
 875         return FALSE;
 876 }
 877
 878 static gint imap_auth(IMAPSession *session, const gchar *user, const gchar *pass,
 879                       IMAPAuthType type)
 880 {
 881         gint ok = MAILIMAP_ERROR_LOGIN;
 882         static time_t last_login_err = 0;
 883         gchar *ext_info = "";
 884         int r;
 885         gchar *server = NULL;
 886         if ((r = imap_get_capabilities(session)) != MAILIMAP_NO_ERROR) {
 887                 imap_handle_error(SESSION(session), NULL, r);
 888                 return r;
 889         }
 890         server = g_strdup(SESSION(session)->server);
 891         switch(type) {
 892         case IMAP_AUTH_ANON:
 893                 ok = imap_cmd_login(session, user, pass, "ANONYMOUS");
 894                 break;
 895         case IMAP_AUTH_CRAM_MD5:
 896                 ok = imap_cmd_login(session, user, pass, "CRAM-MD5");
 897                 break;
 898         case IMAP_AUTH_DIGEST_MD5:
 899                 ok = imap_cmd_login(session, user, pass, "DIGEST-MD5");
 900                 break;
 901         case IMAP_AUTH_SCRAM_SHA1:
 902                 ok = imap_cmd_login(session, user, pass, "SCRAM-SHA-1");
 903                 break;
 904         case IMAP_AUTH_LOGIN:
 905                 ok = imap_cmd_login(session, user, pass, "LOGIN");
 906                 break;
 907         case IMAP_AUTH_GSSAPI:
 908                 ok = imap_cmd_login(session, user, pass, "GSSAPI");
 909                 break;
 910         default:
 911                 debug_print("capabilities:\n"
 912                                 "\t ANONYMOUS %d\n"
 913                                 "\t CRAM-MD5 %d\n"
 914                                 "\t DIGEST-MD5 %d\n"
 915                                 "\t SCRAM-SHA-1 %d\n"
 916                                 "\t LOGIN %d\n"
 917                                 "\t GSSAPI %d\n",
 918                         imap_has_capability(session, "ANONYMOUS"),
 919                         imap_has_capability(session, "CRAM-MD5"),
 920                         imap_has_capability(session, "DIGEST-MD5"),
 921                         imap_has_capability(session, "SCRAM-SHA-1"),
 922                         imap_has_capability(session, "LOGIN"),
 923                         imap_has_capability(session, "GSSAPI"));
 924                 if (imap_has_capability(session, "CRAM-MD5"))
 925                         ok = imap_cmd_login(session, user, pass, "CRAM-MD5");
 926                 if (ok == MAILIMAP_ERROR_LOGIN && imap_has_capability(session, "DIGEST-MD5"))
 927                         ok = imap_cmd_login(session, user, pass, "DIGEST-MD5");
 928                 if (ok == MAILIMAP_ERROR_LOGIN && imap_has_capability(session, "SCRAM-SHA-1"))
 929                         ok = imap_cmd_login(session, user, pass, "SCRAM-SHA-1");
 930                 if (ok == MAILIMAP_ERROR_LOGIN && imap_has_capability(session, "GSSAPI"))
 931                         ok = imap_cmd_login(session, user, pass, "GSSAPI");
 932                 if (ok == MAILIMAP_ERROR_LOGIN) /* we always try LOGIN before giving up */
 933                         ok = imap_cmd_login(session, user, pass, "LOGIN");
 934         }
 935
 936         if (ok == MAILIMAP_NO_ERROR)
 937                 session->authenticated = TRUE;
 938         else {
 939                 if (type == IMAP_AUTH_CRAM_MD5) {
 940                         ext_info = _("\n\nCRAM-MD5 logins only work if libetpan has been "
 941                                      "compiled with SASL support and the "
 942                                      "CRAM-MD5 SASL plugin is installed.");
 943                 }
 944
 945                 if (type == IMAP_AUTH_DIGEST_MD5) {
 946                         ext_info = _("\n\nDIGEST-MD5 logins only work if libetpan has been "
 947                                      "compiled with SASL support and the "
 948                                      "DIGEST-MD5 SASL plugin is installed.");
 949                 }
 950
 951                 if (type == IMAP_AUTH_SCRAM_SHA1) {
 952                         ext_info = _("\n\nSCRAM-SHA-1 logins only work if libetpan has been "
 953                                      "compiled with SASL support and the "
 954                                      "SCRAM SASL plugin is installed.");
 955                 }
 956
 957                 if (time(NULL) - last_login_err > 10) {
 958                         if (!prefs_common.no_recv_err_panel) {
 959                                 alertpanel_error_log(_("Connection to %s failed: "
 960                                         "login refused.%s"),
 961                                         server, ext_info);
 962                         } else {
 963                                 log_error(LOG_PROTOCOL, _("Connection to %s failed: "
 964                                         "login refused.%s\n"),
 965                                         server, ext_info);
 966                         }
 967                 }
 968                 last_login_err = time(NULL);
 969         }
 970         g_free(server);
 971         return ok;
 972 }
 973
 974 static IMAPSession *imap_reconnect_if_possible(Folder *folder, IMAPSession *session)
 975 {
 976         RemoteFolder *rfolder = REMOTE_FOLDER(folder);
 977         /* Check if this is the first try to establish a
 978            connection, if yes we don't try to reconnect */
 979         debug_print("reconnecting\n");
 980         if (rfolder->session == NULL) {
 981                 log_warning(LOG_PROTOCOL, _("Connecting to %s failed"),
 982                             folder->account->recv_server);
 983                 SESSION(session)->sock = NULL;
 984                 imap_safe_destroy(session);
 985                 session = NULL;
 986         } else {
 987                 rfolder->session = NULL;
 988                 log_warning(LOG_PROTOCOL, _("IMAP4 connection to %s has been"
 989                             " disconnected. Reconnecting...\n"),
 990                             folder->account->recv_server);
 991                 statusbar_print_all(_("IMAP4 connection to %s has been"
 992                             " disconnected. Reconnecting...\n"),
 993                             folder->account->recv_server);
 994                 SESSION(session)->state = SESSION_DISCONNECTED;
 995                 SESSION(session)->sock = NULL;
 996                 imap_safe_destroy(session);
 997                 /* Clear folders session to make imap_session_get create
 998                    a new session, because of rfolder->session == NULL
 999                    it will not try to reconnect again and so avoid an
1000                    endless loop */
1001                 debug_print("getting session...\n");
1002                 session = imap_session_get(folder);
1003                 rfolder->session = SESSION(session);
1004                 statusbar_pop_all();
1005         }
1006         return session;
1007 }
1008
1009 static IMAPSession *imap_session_get(Folder *folder)
1010 {
1011         RemoteFolder *rfolder = REMOTE_FOLDER(folder);
1012         IMAPSession *session = NULL;
1013         gint r = MAILIMAP_NO_ERROR;
1014
1015         g_return_val_if_fail(folder != NULL, NULL);
1016         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, NULL);
1017         g_return_val_if_fail(folder->account != NULL, NULL);
1018
1019         if (prefs_common.work_offline &&
1020             !inc_offline_should_override(FALSE,
1021                 _("Claws Mail needs network access in order "
1022                   "to access the IMAP server."))) {
1023                 return NULL;
1024         }
1025
1026         /* check for deferred destroy */
1027         if (rfolder->session != NULL) {
1028                 session = IMAP_SESSION(rfolder->session);
1029                 if (!session->busy && session->do_destroy) {
1030                         rfolder->session = NULL;
1031                         imap_safe_destroy(session);
1032                         session = NULL;
1033                 }
1034         }
1035
1036         /* Make sure we have a session */
1037         if (rfolder->session != NULL && rfolder->session->state != SESSION_DISCONNECTED) {
1038                 session = IMAP_SESSION(rfolder->session);
1039         } else if (rfolder->session != NULL && rfolder->session->state == SESSION_DISCONNECTED) {
1040                 imap_safe_destroy(IMAP_SESSION(rfolder->session));
1041                 rfolder->session = NULL;
1042                 goto new_conn;
1043         } else if (rfolder->connecting) {
1044                 debug_print("already connecting\n");
1045                 return NULL;
1046         } else {
1047 new_conn:
1048                 imap_reset_uid_lists(folder);
1049                 if (time(NULL) - rfolder->last_failure <= 2)
1050                         return NULL;
1051                 rfolder->connecting = TRUE;
1052                 session = imap_session_new(folder, folder->account);
1053         }
1054         if(session == NULL) {
1055                 rfolder->last_failure = time(NULL);
1056                 rfolder->connecting = FALSE;
1057                 return NULL;
1058         }
1059
1060         /* Make sure session is authenticated */
1061         if (!IMAP_SESSION(session)->authenticated)
1062                 r = imap_session_authenticate(IMAP_SESSION(session), folder->account);
1063
1064         if (r != MAILIMAP_NO_ERROR || (!is_fatal(r) && !IMAP_SESSION(session)->authenticated)) {
1065                 rfolder->session = NULL;
1066                 if (!is_fatal(r)) {
1067                         imap_threaded_disconnect(session->folder);
1068                 }
1069                 SESSION(session)->state = SESSION_DISCONNECTED;
1070                 SESSION(session)->sock = NULL;
1071                 imap_safe_destroy(session);
1072                 rfolder->last_failure = time(NULL);
1073                 rfolder->connecting = FALSE;
1074                 return NULL;
1075         }
1076
1077         /* I think the point of this code is to avoid sending a
1078          * keepalive if we've used the session recently and therefore
1079          * think it's still alive.  Unfortunately, most of the code
1080          * does not yet check for errors on the socket, and so if the
1081          * connection drops we don't notice until the timeout expires.
1082          * A better solution than sending a NOOP every time would be
1083          * for every command to be prepared to retry until it is
1084          * successfully sent. -- mbp */
1085         if ((time(NULL) - SESSION(session)->last_access_time > SESSION_TIMEOUT_INTERVAL) || session->cancelled) {
1086                 /* verify that the session is still alive */
1087                 r = imap_cmd_noop(session);
1088
1089                 if (r != MAILIMAP_NO_ERROR) {
1090                         debug_print("disconnected!\n");
1091                         if (!is_fatal(r))
1092                                 session = imap_reconnect_if_possible(folder, session);
1093                         else {
1094                                 rfolder->session = NULL;
1095                                 rfolder->connecting = FALSE;
1096                                 SESSION(session)->state = SESSION_DISCONNECTED;
1097                                 SESSION(session)->sock = NULL;
1098                                 imap_safe_destroy(session);
1099                                 session = imap_session_get(folder);
1100                         }
1101                 }
1102                 if (session)
1103                         session->cancelled = FALSE;
1104         }
1105
1106         rfolder->session = SESSION(session);
1107         rfolder->connecting = FALSE;
1108
1109         return IMAP_SESSION(session);
1110 }
1111
1112 static IMAPSession *imap_session_new(Folder * folder,
1113                                      const PrefsAccount *account)
1114 {
1115         IMAPSession *session;
1116         gushort port;
1117         int r;
1118         int authenticated = FALSE;
1119         gchar *buf;
1120
1121 #ifdef USE_GNUTLS
1122         /* FIXME: IMAP over SSL only... */
1123         SSLType ssl_type;
1124
1125         port = account->set_imapport ? account->imapport
1126                 : account->ssl_imap == SSL_TUNNEL ? IMAPS_PORT : IMAP4_PORT;
1127         ssl_type = account->ssl_imap;
1128 #else
1129         if (account->ssl_imap != SSL_NONE) {
1130                 if (alertpanel_full(_("Insecure connection"),
1131                         _("This connection is configured to be secured "
1132                           "using SSL, but SSL is not available in this "
1133                           "build of Claws Mail. \n\n"
1134                           "Do you want to continue connecting to this "
1135                           "server? The communication would not be "
1136                           "secure."),
1137                           GTK_STOCK_CANCEL, _("Con_tinue connecting"),
1138                           NULL, FALSE, NULL, ALERT_WARNING,
1139                           G_ALERTDEFAULT) != G_ALERTALTERNATE)
1140                         return NULL;
1141         }
1142         port = account->set_imapport ? account->imapport
1143                 : IMAP4_PORT;
1144 #endif
1145
1146         imap_init(folder);
1147         buf = g_strdup_printf(_("Account '%s': Connecting to IMAP4 server: %s:%d..."),
1148                                 folder->account->account_name, folder->account->recv_server,
1149                                 port);
1150         statuswindow_print_all("%s", buf);
1151         log_message(LOG_PROTOCOL, "%s\n", buf);
1152         g_free(buf);
1153
1154 #ifndef G_OS_WIN32
1155         if (account->set_tunnelcmd) {
1156                 r = imap_threaded_connect_cmd(folder,
1157                                               account->tunnelcmd,
1158                                               account->recv_server,
1159                                               port);
1160         }
1161         else
1162 #endif
1163         {
1164 #ifdef USE_GNUTLS
1165                 if (ssl_type == SSL_TUNNEL) {
1166                         r = imap_threaded_connect_ssl(folder,
1167                                                       account->recv_server,
1168                                                       port);
1169                 }
1170                 else
1171 #endif
1172                 {
1173                         r = imap_threaded_connect(folder,
1174                                                   account->recv_server,
1175                                                   port);
1176                 }
1177         }
1178
1179         statuswindow_pop_all();
1180         if (r == MAILIMAP_NO_ERROR_AUTHENTICATED) {
1181                 authenticated = TRUE;
1182         }
1183         else if (r == MAILIMAP_NO_ERROR_NON_AUTHENTICATED) {
1184                 authenticated = FALSE;
1185         }
1186         else {
1187 #ifdef USE_GNUTLS
1188                 if (r == MAILIMAP_ERROR_SSL)
1189                         log_error(LOG_PROTOCOL, _("SSL handshake failed\n"));
1190                 else
1191 #endif
1192                         imap_handle_error(NULL, account->recv_server, r);
1193
1194                 if(!prefs_common.no_recv_err_panel) {
1195                         alertpanel_error_log(_("Can't connect to IMAP4 server: %s:%d"),
1196                                          account->recv_server, port);
1197                 } else {
1198                         log_error(LOG_PROTOCOL, _("Can't connect to IMAP4 server: %s:%d\n"),
1199                                          account->recv_server, port);
1200                 }
1201
1202                 return NULL;
1203         }
1204
1205         session = g_new0(IMAPSession, 1);
1206         session_init(SESSION(session), account, FALSE);
1207         SESSION(session)->type             = SESSION_IMAP;
1208         SESSION(session)->server           = g_strdup(account->recv_server);
1209         SESSION(session)->port             = port;
1210         SESSION(session)->sock             = NULL;
1211
1212         SESSION(session)->destroy          = imap_session_destroy;
1213
1214         session->capability = NULL;
1215
1216         session->authenticated = authenticated;
1217         session->mbox = NULL;
1218         session->exists = 0;
1219         session->recent = 0;
1220         session->expunge = 0;
1221         session->cmd_count = 0;
1222         session->folder = folder;
1223         IMAP_FOLDER(session->folder)->last_seen_separator = 0;
1224
1225 #ifdef USE_GNUTLS
1226         if (account->ssl_imap == SSL_STARTTLS) {
1227                 gint ok;
1228
1229                 ok = imap_cmd_starttls(session);
1230                 if (ok != MAILIMAP_NO_ERROR) {
1231                         log_warning(LOG_PROTOCOL, _("Can't start TLS session.\n"));
1232                         if (!is_fatal(ok)) {
1233                                 SESSION(session)->sock = NULL;
1234                                 imap_safe_destroy(session);
1235                         }
1236                         return NULL;
1237                 }
1238
1239                 imap_free_capabilities(session);
1240                 session->authenticated = FALSE;
1241                 session->uidplus = FALSE;
1242                 session->cmd_count = 1;
1243         }
1244 #endif
1245         log_message(LOG_PROTOCOL, "IMAP connection is %s-authenticated\n",
1246                     (session->authenticated) ? "pre" : "un");
1247
1248         session_register_ping(SESSION(session), imap_ping);
1249
1250         return session;
1251 }
1252
1253 static gint imap_session_authenticate(IMAPSession *session,
1254                                       PrefsAccount *account)
1255 {
1256         gchar *pass, *acc_pass;
1257         gboolean failed = FALSE;
1258         gint ok = MAILIMAP_NO_ERROR;
1259         g_return_val_if_fail(account->userid != NULL, MAILIMAP_ERROR_BAD_STATE);
1260
1261         if (password_get(account->userid, account->recv_server, "imap",
1262                          SESSION(session)->port, &pass)) {
1263                 Xstrdup_a(acc_pass, pass, {g_free(pass); return MAILIMAP_NO_ERROR;});
1264                 g_free(pass);
1265         } else {
1266                 acc_pass = account->passwd;
1267         }
1268 try_again:
1269         pass = acc_pass;
1270         if (!pass && account->imap_auth_type != IMAP_AUTH_ANON && account->imap_auth_type != IMAP_AUTH_GSSAPI) {
1271                 gchar *tmp_pass;
1272                 tmp_pass = input_dialog_query_password_keep(account->recv_server,
1273                                                             account->userid,
1274                                                             &(account->session_passwd));
1275                 if (!tmp_pass)
1276                         return MAILIMAP_NO_ERROR;
1277                 Xstrdup_a(pass, tmp_pass, {g_free(tmp_pass); return MAILIMAP_NO_ERROR;});
1278                 g_free(tmp_pass);
1279         } else if (account->imap_auth_type == IMAP_AUTH_ANON || account->imap_auth_type == IMAP_AUTH_GSSAPI) {
1280                 pass = "";
1281         }
1282         if ((ok = imap_auth(session, account->userid, pass, account->imap_auth_type)) != MAILIMAP_NO_ERROR) {
1283
1284                 if (!failed && !is_fatal(ok)) {
1285                         acc_pass = NULL;
1286                         failed = TRUE;
1287                         if (account->session_passwd != NULL) {
1288                                 g_free(account->session_passwd);
1289                                 account->session_passwd = NULL;
1290                         }
1291                         goto try_again;
1292                 } else {
1293                         if (prefs_common.no_recv_err_panel) {
1294                                 log_error(LOG_PROTOCOL, _("Couldn't login to IMAP server %s.\n"), account->recv_server);
1295                                 mainwindow_show_error();
1296                         } else
1297                                 alertpanel_error_log(_("Couldn't login to IMAP server %s."), account->recv_server);
1298                 }
1299
1300                 return ok;
1301         }
1302
1303         statuswindow_pop_all();
1304         session->authenticated = TRUE;
1305         return MAILIMAP_NO_ERROR;
1306 }
1307
1308 static void imap_session_destroy(Session *session)
1309 {
1310         if (session->state != SESSION_DISCONNECTED)
1311                 imap_threaded_disconnect(IMAP_SESSION(session)->folder);
1312
1313         imap_free_capabilities(IMAP_SESSION(session));
1314         g_free(IMAP_SESSION(session)->mbox);
1315 }
1316
1317 static gchar *imap_fetch_msg(Folder *folder, FolderItem *item, gint uid)
1318 {
1319         return imap_fetch_msg_full(folder, item, uid, TRUE, TRUE);
1320 }
1321
1322 static guint get_file_size_with_crs(const gchar *filename)
1323 {
1324         FILE *fp = NULL;
1325         guint cnt = 0;
1326         gchar buf[4096];
1327
1328         if (filename == NULL)
1329                 return -1;
1330
1331         fp = g_fopen(filename, "rb");
1332         if (!fp)
1333                 return -1;
1334
1335         while (fgets(buf, sizeof (buf), fp) != NULL) {
1336                 cnt += strlen(buf);
1337                 if (!strstr(buf, "\r\n") && strstr(buf, "\n"))
1338                         cnt++;
1339         }
1340
1341         fclose(fp);
1342         return cnt;
1343 }
1344
1345 static gchar *imap_get_cached_filename(FolderItem *item, guint msgnum)
1346 {
1347         gchar *path, *filename;
1348
1349         cm_return_val_if_fail(item != NULL, NULL);
1350
1351         path = folder_item_get_path(item);
1352
1353         if (!is_dir_exist(path)) {
1354                 g_free(path);
1355                 return NULL;
1356         }
1357
1358         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(msgnum), NULL);
1359
1360         if (is_dir_exist(filename)) {
1361                 g_free(filename);
1362                 filename = g_strconcat(path, G_DIR_SEPARATOR_S, ".", itos(msgnum), NULL);
1363         }
1364         g_free(path);
1365
1366         return filename;
1367 }
1368
1369 static void imap_remove_cached_msg(Folder *folder, FolderItem *item, MsgInfo *msginfo)
1370 {
1371         gchar *filename;
1372
1373         filename = imap_get_cached_filename(item, msginfo->msgnum);
1374
1375         cm_return_if_fail(filename != NULL);
1376
1377         if (is_file_exist(filename)) {
1378                 claws_unlink(filename);
1379         }
1380         g_free(filename);
1381 }
1382
1383 typedef struct _TagsData {
1384         gchar *str;
1385         GSList *msglist;
1386         IMAPFolderItem *item;
1387 } TagsData;
1388
1389 static void imap_commit_tags(FolderItem *item, MsgInfo *msginfo, GSList *tags_set, GSList *tags_unset)
1390 {
1391         IMAPSession *session;
1392         gint ok, can_create_tags;
1393         Folder *folder = NULL;
1394         TagsData *ht_data = NULL;
1395         GSList *cur;
1396
1397         g_return_if_fail(item != NULL);
1398         g_return_if_fail(msginfo != NULL);
1399
1400         folder = item->folder;
1401         debug_print("getting session...\n");
1402         session = imap_session_get(folder);
1403
1404         if (!session) {
1405                 debug_print("can't get session\n");
1406                 return;
1407         }
1408
1409         ok = imap_select(session, IMAP_FOLDER(folder), item,
1410                          NULL, NULL, NULL, NULL, &can_create_tags, FALSE);
1411
1412         if (ok != MAILIMAP_NO_ERROR) {
1413                 return;
1414         }
1415
1416
1417         if (IMAP_FOLDER_ITEM(item)->can_create_flags != ITEM_CAN_CREATE_FLAGS)
1418                 return;
1419
1420         if (IMAP_FOLDER_ITEM(item)->batching) {
1421                 /* instead of performing an UID STORE command for each message change,
1422                  * as a lot of them can change "together", we just fill in hashtables
1423                  * and defer the treatment so that we're able to send only one
1424                  * command.
