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", 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", 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", 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.");
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                                         if (copy_file(real_file, cache_file, TRUE) < 0)
2004                                                 debug_print("couldn't cache to %s: %s\n", cache_file,
2005                                                             strerror(errno));
2006                                         else
2007                                                 debug_print("copied to cache: %s\n", cache_file);
2008                                 }
2009                                 g_free(real_file);
2010                                 g_free(cache_file);
2011                                 g_free(cache_path);
2012                         }
2013                 } else
2014                         g_hash_table_insert(relation, msginfo,
2015                                           GINT_TO_POINTER(0));
2016         }
2017         statusbar_pop_all();
2018
2019         g_hash_table_destroy(uid_hash);
2020         imap_lep_set_free(seq_list);
2021
2022         g_free(destdir);
2023
2024         IMAP_FOLDER_ITEM(dest)->lastuid = 0;
2025         IMAP_FOLDER_ITEM(dest)->uid_next = 0;
2026         g_slist_free(IMAP_FOLDER_ITEM(dest)->uid_list);
2027         IMAP_FOLDER_ITEM(dest)->uid_list = NULL;
2028
2029         imap_scan_required(folder, dest);
2030         if (ok == MAILIMAP_NO_ERROR)
2031                 return last_num;
2032         else
2033                 return -1;
2034 }
2035
2036 static gint imap_copy_msg(Folder *folder, FolderItem *dest, MsgInfo *msginfo)
2037 {
2038         GSList msglist;
2039
2040         g_return_val_if_fail(msginfo != NULL, -1);
2041
2042         msglist.data = msginfo;
2043         msglist.next = NULL;
2044
2045         return imap_copy_msgs(folder, dest, &msglist, NULL);
2046 }
2047
2048 static gint imap_copy_msgs(Folder *folder, FolderItem *dest,
2049                     MsgInfoList *msglist, GHashTable *relation)
2050 {
2051         MsgInfo *msginfo;
2052         gint ret;
2053
2054         g_return_val_if_fail(folder != NULL, -1);
2055         g_return_val_if_fail(dest != NULL, -1);
2056         g_return_val_if_fail(msglist != NULL, -1);
2057
2058         msginfo = (MsgInfo *)msglist->data;
2059         g_return_val_if_fail(msginfo->folder != NULL, -1);
2060
2061         ret = imap_do_copy_msgs(folder, dest, msglist, relation, FALSE);
2062         return ret;
2063 }
2064
2065 static gboolean imap_matcher_type_is_local(gint matchertype)
2066 {
2067         switch (matchertype) {
2068         case MATCHCRITERIA_FROM:
2069         case MATCHCRITERIA_TO:
2070         case MATCHCRITERIA_CC:
2071         case MATCHCRITERIA_TO_OR_CC:
2072         case MATCHCRITERIA_SUBJECT:
2073         case MATCHCRITERIA_REFERENCES:
2074         case MATCHCRITERIA_INREPLYTO:
2075         case MATCHCRITERIA_AGE_GREATER:
2076         case MATCHCRITERIA_AGE_LOWER:
2077         case MATCHCRITERIA_FORWARDED:
2078         case MATCHCRITERIA_SPAM:
2079         case MATCHCRITERIA_UNREAD:
2080         case MATCHCRITERIA_NEW:
2081         case MATCHCRITERIA_MARKED:
2082         case MATCHCRITERIA_REPLIED:
2083         case MATCHCRITERIA_DELETED:
2084         case MATCHCRITERIA_SIZE_GREATER:
2085         case MATCHCRITERIA_SIZE_SMALLER:
2086         case MATCHCRITERIA_SIZE_EQUAL:
2087                 return TRUE;
2088         }
2089         return FALSE;
2090 }
2091
2092 static IMAPSearchKey* search_make_key(MatcherProp* match, gboolean* is_all)
2093 {
2094         if (match->matchtype == MATCHTYPE_MATCHCASE || match->matchtype == MATCHTYPE_MATCH) {
2095                 IMAPSearchKey* result = NULL;
2096                 gboolean invert = FALSE;
2097                 gint matchertype = match->criteria;
2098
2099                 if (is_all) {
2100                         *is_all = FALSE;
2101                 }
2102
2103                 switch (matchertype) {
2104                 case MATCHCRITERIA_NOT_NEW: invert = TRUE; matchertype = MATCHCRITERIA_NEW; break;
2105                 case MATCHCRITERIA_NOT_MARKED: invert = TRUE; matchertype = MATCHCRITERIA_MARKED; break;
2106                 case MATCHCRITERIA_NOT_FORWARDED: invert = TRUE; matchertype = MATCHCRITERIA_FORWARDED; break;
2107                 case MATCHCRITERIA_NOT_SPAM: invert = TRUE; matchertype = MATCHCRITERIA_SPAM; break;
2108                 case MATCHCRITERIA_NOT_SUBJECT: invert = TRUE; matchertype = MATCHCRITERIA_SUBJECT; break;
2109                 case MATCHCRITERIA_NOT_FROM: invert = TRUE; matchertype = MATCHCRITERIA_FROM; break;
2110                 case MATCHCRITERIA_NOT_TO: invert = TRUE; matchertype = MATCHCRITERIA_TO; break;
2111                 case MATCHCRITERIA_NOT_CC: invert = TRUE; matchertype = MATCHCRITERIA_CC; break;
2112                 case MATCHCRITERIA_NOT_REFERENCES: invert = TRUE; matchertype = MATCHCRITERIA_REFERENCES; break;
2113                 case MATCHCRITERIA_NOT_HEADER: invert = TRUE; matchertype = MATCHCRITERIA_HEADER; break;
2114                 case MATCHCRITERIA_NOT_TAG: invert = TRUE; matchertype = MATCHCRITERIA_TAG; break;
2115                 case MATCHCRITERIA_NOT_HEADERS_PART: invert = TRUE; matchertype = MATCHCRITERIA_HEADERS_PART; break;
2116                 case MATCHCRITERIA_NOT_HEADERS_CONT: invert = TRUE; matchertype = MATCHCRITERIA_HEADERS_CONT; break;
2117                 case MATCHCRITERIA_NOT_MESSAGE: invert = TRUE; matchertype = MATCHCRITERIA_MESSAGE; break;
2118                 case MATCHCRITERIA_NOT_BODY_PART: invert = TRUE; matchertype = MATCHCRITERIA_BODY_PART; break;
2119                 case MATCHCRITERIA_NOT_TO_AND_NOT_CC: invert = TRUE; matchertype = MATCHCRITERIA_TO_OR_CC; break;
2120                 case MATCHCRITERIA_NOT_INREPLYTO: invert = TRUE; matchertype = MATCHCRITERIA_INREPLYTO; break;
2121                 }
2122
2123                 /*
2124                  * this aborts conversion even for predicates understood by the following code.
2125                  * while that might seem wasteful, claws local search for information listed below
2126                  * has proven faster than IMAP search plus network roundtrips. once this changes,
2127                  * consider removing these exceptions.
2128                  */
2129                 if (imap_matcher_type_is_local(matchertype))
2130                         return NULL;
2131
2132                 /* the Message-ID header is also cached */
2133                 if (matchertype == MATCHCRITERIA_HEADER && g_strcmp0("Message-ID", match->header) == 0) {
2134                         return NULL;
2135                 }
2136
2137                 switch (matchertype) {
2138                 case MATCHCRITERIA_FORWARDED:
2139                         result = imap_search_new(IMAP_SEARCH_CRITERIA_TAG, NULL, RTAG_FORWARDED, 0);
2140                         break;
2141
2142                 case MATCHCRITERIA_SPAM:
2143                         result = imap_search_new(IMAP_SEARCH_CRITERIA_TAG, NULL, RTAG_JUNK, 0);
2144                         break;
2145
2146                 case MATCHCRITERIA_INREPLYTO:
2147                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, "In-Reply-To", match->expr, 0);
2148                         break;
2149
2150                 case MATCHCRITERIA_REFERENCES:
2151                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, "References", match->expr, 0);
2152                         break;
2153
2154                 case MATCHCRITERIA_TO_OR_CC:
2155                         result = imap_search_or(
2156                                         imap_search_new(IMAP_SEARCH_CRITERIA_TO, NULL, match->expr, 0),
2157                                         imap_search_new(IMAP_SEARCH_CRITERIA_CC, NULL, match->expr, 0)
2158                                         );
2159                         break;
2160
2161                 case MATCHCRITERIA_HEADERS_PART:
2162                 case MATCHCRITERIA_HEADERS_CONT:
2163                         result = imap_search_and(
2164                                         imap_search_not(imap_search_new(IMAP_SEARCH_CRITERIA_BODY, NULL, match->expr, 0)),
2165                                         imap_search_new(IMAP_SEARCH_CRITERIA_MESSAGE, NULL, match->expr, 0)
2166                                         );
2167                         break;
2168
2169                 case MATCHCRITERIA_SIZE_EQUAL:
2170                         result = imap_search_and(
2171                                         imap_search_not(imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_SMALLER, NULL, NULL, match->value)),
2172                                         imap_search_not(imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_GREATER, NULL, NULL, match->value))
2173                                         );
2174                         break;
2175
2176                 case MATCHCRITERIA_NOT_UNREAD:
2177                         result = imap_search_new(IMAP_SEARCH_CRITERIA_READ, NULL, NULL, 0);
2178                         break;
2179
2180                 case MATCHCRITERIA_UNREAD:
2181                         result = imap_search_new(IMAP_SEARCH_CRITERIA_UNREAD, NULL, NULL, 0);
2182                         break;
2183
2184                 case MATCHCRITERIA_NEW:
2185                         result = imap_search_new(IMAP_SEARCH_CRITERIA_NEW, NULL, NULL, 0);
2186                         break;
2187
2188                 case MATCHCRITERIA_MARKED:
2189                         result = imap_search_new(IMAP_SEARCH_CRITERIA_MARKED, NULL, NULL, 0);
2190                         break;
2191
2192                 case MATCHCRITERIA_DELETED:
2193                         result = imap_search_new(IMAP_SEARCH_CRITERIA_DELETED, NULL, NULL, 0);
2194                         break;
2195
2196                 case MATCHCRITERIA_REPLIED:
2197                         result = imap_search_new(IMAP_SEARCH_CRITERIA_REPLIED, NULL, NULL, 0);
2198                         break;
2199
2200                 case MATCHCRITERIA_TAG:
2201                         {
2202                                 gchar *tmp = imap_utf8_to_modified_utf7(match->expr, TRUE);
2203                                 result = imap_search_new(IMAP_SEARCH_CRITERIA_TAG, NULL, tmp, 0);
2204                                 g_free(tmp);
2205                         }
2206                         break;
2207
2208                 case MATCHCRITERIA_SUBJECT:
2209                         result = imap_search_new(IMAP_SEARCH_CRITERIA_SUBJECT, NULL, match->expr, 0);
2210                         break;
2211
2212                 case MATCHCRITERIA_FROM:
2213                         result = imap_search_new(IMAP_SEARCH_CRITERIA_FROM, NULL, match->expr, 0);
2214                         break;
2215
2216                 case MATCHCRITERIA_TO:
2217                         result = imap_search_new(IMAP_SEARCH_CRITERIA_TO, NULL, match->expr, 0);
2218                         break;
2219
2220                 case MATCHCRITERIA_CC:
2221                         result = imap_search_new(IMAP_SEARCH_CRITERIA_CC, NULL, match->expr, 0);
2222                         break;
2223
2224                 case MATCHCRITERIA_AGE_GREATER:
2225                         result = imap_search_new(IMAP_SEARCH_CRITERIA_AGE_GREATER, NULL, NULL, match->value);
2226                         break;
2227
2228                 case MATCHCRITERIA_AGE_LOWER:
2229                         result = imap_search_new(IMAP_SEARCH_CRITERIA_AGE_LOWER, NULL, NULL, match->value);
2230                         break;
2231
2232                 case MATCHCRITERIA_BODY_PART:
2233                         result = imap_search_new(IMAP_SEARCH_CRITERIA_BODY, NULL, match->expr, 0);
2234                         break;
2235
2236                 case MATCHCRITERIA_MESSAGE:
2237                         result = imap_search_new(IMAP_SEARCH_CRITERIA_MESSAGE, NULL, match->expr, 0);
2238                         break;
2239
2240                 case MATCHCRITERIA_HEADER:
2241                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, match->header, match->expr, 0);
2242                         break;
2243
2244                 case MATCHCRITERIA_SIZE_GREATER:
2245                         result = imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_GREATER, NULL, NULL, match->value);
2246                         break;
2247
2248                 case MATCHCRITERIA_SIZE_SMALLER:
2249                         result = imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_SMALLER, NULL, NULL, match->value);
2250                         break;
2251
2252                 default:
2253                         result = imap_search_new(IMAP_SEARCH_CRITERIA_ALL, NULL, NULL, 0);
2254                         if (is_all) {
2255                                 *is_all = TRUE;
2256                         }
2257                         break;
2258                 }
2259
2260                 if (invert) {
2261                         result = imap_search_not(result);
2262                         if (is_all && *is_all) {
2263                                 *is_all = FALSE;
2264                         }
2265                 }
2266
2267                 return result;
2268         }
2269
2270         return NULL;
2271 }
2272
2273 static void imap_change_search_charset(IMAPFolder *folder)
2274 {
2275         /* If server supports charset in searches, but the last used one failed,
2276          * changed to the next preferred charset. If none are still available,
2277          * disable charset searches.
2278          * Charsets are tried in the following order:
2279          * UTF-8, locale's charset, UTF-7.
2280          */
2281
2282         if (folder->search_charset_supported) {
2283                 if (folder->search_charset && !strcmp(folder->search_charset, conv_get_locale_charset_str_no_utf8()))
2284                         folder->search_charset = "UTF-8";
2285                 else if (folder->search_charset && !strcmp(folder->search_charset, "UTF-8"))
2286                         folder->search_charset = "UTF-7";
2287                 else {
2288                         folder->search_charset = NULL;
2289                         folder->search_charset_supported = FALSE;
2290                 }
2291         }
2292 }
2293
2294 static MatcherProp *imap_matcher_prop_set_charset(IMAPFolder *folder,
2295                                                   MatcherProp *utf8_prop,
2296                                                   gchar **charset)
2297 {
2298         /* If the match is going to be done locally, or the criteria is on
2299          * tag (special-cased to modified-UTF-7), or the expression searched
2300          * is ASCII, don't bother converting.
2301          */
2302         if (imap_matcher_type_is_local(utf8_prop->criteria)
2303          || utf8_prop->criteria == MATCHCRITERIA_TAG
2304          || utf8_prop->criteria == MATCHCRITERIA_NOT_TAG
2305          || utf8_prop->expr == NULL
2306          || is_ascii_str(utf8_prop->expr))
2307                 return matcherprop_new(utf8_prop->criteria,
2308                                utf8_prop->header,
2309                                utf8_prop->matchtype,
2310                                utf8_prop->expr,
2311                                utf8_prop->value);
2312         else {
2313                 gchar *conv_expr = NULL;
2314
2315                 /* If the search is server-side and the server doesn't support
2316                  * searching with the charsets we handle, bail out.
2317                  */
2318                 if (folder->search_charset_supported == FALSE)
2319                         return NULL;
2320
2321                 /* Else, convert. */
2322                 if (*charset == NULL)
2323                         *charset = g_strdup(folder->search_charset);
2324
2325                 conv_expr = conv_codeset_strdup(utf8_prop->expr, CS_UTF_8, *charset);
2326
2327                 if (conv_expr == NULL)
2328                         conv_expr = g_strdup(utf8_prop->expr);
2329
2330                 return matcherprop_new(utf8_prop->criteria,
2331                                utf8_prop->header,
2332                                utf8_prop->matchtype,
2333                                conv_expr,
2334                                utf8_prop->value);
2335         }
2336 }
2337
2338 static gint     search_msgs             (Folder                 *folder,
2339                                          FolderItem             *container,
2340                                          MsgNumberList          **msgs,
2341                                          gboolean               *on_server,
2342                                          MatcherList            *predicate,
2343                                          SearchProgressNotify   progress_cb,
2344                                          gpointer               progress_data)
2345 {
2346         IMAPSearchKey* key = NULL;
2347         GSList* cur;
2348         int result = -1;
2349         clist* uidlist = NULL;
2350         gboolean server_filtering_useless = FALSE;
2351         IMAPSession *session;
2352         gchar *charset_to_use = NULL;
2353
2354         if (on_server == NULL || !*on_server) {
2355                 return folder_item_search_msgs_local(folder, container, msgs, on_server,
2356                                 predicate, progress_cb, progress_data);
2357         }
2358
2359         for (cur = predicate->matchers; cur != NULL; cur = cur->next) {
2360                 IMAPSearchKey* matcherPart = NULL;
2361                 MatcherProp* prop = (MatcherProp*) cur->data;
2362                 gboolean is_all;
2363                 MatcherProp *imap_prop = imap_matcher_prop_set_charset(IMAP_FOLDER(folder), prop, &charset_to_use);
2364
2365                 if (imap_prop == NULL) {
2366                         /* Couldn't convert matcherprop to IMAP - probably not ascii
2367                          * and server doesn't support the charsets we do. */
2368                          return -1;
2369                 }
2370
2371                 matcherPart = search_make_key(imap_prop, &is_all);
2372
2373                 matcherprop_free(imap_prop);
2374
2375                 if (on_server) {
2376                         *on_server &= matcherPart != NULL && prop->matchtype == MATCHTYPE_MATCHCASE;
2377                 }
2378
2379                 if (matcherPart) {
2380                         if (key == NULL) {
2381                                 key = matcherPart;
2382                                 server_filtering_useless = is_all;
2383                         } else if (predicate->bool_and) {
2384                                 key = imap_search_and(key, matcherPart);
2385                                 server_filtering_useless &= is_all;
2386                         } else {
2387                                 key = imap_search_or(key, matcherPart);
2388                                 server_filtering_useless |= is_all;
2389                         }
2390                 }
2391         }
2392
2393         if (server_filtering_useless) {
2394                 imap_search_free(key);
2395                 key = NULL;
2396         }
2397
2398         if (key == NULL && progress_cb != NULL) {
2399                 GSList* cur;
2400                 GSList* list;
2401                 int count = 0;
2402
2403                 progress_cb(progress_data, TRUE, 0, 0, container->total_msgs);
2404                 progress_cb(progress_data, TRUE, container->total_msgs, 0, container->total_msgs);
2405
2406                 list = folder_item_get_msg_list(container);
2407                 for (cur = list; cur != NULL; cur = cur->next) {
2408                         *msgs = g_slist_prepend(*msgs, GUINT_TO_POINTER(((MsgInfo*) cur->data)->msgnum));
2409                         count++;
2410                 }
2411                 procmsg_msg_list_free(list);
2412
2413                 *msgs = g_slist_reverse(*msgs);
2414
2415                 return count;
2416         }
2417
2418         session = imap_session_get(folder);
2419         if (!session) {
2420                 return -1;
2421         }
2422         result = imap_select(session, IMAP_FOLDER(folder), FOLDER_ITEM(container),
2423                          NULL, NULL, NULL, NULL, NULL, TRUE);
2424         if (result != MAILIMAP_NO_ERROR)
2425                 return -1;
2426
2427         if (progress_cb)
2428                 progress_cb(progress_data, TRUE, 0, 0, container->total_msgs);
2429         result = imap_threaded_search(folder, IMAP_SEARCH_TYPE_KEYED, key, charset_to_use, NULL, &uidlist);
2430         if (progress_cb)
2431                 progress_cb(progress_data, TRUE, container->total_msgs, 0, container->total_msgs);
2432
2433         if (result == MAILIMAP_NO_ERROR) {
2434                 gint result = 0;
2435
2436                 *msgs = imap_uid_list_from_lep(uidlist, &result);
2437
2438                 mailimap_search_result_free(uidlist);
2439
2440                 if (charset_to_use != NULL)
2441                         g_free(charset_to_use);
2442
2443                 return result;
2444         } else if (charset_to_use != NULL) {
2445                 /* If search failed and was on an 8-bit string, try the next
2446                  * available charset to search if there still are some.