1425                  */
1426                 debug_print("IMAP batch mode on, deferring tags change\n");
1427                 for (cur = tags_set; cur; cur = cur->next) {
1428                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1429                         if (cur_tag) {
1430                                 ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->tags_set_table,
1431                                         GINT_TO_POINTER(cur_tag));
1432                                 if (ht_data == NULL) {
1433                                         ht_data = g_new0(TagsData, 1);
1434                                         ht_data->str = g_strdup(tags_get_tag(cur_tag));
1435                                         ht_data->item = IMAP_FOLDER_ITEM(item);
1436                                         g_hash_table_insert(IMAP_FOLDER_ITEM(item)->tags_set_table,
1437                                                 GINT_TO_POINTER(cur_tag), ht_data);
1438                                 }
1439                                 ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
1440                         }
1441                 }
1442                 for (cur = tags_unset; cur; cur = cur->next) {
1443                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1444                         if (cur_tag) {
1445                                 ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->tags_unset_table,
1446                                         GINT_TO_POINTER(cur_tag));
1447                                 if (ht_data == NULL) {
1448                                         ht_data = g_new0(TagsData, 1);
1449                                         ht_data->str = g_strdup(tags_get_tag(cur_tag));
1450                                         ht_data->item = IMAP_FOLDER_ITEM(item);
1451                                         g_hash_table_insert(IMAP_FOLDER_ITEM(item)->tags_unset_table,
1452                                                 GINT_TO_POINTER(cur_tag), ht_data);
1453                                 }
1454                                 ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
1455                         }
1456                 }
1457         } else {
1458                 GSList *list_set = NULL;
1459                 GSList *list_unset = NULL;
1460                 GSList numlist;
1461
1462                 numlist.data = GINT_TO_POINTER(msginfo->msgnum);
1463                 numlist.next = NULL;
1464
1465                 debug_print("IMAP changing tags NOW\n");
1466                 for (cur = tags_set; cur; cur = cur->next) {
1467                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1468                         const gchar *str = tags_get_tag(cur_tag);
1469                         if (IS_NOT_RESERVED_TAG(str))
1470                                 list_set = g_slist_prepend(list_set, g_strdup(str));
1471                 }
1472                 if (list_set) {
1473                         ok = imap_set_message_flags(session,
1474                                 IMAP_FOLDER_ITEM(item), &numlist, 0, list_set, TRUE);
1475                         slist_free_strings_full(list_set);
1476                         if (ok != MAILIMAP_NO_ERROR) {
1477                                 return;
1478                         }
1479                 }
1480
1481                 for (cur = tags_unset; cur; cur = cur->next) {
1482                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1483                         const gchar *str = tags_get_tag(cur_tag);
1484                         if (IS_NOT_RESERVED_TAG(str))
1485                                 list_unset = g_slist_prepend(list_unset, g_strdup(str));
1486                 }
1487                 if (list_unset) {
1488                         ok = imap_set_message_flags(session,
1489                                 IMAP_FOLDER_ITEM(item), &numlist, 0, list_unset, FALSE);
1490                         slist_free_strings_full(list_unset);
1491                         if (ok != MAILIMAP_NO_ERROR) {
1492                                 return;
1493                         }
1494                 }
1495         }
1496 }
1497
1498 static gchar *imap_fetch_msg_full(Folder *folder, FolderItem *item, gint uid,
1499                                   gboolean headers, gboolean body)
1500 {
1501         gchar *path, *filename;
1502         IMAPSession *session;
1503         gint ok;
1504
1505         g_return_val_if_fail(folder != NULL, NULL);
1506         g_return_val_if_fail(item != NULL, NULL);
1507
1508         if (uid == 0)
1509                 return NULL;
1510
1511         path = folder_item_get_path(item);
1512         if (!is_dir_exist(path)) {
1513                 if(is_file_exist(path))
1514                         claws_unlink(path);
1515                 make_dir_hier(path);
1516         }
1517         g_free(path);
1518
1519         filename = imap_get_cached_filename(item, uid);
1520         debug_print("trying to fetch cached %s\n", filename);
1521
1522         if (is_file_exist(filename)) {
1523                 /* see whether the local file represents the whole message
1524                  * or not. As the IMAP server reports size with \r chars,
1525                  * we have to update the local file (UNIX \n only) size */
1526                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1527                 guint have_size = -1;
1528
1529                 if (cached)
1530                         debug_print("message %d has been already %scached.\n", uid,
1531                                 MSG_IS_FULLY_CACHED(cached->flags) ? "fully ":"");
1532
1533                 if (!cached || !MSG_IS_FULLY_CACHED(cached->flags)) {
1534                         have_size = get_file_size_with_crs(filename);
1535                         if (cached && (cached->size <= have_size || !body)) {
1536                                 ok = file_strip_crs(filename);
1537                                 if (ok == 0 && cached && cached->size <= have_size) {
1538                                         /* we have it all and stripped */
1539                                         debug_print("...fully cached in fact (%u/%zd); setting flag.\n",
1540                                                         have_size, cached->size);
1541                                         procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1542                                 }
1543                                 procmsg_msginfo_free(cached);
1544                                 return filename;
1545                         } else if (!cached && time(NULL) - get_file_mtime(filename) < 60) {
1546                                 debug_print("message not cached and file recent, considering file complete\n");
1547                                 ok = file_strip_crs(filename);
1548                                 if (ok == 0)
1549                                         return filename;
1550                         } else {
1551                                 procmsg_msginfo_free(cached);
1552                         }
1553                 }
1554                 if (cached && MSG_IS_FULLY_CACHED(cached->flags)) {
1555                         procmsg_msginfo_free(cached);
1556                         return filename;
1557                 }
1558         } else {
1559                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1560                 if (cached) {
1561                         procmsg_msginfo_unset_flags(cached, MSG_FULLY_CACHED, 0);
1562                         procmsg_msginfo_free(cached);
1563                 }
1564         }
1565
1566         debug_print("getting session...\n");
1567         session = imap_session_get(folder);
1568
1569         if (!session) {
1570                 g_free(filename);
1571                 return NULL;
1572         }
1573         session_set_access_time(SESSION(session));
1574         lock_session(session); /* unlocked later in the function */
1575
1576         debug_print("IMAP fetching messages\n");
1577         ok = imap_select(session, IMAP_FOLDER(folder), item,
1578                          NULL, NULL, NULL, NULL, NULL, FALSE);
1579         if (ok != MAILIMAP_NO_ERROR) {
1580                 g_warning("can't select mailbox %s\n", item->path);
1581                 g_free(filename);
1582                 return NULL;
1583         }
1584
1585         session_set_access_time(SESSION(session));
1586
1587         debug_print("getting message %d...\n", uid);
1588         ok = imap_cmd_fetch(session, (guint32)uid, filename, headers, body);
1589
1590         if (ok != MAILIMAP_NO_ERROR) {
1591                 g_warning("can't fetch message %d\n", uid);
1592                 g_free(filename);
1593                 return NULL;
1594         }
1595
1596         session_set_access_time(SESSION(session));
1597         unlock_session(session);
1598
1599         ok = file_strip_crs(filename);
1600
1601         if (ok == 0 && headers && body) {
1602                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1603                 if (cached) {
1604                         procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1605                         procmsg_msginfo_free(cached);
1606                 }
1607         } else if (ok == -1) {
1608                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1609                 if (cached) {
1610                         procmsg_msginfo_unset_flags(cached, MSG_FULLY_CACHED, 0);
1611                         procmsg_msginfo_free(cached);
1612                 }
1613         }
1614         return filename;
1615 }
1616
1617 static gboolean imap_is_msg_fully_cached(Folder *folder, FolderItem *item, gint uid)
1618 {
1619         gchar *filename;
1620         guint size = 0;
1621         MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1622
1623         if (!cached)
1624                 return FALSE;
1625
1626         if (MSG_IS_FULLY_CACHED(cached->flags)) {
1627                 procmsg_msginfo_free(cached);
1628                 return TRUE;
1629         }
1630
1631         filename = imap_get_cached_filename(item, uid);
1632
1633         if (is_file_exist(filename)) {
1634                 if (cached && cached->total_size == cached->size) {
1635                         /* fast path */
1636                         g_free(filename);
1637                         procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1638                         return TRUE;
1639                 }
1640                 size = get_file_size_with_crs(filename);
1641         }
1642         g_free(filename);
1643         debug_print("msg %d cached, has size %d, full should be %zd.\n", uid, size, cached->size);
1644         if (cached && size >= cached->size) {
1645                 cached->total_size = cached->size;
1646                 procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1647                 procmsg_msginfo_free(cached);
1648                 return TRUE;
1649         }
1650         if (cached)
1651                 procmsg_msginfo_free(cached);
1652         return FALSE;
1653 }
1654
1655 void imap_cache_msg(FolderItem *item, gint msgnum)
1656 {
1657         Folder *folder = NULL;
1658
1659         if (!item)
1660                 return;
1661         folder = item->folder;
1662
1663         if (!imap_is_msg_fully_cached(folder, item, msgnum)) {
1664                 gchar *tmp = imap_fetch_msg_full(folder, item, msgnum, TRUE, TRUE);
1665                 debug_print("fetched %s\n", tmp);
1666                 g_free(tmp);
1667         }
1668 }
1669
1670 static gint imap_add_msg(Folder *folder, FolderItem *dest,
1671                          const gchar *file, MsgFlags *flags)
1672 {
1673         gint ret;
1674         GSList file_list;
1675         MsgFileInfo fileinfo;
1676
1677         g_return_val_if_fail(file != NULL, -1);
1678
1679         fileinfo.msginfo = NULL;
1680         fileinfo.file = (gchar *)file;
1681         fileinfo.flags = flags;
1682         file_list.data = &fileinfo;
1683         file_list.next = NULL;
1684
1685         ret = imap_add_msgs(folder, dest, &file_list, NULL);
1686         return ret;
1687 }
1688
1689 static gint imap_add_msgs(Folder *folder, FolderItem *dest, GSList *file_list,
1690                    GHashTable *relation)
1691 {
1692         gchar *destdir;
1693         IMAPSession *session;
1694         guint32 last_uid = 0;
1695         GSList *cur;
1696         MsgFileInfo *fileinfo;
1697         gint ok = MAILIMAP_NO_ERROR;
1698         gint curnum = 0, total = 0;
1699         gboolean missing_uids = FALSE;
1700
1701         g_return_val_if_fail(folder != NULL, -1);
1702         g_return_val_if_fail(dest != NULL, -1);
1703         g_return_val_if_fail(file_list != NULL, -1);
1704
1705         debug_print("getting session...\n");
1706         session = imap_session_get(folder);
1707         if (!session) {
1708                 return -1;
1709         }
1710         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
1711         if (is_fatal(ok)) {
1712                 g_free(destdir);
1713                 return -1;
1714         }
1715         statusbar_print_all(_("Adding messages..."));
1716         total = g_slist_length(file_list);
1717         for (cur = file_list; cur != NULL; cur = cur->next) {
1718                 IMAPFlags iflags = 0;
1719                 guint32 new_uid = 0;
1720                 gchar *real_file = NULL;
1721                 fileinfo = (MsgFileInfo *)cur->data;
1722
1723                 statusbar_progress_all(curnum, total, total < 10 ? 1:10);
1724                 curnum++;
1725
1726                 if (fileinfo->flags) {
1727                         if (MSG_IS_MARKED(*fileinfo->flags))
1728                                 iflags |= IMAP_FLAG_FLAGGED;
1729                         if (MSG_IS_REPLIED(*fileinfo->flags))
1730                                 iflags |= IMAP_FLAG_ANSWERED;
1731                         if (MSG_IS_FORWARDED(*fileinfo->flags))
1732                                 iflags |= IMAP_FLAG_FORWARDED;
1733                         if (MSG_IS_SPAM(*fileinfo->flags))
1734                                 iflags |= IMAP_FLAG_SPAM;
1735                         else
1736                                 iflags |= IMAP_FLAG_HAM;
1737                         if (!MSG_IS_UNREAD(*fileinfo->flags))
1738                                 iflags |= IMAP_FLAG_SEEN;
1739
1740                 }
1741
1742                 if (real_file == NULL)
1743                         real_file = g_strdup(fileinfo->file);
1744
1745                 if (folder_has_parent_of_type(dest, F_QUEUE) ||
1746                     folder_has_parent_of_type(dest, F_OUTBOX) ||
1747                     folder_has_parent_of_type(dest, F_DRAFT) ||
1748                     folder_has_parent_of_type(dest, F_TRASH))
1749                         iflags |= IMAP_FLAG_SEEN;
1750
1751                 ok = imap_cmd_append(session, IMAP_FOLDER_ITEM(dest), destdir, real_file, iflags,
1752                                      &new_uid);
1753
1754                 if (ok != MAILIMAP_NO_ERROR) {
1755                         g_warning("can't append message %s\n", real_file);
1756                         g_free(real_file);
1757                         g_free(destdir);
1758                         statusbar_progress_all(0,0,0);
1759                         statusbar_pop_all();
1760                         return -1;
1761                 } else {
1762                         debug_print("appended new message as %d\n", new_uid);
1763                         /* put the local file in the imapcache, so that we don't
1764                          * have to fetch it back later. */
1765
1766                         if (new_uid == 0) {
1767                                 missing_uids = TRUE;
1768                                 debug_print("Missing UID (0)\n");
1769                         }
1770                         if (new_uid > 0) {
1771                                 gchar *cache_path = folder_item_get_path(dest);
1772                                 if (!is_dir_exist(cache_path))
1773                                         make_dir_hier(cache_path);
1774                                 if (is_dir_exist(cache_path)) {
1775                                         gchar *cache_file = g_strconcat(
1776                                                 cache_path, G_DIR_SEPARATOR_S,
1777                                                 itos(new_uid), NULL);
1778                                         copy_file(real_file, cache_file, TRUE);
1779                                         debug_print("got UID %d, copied to cache: %s\n", new_uid, cache_file);
1780                                         g_free(cache_file);
1781                                 }
1782                                 g_free(cache_path);
1783                         }
1784                 }
1785
1786                 if (relation != NULL)
1787                         g_hash_table_insert(relation, fileinfo->msginfo != NULL ?
1788                                           (gpointer) fileinfo->msginfo : (gpointer) fileinfo,
1789                                           GINT_TO_POINTER(new_uid));
1790                 if (last_uid < new_uid) {
1791                         last_uid = new_uid;
1792                 }
1793
1794                 g_free(real_file);
1795         }
1796
1797         statusbar_progress_all(0,0,0);
1798         statusbar_pop_all();
1799
1800
1801         g_free(destdir);
1802
1803         imap_scan_required(folder, dest);
1804
1805         session = imap_session_get(folder);
1806         if (!session) {
1807                 return -1;
1808         }
1809         if (missing_uids) {
1810                 gint a;
1811                 ok = imap_select(session, IMAP_FOLDER(folder), dest,
1812                          &a, NULL, NULL, NULL, NULL, FALSE);
1813         }
1814         return last_uid;
1815 }
1816
1817 static GSList *flatten_mailimap_set(struct mailimap_set * set)
1818 {
1819         GSList *result = NULL;
1820         clistiter *list;
1821         guint32 start, end, t;
1822         GSList *cur;
1823
1824         if (!set || !set->set_list)
1825                 return NULL;
1826
1827         for (list = clist_begin(set->set_list); list; list = clist_next(list)) {
1828                 struct mailimap_set_item *item = (struct mailimap_set_item *)clist_content(list);
1829                 start = item->set_first;
1830                 end = item->set_last;
1831                 if (start <= end) {
1832                         for (t = start; t <= end; t++) {
1833                                 result = g_slist_prepend(result, GINT_TO_POINTER(t));
1834                         }
1835                 }
1836         }
1837         result = g_slist_reverse(result);
1838         if (debug_get_mode()) {
1839                 debug_print("flat imap set: ");
1840                 for (cur = result; cur; cur = cur->next) {
1841                         debug_print("%d ", GPOINTER_TO_INT(cur->data));
1842                 }
1843                 debug_print("\n");
1844         }
1845
1846         return result;
1847 }
1848 static gint imap_do_copy_msgs(Folder *folder, FolderItem *dest,
1849                               MsgInfoList *msglist, GHashTable *relation,
1850                               gboolean same_dest_ok)
1851 {
1852         FolderItem *src;
1853         gchar *destdir;
1854         GSList *seq_list, *cur;
1855         MsgInfo *msginfo;
1856         IMAPSession *session;
1857         gint ok = MAILIMAP_NO_ERROR;
1858         GHashTable *uid_hash;
1859         gint last_num = 0;
1860
1861         g_return_val_if_fail(folder != NULL, -1);
1862         g_return_val_if_fail(dest != NULL, -1);
1863         g_return_val_if_fail(msglist != NULL, -1);
1864
1865         debug_print("getting session...\n");
1866         session = imap_session_get(folder);
1867
1868         if (!session) {
1869                 return -1;
1870         }
1871
1872         msginfo = (MsgInfo *)msglist->data;
1873         src = msginfo->folder;
1874         if (!same_dest_ok && src == dest) {
1875                 g_warning("the src folder is identical to the dest.\n");
1876                 return -1;
1877         }
1878
1879         if (src->folder != dest->folder) {
1880                 GSList *infolist = NULL, *cur;
1881                 int res = -1;
1882                 for (cur = msglist; cur; cur = cur->next) {
1883                         msginfo = (MsgInfo *)cur->data;
1884                         MsgFileInfo *fileinfo = g_new0(MsgFileInfo, 1);
1885                         fileinfo->file = procmsg_get_message_file(msginfo);
1886                         fileinfo->flags = &(msginfo->flags);
1887                         infolist = g_slist_prepend(infolist, fileinfo);
1888                 }
1889                 infolist = g_slist_reverse(infolist);
1890                 res = folder_item_add_msgs(dest, infolist, FALSE);
1891                 for (cur = infolist; cur; cur = cur->next) {
1892                         MsgFileInfo *info = (MsgFileInfo *)cur->data;
1893                         g_free(info->file);
1894                         g_free(info);
1895                 }
1896                 g_slist_free(infolist);
1897                 return res;
1898         }
1899
1900         lock_session(session); /* unlocked later in the function */
1901
1902         ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
1903                          NULL, NULL, NULL, NULL, NULL, FALSE);
1904         if (ok != MAILIMAP_NO_ERROR) {
1905                 return ok;
1906         }
1907
1908         unlock_session(session);
1909
1910         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
1911
1912         if (is_fatal(ok)) {
1913                 g_free(destdir);
1914                 return ok;
1915         }
1916
1917         seq_list = imap_get_lep_set_from_msglist(IMAP_FOLDER(folder), msglist);
1918         uid_hash = g_hash_table_new(g_direct_hash, g_direct_equal);
1919
1920         statusbar_print_all(_("Copying messages..."));
1921         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
1922                 struct mailimap_set * seq_set;
1923                 struct mailimap_set * source = NULL;
1924                 struct mailimap_set * dest = NULL;
1925                 seq_set = cur->data;
1926
1927                 debug_print("Copying messages from %s to %s ...\n",
1928                             src->path, destdir);
1929
1930                 lock_session(session); /* unlocked later in the function */
1931                 ok = imap_cmd_copy(session, seq_set, destdir,
1932                         &source, &dest);
1933
1934                 if (is_fatal(ok)) {
1935                         session = NULL;
1936                 }
1937
1938                 if (ok == MAILIMAP_NO_ERROR) {
1939                         unlock_session(session);
1940                         if (relation && source && dest) {
1941                                 GSList *s_list = flatten_mailimap_set(source);
1942                                 GSList *d_list = flatten_mailimap_set(dest);
1943                                 GSList *s_cur, *d_cur;
1944                                 if (g_slist_length(s_list) == g_slist_length(d_list)) {
1945
1946                                         for (s_cur = s_list, d_cur = d_list;
1947                                              s_cur && d_cur;
1948                                              s_cur = s_cur->next, d_cur = d_cur->next) {
1949                                                 g_hash_table_insert(uid_hash, s_cur->data, d_cur->data);
1950                                         }
1951
1952                                 } else {
1953                                         debug_print("hhhmm, source list length != dest list length.\n");
1954                                 }
1955                                 g_slist_free(s_list);
1956                                 g_slist_free(d_list);
1957                         }
1958                 }
1959
1960
1961                 if (source)
1962                         mailimap_set_free(source);
1963                 if (dest)
1964                         mailimap_set_free(dest);
1965
1966                 if (ok != MAILIMAP_NO_ERROR) {
1967                         g_hash_table_destroy(uid_hash);
1968                         imap_lep_set_free(seq_list);
1969                         statusbar_pop_all();
1970                         return -1;
1971                 }
1972         }
1973
1974         for (cur = msglist; cur != NULL; cur = g_slist_next(cur)) {
1975                 MsgInfo *msginfo = (MsgInfo *)cur->data;
1976                 gpointer hashval;
1977
1978                 hashval = g_hash_table_lookup(uid_hash, GINT_TO_POINTER(msginfo->msgnum));
1979
1980                 if (hashval != NULL) {
1981                         gint num = GPOINTER_TO_INT(hashval);
1982                         g_hash_table_insert(relation, msginfo,
1983                                           GINT_TO_POINTER(num));
1984                         if (num > last_num)
1985                                 last_num = num;
1986                         debug_print("copied message %d as %d\n", msginfo->msgnum, num);
1987                         /* put the local file in the imapcache, so that we don't
1988                          * have to fetch it back later. */
1989                         if (num > 0) {
1990                                 gchar *cache_path = folder_item_get_path(msginfo->folder);
1991                                 gchar *real_file = g_strconcat(
1992                                         cache_path, G_DIR_SEPARATOR_S,
1993                                         itos(msginfo->msgnum), NULL);
1994                                 gchar *cache_file = NULL;
1995                                 g_free(cache_path);
1996                                 cache_path = folder_item_get_path(dest);
1997                                 cache_file = g_strconcat(
1998                                         cache_path, G_DIR_SEPARATOR_S,
1999                                         itos(num), NULL);
2000                                 if (!is_dir_exist(cache_path))
2001                                         make_dir_hier(cache_path);
2002                                 if (is_file_exist(real_file) && is_dir_exist(cache_path)) {
2003                                         copy_file(real_file, cache_file, TRUE);
2004                                         debug_print("copied to cache: %s\n", cache_file);
2005                                 }
2006                                 g_free(real_file);
2007                                 g_free(cache_file);
2008                                 g_free(cache_path);
2009                         }
2010                 } else
2011                         g_hash_table_insert(relation, msginfo,
2012                                           GINT_TO_POINTER(0));
2013         }
2014         statusbar_pop_all();
2015
2016         g_hash_table_destroy(uid_hash);
2017         imap_lep_set_free(seq_list);
2018
2019         g_free(destdir);
2020
2021         IMAP_FOLDER_ITEM(dest)->lastuid = 0;
2022         IMAP_FOLDER_ITEM(dest)->uid_next = 0;
2023         g_slist_free(IMAP_FOLDER_ITEM(dest)->uid_list);
2024         IMAP_FOLDER_ITEM(dest)->uid_list = NULL;
2025
2026         imap_scan_required(folder, dest);
2027         if (ok == MAILIMAP_NO_ERROR)
2028                 return last_num;
2029         else
2030                 return -1;
2031 }
2032
2033 static gint imap_copy_msg(Folder *folder, FolderItem *dest, MsgInfo *msginfo)
2034 {
2035         GSList msglist;
2036
2037         g_return_val_if_fail(msginfo != NULL, -1);
2038
2039         msglist.data = msginfo;
2040         msglist.next = NULL;
2041
2042         return imap_copy_msgs(folder, dest, &msglist, NULL);
2043 }
2044
2045 static gint imap_copy_msgs(Folder *folder, FolderItem *dest,
2046                     MsgInfoList *msglist, GHashTable *relation)
2047 {
2048         MsgInfo *msginfo;
2049         gint ret;
2050
2051         g_return_val_if_fail(folder != NULL, -1);
2052         g_return_val_if_fail(dest != NULL, -1);
2053         g_return_val_if_fail(msglist != NULL, -1);
2054
2055         msginfo = (MsgInfo *)msglist->data;
2056         g_return_val_if_fail(msginfo->folder != NULL, -1);
2057
2058         ret = imap_do_copy_msgs(folder, dest, msglist, relation, FALSE);
2059         return ret;
2060 }
2061
2062 static gboolean imap_matcher_type_is_local(gint matchertype)
2063 {
2064         switch (matchertype) {
2065         case MATCHCRITERIA_FROM:
2066         case MATCHCRITERIA_TO:
2067         case MATCHCRITERIA_CC:
2068         case MATCHCRITERIA_TO_OR_CC:
2069         case MATCHCRITERIA_SUBJECT:
2070         case MATCHCRITERIA_REFERENCES:
2071         case MATCHCRITERIA_INREPLYTO:
2072         case MATCHCRITERIA_AGE_GREATER:
2073         case MATCHCRITERIA_AGE_LOWER:
2074         case MATCHCRITERIA_FORWARDED:
2075         case MATCHCRITERIA_SPAM:
2076         case MATCHCRITERIA_UNREAD:
2077         case MATCHCRITERIA_NEW:
2078         case MATCHCRITERIA_MARKED:
2079         case MATCHCRITERIA_REPLIED:
2080         case MATCHCRITERIA_DELETED:
2081         case MATCHCRITERIA_SIZE_GREATER:
2082         case MATCHCRITERIA_SIZE_SMALLER:
2083         case MATCHCRITERIA_SIZE_EQUAL:
2084                 return TRUE;
2085         }
2086         return FALSE;
2087 }
2088
2089 static IMAPSearchKey* search_make_key(MatcherProp* match, gboolean* is_all)
2090 {
2091         if (match->matchtype == MATCHTYPE_MATCHCASE || match->matchtype == MATCHTYPE_MATCH) {
2092                 IMAPSearchKey* result = NULL;
2093                 gboolean invert = FALSE;
2094                 gint matchertype = match->criteria;
2095
2096                 if (is_all) {
2097                         *is_all = FALSE;
2098                 }
2099
2100                 switch (matchertype) {
2101                 case MATCHCRITERIA_NOT_NEW: invert = TRUE; matchertype = MATCHCRITERIA_NEW; break;
2102                 case MATCHCRITERIA_NOT_MARKED: invert = TRUE; matchertype = MATCHCRITERIA_MARKED; break;
2103                 case MATCHCRITERIA_NOT_FORWARDED: invert = TRUE; matchertype = MATCHCRITERIA_FORWARDED; break;
2104                 case MATCHCRITERIA_NOT_SPAM: invert = TRUE; matchertype = MATCHCRITERIA_SPAM; break;
2105                 case MATCHCRITERIA_NOT_SUBJECT: invert = TRUE; matchertype = MATCHCRITERIA_SUBJECT; break;
2106                 case MATCHCRITERIA_NOT_FROM: invert = TRUE; matchertype = MATCHCRITERIA_FROM; break;
2107                 case MATCHCRITERIA_NOT_TO: invert = TRUE; matchertype = MATCHCRITERIA_TO; break;
2108                 case MATCHCRITERIA_NOT_CC: invert = TRUE; matchertype = MATCHCRITERIA_CC; break;
2109                 case MATCHCRITERIA_NOT_REFERENCES: invert = TRUE; matchertype = MATCHCRITERIA_REFERENCES; break;
2110                 case MATCHCRITERIA_NOT_HEADER: invert = TRUE; matchertype = MATCHCRITERIA_HEADER; break;
2111                 case MATCHCRITERIA_NOT_TAG: invert = TRUE; matchertype = MATCHCRITERIA_TAG; break;
2112                 case MATCHCRITERIA_NOT_HEADERS_PART: invert = TRUE; matchertype = MATCHCRITERIA_HEADERS_PART; break;
2113                 case MATCHCRITERIA_NOT_HEADERS_CONT: invert = TRUE; matchertype = MATCHCRITERIA_HEADERS_CONT; break;
2114                 case MATCHCRITERIA_NOT_MESSAGE: invert = TRUE; matchertype = MATCHCRITERIA_MESSAGE; break;
2115                 case MATCHCRITERIA_NOT_BODY_PART: invert = TRUE; matchertype = MATCHCRITERIA_BODY_PART; break;
2116                 case MATCHCRITERIA_NOT_TO_AND_NOT_CC: invert = TRUE; matchertype = MATCHCRITERIA_TO_OR_CC; break;
2117                 case MATCHCRITERIA_NOT_INREPLYTO: invert = TRUE; matchertype = MATCHCRITERIA_INREPLYTO; break;
2118                 }
2119
2120                 /*
2121                  * this aborts conversion even for predicates understood by the following code.
2122                  * while that might seem wasteful, claws local search for information listed below
2123                  * has proven faster than IMAP search plus network roundtrips. once this changes,
2124                  * consider removing these exceptions.