2447                  */
2448                 g_free(charset_to_use);
2449
2450                 imap_change_search_charset(IMAP_FOLDER(folder));
2451                 if (IMAP_FOLDER(folder)->search_charset_supported)
2452                         return search_msgs(folder, container, msgs, on_server, predicate,
2453                                    progress_cb, progress_data);
2454                 else
2455                         return -1;
2456         } else {
2457                 return -1;
2458         }
2459 }
2460
2461
2462 static gint imap_do_remove_msgs(Folder *folder, FolderItem *dest,
2463                                 MsgInfoList *msglist, GHashTable *relation)
2464 {
2465         gchar *destdir, *dir;
2466         GSList *numlist = NULL, *cur;
2467         MsgInfo *msginfo;
2468         IMAPSession *session;
2469         gint ok = MAILIMAP_NO_ERROR;
2470
2471         g_return_val_if_fail(folder != NULL, -1);
2472         g_return_val_if_fail(dest != NULL, -1);
2473         g_return_val_if_fail(msglist != NULL, -1);
2474
2475         debug_print("getting session...\n");
2476         session = imap_session_get(folder);
2477         if (!session) {
2478                 return -1;
2479         }
2480
2481         lock_session(session); /* unlocked later in the function */
2482
2483         msginfo = (MsgInfo *)msglist->data;
2484
2485         ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
2486                          NULL, NULL, NULL, NULL, NULL, FALSE);
2487         if (ok != MAILIMAP_NO_ERROR) {
2488                 return ok;
2489         }
2490
2491         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
2492         if (is_fatal(ok)) {
2493                 g_free(destdir);
2494                 return ok;
2495         }
2496         for (cur = msglist; cur; cur = cur->next) {
2497                 msginfo = (MsgInfo *)cur->data;
2498                 if (!MSG_IS_DELETED(msginfo->flags))
2499                         numlist = g_slist_prepend(numlist, GINT_TO_POINTER(msginfo->msgnum));
2500         }
2501         numlist = g_slist_reverse(numlist);
2502
2503         if (numlist != NULL) {
2504                 ok = imap_set_message_flags
2505                         (session, IMAP_FOLDER_ITEM(msginfo->folder), numlist, IMAP_FLAG_DELETED, NULL, TRUE);
2506                 if (ok != MAILIMAP_NO_ERROR) {
2507                         log_warning(LOG_PROTOCOL, _("can't set deleted flags\n"));
2508                         g_free(destdir);
2509                         return ok;
2510                 }
2511         } /* else we just need to expunge */
2512         ok = imap_cmd_expunge(session, folder->account->imap_use_trash);
2513         if (ok != MAILIMAP_NO_ERROR) {
2514                 log_warning(LOG_PROTOCOL, _("can't expunge\n"));
2515                 g_free(destdir);
2516                 return ok;
2517         }
2518
2519         session->folder_content_changed = TRUE;
2520         unlock_session(session);
2521
2522         dir = folder_item_get_path(msginfo->folder);
2523         if (is_dir_exist(dir)) {
2524                 for (cur = msglist; cur; cur = cur->next) {
2525                         msginfo = (MsgInfo *)cur->data;
2526                         remove_numbered_files(dir, msginfo->msgnum, msginfo->msgnum);
2527                 }
2528         }
2529         g_free(dir);
2530
2531         g_slist_free(numlist);
2532
2533         imap_scan_required(folder, dest);
2534
2535         g_free(destdir);
2536
2537         return 0;
2538 }
2539
2540 static gint imap_remove_msgs(Folder *folder, FolderItem *dest,
2541                     MsgInfoList *msglist, GHashTable *relation)
2542 {
2543         MsgInfo *msginfo;
2544
2545         g_return_val_if_fail(folder != NULL, -1);
2546         g_return_val_if_fail(dest != NULL, -1);
2547         if (msglist == NULL)
2548                 return 0;
2549
2550         msginfo = (MsgInfo *)msglist->data;
2551         g_return_val_if_fail(msginfo->folder != NULL, -1);
2552
2553         return imap_do_remove_msgs(folder, dest, msglist, relation);
2554 }
2555
2556 static gint imap_remove_all_msg(Folder *folder, FolderItem *item)
2557 {
2558         GSList *list = folder_item_get_msg_list(item);
2559         gint res = imap_remove_msgs(folder, item, list, NULL);
2560         procmsg_msg_list_free(list);
2561         return res;
2562 }
2563
2564 static gboolean imap_is_msg_changed(Folder *folder, FolderItem *item,
2565                                     MsgInfo *msginfo)
2566 {
2567         /* TODO: properly implement this method */
2568         return FALSE;
2569 }
2570
2571 static gint imap_close(Folder *folder, FolderItem *item)
2572 {
2573         return 0;
2574 }
2575
2576 static gint imap_scan_tree_real(Folder *folder, gboolean subs_only)
2577 {
2578         FolderItem *item = NULL;
2579         IMAPSession *session;
2580         gchar *root_folder = NULL;
2581
2582         g_return_val_if_fail(folder != NULL, -1);
2583         g_return_val_if_fail(folder->account != NULL, -1);
2584
2585         debug_print("getting session...\n");
2586         session = imap_session_get(folder);
2587         if (!session) {
2588                 if (!folder->node) {
2589                         folder_tree_destroy(folder);
2590                         item = folder_item_new(folder, folder->name, NULL);
2591                         item->folder = folder;
2592                         folder->node = item->node = g_node_new(item);
2593                 }
2594                 return -1;
2595         }
2596
2597         if (folder->account->imap_dir && *folder->account->imap_dir) {
2598                 gchar *real_path;
2599                 int r = MAILIMAP_NO_ERROR;
2600                 clist * lep_list;
2601
2602                 Xstrdup_a(root_folder, folder->account->imap_dir, {return -1;});
2603                 extract_quote(root_folder, '"');
2604                 subst_char(root_folder,
2605                            imap_get_path_separator(session, IMAP_FOLDER(folder),
2606                                                    root_folder, &r),
2607                            '/');
2608                 if (is_fatal(r))
2609                         return -1;
2610                 strtailchomp(root_folder, '/');
2611                 real_path = imap_get_real_path
2612                         (session, IMAP_FOLDER(folder), root_folder, &r);
2613                 if (is_fatal(r)) {
2614                         g_free(real_path);
2615                         return -1;
2616                 }
2617                 debug_print("IMAP root directory: %s\n", real_path);
2618
2619                 /* check if root directory exist */
2620
2621                 r = imap_threaded_list(session->folder, "", real_path,
2622                                        &lep_list);
2623
2624                 if (r != MAILIMAP_NO_ERROR)
2625                         imap_handle_error(SESSION(session), NULL, r);
2626
2627                 if ((r != MAILIMAP_NO_ERROR) || (clist_count(lep_list) == 0)) {
2628                         if (!folder->node) {
2629                                 item = folder_item_new(folder, folder->name, NULL);
2630                                 item->folder = folder;
2631                                 folder->node = item->node = g_node_new(item);
2632                         }
2633                         return -1;
2634                 }
2635                 mailimap_list_result_free(lep_list);
2636
2637                 g_free(real_path);
2638         }
2639
2640         if (folder->node)
2641                 item = FOLDER_ITEM(folder->node->data);
2642
2643         if (item && !item->path && root_folder) {
2644                 item->path = g_strdup(root_folder);
2645         }
2646
2647         if (!item || ((item->path || root_folder) &&
2648                       strcmp2(item->path, root_folder) != 0)) {
2649                 folder_tree_destroy(folder);
2650                 item = folder_item_new(folder, folder->name, root_folder);
2651                 item->folder = folder;
2652                 folder->node = item->node = g_node_new(item);
2653         }
2654
2655         imap_scan_tree_recursive(session, FOLDER_ITEM(folder->node->data), subs_only);
2656         imap_create_missing_folders(folder);
2657
2658         return 0;
2659 }
2660
2661 static gint imap_scan_tree(Folder *folder)
2662 {
2663         gboolean subs_only = FALSE;
2664         if (folder->account) {
2665                 debug_print(" scanning only subs %d\n", folder->account->imap_subsonly);
2666                 subs_only = folder->account->imap_subsonly;
2667         }
2668         return imap_scan_tree_real(folder, subs_only);
2669 }
2670
2671 static gint imap_scan_tree_recursive(IMAPSession *session, FolderItem *item, gboolean subs_only)
2672 {
2673         Folder *folder;
2674         IMAPFolder *imapfolder;
2675         FolderItem *new_item;
2676         GSList *item_list, *cur;
2677         GNode *node;
2678         gchar *real_path;
2679         gchar *wildcard_path;
2680         gchar separator;
2681         gchar wildcard[3];
2682         clist * lep_list;
2683         int r = MAILIMAP_NO_ERROR;
2684
2685         g_return_val_if_fail(item != NULL, -1);
2686         g_return_val_if_fail(item->folder != NULL, -1);
2687         g_return_val_if_fail(item->no_sub == FALSE, -1);
2688
2689         folder = item->folder;
2690         imapfolder = IMAP_FOLDER(folder);
2691
2692         separator = imap_get_path_separator(session, imapfolder, item->path, &r);
2693         if (is_fatal(r))
2694                 return r;
2695
2696         if (folder->ui_func)
2697                 folder->ui_func(folder, item, folder->ui_func_data);
2698
2699         if (item->path) {
2700                 wildcard[0] = separator;
2701                 wildcard[1] = '%';
2702                 wildcard[2] = '\0';
2703                 real_path = imap_get_real_path(session, imapfolder, item->path, &r);
2704                 if (is_fatal(r)) {
2705                         g_free(real_path);
2706                         return r;
2707                 }
2708         } else {
2709                 wildcard[0] = '%';
2710                 wildcard[1] = '\0';
2711                 real_path = g_strdup("");
2712         }
2713
2714         Xstrcat_a(wildcard_path, real_path, wildcard,
2715                   {g_free(real_path); return MAILIMAP_ERROR_BAD_STATE;});
2716         lep_list = NULL;
2717
2718         if (subs_only)
2719                 r = imap_threaded_lsub(folder, "", wildcard_path, &lep_list);
2720         else
2721                 r = imap_threaded_list(folder, "", wildcard_path, &lep_list);
2722
2723         if (r != MAILIMAP_NO_ERROR) {
2724                 imap_handle_error(SESSION(session), NULL, r);
2725                 item_list = NULL;
2726                 g_free(real_path);
2727                 return r;
2728         }
2729         else {
2730                 item_list = imap_list_from_lep(imapfolder,
2731                                                lep_list, real_path, FALSE);
2732                 mailimap_list_result_free(lep_list);
2733         }
2734
2735         g_free(real_path);
2736
2737         node = item->node->children;
2738         while (node != NULL) {
2739                 FolderItem *old_item = FOLDER_ITEM(node->data);
2740                 GNode *next = node->next;
2741
2742                 new_item = NULL;
2743                 for (cur = item_list; cur != NULL; cur = cur->next) {
2744                         FolderItem *cur_item = FOLDER_ITEM(cur->data);
2745                         if (!strcmp2(old_item->path, cur_item->path)) {
2746                                 new_item = cur_item;
2747                                 break;
2748                         }
2749                 }
2750                 if (!new_item) {
2751                         if (old_item && old_item->path && !strcasecmp(old_item->path, "INBOX")) {
2752                                 debug_print("not removing INBOX\n");
2753                         } else {
2754                                 debug_print("folder '%s' not found. removing...\n",
2755                                             old_item->path);
2756                                 folder_item_remove(old_item);
2757                         }
2758                 } else {
2759                         old_item->no_sub = new_item->no_sub;
2760                         old_item->no_select = new_item->no_select;
2761                         if (old_item->no_sub == TRUE && node->children) {
2762                                 debug_print("folder '%s' doesn't have "
2763                                             "subfolders. removing...\n",
2764                                             old_item->path);
2765                                 folder_item_remove_children(old_item);
2766                         }
2767                 }
2768
2769                 node = next;
2770         }
2771
2772         for (cur = item_list; cur != NULL; cur = cur->next) {
2773                 FolderItem *cur_item = FOLDER_ITEM(cur->data);
2774                 new_item = NULL;
2775
2776                 for (node = item->node->children; node != NULL;
2777                      node = node->next) {
2778                         if (!strcmp2(FOLDER_ITEM(node->data)->path,
2779                                      cur_item->path)) {
2780                                 new_item = FOLDER_ITEM(node->data);
2781                                 folder_item_destroy(cur_item);
2782                                 cur_item = NULL;
2783                                 break;
2784                         }
2785                 }
2786                 if (!new_item) {
2787                         new_item = cur_item;
2788                         debug_print("new folder '%s' found.\n", new_item->path);
2789                         folder_item_append(item, new_item);
2790                 }
2791
2792                 if (!strcasecmp(new_item->path, "INBOX")) {
2793                         new_item->stype = F_INBOX;
2794                         folder->inbox = new_item;
2795                 } else if (!folder_item_parent(item) || item->stype == F_INBOX) {
2796                         gchar *base;
2797
2798                         base = g_path_get_basename(new_item->path);
2799
2800                         if (!folder->outbox && !g_ascii_strcasecmp(base, "Sent")) {
2801                                 new_item->stype = F_OUTBOX;
2802                                 folder->outbox = new_item;
2803                         } else if (!folder->draft && (!g_ascii_strcasecmp(base, "Drafts") || !g_ascii_strcasecmp(base, "Draft"))) {
2804                                 new_item->stype = F_DRAFT;
2805                                 folder->draft = new_item;
2806                         } else if (!folder->queue && !g_ascii_strcasecmp(base, "Queue")) {
2807                                 new_item->stype = F_QUEUE;
2808                                 folder->queue = new_item;
2809                         } else if (!folder->trash && !g_ascii_strcasecmp(base, "Trash")) {
2810                                 new_item->stype = F_TRASH;
2811                                 folder->trash = new_item;
2812                         }
2813                         g_free(base);
2814                 }
2815
2816                 if (new_item->no_sub == FALSE)
2817                         imap_scan_tree_recursive(session, new_item, subs_only);
2818         }
2819
2820         g_slist_free(item_list);
2821
2822         return MAILIMAP_NO_ERROR;
2823 }
2824
2825 GList *imap_scan_subtree(Folder *folder, FolderItem *item, gboolean unsubs_only, gboolean recursive)
2826 {
2827         IMAPSession *session = imap_session_get(folder);
2828         gchar *real_path;
2829         gchar *wildcard_path;
2830         gchar separator;
2831         gchar wildcard[3];
2832         clist * lep_list;
2833         GSList *item_list = NULL, *cur;
2834         GList *child_list = NULL, *tmplist = NULL;
2835         GSList *sub_list = NULL;
2836         int r = MAILIMAP_NO_ERROR;
2837
2838         if (!session)
2839                 return NULL;
2840
2841         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &r);
2842         if (is_fatal(r))
2843                 return NULL;
2844
2845         if (item->path) {
2846                 wildcard[0] = separator;
2847                 wildcard[1] = '%';
2848                 wildcard[2] = '\0';
2849                 real_path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &r);
2850                 if (is_fatal(r)) {
2851                         g_free(real_path);
2852                         return NULL;
2853                 }
2854         } else {
2855                 wildcard[0] = '%';
2856                 wildcard[1] = '\0';
2857                 real_path = g_strdup("");
2858         }
2859
2860         Xstrcat_a(wildcard_path, real_path, wildcard,
2861                   {g_free(real_path); return NULL;});
2862         lep_list = NULL;
2863
2864         if (unsubs_only)
2865                 statusbar_print_all(_("Looking for unsubscribed folders in %s..."),
2866                                 item->path?item->path:item->name);
2867         else
2868                 statusbar_print_all(_("Looking for subfolders of %s..."),
2869                                 item->path?item->path:item->name);
2870
2871         r = imap_threaded_list(folder, "", wildcard_path, &lep_list);
2872         if (r) {
2873                 g_free(real_path);
2874                 statusbar_pop_all();
2875                 return NULL;
2876         }
2877         item_list = imap_list_from_lep(IMAP_FOLDER(folder),
2878                                lep_list, real_path, FALSE);
2879         mailimap_list_result_free(lep_list);
2880
2881         for (cur = item_list; cur != NULL; cur = cur->next) {
2882                 FolderItem *cur_item = FOLDER_ITEM(cur->data);
2883                 if (recursive) {
2884                         tmplist = imap_scan_subtree(folder, cur_item,
2885                                         unsubs_only, recursive);
2886                         if (tmplist)
2887                                 child_list = g_list_concat(child_list, tmplist);
2888                 }
2889                 child_list = g_list_prepend(child_list,
2890                                 imap_get_real_path(session,
2891                                         IMAP_FOLDER(folder), cur_item->path, &r));
2892                 if (is_fatal(r)) {
2893                         g_free(real_path);
2894                         statusbar_pop_all();
2895                         return NULL;
2896                 }
2897                 folder_item_destroy(cur_item);
2898         }
2899         child_list = g_list_reverse(child_list);
2900         g_slist_free(item_list);
2901
2902         if (unsubs_only) {
2903                 r = imap_threaded_lsub(folder, "", wildcard_path, &lep_list);
2904                 if (r) {
2905                         g_free(real_path);
2906                         statusbar_pop_all();
2907                         return NULL;
2908                 }
2909                 sub_list = imap_list_from_lep(IMAP_FOLDER(folder),
2910                                        lep_list, real_path, FALSE);
2911                 mailimap_list_result_free(lep_list);
2912
2913                 for (cur = sub_list; cur != NULL; cur = cur->next) {
2914                         FolderItem *cur_item = FOLDER_ITEM(cur->data);
2915                         GList *oldlitem = NULL;
2916                         gchar *tmp = imap_get_real_path(session,
2917                                         IMAP_FOLDER(folder), cur_item->path, &r);
2918                         if (r) {
2919                                 g_free(real_path);
2920                                 statusbar_pop_all();
2921                                 g_free(tmp);
2922                                 return NULL;
2923                         }
2924                         folder_item_destroy(cur_item);
2925                         oldlitem = g_list_find_custom(
2926                                         child_list, tmp, (GCompareFunc)strcmp2);
2927                         if (oldlitem) {
2928                                 child_list = g_list_remove_link(child_list, oldlitem);
2929                                 g_free(oldlitem->data);
2930                                 g_list_free(oldlitem);
2931                         }
2932                         g_free(tmp);
2933                 }
2934         }
2935
2936         g_free(real_path);
2937         statusbar_pop_all();
2938
2939         return child_list;
2940 }
2941
2942 static gint imap_create_tree(Folder *folder)
2943 {
2944         g_return_val_if_fail(folder != NULL, -1);
2945         g_return_val_if_fail(folder->node != NULL, -1);
2946         g_return_val_if_fail(folder->node->data != NULL, -1);
2947         g_return_val_if_fail(folder->account != NULL, -1);
2948
2949         imap_scan_tree(folder);
2950         imap_create_missing_folders(folder);
2951
2952         return 0;
2953 }
2954
2955 static void imap_create_missing_folders(Folder *folder)
2956 {
2957         g_return_if_fail(folder != NULL);
2958
2959         if (!folder->inbox)
2960                 folder->inbox = imap_create_special_folder
2961                         (folder, F_INBOX, "INBOX");
2962         if (!folder->trash)
2963                 folder->trash = imap_create_special_folder
2964                         (folder, F_TRASH, "Trash");
2965         if (!folder->queue)
2966                 folder->queue = imap_create_special_folder
2967                         (folder, F_QUEUE, "Queue");
2968         if (!folder->outbox)
2969                 folder->outbox = imap_create_special_folder
2970                         (folder, F_OUTBOX, "Sent");
2971         if (!folder->draft)
2972                 folder->draft = imap_create_special_folder
2973                         (folder, F_DRAFT, "Drafts");
2974 }
2975
2976 static FolderItem *imap_create_special_folder(Folder *folder,
2977                                               SpecialFolderItemType stype,
2978                                               const gchar *name)
2979 {
2980         FolderItem *item;
2981         FolderItem *new_item;
2982
2983         g_return_val_if_fail(folder != NULL, NULL);
2984         g_return_val_if_fail(folder->node != NULL, NULL);
2985         g_return_val_if_fail(folder->node->data != NULL, NULL);
2986         g_return_val_if_fail(folder->account != NULL, NULL);
2987         g_return_val_if_fail(name != NULL, NULL);
2988
2989         item = FOLDER_ITEM(folder->node->data);
2990         new_item = imap_create_folder(folder, item, name);
2991
2992         if (!new_item) {
2993                 g_warning("Can't create '%s'", name);
2994                 if (!folder->inbox) return NULL;
2995
2996                 new_item = imap_create_folder(folder, folder->inbox, name);
2997                 if (!new_item)
2998                         g_warning("Can't create '%s' under INBOX", name);
2999                 else
3000                         new_item->stype = stype;
3001         } else
3002                 new_item->stype = stype;
3003
3004         return new_item;
3005 }
3006
3007 static gchar *imap_folder_get_path(Folder *folder)
3008 {
3009         gchar *folder_path;
3010
3011         g_return_val_if_fail(folder != NULL, NULL);
3012         g_return_val_if_fail(folder->account != NULL, NULL);
3013
3014 #ifdef G_OS_WIN32
3015         gchar *sanitized_dirname = g_strdup(folder->account->recv_server);
3016         g_strdelimit(sanitized_dirname, ":", ',');
3017 #endif
3018
3019         folder_path = g_strconcat(get_imap_cache_dir(),
3020                                   G_DIR_SEPARATOR_S,
3021 #ifdef G_OS_WIN32
3022                                                                                                                                         sanitized_dirname,
3023 #else
3024                                   folder->account->recv_server,
3025 #endif
3026                                   G_DIR_SEPARATOR_S,
3027                                   folder->account->userid,
3028                                   NULL);
3029
3030 #ifdef G_OS_WIN32
3031         g_free(sanitized_dirname);
3032 #endif
3033         return folder_path;
3034 }
3035
3036 #ifdef G_OS_WIN32
3037 static gchar *imap_encode_unsafe_chars(const gchar *str)
3038 {
3039         gchar *ret = NULL, *o_ret;
3040         gchar *i;
3041         if (!str)
3042                 return NULL;
3043         ret = g_malloc(3*strlen(str)+1);
3044         o_ret = ret;
3045         for (i = str; *i; i++) {
3046                 switch(*i) {
3047                         case ':':
3048                         case '|':
3049                         case '<':
3050                         case '>':
3051                         case '*':
3052                         case '?':
3053                         case '#':
3054                                 *ret++ = '%';
3055                                 *ret++ = '0'+(*i/10);
3056                                 *ret++ = '0'+(*i%10);
3057                                 break;
3058                         default:
3059                                 *ret++ = *i;
3060                 }
3061         }
3062         *ret++ = '\0';
3063         return o_ret;
3064 }
3065 #endif
3066 static gchar *imap_item_get_path(Folder *folder, FolderItem *item)
3067 {
3068         gchar *folder_path, *path;
3069         gchar *item_path = NULL;
3070
3071         g_return_val_if_fail(folder != NULL, NULL);
3072         g_return_val_if_fail(item != NULL, NULL);
3073         folder_path = imap_folder_get_path(folder);
3074
3075         g_return_val_if_fail(folder_path != NULL, NULL);
3076
3077 #ifdef G_OS_UNIX
3078         item_path = g_strdup(item->path);
3079 #else
3080         item_path = imap_encode_unsafe_chars(item->path);
3081 #endif
3082
3083         if (g_path_is_absolute(folder_path)) {
3084                 if (item_path)
3085                         path = g_strconcat(folder_path, G_DIR_SEPARATOR_S,
3086                                            item_path, NULL);
3087                 else
3088                         path = g_strdup(folder_path);
3089         } else {
3090                 if (item_path)
3091                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
3092                                            folder_path, G_DIR_SEPARATOR_S,
3093                                            item_path, NULL);
3094                 else
3095                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
3096                                            folder_path, NULL);
3097         }
3098         g_free(folder_path);
3099         g_free(item_path);
3100 #ifdef G_OS_WIN32
3101         while (strchr(path, '/'))
3102                 *strchr(path, '/') = '\\';
3103 #endif
3104
3105         return path;
3106 }
3107
3108 static FolderItem *imap_create_folder(Folder *folder, FolderItem *parent,
3109                                const gchar *name)
3110 {
3111         gchar *dirpath, *imap_path;
3112         IMAPSession *session;
3113         FolderItem *new_item;
3114         gchar separator;
3115         gchar *new_name;
3116         const gchar *p;
3117         gint ok = MAILIMAP_NO_ERROR;
3118         gboolean no_select = FALSE, no_sub = FALSE;
3119         gboolean exist = FALSE;
3120
3121         g_return_val_if_fail(folder != NULL, NULL);
3122         g_return_val_if_fail(folder->account != NULL, NULL);
3123         g_return_val_if_fail(parent != NULL, NULL);
3124         g_return_val_if_fail(name != NULL, NULL);
3125
3126         if (to_number(name) > 0) {
3127                 gchar *cached_msg = imap_get_cached_filename(parent, to_number(name));
3128                 if (is_file_exist(cached_msg)) {
3129                         if (claws_unlink(cached_msg) != 0) {
3130                                 return NULL;
3131                         }
3132                 }
3133         }
3134
3135         debug_print("getting session...\n");
3136         session = imap_session_get(folder);
3137         if (!session) {
3138                 return NULL;
3139         }
3140
3141         if (!folder_item_parent(parent) && strcasecmp(name, "INBOX") == 0) {
3142                 dirpath = g_strdup(name);
3143         }else if (parent->path)
3144                 dirpath = g_strconcat(parent->path, "/", name, NULL);
3145         else if ((p = strchr(name, '/')) != NULL && *(p + 1) != '\0')
3146                 dirpath = g_strdup(name);
3147         else if (folder->account->imap_dir && *folder->account->imap_dir) {
3148                 gchar *imap_dir;
3149
3150                 Xstrdup_a(imap_dir, folder->account->imap_dir, {return NULL;});
3151                 strtailchomp(imap_dir, '/');
3152                 dirpath = g_strconcat(imap_dir, "/", name, NULL);
3153         } else
3154                 dirpath = g_strdup(name);
3155
3156
3157
3158         /* keep trailing directory separator to create a folder that contains
3159            sub folder */
3160         imap_path = imap_utf8_to_modified_utf7(dirpath, FALSE);
3161
3162         strtailchomp(dirpath, '/');
3163         Xstrdup_a(new_name, name, {
3164                 g_free(dirpath);
3165                 g_free(imap_path);
3166                 return NULL;});
3167
3168         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), imap_path, &ok);
3169         if (is_fatal(ok)) {
3170                 g_free(imap_path);
3171                 return NULL;
3172         }
3173         imap_path_separator_subst(imap_path, separator);
3174         /* remove trailing / for display */
3175         strtailchomp(new_name, '/');
3176
3177         if (strcasecmp(dirpath, "INBOX") != 0) {
3178                 GPtrArray *argbuf;
3179                 int r;
3180                 clist * lep_list;
3181
3182                 argbuf = g_ptr_array_new();
3183                 r = imap_threaded_list(folder, "", imap_path, &lep_list);
3184                 if (r != MAILIMAP_NO_ERROR) {
3185                         imap_handle_error(SESSION(session), NULL, r);
3186                         log_warning(LOG_PROTOCOL, _("can't create mailbox: LIST failed\n"));
3187                         g_free(imap_path);
3188                         g_free(dirpath);
3189                         ptr_array_free_strings(argbuf);
3190                         g_ptr_array_free(argbuf, TRUE);
3191                         return NULL;
3192                 }
3193
3194                 if (clist_count(lep_list) > 0)
3195                         exist = TRUE;
3196                 mailimap_list_result_free(lep_list);
3197                 lep_list = NULL;
3198                 if (!exist) {
3199                         ok = imap_cmd_create(session, imap_path);
3200                         if (ok != MAILIMAP_NO_ERROR) {
3201                                 log_warning(LOG_PROTOCOL, _("can't create mailbox\n"));
3202                                 g_free(imap_path);
3203                                 g_free(dirpath);
3204                                 return NULL;
3205                         }
3206                         r = imap_threaded_list(folder, "", imap_path, &lep_list);
3207                         if (r == MAILIMAP_NO_ERROR) {
3208                                 GSList *item_list = imap_list_from_lep(IMAP_FOLDER(folder),
3209                                                lep_list, dirpath, TRUE);
3210                                 if (item_list) {
3211                                         FolderItem *cur_item = FOLDER_ITEM(item_list->data);
3212                                         no_select = cur_item->no_select;
3213                                         no_sub = cur_item->no_sub;
3214                                         g_slist_free(item_list);
3215                                 }
3216                                 mailimap_list_result_free(lep_list);
3217                         } else {
3218                                 imap_handle_error(SESSION(session), NULL, r);
3219                         }
3220                 }
3221                 imap_threaded_subscribe(folder, imap_path, TRUE);
3222         } else {
3223                 clist *lep_list;
3224                 int r;
3225                 /* just get flags */
3226                 r = imap_threaded_list(folder, "", "INBOX", &lep_list);
3227                 if (r == MAILIMAP_NO_ERROR) {
3228                         GSList *item_list = imap_list_from_lep(IMAP_FOLDER(folder),
3229                                        lep_list, dirpath, TRUE);
3230                         if (item_list) {
3231                                 FolderItem *cur_item = FOLDER_ITEM(item_list->data);
3232                                 no_select = cur_item->no_select;
3233                                 no_sub = cur_item->no_sub;
3234                                 g_slist_free(item_list);
3235                         }
3236                         mailimap_list_result_free(lep_list);
3237                 } else {
3238                         imap_handle_error(SESSION(session), NULL, r);
3239                 }
3240         }
3241
3242         new_item = folder_item_new(folder, new_name, dirpath);
3243         new_item->no_select = no_select;
3244         new_item->no_sub = no_sub;
3245         folder_item_append(parent, new_item);
3246         g_free(imap_path);
3247         g_free(dirpath);
3248
3249         dirpath = folder_item_get_path(new_item);
3250         if (!is_dir_exist(dirpath))
3251                 make_dir_hier(dirpath);
3252         g_free(dirpath);
3253
3254         if (exist) {
3255                 /* folder existed, scan it */
3256                 imap_scan_required(folder, new_item);
3257                 folder_item_scan_full(new_item, FALSE);
3258         }
3259
3260         return new_item;
3261 }
3262
3263 static gint imap_rename_folder(Folder *folder, FolderItem *item,
3264                                const gchar *name)
3265 {
3266         gchar *dirpath;
3267         gchar *newpath;
3268         gchar *real_oldpath;
3269         gchar *real_newpath;
3270         gchar *paths[2];
3271         gchar *old_cache_dir;
3272         gchar *new_cache_dir;
3273         IMAPSession *session;
3274         gchar separator;
3275         gint ok = MAILIMAP_NO_ERROR;
3276         gint exists, recent, unseen;
3277         guint32 uid_validity;
3278
3279         g_return_val_if_fail(folder != NULL, -1);
3280         g_return_val_if_fail(item != NULL, -1);
3281         g_return_val_if_fail(item->path != NULL, -1);
3282         g_return_val_if_fail(name != NULL, -1);
3283
3284         debug_print("getting session...\n");
3285         session = imap_session_get(folder);
3286         if (!session) {
3287                 return -1;
3288         }
3289
3290         if (strchr(name, imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &ok)) != NULL ||
3291                 is_fatal(ok)) {
3292                 g_warning("New folder name must not contain the namespace "
3293                             "path separator");
3294                 return -1;
3295         }
3296
3297         real_oldpath = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &ok);
3298         if (is_fatal(ok)) {
3299                 g_free(real_oldpath);
3300                 return -1;
3301         }
3302
3303         g_free(session->mbox);
3304         session->mbox = NULL;
3305         session->exists = 0;
3306         session->recent = 0;
3307         session->expunge = 0;
3308         ok = imap_cmd_examine(session, "INBOX",
3309                               &exists, &recent, &unseen, &uid_validity, FALSE);
3310         if (ok != MAILIMAP_NO_ERROR) {
3311                 g_free(real_oldpath);
3312                 return -1;
3313         }
3314
3315         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &ok);
3316         if (is_fatal(ok)) {
3317                 g_free(real_oldpath);
3318                 return -1;
3319         }
3320         if (strchr(item->path, G_DIR_SEPARATOR)) {
3321                 dirpath = g_path_get_dirname(item->path);
3322                 newpath = g_strconcat(dirpath, G_DIR_SEPARATOR_S, name, NULL);
3323                 g_free(dirpath);
3324         } else
3325                 newpath = g_strdup(name);
3326
3327         real_newpath = imap_utf8_to_modified_utf7(newpath, FALSE);
3328         imap_path_separator_subst(real_newpath, separator);
3329
3330         ok = imap_cmd_rename(session, real_oldpath, real_newpath);
3331         if (ok != MAILIMAP_NO_ERROR) {
3332                 log_warning(LOG_PROTOCOL, _("can't rename mailbox: %s to %s\n"),
3333                             real_oldpath, real_newpath);
3334                 g_free(real_oldpath);
3335                 g_free(newpath);
3336                 g_free(real_newpath);
3337                 return -1;
3338         }
3339         g_free(item->name);
3340         item->name = g_strdup(name);
3341
3342         old_cache_dir = folder_item_get_path(item);
3343
3344         paths[0] = g_strdup(item->path);
3345         paths[1] = newpath;
3346         g_node_traverse(item->node, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
3347                         imap_rename_folder_func, paths);
3348
3349         if (is_dir_exist(old_cache_dir)) {
3350                 new_cache_dir = folder_item_get_path(item);
3351                 if (g_rename(old_cache_dir, new_cache_dir) < 0) {
3352                         FILE_OP_ERROR(old_cache_dir, "rename");
3353                 }
3354                 g_free(new_cache_dir);
3355         }
3356
3357         g_free(old_cache_dir);
3358         g_free(paths[0]);
3359         g_free(newpath);
3360         g_free(real_oldpath);
3361         g_free(real_newpath);
3362         return 0;
3363 }
3364
3365 gint imap_subscribe(Folder *folder, FolderItem *item, gchar *rpath, gboolean sub)
3366 {
3367         gchar *path;
3368         gint r = MAILIMAP_NO_ERROR;
3369         IMAPSession *session;
3370         debug_print("getting session...\n");
3371
3372         session = imap_session_get(folder);
3373         if (!session) {
3374                 return -1;
3375         }
3376         if (item && item->path) {
3377                 path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &r);
3378                 if (!path)
3379                         return -1;
3380                 if (is_fatal(r)) {
3381                         g_free(path);
3382                         return -1;
3383                 }
3384                 if (!strcasecmp(path, "INBOX") && sub == FALSE) {
3385                         g_free(path);
3386                         return -1;
3387                 }
3388                 debug_print("%ssubscribing %s\n", sub?"":"un", path);
3389                 r = imap_threaded_subscribe(folder, path, sub);
3390                 g_free(path);
3391         } else if (rpath) {
3392                 r = imap_threaded_subscribe(folder, rpath, sub);
3393         } else
3394                 return -1;
3395         return r;
3396 }
3397
3398 static gint imap_remove_folder_real(Folder *folder, FolderItem *item)
3399 {
3400         gint ok = MAILIMAP_NO_ERROR;
3401         IMAPSession *session;
3402         gchar *path;
3403         gchar *cache_dir;
3404         gboolean selected_folder;
3405
3406         g_return_val_if_fail(folder != NULL, -1);
3407         g_return_val_if_fail(item != NULL, -1);
3408         g_return_val_if_fail(item->path != NULL, -1);
3409
3410         debug_print("getting session...\n");
3411         session = imap_session_get(folder);
3412         if (!session) {
3413                 return -1;
3414         }
3415         path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &ok);
3416         if (is_fatal(ok)) {
3417                 g_free(path);
3418                 return -1;
3419         }
3420         imap_threaded_subscribe(folder, path, FALSE);
3421
3422         selected_folder = (session->mbox != NULL) &&
3423                           (!strcmp(session->mbox, item->path));
3424         if (selected_folder) {
3425                 ok = imap_cmd_close(session);