2125                  */
2126                 if (imap_matcher_type_is_local(matchertype))
2127                         return NULL;
2128
2129                 /* the Message-ID header is also cached */
2130                 if (matchertype == MATCHCRITERIA_HEADER && g_strcmp0("Message-ID", match->header) == 0) {
2131                         return NULL;
2132                 }
2133
2134                 switch (matchertype) {
2135                 case MATCHCRITERIA_FORWARDED:
2136                         result = imap_search_new(IMAP_SEARCH_CRITERIA_TAG, NULL, RTAG_FORWARDED, 0);
2137                         break;
2138
2139                 case MATCHCRITERIA_SPAM:
2140                         result = imap_search_new(IMAP_SEARCH_CRITERIA_TAG, NULL, RTAG_JUNK, 0);
2141                         break;
2142
2143                 case MATCHCRITERIA_INREPLYTO:
2144                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, "In-Reply-To", match->expr, 0);
2145                         break;
2146
2147                 case MATCHCRITERIA_REFERENCES:
2148                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, "References", match->expr, 0);
2149                         break;
2150
2151                 case MATCHCRITERIA_TO_OR_CC:
2152                         result = imap_search_or(
2153                                         imap_search_new(IMAP_SEARCH_CRITERIA_TO, NULL, match->expr, 0),
2154                                         imap_search_new(IMAP_SEARCH_CRITERIA_CC, NULL, match->expr, 0)
2155                                         );
2156                         break;
2157
2158                 case MATCHCRITERIA_HEADERS_PART:
2159                 case MATCHCRITERIA_HEADERS_CONT:
2160                         result = imap_search_and(
2161                                         imap_search_not(imap_search_new(IMAP_SEARCH_CRITERIA_BODY, NULL, match->expr, 0)),
2162                                         imap_search_new(IMAP_SEARCH_CRITERIA_MESSAGE, NULL, match->expr, 0)
2163                                         );
2164                         break;
2165
2166                 case MATCHCRITERIA_SIZE_EQUAL:
2167                         result = imap_search_and(
2168                                         imap_search_not(imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_SMALLER, NULL, NULL, match->value)),
2169                                         imap_search_not(imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_GREATER, NULL, NULL, match->value))
2170                                         );
2171                         break;
2172
2173                 case MATCHCRITERIA_NOT_UNREAD:
2174                         result = imap_search_new(IMAP_SEARCH_CRITERIA_READ, NULL, NULL, 0);
2175                         break;
2176
2177                 case MATCHCRITERIA_UNREAD:
2178                         result = imap_search_new(IMAP_SEARCH_CRITERIA_UNREAD, NULL, NULL, 0);
2179                         break;
2180
2181                 case MATCHCRITERIA_NEW:
2182                         result = imap_search_new(IMAP_SEARCH_CRITERIA_NEW, NULL, NULL, 0);
2183                         break;
2184
2185                 case MATCHCRITERIA_MARKED:
2186                         result = imap_search_new(IMAP_SEARCH_CRITERIA_MARKED, NULL, NULL, 0);
2187                         break;
2188
2189                 case MATCHCRITERIA_DELETED:
2190                         result = imap_search_new(IMAP_SEARCH_CRITERIA_DELETED, NULL, NULL, 0);
2191                         break;
2192
2193                 case MATCHCRITERIA_REPLIED:
2194                         result = imap_search_new(IMAP_SEARCH_CRITERIA_REPLIED, NULL, NULL, 0);
2195                         break;
2196
2197                 case MATCHCRITERIA_TAG:
2198                         {
2199                                 gchar *tmp = imap_utf8_to_modified_utf7(match->expr, TRUE);
2200                                 result = imap_search_new(IMAP_SEARCH_CRITERIA_TAG, NULL, tmp, 0);
2201                                 g_free(tmp);
2202                         }
2203                         break;
2204
2205                 case MATCHCRITERIA_SUBJECT:
2206                         result = imap_search_new(IMAP_SEARCH_CRITERIA_SUBJECT, NULL, match->expr, 0);
2207                         break;
2208
2209                 case MATCHCRITERIA_FROM:
2210                         result = imap_search_new(IMAP_SEARCH_CRITERIA_FROM, NULL, match->expr, 0);
2211                         break;
2212
2213                 case MATCHCRITERIA_TO:
2214                         result = imap_search_new(IMAP_SEARCH_CRITERIA_TO, NULL, match->expr, 0);
2215                         break;
2216
2217                 case MATCHCRITERIA_CC:
2218                         result = imap_search_new(IMAP_SEARCH_CRITERIA_CC, NULL, match->expr, 0);
2219                         break;
2220
2221                 case MATCHCRITERIA_AGE_GREATER:
2222                         result = imap_search_new(IMAP_SEARCH_CRITERIA_AGE_GREATER, NULL, NULL, match->value);
2223                         break;
2224
2225                 case MATCHCRITERIA_AGE_LOWER:
2226                         result = imap_search_new(IMAP_SEARCH_CRITERIA_AGE_LOWER, NULL, NULL, match->value);
2227                         break;
2228
2229                 case MATCHCRITERIA_BODY_PART:
2230                         result = imap_search_new(IMAP_SEARCH_CRITERIA_BODY, NULL, match->expr, 0);
2231                         break;
2232
2233                 case MATCHCRITERIA_MESSAGE:
2234                         result = imap_search_new(IMAP_SEARCH_CRITERIA_MESSAGE, NULL, match->expr, 0);
2235                         break;
2236
2237                 case MATCHCRITERIA_HEADER:
2238                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, match->header, match->expr, 0);
2239                         break;
2240
2241                 case MATCHCRITERIA_SIZE_GREATER:
2242                         result = imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_GREATER, NULL, NULL, match->value);
2243                         break;
2244
2245                 case MATCHCRITERIA_SIZE_SMALLER:
2246                         result = imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_SMALLER, NULL, NULL, match->value);
2247                         break;
2248
2249                 default:
2250                         result = imap_search_new(IMAP_SEARCH_CRITERIA_ALL, NULL, NULL, 0);
2251                         if (is_all) {
2252                                 *is_all = TRUE;
2253                         }
2254                         break;
2255                 }
2256
2257                 if (invert) {
2258                         result = imap_search_not(result);
2259                         if (is_all && *is_all) {
2260                                 *is_all = FALSE;
2261                         }
2262                 }
2263
2264                 return result;
2265         }
2266
2267         return NULL;
2268 }
2269
2270 static void imap_change_search_charset(IMAPFolder *folder)
2271 {
2272         /* If server supports charset in searches, but the last used one failed,
2273          * changed to the next preferred charset. If none are still available,
2274          * disable charset searches.
2275          * Charsets are tried in the following order:
2276          * UTF-8, locale's charset, UTF-7.
2277          */
2278
2279         if (folder->search_charset_supported) {
2280                 if (folder->search_charset && !strcmp(folder->search_charset, conv_get_locale_charset_str_no_utf8()))
2281                         folder->search_charset = "UTF-8";
2282                 else if (folder->search_charset && !strcmp(folder->search_charset, "UTF-8"))
2283                         folder->search_charset = "UTF-7";
2284                 else {
2285                         folder->search_charset = NULL;
2286                         folder->search_charset_supported = FALSE;
2287                 }
2288         }
2289 }
2290
2291 static MatcherProp *imap_matcher_prop_set_charset(IMAPFolder *folder,
2292                                                   MatcherProp *utf8_prop,
2293                                                   gchar **charset)
2294 {
2295         /* If the match is going to be done locally, or the criteria is on
2296          * tag (special-cased to modified-UTF-7), or the expression searched
2297          * is ASCII, don't bother converting.
2298          */
2299         if (imap_matcher_type_is_local(utf8_prop->criteria)
2300          || utf8_prop->criteria == MATCHCRITERIA_TAG
2301          || utf8_prop->criteria == MATCHCRITERIA_NOT_TAG
2302          || utf8_prop->expr == NULL
2303          || is_ascii_str(utf8_prop->expr))
2304                 return matcherprop_new(utf8_prop->criteria,
2305                                utf8_prop->header,
2306                                utf8_prop->matchtype,
2307                                utf8_prop->expr,
2308                                utf8_prop->value);
2309         else {
2310                 gchar *conv_expr = NULL;
2311
2312                 /* If the search is server-side and the server doesn't support
2313                  * searching with the charsets we handle, bail out.
2314                  */
2315                 if (folder->search_charset_supported == FALSE)
2316                         return NULL;
2317
2318                 /* Else, convert. */
2319                 if (*charset == NULL)
2320                         *charset = g_strdup(folder->search_charset);
2321
2322                 conv_expr = conv_codeset_strdup(utf8_prop->expr, CS_UTF_8, *charset);
2323
2324                 if (conv_expr == NULL)
2325                         conv_expr = g_strdup(utf8_prop->expr);
2326
2327                 return matcherprop_new(utf8_prop->criteria,
2328                                utf8_prop->header,
2329                                utf8_prop->matchtype,
2330                                conv_expr,
2331                                utf8_prop->value);
2332         }
2333 }
2334
2335 static gint     search_msgs             (Folder                 *folder,
2336                                          FolderItem             *container,
2337                                          MsgNumberList          **msgs,
2338                                          gboolean               *on_server,
2339                                          MatcherList            *predicate,
2340                                          SearchProgressNotify   progress_cb,
2341                                          gpointer               progress_data)
2342 {
2343         IMAPSearchKey* key = NULL;
2344         GSList* cur;
2345         int result = -1;
2346         clist* uidlist = NULL;
2347         gboolean server_filtering_useless = FALSE;
2348         IMAPSession *session;
2349         gchar *charset_to_use = NULL;
2350
2351         if (on_server == NULL || !*on_server) {
2352                 return folder_item_search_msgs_local(folder, container, msgs, on_server,
2353                                 predicate, progress_cb, progress_data);
2354         }
2355
2356         for (cur = predicate->matchers; cur != NULL; cur = cur->next) {
2357                 IMAPSearchKey* matcherPart = NULL;
2358                 MatcherProp* prop = (MatcherProp*) cur->data;
2359                 gboolean is_all;
2360                 MatcherProp *imap_prop = imap_matcher_prop_set_charset(IMAP_FOLDER(folder), prop, &charset_to_use);
2361
2362                 if (imap_prop == NULL) {
2363                         /* Couldn't convert matcherprop to IMAP - probably not ascii
2364                          * and server doesn't support the charsets we do. */
2365                          return -1;
2366                 }
2367
2368                 matcherPart = search_make_key(imap_prop, &is_all);
2369
2370                 matcherprop_free(imap_prop);
2371
2372                 if (on_server) {
2373                         *on_server &= matcherPart != NULL && prop->matchtype == MATCHTYPE_MATCHCASE;
2374                 }
2375
2376                 if (matcherPart) {
2377                         if (key == NULL) {
2378                                 key = matcherPart;
2379                                 server_filtering_useless = is_all;
2380                         } else if (predicate->bool_and) {
2381                                 key = imap_search_and(key, matcherPart);
2382                                 server_filtering_useless &= is_all;
2383                         } else {
2384                                 key = imap_search_or(key, matcherPart);
2385                                 server_filtering_useless |= is_all;
2386                         }
2387                 }
2388         }
2389
2390         if (server_filtering_useless) {
2391                 imap_search_free(key);
2392                 key = NULL;
2393         }
2394
2395         if (key == NULL && progress_cb != NULL) {
2396                 GSList* cur;
2397                 GSList* list;
2398                 int count = 0;
2399
2400                 progress_cb(progress_data, TRUE, 0, 0, container->total_msgs);
2401                 progress_cb(progress_data, TRUE, container->total_msgs, 0, container->total_msgs);
2402
2403                 list = folder_item_get_msg_list(container);
2404                 for (cur = list; cur != NULL; cur = cur->next) {
2405                         *msgs = g_slist_prepend(*msgs, GUINT_TO_POINTER(((MsgInfo*) cur->data)->msgnum));
2406                         count++;
2407                 }
2408                 procmsg_msg_list_free(list);
2409
2410                 *msgs = g_slist_reverse(*msgs);
2411
2412                 return count;
2413         }
2414
2415         session = imap_session_get(folder);
2416         if (!session) {
2417                 return -1;
2418         }
2419         result = imap_select(session, IMAP_FOLDER(folder), FOLDER_ITEM(container),
2420                          NULL, NULL, NULL, NULL, NULL, TRUE);
2421         if (result != MAILIMAP_NO_ERROR)
2422                 return -1;
2423
2424         if (progress_cb)
2425                 progress_cb(progress_data, TRUE, 0, 0, container->total_msgs);
2426         result = imap_threaded_search(folder, IMAP_SEARCH_TYPE_KEYED, key, charset_to_use, NULL, &uidlist);
2427         if (progress_cb)
2428                 progress_cb(progress_data, TRUE, container->total_msgs, 0, container->total_msgs);
2429
2430         if (result == MAILIMAP_NO_ERROR) {
2431                 gint result = 0;
2432
2433                 *msgs = imap_uid_list_from_lep(uidlist, &result);
2434
2435                 mailimap_search_result_free(uidlist);
2436
2437                 if (charset_to_use != NULL)
2438                         g_free(charset_to_use);
2439
2440                 return result;
2441         } else if (charset_to_use != NULL) {
2442                 /* If search failed and was on an 8-bit string, try the next
2443                  * available charset to search if there still are some.
2444                  */
2445                 g_free(charset_to_use);
2446
2447                 imap_change_search_charset(IMAP_FOLDER(folder));
2448                 if (IMAP_FOLDER(folder)->search_charset_supported)
2449                         return search_msgs(folder, container, msgs, on_server, predicate,
2450                                    progress_cb, progress_data);
2451                 else
2452                         return -1;
2453         } else {
2454                 return -1;
2455         }
2456 }
2457
2458
2459 static gint imap_do_remove_msgs(Folder *folder, FolderItem *dest,
2460                                 MsgInfoList *msglist, GHashTable *relation)
2461 {
2462         gchar *destdir, *dir;
2463         GSList *numlist = NULL, *cur;
2464         MsgInfo *msginfo;
2465         IMAPSession *session;
2466         gint ok = MAILIMAP_NO_ERROR;
2467
2468         g_return_val_if_fail(folder != NULL, -1);
2469         g_return_val_if_fail(dest != NULL, -1);
2470         g_return_val_if_fail(msglist != NULL, -1);
2471
2472         debug_print("getting session...\n");
2473         session = imap_session_get(folder);
2474         if (!session) {
2475                 return -1;
2476         }
2477
2478         lock_session(session); /* unlocked later in the function */
2479
2480         msginfo = (MsgInfo *)msglist->data;
2481
2482         ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
2483                          NULL, NULL, NULL, NULL, NULL, FALSE);
2484         if (ok != MAILIMAP_NO_ERROR) {
2485                 return ok;
2486         }
2487
2488         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
2489         if (is_fatal(ok)) {
2490                 g_free(destdir);
2491                 return ok;
2492         }
2493         for (cur = msglist; cur; cur = cur->next) {
2494                 msginfo = (MsgInfo *)cur->data;
2495                 if (!MSG_IS_DELETED(msginfo->flags))
2496                         numlist = g_slist_prepend(numlist, GINT_TO_POINTER(msginfo->msgnum));
2497         }
2498         numlist = g_slist_reverse(numlist);
2499
2500         if (numlist != NULL) {
2501                 ok = imap_set_message_flags
2502                         (session, IMAP_FOLDER_ITEM(msginfo->folder), numlist, IMAP_FLAG_DELETED, NULL, TRUE);
2503                 if (ok != MAILIMAP_NO_ERROR) {
2504                         log_warning(LOG_PROTOCOL, _("can't set deleted flags\n"));
2505                         g_free(destdir);
2506                         return ok;
2507                 }
2508         } /* else we just need to expunge */
2509         ok = imap_cmd_expunge(session, folder->account->imap_use_trash);
2510         if (ok != MAILIMAP_NO_ERROR) {
2511                 log_warning(LOG_PROTOCOL, _("can't expunge\n"));
2512                 g_free(destdir);
2513                 return ok;
2514         }
2515
2516         session->folder_content_changed = TRUE;
2517         unlock_session(session);
2518
2519         dir = folder_item_get_path(msginfo->folder);
2520         if (is_dir_exist(dir)) {
2521                 for (cur = msglist; cur; cur = cur->next) {
2522                         msginfo = (MsgInfo *)cur->data;
2523                         remove_numbered_files(dir, msginfo->msgnum, msginfo->msgnum);
2524                 }
2525         }
2526         g_free(dir);
2527
2528         g_slist_free(numlist);
2529
2530         imap_scan_required(folder, dest);
2531
2532         g_free(destdir);
2533
2534         return 0;
2535 }
2536
2537 static gint imap_remove_msgs(Folder *folder, FolderItem *dest,
2538                     MsgInfoList *msglist, GHashTable *relation)
2539 {
2540         MsgInfo *msginfo;
2541
2542         g_return_val_if_fail(folder != NULL, -1);
2543         g_return_val_if_fail(dest != NULL, -1);
2544         if (msglist == NULL)
2545                 return 0;
2546
2547         msginfo = (MsgInfo *)msglist->data;
2548         g_return_val_if_fail(msginfo->folder != NULL, -1);
2549
2550         return imap_do_remove_msgs(folder, dest, msglist, relation);
2551 }
2552
2553 static gint imap_remove_all_msg(Folder *folder, FolderItem *item)
2554 {
2555         GSList *list = folder_item_get_msg_list(item);
2556         gint res = imap_remove_msgs(folder, item, list, NULL);
2557         procmsg_msg_list_free(list);
2558         return res;
2559 }
2560
2561 static gboolean imap_is_msg_changed(Folder *folder, FolderItem *item,
2562                                     MsgInfo *msginfo)
2563 {
2564         /* TODO: properly implement this method */
2565         return FALSE;
2566 }
2567
2568 static gint imap_close(Folder *folder, FolderItem *item)
2569 {
2570         return 0;
2571 }
2572
2573 static gint imap_scan_tree_real(Folder *folder, gboolean subs_only)
2574 {
2575         FolderItem *item = NULL;
2576         IMAPSession *session;
2577         gchar *root_folder = NULL;
2578
2579         g_return_val_if_fail(folder != NULL, -1);
2580         g_return_val_if_fail(folder->account != NULL, -1);
2581
2582         debug_print("getting session...\n");
2583         session = imap_session_get(folder);
2584         if (!session) {
2585                 if (!folder->node) {
2586                         folder_tree_destroy(folder);
2587                         item = folder_item_new(folder, folder->name, NULL);
2588                         item->folder = folder;
2589                         folder->node = item->node = g_node_new(item);
2590                 }
2591                 return -1;
2592         }
2593
2594         if (folder->account->imap_dir && *folder->account->imap_dir) {
2595                 gchar *real_path;
2596                 int r = MAILIMAP_NO_ERROR;
2597                 clist * lep_list;
2598
2599                 Xstrdup_a(root_folder, folder->account->imap_dir, {return -1;});
2600                 extract_quote(root_folder, '"');
2601                 subst_char(root_folder,
2602                            imap_get_path_separator(session, IMAP_FOLDER(folder),
2603                                                    root_folder, &r),
2604                            '/');
2605                 if (is_fatal(r))
2606                         return -1;
2607                 strtailchomp(root_folder, '/');
2608                 real_path = imap_get_real_path
2609                         (session, IMAP_FOLDER(folder), root_folder, &r);
2610                 if (is_fatal(r)) {
2611                         g_free(real_path);
2612                         return -1;
2613                 }
2614                 debug_print("IMAP root directory: %s\n", real_path);
2615
2616                 /* check if root directory exist */
2617
2618                 r = imap_threaded_list(session->folder, "", real_path,
2619                                        &lep_list);
2620
2621                 if (r != MAILIMAP_NO_ERROR)
2622                         imap_handle_error(SESSION(session), NULL, r);
2623
2624                 if ((r != MAILIMAP_NO_ERROR) || (clist_count(lep_list) == 0)) {
2625                         if (!folder->node) {
2626                                 item = folder_item_new(folder, folder->name, NULL);
2627                                 item->folder = folder;
2628                                 folder->node = item->node = g_node_new(item);
2629                         }
2630                         return -1;
2631                 }
2632                 mailimap_list_result_free(lep_list);
2633
2634                 g_free(real_path);
2635         }
2636
2637         if (folder->node)
2638                 item = FOLDER_ITEM(folder->node->data);
2639
2640         if (item && !item->path && root_folder) {
2641                 item->path = g_strdup(root_folder);
2642         }
2643
2644         if (!item || ((item->path || root_folder) &&
2645                       strcmp2(item->path, root_folder) != 0)) {
2646                 folder_tree_destroy(folder);
2647                 item = folder_item_new(folder, folder->name, root_folder);
2648                 item->folder = folder;
2649                 folder->node = item->node = g_node_new(item);
2650         }
2651
2652         imap_scan_tree_recursive(session, FOLDER_ITEM(folder->node->data), subs_only);
2653         imap_create_missing_folders(folder);
2654
2655         return 0;
2656 }
2657
2658 static gint imap_scan_tree(Folder *folder)
2659 {
2660         gboolean subs_only = FALSE;
2661         if (folder->account) {
2662                 debug_print(" scanning only subs %d\n", folder->account->imap_subsonly);
2663                 subs_only = folder->account->imap_subsonly;
2664         }
2665         return imap_scan_tree_real(folder, subs_only);
2666 }
2667
2668 static gint imap_scan_tree_recursive(IMAPSession *session, FolderItem *item, gboolean subs_only)
2669 {
2670         Folder *folder;
2671         IMAPFolder *imapfolder;
2672         FolderItem *new_item;
2673         GSList *item_list, *cur;
2674         GNode *node;
2675         gchar *real_path;
2676         gchar *wildcard_path;
2677         gchar separator;
2678         gchar wildcard[3];
2679         clist * lep_list;
2680         int r = MAILIMAP_NO_ERROR;
2681
2682         g_return_val_if_fail(item != NULL, -1);
2683         g_return_val_if_fail(item->folder != NULL, -1);
2684         g_return_val_if_fail(item->no_sub == FALSE, -1);
2685
2686         folder = item->folder;
2687         imapfolder = IMAP_FOLDER(folder);
2688
2689         separator = imap_get_path_separator(session, imapfolder, item->path, &r);
2690         if (is_fatal(r))
2691                 return r;
2692
2693         if (folder->ui_func)
2694                 folder->ui_func(folder, item, folder->ui_func_data);
2695
2696         if (item->path) {
2697                 wildcard[0] = separator;
2698                 wildcard[1] = '%';
2699                 wildcard[2] = '\0';
2700                 real_path = imap_get_real_path(session, imapfolder, item->path, &r);
2701                 if (is_fatal(r)) {
2702                         g_free(real_path);
2703                         return r;
2704                 }
2705         } else {
2706                 wildcard[0] = '%';
2707                 wildcard[1] = '\0';
2708                 real_path = g_strdup("");
2709         }
2710
2711         Xstrcat_a(wildcard_path, real_path, wildcard,
2712                   {g_free(real_path); return MAILIMAP_ERROR_BAD_STATE;});
2713         lep_list = NULL;
2714
2715         if (subs_only)
2716                 r = imap_threaded_lsub(folder, "", wildcard_path, &lep_list);
2717         else
2718                 r = imap_threaded_list(folder, "", wildcard_path, &lep_list);
2719
2720         if (r != MAILIMAP_NO_ERROR) {
2721                 imap_handle_error(SESSION(session), NULL, r);
2722                 item_list = NULL;
2723                 g_free(real_path);
2724                 return r;
2725         }
2726         else {
2727                 item_list = imap_list_from_lep(imapfolder,
2728                                                lep_list, real_path, FALSE);
2729                 mailimap_list_result_free(lep_list);
2730         }
2731
2732         g_free(real_path);
2733
2734         node = item->node->children;
2735         while (node != NULL) {
2736                 FolderItem *old_item = FOLDER_ITEM(node->data);
2737                 GNode *next = node->next;
2738
2739                 new_item = NULL;
2740                 for (cur = item_list; cur != NULL; cur = cur->next) {
2741                         FolderItem *cur_item = FOLDER_ITEM(cur->data);
2742                         if (!strcmp2(old_item->path, cur_item->path)) {
2743                                 new_item = cur_item;
2744                                 break;
2745                         }
2746                 }
2747                 if (!new_item) {
2748                         if (old_item && old_item->path && !strcasecmp(old_item->path, "INBOX")) {
2749                                 debug_print("not removing INBOX\n");
2750                         } else {
2751                                 debug_print("folder '%s' not found. removing...\n",
2752                                             old_item->path);
2753                                 folder_item_remove(old_item);
2754                         }
2755                 } else {
2756                         old_item->no_sub = new_item->no_sub;
2757                         old_item->no_select = new_item->no_select;
2758                         if (old_item->no_sub == TRUE && node->children) {
2759                                 debug_print("folder '%s' doesn't have "
2760                                             "subfolders. removing...\n",
2761                                             old_item->path);
2762                                 folder_item_remove_children(old_item);
2763                         }
2764                 }
2765
2766                 node = next;
2767         }
2768
2769         for (cur = item_list; cur != NULL; cur = cur->next) {
2770                 FolderItem *cur_item = FOLDER_ITEM(cur->data);
2771                 new_item = NULL;
2772
2773                 for (node = item->node->children; node != NULL;
2774                      node = node->next) {
2775                         if (!strcmp2(FOLDER_ITEM(node->data)->path,
2776                                      cur_item->path)) {
2777                                 new_item = FOLDER_ITEM(node->data);
2778                                 folder_item_destroy(cur_item);
2779                                 cur_item = NULL;
2780                                 break;
2781                         }
2782                 }
2783                 if (!new_item) {
2784                         new_item = cur_item;
2785                         debug_print("new folder '%s' found.\n", new_item->path);
2786                         folder_item_append(item, new_item);
2787                 }
2788
2789                 if (!strcasecmp(new_item->path, "INBOX")) {