3426                 if (ok != MAILIMAP_NO_ERROR) {
3427                         debug_print("close err %d\n", ok);
3428                         return ok;
3429                 }
3430         }
3431         ok = imap_cmd_delete(session, path);
3432         if (ok != MAILIMAP_NO_ERROR && !is_fatal(ok)) {
3433                 gchar *tmp = NULL;
3434
3435                 ok = MAILIMAP_NO_ERROR;
3436                 tmp = g_strdup_printf("%s%c", path,
3437                                 imap_get_path_separator(session, IMAP_FOLDER(folder), path, &ok));
3438                 g_free(path);
3439                 path = tmp;
3440                 if (!is_fatal(ok))
3441                         ok = imap_cmd_delete(session, path);
3442         }
3443
3444         if (ok != MAILIMAP_NO_ERROR) {
3445                 log_warning(LOG_PROTOCOL, _("can't delete mailbox\n"));
3446                 g_free(path);
3447                 return -1;
3448         }
3449
3450         g_free(path);
3451         cache_dir = folder_item_get_path(item);
3452         if (is_dir_exist(cache_dir) && remove_dir_recursive(cache_dir) < 0)
3453                 g_warning("can't remove directory '%s'", cache_dir);
3454         g_free(cache_dir);
3455         folder_item_remove(item);
3456         return 0;
3457 }
3458
3459 static gint imap_remove_folder(Folder *folder, FolderItem *item)
3460 {
3461         GNode *node, *next;
3462
3463         g_return_val_if_fail(item != NULL, -1);
3464         g_return_val_if_fail(item->folder != NULL, -1);
3465         g_return_val_if_fail(item->node != NULL, -1);
3466
3467         node = item->node->children;
3468         while (node != NULL) {
3469                 next = node->next;
3470                 if (imap_remove_folder(folder, FOLDER_ITEM(node->data)) < 0)
3471                         return -1;
3472                 node = next;
3473         }
3474         debug_print("IMAP removing %s\n", item->path);
3475
3476         if (imap_remove_all_msg(folder, item) < 0)
3477                 return -1;
3478         return imap_remove_folder_real(folder, item);
3479 }
3480
3481 typedef struct _uncached_data {
3482         IMAPSession *session;
3483         FolderItem *item;
3484         MsgNumberList *numlist;
3485         guint cur;
3486         guint total;
3487         gboolean done;
3488         int ok;
3489 } uncached_data;
3490
3491 static void *imap_get_uncached_messages_thread(void *data)
3492 {
3493         uncached_data *stuff = (uncached_data *)data;
3494         IMAPSession *session = stuff->session;
3495         FolderItem *item = stuff->item;
3496         MsgNumberList *numlist = stuff->numlist;
3497         GSList *newlist = NULL;
3498         GSList *llast = NULL;
3499         GSList *seq_list, *cur;
3500         gboolean got_alien_tags = FALSE;
3501
3502         debug_print("uncached_messages\n");
3503
3504         if (session == NULL || item == NULL || item->folder == NULL
3505             || FOLDER_CLASS(item->folder) != &imap_class) {
3506                 stuff->done = TRUE;
3507                 return NULL;
3508         }
3509
3510         seq_list = imap_get_lep_set_from_numlist(IMAP_FOLDER(item->folder), numlist);
3511         debug_print("get msgs info\n");
3512         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
3513                 struct mailimap_set * imapset;
3514                 unsigned int i;
3515                 int r;
3516                 carray * env_list;
3517                 int count;
3518
3519                 if (session->cancelled)
3520                         break;
3521
3522                 imapset = cur->data;
3523
3524                 r = imap_threaded_fetch_env(session->folder,
3525                                             imapset, &env_list);
3526                 if (r != MAILIMAP_NO_ERROR) {
3527                         imap_handle_error(SESSION(session), NULL, r);
3528                         if (is_fatal(r)) {
3529                                 stuff->ok = r;
3530                                 return NULL;
3531                         }
3532                         continue;
3533                 }
3534
3535                 session_set_access_time(SESSION(session));
3536
3537                 count = 0;
3538                 for(i = 0 ; i < carray_count(env_list) ; i += 2) {
3539                         struct imap_fetch_env_info * info;
3540                         MsgInfo * msginfo;
3541                         GSList *tags = NULL, *cur = NULL;
3542                         info = carray_get(env_list, i);
3543                         tags = carray_get(env_list, i+1);
3544                         msginfo = imap_envelope_from_lep(info, item);
3545                         if (msginfo == NULL) {
3546                                 slist_free_strings_full(tags);
3547                                 continue;
3548                         }
3549                         g_slist_free(msginfo->tags);
3550                         msginfo->tags = NULL;
3551
3552                         for (cur = tags; cur; cur = cur->next) {
3553                                 gchar *real_tag = imap_modified_utf7_to_utf8(cur->data, TRUE);
3554                                 gint id = 0;
3555                                 id = tags_get_id_for_str(real_tag);
3556                                 if (id == -1) {
3557                                         id = tags_add_tag(real_tag);
3558                                         got_alien_tags = TRUE;
3559                                 }
3560                                 if (!g_slist_find(msginfo->tags, GINT_TO_POINTER(id))) {
3561                                         msginfo->tags = g_slist_prepend(
3562                                                         msginfo->tags,
3563                                                         GINT_TO_POINTER(id));
3564                                 }
3565                                 g_free(real_tag);
3566                         }
3567                         if (msginfo->tags)
3568                                 msginfo->tags = g_slist_reverse(msginfo->tags);
3569                         slist_free_strings_full(tags);
3570                         msginfo->folder = item;
3571                         if (!newlist)
3572                                 llast = newlist = g_slist_append(newlist, msginfo);
3573                         else {
3574                                 llast = g_slist_append(llast, msginfo);
3575                                 llast = llast->next;
3576                         }
3577                         count ++;
3578                 }
3579
3580                 imap_fetch_env_free(env_list);
3581         }
3582
3583         if (got_alien_tags) {
3584                 tags_write_tags();
3585                 main_window_reflect_tags_changes(mainwindow_get_mainwindow());
3586         }
3587
3588         imap_lep_set_free(seq_list);
3589
3590         session_set_access_time(SESSION(session));
3591         stuff->done = TRUE;
3592         return newlist;
3593 }
3594
3595 #define MAX_MSG_NUM 50
3596
3597 static GSList *imap_get_uncached_messages(IMAPSession *session,
3598                                         FolderItem *item,
3599                                         MsgNumberList *numlist,
3600                                         int *r)
3601 {
3602         GSList *result = NULL;
3603         GSList * cur;
3604         uncached_data *data = g_new0(uncached_data, 1);
3605
3606         cur = numlist;
3607         data->total = g_slist_length(numlist);
3608         data->ok = MAILIMAP_NO_ERROR;
3609         debug_print("messages list : %i\n", data->total);
3610
3611         while (cur != NULL) {
3612                 GSList * partial_result;
3613                 int count;
3614                 GSList * newlist;
3615                 GSList * llast;
3616
3617                 llast = NULL;
3618                 count = 0;
3619                 newlist = NULL;
3620                 while (count < MAX_MSG_NUM) {
3621                         void * p;
3622
3623                         p = cur->data;
3624
3625                         if (newlist == NULL)
3626                                 llast = newlist = g_slist_append(newlist, p);
3627                         else {
3628                                 llast = g_slist_append(llast, p);
3629                                 llast = llast->next;
3630                         }
3631                         count ++;
3632
3633                         cur = cur->next;
3634                         if (cur == NULL)
3635                                 break;
3636                 }
3637
3638                 data->done = FALSE;
3639                 data->session = session;
3640                 data->item = item;
3641                 data->numlist = newlist;
3642                 data->cur += count;
3643
3644                 if (prefs_common.work_offline &&
3645                     !inc_offline_should_override(FALSE,
3646                         _("Claws Mail needs network access in order "
3647                           "to access the IMAP server."))) {
3648                         g_free(data);
3649                         return NULL;
3650                 }
3651
3652                 partial_result =
3653                         (GSList *)imap_get_uncached_messages_thread(data);
3654                 *r = data->ok;
3655                 if (data->ok != MAILIMAP_NO_ERROR) {
3656                         goto bail;
3657                 }
3658                 statusbar_progress_all(data->cur,data->total, 1);
3659
3660                 g_slist_free(newlist);
3661
3662                 result = g_slist_concat(result, partial_result);
3663         }
3664 bail:
3665         g_free(data);
3666
3667         statusbar_progress_all(0,0,0);
3668         statusbar_pop_all();
3669
3670         return result;
3671 }
3672
3673 static void imap_delete_all_cached_messages(FolderItem *item)
3674 {
3675         gchar *dir;
3676
3677         g_return_if_fail(item != NULL);
3678         g_return_if_fail(item->folder != NULL);
3679         g_return_if_fail(FOLDER_CLASS(item->folder) == &imap_class);
3680
3681         debug_print("Deleting all cached messages...\n");
3682
3683         dir = folder_item_get_path(item);
3684         if (is_dir_exist(dir))
3685                 remove_all_numbered_files(dir);
3686         g_free(dir);
3687
3688         debug_print("done.\n");
3689 }
3690
3691 gchar imap_get_path_separator_for_item(FolderItem *item)
3692 {
3693         Folder *folder = NULL;
3694         IMAPFolder *imap_folder = NULL;
3695         IMAPSession *session = NULL;
3696         gchar result = '/';
3697         gint ok = MAILIMAP_NO_ERROR;
3698         if (!item)
3699                 return '/';
3700         folder = item->folder;
3701
3702         if (!folder)
3703                 return '/';
3704
3705         imap_folder = IMAP_FOLDER(folder);
3706
3707         debug_print("getting session...");
3708         session = imap_session_get(FOLDER(folder));
3709         result = imap_get_path_separator(session, imap_folder, item->path, &ok);
3710         return result;
3711 }
3712
3713 static gchar imap_refresh_path_separator(IMAPSession *session, IMAPFolder *folder, const gchar *subfolder, gint *ok)
3714 {
3715         clist * lep_list;
3716         int r;
3717         gchar separator = '\0';
3718
3719         g_return_val_if_fail(session != NULL, '/');
3720         r = imap_threaded_list((Folder *)folder, "", subfolder, &lep_list);
3721
3722         if (r != MAILIMAP_NO_ERROR) {
3723                 imap_handle_error(SESSION(session), NULL, r);
3724                 log_warning(LOG_PROTOCOL, _("LIST failed\n"));
3725                 *ok = r;
3726                 return '\0';
3727         }
3728
3729         if (lep_list != NULL && clist_count(lep_list) > 0) {
3730                 clistiter * iter = clist_begin(lep_list);
3731                 struct mailimap_mailbox_list * mb;
3732                 mb = clist_content(iter);
3733
3734                 separator = mb->mb_delimiter;
3735                 debug_print("got separator: %c\n", folder->last_seen_separator);
3736         }
3737         *ok = MAILIMAP_NO_ERROR;
3738         mailimap_list_result_free(lep_list);
3739         return separator;
3740 }
3741
3742 static gchar imap_get_path_separator(IMAPSession *session, IMAPFolder *folder, const gchar *path, gint *ok)
3743 {
3744         gchar separator = '/';
3745         *ok = MAILIMAP_NO_ERROR;
3746         if (folder->last_seen_separator == 0) {
3747                 folder->last_seen_separator = imap_refresh_path_separator(session, folder, "", ok);
3748         }
3749
3750         if (folder->last_seen_separator == 0) {
3751                 folder->last_seen_separator = imap_refresh_path_separator(session, folder, "INBOX", ok);
3752         }
3753
3754         if (folder->last_seen_separator != 0) {
3755                 debug_print("using separator: %c\n", folder->last_seen_separator);
3756                 return folder->last_seen_separator;
3757         }
3758
3759         return separator;
3760 }
3761
3762 static gchar *imap_get_real_path(IMAPSession *session, IMAPFolder *folder, const gchar *path, gint *ok)
3763 {
3764         gchar *real_path = NULL;
3765         gchar separator;
3766
3767         g_return_val_if_fail(folder != NULL, NULL);
3768         g_return_val_if_fail(path != NULL, NULL);
3769
3770         *ok = MAILIMAP_NO_ERROR;
3771
3772         real_path = imap_utf8_to_modified_utf7(path, FALSE);
3773         separator = imap_get_path_separator(session, folder, path, ok);
3774         if (*ok == MAILIMAP_NO_ERROR)
3775                 imap_path_separator_subst(real_path, separator);
3776
3777         return real_path;
3778 }
3779
3780 static gint imap_set_message_flags(IMAPSession *session,
3781                                    IMAPFolderItem *item,
3782                                    MsgNumberList *numlist,
3783                                    IMAPFlags flags,
3784                                    GSList *tags,
3785                                    gboolean is_set)
3786 {
3787         gint ok = 0;
3788         GSList *seq_list;
3789         GSList * cur;
3790         gint total = 0;
3791         IMAPFolder *folder = NULL;
3792         GSList *sorted_list = NULL;
3793
3794         if (numlist == NULL || session == NULL)
3795                 return MAILIMAP_ERROR_BAD_STATE;
3796
3797         folder = IMAP_FOLDER(session->folder);
3798
3799         sorted_list = g_slist_copy(numlist);
3800         sorted_list = g_slist_sort(sorted_list, g_int_compare);
3801
3802         cur = g_slist_last(sorted_list);
3803
3804         if (cur)
3805                 total = GPOINTER_TO_INT(cur->data);
3806
3807         seq_list = imap_get_lep_set_from_numlist(IMAP_FOLDER(session->folder), sorted_list);
3808
3809         statusbar_print_all(_("Flagging messages..."));
3810
3811         for(cur = seq_list ; cur != NULL ; cur = g_slist_next(cur)) {
3812                 struct mailimap_set * imapset = (struct mailimap_set *)cur->data;
3813                 struct mailimap_set_item *set_item = NULL;
3814
3815                 if (imapset->set_list)
3816                         set_item = clist_content(clist_begin(imapset->set_list));
3817                 else
3818                         continue;
3819
3820                 if (set_item == NULL)
3821                         continue;
3822
3823                 statusbar_progress_all(set_item->set_first, total, 1);
3824
3825                 ok = imap_cmd_store(session, item, imapset,
3826                                     flags, tags, is_set);
3827                 statusbar_progress_all(set_item->set_last, total, 1);
3828                 if (ok != MAILIMAP_NO_ERROR && folder->max_set_size > 20) {
3829                         /* reduce max set size */
3830                         folder->max_set_size /= 2;
3831                 }
3832                 if (ok != MAILIMAP_NO_ERROR && is_fatal(ok)) {
3833                         break;
3834                 }
3835         }
3836
3837         g_slist_free(sorted_list);
3838
3839         statusbar_progress_all(0,0,0);
3840         statusbar_pop_all();
3841
3842         imap_lep_set_free(seq_list);
3843
3844         return ok;
3845 }
3846
3847 typedef struct _select_data {
3848         IMAPSession *session;
3849         gchar *real_path;
3850         gint *exists;
3851         gint *recent;
3852         gint *unseen;
3853         guint32 *uid_validity;
3854         gboolean done;
3855 } select_data;
3856
3857 static gint imap_select(IMAPSession *session, IMAPFolder *folder,
3858                         FolderItem *item,
3859                         gint *exists, gint *recent, gint *unseen,
3860                         guint32 *uid_validity, gint *can_create_flags,
3861                         gboolean block)
3862 {
3863         gchar *real_path;
3864         gint ok = MAILIMAP_NO_ERROR;
3865         gint exists_, recent_, unseen_;
3866         guint32 uid_validity_;
3867         gint can_create_flags_;
3868         const gchar *path = item ? item->path:NULL;
3869
3870         if (!item) {
3871                 return MAILIMAP_ERROR_BAD_STATE;
3872         }
3873
3874         if (!exists && !recent && !unseen && !uid_validity && !can_create_flags) {
3875                 if (session->mbox && strcmp(session->mbox, path) == 0)
3876                         return MAILIMAP_NO_ERROR;
3877         }
3878         if (!exists && !recent && !unseen && !uid_validity && can_create_flags) {
3879                 if (session->mbox && strcmp(session->mbox, path) == 0) {
3880                         if (IMAP_FOLDER_ITEM(item)->can_create_flags != ITEM_CAN_CREATE_FLAGS_UNKNOWN)
3881                                 return MAILIMAP_NO_ERROR;
3882                 }
3883         }
3884         if (!exists)
3885                 exists = &exists_;
3886         if (!recent)
3887                 recent = &recent_;
3888         if (!unseen)
3889                 unseen = &unseen_;
3890         if (!uid_validity)
3891                 uid_validity = &uid_validity_;
3892         if (!can_create_flags)
3893                 can_create_flags = &can_create_flags_;
3894
3895         g_free(session->mbox);
3896         session->mbox = NULL;
3897         session->exists = 0;
3898         session->recent = 0;
3899         session->expunge = 0;
3900
3901         real_path = imap_get_real_path(session, folder, path, &ok);
3902         if (is_fatal(ok)) {
3903                 g_free(real_path);
3904                 return ok;
3905         }
3906         g_slist_free(IMAP_FOLDER_ITEM(item)->ok_flags);
3907         IMAP_FOLDER_ITEM(item)->ok_flags = NULL;
3908         ok = imap_cmd_select(session, real_path,
3909                              exists, recent, unseen, uid_validity, can_create_flags,
3910                              &(IMAP_FOLDER_ITEM(item)->ok_flags), block);
3911         if (ok != MAILIMAP_NO_ERROR) {
3912                 log_warning(LOG_PROTOCOL, _("can't select folder: %s\n"), real_path);
3913         } else {
3914                 session->mbox = g_strdup(path);
3915                 session->folder_content_changed = FALSE;
3916                 session->exists = *exists;
3917                 session->recent = *recent;
3918                 session->expunge = 0;
3919                 session->unseen = *unseen;
3920                 session->uid_validity = *uid_validity;
3921                 debug_print("select: exists %d recent %d expunge %d uid_validity %d can_create_flags %d\n",
3922                         session->exists, session->recent, session->expunge,
3923                         session->uid_validity, *can_create_flags);
3924         }
3925         if (*can_create_flags) {
3926                 IMAP_FOLDER_ITEM(item)->can_create_flags = ITEM_CAN_CREATE_FLAGS;
3927         } else {
3928                 IMAP_FOLDER_ITEM(item)->can_create_flags = ITEM_CANNOT_CREATE_FLAGS;
3929         }
3930         g_free(real_path);
3931
3932         return ok;
3933 }
3934
3935 static gint imap_status(IMAPSession *session, IMAPFolder *folder,
3936                         const gchar *path, IMAPFolderItem *item,
3937                         gint *messages,
3938                         guint32 *uid_next, guint32 *uid_validity,
3939                         gint *unseen, gboolean block)
3940 {
3941         int r = MAILIMAP_NO_ERROR;
3942         clistiter * iter;
3943         struct mailimap_mailbox_data_status * data_status;
3944         int got_values;
3945         gchar *real_path;
3946         guint mask = 0;
3947
3948         real_path = imap_get_real_path(session, folder, path, &r);
3949         if (is_fatal(r)) {
3950                 g_free(real_path);
3951                 return r;
3952         }
3953         if (messages) {
3954                 mask |= 1 << 0;
3955                 *messages = 0;
3956         }
3957         if (uid_next) {
3958                 mask |= 1 << 2;
3959                 *uid_next = 0;
3960         }
3961         if (uid_validity) {
3962                 mask |= 1 << 3;
3963                 *uid_validity = 0;
3964         }
3965         if (unseen) {
3966                 mask |= 1 << 4;
3967                 *unseen = 0;
3968         }
3969
3970         if (session->mbox != NULL &&
3971             !strcmp(session->mbox, item->item.path)) {
3972                 r = imap_cmd_close(session);
3973                 if (r != MAILIMAP_NO_ERROR) {
3974                         debug_print("close err %d\n", r);
3975                         g_free(real_path);
3976                         return r;
3977                 }
3978         }
3979
3980         r = imap_threaded_status(FOLDER(folder), real_path,
3981                 &data_status, mask);
3982
3983         g_free(real_path);
3984         if (r != MAILIMAP_NO_ERROR) {
3985                 imap_handle_error(SESSION(session), NULL, r);
3986                 debug_print("status err %d\n", r);
3987                 return r;
3988         }
3989
3990         if (data_status == NULL || data_status->st_info_list == NULL) {
3991                 debug_print("data_status %p\n", data_status);
3992                 if (data_status) {
3993                         debug_print("data_status->st_info_list %p\n", data_status->st_info_list);
3994                         mailimap_mailbox_data_status_free(data_status);
3995                 }
3996                 return MAILIMAP_ERROR_BAD_STATE;
3997         }
3998
3999         got_values = 0;
4000         if (data_status->st_info_list) {
4001                 for(iter = clist_begin(data_status->st_info_list) ; iter != NULL ;
4002                     iter = clist_next(iter)) {
4003                         struct mailimap_status_info * info;
4004
4005                         info = clist_content(iter);
4006                         switch (info->st_att) {
4007                         case MAILIMAP_STATUS_ATT_MESSAGES:
4008                                 if (messages) {
4009                                         * messages = info->st_value;
4010                                         got_values |= 1 << 0;
4011                                 }
4012                                 break;
4013
4014                         case MAILIMAP_STATUS_ATT_UIDNEXT:
4015                                 if (uid_next) {
4016                                         * uid_next = info->st_value;
4017                                         got_values |= 1 << 2;
4018                                 }
4019                                 break;
4020
4021                         case MAILIMAP_STATUS_ATT_UIDVALIDITY:
4022                                 if (uid_validity) {
4023                                         * uid_validity = info->st_value;
4024                                         got_values |= 1 << 3;
4025                                 }
4026                                 break;
4027
4028                         case MAILIMAP_STATUS_ATT_UNSEEN:
4029                                 if (unseen) {
4030                                         * unseen = info->st_value;
4031                                         got_values |= 1 << 4;
4032                                 }
4033                                 break;
4034                         }
4035                 }
4036         }
4037         mailimap_mailbox_data_status_free(data_status);
4038
4039         if (got_values != mask) {
4040                 g_warning("status: incomplete values received (%d)", got_values);
4041         }
4042         return MAILIMAP_NO_ERROR;
4043 }
4044
4045 static void imap_free_capabilities(IMAPSession *session)
4046 {
4047         slist_free_strings_full(session->capability);
4048         session->capability = NULL;
4049 }
4050
4051 /* low-level IMAP4rev1 commands */
4052
4053 static gint imap_cmd_login(IMAPSession *session,
4054                            const gchar *user, const gchar *pass,
4055                            const gchar *type)
4056 {
4057         int r;
4058         gint ok;
4059
4060         if (!strcmp(type, "LOGIN") && imap_has_capability(session, "LOGINDISABLED")) {
4061                 gint ok = MAILIMAP_ERROR_BAD_STATE;
4062                 if (imap_has_capability(session, "STARTTLS")) {
4063 #ifdef USE_GNUTLS
4064                         log_warning(LOG_PROTOCOL, _("Server requires TLS to log in.\n"));
4065                         ok = imap_cmd_starttls(session);
4066                         if (ok != MAILIMAP_NO_ERROR) {
4067                                 log_warning(LOG_PROTOCOL, _("Can't start TLS session.\n"));
4068                                 return ok;
4069                         } else {
4070                                 /* refresh capas */
4071                                 imap_free_capabilities(session);
4072                                 if ((r = imap_get_capabilities(session)) != MAILIMAP_NO_ERROR) {
4073                                         imap_handle_error(SESSION(session), NULL, r);
4074                                         log_warning(LOG_PROTOCOL, _("Can't refresh capabilities.\n"));
4075                                         return r;
4076                                 }
4077                         }
4078 #else
4079                         log_error(LOG_PROTOCOL, _("Connection to %s failed: "
4080                                         "server requires TLS, but Claws Mail "
4081                                         "has been compiled without TLS "
4082                                         "support.\n"),
4083                                         SESSION(session)->server);
4084                         return MAILIMAP_ERROR_LOGIN;
4085 #endif
4086                 } else {
4087                         log_error(LOG_PROTOCOL, _("Server logins are disabled.\n"));
4088                         return MAILIMAP_ERROR_LOGIN;
4089                 }
4090         }
4091
4092         log_print(LOG_PROTOCOL, "IMAP4> Logging %s to %s using %s\n",
4093                         user,
4094                         SESSION(session)->server,
4095                         type);
4096         r = imap_threaded_login(session->folder, user, pass, type);
4097         if (r != MAILIMAP_NO_ERROR) {
4098                 imap_handle_error(SESSION(session), NULL, r);
4099                 log_print(LOG_PROTOCOL, "IMAP4< Error logging in to %s\n",
4100                                 SESSION(session)->server);
4101                 ok = r;
4102         } else {
4103                 log_print(LOG_PROTOCOL, "IMAP4< Login to %s successful\n",
4104                                 SESSION(session)->server);
4105                 ok = MAILIMAP_NO_ERROR;
4106         }
4107         return ok;
4108 }
4109
4110 static gint imap_cmd_noop(IMAPSession *session)
4111 {
4112         int r;
4113         unsigned int exists, recent, expunge, unseen, uidnext, uidval;
4114
4115         r = imap_threaded_noop(session->folder, &exists, &recent, &expunge, &unseen, &uidnext, &uidval);
4116         if (r != MAILIMAP_NO_ERROR) {
4117                 imap_handle_error(SESSION(session), NULL, r);
4118                 debug_print("noop err %d\n", r);
4119                 return r;
4120         }
4121
4122         if ((exists && exists != session->exists)
4123          || (recent && recent != session->recent)
4124          || (expunge && expunge != session->expunge)
4125          || (unseen && unseen != session->unseen)) {
4126                 session->folder_content_changed = TRUE;
4127         }
4128         if (uidnext != 0 && uidnext != session->uid_next) {
4129                 session->uid_next = uidnext;
4130                 session->folder_content_changed = TRUE;
4131         }
4132         if (uidval != 0 && uidval != session->uid_validity) {
4133                 session->uid_validity = uidval;
4134                 session->folder_content_changed = TRUE;
4135         }
4136
4137         session->exists = exists;
4138         session->recent = recent;
4139         session->expunge = expunge;
4140         session->unseen = unseen;
4141
4142         session_set_access_time(SESSION(session));
4143
4144         return MAILIMAP_NO_ERROR;
4145 }
4146
4147 #ifdef USE_GNUTLS
4148 static gint imap_cmd_starttls(IMAPSession *session)
4149 {
4150         int r;
4151
4152         r = imap_threaded_starttls(session->folder,
4153                 SESSION(session)->server, SESSION(session)->port);
4154         if (r != MAILIMAP_NO_ERROR) {
4155                 imap_handle_error(SESSION(session), NULL, r);
4156                 debug_print("starttls err %d\n", r);
4157                 return r;
4158         }
4159         return MAILIMAP_NO_ERROR;
4160 }
4161 #endif
4162
4163 static gint imap_cmd_select(IMAPSession *session, const gchar *folder,
4164                             gint *exists, gint *recent, gint *unseen,
4165                             guint32 *uid_validity, gint *can_create_flags,
4166                             GSList **ok_flags, gboolean block)
4167 {
4168         int r;
4169
4170         r = imap_threaded_select(session->folder, folder,
4171                                  exists, recent, unseen, uid_validity, can_create_flags, ok_flags);
4172         if (r != MAILIMAP_NO_ERROR) {
4173                 imap_handle_error(SESSION(session), NULL, r);
4174                 debug_print("select err %d\n", r);
4175                 return r;
4176         }
4177         return MAILIMAP_NO_ERROR;
4178 }
4179
4180 static gint imap_cmd_close(IMAPSession *session)
4181 {
4182         int r;
4183
4184         r = imap_threaded_close(session->folder);
4185         if (r != MAILIMAP_NO_ERROR) {
4186                 imap_handle_error(SESSION(session), NULL, r);
4187                 debug_print("close err %d\n", r);
4188                 return r;
4189         }
4190         g_free(session->mbox);
4191         session->mbox = NULL;
4192         session->exists = 0;
4193         session->recent = 0;
4194         session->expunge = 0;
4195         return MAILIMAP_NO_ERROR;
4196 }
4197
4198 static gint imap_cmd_examine(IMAPSession *session, const gchar *folder,
4199                              gint *exists, gint *recent, gint *unseen,
4200                              guint32 *uid_validity, gboolean block)
4201 {
4202         int r;
4203
4204         r = imap_threaded_examine(session->folder, folder,
4205                                   exists, recent, unseen, uid_validity);
4206         if (r != MAILIMAP_NO_ERROR) {
4207                 imap_handle_error(SESSION(session), NULL, r);
4208                 debug_print("examine err %d\n", r);
4209
4210                 return r;
4211         }
4212         return MAILIMAP_NO_ERROR;
4213 }
4214
4215 static gint imap_cmd_create(IMAPSession *session, const gchar *folder)
4216 {
4217         int r;
4218
4219         r = imap_threaded_create(session->folder, 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_rename(IMAPSession *session, const gchar *old_folder,
4229                             const gchar *new_folder)
4230 {
4231         int r;
4232
4233         r = imap_threaded_rename(session->folder, old_folder,
4234                                  new_folder);
4235         if (r != MAILIMAP_NO_ERROR) {
4236                 imap_handle_error(SESSION(session), NULL, r);
4237                 return r;
4238         }
4239
4240         return MAILIMAP_NO_ERROR;
4241 }
4242
4243 static gint imap_cmd_delete(IMAPSession *session, const gchar *folder)
4244 {
4245         int r;
4246
4247
4248         r = imap_threaded_delete(session->folder, folder);
4249         if (r != MAILIMAP_NO_ERROR) {
4250                 imap_handle_error(SESSION(session), NULL, r);
4251                 return r;
4252         }
4253
4254         return MAILIMAP_NO_ERROR;
4255 }
4256
4257 typedef struct _fetch_data {
4258         IMAPSession *session;
4259         guint32 uid;
4260         const gchar *filename;
4261         gboolean headers;
4262         gboolean body;
4263         gboolean done;
4264 } fetch_data;
4265
4266 static void *imap_cmd_fetch_thread(void *data)
4267 {
4268         fetch_data *stuff = (fetch_data *)data;
4269         IMAPSession *session = stuff->session;
4270         guint32 uid = stuff->uid;
4271         const gchar *filename = stuff->filename;
4272         int r;
4273
4274         if (stuff->body) {
4275                 r = imap_threaded_fetch_content(session->folder,
4276                                                uid, 1, filename);
4277         }
4278         else {
4279                 r = imap_threaded_fetch_content(session->folder,
4280                                                 uid, 0, filename);
4281         }
4282         if (r != MAILIMAP_NO_ERROR) {
4283                 imap_handle_error(SESSION(session), NULL, r);
4284                 debug_print("fetch err %d\n", r);
4285                 return GINT_TO_POINTER(r);
4286         }
4287         return GINT_TO_POINTER(MAILIMAP_NO_ERROR);
4288 }
4289
4290 static gint imap_cmd_fetch(IMAPSession *session, guint32 uid,
4291                                 const gchar *filename, gboolean headers,
4292                                 gboolean body)
4293 {
4294         fetch_data *data = g_new0(fetch_data, 1);
4295         int result = 0;
4296         data->done = FALSE;
4297         data->session = session;
4298         data->uid = uid;
4299         data->filename = filename;
4300         data->headers = headers;
4301         data->body = body;
4302
4303         if (prefs_common.work_offline &&
4304             !inc_offline_should_override(FALSE,
4305                 _("Claws Mail needs network access in order "
4306                   "to access the IMAP server."))) {
4307                 g_free(data);
4308                 return -1;
4309         }
4310         statusbar_print_all(_("Fetching message..."));
4311         result = GPOINTER_TO_INT(imap_cmd_fetch_thread(data));
4312         statusbar_pop_all();
4313         g_free(data);
4314         return result;
4315 }
4316
4317
4318 static gint imap_cmd_append(IMAPSession *session,
4319                             IMAPFolderItem *item,
4320                             const gchar *destfolder,
4321                             const gchar *file, IMAPFlags flags,
4322                             guint32 *new_uid)
4323 {
4324         struct mailimap_flag_list * flag_list;
4325         int r;
4326
4327         cm_return_val_if_fail(file != NULL, MAILIMAP_ERROR_BAD_STATE);
4328
4329         flag_list = imap_flag_to_lep(item, flags, NULL);
4330         lock_session(session);
4331         r = imap_threaded_append(session->folder, destfolder,
4332                          file, flag_list, (int *)new_uid);
4333         mailimap_flag_list_free(flag_list);
4334
4335         if (r != MAILIMAP_NO_ERROR) {
4336                 imap_handle_error(SESSION(session), NULL, r);
4337                 debug_print("append err %d\n", r);
4338                 return r;
4339         }
4340
4341         unlock_session(session);
4342
4343         return MAILIMAP_NO_ERROR;
4344 }
4345
4346 static gint imap_cmd_copy(IMAPSession *session, struct mailimap_set * set,
4347                           const gchar *destfolder,
4348                           struct mailimap_set **source, struct mailimap_set **dest)
4349 {
4350         int r;
4351
4352         g_return_val_if_fail(session != NULL, MAILIMAP_ERROR_BAD_STATE);
4353         g_return_val_if_fail(set != NULL, MAILIMAP_ERROR_BAD_STATE);
4354         g_return_val_if_fail(destfolder != NULL, MAILIMAP_ERROR_BAD_STATE);
4355
4356         r = imap_threaded_copy(session->folder, set, destfolder, source, dest);
4357         if (r != MAILIMAP_NO_ERROR) {
4358                 imap_handle_error(SESSION(session), NULL, r);
4359                 return r;
4360         }
4361
4362         return MAILIMAP_NO_ERROR;
4363 }
4364
4365 static gint imap_cmd_store(IMAPSession *session,
4366                            IMAPFolderItem *item,
4367                            struct mailimap_set * set,
4368                            IMAPFlags flags, GSList *tags, int do_add)
4369 {
4370         int r;
4371         struct mailimap_flag_list * flag_list = NULL;
4372         struct mailimap_store_att_flags * store_att_flags;
4373
4374         flag_list = imap_flag_to_lep(item, flags, tags);
4375
4376         if (do_add)
4377                 store_att_flags =
4378                         mailimap_store_att_flags_new_add_flags_silent(flag_list);
4379         else
4380                 store_att_flags =
4381                         mailimap_store_att_flags_new_remove_flags_silent(flag_list);
4382
4383         r = imap_threaded_store(session->folder, set, store_att_flags);
4384         mailimap_store_att_flags_free(store_att_flags);
4385         if (r != MAILIMAP_NO_ERROR) {
4386                 imap_handle_error(SESSION(session), NULL, r);
4387                 return r;
4388         }
4389
4390         return MAILIMAP_NO_ERROR;
4391 }
4392
4393 static gint imap_cmd_expunge(IMAPSession *session, gboolean do_expunge)
4394 {
4395         int r;
4396
4397         if (!do_expunge)
4398                 return MAILIMAP_NO_ERROR;
4399
4400         if (prefs_common.work_offline &&
4401             !inc_offline_should_override(FALSE,
4402                 _("Claws Mail needs network access in order "
4403                   "to access the IMAP server."))) {
4404                 return -1;
4405         }
4406
4407         r = imap_threaded_expunge(session->folder);
4408         if (r != MAILIMAP_NO_ERROR) {
4409                 imap_handle_error(SESSION(session), NULL, r);
4410                 return r;
4411         }
4412
4413         return MAILIMAP_NO_ERROR;
4414 }
4415
4416 gint imap_expunge(Folder *folder, FolderItem *item)
4417 {
4418         IMAPSession *session = imap_session_get(folder);
4419         if (session == NULL)
4420                 return -1;
4421
4422         return imap_cmd_expunge(session, TRUE);
4423 }
4424
4425 static void imap_path_separator_subst(gchar *str, gchar separator)
4426 {
4427         gchar *p;
4428         gboolean in_escape = FALSE;
4429
4430         if (!separator || separator == '/') return;
4431
4432         for (p = str; *p != '\0'; p++) {
4433                 if (*p == '/' && !in_escape)
4434                         *p = separator;
4435                 else if (*p == '&' && *(p + 1) != '-' && !in_escape)
4436                         in_escape = TRUE;
4437                 else if (*p == '-' && in_escape)
4438                         in_escape = FALSE;
4439         }
4440 }
4441
4442 static gboolean imap_rename_folder_func(GNode *node, gpointer data)
4443 {
4444         FolderItem *item = node->data;
4445         gchar **paths = data;
4446         const gchar *oldpath = paths[0];
4447         const gchar *newpath = paths[1];
4448         gchar *real_oldpath, *real_newpath;
4449         gchar *base;
4450         gchar *new_itempath;
4451         gint oldpathlen;
4452         IMAPSession *session = imap_session_get(item->folder);
4453         gint ok = MAILIMAP_NO_ERROR;
4454         oldpathlen = strlen(oldpath);
4455         if (strncmp(oldpath, item->path, oldpathlen) != 0) {
4456                 g_warning("path doesn't match: %s, %s", oldpath, item->path);
4457                 return TRUE;
4458         }
4459
4460         base = item->path + oldpathlen;