2790                         new_item->stype = F_INBOX;
2791                         folder->inbox = new_item;
2792                 } else if (!folder_item_parent(item) || item->stype == F_INBOX) {
2793                         gchar *base;
2794
2795                         base = g_path_get_basename(new_item->path);
2796
2797                         if (!folder->outbox && !g_ascii_strcasecmp(base, "Sent")) {
2798                                 new_item->stype = F_OUTBOX;
2799                                 folder->outbox = new_item;
2800                         } else if (!folder->draft && (!g_ascii_strcasecmp(base, "Drafts") || !g_ascii_strcasecmp(base, "Draft"))) {
2801                                 new_item->stype = F_DRAFT;
2802                                 folder->draft = new_item;
2803                         } else if (!folder->queue && !g_ascii_strcasecmp(base, "Queue")) {
2804                                 new_item->stype = F_QUEUE;
2805                                 folder->queue = new_item;
2806                         } else if (!folder->trash && !g_ascii_strcasecmp(base, "Trash")) {
2807                                 new_item->stype = F_TRASH;
2808                                 folder->trash = new_item;
2809                         }
2810                         g_free(base);
2811                 }
2812
2813                 if (new_item->no_sub == FALSE)
2814                         imap_scan_tree_recursive(session, new_item, subs_only);
2815         }
2816
2817         g_slist_free(item_list);
2818
2819         return MAILIMAP_NO_ERROR;
2820 }
2821
2822 GList *imap_scan_subtree(Folder *folder, FolderItem *item, gboolean unsubs_only, gboolean recursive)
2823 {
2824         IMAPSession *session = imap_session_get(folder);
2825         gchar *real_path;
2826         gchar *wildcard_path;
2827         gchar separator;
2828         gchar wildcard[3];
2829         clist * lep_list;
2830         GSList *item_list = NULL, *cur;
2831         GList *child_list = NULL, *tmplist = NULL;
2832         GSList *sub_list = NULL;
2833         int r = MAILIMAP_NO_ERROR;
2834
2835         if (!session)
2836                 return NULL;
2837
2838         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &r);
2839         if (is_fatal(r))
2840                 return NULL;
2841
2842         if (item->path) {
2843                 wildcard[0] = separator;
2844                 wildcard[1] = '%';
2845                 wildcard[2] = '\0';
2846                 real_path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &r);
2847                 if (is_fatal(r)) {
2848                         g_free(real_path);
2849                         return NULL;
2850                 }
2851         } else {
2852                 wildcard[0] = '%';
2853                 wildcard[1] = '\0';
2854                 real_path = g_strdup("");
2855         }
2856
2857         Xstrcat_a(wildcard_path, real_path, wildcard,
2858                   {g_free(real_path); return NULL;});
2859         lep_list = NULL;
2860
2861         if (unsubs_only)
2862                 statusbar_print_all(_("Looking for unsubscribed folders in %s..."),
2863                                 item->path?item->path:item->name);
2864         else
2865                 statusbar_print_all(_("Looking for subfolders of %s..."),
2866                                 item->path?item->path:item->name);
2867
2868         r = imap_threaded_list(folder, "", wildcard_path, &lep_list);
2869         if (r) {
2870                 g_free(real_path);
2871                 statusbar_pop_all();
2872                 return NULL;
2873         }
2874         item_list = imap_list_from_lep(IMAP_FOLDER(folder),
2875                                lep_list, real_path, FALSE);
2876         mailimap_list_result_free(lep_list);
2877
2878         for (cur = item_list; cur != NULL; cur = cur->next) {
2879                 FolderItem *cur_item = FOLDER_ITEM(cur->data);
2880                 if (recursive) {
2881                         tmplist = imap_scan_subtree(folder, cur_item,
2882                                         unsubs_only, recursive);
2883                         if (tmplist)
2884                                 child_list = g_list_concat(child_list, tmplist);
2885                 }
2886                 child_list = g_list_prepend(child_list,
2887                                 imap_get_real_path(session,
2888                                         IMAP_FOLDER(folder), cur_item->path, &r));
2889                 if (is_fatal(r)) {
2890                         g_free(real_path);
2891                         statusbar_pop_all();
2892                         return NULL;
2893                 }
2894                 folder_item_destroy(cur_item);
2895         }
2896         child_list = g_list_reverse(child_list);
2897         g_slist_free(item_list);
2898
2899         if (unsubs_only) {
2900                 r = imap_threaded_lsub(folder, "", wildcard_path, &lep_list);
2901                 if (r) {
2902                         g_free(real_path);
2903                         statusbar_pop_all();
2904                         return NULL;
2905                 }
2906                 sub_list = imap_list_from_lep(IMAP_FOLDER(folder),
2907                                        lep_list, real_path, FALSE);
2908                 mailimap_list_result_free(lep_list);
2909
2910                 for (cur = sub_list; cur != NULL; cur = cur->next) {
2911                         FolderItem *cur_item = FOLDER_ITEM(cur->data);
2912                         GList *oldlitem = NULL;
2913                         gchar *tmp = imap_get_real_path(session,
2914                                         IMAP_FOLDER(folder), cur_item->path, &r);
2915                         if (r) {
2916                                 g_free(real_path);
2917                                 statusbar_pop_all();
2918                                 g_free(tmp);
2919                                 return NULL;
2920                         }
2921                         folder_item_destroy(cur_item);
2922                         oldlitem = g_list_find_custom(
2923                                         child_list, tmp, (GCompareFunc)strcmp2);
2924                         if (oldlitem) {
2925                                 child_list = g_list_remove_link(child_list, oldlitem);
2926                                 g_free(oldlitem->data);
2927                                 g_list_free(oldlitem);
2928                         }
2929                         g_free(tmp);
2930                 }
2931         }
2932
2933         g_free(real_path);
2934         statusbar_pop_all();
2935
2936         return child_list;
2937 }
2938
2939 static gint imap_create_tree(Folder *folder)
2940 {
2941         g_return_val_if_fail(folder != NULL, -1);
2942         g_return_val_if_fail(folder->node != NULL, -1);
2943         g_return_val_if_fail(folder->node->data != NULL, -1);
2944         g_return_val_if_fail(folder->account != NULL, -1);
2945
2946         imap_scan_tree(folder);
2947         imap_create_missing_folders(folder);
2948
2949         return 0;
2950 }
2951
2952 static void imap_create_missing_folders(Folder *folder)
2953 {
2954         g_return_if_fail(folder != NULL);
2955
2956         if (!folder->inbox)
2957                 folder->inbox = imap_create_special_folder
2958                         (folder, F_INBOX, "INBOX");
2959         if (!folder->trash)
2960                 folder->trash = imap_create_special_folder
2961                         (folder, F_TRASH, "Trash");
2962         if (!folder->queue)
2963                 folder->queue = imap_create_special_folder
2964                         (folder, F_QUEUE, "Queue");
2965         if (!folder->outbox)
2966                 folder->outbox = imap_create_special_folder
2967                         (folder, F_OUTBOX, "Sent");
2968         if (!folder->draft)
2969                 folder->draft = imap_create_special_folder
2970                         (folder, F_DRAFT, "Drafts");
2971 }
2972
2973 static FolderItem *imap_create_special_folder(Folder *folder,
2974                                               SpecialFolderItemType stype,
2975                                               const gchar *name)
2976 {
2977         FolderItem *item;
2978         FolderItem *new_item;
2979
2980         g_return_val_if_fail(folder != NULL, NULL);
2981         g_return_val_if_fail(folder->node != NULL, NULL);
2982         g_return_val_if_fail(folder->node->data != NULL, NULL);
2983         g_return_val_if_fail(folder->account != NULL, NULL);
2984         g_return_val_if_fail(name != NULL, NULL);
2985
2986         item = FOLDER_ITEM(folder->node->data);
2987         new_item = imap_create_folder(folder, item, name);
2988
2989         if (!new_item) {
2990                 g_warning("Can't create '%s'\n", name);
2991                 if (!folder->inbox) return NULL;
2992
2993                 new_item = imap_create_folder(folder, folder->inbox, name);
2994                 if (!new_item)
2995                         g_warning("Can't create '%s' under INBOX\n", name);
2996                 else
2997                         new_item->stype = stype;
2998         } else
2999                 new_item->stype = stype;
3000
3001         return new_item;
3002 }
3003
3004 static gchar *imap_folder_get_path(Folder *folder)
3005 {
3006         gchar *folder_path;
3007
3008         g_return_val_if_fail(folder != NULL, NULL);
3009         g_return_val_if_fail(folder->account != NULL, NULL);
3010
3011         folder_path = g_strconcat(get_imap_cache_dir(),
3012                                   G_DIR_SEPARATOR_S,
3013                                   folder->account->recv_server,
3014                                   G_DIR_SEPARATOR_S,
3015                                   folder->account->userid,
3016                                   NULL);
3017
3018         return folder_path;
3019 }
3020
3021 #ifdef G_OS_WIN32
3022 static gchar *imap_encode_unsafe_chars(const gchar *str)
3023 {
3024         gchar *ret = NULL, *o_ret;
3025         gchar *i;
3026         if (!str)
3027                 return NULL;
3028         ret = g_malloc(3*strlen(str)+1);
3029         o_ret = ret;
3030         for (i = str; *i; i++) {
3031                 switch(*i) {
3032                         case ':':
3033                         case '|':
3034                         case '<':
3035                         case '>':
3036                         case '*':
3037                         case '?':
3038                         case '#':
3039                                 *ret++ = '%';
3040                                 *ret++ = '0'+(*i/10);
3041                                 *ret++ = '0'+(*i%10);
3042                                 break;
3043                         default:
3044                                 *ret++ = *i;
3045                 }
3046         }
3047         *ret++ = '\0';
3048         return o_ret;
3049 }
3050 #endif
3051 static gchar *imap_item_get_path(Folder *folder, FolderItem *item)
3052 {
3053         gchar *folder_path, *path;
3054         gchar *item_path = NULL;
3055
3056         g_return_val_if_fail(folder != NULL, NULL);
3057         g_return_val_if_fail(item != NULL, NULL);
3058         folder_path = imap_folder_get_path(folder);
3059
3060         g_return_val_if_fail(folder_path != NULL, NULL);
3061
3062 #ifdef G_OS_UNIX
3063         item_path = g_strdup(item->path);
3064 #else
3065         item_path = imap_encode_unsafe_chars(item->path);
3066 #endif
3067
3068         if (g_path_is_absolute(folder_path)) {
3069                 if (item_path)
3070                         path = g_strconcat(folder_path, G_DIR_SEPARATOR_S,
3071                                            item_path, NULL);
3072                 else
3073                         path = g_strdup(folder_path);
3074         } else {
3075                 if (item_path)
3076                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
3077                                            folder_path, G_DIR_SEPARATOR_S,
3078                                            item_path, NULL);
3079                 else
3080                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
3081                                            folder_path, NULL);
3082         }
3083         g_free(folder_path);
3084         g_free(item_path);
3085 #ifdef G_OS_WIN32
3086         while (strchr(path, '/'))
3087                 *strchr(path, '/') = '\\';
3088 #endif
3089
3090         return path;
3091 }
3092
3093 static FolderItem *imap_create_folder(Folder *folder, FolderItem *parent,
3094                                const gchar *name)
3095 {
3096         gchar *dirpath, *imap_path;
3097         IMAPSession *session;
3098         FolderItem *new_item;
3099         gchar separator;
3100         gchar *new_name;
3101         const gchar *p;
3102         gint ok = MAILIMAP_NO_ERROR;
3103         gboolean no_select = FALSE, no_sub = FALSE;
3104         gboolean exist = FALSE;
3105
3106         g_return_val_if_fail(folder != NULL, NULL);
3107         g_return_val_if_fail(folder->account != NULL, NULL);
3108         g_return_val_if_fail(parent != NULL, NULL);
3109         g_return_val_if_fail(name != NULL, NULL);
3110
3111         if (to_number(name) > 0) {
3112                 gchar *cached_msg = imap_get_cached_filename(parent, to_number(name));
3113                 if (is_file_exist(cached_msg)) {
3114                         if (claws_unlink(cached_msg) != 0) {
3115                                 return NULL;
3116                         }
3117                 }
3118         }
3119
3120         debug_print("getting session...\n");
3121         session = imap_session_get(folder);
3122         if (!session) {
3123                 return NULL;
3124         }
3125
3126         if (!folder_item_parent(parent) && strcasecmp(name, "INBOX") == 0) {
3127                 dirpath = g_strdup(name);
3128         }else if (parent->path)
3129                 dirpath = g_strconcat(parent->path, "/", name, NULL);
3130         else if ((p = strchr(name, '/')) != NULL && *(p + 1) != '\0')
3131                 dirpath = g_strdup(name);
3132         else if (folder->account->imap_dir && *folder->account->imap_dir) {
3133                 gchar *imap_dir;
3134
3135                 Xstrdup_a(imap_dir, folder->account->imap_dir, {return NULL;});
3136                 strtailchomp(imap_dir, '/');
3137                 dirpath = g_strconcat(imap_dir, "/", name, NULL);
3138         } else
3139                 dirpath = g_strdup(name);
3140
3141
3142
3143         /* keep trailing directory separator to create a folder that contains
3144            sub folder */
3145         imap_path = imap_utf8_to_modified_utf7(dirpath, FALSE);
3146
3147         strtailchomp(dirpath, '/');
3148         Xstrdup_a(new_name, name, {
3149                 g_free(dirpath);
3150                 g_free(imap_path);
3151                 return NULL;});
3152
3153         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), imap_path, &ok);
3154         if (is_fatal(ok)) {
3155                 g_free(imap_path);
3156                 return NULL;
3157         }
3158         imap_path_separator_subst(imap_path, separator);
3159         /* remove trailing / for display */
3160         strtailchomp(new_name, '/');
3161
3162         if (strcasecmp(dirpath, "INBOX") != 0) {
3163                 GPtrArray *argbuf;
3164                 int r;
3165                 clist * lep_list;
3166
3167                 argbuf = g_ptr_array_new();
3168                 r = imap_threaded_list(folder, "", imap_path, &lep_list);
3169                 if (r != MAILIMAP_NO_ERROR) {
3170                         imap_handle_error(SESSION(session), NULL, r);
3171                         log_warning(LOG_PROTOCOL, _("can't create mailbox: LIST failed\n"));
3172                         g_free(imap_path);
3173                         g_free(dirpath);
3174                         ptr_array_free_strings(argbuf);
3175                         g_ptr_array_free(argbuf, TRUE);
3176                         return NULL;
3177                 }
3178
3179                 if (clist_count(lep_list) > 0)
3180                         exist = TRUE;
3181                 mailimap_list_result_free(lep_list);
3182                 lep_list = NULL;
3183                 if (!exist) {
3184                         ok = imap_cmd_create(session, imap_path);
3185                         if (ok != MAILIMAP_NO_ERROR) {
3186                                 log_warning(LOG_PROTOCOL, _("can't create mailbox\n"));
3187                                 g_free(imap_path);
3188                                 g_free(dirpath);
3189                                 return NULL;
3190                         }
3191                         r = imap_threaded_list(folder, "", imap_path, &lep_list);
3192                         if (r == MAILIMAP_NO_ERROR) {
3193                                 GSList *item_list = imap_list_from_lep(IMAP_FOLDER(folder),
3194                                                lep_list, dirpath, TRUE);
3195                                 if (item_list) {
3196                                         FolderItem *cur_item = FOLDER_ITEM(item_list->data);
3197                                         no_select = cur_item->no_select;
3198                                         no_sub = cur_item->no_sub;
3199                                         g_slist_free(item_list);
3200                                 }
3201                                 mailimap_list_result_free(lep_list);
3202                         } else {
3203                                 imap_handle_error(SESSION(session), NULL, r);
3204                         }
3205                 }
3206                 imap_threaded_subscribe(folder, imap_path, TRUE);
3207         } else {
3208                 clist *lep_list;
3209                 int r;
3210                 /* just get flags */
3211                 r = imap_threaded_list(folder, "", "INBOX", &lep_list);
3212                 if (r == MAILIMAP_NO_ERROR) {
3213                         GSList *item_list = imap_list_from_lep(IMAP_FOLDER(folder),
3214                                        lep_list, dirpath, TRUE);
3215                         if (item_list) {
3216                                 FolderItem *cur_item = FOLDER_ITEM(item_list->data);
3217                                 no_select = cur_item->no_select;
3218                                 no_sub = cur_item->no_sub;
3219                                 g_slist_free(item_list);
3220                         }
3221                         mailimap_list_result_free(lep_list);
3222                 } else {
3223                         imap_handle_error(SESSION(session), NULL, r);
3224                 }
3225         }
3226
3227         new_item = folder_item_new(folder, new_name, dirpath);
3228         new_item->no_select = no_select;
3229         new_item->no_sub = no_sub;
3230         folder_item_append(parent, new_item);
3231         g_free(imap_path);
3232         g_free(dirpath);
3233
3234         dirpath = folder_item_get_path(new_item);
3235         if (!is_dir_exist(dirpath))
3236                 make_dir_hier(dirpath);
3237         g_free(dirpath);
3238
3239         if (exist) {
3240                 /* folder existed, scan it */
3241                 imap_scan_required(folder, new_item);
3242                 folder_item_scan_full(new_item, FALSE);
3243         }
3244
3245         return new_item;
3246 }
3247
3248 static gint imap_rename_folder(Folder *folder, FolderItem *item,
3249                                const gchar *name)
3250 {
3251         gchar *dirpath;
3252         gchar *newpath;
3253         gchar *real_oldpath;
3254         gchar *real_newpath;
3255         gchar *paths[2];
3256         gchar *old_cache_dir;
3257         gchar *new_cache_dir;
3258         IMAPSession *session;
3259         gchar separator;
3260         gint ok = MAILIMAP_NO_ERROR;
3261         gint exists, recent, unseen;
3262         guint32 uid_validity;
3263
3264         g_return_val_if_fail(folder != NULL, -1);
3265         g_return_val_if_fail(item != NULL, -1);
3266         g_return_val_if_fail(item->path != NULL, -1);
3267         g_return_val_if_fail(name != NULL, -1);
3268
3269         debug_print("getting session...\n");
3270         session = imap_session_get(folder);
3271         if (!session) {
3272                 return -1;
3273         }
3274
3275         if (strchr(name, imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &ok)) != NULL ||
3276                 is_fatal(ok)) {
3277                 g_warning(_("New folder name must not contain the namespace "
3278                             "path separator"));
3279                 return -1;
3280         }
3281
3282         real_oldpath = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &ok);
3283         if (is_fatal(ok)) {
3284                 g_free(real_oldpath);
3285                 return -1;
3286         }
3287
3288         g_free(session->mbox);
3289         session->mbox = NULL;
3290         session->exists = 0;
3291         session->recent = 0;
3292         session->expunge = 0;
3293         ok = imap_cmd_examine(session, "INBOX",
3294                               &exists, &recent, &unseen, &uid_validity, FALSE);
3295         if (ok != MAILIMAP_NO_ERROR) {
3296                 g_free(real_oldpath);
3297                 return -1;
3298         }
3299
3300         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &ok);
3301         if (is_fatal(ok)) {
3302                 g_free(real_oldpath);
3303                 return -1;
3304         }
3305         if (strchr(item->path, G_DIR_SEPARATOR)) {
3306                 dirpath = g_path_get_dirname(item->path);
3307                 newpath = g_strconcat(dirpath, G_DIR_SEPARATOR_S, name, NULL);
3308                 g_free(dirpath);
3309         } else
3310                 newpath = g_strdup(name);
3311
3312         real_newpath = imap_utf8_to_modified_utf7(newpath, FALSE);
3313         imap_path_separator_subst(real_newpath, separator);
3314
3315         ok = imap_cmd_rename(session, real_oldpath, real_newpath);
3316         if (ok != MAILIMAP_NO_ERROR) {
3317                 log_warning(LOG_PROTOCOL, _("can't rename mailbox: %s to %s\n"),
3318                             real_oldpath, real_newpath);
3319                 g_free(real_oldpath);
3320                 g_free(newpath);
3321                 g_free(real_newpath);
3322                 return -1;
3323         }
3324         g_free(item->name);
3325         item->name = g_strdup(name);
3326
3327         old_cache_dir = folder_item_get_path(item);
3328
3329         paths[0] = g_strdup(item->path);
3330         paths[1] = newpath;
3331         g_node_traverse(item->node, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
3332                         imap_rename_folder_func, paths);
3333
3334         if (is_dir_exist(old_cache_dir)) {
3335                 new_cache_dir = folder_item_get_path(item);
3336                 if (g_rename(old_cache_dir, new_cache_dir) < 0) {
3337                         FILE_OP_ERROR(old_cache_dir, "rename");
3338                 }
3339                 g_free(new_cache_dir);
3340         }
3341
3342         g_free(old_cache_dir);
3343         g_free(paths[0]);
3344         g_free(newpath);
3345         g_free(real_oldpath);
3346         g_free(real_newpath);
3347         return 0;
3348 }
3349
3350 gint imap_subscribe(Folder *folder, FolderItem *item, gchar *rpath, gboolean sub)
3351 {
3352         gchar *path;
3353         gint r = MAILIMAP_NO_ERROR;
3354         IMAPSession *session;
3355         debug_print("getting session...\n");
3356
3357         session = imap_session_get(folder);
3358         if (!session) {
3359                 return -1;
3360         }
3361         if (item && item->path) {
3362                 path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &r);
3363                 if (!path)
3364                         return -1;
3365                 if (is_fatal(r)) {
3366                         g_free(path);
3367                         return -1;
3368                 }
3369                 if (!strcasecmp(path, "INBOX") && sub == FALSE) {
3370                         g_free(path);
3371                         return -1;
3372                 }
3373                 debug_print("%ssubscribing %s\n", sub?"":"un", path);
3374                 r = imap_threaded_subscribe(folder, path, sub);
3375                 g_free(path);
3376         } else if (rpath) {
3377                 r = imap_threaded_subscribe(folder, rpath, sub);
3378         } else
3379                 return -1;
3380         return r;
3381 }
3382
3383 static gint imap_remove_folder_real(Folder *folder, FolderItem *item)
3384 {
3385         gint ok = MAILIMAP_NO_ERROR;
3386         IMAPSession *session;
3387         gchar *path;
3388         gchar *cache_dir;
3389         gboolean selected_folder;
3390
3391         g_return_val_if_fail(folder != NULL, -1);
3392         g_return_val_if_fail(item != NULL, -1);
3393         g_return_val_if_fail(item->path != NULL, -1);
3394
3395         debug_print("getting session...\n");
3396         session = imap_session_get(folder);
3397         if (!session) {
3398                 return -1;
3399         }
3400         path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &ok);
3401         if (is_fatal(ok)) {
3402                 g_free(path);
3403                 return -1;
3404         }
3405         imap_threaded_subscribe(folder, path, FALSE);
3406
3407         selected_folder = (session->mbox != NULL) &&
3408                           (!strcmp(session->mbox, item->path));
3409         if (selected_folder) {
3410                 ok = imap_cmd_close(session);
3411                 if (ok != MAILIMAP_NO_ERROR) {
3412                         debug_print("close err %d\n", ok);
3413                         return ok;
3414                 }
3415         }
3416         ok = imap_cmd_delete(session, path);
3417         if (ok != MAILIMAP_NO_ERROR && !is_fatal(ok)) {
3418                 gchar *tmp = NULL;
3419
3420                 ok = MAILIMAP_NO_ERROR;
3421                 tmp = g_strdup_printf("%s%c", path,
3422                                 imap_get_path_separator(session, IMAP_FOLDER(folder), path, &ok));
3423                 g_free(path);
3424                 path = tmp;
3425                 if (!is_fatal(ok))
3426                         ok = imap_cmd_delete(session, path);
3427         }
3428
3429         if (ok != MAILIMAP_NO_ERROR) {
3430                 log_warning(LOG_PROTOCOL, _("can't delete mailbox\n"));
3431                 g_free(path);
3432                 return -1;
3433         }
3434
3435         g_free(path);
3436         cache_dir = folder_item_get_path(item);
3437         if (is_dir_exist(cache_dir) && remove_dir_recursive(cache_dir) < 0)
3438                 g_warning("can't remove directory '%s'\n", cache_dir);
3439         g_free(cache_dir);
3440         folder_item_remove(item);
3441         return 0;
3442 }
3443
3444 static gint imap_remove_folder(Folder *folder, FolderItem *item)
3445 {
3446         GNode *node, *next;
3447
3448         g_return_val_if_fail(item != NULL, -1);
3449         g_return_val_if_fail(item->folder != NULL, -1);
3450         g_return_val_if_fail(item->node != NULL, -1);
3451
3452         node = item->node->children;
3453         while (node != NULL) {
3454                 next = node->next;
3455                 if (imap_remove_folder(folder, FOLDER_ITEM(node->data)) < 0)
3456                         return -1;
3457                 node = next;
3458         }
3459         debug_print("IMAP removing %s\n", item->path);
3460
3461         if (imap_remove_all_msg(folder, item) < 0)
3462                 return -1;
3463         return imap_remove_folder_real(folder, item);
3464 }
3465
3466 typedef struct _uncached_data {
3467         IMAPSession *session;
3468         FolderItem *item;
3469         MsgNumberList *numlist;
3470         guint cur;
3471         guint total;
3472         gboolean done;
3473         int ok;
3474 } uncached_data;
3475
3476 static void *imap_get_uncached_messages_thread(void *data)
3477 {
3478         uncached_data *stuff = (uncached_data *)data;
3479         IMAPSession *session = stuff->session;
3480         FolderItem *item = stuff->item;
3481         MsgNumberList *numlist = stuff->numlist;
3482         GSList *newlist = NULL;
3483         GSList *llast = NULL;
3484         GSList *seq_list, *cur;
3485         gboolean got_alien_tags = FALSE;
3486
3487         debug_print("uncached_messages\n");
3488
3489         if (session == NULL || item == NULL || item->folder == NULL
3490             || FOLDER_CLASS(item->folder) != &imap_class) {
3491                 stuff->done = TRUE;
3492                 return NULL;
3493         }
3494
3495         seq_list = imap_get_lep_set_from_numlist(IMAP_FOLDER(item->folder), numlist);
3496         debug_print("get msgs info\n");
3497         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
3498                 struct mailimap_set * imapset;