4461         while (*base == G_DIR_SEPARATOR) base++;
4462         if (*base == '\0')
4463                 new_itempath = g_strdup(newpath);
4464         else
4465                 new_itempath = g_strconcat(newpath, G_DIR_SEPARATOR_S, base,
4466                                            NULL);
4467
4468         real_oldpath = imap_get_real_path(session, IMAP_FOLDER(item->folder), item->path, &ok);
4469         g_free(item->path);
4470         item->path = new_itempath;
4471
4472         real_newpath = imap_get_real_path(session, IMAP_FOLDER(item->folder), item->path, &ok);
4473
4474         imap_threaded_subscribe(item->folder, real_oldpath, FALSE);
4475         imap_threaded_subscribe(item->folder, real_newpath, TRUE);
4476
4477         g_free(real_oldpath);
4478         g_free(real_newpath);
4479         return FALSE;
4480 }
4481
4482 static gint get_list_of_uids(IMAPSession *session, Folder *folder, IMAPFolderItem *item, GSList **msgnum_list)
4483 {
4484         GSList *uidlist, *elem;
4485         int r = -1;
4486         clist * lep_uidlist;
4487         gint ok, nummsgs = 0;
4488
4489         if (session == NULL) {
4490                 return -1;
4491         }
4492
4493         ok = imap_select(session, IMAP_FOLDER(folder), FOLDER_ITEM(item),
4494                          NULL, NULL, NULL, NULL, NULL, TRUE);
4495         if (ok != MAILIMAP_NO_ERROR) {
4496                 return -1;
4497         }
4498
4499         g_slist_free(item->uid_list);
4500         item->uid_list = NULL;
4501
4502         uidlist = NULL;
4503
4504         if (folder->account && folder->account->low_bandwidth) {
4505                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SIMPLE,
4506                                 NULL, NULL, NULL, &lep_uidlist);
4507         }
4508
4509         if (r == MAILIMAP_NO_ERROR) {
4510                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
4511                 mailimap_search_result_free(lep_uidlist);
4512         } else {
4513                 carray * lep_uidtab;
4514                 if (r != -1) { /* inited */
4515                         imap_handle_error(SESSION(session), NULL, r);
4516                         if (is_fatal(r))
4517                                 return -1;
4518                 }
4519                 r = imap_threaded_fetch_uid(folder, 1,
4520                                     &lep_uidtab);
4521                 if (r == MAILIMAP_NO_ERROR) {
4522                         uidlist = imap_uid_list_from_lep_tab(lep_uidtab);
4523                         imap_fetch_uid_list_free(lep_uidtab);
4524                 }
4525         }
4526
4527         if (r != MAILIMAP_NO_ERROR) {
4528                 imap_handle_error(SESSION(session), NULL, r);
4529                 return -1;
4530         }
4531
4532         for (elem = uidlist; elem != NULL; elem = g_slist_next(elem)) {
4533                 guint msgnum;
4534
4535                 msgnum = GPOINTER_TO_INT(elem->data);
4536
4537                 *msgnum_list = g_slist_prepend(*msgnum_list, GINT_TO_POINTER(msgnum));
4538                 item->uid_list = g_slist_prepend(item->uid_list, GINT_TO_POINTER(msgnum));
4539                 nummsgs++;
4540         }
4541         g_slist_free(uidlist);
4542
4543         unlock_session(session); /* locked from imap_get_num_list */
4544
4545         return nummsgs;
4546
4547 }
4548
4549 gint imap_get_num_list(Folder *folder, FolderItem *_item, GSList **msgnum_list, gboolean *old_uids_valid)
4550 {
4551         IMAPFolderItem *item = (IMAPFolderItem *)_item;
4552         IMAPSession *session;
4553         gint nummsgs;
4554         GSList *uidlist = NULL;
4555         gchar *dir;
4556         gint known_list_len = 0;
4557         gchar *path;
4558
4559         debug_print("get_num_list\n");
4560
4561         g_return_val_if_fail(folder != NULL, -1);
4562         g_return_val_if_fail(item != NULL, -1);
4563         g_return_val_if_fail(item->item.path != NULL, -1);
4564         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
4565         g_return_val_if_fail(folder->account != NULL, -1);
4566
4567         known_list_len = g_slist_length(item->uid_list);
4568         if (!item->should_update) {
4569                 debug_print("get_num_list: nothing to update\n");
4570                 *old_uids_valid = TRUE;
4571                 if (known_list_len == item->item.total_msgs
4572                  && known_list_len > 0) {
4573                         *msgnum_list = g_slist_copy(item->uid_list);
4574                         return known_list_len;
4575                 } else {
4576                         debug_print("don't know the list length...\n");
4577                 }
4578         }
4579
4580         if (prefs_common.work_offline &&
4581             !inc_offline_should_override(FALSE,
4582                 _("Claws Mail needs network access in order "
4583                   "to access the IMAP server."))) {
4584                 return -1;
4585         }
4586
4587         path = folder_item_get_path(_item);
4588         if (!is_dir_exist(path)) {
4589                 if(is_file_exist(path))
4590                         claws_unlink(path);
4591                 make_dir_hier(path);
4592         }
4593         g_free(path);
4594
4595         debug_print("getting session...\n");
4596         session = imap_session_get(folder);
4597         g_return_val_if_fail(session != NULL, -1);
4598
4599         lock_session(session); /* unlocked by get_list_of_uids */
4600         if (FOLDER_ITEM(item)->path)
4601                 statusbar_print_all(_("Scanning folder %s%c%s..."),
4602                                       FOLDER_ITEM(item)->folder->name,
4603                                       G_DIR_SEPARATOR,
4604                                       FOLDER_ITEM(item)->path);
4605         else
4606                 statusbar_print_all(_("Scanning folder %s..."),
4607                                       FOLDER_ITEM(item)->folder->name);
4608
4609         if (item->should_trash_cache) {
4610                 *old_uids_valid = FALSE;
4611                 debug_print("get_num_list: trashing num list\n");
4612                 debug_print("Freeing imap uid cache\n");
4613                 item->lastuid = 0;
4614                 g_slist_free(item->uid_list);
4615                 item->uid_list = NULL;
4616
4617                 imap_delete_all_cached_messages((FolderItem *)item);
4618         } else {
4619                 debug_print("get_num_list: updating num list\n");
4620                 *old_uids_valid = TRUE;
4621         }
4622
4623         nummsgs = get_list_of_uids(session, folder, item, &uidlist);
4624         /* session could be broken now, in case of fatal error */
4625
4626         debug_print("get_num_list: got %d msgs\n", nummsgs);
4627
4628         if (nummsgs < 0) {
4629                 statusbar_pop_all();
4630                 return -1;
4631         }
4632
4633         *msgnum_list = uidlist;
4634
4635         dir = folder_item_get_path((FolderItem *)item);
4636         debug_print("removing old messages from %s\n", dir);
4637         remove_numbered_files_not_in_list(dir, *msgnum_list);
4638         g_free(dir);
4639
4640         debug_print("get_num_list - ok - %i\n", nummsgs);
4641         statusbar_pop_all();
4642         item->should_trash_cache = FALSE;
4643         item->should_update = FALSE;
4644         return nummsgs;
4645 }
4646
4647 static MsgInfo *imap_parse_msg(const gchar *file, FolderItem *item)
4648 {
4649         MsgInfo *msginfo;
4650         MsgFlags flags;
4651
4652         flags.perm_flags = MSG_NEW|MSG_UNREAD;
4653         flags.tmp_flags = 0;
4654
4655         g_return_val_if_fail(item != NULL, NULL);
4656         g_return_val_if_fail(file != NULL, NULL);
4657
4658         if (folder_has_parent_of_type(item, F_QUEUE)) {
4659                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
4660         } else if (folder_has_parent_of_type(item, F_DRAFT)) {
4661                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
4662         }
4663
4664         msginfo = procheader_parse_file(file, flags, FALSE, FALSE);
4665         if (!msginfo) return NULL;
4666
4667         msginfo->plaintext_file = g_strdup(file);
4668         msginfo->folder = item;
4669
4670         return msginfo;
4671 }
4672
4673 GSList *imap_get_msginfos(Folder *folder, FolderItem *item,
4674                           GSList *msgnum_list)
4675 {
4676         IMAPSession *session;
4677         MsgInfoList *ret = NULL;
4678         gint ok;
4679
4680         debug_print("get_msginfos\n");
4681
4682         g_return_val_if_fail(folder != NULL, NULL);
4683         g_return_val_if_fail(item != NULL, NULL);
4684         g_return_val_if_fail(msgnum_list != NULL, NULL);
4685
4686         debug_print("getting session...\n");
4687         session = imap_session_get(folder);
4688         g_return_val_if_fail(session != NULL, NULL);
4689
4690         lock_session(session); /* unlocked later in the function */
4691
4692         debug_print("IMAP getting msginfos\n");
4693         ok = imap_select(session, IMAP_FOLDER(folder), item,
4694                          NULL, NULL, NULL, NULL, NULL, FALSE);
4695         if (ok != MAILIMAP_NO_ERROR) {
4696                 return NULL;
4697         }
4698         if (!(folder_has_parent_of_type(item, F_DRAFT) ||
4699               folder_has_parent_of_type(item, F_QUEUE))) {
4700                 ret = g_slist_concat(ret,
4701                         imap_get_uncached_messages(session, item,
4702                                                    msgnum_list, &ok));
4703                 if (ok != MAILIMAP_NO_ERROR)
4704                         return NULL;
4705                 unlock_session(session);
4706         } else {
4707                 MsgNumberList *sorted_list, *elem, *llast = NULL;
4708                 gint startnum, lastnum;
4709
4710                 unlock_session(session);
4711
4712                 sorted_list = g_slist_sort(g_slist_copy(msgnum_list), g_int_compare);
4713
4714                 startnum = lastnum = GPOINTER_TO_INT(sorted_list->data);
4715
4716                 llast = g_slist_last(ret);
4717                 for (elem = sorted_list;; elem = g_slist_next(elem)) {
4718                         guint num = 0;
4719
4720                         if (elem)
4721                                 num = GPOINTER_TO_INT(elem->data);
4722
4723                         if (num > lastnum + 1 || elem == NULL) {
4724                                 int i;
4725                                 for (i = startnum; i <= lastnum; ++i) {
4726                                         gchar *file;
4727                                         file = imap_fetch_msg(folder, item, i);
4728                                         if (file != NULL) {
4729                                                 MsgInfo *msginfo = imap_parse_msg(file, item);
4730                                                 if (msginfo != NULL) {
4731                                                         msginfo->msgnum = i;
4732                                                         if (llast == NULL)
4733                                                                 llast = ret = g_slist_append(ret, msginfo);
4734                                                         else {
4735                                                                 llast = g_slist_append(llast, msginfo);
4736                                                                 llast = llast->next;
4737                                                         }
4738                                                 }
4739                                                 g_free(file);
4740                                         }
4741                                 }
4742
4743                                 if (elem == NULL)
4744                                         break;
4745
4746                                 startnum = num;
4747                         }
4748                         lastnum = num;
4749                 }
4750
4751                 g_slist_free(sorted_list);
4752         }
4753         return ret;
4754 }
4755
4756 MsgInfo *imap_get_msginfo(Folder *folder, FolderItem *item, gint uid)
4757 {
4758         MsgInfo *msginfo = NULL;
4759         MsgInfoList *msginfolist;
4760         MsgNumberList numlist;
4761
4762         numlist.next = NULL;
4763         numlist.data = GINT_TO_POINTER(uid);
4764
4765         msginfolist = imap_get_msginfos(folder, item, &numlist);
4766         if (msginfolist != NULL) {
4767                 msginfo = msginfolist->data;
4768                 g_slist_free(msginfolist);
4769         }
4770
4771         return msginfo;
4772 }
4773
4774 gboolean imap_scan_required(Folder *folder, FolderItem *_item)
4775 {
4776         IMAPSession *session;
4777         IMAPFolderItem *item = (IMAPFolderItem *)_item;
4778         gint ok, exists = 0, unseen = 0;
4779         guint32 uid_next = 0, uid_val = 0;
4780         gboolean selected_folder;
4781
4782         g_return_val_if_fail(folder != NULL, FALSE);
4783         g_return_val_if_fail(item != NULL, FALSE);
4784         g_return_val_if_fail(item->item.folder != NULL, FALSE);
4785         g_return_val_if_fail(FOLDER_CLASS(item->item.folder) == &imap_class, FALSE);
4786
4787         if (item->item.path == NULL)
4788                 return FALSE;
4789
4790         if (item->should_update) {
4791                 debug_print("scan already required\n");
4792                 return TRUE;
4793         }
4794         debug_print("getting session...\n");
4795         session = imap_session_get(folder);
4796
4797         g_return_val_if_fail(session != NULL, FALSE);
4798         lock_session(session); /* unlocked later in the function */
4799
4800         selected_folder = (session->mbox != NULL) &&
4801                           (!strcmp(session->mbox, item->item.path));
4802         if (selected_folder) {
4803                 if (!session->folder_content_changed) {
4804                         ok = imap_cmd_noop(session);
4805                         if (ok != MAILIMAP_NO_ERROR) {
4806                                 debug_print("disconnected!\n");
4807                                 if (!is_fatal(ok))
4808                                         session = imap_reconnect_if_possible(folder, session);
4809                                 else
4810                                         session = imap_session_get(folder);
4811                                 if (session == NULL)
4812                                         return FALSE;
4813                         }
4814
4815                         if (session->folder_content_changed) {
4816                                 debug_print("CHANGED (self-noop)! scan_required\n");
4817                                 item->should_update = TRUE;
4818                                 if (session->uid_validity && session->uid_validity != item->item.mtime) {
4819                                         item->item.mtime = session->uid_validity;
4820                                         item->should_trash_cache = TRUE;
4821                                 }
4822                                 unlock_session(session);
4823                                 return TRUE;
4824                         }
4825                 } else {
4826                         debug_print("CHANGED (previous noop)! scan_required\n");
4827                         item->should_update = TRUE;
4828                         if (session->uid_validity && session->uid_validity != item->item.mtime) {
4829                                 item->item.mtime = session->uid_validity;
4830                                 item->should_trash_cache = TRUE;
4831                         }
4832                         unlock_session(session);
4833                         return TRUE;
4834                 }
4835         } else {
4836                 ok = imap_status(session, IMAP_FOLDER(folder), item->item.path, IMAP_FOLDER_ITEM(item),
4837                                  &exists, &uid_next, &uid_val, &unseen, FALSE);
4838                 if (ok != MAILIMAP_NO_ERROR) {
4839                         return FALSE;
4840                 }
4841
4842                 debug_print("exists %d, item->item.total_msgs %d\n"
4843                             "\tunseen %d, item->item.unread_msgs %d\n"
4844                             "\tuid_next %d, item->uid_next %d\n"
4845                             "\tuid_val %d, item->item.mtime %ld\n",
4846                             exists, item->item.total_msgs, unseen, item->item.unread_msgs,
4847                             uid_next, item->uid_next, uid_val, (long)(item->item.mtime));
4848                 if (exists != item->item.total_msgs
4849                     || unseen != item->item.unread_msgs
4850                     || uid_next != item->uid_next
4851                     || uid_val != item->item.mtime) {
4852                         debug_print("CHANGED (status)! scan_required\n");
4853                         item->last_change = time(NULL);
4854                         item->should_update = TRUE;
4855                         item->uid_next = uid_next;
4856                         if (uid_val != item->item.mtime) {
4857                                 item->item.mtime = uid_val;
4858                                 item->should_trash_cache = TRUE;
4859                         }
4860                         unlock_session(session);
4861                         return TRUE;
4862                 }
4863         }
4864         unlock_session(session);
4865
4866         item->should_update = FALSE;
4867         return FALSE;
4868 }
4869
4870 void imap_change_flags(Folder *folder, FolderItem *item, MsgInfo *msginfo, MsgPermFlags newflags)
4871 {
4872         IMAPSession *session;
4873         IMAPFlags flags_set = 0, flags_unset = 0;
4874         gint ok = MAILIMAP_NO_ERROR;
4875         MsgNumberList numlist;
4876         hashtable_data *ht_data = NULL;
4877
4878         g_return_if_fail(folder != NULL);
4879         g_return_if_fail(folder->klass == &imap_class);
4880         g_return_if_fail(item != NULL);
4881         g_return_if_fail(item->folder == folder);
4882         g_return_if_fail(msginfo != NULL);
4883         g_return_if_fail(msginfo->folder == item);
4884
4885         if (!MSG_IS_MARKED(msginfo->flags) &&  (newflags & MSG_MARKED))
4886                 flags_set |= IMAP_FLAG_FLAGGED;
4887         if ( MSG_IS_MARKED(msginfo->flags) && !(newflags & MSG_MARKED))
4888                 flags_unset |= IMAP_FLAG_FLAGGED;
4889
4890         if (!MSG_IS_UNREAD(msginfo->flags) &&  (newflags & MSG_UNREAD))
4891                 flags_unset |= IMAP_FLAG_SEEN;
4892         if ( MSG_IS_UNREAD(msginfo->flags) && !(newflags & MSG_UNREAD))
4893                 flags_set |= IMAP_FLAG_SEEN;
4894
4895         if (!MSG_IS_REPLIED(msginfo->flags) &&  (newflags & MSG_REPLIED))
4896                 flags_set |= IMAP_FLAG_ANSWERED;
4897         if ( MSG_IS_REPLIED(msginfo->flags) && !(newflags & MSG_REPLIED))
4898                 flags_unset |= IMAP_FLAG_ANSWERED;
4899
4900         if (!MSG_IS_FORWARDED(msginfo->flags) &&  (newflags & MSG_FORWARDED))
4901                 flags_set |= IMAP_FLAG_FORWARDED;
4902         if ( MSG_IS_FORWARDED(msginfo->flags) && !(newflags & MSG_FORWARDED))
4903                 flags_unset |= IMAP_FLAG_FORWARDED;
4904
4905         if (!MSG_IS_SPAM(msginfo->flags) &&  (newflags & MSG_SPAM)) {
4906                 flags_set |= IMAP_FLAG_SPAM;
4907                 flags_unset |= IMAP_FLAG_HAM;
4908         }
4909         if ( MSG_IS_SPAM(msginfo->flags) && !(newflags & MSG_SPAM)) {
4910                 flags_set |= IMAP_FLAG_HAM;
4911                 flags_unset |= IMAP_FLAG_SPAM;
4912         }
4913         if (!MSG_IS_DELETED(msginfo->flags) &&  (newflags & MSG_DELETED))
4914                 flags_set |= IMAP_FLAG_DELETED;
4915         if ( MSG_IS_DELETED(msginfo->flags) && !(newflags & MSG_DELETED))
4916                 flags_unset |= IMAP_FLAG_DELETED;
4917
4918         if (!flags_set && !flags_unset) {
4919                 /* the changed flags were not translatable to IMAP-speak.
4920                  * like MSG_POSTFILTERED, so just apply. */
4921                 msginfo->flags.perm_flags = newflags;
4922                 return;
4923         }
4924
4925         debug_print("getting session...\n");
4926         session = imap_session_get(folder);
4927         if (!session) {
4928                 return;
4929         }
4930
4931         if ((ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
4932             NULL, NULL, NULL, NULL, NULL, FALSE)) != MAILIMAP_NO_ERROR) {
4933                 return;
4934         }
4935         numlist.next = NULL;
4936         numlist.data = GINT_TO_POINTER(msginfo->msgnum);
4937
4938         if (IMAP_FOLDER_ITEM(item)->batching) {
4939                 /* instead of performing an UID STORE command for each message change,
4940                  * as a lot of them can change "together", we just fill in hashtables
4941                  * and defer the treatment so that we're able to send only one
4942                  * command.
4943                  */
4944                 debug_print("IMAP batch mode on, deferring flags change\n");
4945                 if (flags_set) {
4946                         ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->flags_set_table,
4947                                 GINT_TO_POINTER(flags_set));
4948                         if (ht_data == NULL) {
4949                                 ht_data = g_new0(hashtable_data, 1);
4950                                 ht_data->item = IMAP_FOLDER_ITEM(item);
4951                                 g_hash_table_insert(IMAP_FOLDER_ITEM(item)->flags_set_table,
4952                                         GINT_TO_POINTER(flags_set), ht_data);
4953                         }
4954                         ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
4955                 }
4956                 if (flags_unset) {
4957                         ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->flags_unset_table,
4958                                 GINT_TO_POINTER(flags_unset));
4959                         if (ht_data == NULL) {
4960                                 ht_data = g_new0(hashtable_data, 1);
4961                                 ht_data->item = IMAP_FOLDER_ITEM(item);
4962                                 g_hash_table_insert(IMAP_FOLDER_ITEM(item)->flags_unset_table,
4963                                         GINT_TO_POINTER(flags_unset), ht_data);
4964                         }
4965                         ht_data->msglist = g_slist_prepend(ht_data->msglist,
4966                                         GINT_TO_POINTER(msginfo->msgnum));
4967                 }
4968         } else {
4969                 debug_print("IMAP changing flags\n");
4970                 if (flags_set) {
4971                         ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item), &numlist, flags_set, NULL, TRUE);
4972                         if (ok != MAILIMAP_NO_ERROR) {
4973                                 return;
4974                         }
4975                 }
4976
4977                 if (flags_unset) {
4978                         ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item), &numlist, flags_unset, NULL, FALSE);
4979                         if (ok != MAILIMAP_NO_ERROR) {
4980                                 return;
4981                         }
4982                 }
4983         }
4984         msginfo->flags.perm_flags = newflags;
4985         return;
4986 }
4987
4988 static gint imap_remove_msg(Folder *folder, FolderItem *item, gint uid)
4989 {
4990         gint ok;
4991         IMAPSession *session;
4992         gchar *dir;
4993         MsgNumberList numlist;
4994
4995         g_return_val_if_fail(folder != NULL, -1);
4996         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
4997         g_return_val_if_fail(item != NULL, -1);
4998
4999         debug_print("getting session...\n");
5000         session = imap_session_get(folder);
5001         if (!session) return -1;
5002
5003         ok = imap_select(session, IMAP_FOLDER(folder), item,
5004                          NULL, NULL, NULL, NULL, NULL, FALSE);
5005         if (ok != MAILIMAP_NO_ERROR) {
5006                 return ok;
5007         }
5008         numlist.next = NULL;
5009         numlist.data = GINT_TO_POINTER(uid);
5010
5011         ok = imap_set_message_flags
5012                 (session, IMAP_FOLDER_ITEM(item), &numlist, IMAP_FLAG_DELETED, NULL, TRUE);
5013         if (ok != MAILIMAP_NO_ERROR) {
5014                 log_warning(LOG_PROTOCOL, _("can't set deleted flags: %d\n"), uid);
5015                 return ok;
5016         }
5017
5018         ok = imap_cmd_expunge(session, folder->account->imap_use_trash);
5019
5020         if (ok != MAILIMAP_NO_ERROR) {
5021                 log_warning(LOG_PROTOCOL, _("can't expunge\n"));
5022                 return ok;
5023         }
5024
5025         IMAP_FOLDER_ITEM(item)->uid_list = g_slist_remove(
5026             IMAP_FOLDER_ITEM(item)->uid_list, numlist.data);
5027         dir = folder_item_get_path(item);
5028         if (is_dir_exist(dir))
5029                 remove_numbered_files(dir, uid, uid);
5030         g_free(dir);
5031         return MAILIMAP_NO_ERROR;
5032 }
5033
5034 static gint compare_msginfo(gconstpointer a, gconstpointer b)
5035 {
5036         return ((MsgInfo *)a)->msgnum - ((MsgInfo *)b)->msgnum;
5037 }
5038
5039 static guint gslist_find_next_num(MsgNumberList **list, guint num)
5040 {
5041         GSList *elem;
5042
5043         g_return_val_if_fail(list != NULL, -1);
5044
5045         for (elem = *list; elem != NULL; elem = g_slist_next(elem))
5046                 if (GPOINTER_TO_INT(elem->data) >= num)
5047                         break;
5048         *list = elem;
5049         return elem != NULL ? GPOINTER_TO_INT(elem->data) : (gint)-1;
5050 }
5051
5052 static gboolean flag_ok(IMAPFolderItem *item, guint flag)
5053 {
5054         if (item->ok_flags && g_slist_find(item->ok_flags, GUINT_TO_POINTER(flag))) {
5055                 debug_print("flag %d is OK\n", flag);
5056                 return TRUE;
5057         }
5058         if (item->can_create_flags == ITEM_CAN_CREATE_FLAGS) {
5059                 debug_print("creating flags is OK\n");
5060                 return TRUE;
5061         }
5062         return FALSE;
5063 }
5064
5065 /*
5066  * NEW and DELETED flags are not syncronized
5067  * - The NEW/RECENT flags in IMAP folders can not really be directly
5068  *   modified by Sylpheed
5069  * - The DELETE/DELETED flag in IMAP and Sylpheed don't have the same
5070  *   meaning, in IMAP it always removes the messages from the FolderItem
5071  *   in Sylpheed it can mean to move the message to trash
5072  */
5073
5074 typedef struct _get_flags_data {
5075         Folder *folder;
5076         FolderItem *item;
5077         MsgInfoList *msginfo_list;
5078         GHashTable *msgflags;
5079         gboolean full_search;
5080         gboolean done;
5081 } get_flags_data;
5082
5083 static /*gint*/ void *imap_get_flags_thread(void *data)
5084 {
5085         get_flags_data *stuff = (get_flags_data *)data;
5086         Folder *folder = stuff->folder;
5087         FolderItem *fitem = (FolderItem *) stuff->item;
5088         MsgInfoList *msginfo_list = stuff->msginfo_list;
5089         GHashTable *msgflags = stuff->msgflags;
5090         GSList *elem;
5091         carray * lep_uidtab;
5092         IMAPSession *session;
5093         gint ok;
5094         int r = MAILIMAP_NO_ERROR;
5095         GHashTable *flags_hash = NULL;
5096         GHashTable *tags_hash = NULL;
5097         gboolean full_search = stuff->full_search;
5098         GSList *sorted_list = NULL;
5099         GSList *unseen = NULL, *answered = NULL, *flagged = NULL, *deleted = NULL, *forwarded = NULL, *spam = NULL;
5100         GSList *seq_list, *cur;
5101         gboolean reverse_seen = FALSE;
5102         gboolean selected_folder;
5103         gint exists_cnt, unseen_cnt;
5104         gboolean got_alien_tags = FALSE;
5105
5106         session = imap_session_get(folder);
5107
5108         if (session == NULL) {
5109                 stuff->done = TRUE;
5110                 return GINT_TO_POINTER(-1);
5111         }
5112         selected_folder = (session->mbox != NULL) &&
5113                           (!strcmp(session->mbox, fitem->path));
5114
5115         lock_session(session);
5116         if (!selected_folder) {
5117                 ok = imap_select(session, IMAP_FOLDER(folder), fitem,
5118                         &exists_cnt, NULL, &unseen_cnt, NULL, NULL, TRUE);
5119                 if (ok != MAILIMAP_NO_ERROR) {
5120                         stuff->done = TRUE;
5121                         return GINT_TO_POINTER(-1);
5122                 }
5123
5124                 if (unseen_cnt > exists_cnt / 2)
5125                         reverse_seen = TRUE;
5126         }
5127         else {
5128                 if (fitem->unread_msgs > fitem->total_msgs / 2)
5129                         reverse_seen = TRUE;
5130         }
5131
5132         sorted_list = g_slist_sort(g_slist_copy(msginfo_list), compare_msginfo);
5133         if (!full_search) {
5134                 seq_list = imap_get_lep_set_from_msglist(IMAP_FOLDER(folder), msginfo_list);
5135         } else {
5136                 struct mailimap_set * set;
5137                 set = mailimap_set_new_interval(1, 0);
5138                 seq_list = g_slist_append(NULL, set);
5139         }
5140
5141         if (folder->account && folder->account->low_bandwidth) {
5142                 for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
5143                         struct mailimap_set * imapset;
5144                         clist * lep_uidlist;
5145                         int r;
5146
5147                         imapset = cur->data;
5148                         if (reverse_seen) {
5149                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SEEN, NULL,
5150                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5151                         }
5152                         else {
5153                                 r = imap_threaded_search(folder,
5154                                                          IMAP_SEARCH_TYPE_UNSEEN, NULL,
5155                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5156                         }
5157                         if (r == MAILIMAP_NO_ERROR) {
5158                                 GSList * uidlist;
5159
5160                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5161                                 mailimap_search_result_free(lep_uidlist);
5162
5163                                 unseen = g_slist_concat(unseen, uidlist);
5164                         } else {
5165                                 imap_handle_error(SESSION(session), NULL, r);
5166                                 goto bail;
5167                         }
5168
5169                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_FLAGGED, 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                                 flagged = g_slist_concat(flagged, uidlist);
5178                         } else {
5179                                 imap_handle_error(SESSION(session), NULL, r);
5180                                 goto bail;
5181                         }
5182
5183                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
5184                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_ANSWERED, 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                                         answered = g_slist_concat(answered, uidlist);
5193                                 } else {
5194                                         imap_handle_error(SESSION(session), NULL, r);
5195                                         goto bail;
5196                                 }
5197
5198                                 if (flag_ok(IMAP_FOLDER_ITEM(fitem), IMAP_FLAG_FORWARDED)) {
5199                                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_FORWARDED, NULL,
5200                                                                  NULL, full_search ? NULL:imapset, &lep_uidlist);
5201                                         if (r == MAILIMAP_NO_ERROR) {
5202                                                 GSList * uidlist;
5203
5204                                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5205                                                 mailimap_search_result_free(lep_uidlist);
5206
5207                                                 forwarded = g_slist_concat(forwarded, uidlist);
5208                                         } else {
5209                                                 imap_handle_error(SESSION(session), NULL, r);
5210                                                 goto bail;
5211                                         }
5212                                 }
5213
5214                                 if (flag_ok(IMAP_FOLDER_ITEM(fitem), IMAP_FLAG_SPAM)) {
5215                                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SPAM, 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                                                 spam = g_slist_concat(spam, uidlist);
5224                                         } else {
5225                                                 imap_handle_error(SESSION(session), NULL, r);
5226                                                 goto bail;
5227                                         }
5228                                 }
5229
5230                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_DELETED, NULL,
5231                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5232                                 if (r == MAILIMAP_NO_ERROR) {
5233                                         GSList * uidlist;
5234
5235                                         uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5236                                         mailimap_search_result_free(lep_uidlist);
5237
5238                                         deleted = g_slist_concat(deleted, uidlist);
5239                                 } else {
5240                                         imap_handle_error(SESSION(session), NULL, r);
5241                                         goto bail;
5242                                 }
5243                         }
5244                 }
5245
5246         } else {
5247                 r = imap_threaded_fetch_uid_flags(folder, 1, &lep_uidtab);
5248                 if (r == MAILIMAP_NO_ERROR) {
5249                         flags_hash = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, NULL);
5250                         tags_hash = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, NULL);
5251                         imap_flags_hash_from_lep_uid_flags_tab(lep_uidtab, flags_hash, tags_hash);
5252                         imap_fetch_uid_flags_list_free(lep_uidtab);
5253                 } else {
5254                         imap_handle_error(SESSION(session), NULL, r);
5255                         goto bail;
5256                 }
5257         }
5258
5259 bail:
5260         if (r == MAILIMAP_NO_ERROR)
5261                 unlock_session(session);
5262
5263         for (elem = sorted_list; elem != NULL; elem = g_slist_next(elem)) {
5264                 MsgInfo *msginfo;
5265                 MsgPermFlags flags, oldflags;
5266                 gboolean wasnew;
5267
5268                 msginfo = (MsgInfo *) elem->data;
5269                 flags = msginfo->flags.perm_flags;
5270                 wasnew = (flags & MSG_NEW);
5271                 oldflags = flags & ~(MSG_NEW|MSG_UNREAD|MSG_REPLIED|MSG_FORWARDED|MSG_MARKED|MSG_DELETED|MSG_SPAM);
5272
5273                 if (folder->account && folder->account->low_bandwidth) {
5274                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
5275                                 flags &= ~((reverse_seen ? 0 : MSG_UNREAD | MSG_NEW) | MSG_REPLIED | MSG_FORWARDED | MSG_MARKED | MSG_SPAM);
5276                         } else {
5277                                 flags &= ~((reverse_seen ? 0 : MSG_UNREAD | MSG_NEW | MSG_MARKED));
5278                         }
5279                         if (reverse_seen)
5280                                 flags |= MSG_UNREAD | (wasnew ? MSG_NEW : 0);
5281                         if (gslist_find_next_num(&unseen, msginfo->msgnum) == msginfo->msgnum) {
5282                                 if (!reverse_seen) {
5283                                         flags |= MSG_UNREAD | (wasnew ? MSG_NEW : 0);
5284                                 } else {
5285                                         flags &= ~(MSG_UNREAD | MSG_NEW);
5286                                 }
5287                         }
5288
5289                         if (gslist_find_next_num(&flagged, msginfo->msgnum) == msginfo->msgnum)
5290                                 flags |= MSG_MARKED;
5291                         else
5292                                 flags &= ~MSG_MARKED;
5293
5294                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
5295                                 if (gslist_find_next_num(&answered, msginfo->msgnum) == msginfo->msgnum)
5296                                         flags |= MSG_REPLIED;
5297                                 else
5298                                         flags &= ~MSG_REPLIED;
5299                                 if (gslist_find_next_num(&forwarded, msginfo->msgnum) == msginfo->msgnum)