3499                 unsigned int i;
3500                 int r;
3501                 carray * env_list;
3502                 int count;
3503
3504                 if (session->cancelled)
3505                         break;
3506
3507                 imapset = cur->data;
3508
3509                 r = imap_threaded_fetch_env(session->folder,
3510                                             imapset, &env_list);
3511                 if (r != MAILIMAP_NO_ERROR) {
3512                         imap_handle_error(SESSION(session), NULL, r);
3513                         if (is_fatal(r)) {
3514                                 stuff->ok = r;
3515                                 return NULL;
3516                         }
3517                         continue;
3518                 }
3519
3520                 session_set_access_time(SESSION(session));
3521
3522                 count = 0;
3523                 for(i = 0 ; i < carray_count(env_list) ; i += 2) {
3524                         struct imap_fetch_env_info * info;
3525                         MsgInfo * msginfo;
3526                         GSList *tags = NULL, *cur = NULL;
3527                         info = carray_get(env_list, i);
3528                         tags = carray_get(env_list, i+1);
3529                         msginfo = imap_envelope_from_lep(info, item);
3530                         if (msginfo == NULL) {
3531                                 slist_free_strings_full(tags);
3532                                 continue;
3533                         }
3534                         g_slist_free(msginfo->tags);
3535                         msginfo->tags = NULL;
3536
3537                         for (cur = tags; cur; cur = cur->next) {
3538                                 gchar *real_tag = imap_modified_utf7_to_utf8(cur->data, TRUE);
3539                                 gint id = 0;
3540                                 id = tags_get_id_for_str(real_tag);
3541                                 if (id == -1) {
3542                                         id = tags_add_tag(real_tag);
3543                                         got_alien_tags = TRUE;
3544                                 }
3545                                 if (!g_slist_find(msginfo->tags, GINT_TO_POINTER(id))) {
3546                                         msginfo->tags = g_slist_prepend(
3547                                                         msginfo->tags,
3548                                                         GINT_TO_POINTER(id));
3549                                 }
3550                                 g_free(real_tag);
3551                         }
3552                         if (msginfo->tags)
3553                                 msginfo->tags = g_slist_reverse(msginfo->tags);
3554                         slist_free_strings_full(tags);
3555                         msginfo->folder = item;
3556                         if (!newlist)
3557                                 llast = newlist = g_slist_append(newlist, msginfo);
3558                         else {
3559                                 llast = g_slist_append(llast, msginfo);
3560                                 llast = llast->next;
3561                         }
3562                         count ++;
3563                 }
3564
3565                 imap_fetch_env_free(env_list);
3566         }
3567
3568         if (got_alien_tags) {
3569                 tags_write_tags();
3570                 main_window_reflect_tags_changes(mainwindow_get_mainwindow());
3571         }
3572
3573         imap_lep_set_free(seq_list);
3574
3575         session_set_access_time(SESSION(session));
3576         stuff->done = TRUE;
3577         return newlist;
3578 }
3579
3580 #define MAX_MSG_NUM 50
3581
3582 static GSList *imap_get_uncached_messages(IMAPSession *session,
3583                                         FolderItem *item,
3584                                         MsgNumberList *numlist,
3585                                         int *r)
3586 {
3587         GSList *result = NULL;
3588         GSList * cur;
3589         uncached_data *data = g_new0(uncached_data, 1);
3590
3591         cur = numlist;
3592         data->total = g_slist_length(numlist);
3593         data->ok = MAILIMAP_NO_ERROR;
3594         debug_print("messages list : %i\n", data->total);
3595
3596         while (cur != NULL) {
3597                 GSList * partial_result;
3598                 int count;
3599                 GSList * newlist;
3600                 GSList * llast;
3601
3602                 llast = NULL;
3603                 count = 0;
3604                 newlist = NULL;
3605                 while (count < MAX_MSG_NUM) {
3606                         void * p;
3607
3608                         p = cur->data;
3609
3610                         if (newlist == NULL)
3611                                 llast = newlist = g_slist_append(newlist, p);
3612                         else {
3613                                 llast = g_slist_append(llast, p);
3614                                 llast = llast->next;
3615                         }
3616                         count ++;
3617
3618                         cur = cur->next;
3619                         if (cur == NULL)
3620                                 break;
3621                 }
3622
3623                 data->done = FALSE;
3624                 data->session = session;
3625                 data->item = item;
3626                 data->numlist = newlist;
3627                 data->cur += count;
3628
3629                 if (prefs_common.work_offline &&
3630                     !inc_offline_should_override(FALSE,
3631                         _("Claws Mail needs network access in order "
3632                           "to access the IMAP server."))) {
3633                         g_free(data);
3634                         return NULL;
3635                 }
3636
3637                 partial_result =
3638                         (GSList *)imap_get_uncached_messages_thread(data);
3639                 *r = data->ok;
3640                 if (data->ok != MAILIMAP_NO_ERROR) {
3641                         goto bail;
3642                 }
3643                 statusbar_progress_all(data->cur,data->total, 1);
3644
3645                 g_slist_free(newlist);
3646
3647                 result = g_slist_concat(result, partial_result);
3648         }
3649 bail:
3650         g_free(data);
3651
3652         statusbar_progress_all(0,0,0);
3653         statusbar_pop_all();
3654
3655         return result;
3656 }
3657
3658 static void imap_delete_all_cached_messages(FolderItem *item)
3659 {
3660         gchar *dir;
3661
3662         g_return_if_fail(item != NULL);
3663         g_return_if_fail(item->folder != NULL);
3664         g_return_if_fail(FOLDER_CLASS(item->folder) == &imap_class);
3665
3666         debug_print("Deleting all cached messages...\n");
3667
3668         dir = folder_item_get_path(item);
3669         if (is_dir_exist(dir))
3670                 remove_all_numbered_files(dir);
3671         g_free(dir);
3672
3673         debug_print("done.\n");
3674 }
3675
3676 gchar imap_get_path_separator_for_item(FolderItem *item)
3677 {
3678         Folder *folder = NULL;
3679         IMAPFolder *imap_folder = NULL;
3680         IMAPSession *session = NULL;
3681         gchar result = '/';
3682         gint ok = MAILIMAP_NO_ERROR;
3683         if (!item)
3684                 return '/';
3685         folder = item->folder;
3686
3687         if (!folder)
3688                 return '/';
3689
3690         imap_folder = IMAP_FOLDER(folder);
3691
3692         debug_print("getting session...");
3693         session = imap_session_get(FOLDER(folder));
3694         result = imap_get_path_separator(session, imap_folder, item->path, &ok);
3695         return result;
3696 }
3697
3698 static gchar imap_refresh_path_separator(IMAPSession *session, IMAPFolder *folder, const gchar *subfolder, gint *ok)
3699 {
3700         clist * lep_list;
3701         int r;
3702         gchar separator = '\0';
3703
3704         g_return_val_if_fail(session != NULL, '/');
3705         r = imap_threaded_list((Folder *)folder, "", subfolder, &lep_list);
3706
3707         if (r != MAILIMAP_NO_ERROR) {
3708                 imap_handle_error(SESSION(session), NULL, r);
3709                 log_warning(LOG_PROTOCOL, _("LIST failed\n"));
3710                 *ok = r;
3711                 return '\0';
3712         }
3713
3714         if (lep_list != NULL && clist_count(lep_list) > 0) {
3715                 clistiter * iter = clist_begin(lep_list);
3716                 struct mailimap_mailbox_list * mb;
3717                 mb = clist_content(iter);
3718
3719                 separator = mb->mb_delimiter;
3720                 debug_print("got separator: %c\n", folder->last_seen_separator);
3721         }
3722         *ok = MAILIMAP_NO_ERROR;
3723         mailimap_list_result_free(lep_list);
3724         return separator;
3725 }
3726
3727 static gchar imap_get_path_separator(IMAPSession *session, IMAPFolder *folder, const gchar *path, gint *ok)
3728 {
3729         gchar separator = '/';
3730         *ok = MAILIMAP_NO_ERROR;
3731         if (folder->last_seen_separator == 0) {
3732                 folder->last_seen_separator = imap_refresh_path_separator(session, folder, "", ok);
3733         }
3734
3735         if (folder->last_seen_separator == 0) {
3736                 folder->last_seen_separator = imap_refresh_path_separator(session, folder, "INBOX", ok);
3737         }
3738
3739         if (folder->last_seen_separator != 0) {
3740                 debug_print("using separator: %c\n", folder->last_seen_separator);
3741                 return folder->last_seen_separator;
3742         }
3743
3744         return separator;
3745 }
3746
3747 static gchar *imap_get_real_path(IMAPSession *session, IMAPFolder *folder, const gchar *path, gint *ok)
3748 {
3749         gchar *real_path = NULL;
3750         gchar separator;
3751
3752         g_return_val_if_fail(folder != NULL, NULL);
3753         g_return_val_if_fail(path != NULL, NULL);
3754
3755         *ok = MAILIMAP_NO_ERROR;
3756
3757         real_path = imap_utf8_to_modified_utf7(path, FALSE);
3758         separator = imap_get_path_separator(session, folder, path, ok);
3759         if (*ok == MAILIMAP_NO_ERROR)
3760                 imap_path_separator_subst(real_path, separator);
3761
3762         return real_path;
3763 }
3764
3765 static gint imap_set_message_flags(IMAPSession *session,
3766                                    IMAPFolderItem *item,
3767                                    MsgNumberList *numlist,
3768                                    IMAPFlags flags,
3769                                    GSList *tags,
3770                                    gboolean is_set)
3771 {
3772         gint ok = 0;
3773         GSList *seq_list;
3774         GSList * cur;
3775         gint total = 0;
3776         IMAPFolder *folder = NULL;
3777         GSList *sorted_list = NULL;
3778
3779         if (numlist == NULL || session == NULL)
3780                 return MAILIMAP_ERROR_BAD_STATE;
3781
3782         folder = IMAP_FOLDER(session->folder);
3783
3784         sorted_list = g_slist_copy(numlist);
3785         sorted_list = g_slist_sort(sorted_list, g_int_compare);
3786
3787         cur = g_slist_last(sorted_list);
3788
3789         if (cur)
3790                 total = GPOINTER_TO_INT(cur->data);
3791
3792         seq_list = imap_get_lep_set_from_numlist(IMAP_FOLDER(session->folder), sorted_list);
3793
3794         statusbar_print_all(_("Flagging messages..."));
3795
3796         for(cur = seq_list ; cur != NULL ; cur = g_slist_next(cur)) {
3797                 struct mailimap_set * imapset = (struct mailimap_set *)cur->data;
3798                 struct mailimap_set_item *set_item = NULL;
3799
3800                 if (imapset->set_list)
3801                         set_item = clist_content(clist_begin(imapset->set_list));
3802                 else
3803                         continue;
3804
3805                 if (set_item == NULL)
3806                         continue;
3807
3808                 statusbar_progress_all(set_item->set_first, total, 1);
3809
3810                 ok = imap_cmd_store(session, item, imapset,
3811                                     flags, tags, is_set);
3812                 statusbar_progress_all(set_item->set_last, total, 1);
3813                 if (ok != MAILIMAP_NO_ERROR && folder->max_set_size > 20) {
3814                         /* reduce max set size */
3815                         folder->max_set_size /= 2;
3816                 }
3817                 if (ok != MAILIMAP_NO_ERROR && is_fatal(ok)) {
3818                         break;
3819                 }
3820         }
3821
3822         g_slist_free(sorted_list);
3823
3824         statusbar_progress_all(0,0,0);
3825         statusbar_pop_all();
3826
3827         imap_lep_set_free(seq_list);
3828
3829         return ok;
3830 }
3831
3832 typedef struct _select_data {
3833         IMAPSession *session;
3834         gchar *real_path;
3835         gint *exists;
3836         gint *recent;
3837         gint *unseen;
3838         guint32 *uid_validity;
3839         gboolean done;
3840 } select_data;
3841
3842 static gint imap_select(IMAPSession *session, IMAPFolder *folder,
3843                         FolderItem *item,
3844                         gint *exists, gint *recent, gint *unseen,
3845                         guint32 *uid_validity, gint *can_create_flags,
3846                         gboolean block)
3847 {
3848         gchar *real_path;
3849         gint ok = MAILIMAP_NO_ERROR;
3850         gint exists_, recent_, unseen_;
3851         guint32 uid_validity_;
3852         gint can_create_flags_;
3853         const gchar *path = item ? item->path:NULL;
3854
3855         if (!item) {
3856                 return MAILIMAP_ERROR_BAD_STATE;
3857         }
3858
3859         if (!exists && !recent && !unseen && !uid_validity && !can_create_flags) {
3860                 if (session->mbox && strcmp(session->mbox, path) == 0)
3861                         return MAILIMAP_NO_ERROR;
3862         }
3863         if (!exists && !recent && !unseen && !uid_validity && can_create_flags) {
3864                 if (session->mbox && strcmp(session->mbox, path) == 0) {
3865                         if (IMAP_FOLDER_ITEM(item)->can_create_flags != ITEM_CAN_CREATE_FLAGS_UNKNOWN)
3866                                 return MAILIMAP_NO_ERROR;
3867                 }
3868         }
3869         if (!exists)
3870                 exists = &exists_;
3871         if (!recent)
3872                 recent = &recent_;
3873         if (!unseen)
3874                 unseen = &unseen_;
3875         if (!uid_validity)
3876                 uid_validity = &uid_validity_;
3877         if (!can_create_flags)
3878                 can_create_flags = &can_create_flags_;
3879
3880         g_free(session->mbox);
3881         session->mbox = NULL;
3882         session->exists = 0;
3883         session->recent = 0;
3884         session->expunge = 0;
3885
3886         real_path = imap_get_real_path(session, folder, path, &ok);
3887         if (is_fatal(ok)) {
3888                 g_free(real_path);
3889                 return ok;
3890         }
3891         g_slist_free(IMAP_FOLDER_ITEM(item)->ok_flags);
3892         IMAP_FOLDER_ITEM(item)->ok_flags = NULL;
3893         ok = imap_cmd_select(session, real_path,
3894                              exists, recent, unseen, uid_validity, can_create_flags,
3895                              &(IMAP_FOLDER_ITEM(item)->ok_flags), block);
3896         if (ok != MAILIMAP_NO_ERROR) {
3897                 log_warning(LOG_PROTOCOL, _("can't select folder: %s\n"), real_path);
3898         } else {
3899                 session->mbox = g_strdup(path);
3900                 session->folder_content_changed = FALSE;
3901                 session->exists = *exists;
3902                 session->recent = *recent;
3903                 session->expunge = 0;
3904                 session->unseen = *unseen;
3905                 session->uid_validity = *uid_validity;
3906                 debug_print("select: exists %d recent %d expunge %d uid_validity %d can_create_flags %d\n",
3907                         session->exists, session->recent, session->expunge,
3908                         session->uid_validity, *can_create_flags);
3909         }
3910         if (*can_create_flags) {
3911                 IMAP_FOLDER_ITEM(item)->can_create_flags = ITEM_CAN_CREATE_FLAGS;
3912         } else {
3913                 IMAP_FOLDER_ITEM(item)->can_create_flags = ITEM_CANNOT_CREATE_FLAGS;
3914         }
3915         g_free(real_path);
3916
3917         return ok;
3918 }
3919
3920 static gint imap_status(IMAPSession *session, IMAPFolder *folder,
3921                         const gchar *path, IMAPFolderItem *item,
3922                         gint *messages,
3923                         guint32 *uid_next, guint32 *uid_validity,
3924                         gint *unseen, gboolean block)
3925 {
3926         int r = MAILIMAP_NO_ERROR;
3927         clistiter * iter;
3928         struct mailimap_mailbox_data_status * data_status;
3929         int got_values;
3930         gchar *real_path;
3931         guint mask = 0;
3932
3933         real_path = imap_get_real_path(session, folder, path, &r);
3934         if (is_fatal(r)) {
3935                 g_free(real_path);
3936                 return r;
3937         }
3938         if (messages) {
3939                 mask |= 1 << 0;
3940                 *messages = 0;
3941         }
3942         if (uid_next) {
3943                 mask |= 1 << 2;
3944                 *uid_next = 0;
3945         }
3946         if (uid_validity) {
3947                 mask |= 1 << 3;
3948                 *uid_validity = 0;
3949         }
3950         if (unseen) {
3951                 mask |= 1 << 4;
3952                 *unseen = 0;
3953         }
3954
3955         if (session->mbox != NULL &&
3956             !strcmp(session->mbox, item->item.path)) {
3957                 r = imap_cmd_close(session);
3958                 if (r != MAILIMAP_NO_ERROR) {
3959                         debug_print("close err %d\n", r);
3960                         g_free(real_path);
3961                         return r;
3962                 }
3963         }
3964
3965         r = imap_threaded_status(FOLDER(folder), real_path,
3966                 &data_status, mask);
3967
3968         g_free(real_path);
3969         if (r != MAILIMAP_NO_ERROR) {
3970                 imap_handle_error(SESSION(session), NULL, r);
3971                 debug_print("status err %d\n", r);
3972                 return r;
3973         }
3974
3975         if (data_status == NULL || data_status->st_info_list == NULL) {
3976                 debug_print("data_status %p\n", data_status);
3977                 if (data_status) {
3978                         debug_print("data_status->st_info_list %p\n", data_status->st_info_list);
3979                         mailimap_mailbox_data_status_free(data_status);
3980                 }
3981                 return MAILIMAP_ERROR_BAD_STATE;
3982         }
3983
3984         got_values = 0;
3985         if (data_status->st_info_list) {
3986                 for(iter = clist_begin(data_status->st_info_list) ; iter != NULL ;
3987                     iter = clist_next(iter)) {
3988                         struct mailimap_status_info * info;
3989
3990                         info = clist_content(iter);
3991                         switch (info->st_att) {
3992                         case MAILIMAP_STATUS_ATT_MESSAGES:
3993                                 if (messages) {
3994                                         * messages = info->st_value;
3995                                         got_values |= 1 << 0;
3996                                 }
3997                                 break;
3998
3999                         case MAILIMAP_STATUS_ATT_UIDNEXT:
4000                                 if (uid_next) {
4001                                         * uid_next = info->st_value;
4002                                         got_values |= 1 << 2;
4003                                 }
4004                                 break;
4005
4006                         case MAILIMAP_STATUS_ATT_UIDVALIDITY:
4007                                 if (uid_validity) {
4008                                         * uid_validity = info->st_value;
4009                                         got_values |= 1 << 3;
4010                                 }
4011                                 break;
4012
4013                         case MAILIMAP_STATUS_ATT_UNSEEN:
4014                                 if (unseen) {
4015                                         * unseen = info->st_value;
4016                                         got_values |= 1 << 4;
4017                                 }
4018                                 break;
4019                         }
4020                 }
4021         }
4022         mailimap_mailbox_data_status_free(data_status);
4023
4024         if (got_values != mask) {
4025                 g_warning("status: incomplete values received (%d)\n", got_values);
4026         }
4027         return MAILIMAP_NO_ERROR;
4028 }
4029
4030 static void imap_free_capabilities(IMAPSession *session)
4031 {
4032         slist_free_strings_full(session->capability);
4033         session->capability = NULL;
4034 }
4035
4036 /* low-level IMAP4rev1 commands */
4037
4038 static gint imap_cmd_login(IMAPSession *session,
4039                            const gchar *user, const gchar *pass,
4040                            const gchar *type)
4041 {
4042         int r;
4043         gint ok;
4044
4045         if (!strcmp(type, "LOGIN") && imap_has_capability(session, "LOGINDISABLED")) {
4046                 gint ok = MAILIMAP_ERROR_BAD_STATE;
4047                 if (imap_has_capability(session, "STARTTLS")) {
4048 #ifdef USE_GNUTLS
4049                         log_warning(LOG_PROTOCOL, _("Server requires TLS to log in.\n"));
4050                         ok = imap_cmd_starttls(session);
4051                         if (ok != MAILIMAP_NO_ERROR) {
4052                                 log_warning(LOG_PROTOCOL, _("Can't start TLS session.\n"));
4053                                 return ok;
4054                         } else {
4055                                 /* refresh capas */
4056                                 imap_free_capabilities(session);
4057                                 if ((r = imap_get_capabilities(session)) != MAILIMAP_NO_ERROR) {
4058                                         imap_handle_error(SESSION(session), NULL, r);
4059                                         log_warning(LOG_PROTOCOL, _("Can't refresh capabilities.\n"));
4060                                         return r;
4061                                 }
4062                         }
4063 #else
4064                         log_error(LOG_PROTOCOL, _("Connection to %s failed: "
4065                                         "server requires TLS, but Claws Mail "
4066                                         "has been compiled without TLS "
4067                                         "support.\n"),
4068                                         SESSION(session)->server);
4069                         return MAILIMAP_ERROR_LOGIN;
4070 #endif
4071                 } else {
4072                         log_error(LOG_PROTOCOL, _("Server logins are disabled.\n"));
4073                         return MAILIMAP_ERROR_LOGIN;
4074                 }
4075         }
4076
4077         log_print(LOG_PROTOCOL, "IMAP4> Logging %s to %s using %s\n",
4078                         user,
4079                         SESSION(session)->server,
4080                         type);
4081         r = imap_threaded_login(session->folder, user, pass, type);
4082         if (r != MAILIMAP_NO_ERROR) {
4083                 imap_handle_error(SESSION(session), NULL, r);
4084                 log_print(LOG_PROTOCOL, "IMAP4< Error logging in to %s\n",
4085                                 SESSION(session)->server);
4086                 ok = r;
4087         } else {
4088                 log_print(LOG_PROTOCOL, "IMAP4< Login to %s successful\n",
4089                                 SESSION(session)->server);
4090                 ok = MAILIMAP_NO_ERROR;
4091         }
4092         return ok;
4093 }
4094
4095 static gint imap_cmd_noop(IMAPSession *session)
4096 {
4097         int r;
4098         unsigned int exists, recent, expunge, unseen, uidnext, uidval;
4099
4100         r = imap_threaded_noop(session->folder, &exists, &recent, &expunge, &unseen, &uidnext, &uidval);
4101         if (r != MAILIMAP_NO_ERROR) {
4102                 imap_handle_error(SESSION(session), NULL, r);
4103                 debug_print("noop err %d\n", r);
4104                 return r;
4105         }
4106
4107         if ((exists && exists != session->exists)
4108          || (recent && recent != session->recent)
4109          || (expunge && expunge != session->expunge)
4110          || (unseen && unseen != session->unseen)) {
4111                 session->folder_content_changed = TRUE;
4112         }
4113         if (uidnext != 0 && uidnext != session->uid_next) {
4114                 session->uid_next = uidnext;
4115                 session->folder_content_changed = TRUE;
4116         }
4117         if (uidval != 0 && uidval != session->uid_validity) {
4118                 session->uid_validity = uidval;
4119                 session->folder_content_changed = TRUE;
4120         }
4121
4122         session->exists = exists;
4123         session->recent = recent;
4124         session->expunge = expunge;
4125         session->unseen = unseen;
4126
4127         session_set_access_time(SESSION(session));
4128
4129         return MAILIMAP_NO_ERROR;
4130 }
4131
4132 #ifdef USE_GNUTLS
4133 static gint imap_cmd_starttls(IMAPSession *session)
4134 {
4135         int r;
4136
4137         r = imap_threaded_starttls(session->folder,
4138                 SESSION(session)->server, SESSION(session)->port);
4139         if (r != MAILIMAP_NO_ERROR) {
4140                 imap_handle_error(SESSION(session), NULL, r);
4141                 debug_print("starttls err %d\n", r);
4142                 return r;
4143         }
4144         return MAILIMAP_NO_ERROR;
4145 }
4146 #endif
4147
4148 static gint imap_cmd_select(IMAPSession *session, const gchar *folder,
4149                             gint *exists, gint *recent, gint *unseen,
4150                             guint32 *uid_validity, gint *can_create_flags,
4151                             GSList **ok_flags, gboolean block)
4152 {
4153         int r;
4154
4155         r = imap_threaded_select(session->folder, folder,
4156                                  exists, recent, unseen, uid_validity, can_create_flags, ok_flags);
4157         if (r != MAILIMAP_NO_ERROR) {
4158                 imap_handle_error(SESSION(session), NULL, r);
4159                 debug_print("select err %d\n", r);
4160                 return r;
4161         }
4162         return MAILIMAP_NO_ERROR;
4163 }
4164
4165 static gint imap_cmd_close(IMAPSession *session)
4166 {
4167         int r;
4168
4169         r = imap_threaded_close(session->folder);
4170         if (r != MAILIMAP_NO_ERROR) {
4171                 imap_handle_error(SESSION(session), NULL, r);
4172                 debug_print("close err %d\n", r);
4173                 return r;
4174         }
4175         g_free(session->mbox);
4176         session->mbox = NULL;
4177         session->exists = 0;
4178         session->recent = 0;
4179         session->expunge = 0;
4180         return MAILIMAP_NO_ERROR;
4181 }
4182
4183 static gint imap_cmd_examine(IMAPSession *session, const gchar *folder,
4184                              gint *exists, gint *recent, gint *unseen,
4185                              guint32 *uid_validity, gboolean block)
4186 {
4187         int r;
4188
4189         r = imap_threaded_examine(session->folder, folder,
4190                                   exists, recent, unseen, uid_validity);
4191         if (r != MAILIMAP_NO_ERROR) {
4192                 imap_handle_error(SESSION(session), NULL, r);
4193                 debug_print("examine err %d\n", r);
4194
4195                 return r;
4196         }
4197         return MAILIMAP_NO_ERROR;
4198 }
4199
4200 static gint imap_cmd_create(IMAPSession *session, const gchar *folder)
4201 {
4202         int r;
4203
4204         r = imap_threaded_create(session->folder, folder);
4205         if (r != MAILIMAP_NO_ERROR) {
4206                 imap_handle_error(SESSION(session), NULL, r);
4207                 return r;
4208         }
4209
4210         return MAILIMAP_NO_ERROR;
4211 }
4212
4213 static gint imap_cmd_rename(IMAPSession *session, const gchar *old_folder,
4214                             const gchar *new_folder)
4215 {
4216         int r;
4217
4218         r = imap_threaded_rename(session->folder, old_folder,
4219                                  new_folder);
4220         if (r != MAILIMAP_NO_ERROR) {
4221                 imap_handle_error(SESSION(session), NULL, r);
4222                 return r;
4223         }
4224
4225         return MAILIMAP_NO_ERROR;
4226 }
4227
4228 static gint imap_cmd_delete(IMAPSession *session, const gchar *folder)
4229 {
4230         int r;
4231
4232
4233         r = imap_threaded_delete(session->folder, folder);
4234         if (r != MAILIMAP_NO_ERROR) {
4235                 imap_handle_error(SESSION(session), NULL, r);
4236                 return r;
4237         }
4238
4239         return MAILIMAP_NO_ERROR;
4240 }
4241
4242 typedef struct _fetch_data {
4243         IMAPSession *session;
4244         guint32 uid;
4245         const gchar *filename;
4246         gboolean headers;
4247         gboolean body;
4248         gboolean done;
4249 } fetch_data;
4250
4251 static void *imap_cmd_fetch_thread(void *data)
4252 {
4253         fetch_data *stuff = (fetch_data *)data;
4254         IMAPSession *session = stuff->session;
4255         guint32 uid = stuff->uid;
4256         const gchar *filename = stuff->filename;
4257         int r;
4258
4259         if (stuff->body) {
4260                 r = imap_threaded_fetch_content(session->folder,
4261                                                uid, 1, filename);
4262         }
4263         else {
4264                 r = imap_threaded_fetch_content(session->folder,
4265                                                 uid, 0, filename);
4266         }
4267         if (r != MAILIMAP_NO_ERROR) {
4268                 imap_handle_error(SESSION(session), NULL, r);
4269                 debug_print("fetch err %d\n", r);
4270                 return GINT_TO_POINTER(r);
4271         }
4272         return GINT_TO_POINTER(MAILIMAP_NO_ERROR);
4273 }
4274
4275 static gint imap_cmd_fetch(IMAPSession *session, guint32 uid,
4276                                 const gchar *filename, gboolean headers,
4277                                 gboolean body)
4278 {
4279         fetch_data *data = g_new0(fetch_data, 1);
4280         int result = 0;
4281         data->done = FALSE;
4282         data->session = session;
4283         data->uid = uid;
4284         data->filename = filename;
4285         data->headers = headers;
4286         data->body = body;
4287
4288         if (prefs_common.work_offline &&
4289             !inc_offline_should_override(FALSE,
4290                 _("Claws Mail needs network access in order "
4291                   "to access the IMAP server."))) {
4292                 g_free(data);
4293                 return -1;
4294         }
4295         statusbar_print_all(_("Fetching message..."));
4296         result = GPOINTER_TO_INT(imap_cmd_fetch_thread(data));
4297         statusbar_pop_all();
4298         g_free(data);
4299         return result;
4300 }
4301
4302
4303 static gint imap_cmd_append(IMAPSession *session,
4304                             IMAPFolderItem *item,
4305                             const gchar *destfolder,
4306                             const gchar *file, IMAPFlags flags,
4307                             guint32 *new_uid)
4308 {
4309         struct mailimap_flag_list * flag_list;
4310         int r;
4311
4312         cm_return_val_if_fail(file != NULL, MAILIMAP_ERROR_BAD_STATE);
4313
4314         flag_list = imap_flag_to_lep(item, flags, NULL);
4315         lock_session(session);
4316         r = imap_threaded_append(session->folder, destfolder,
4317                          file, flag_list, (int *)new_uid);
4318         mailimap_flag_list_free(flag_list);
4319
4320         if (r != MAILIMAP_NO_ERROR) {
4321                 imap_handle_error(SESSION(session), NULL, r);
4322                 debug_print("append err %d\n", r);
4323                 return r;
4324         }
4325
4326         unlock_session(session);
4327
4328         return MAILIMAP_NO_ERROR;
4329 }
4330
4331 static gint imap_cmd_copy(IMAPSession *session, struct mailimap_set * set,
4332                           const gchar *destfolder,
4333                           struct mailimap_set **source, struct mailimap_set **dest)
4334 {
4335         int r;
4336
4337         g_return_val_if_fail(session != NULL, MAILIMAP_ERROR_BAD_STATE);
4338         g_return_val_if_fail(set != NULL, MAILIMAP_ERROR_BAD_STATE);
4339         g_return_val_if_fail(destfolder != NULL, MAILIMAP_ERROR_BAD_STATE);
4340
4341         r = imap_threaded_copy(session->folder, set, destfolder, source, dest);
4342         if (r != MAILIMAP_NO_ERROR) {
4343                 imap_handle_error(SESSION(session), NULL, r);
4344                 return r;
4345         }
4346
4347         return MAILIMAP_NO_ERROR;
4348 }
4349
4350 static gint imap_cmd_store(IMAPSession *session,
4351                            IMAPFolderItem *item,
4352                            struct mailimap_set * set,
4353                            IMAPFlags flags, GSList *tags, int do_add)
4354 {
4355         int r;
4356         struct mailimap_flag_list * flag_list = NULL;
4357         struct mailimap_store_att_flags * store_att_flags;
4358
4359         flag_list = imap_flag_to_lep(item, flags, tags);
4360
4361         if (do_add)
4362                 store_att_flags =
4363                         mailimap_store_att_flags_new_add_flags_silent(flag_list);
4364         else
4365                 store_att_flags =
4366                         mailimap_store_att_flags_new_remove_flags_silent(flag_list);
4367
4368         r = imap_threaded_store(session->folder, set, store_att_flags);
4369         mailimap_store_att_flags_free(store_att_flags);
4370         if (r != MAILIMAP_NO_ERROR) {
4371                 imap_handle_error(SESSION(session), NULL, r);
4372                 return r;
4373         }
4374
4375         return MAILIMAP_NO_ERROR;
4376 }
4377
4378 static gint imap_cmd_expunge(IMAPSession *session, gboolean do_expunge)
4379 {
4380         int r;
4381
4382         if (!do_expunge)
4383                 return MAILIMAP_NO_ERROR;
4384
4385         if (prefs_common.work_offline &&
4386             !inc_offline_should_override(FALSE,
4387                 _("Claws Mail needs network access in order "
4388                   "to access the IMAP server."))) {
4389                 return -1;
4390         }
4391
4392         r = imap_threaded_expunge(session->folder);
4393         if (r != MAILIMAP_NO_ERROR) {
4394                 imap_handle_error(SESSION(session), NULL, r);
4395                 return r;
4396         }
4397
4398         return MAILIMAP_NO_ERROR;
4399 }
4400
4401 gint imap_expunge(Folder *folder, FolderItem *item)
4402 {
4403         IMAPSession *session = imap_session_get(folder);
4404         if (session == NULL)
4405                 return -1;
4406
4407         return imap_cmd_expunge(session, TRUE);
4408 }
4409
4410 static void imap_path_separator_subst(gchar *str, gchar separator)
4411 {
4412         gchar *p;
4413         gboolean in_escape = FALSE;
4414
4415         if (!separator || separator == '/') return;
4416
4417         for (p = str; *p != '\0'; p++) {
4418                 if (*p == '/' && !in_escape)
4419                         *p = separator;
4420                 else if (*p == '&' && *(p + 1) != '-' && !in_escape)
4421                         in_escape = TRUE;
4422                 else if (*p == '-' && in_escape)
4423                         in_escape = FALSE;
4424         }
4425 }
4426
4427 static gboolean imap_rename_folder_func(GNode *node, gpointer data)
4428 {
4429         FolderItem *item = node->data;
4430         gchar **paths = data;
4431         const gchar *oldpath = paths[0];
4432         const gchar *newpath = paths[1];
4433         gchar *real_oldpath, *real_newpath;
4434         gchar *base;
4435         gchar *new_itempath;
4436         gint oldpathlen;
4437         IMAPSession *session = imap_session_get(item->folder);
4438         gint ok = MAILIMAP_NO_ERROR;
4439         oldpathlen = strlen(oldpath);
4440         if (strncmp(oldpath, item->path, oldpathlen) != 0) {
4441                 g_warning("path doesn't match: %s, %s\n", oldpath, item->path);
4442                 return TRUE;
4443         }
4444
4445         base = item->path + oldpathlen;
4446         while (*base == G_DIR_SEPARATOR) base++;
4447         if (*base == '\0')
4448                 new_itempath = g_strdup(newpath);
4449         else
4450                 new_itempath = g_strconcat(newpath, G_DIR_SEPARATOR_S, base,
4451                                            NULL);
4452
4453         real_oldpath = imap_get_real_path(session, IMAP_FOLDER(item->folder), item->path, &ok);
4454         g_free(item->path);
4455         item->path = new_itempath;
4456
4457         real_newpath = imap_get_real_path(session, IMAP_FOLDER(item->folder), item->path, &ok);
4458
4459         imap_threaded_subscribe(item->folder, real_oldpath, FALSE);
4460         imap_threaded_subscribe(item->folder, real_newpath, TRUE);
4461
4462         g_free(real_oldpath);
4463         g_free(real_newpath);
4464         return FALSE;
4465 }
4466
4467 static gint get_list_of_uids(IMAPSession *session, Folder *folder, IMAPFolderItem *item, GSList **msgnum_list)
4468 {
4469         GSList *uidlist, *elem;
4470         int r = -1;
4471         clist * lep_uidlist;
4472         gint ok, nummsgs = 0;
4473
4474         if (session == NULL) {
4475                 return -1;
4476         }
4477
4478         ok = imap_select(session, IMAP_FOLDER(folder), FOLDER_ITEM(item),
4479                          NULL, NULL, NULL, NULL, NULL, TRUE);
4480         if (ok != MAILIMAP_NO_ERROR) {
4481                 return -1;
4482         }
4483
4484         g_slist_free(item->uid_list);
4485         item->uid_list = NULL;
4486
4487         uidlist = NULL;
4488
4489         if (folder->account && folder->account->low_bandwidth) {
4490                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SIMPLE,
4491                                 NULL, NULL, NULL, &lep_uidlist);
4492         }
4493
4494         if (r == MAILIMAP_NO_ERROR) {
4495                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
4496                 mailimap_search_result_free(lep_uidlist);
4497         } else {
4498                 carray * lep_uidtab;
4499                 if (r != -1) { /* inited */
4500                         imap_handle_error(SESSION(session), NULL, r);
4501                         if (is_fatal(r))
4502                                 return -1;
4503                 }
4504                 r = imap_threaded_fetch_uid(folder, 1,
4505                                     &lep_uidtab);
4506                 if (r == MAILIMAP_NO_ERROR) {
4507                         uidlist = imap_uid_list_from_lep_tab(lep_uidtab);
4508                         imap_fetch_uid_list_free(lep_uidtab);
4509                 }
4510         }
4511
4512         if (r != MAILIMAP_NO_ERROR) {
4513                 imap_handle_error(SESSION(session), NULL, r);
4514                 return -1;
4515         }
4516
4517         for (elem = uidlist; elem != NULL; elem = g_slist_next(elem)) {
4518                 guint msgnum;
4519
4520                 msgnum = GPOINTER_TO_INT(elem->data);
4521
4522                 *msgnum_list = g_slist_prepend(*msgnum_list, GINT_TO_POINTER(msgnum));
4523                 item->uid_list = g_slist_prepend(item->uid_list, GINT_TO_POINTER(msgnum));
4524                 nummsgs++;
4525         }
4526         g_slist_free(uidlist);
4527
4528         unlock_session(session); /* locked from imap_get_num_list */
4529
4530         return nummsgs;
4531
4532 }
4533
4534 gint imap_get_num_list(Folder *folder, FolderItem *_item, GSList **msgnum_list, gboolean *old_uids_valid)
4535 {
4536         IMAPFolderItem *item = (IMAPFolderItem *)_item;
4537         IMAPSession *session;
4538         gint nummsgs;
4539         GSList *uidlist = NULL;
4540         gchar *dir;
4541         gint known_list_len = 0;
4542         gchar *path;
4543
4544         debug_print("get_num_list\n");
4545
4546         g_return_val_if_fail(folder != NULL, -1);
4547         g_return_val_if_fail(item != NULL, -1);
4548         g_return_val_if_fail(item->item.path != NULL, -1);
4549         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
4550         g_return_val_if_fail(folder->account != NULL, -1);
4551
4552         known_list_len = g_slist_length(item->uid_list);
4553         if (!item->should_update) {
4554                 debug_print("get_num_list: nothing to update\n");
4555                 *old_uids_valid = TRUE;
4556                 if (known_list_len == item->item.total_msgs
4557                  && known_list_len > 0) {
4558                         *msgnum_list = g_slist_copy(item->uid_list);
4559                         return known_list_len;
4560                 } else {
4561                         debug_print("don't know the list length...\n");
4562                 }
4563         }
4564
4565         if (prefs_common.work_offline &&
4566             !inc_offline_should_override(FALSE,
4567                 _("Claws Mail needs network access in order "
4568                   "to access the IMAP server."))) {
4569                 return -1;
4570         }
4571
4572         path = folder_item_get_path(_item);
4573         if (!is_dir_exist(path)) {
4574                 if(is_file_exist(path))
4575                         claws_unlink(path);
4576                 make_dir_hier(path);
4577         }
4578         g_free(path);
4579
4580         debug_print("getting session...\n");
4581         session = imap_session_get(folder);
4582         g_return_val_if_fail(session != NULL, -1);
4583
4584         lock_session(session); /* unlocked by get_list_of_uids */
4585         if (FOLDER_ITEM(item)->path)
4586                 statusbar_print_all(_("Scanning folder %s%c%s..."),
4587                                       FOLDER_ITEM(item)->folder->name,
4588                                       G_DIR_SEPARATOR,
4589                                       FOLDER_ITEM(item)->path);
4590         else
4591                 statusbar_print_all(_("Scanning folder %s..."),
4592                                       FOLDER_ITEM(item)->folder->name);
4593
4594         if (item->should_trash_cache) {
4595                 *old_uids_valid = FALSE;
4596                 debug_print("get_num_list: trashing num list\n");
4597                 debug_print("Freeing imap uid cache\n");
4598                 item->lastuid = 0;
4599                 g_slist_free(item->uid_list);
4600                 item->uid_list = NULL;
4601
4602                 imap_delete_all_cached_messages((FolderItem *)item);
4603         } else {
4604                 debug_print("get_num_list: updating num list\n");
4605                 *old_uids_valid = TRUE;
4606         }
4607
4608         nummsgs = get_list_of_uids(session, folder, item, &uidlist);
4609         /* session could be broken now, in case of fatal error */
4610
4611         debug_print("get_num_list: got %d msgs\n", nummsgs);
4612
4613         if (nummsgs < 0) {
4614                 statusbar_pop_all();
4615                 return -1;
4616         }
4617
4618         *msgnum_list = uidlist;
4619
4620         dir = folder_item_get_path((FolderItem *)item);
4621         debug_print("removing old messages from %s\n", dir);
4622         remove_numbered_files_not_in_list(dir, *msgnum_list);
4623         g_free(dir);
4624
4625         debug_print("get_num_list - ok - %i\n", nummsgs);
4626         statusbar_pop_all();
4627         item->should_trash_cache = FALSE;
4628         item->should_update = FALSE;
4629         return nummsgs;
4630 }
4631
4632 static MsgInfo *imap_parse_msg(const gchar *file, FolderItem *item)
4633 {
4634         MsgInfo *msginfo;
4635         MsgFlags flags;
4636
4637         flags.perm_flags = MSG_NEW|MSG_UNREAD;
4638         flags.tmp_flags = 0;
4639
4640         g_return_val_if_fail(item != NULL, NULL);
4641         g_return_val_if_fail(file != NULL, NULL);
4642
4643         if (folder_has_parent_of_type(item, F_QUEUE)) {
4644                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
4645         } else if (folder_has_parent_of_type(item, F_DRAFT)) {
4646                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
4647         }
4648
4649         msginfo = procheader_parse_file(file, flags, FALSE, FALSE);
4650         if (!msginfo) return NULL;
4651
4652         msginfo->plaintext_file = g_strdup(file);
4653         msginfo->folder = item;
4654
4655         return msginfo;
4656 }
4657
4658 GSList *imap_get_msginfos(Folder *folder, FolderItem *item,
4659                           GSList *msgnum_list)
4660 {
4661         IMAPSession *session;
4662         MsgInfoList *ret = NULL;
4663         gint ok;
4664
4665         debug_print("get_msginfos\n");
4666
4667         g_return_val_if_fail(folder != NULL, NULL);
4668         g_return_val_if_fail(item != NULL, NULL);
4669         g_return_val_if_fail(msgnum_list != NULL, NULL);
4670
4671         debug_print("getting session...\n");
4672         session = imap_session_get(folder);
4673         g_return_val_if_fail(session != NULL, NULL);
4674
4675         lock_session(session); /* unlocked later in the function */
4676
4677         debug_print("IMAP getting msginfos\n");
4678         ok = imap_select(session, IMAP_FOLDER(folder), item,
4679                          NULL, NULL, NULL, NULL, NULL, FALSE);
4680         if (ok != MAILIMAP_NO_ERROR) {
4681                 return NULL;
4682         }
4683         if (!(folder_has_parent_of_type(item, F_DRAFT) ||
4684               folder_has_parent_of_type(item, F_QUEUE))) {
4685                 ret = g_slist_concat(ret,
4686                         imap_get_uncached_messages(session, item,
4687                                                    msgnum_list, &ok));
4688                 if (ok != MAILIMAP_NO_ERROR)
4689                         return NULL;
4690                 unlock_session(session);
4691         } else {
4692                 MsgNumberList *sorted_list, *elem, *llast = NULL;
4693                 gint startnum, lastnum;
4694
4695                 unlock_session(session);
4696
4697                 sorted_list = g_slist_sort(g_slist_copy(msgnum_list), g_int_compare);
4698
4699                 startnum = lastnum = GPOINTER_TO_INT(sorted_list->data);
4700
4701                 llast = g_slist_last(ret);
4702                 for (elem = sorted_list;; elem = g_slist_next(elem)) {
4703                         guint num = 0;
4704
4705                         if (elem)
4706                                 num = GPOINTER_TO_INT(elem->data);
4707
4708                         if (num > lastnum + 1 || elem == NULL) {
4709                                 int i;
4710                                 for (i = startnum; i <= lastnum; ++i) {
4711                                         gchar *file;
4712                                         file = imap_fetch_msg(folder, item, i);
4713                                         if (file != NULL) {
4714                                                 MsgInfo *msginfo = imap_parse_msg(file, item);
4715                                                 if (msginfo != NULL) {
4716                                                         msginfo->msgnum = i;
4717                                                         if (llast == NULL)
4718                                                                 llast = ret = g_slist_append(ret, msginfo);
4719                                                         else {
4720                                                                 llast = g_slist_append(llast, msginfo);
4721                                                                 llast = llast->next;
4722                                                         }
4723                                                 }
4724                                                 g_free(file);
4725                                         }
4726                                 }
4727
4728                                 if (elem == NULL)
4729                                         break;
4730
4731                                 startnum = num;
4732                         }
4733                         lastnum = num;
4734                 }
4735
4736                 g_slist_free(sorted_list);
4737         }
4738         return ret;
4739 }
4740
4741 MsgInfo *imap_get_msginfo(Folder *folder, FolderItem *item, gint uid)
4742 {
4743         MsgInfo *msginfo = NULL;
4744         MsgInfoList *msginfolist;
4745         MsgNumberList numlist;
4746
4747         numlist.next = NULL;
4748         numlist.data = GINT_TO_POINTER(uid);
4749
4750         msginfolist = imap_get_msginfos(folder, item, &numlist);
4751         if (msginfolist != NULL) {
4752                 msginfo = msginfolist->data;
4753                 g_slist_free(msginfolist);
4754         }
4755
4756         return msginfo;
4757 }
4758
4759 gboolean imap_scan_required(Folder *folder, FolderItem *_item)
4760 {
4761         IMAPSession *session;
4762         IMAPFolderItem *item = (IMAPFolderItem *)_item;
4763         gint ok, exists = 0, unseen = 0;
4764         guint32 uid_next = 0, uid_val = 0;
4765         gboolean selected_folder;
4766
4767         g_return_val_if_fail(folder != NULL, FALSE);
4768         g_return_val_if_fail(item != NULL, FALSE);
4769         g_return_val_if_fail(item->item.folder != NULL, FALSE);
4770         g_return_val_if_fail(FOLDER_CLASS(item->item.folder) == &imap_class, FALSE);
4771
4772         if (item->item.path == NULL)
4773                 return FALSE;
4774
4775         if (item->should_update) {
4776                 debug_print("scan already required\n");
4777                 return TRUE;
4778         }
4779         debug_print("getting session...\n");
4780         session = imap_session_get(folder);
4781
4782         g_return_val_if_fail(session != NULL, FALSE);
4783         lock_session(session); /* unlocked later in the function */
4784
4785         selected_folder = (session->mbox != NULL) &&
4786                           (!strcmp(session->mbox, item->item.path));
4787         if (selected_folder) {
4788                 if (!session->folder_content_changed) {
4789                         ok = imap_cmd_noop(session);
4790                         if (ok != MAILIMAP_NO_ERROR) {
4791                                 debug_print("disconnected!\n");
4792                                 if (!is_fatal(ok))
4793                                         session = imap_reconnect_if_possible(folder, session);
4794                                 else
4795                                         session = imap_session_get(folder);
4796                                 if (session == NULL)
4797                                         return FALSE;
4798                         }
4799
4800                         if (session->folder_content_changed) {
4801                                 debug_print("CHANGED (self-noop)! scan_required\n");
4802                                 item->should_update = TRUE;
4803                                 if (session->uid_validity && session->uid_validity != item->item.mtime) {
4804                                         item->item.mtime = session->uid_validity;
4805                                         item->should_trash_cache = TRUE;
4806                                 }
4807                                 unlock_session(session);
4808                                 return TRUE;
4809                         }
4810                 } else {
4811                         debug_print("CHANGED (previous noop)! scan_required\n");
4812                         item->should_update = TRUE;
4813                         if (session->uid_validity && session->uid_validity != item->item.mtime) {
4814                                 item->item.mtime = session->uid_validity;
4815                                 item->should_trash_cache = TRUE;
4816                         }
4817                         unlock_session(session);
4818                         return TRUE;
4819                 }
4820         } else {
4821                 ok = imap_status(session, IMAP_FOLDER(folder), item->item.path, IMAP_FOLDER_ITEM(item),
4822                                  &exists, &uid_next, &uid_val, &unseen, FALSE);
4823                 if (ok != MAILIMAP_NO_ERROR) {
4824                         return FALSE;
4825                 }
4826
4827                 debug_print("exists %d, item->item.total_msgs %d\n"
4828                             "\tunseen %d, item->item.unread_msgs %d\n"
4829                             "\tuid_next %d, item->uid_next %d\n"
4830                             "\tuid_val %d, item->item.mtime %ld\n",
4831                             exists, item->item.total_msgs, unseen, item->item.unread_msgs,
4832                             uid_next, item->uid_next, uid_val, (long)(item->item.mtime));
4833                 if (exists != item->item.total_msgs
4834                     || unseen != item->item.unread_msgs
4835                     || uid_next != item->uid_next
4836                     || uid_val != item->item.mtime) {
4837                         debug_print("CHANGED (status)! scan_required\n");
4838                         item->last_change = time(NULL);
4839                         item->should_update = TRUE;
4840                         item->uid_next = uid_next;
4841                         if (uid_val != item->item.mtime) {
4842                                 item->item.mtime = uid_val;
4843                                 item->should_trash_cache = TRUE;
4844                         }
4845                         unlock_session(session);
4846                         return TRUE;
4847                 }
4848         }
4849         unlock_session(session);
4850
4851         item->should_update = FALSE;
4852         return FALSE;
4853 }
4854
4855 void imap_change_flags(Folder *folder, FolderItem *item, MsgInfo *msginfo, MsgPermFlags newflags)
4856 {
4857         IMAPSession *session;
4858         IMAPFlags flags_set = 0, flags_unset = 0;
4859         gint ok = MAILIMAP_NO_ERROR;
4860         MsgNumberList numlist;
4861         hashtable_data *ht_data = NULL;
4862
4863         g_return_if_fail(folder != NULL);
4864         g_return_if_fail(folder->klass == &imap_class);
4865         g_return_if_fail(item != NULL);
4866         g_return_if_fail(item->folder == folder);
4867         g_return_if_fail(msginfo != NULL);
4868         g_return_if_fail(msginfo->folder == item);
4869
4870         if (!MSG_IS_MARKED(msginfo->flags) &&  (newflags & MSG_MARKED))
4871                 flags_set |= IMAP_FLAG_FLAGGED;
4872         if ( MSG_IS_MARKED(msginfo->flags) && !(newflags & MSG_MARKED))
4873                 flags_unset |= IMAP_FLAG_FLAGGED;
4874
4875         if (!MSG_IS_UNREAD(msginfo->flags) &&  (newflags & MSG_UNREAD))
4876                 flags_unset |= IMAP_FLAG_SEEN;
4877         if ( MSG_IS_UNREAD(msginfo->flags) && !(newflags & MSG_UNREAD))
4878                 flags_set |= IMAP_FLAG_SEEN;
4879
4880         if (!MSG_IS_REPLIED(msginfo->flags) &&  (newflags & MSG_REPLIED))
4881                 flags_set |= IMAP_FLAG_ANSWERED;
4882         if ( MSG_IS_REPLIED(msginfo->flags) && !(newflags & MSG_REPLIED))
4883                 flags_unset |= IMAP_FLAG_ANSWERED;
4884
4885         if (!MSG_IS_FORWARDED(msginfo->flags) &&  (newflags & MSG_FORWARDED))
4886                 flags_set |= IMAP_FLAG_FORWARDED;
4887         if ( MSG_IS_FORWARDED(msginfo->flags) && !(newflags & MSG_FORWARDED))
4888                 flags_unset |= IMAP_FLAG_FORWARDED;
4889
4890         if (!MSG_IS_SPAM(msginfo->flags) &&  (newflags & MSG_SPAM)) {
4891                 flags_set |= IMAP_FLAG_SPAM;
4892                 flags_unset |= IMAP_FLAG_HAM;
4893         }
4894         if ( MSG_IS_SPAM(msginfo->flags) && !(newflags & MSG_SPAM)) {
4895                 flags_set |= IMAP_FLAG_HAM;
4896                 flags_unset |= IMAP_FLAG_SPAM;
4897         }
4898         if (!MSG_IS_DELETED(msginfo->flags) &&  (newflags & MSG_DELETED))
4899                 flags_set |= IMAP_FLAG_DELETED;
4900         if ( MSG_IS_DELETED(msginfo->flags) && !(newflags & MSG_DELETED))
4901                 flags_unset |= IMAP_FLAG_DELETED;
4902
4903         if (!flags_set && !flags_unset) {
4904                 /* the changed flags were not translatable to IMAP-speak.
4905                  * like MSG_POSTFILTERED, so just apply. */
4906                 msginfo->flags.perm_flags = newflags;
4907                 return;
4908         }
4909
4910         debug_print("getting session...\n");
4911         session = imap_session_get(folder);
4912         if (!session) {
4913                 return;
4914         }
4915
4916         if ((ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
4917             NULL, NULL, NULL, NULL, NULL, FALSE)) != MAILIMAP_NO_ERROR) {
4918                 return;
4919         }
4920         numlist.next = NULL;
4921         numlist.data = GINT_TO_POINTER(msginfo->msgnum);
4922
4923         if (IMAP_FOLDER_ITEM(item)->batching) {
4924                 /* instead of performing an UID STORE command for each message change,
4925                  * as a lot of them can change "together", we just fill in hashtables
4926                  * and defer the treatment so that we're able to send only one
4927                  * command.
4928                  */
4929                 debug_print("IMAP batch mode on, deferring flags change\n");
4930                 if (flags_set) {
4931                         ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->flags_set_table,
4932                                 GINT_TO_POINTER(flags_set));
4933                         if (ht_data == NULL) {
4934                                 ht_data = g_new0(hashtable_data, 1);
4935                                 ht_data->item = IMAP_FOLDER_ITEM(item);
4936                                 g_hash_table_insert(IMAP_FOLDER_ITEM(item)->flags_set_table,
4937                                         GINT_TO_POINTER(flags_set), ht_data);
4938                         }
4939                         ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
4940                 }
4941                 if (flags_unset) {
4942                         ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->flags_unset_table,
4943                                 GINT_TO_POINTER(flags_unset));
4944                         if (ht_data == NULL) {
4945                                 ht_data = g_new0(hashtable_data, 1);
4946                                 ht_data->item = IMAP_FOLDER_ITEM(item);
4947                                 g_hash_table_insert(IMAP_FOLDER_ITEM(item)->flags_unset_table,
4948                                         GINT_TO_POINTER(flags_unset), ht_data);
4949                         }
4950                         ht_data->msglist = g_slist_prepend(ht_data->msglist,
4951                                         GINT_TO_POINTER(msginfo->msgnum));
4952                 }
4953         } else {
4954                 debug_print("IMAP changing flags\n");
4955                 if (flags_set) {
4956                         ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item), &numlist, flags_set, NULL, TRUE);
4957                         if (ok != MAILIMAP_NO_ERROR) {
4958                                 return;
4959                         }
4960                 }
4961
4962                 if (flags_unset) {
4963                         ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item), &numlist, flags_unset, NULL, FALSE);
4964                         if (ok != MAILIMAP_NO_ERROR) {
4965                                 return;
4966                         }
4967                 }
4968         }
4969         msginfo->flags.perm_flags = newflags;
4970         return;
4971 }
4972
4973 static gint imap_remove_msg(Folder *folder, FolderItem *item, gint uid)
4974 {
4975         gint ok;
4976         IMAPSession *session;
4977         gchar *dir;
4978         MsgNumberList numlist;
4979
4980         g_return_val_if_fail(folder != NULL, -1);
4981         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
4982         g_return_val_if_fail(item != NULL, -1);
4983
4984         debug_print("getting session...\n");
4985         session = imap_session_get(folder);
4986         if (!session) return -1;
4987
4988         ok = imap_select(session, IMAP_FOLDER(folder), item,
4989                          NULL, NULL, NULL, NULL, NULL, FALSE);
4990         if (ok != MAILIMAP_NO_ERROR) {
4991                 return ok;
4992         }
4993         numlist.next = NULL;
4994         numlist.data = GINT_TO_POINTER(uid);
4995
4996         ok = imap_set_message_flags
4997                 (session, IMAP_FOLDER_ITEM(item), &numlist, IMAP_FLAG_DELETED, NULL, TRUE);
4998         if (ok != MAILIMAP_NO_ERROR) {
4999                 log_warning(LOG_PROTOCOL, _("can't set deleted flags: %d\n"), uid);
5000                 return ok;
5001         }
5002
5003         ok = imap_cmd_expunge(session, folder->account->imap_use_trash);
5004
5005         if (ok != MAILIMAP_NO_ERROR) {
5006                 log_warning(LOG_PROTOCOL, _("can't expunge\n"));
5007                 return ok;
5008         }
5009
5010         IMAP_FOLDER_ITEM(item)->uid_list = g_slist_remove(
5011             IMAP_FOLDER_ITEM(item)->uid_list, numlist.data);
5012         dir = folder_item_get_path(item);
5013         if (is_dir_exist(dir))
5014                 remove_numbered_files(dir, uid, uid);
5015         g_free(dir);
5016         return MAILIMAP_NO_ERROR;
5017 }
5018
5019 static gint compare_msginfo(gconstpointer a, gconstpointer b)
5020 {
5021         return ((MsgInfo *)a)->msgnum - ((MsgInfo *)b)->msgnum;
5022 }
5023
5024 static guint gslist_find_next_num(MsgNumberList **list, guint num)
5025 {
5026         GSList *elem;
5027
5028         g_return_val_if_fail(list != NULL, -1);
5029
5030         for (elem = *list; elem != NULL; elem = g_slist_next(elem))
5031                 if (GPOINTER_TO_INT(elem->data) >= num)
5032                         break;
5033         *list = elem;
5034         return elem != NULL ? GPOINTER_TO_INT(elem->data) : (gint)-1;
5035 }
5036
5037 static gboolean flag_ok(IMAPFolderItem *item, guint flag)
5038 {
5039         if (item->ok_flags && g_slist_find(item->ok_flags, GUINT_TO_POINTER(flag))) {
5040                 debug_print("flag %d is OK\n", flag);
5041                 return TRUE;
5042         }
5043         if (item->can_create_flags == ITEM_CAN_CREATE_FLAGS) {
5044                 debug_print("creating flags is OK\n");
5045                 return TRUE;
5046         }
5047         return FALSE;
5048 }
5049
5050 /*
5051  * NEW and DELETED flags are not syncronized
5052  * - The NEW/RECENT flags in IMAP folders can not really be directly
5053  *   modified by Sylpheed
5054  * - The DELETE/DELETED flag in IMAP and Sylpheed don't have the same
5055  *   meaning, in IMAP it always removes the messages from the FolderItem
5056  *   in Sylpheed it can mean to move the message to trash
5057  */
5058
5059 typedef struct _get_flags_data {
5060         Folder *folder;
5061         FolderItem *item;
5062         MsgInfoList *msginfo_list;
5063         GHashTable *msgflags;
5064         gboolean full_search;
5065         gboolean done;
5066 } get_flags_data;
5067
5068 static /*gint*/ void *imap_get_flags_thread(void *data)
5069 {
5070         get_flags_data *stuff = (get_flags_data *)data;
5071         Folder *folder = stuff->folder;
5072         FolderItem *fitem = (FolderItem *) stuff->item;
5073         MsgInfoList *msginfo_list = stuff->msginfo_list;
5074         GHashTable *msgflags = stuff->msgflags;
5075         GSList *elem;
5076         carray * lep_uidtab;
5077         IMAPSession *session;
5078         gint ok;
5079         int r = MAILIMAP_NO_ERROR;
5080         GHashTable *flags_hash = NULL;
5081         GHashTable *tags_hash = NULL;
5082         gboolean full_search = stuff->full_search;
5083         GSList *sorted_list = NULL;
5084         GSList *unseen = NULL, *answered = NULL, *flagged = NULL, *deleted = NULL, *forwarded = NULL, *spam = NULL;
5085         GSList *seq_list, *cur;
5086         gboolean reverse_seen = FALSE;
5087         gboolean selected_folder;
5088         gint exists_cnt, unseen_cnt;
5089         gboolean got_alien_tags = FALSE;
5090
5091         session = imap_session_get(folder);
5092
5093         if (session == NULL) {
5094                 stuff->done = TRUE;
5095                 return GINT_TO_POINTER(-1);
5096         }
5097         selected_folder = (session->mbox != NULL) &&
5098                           (!strcmp(session->mbox, fitem->path));
5099
5100         lock_session(session);
5101         if (!selected_folder) {
5102                 ok = imap_select(session, IMAP_FOLDER(folder), fitem,
5103                         &exists_cnt, NULL, &unseen_cnt, NULL, NULL, TRUE);
5104                 if (ok != MAILIMAP_NO_ERROR) {
5105                         stuff->done = TRUE;
5106                         return GINT_TO_POINTER(-1);
5107                 }
5108
5109                 if (unseen_cnt > exists_cnt / 2)
5110                         reverse_seen = TRUE;
5111         }
5112         else {
5113                 if (fitem->unread_msgs > fitem->total_msgs / 2)
5114                         reverse_seen = TRUE;
5115         }
5116
5117         sorted_list = g_slist_sort(g_slist_copy(msginfo_list), compare_msginfo);
5118         if (!full_search) {
5119                 seq_list = imap_get_lep_set_from_msglist(IMAP_FOLDER(folder), msginfo_list);
5120         } else {
5121                 struct mailimap_set * set;
5122                 set = mailimap_set_new_interval(1, 0);
5123                 seq_list = g_slist_append(NULL, set);
5124         }
5125
5126         if (folder->account && folder->account->low_bandwidth) {
5127                 for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
5128                         struct mailimap_set * imapset;
5129                         clist * lep_uidlist;
5130                         int r;
5131
5132                         imapset = cur->data;
5133                         if (reverse_seen) {
5134                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SEEN, NULL,
5135                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5136                         }
5137                         else {
5138                                 r = imap_threaded_search(folder,
5139                                                          IMAP_SEARCH_TYPE_UNSEEN, NULL,
5140                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5141                         }
5142                         if (r == MAILIMAP_NO_ERROR) {
5143                                 GSList * uidlist;
5144
5145                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5146                                 mailimap_search_result_free(lep_uidlist);
5147
5148                                 unseen = g_slist_concat(unseen, uidlist);
5149                         } else {
5150                                 imap_handle_error(SESSION(session), NULL, r);
5151                                 goto bail;
5152                         }
5153
5154                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_FLAGGED, NULL,
5155                                                  NULL, full_search ? NULL:imapset, &lep_uidlist);
5156                         if (r == MAILIMAP_NO_ERROR) {
5157                                 GSList * uidlist;
5158
5159                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5160                                 mailimap_search_result_free(lep_uidlist);
5161
5162                                 flagged = g_slist_concat(flagged, uidlist);
5163                         } else {
5164                                 imap_handle_error(SESSION(session), NULL, r);
5165                                 goto bail;
5166                         }
5167
5168                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
5169                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_ANSWERED, NULL,
5170                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5171                                 if (r == MAILIMAP_NO_ERROR) {
5172                                         GSList * uidlist;
5173
5174                                         uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5175                                         mailimap_search_result_free(lep_uidlist);
5176
5177                                         answered = g_slist_concat(answered, uidlist);
5178                                 } else {
5179                                         imap_handle_error(SESSION(session), NULL, r);
5180                                         goto bail;
5181                                 }
5182
5183                                 if (flag_ok(IMAP_FOLDER_ITEM(fitem), IMAP_FLAG_FORWARDED)) {
5184                                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_FORWARDED, NULL,
5185                                                                  NULL, full_search ? NULL:imapset, &lep_uidlist);
5186                                         if (r == MAILIMAP_NO_ERROR) {
5187                                                 GSList * uidlist;
5188
5189                                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5190                                                 mailimap_search_result_free(lep_uidlist);
5191
5192                                                 forwarded = g_slist_concat(forwarded, uidlist);
5193                                         } else {
5194                                                 imap_handle_error(SESSION(session), NULL, r);
5195                                                 goto bail;
5196                                         }
5197                                 }
5198
5199                                 if (flag_ok(IMAP_FOLDER_ITEM(fitem), IMAP_FLAG_SPAM)) {
5200                                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SPAM, NULL,
5201                                                                  NULL, full_search ? NULL:imapset, &lep_uidlist);
5202                                         if (r == MAILIMAP_NO_ERROR) {
5203                                                 GSList * uidlist;
5204
5205                                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5206                                                 mailimap_search_result_free(lep_uidlist);
5207
5208                                                 spam = g_slist_concat(spam, uidlist);
5209                                         } else {
5210                                                 imap_handle_error(SESSION(session), NULL, r);
5211                                                 goto bail;
5212                                         }
5213                                 }
5214
5215                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_DELETED, NULL,
5216                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5217                                 if (r == MAILIMAP_NO_ERROR) {
5218                                         GSList * uidlist;
5219
5220                                         uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5221                                         mailimap_search_result_free(lep_uidlist);
5222
5223                                         deleted = g_slist_concat(deleted, uidlist);
5224                                 } else {
5225                                         imap_handle_error(SESSION(session), NULL, r);
5226                                         goto bail;
5227                                 }
5228                         }
5229                 }
5230
5231         } else {
5232                 r = imap_threaded_fetch_uid_flags(folder, 1, &lep_uidtab);
5233                 if (r == MAILIMAP_NO_ERROR) {
5234                         flags_hash = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, NULL);
5235                         tags_hash = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, NULL);
5236                         imap_flags_hash_from_lep_uid_flags_tab(lep_uidtab, flags_hash, tags_hash);
5237                         imap_fetch_uid_flags_list_free(lep_uidtab);
5238                 } else {
5239                         imap_handle_error(SESSION(session), NULL, r);
5240                         goto bail;
5241                 }
5242         }
5243
5244 bail:
5245         if (r == MAILIMAP_NO_ERROR)
5246                 unlock_session(session);
5247
5248         for (elem = sorted_list; elem != NULL; elem = g_slist_next(elem)) {
5249                 MsgInfo *msginfo;
5250                 MsgPermFlags flags, oldflags;
5251                 gboolean wasnew;
5252
5253                 msginfo = (MsgInfo *) elem->data;
5254                 flags = msginfo->flags.perm_flags;
5255                 wasnew = (flags & MSG_NEW);
5256                 oldflags = flags & ~(MSG_NEW|MSG_UNREAD|MSG_REPLIED|MSG_FORWARDED|MSG_MARKED|MSG_DELETED|MSG_SPAM);
5257
5258                 if (folder->account && folder->account->low_bandwidth) {
5259                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
5260                                 flags &= ~((reverse_seen ? 0 : MSG_UNREAD | MSG_NEW) | MSG_REPLIED | MSG_FORWARDED | MSG_MARKED | MSG_SPAM);
5261                         } else {
5262                                 flags &= ~((reverse_seen ? 0 : MSG_UNREAD | MSG_NEW | MSG_MARKED));
5263                         }
5264                         if (reverse_seen)
5265                                 flags |= MSG_UNREAD | (wasnew ? MSG_NEW : 0);
5266                         if (gslist_find_next_num(&unseen, msginfo->msgnum) == msginfo->msgnum) {
5267                                 if (!reverse_seen) {
5268                                         flags |= MSG_UNREAD | (wasnew ? MSG_NEW : 0);
5269                                 } else {
5270                                         flags &= ~(MSG_UNREAD | MSG_NEW);
5271                                 }
5272                         }
5273
5274                         if (gslist_find_next_num(&flagged, msginfo->msgnum) == msginfo->msgnum)
5275                                 flags |= MSG_MARKED;
5276                         else
5277                                 flags &= ~MSG_MARKED;
5278
5279                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
5280                                 if (gslist_find_next_num(&answered, msginfo->msgnum) == msginfo->msgnum)
5281                                         flags |= MSG_REPLIED;
5282                                 else
5283                                         flags &= ~MSG_REPLIED;
5284                                 if (gslist_find_next_num(&forwarded, msginfo->msgnum) == msginfo->msgnum)
5285                                         flags |= MSG_FORWARDED;
5286                                 else
5287                                         flags &= ~MSG_FORWARDED;
5288                                 if (gslist_find_next_num(&spam, msginfo->msgnum) == msginfo->msgnum)
5289                                         flags |= MSG_SPAM;
5290                                 else
5291                                         flags &= ~MSG_SPAM;
5292                                 if (gslist_find_next_num(&deleted, msginfo->msgnum) == msginfo->msgnum)
5293                                         flags |= MSG_DELETED;
5294                                 else
5295                                         flags &= ~MSG_DELETED;
5296                         }
5297                 } else {
5298                         if (flags_hash != NULL) {
5299
5300                                 flags = GPOINTER_TO_INT(g_hash_table_lookup(flags_hash,
5301                                                 GINT_TO_POINTER(msginfo->msgnum)));
5302                         }
5303
5304                         if ((flags & MSG_UNREAD) == 0)
5305                                 flags &= ~MSG_NEW;
5306                         else if (wasnew)
5307                                 flags |= MSG_NEW;
5308                         flags |= oldflags;
5309
5310                         if (tags_hash != NULL) {
5311                                 GSList *tags = g_hash_table_lookup(tags_hash, GINT_TO_POINTER(msginfo->msgnum));
5312                                 GSList *cur;
5313
5314                                 g_slist_free(msginfo->tags);
5315                                 msginfo->tags = NULL;
5316
5317                                 for (cur = tags; cur; cur = cur->next) {
5318                                         gchar *real_tag = imap_modified_utf7_to_utf8(cur->data, TRUE);
5319                                         gint id = 0;
5320                                         id = tags_get_id_for_str(real_tag);
5321                                         if (id == -1) {
5322                                                 id = tags_add_tag(real_tag);
5323                                                 got_alien_tags = TRUE;
5324                                         }
5325                                         msginfo->tags = g_slist_append(
5326                                                                 msginfo->tags,
5327                                                                 GINT_TO_POINTER(id));
5328                                         g_free(real_tag);
5329                                 }
5330                                 slist_free_strings_full(tags);
5331                         }
5332                 }
5333
5334                 g_hash_table_insert(msgflags, msginfo, GINT_TO_POINTER(flags));
5335         }
5336
5337         if (got_alien_tags) {
5338                 tags_write_tags();
5339                 main_window_reflect_tags_changes(mainwindow_get_mainwindow());
5340         }
5341
5342         if (flags_hash)
5343                 g_hash_table_destroy(flags_hash);
5344         if (tags_hash)
5345                 g_hash_table_destroy(tags_hash);
5346
5347         imap_lep_set_free(seq_list);
5348         g_slist_free(flagged);
5349         g_slist_free(deleted);
5350         g_slist_free(answered);
5351         g_slist_free(forwarded);
5352         g_slist_free(spam);
5353         g_slist_free(unseen);
5354         g_slist_free(sorted_list);
5355
5356         stuff->done = TRUE;
5357         return GINT_TO_POINTER(0);
5358 }
5359
5360 static gint imap_get_flags(Folder *folder, FolderItem *item,
5361                            MsgInfoList *msginfo_list, GHashTable *msgflags)
5362 {
5363         gint result;
5364         get_flags_data *data = g_new0(get_flags_data, 1);
5365         data->done = FALSE;
5366         data->folder = folder;
5367         data->item = item;
5368         data->msginfo_list = msginfo_list;
5369         data->msgflags = msgflags;
5370         data->full_search = FALSE;
5371
5372         GSList *tmp = NULL, *cur;
5373
5374         if (prefs_common.work_offline &&
5375             !inc_offline_should_override(FALSE,
5376                 _("Claws Mail needs network access in order "
5377                   "to access the IMAP server."))) {
5378                 g_free(data);
5379                 return -1;
5380         }
5381
5382         tmp = folder_item_get_msg_list(item);
5383
5384         if (g_slist_length(tmp) <= g_slist_length(msginfo_list))
5385                 data->full_search = TRUE;
5386
5387         for (cur = tmp; cur; cur = cur->next)
5388                 procmsg_msginfo_free((MsgInfo *)cur->data);
5389
5390         g_slist_free(tmp);
5391
5392         result = GPOINTER_TO_INT(imap_get_flags_thread(data));
5393
5394         g_free(data);
5395         return result;
5396
5397 }
5398
5399 static gboolean process_flags(gpointer key, gpointer value, gpointer user_data)
5400 {
5401         gboolean flags_set = GPOINTER_TO_INT(user_data);
5402         gint flags_value = GPOINTER_TO_INT(key);
5403         hashtable_data *data = (hashtable_data *)value;
5404         IMAPFolderItem *_item = data->item;
5405         FolderItem *item = (FolderItem *)_item;
5406         gint ok = MAILIMAP_ERROR_BAD_STATE;
5407         IMAPSession *session = NULL;
5408
5409         debug_print("getting session...\n");
5410         session = imap_session_get(item->folder);
5411
5412         data->msglist = g_slist_reverse(data->msglist);
5413
5414         debug_print("IMAP %ssetting flags to %d for %d messages\n",
5415                 flags_set?"":"un",
5416                 flags_value,
5417                 g_slist_length(data->msglist));
5418
5419         lock_session(session);
5420         if (session) {
5421                 ok = imap_select(session, IMAP_FOLDER(item->folder), item,
5422                          NULL, NULL, NULL, NULL, NULL, FALSE);
5423         }
5424         if (ok == MAILIMAP_NO_ERROR) {
5425                 ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item),
5426                         data->msglist, flags_value, NULL, flags_set);
5427         } else {
5428                 g_warning("can't select mailbox %s\n", item->path);
5429         }
5430
5431         if (!is_fatal(ok))
5432                 unlock_session(session);
5433
5434         g_slist_free(data->msglist);
5435         g_free(data);
5436         return TRUE;
5437 }
5438
5439 static gboolean process_tags(gpointer key, gpointer value, gpointer user_data)
5440 {
5441         gboolean tags_set = GPOINTER_TO_INT(user_data);
5442         TagsData *data = (TagsData *)value;
5443         IMAPFolderItem *_item = data->item;
5444         FolderItem *item = (FolderItem *)_item;
5445         gchar *str = data->str;
5446         gint ok = MAILIMAP_ERROR_BAD_STATE;
5447         IMAPSession *session = NULL;
5448
5449         debug_print("getting session...\n");
5450         session = imap_session_get(item->folder);
5451
5452         data->msglist = g_slist_reverse(data->msglist);
5453
5454         debug_print("IMAP %ssetting tags %s for %d messages\n",
5455                 tags_set?"":"un",
5456                 str,
5457                 g_slist_length(data->msglist));
5458
5459         lock_session(session);
5460         if (session) {
5461                 ok = imap_select(session, IMAP_FOLDER(item->folder), item,
5462                          NULL, NULL, NULL, NULL, NULL, FALSE);
5463         }
5464         if (ok == MAILIMAP_NO_ERROR) {
5465                 GSList list;
5466                 list.data = str;
5467                 list.next = NULL;
5468                 ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item),
5469                         data->msglist, 0, &list, tags_set);
5470         } else {
5471                 g_warning("can't select mailbox %s\n", item->path);
5472         }
5473
5474         if (!is_fatal(ok))
5475                 unlock_session(session);
5476
5477         g_slist_free(data->msglist);
5478         g_free(data->str);
5479         g_free(data);
5480         return TRUE;
5481 }
5482
5483 static void process_hashtable(IMAPFolderItem *item)
5484 {
5485         if (item->flags_set_table) {
5486                 g_hash_table_foreach_remove(item->flags_set_table, process_flags, GINT_TO_POINTER(TRUE));
5487                 g_hash_table_destroy(item->flags_set_table);
5488                 item->flags_set_table = NULL;
5489         }
5490         if (item->flags_unset_table) {
5491                 g_hash_table_foreach_remove(item->flags_unset_table, process_flags, GINT_TO_POINTER(FALSE));
5492                 g_hash_table_destroy(item->flags_unset_table);
5493                 item->flags_unset_table = NULL;
5494         }
5495         if (item->tags_set_table) {
5496                 g_hash_table_foreach_remove(item->tags_set_table, process_tags, GINT_TO_POINTER(TRUE));
5497                 g_hash_table_destroy(item->tags_set_table);
5498                 item->tags_set_table = NULL;
5499         }
5500         if (item->tags_unset_table) {
5501                 g_hash_table_foreach_remove(item->tags_unset_table, process_tags, GINT_TO_POINTER(FALSE));
5502                 g_hash_table_destroy(item->tags_unset_table);
5503                 item->tags_unset_table = NULL;
5504         }
5505
5506 }
5507
5508 static void imap_set_batch (Folder *folder, FolderItem *_item, gboolean batch)
5509 {
5510         IMAPFolderItem *item = (IMAPFolderItem *)_item;
5511         IMAPSession *session;
5512
5513         g_return_if_fail(item != NULL);
5514
5515         if (item->batching == batch)
5516                 return;
5517
5518         if (batch) {
5519                 item->batching = TRUE;
5520                 debug_print("IMAP switching to batch mode\n");
5521                 if (!item->flags_set_table) {
5522                         item->flags_set_table = g_hash_table_new(NULL, g_direct_equal);
5523                 }
5524                 if (!item->flags_unset_table) {
5525                         item->flags_unset_table = g_hash_table_new(NULL, g_direct_equal);
5526                 }
5527                 if (!item->tags_set_table) {
5528                         item->tags_set_table = g_hash_table_new(NULL, g_direct_equal);
5529                 }
5530                 if (!item->tags_unset_table) {
5531                         item->tags_unset_table = g_hash_table_new(NULL, g_direct_equal);
5532                 }
5533                 session = imap_session_get(folder);
5534                 if (session) {
5535                         imap_refresh_sensitivity(session);
5536                         session->sens_update_block = TRUE;
5537                 }
5538         } else {
5539                 debug_print("IMAP switching away from batch mode\n");
5540                 /* process stuff */
5541                 process_hashtable(item);
5542                 item->batching = FALSE;
5543                 session = imap_session_get(folder);
5544                 if (session) {
5545                         session->sens_update_block = FALSE;
5546                         imap_refresh_sensitivity(session);
5547                 }
5548         }
5549 }
5550
5551
5552
5553 /* data types conversion libetpan <-> claws */
5554
5555
5556
5557 #define ETPAN_IMAP_MB_MARKED      1
5558 #define ETPAN_IMAP_MB_UNMARKED    2
5559 #define ETPAN_IMAP_MB_NOSELECT    4
5560 #define ETPAN_IMAP_MB_NOINFERIORS 8
5561
5562 static int imap_flags_to_flags(struct mailimap_mbx_list_flags * imap_flags)
5563 {
5564   int flags;
5565   clistiter * cur;
5566
5567   flags = 0;
5568   if (imap_flags->mbf_type == MAILIMAP_MBX_LIST_FLAGS_SFLAG) {
5569     switch (imap_flags->mbf_sflag) {
5570     case MAILIMAP_MBX_LIST_SFLAG_MARKED:
5571       flags |= ETPAN_IMAP_MB_MARKED;
5572       break;
5573     case MAILIMAP_MBX_LIST_SFLAG_NOSELECT:
5574       flags |= ETPAN_IMAP_MB_NOSELECT;
5575       break;
5576     case MAILIMAP_MBX_LIST_SFLAG_UNMARKED:
5577       flags |= ETPAN_IMAP_MB_UNMARKED;
5578       break;
5579     }
5580   }
5581
5582   if (imap_flags->mbf_oflags) {
5583     for(cur = clist_begin(imap_flags->mbf_oflags) ; cur != NULL ;
5584         cur = clist_next(cur)) {
5585       struct mailimap_mbx_list_oflag * oflag;
5586
5587       oflag = clist_content(cur);
5588
5589       switch (oflag->of_type) {
5590       case MAILIMAP_MBX_LIST_OFLAG_NOINFERIORS:
5591         flags |= ETPAN_IMAP_MB_NOINFERIORS;
5592         break;
5593       }
5594     }
5595   }
5596   return flags;
5597 }
5598
5599 static GSList * imap_list_from_lep(IMAPFolder * folder,
5600                                    clist * list, const gchar * real_path, gboolean all)
5601 {
5602         clistiter * iter;
5603         GSList * item_list = NULL, *llast = NULL;
5604
5605         if (list) {
5606                 for(iter = clist_begin(list) ; iter != NULL ;
5607                     iter = clist_next(iter)) {
5608                         struct mailimap_mailbox_list * mb;
5609                         int flags;
5610                         char delimiter;
5611                         char * name;
5612                         char * dup_name;
5613                         gchar * base;
5614                         gchar * loc_name;
5615                         gchar * loc_path;
5616                         FolderItem *new_item;
5617
5618                         mb = clist_content(iter);
5619
5620                         if (mb == NULL)
5621                                 continue;
5622
5623                         flags = 0;
5624                         if (mb->mb_flag != NULL)
5625                                 flags = imap_flags_to_flags(mb->mb_flag);
5626
5627                         delimiter = mb->mb_delimiter;
5628                         name = mb->mb_name;
5629
5630                         dup_name = strdup(name);
5631                         if (delimiter != '\0')
5632                                 subst_char(dup_name, delimiter, '/');
5633
5634                         base = g_path_get_basename(dup_name);
5635                         if (base[0] == '.') {
5636                                 g_free(base);
5637                                 free(dup_name);
5638                                 continue;
5639                         }
5640                         if (!all && path_cmp(name, real_path) == 0) {
5641                                 g_free(base);
5642                                 free(dup_name);
5643                                 continue;
5644                         }
5645
5646                         if (!all && dup_name[strlen(dup_name)-1] == '/') {
5647                                 dup_name[strlen(dup_name)-1] = '\0';
5648                         }
5649
5650                         loc_name = imap_modified_utf7_to_utf8(base, FALSE);
5651                         loc_path = imap_modified_utf7_to_utf8(dup_name, FALSE);
5652
5653                         new_item = folder_item_new(FOLDER(folder), loc_name, loc_path);
5654                         if ((flags & ETPAN_IMAP_MB_NOINFERIORS) != 0)
5655                                 new_item->no_sub = TRUE;
5656                         if (strcasecmp(dup_name, "INBOX") != 0 &&
5657                             ((flags & ETPAN_IMAP_MB_NOSELECT) != 0))
5658                                 new_item->no_select = TRUE;
5659
5660                         if (item_list == NULL)
5661                                 llast = item_list = g_slist_append(item_list, new_item);
5662                         else {
5663                                 llast = g_slist_append(llast, new_item);
5664                                 llast = llast->next;
5665                         }
5666                         debug_print("folder '%s' found.\n", loc_path);
5667                         g_free(base);
5668                         g_free(loc_path);
5669                         g_free(loc_name);
5670
5671                         free(dup_name);
5672                 }
5673         }
5674         return item_list;
5675 }
5676
5677 static GSList * imap_get_lep_set_from_numlist(IMAPFolder *folder, MsgNumberList *numlist)
5678 {
5679         GSList *sorted_list, *cur;
5680         guint first, last, next;
5681         GSList *ret_list = NULL, *llast = NULL;
5682         struct mailimap_set * current_set;
5683         unsigned int item_count;
5684
5685         if (numlist == NULL)
5686                 return NULL;
5687
5688         current_set = mailimap_set_new_empty();
5689
5690         sorted_list = g_slist_copy(numlist);
5691         sorted_list = g_slist_sort(sorted_list, g_int_compare);
5692
5693         first = GPOINTER_TO_INT(sorted_list->data);
5694
5695         item_count = 0;
5696         for (cur = sorted_list; cur != NULL; cur = g_slist_next(cur)) {
5697                 if (GPOINTER_TO_INT(cur->data) == 0)
5698                         continue;
5699
5700                 item_count ++;
5701
5702                 last = GPOINTER_TO_INT(cur->data);
5703                 if (cur->next)
5704                         next = GPOINTER_TO_INT(cur->next->data);
5705                 else
5706                         next = 0;
5707
5708                 if (last + 1 != next || next == 0 || item_count >= folder->max_set_size) {
5709
5710                         struct mailimap_set_item * item;
5711                         item = mailimap_set_item_new(first, last);
5712                         mailimap_set_add(current_set, item);
5713
5714                         first = next;
5715
5716                         if (item_count >= folder->max_set_size) {
5717                                 if (ret_list == NULL)
5718                                         llast = ret_list = g_slist_append(ret_list,
5719                                                           current_set);
5720                                 else {
5721                                         llast = g_slist_append(llast, current_set);
5722                                         llast = llast->next;
5723                                 }
5724
5725                                 current_set = mailimap_set_new_empty();
5726                                 item_count = 0;
5727                         }
5728                 }
5729         }
5730
5731         if (clist_count(current_set->set_list) > 0) {
5732                 ret_list = g_slist_append(ret_list,
5733                                           current_set);
5734         }
5735
5736         g_slist_free(sorted_list);
5737
5738         return ret_list;
5739 }
5740
5741 static GSList * imap_get_lep_set_from_msglist(IMAPFolder *folder, MsgInfoList *msglist)
5742 {
5743         MsgNumberList *numlist = NULL;
5744         GSList *seq_list;
5745
5746         numlist = procmsg_get_number_list_for_msgs(msglist);
5747
5748         seq_list = imap_get_lep_set_from_numlist(folder, numlist);
5749         g_slist_free(numlist);
5750
5751         return seq_list;
5752 }
5753
5754 static GSList * imap_uid_list_from_lep(clist * list, gint* length)
5755 {
5756         clistiter * iter;
5757         GSList * result;
5758         gint len = 0;
5759
5760         result = NULL;
5761
5762         if (list) {
5763                 for(iter = clist_begin(list) ; iter != NULL ;
5764                     iter = clist_next(iter)) {
5765                         uint32_t * puid;
5766
5767                         puid = clist_content(iter);
5768                         result = g_slist_prepend(result, GINT_TO_POINTER(* puid));
5769                         len++;
5770                 }
5771                 result = g_slist_reverse(result);
5772         }
5773         if (length)
5774                 *length = len;
5775         return result;
5776 }
5777
5778 static GSList * imap_uid_list_from_lep_tab(carray * list)
5779 {
5780         unsigned int i;
5781         GSList * result;
5782
5783         result = NULL;
5784
5785         for(i = 0 ; i < carray_count(list) ; i ++) {
5786                 uint32_t * puid;
5787
5788                 puid = carray_get(list, i);
5789                 result = g_slist_prepend(result, GINT_TO_POINTER(* puid));
5790         }
5791         result = g_slist_reverse(result);
5792         return result;
5793 }
5794
5795 static void imap_flags_hash_from_lep_uid_flags_tab(carray * list,
5796                                                    GHashTable * hash,
5797                                                    GHashTable * tags_hash)
5798 {
5799         unsigned int i;
5800
5801         for(i = 0 ; i < carray_count(list) ; i += 3) {
5802                 uint32_t * puid;
5803                 int * pflags;
5804                 GSList *tags;
5805
5806                 puid = carray_get(list, i);
5807                 pflags = carray_get(list, i + 1);
5808                 tags = carray_get(list, i + 2);
5809
5810                 g_hash_table_insert(hash, GINT_TO_POINTER(*puid), GINT_TO_POINTER(* pflags));
5811                 g_hash_table_insert(tags_hash, GINT_TO_POINTER(*puid), tags);
5812         }
5813 }
5814
5815 static MsgInfo *imap_envelope_from_lep(struct imap_fetch_env_info * info,
5816                                        FolderItem *item)
5817 {
5818         MsgInfo *msginfo = NULL;
5819         guint32 uid = 0;
5820         goffset size = 0;
5821         MsgFlags flags = {0, 0};
5822
5823         if (info->headers == NULL)
5824                 return NULL;
5825
5826         MSG_SET_TMP_FLAGS(flags, MSG_IMAP);
5827         if (folder_has_parent_of_type(item, F_QUEUE)) {
5828                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
5829         } else if (folder_has_parent_of_type(item, F_DRAFT)) {
5830                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
5831         }
5832         flags.perm_flags = info->flags;
5833
5834         uid = info->uid;
5835         size = (goffset) info->size;
5836         msginfo = procheader_parse_str(info->headers, flags, FALSE, FALSE);
5837
5838         if (msginfo) {
5839                 msginfo->msgnum = uid;
5840                 msginfo->size = size;
5841         }
5842
5843         return msginfo;
5844 }
5845
5846 static void imap_lep_set_free(GSList *seq_list)
5847 {
5848         GSList * cur;
5849
5850         for(cur = seq_list ; cur != NULL ; cur = g_slist_next(cur)) {
5851                 struct mailimap_set * imapset;
5852
5853                 imapset = cur->data;
5854                 mailimap_set_free(imapset);
5855         }
5856         g_slist_free(seq_list);
5857 }
5858
5859 static struct mailimap_flag_list * imap_flag_to_lep(IMAPFolderItem *item, IMAPFlags flags, GSList *tags)
5860 {
5861         struct mailimap_flag_list * flag_list;
5862         GSList *cur = tags;
5863
5864         flag_list = mailimap_flag_list_new_empty();
5865
5866         if (IMAP_IS_SEEN(flags))
5867                 mailimap_flag_list_add(flag_list,
5868                                        mailimap_flag_new_seen());
5869         if (IMAP_IS_ANSWERED(flags))
5870                 mailimap_flag_list_add(flag_list,
5871                                        mailimap_flag_new_answered());
5872         if (IMAP_IS_FLAGGED(flags))
5873                 mailimap_flag_list_add(flag_list,
5874                                        mailimap_flag_new_flagged());
5875         if (IMAP_IS_DELETED(flags))
5876                 mailimap_flag_list_add(flag_list,
5877                                        mailimap_flag_new_deleted());
5878         if (IMAP_IS_DRAFT(flags))
5879                 mailimap_flag_list_add(flag_list,
5880                                        mailimap_flag_new_draft());
5881         if (IMAP_IS_FORWARDED(flags) && flag_ok(item, IMAP_FLAG_FORWARDED))
5882                 mailimap_flag_list_add(flag_list,
5883                                        mailimap_flag_new_flag_keyword(strdup(RTAG_FORWARDED)));
5884         if (IMAP_IS_SPAM(flags) && flag_ok(item, IMAP_FLAG_SPAM))
5885                 mailimap_flag_list_add(flag_list,
5886                                        mailimap_flag_new_flag_keyword(strdup(RTAG_JUNK)));
5887         else if (IMAP_IS_HAM(flags) && flag_ok(item, IMAP_FLAG_HAM))
5888                 mailimap_flag_list_add(flag_list,
5889                                        mailimap_flag_new_flag_keyword(strdup(RTAG_NON_JUNK)));
5890
5891         for (; cur; cur = cur->next) {
5892                 gchar *enc_str =
5893                         imap_utf8_to_modified_utf7(cur->data, TRUE);
5894                 g_strstrip(enc_str);
5895
5896                 mailimap_flag_list_add(flag_list,
5897                         mailimap_flag_new_flag_keyword(enc_str));
5898         }
5899
5900         return flag_list;
5901 }
5902
5903 guint imap_folder_get_refcnt(Folder *folder)
5904 {
5905         return ((IMAPFolder *)folder)->refcnt;
5906 }
5907
5908 void imap_folder_ref(Folder *folder)
5909 {
5910         ((IMAPFolder *)folder)->refcnt++;
5911 }
5912
5913 void imap_disconnect_all(gboolean have_connectivity)
5914 {
5915         GList *list;
5916         gboolean short_timeout;
5917 #ifdef HAVE_NETWORKMANAGER_SUPPORT
5918         GError *error = NULL;
5919
5920         short_timeout = !networkmanager_is_online(&error);
5921         if(error) {
5922                 short_timeout = TRUE;
5923                 g_error_free(error);
5924         }
5925 #else
5926         short_timeout = TRUE;
5927 #endif
5928
5929         if(short_timeout)
5930                 imap_main_set_timeout(1);
5931
5932         for (list = account_get_list(); list != NULL; list = list->next) {
5933                 PrefsAccount *account = list->data;
5934                 if (account->protocol == A_IMAP4) {
5935                         RemoteFolder *folder = (RemoteFolder *)account->folder;
5936                         if (folder && folder->session) {
5937                                 if (imap_is_busy(FOLDER(folder)))
5938                                         imap_threaded_cancel(FOLDER(folder));
5939
5940                                 IMAPSession *session = (IMAPSession *)folder->session;
5941                                 if (have_connectivity)
5942                                         imap_threaded_disconnect(FOLDER(folder));
5943                                 SESSION(session)->state = SESSION_DISCONNECTED;
5944                                 SESSION(session)->sock = NULL;
5945                                 imap_safe_destroy(session);
5946                                 folder->session = NULL;
5947                         }
5948                 }
5949         }
5950
5951         if(short_timeout)
5952                 imap_main_set_timeout(prefs_common.io_timeout_secs);
5953 }
5954
5955 void imap_folder_unref(Folder *folder)
5956 {
5957         if (((IMAPFolder *)folder)->refcnt > 0)
5958                 ((IMAPFolder *)folder)->refcnt--;
5959 }
5960
5961 void imap_cancel_all(void)
5962 {
5963         GList *folderlist;
5964         GList *cur;
5965
5966         folderlist = folder_get_list();
5967         for (cur = folderlist; cur != NULL; cur = g_list_next(cur)) {
5968                 Folder *folder = (Folder *) cur->data;
5969
5970                 if (folder->klass == &imap_class) {
5971                         if (imap_is_busy(folder)) {
5972                                 IMAPSession *imap_session;
5973                                 RemoteFolder *rfolder;
5974
5975                                 g_printerr("cancelled\n");
5976                                 imap_threaded_cancel(folder);
5977                                 rfolder = (RemoteFolder *) folder;
5978                                 imap_session = (IMAPSession *) rfolder->session;
5979                                 if (imap_session)
5980                                         imap_session->cancelled = 1;
5981                         }
5982                 }
5983         }
5984 }
5985
5986 gboolean imap_cancel_all_enabled(void)
5987 {
5988         GList *folderlist;
5989         GList *cur;
5990
5991         folderlist = folder_get_list();
5992         for (cur = folderlist; cur != NULL; cur = g_list_next(cur)) {
5993                 Folder *folder = (Folder *) cur->data;
5994
5995                 if (folder->klass == &imap_class) {
5996                         if (imap_is_busy(folder)) {
5997                                 return TRUE;
5998                         }
5999                 }
6000         }
6001
6002         return FALSE;
6003 }
6004
6005 static gboolean imap_is_busy(Folder *folder)
6006 {
6007         IMAPSession *imap_session;
6008         RemoteFolder *rfolder;
6009
6010         rfolder = (RemoteFolder *) folder;
6011         imap_session = (IMAPSession *) rfolder->session;
6012         if (imap_session == NULL)
6013                 return FALSE;
6014
6015         return imap_session->busy;
6016 }
6017
6018 #else /* HAVE_LIBETPAN */
6019
6020 static FolderClass imap_class;
6021
6022 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item);
6023 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag);
6024
6025 static Folder   *imap_folder_new        (const gchar    *name,
6026                                          const gchar    *path)
6027 {
6028         static gboolean missing_imap_warning = TRUE;
6029         if (missing_imap_warning) {
6030                 missing_imap_warning = FALSE;
6031                 alertpanel_error(
6032                         _("You have one or more IMAP accounts "
6033                           "defined. However this version of "
6034                           "Claws Mail has been built without "
6035                           "IMAP support; your IMAP account(s) are "
6036                           "disabled.\n\n"
6037                           "You probably need to "
6038                           "install libetpan and recompile "
6039                           "Claws Mail."));
6040         }
6041         return NULL;
6042 }
6043 static gint     imap_create_tree        (Folder         *folder)
6044 {
6045         return -1;
6046 }
6047 static FolderItem *imap_create_folder   (Folder         *folder,
6048                                          FolderItem     *parent,
6049                                          const gchar    *name)
6050 {
6051         return NULL;
6052 }
6053 static gint     imap_rename_folder      (Folder         *folder,
6054                                          FolderItem     *item,
6055                                          const gchar    *name)
6056 {
6057         return -1;
6058 }
6059
6060 gchar imap_get_path_separator_for_item(FolderItem *item)
6061 {
6062         return '/';
6063 }
6064
6065 FolderClass *imap_get_class(void)
6066 {
6067         if (imap_class.idstr == NULL) {
6068                 imap_class.type = F_IMAP;
6069                 imap_class.idstr = "imap";
6070                 imap_class.uistr = "IMAP4";
6071
6072                 imap_class.new_folder = imap_folder_new;
6073                 imap_class.create_tree = imap_create_tree;
6074                 imap_class.create_folder = imap_create_folder;
6075                 imap_class.rename_folder = imap_rename_folder;
6076
6077                 imap_class.set_xml = folder_set_xml;
6078                 imap_class.get_xml = folder_get_xml;
6079                 imap_class.item_set_xml = imap_item_set_xml;
6080                 imap_class.item_get_xml = imap_item_get_xml;
6081                 /* nothing implemented */
6082         }
6083
6084         return &imap_class;
6085 }
6086
6087 void imap_disconnect_all(gboolean have_connectivity)
6088 {
6089 }
6090
6091 gint imap_subscribe(Folder *folder, FolderItem *item, gchar *rpath, gboolean sub)
6092 {
6093         return -1;
6094 }
6095
6096 GList * imap_scan_subtree(Folder *folder, FolderItem *item, gboolean unsubs_only, gboolean recursive)
6097 {
6098         return NULL;
6099 }
6100
6101 void imap_cache_msg(FolderItem *item, gint msgnum)
6102 {
6103 }
6104
6105 void imap_cancel_all(void)
6106 {
6107 }
6108
6109 gboolean imap_cancel_all_enabled(void)
6110 {
6111         return FALSE;
6112 }
6113
6114 #endif
6115
6116 #ifdef HAVE_LIBETPAN
6117 static void imap_synchronise(FolderItem *item, gint days)
6118 {
6119         if (IMAP_FOLDER_ITEM(item)->last_sync == IMAP_FOLDER_ITEM(item)->last_change) {
6120                 debug_print("%s already synced\n", item->path?item->path:item->name);
6121                 return;
6122         }
6123         debug_print("syncing %s\n", item->path?item->path:item->name);
6124         imap_gtk_synchronise(item, days);
6125         IMAP_FOLDER_ITEM(item)->last_sync = IMAP_FOLDER_ITEM(item)->last_change;
6126 }
6127 #endif
6128
6129 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag)
6130 {
6131 #ifdef HAVE_LIBETPAN
6132         GList *cur;
6133 #endif
6134         folder_item_set_xml(folder, item, tag);
6135
6136 #ifdef HAVE_LIBETPAN
6137         for (cur = tag->attr; cur != NULL; cur = g_list_next(cur)) {
6138                 XMLAttr *attr = (XMLAttr *) cur->data;
6139
6140                 if (!attr || !attr->name || !attr->value) continue;
6141                 if (!strcmp(attr->name, "uidnext"))
6142                         IMAP_FOLDER_ITEM(item)->uid_next = atoi(attr->value);
6143                 if (!strcmp(attr->name, "last_sync"))
6144                         IMAP_FOLDER_ITEM(item)->last_sync = atoi(attr->value);
6145                 if (!strcmp(attr->name, "last_change"))
6146                         IMAP_FOLDER_ITEM(item)->last_change = atoi(attr->value);
6147         }
6148         if (IMAP_FOLDER_ITEM(item)->last_change == 0)
6149                 IMAP_FOLDER_ITEM(item)->last_change = time(NULL);
6150 #endif
6151 }
6152
6153 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item)
6154 {
6155         XMLTag *tag;
6156
6157         tag = folder_item_get_xml(folder, item);
6158
6159 #ifdef HAVE_LIBETPAN
6160         xml_tag_add_attr(tag, xml_attr_new_int("uidnext",
6161                         IMAP_FOLDER_ITEM(item)->uid_next));
6162         xml_tag_add_attr(tag, xml_attr_new_int("last_sync",
6163                         IMAP_FOLDER_ITEM(item)->last_sync));
6164         xml_tag_add_attr(tag, xml_attr_new_int("last_change",
6165                         IMAP_FOLDER_ITEM(item)->last_change));
6166
6167 #endif
6168         return tag;
6169 }
6170
6171 /* ===================================================================
6172  * UTF-7 conversion routines as in RFC 2192
6173  * ===================================================================
6174  * These two functions from:
6175  * libimap library.
6176  * Copyright (C) 2003-2004 Pawel Salek. */
6177
6178 /* UTF7 modified base64 alphabet */
6179 static char base64chars[] =
6180   "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+,";
6181 #define UNDEFINED 64
6182
6183 /* UTF16 definitions */
6184 #define UTF16MASK       0x03FFUL
6185 #define UTF16SHIFT      10
6186 #define UTF16BASE       0x10000UL
6187 #define UTF16HIGHSTART  0xD800UL
6188 #define UTF16HIGHEND    0xDBFFUL
6189 #define UTF16LOSTART    0xDC00UL
6190 #define UTF16LOEND      0xDFFFUL
6191
6192
6193 /* Convert an IMAP mailbox to a UTF-8 string.
6194  *  dst needs to have roughly 4 times the storage space of src
6195  *    Hex encoding can triple the size of the input
6196  *    UTF-7 can be slightly denser than UTF-8
6197  *     (worst case: 8 octets UTF-7 becomes 9 octets UTF-8)
6198  */
6199 char* imap_modified_utf7_to_utf8(const char *mbox, gboolean change_spaces)
6200 {
6201   unsigned c, i, bitcount;
6202   unsigned long ucs4, utf16, bitbuf;
6203   unsigned char base64[256];
6204   const char *src;
6205   char *dst, *res  = g_malloc(2*strlen(mbox)+1);
6206
6207   dst = res;
6208   src = mbox;
6209   if(!dst) return NULL;
6210   /* initialize modified base64 decoding table */
6211   memset(base64, UNDEFINED, sizeof (base64));
6212   for (i = 0; i < sizeof (base64chars); ++i) {
6213     base64[(unsigned)base64chars[i]] = i;
6214   }
6215
6216   /* loop until end of string */
6217   while (*src != '\0') {
6218     c = *src++;
6219     /* deal with literal characters and &- */
6220     if (c != '&' || *src == '-') {
6221       /* encode literally */
6222       if (change_spaces && c == '_')
6223         *dst++ = ' ';
6224       else
6225         *dst++ = c;
6226       /* skip over the '-' if this is an &- sequence */
6227       if (c == '&') ++src;
6228     } else {
6229       /* convert modified UTF-7 -> UTF-16 -> UCS-4 -> UTF-8 -> HEX */
6230       bitbuf = 0;
6231       bitcount = 0;
6232       ucs4 = 0;
6233       while ((c = base64[(unsigned char) *src]) != UNDEFINED) {
6234         ++src;
6235         bitbuf = (bitbuf << 6) | c;
6236         bitcount += 6;
6237         /* enough bits for a UTF-16 character? */
6238         if (bitcount >= 16) {
6239           bitcount -= 16;
6240           utf16 = (bitcount ? bitbuf >> bitcount
6241                    : bitbuf) & 0xffff;
6242           /* convert UTF16 to UCS4 */
6243           if
6244             (utf16 >= UTF16HIGHSTART && utf16 <= UTF16HIGHEND) {
6245             ucs4 = (utf16 - UTF16HIGHSTART) << UTF16SHIFT;
6246             continue;
6247           } else if
6248             (utf16 >= UTF16LOSTART && utf16 <= UTF16LOEND) {
6249             ucs4 += utf16 - UTF16LOSTART + UTF16BASE;
6250           } else {
6251             ucs4 = utf16;
6252           }
6253
6254           /* convert UTF-16 range of UCS4 to UTF-8 */
6255           if (ucs4 <= 0x7fUL) {
6256             dst[0] = ucs4;
6257             dst += 1;
6258           } else if (ucs4 <= 0x7ffUL) {
6259             dst[0] = 0xc0 | (ucs4 >> 6);
6260             dst[1] = 0x80 | (ucs4 & 0x3f);
6261             dst += 2;
6262           } else if (ucs4 <= 0xffffUL) {
6263             dst[0] = 0xe0 | (ucs4 >> 12);
6264             dst[1] = 0x80 | ((ucs4 >> 6) & 0x3f);
6265             dst[2] = 0x80 | (ucs4 & 0x3f);
6266             dst += 3;
6267           } else {
6268             dst[0] = 0xf0 | (ucs4 >> 18);
6269             dst[1] = 0x80 | ((ucs4 >> 12) & 0x3f);
6270             dst[2] = 0x80 | ((ucs4 >> 6) & 0x3f);
6271             dst[3] = 0x80 | (ucs4 & 0x3f);
6272             dst += 4;
6273           }
6274         }
6275       }
6276       /* skip over trailing '-' in modified UTF-7 encoding */
6277       if (*src == '-') ++src;
6278     }
6279   }
6280   /* terminate destination string */
6281   *dst = '\0';
6282   return res;
6283 }
6284
6285 /* Convert hex coded UTF-8 string to modified UTF-7 IMAP mailbox
6286  *  dst should be about twice the length of src to deal with non-hex
6287  *  coded URLs
6288  */
6289 char* imap_utf8_to_modified_utf7(const char *src, gboolean change_spaces)
6290 {
6291   unsigned int utf8pos, utf8total, c, utf7mode, bitstogo, utf16flag;
6292   unsigned long ucs4 = 0, bitbuf = 0;
6293
6294   /* initialize hex lookup table */
6295   char *dst, *res;
6296
6297   if (!src) return NULL;
6298
6299   res = malloc(2*strlen(src)+1);
6300   dst = res;
6301   if(!dst) return NULL;
6302
6303   utf7mode = 0;
6304   utf8total = 0;
6305   bitstogo = 0;
6306   utf8pos = 0;
6307   while ((c = (unsigned char)*src) != '\0') {
6308     ++src;
6309     /* normal character? */
6310     if (c >= ' ' && c <= '~' && (c != '_' || !change_spaces)) {
6311       /* switch out of UTF-7 mode */
6312       if (utf7mode) {
6313         if (bitstogo) {
6314           *dst++ = base64chars[(bitbuf << (6 - bitstogo)) & 0x3F];
6315         }
6316         *dst++ = '-';
6317         utf7mode = 0;
6318         utf8pos  = 0;
6319         bitstogo = 0;
6320         utf8total= 0;
6321       }
6322       if (change_spaces && c == ' ')
6323         *dst++ = '_';
6324       else
6325         *dst++ = c;
6326       /* encode '&' as '&-' */
6327       if (c == '&') {
6328         *dst++ = '-';
6329       }
6330       continue;
6331     }
6332     /* switch to UTF-7 mode */
6333     if (!utf7mode) {
6334       *dst++ = '&';
6335       utf7mode = 1;
6336     }
6337     /* Encode US-ASCII characters as themselves */
6338     if (c < 0x80) {
6339       ucs4 = c;
6340     } else if (utf8total) {
6341       /* save UTF8 bits into UCS4 */
6342       ucs4 = (ucs4 << 6) | (c & 0x3FUL);
6343       if (++utf8pos < utf8total) {
6344         continue;
6345       }
6346     } else {
6347       utf8pos = 1;
6348       if (c < 0xE0) {
6349         utf8total = 2;
6350         ucs4 = c & 0x1F;
6351       } else if (c < 0xF0) {
6352         utf8total = 3;
6353         ucs4 = c & 0x0F;
6354       } else {
6355         /* NOTE: can't convert UTF8 sequences longer than 4 */
6356         utf8total = 4;
6357         ucs4 = c & 0x03;
6358       }
6359       continue;
6360     }
6361     /* loop to split ucs4 into two utf16 chars if necessary */
6362     utf8total = 0;
6363     do {
6364       if (ucs4 >= UTF16BASE) {
6365         ucs4 -= UTF16BASE;
6366         bitbuf = (bitbuf << 16) | ((ucs4 >> UTF16SHIFT)
6367                                    + UTF16HIGHSTART);
6368         ucs4 = (ucs4 & UTF16MASK) + UTF16LOSTART;
6369         utf16flag = 1;
6370       } else {
6371         bitbuf = (bitbuf << 16) | ucs4;
6372         utf16flag = 0;
6373       }
6374       bitstogo += 16;
6375       /* spew out base64 */
6376       while (bitstogo >= 6) {
6377         bitstogo -= 6;
6378         *dst++ = base64chars[(bitstogo ? (bitbuf >> bitstogo)
6379                               : bitbuf)
6380                              & 0x3F];
6381       }
6382     } while (utf16flag);
6383   }
6384   /* if in UTF-7 mode, finish in ASCII */
6385   if (utf7mode) {
6386     if (bitstogo) {
6387       *dst++ = base64chars[(bitbuf << (6 - bitstogo)) & 0x3F];
6388     }
6389     *dst++ = '-';
6390   }
6391   /* tie off string */
6392   *dst = '\0';
6393   return res;
6394 }