5300                                         flags |= MSG_FORWARDED;
5301                                 else
5302                                         flags &= ~MSG_FORWARDED;
5303                                 if (gslist_find_next_num(&spam, msginfo->msgnum) == msginfo->msgnum)
5304                                         flags |= MSG_SPAM;
5305                                 else
5306                                         flags &= ~MSG_SPAM;
5307                                 if (gslist_find_next_num(&deleted, msginfo->msgnum) == msginfo->msgnum)
5308                                         flags |= MSG_DELETED;
5309                                 else
5310                                         flags &= ~MSG_DELETED;
5311                         }
5312                 } else {
5313                         if (flags_hash != NULL) {
5314
5315                                 flags = GPOINTER_TO_INT(g_hash_table_lookup(flags_hash,
5316                                                 GINT_TO_POINTER(msginfo->msgnum)));
5317                         }
5318
5319                         if ((flags & MSG_UNREAD) == 0)
5320                                 flags &= ~MSG_NEW;
5321                         else if (wasnew)
5322                                 flags |= MSG_NEW;
5323                         flags |= oldflags;
5324
5325                         if (tags_hash != NULL) {
5326                                 GSList *tags = g_hash_table_lookup(tags_hash, GINT_TO_POINTER(msginfo->msgnum));
5327                                 GSList *cur;
5328
5329                                 g_slist_free(msginfo->tags);
5330                                 msginfo->tags = NULL;
5331
5332                                 for (cur = tags; cur; cur = cur->next) {
5333                                         gchar *real_tag = imap_modified_utf7_to_utf8(cur->data, TRUE);
5334                                         gint id = 0;
5335                                         id = tags_get_id_for_str(real_tag);
5336                                         if (id == -1) {
5337                                                 id = tags_add_tag(real_tag);
5338                                                 got_alien_tags = TRUE;
5339                                         }
5340                                         msginfo->tags = g_slist_append(
5341                                                                 msginfo->tags,
5342                                                                 GINT_TO_POINTER(id));
5343                                         g_free(real_tag);
5344                                 }
5345                                 slist_free_strings_full(tags);
5346                         }
5347                 }
5348
5349                 g_hash_table_insert(msgflags, msginfo, GINT_TO_POINTER(flags));
5350         }
5351
5352         if (got_alien_tags) {
5353                 tags_write_tags();
5354                 main_window_reflect_tags_changes(mainwindow_get_mainwindow());
5355         }
5356
5357         if (flags_hash)
5358                 g_hash_table_destroy(flags_hash);
5359         if (tags_hash)
5360                 g_hash_table_destroy(tags_hash);
5361
5362         imap_lep_set_free(seq_list);
5363         g_slist_free(flagged);
5364         g_slist_free(deleted);
5365         g_slist_free(answered);
5366         g_slist_free(forwarded);
5367         g_slist_free(spam);
5368         g_slist_free(unseen);
5369         g_slist_free(sorted_list);
5370
5371         stuff->done = TRUE;
5372         return GINT_TO_POINTER(0);
5373 }
5374
5375 static gint imap_get_flags(Folder *folder, FolderItem *item,
5376                            MsgInfoList *msginfo_list, GHashTable *msgflags)
5377 {
5378         gint result;
5379         get_flags_data *data = g_new0(get_flags_data, 1);
5380         data->done = FALSE;
5381         data->folder = folder;
5382         data->item = item;
5383         data->msginfo_list = msginfo_list;
5384         data->msgflags = msgflags;
5385         data->full_search = FALSE;
5386
5387         GSList *tmp = NULL, *cur;
5388
5389         if (prefs_common.work_offline &&
5390             !inc_offline_should_override(FALSE,
5391                 _("Claws Mail needs network access in order "
5392                   "to access the IMAP server."))) {
5393                 g_free(data);
5394                 return -1;
5395         }
5396
5397         tmp = folder_item_get_msg_list(item);
5398
5399         if (g_slist_length(tmp) <= g_slist_length(msginfo_list))
5400                 data->full_search = TRUE;
5401
5402         for (cur = tmp; cur; cur = cur->next)
5403                 procmsg_msginfo_free((MsgInfo *)cur->data);
5404
5405         g_slist_free(tmp);
5406
5407         result = GPOINTER_TO_INT(imap_get_flags_thread(data));
5408
5409         g_free(data);
5410         return result;
5411
5412 }
5413
5414 static gboolean process_flags(gpointer key, gpointer value, gpointer user_data)
5415 {
5416         gboolean flags_set = GPOINTER_TO_INT(user_data);
5417         gint flags_value = GPOINTER_TO_INT(key);
5418         hashtable_data *data = (hashtable_data *)value;
5419         IMAPFolderItem *_item = data->item;
5420         FolderItem *item = (FolderItem *)_item;
5421         gint ok = MAILIMAP_ERROR_BAD_STATE;
5422         IMAPSession *session = NULL;
5423
5424         debug_print("getting session...\n");
5425         session = imap_session_get(item->folder);
5426
5427         data->msglist = g_slist_reverse(data->msglist);
5428
5429         debug_print("IMAP %ssetting flags to %d for %d messages\n",
5430                 flags_set?"":"un",
5431                 flags_value,
5432                 g_slist_length(data->msglist));
5433
5434         lock_session(session);
5435         if (session) {
5436                 ok = imap_select(session, IMAP_FOLDER(item->folder), item,
5437                          NULL, NULL, NULL, NULL, NULL, FALSE);
5438         }
5439         if (ok == MAILIMAP_NO_ERROR) {
5440                 ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item),
5441                         data->msglist, flags_value, NULL, flags_set);
5442         } else {
5443                 g_warning("can't select mailbox %s", item->path);
5444         }
5445
5446         if (!is_fatal(ok))
5447                 unlock_session(session);
5448
5449         g_slist_free(data->msglist);
5450         g_free(data);
5451         return TRUE;
5452 }
5453
5454 static gboolean process_tags(gpointer key, gpointer value, gpointer user_data)
5455 {
5456         gboolean tags_set = GPOINTER_TO_INT(user_data);
5457         TagsData *data = (TagsData *)value;
5458         IMAPFolderItem *_item = data->item;
5459         FolderItem *item = (FolderItem *)_item;
5460         gchar *str = data->str;
5461         gint ok = MAILIMAP_ERROR_BAD_STATE;
5462         IMAPSession *session = NULL;
5463
5464         debug_print("getting session...\n");
5465         session = imap_session_get(item->folder);
5466
5467         data->msglist = g_slist_reverse(data->msglist);
5468
5469         debug_print("IMAP %ssetting tags %s for %d messages\n",
5470                 tags_set?"":"un",
5471                 str,
5472                 g_slist_length(data->msglist));
5473
5474         lock_session(session);
5475         if (session) {
5476                 ok = imap_select(session, IMAP_FOLDER(item->folder), item,
5477                          NULL, NULL, NULL, NULL, NULL, FALSE);
5478         }
5479         if (ok == MAILIMAP_NO_ERROR) {
5480                 GSList list;
5481                 list.data = str;
5482                 list.next = NULL;
5483                 ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item),
5484                         data->msglist, 0, &list, tags_set);
5485         } else {
5486                 g_warning("can't select mailbox %s", item->path);
5487         }
5488
5489         if (!is_fatal(ok))
5490                 unlock_session(session);
5491
5492         g_slist_free(data->msglist);
5493         g_free(data->str);
5494         g_free(data);
5495         return TRUE;
5496 }
5497
5498 static void process_hashtable(IMAPFolderItem *item)
5499 {
5500         if (item->flags_set_table) {
5501                 g_hash_table_foreach_remove(item->flags_set_table, process_flags, GINT_TO_POINTER(TRUE));
5502                 g_hash_table_destroy(item->flags_set_table);
5503                 item->flags_set_table = NULL;
5504         }
5505         if (item->flags_unset_table) {
5506                 g_hash_table_foreach_remove(item->flags_unset_table, process_flags, GINT_TO_POINTER(FALSE));
5507                 g_hash_table_destroy(item->flags_unset_table);
5508                 item->flags_unset_table = NULL;
5509         }
5510         if (item->tags_set_table) {
5511                 g_hash_table_foreach_remove(item->tags_set_table, process_tags, GINT_TO_POINTER(TRUE));
5512                 g_hash_table_destroy(item->tags_set_table);
5513                 item->tags_set_table = NULL;
5514         }
5515         if (item->tags_unset_table) {
5516                 g_hash_table_foreach_remove(item->tags_unset_table, process_tags, GINT_TO_POINTER(FALSE));
5517                 g_hash_table_destroy(item->tags_unset_table);
5518                 item->tags_unset_table = NULL;
5519         }
5520
5521 }
5522
5523 static void imap_set_batch (Folder *folder, FolderItem *_item, gboolean batch)
5524 {
5525         IMAPFolderItem *item = (IMAPFolderItem *)_item;
5526         IMAPSession *session;
5527
5528         g_return_if_fail(item != NULL);
5529
5530         if (item->batching == batch)
5531                 return;
5532
5533         if (batch) {
5534                 item->batching = TRUE;
5535                 debug_print("IMAP switching to batch mode\n");
5536                 if (!item->flags_set_table) {
5537                         item->flags_set_table = g_hash_table_new(NULL, g_direct_equal);
5538                 }
5539                 if (!item->flags_unset_table) {
5540                         item->flags_unset_table = g_hash_table_new(NULL, g_direct_equal);
5541                 }
5542                 if (!item->tags_set_table) {
5543                         item->tags_set_table = g_hash_table_new(NULL, g_direct_equal);
5544                 }
5545                 if (!item->tags_unset_table) {
5546                         item->tags_unset_table = g_hash_table_new(NULL, g_direct_equal);
5547                 }
5548                 session = imap_session_get(folder);
5549                 if (session) {
5550                         imap_refresh_sensitivity(session);
5551                         session->sens_update_block = TRUE;
5552                 }
5553         } else {
5554                 debug_print("IMAP switching away from batch mode\n");
5555                 /* process stuff */
5556                 process_hashtable(item);
5557                 item->batching = FALSE;
5558                 session = imap_session_get(folder);
5559                 if (session) {
5560                         session->sens_update_block = FALSE;
5561                         imap_refresh_sensitivity(session);
5562                 }
5563         }
5564 }
5565
5566
5567
5568 /* data types conversion libetpan <-> claws */
5569
5570
5571
5572 #define ETPAN_IMAP_MB_MARKED      1
5573 #define ETPAN_IMAP_MB_UNMARKED    2
5574 #define ETPAN_IMAP_MB_NOSELECT    4
5575 #define ETPAN_IMAP_MB_NOINFERIORS 8
5576
5577 static int imap_flags_to_flags(struct mailimap_mbx_list_flags * imap_flags)
5578 {
5579   int flags;
5580   clistiter * cur;
5581
5582   flags = 0;
5583   if (imap_flags->mbf_type == MAILIMAP_MBX_LIST_FLAGS_SFLAG) {
5584     switch (imap_flags->mbf_sflag) {
5585     case MAILIMAP_MBX_LIST_SFLAG_MARKED:
5586       flags |= ETPAN_IMAP_MB_MARKED;
5587       break;
5588     case MAILIMAP_MBX_LIST_SFLAG_NOSELECT:
5589       flags |= ETPAN_IMAP_MB_NOSELECT;
5590       break;
5591     case MAILIMAP_MBX_LIST_SFLAG_UNMARKED:
5592       flags |= ETPAN_IMAP_MB_UNMARKED;
5593       break;
5594     }
5595   }
5596
5597   if (imap_flags->mbf_oflags) {
5598     for(cur = clist_begin(imap_flags->mbf_oflags) ; cur != NULL ;
5599         cur = clist_next(cur)) {
5600       struct mailimap_mbx_list_oflag * oflag;
5601
5602       oflag = clist_content(cur);
5603
5604       switch (oflag->of_type) {
5605       case MAILIMAP_MBX_LIST_OFLAG_NOINFERIORS:
5606         flags |= ETPAN_IMAP_MB_NOINFERIORS;
5607         break;
5608       }
5609     }
5610   }
5611   return flags;
5612 }
5613
5614 static GSList * imap_list_from_lep(IMAPFolder * folder,
5615                                    clist * list, const gchar * real_path, gboolean all)
5616 {
5617         clistiter * iter;
5618         GSList * item_list = NULL, *llast = NULL;
5619
5620         if (list) {
5621                 for(iter = clist_begin(list) ; iter != NULL ;
5622                     iter = clist_next(iter)) {
5623                         struct mailimap_mailbox_list * mb;
5624                         int flags;
5625                         char delimiter;
5626                         char * name;
5627                         char * dup_name;
5628                         gchar * base;
5629                         gchar * loc_name;
5630                         gchar * loc_path;
5631                         FolderItem *new_item;
5632
5633                         mb = clist_content(iter);
5634
5635                         if (mb == NULL)
5636                                 continue;
5637
5638                         flags = 0;
5639                         if (mb->mb_flag != NULL)
5640                                 flags = imap_flags_to_flags(mb->mb_flag);
5641
5642                         delimiter = mb->mb_delimiter;
5643                         name = mb->mb_name;
5644
5645                         dup_name = strdup(name);
5646                         if (delimiter != '\0')
5647                                 subst_char(dup_name, delimiter, '/');
5648
5649                         base = g_path_get_basename(dup_name);
5650                         if (base[0] == '.') {
5651                                 g_free(base);
5652                                 free(dup_name);
5653                                 continue;
5654                         }
5655                         if (!all && path_cmp(name, real_path) == 0) {
5656                                 g_free(base);
5657                                 free(dup_name);
5658                                 continue;
5659                         }
5660
5661                         if (!all && dup_name[strlen(dup_name)-1] == '/') {
5662                                 g_free(base);
5663                                 free(dup_name);
5664                                 continue;
5665                         }
5666
5667                         loc_name = imap_modified_utf7_to_utf8(base, FALSE);
5668                         loc_path = imap_modified_utf7_to_utf8(dup_name, FALSE);
5669
5670                         new_item = folder_item_new(FOLDER(folder), loc_name, loc_path);
5671                         if ((flags & ETPAN_IMAP_MB_NOINFERIORS) != 0)
5672                                 new_item->no_sub = TRUE;
5673                         if (strcasecmp(dup_name, "INBOX") != 0 &&
5674                             ((flags & ETPAN_IMAP_MB_NOSELECT) != 0))
5675                                 new_item->no_select = TRUE;
5676
5677                         if (item_list == NULL)
5678                                 llast = item_list = g_slist_append(item_list, new_item);
5679                         else {
5680                                 llast = g_slist_append(llast, new_item);
5681                                 llast = llast->next;
5682                         }
5683                         debug_print("folder '%s' found.\n", loc_path);
5684                         g_free(base);
5685                         g_free(loc_path);
5686                         g_free(loc_name);
5687
5688                         free(dup_name);
5689                 }
5690         }
5691         return item_list;
5692 }
5693
5694 static GSList * imap_get_lep_set_from_numlist(IMAPFolder *folder, MsgNumberList *numlist)
5695 {
5696         GSList *sorted_list, *cur;
5697         guint first, last, next;
5698         GSList *ret_list = NULL, *llast = NULL;
5699         struct mailimap_set * current_set;
5700         unsigned int item_count;
5701
5702         if (numlist == NULL)
5703                 return NULL;
5704
5705         current_set = mailimap_set_new_empty();
5706
5707         sorted_list = g_slist_copy(numlist);
5708         sorted_list = g_slist_sort(sorted_list, g_int_compare);
5709
5710         first = GPOINTER_TO_INT(sorted_list->data);
5711
5712         item_count = 0;
5713         for (cur = sorted_list; cur != NULL; cur = g_slist_next(cur)) {
5714                 if (GPOINTER_TO_INT(cur->data) == 0)
5715                         continue;
5716
5717                 item_count ++;
5718
5719                 last = GPOINTER_TO_INT(cur->data);
5720                 if (cur->next)
5721                         next = GPOINTER_TO_INT(cur->next->data);
5722                 else
5723                         next = 0;
5724
5725                 if (last + 1 != next || next == 0 || item_count >= folder->max_set_size) {
5726
5727                         struct mailimap_set_item * item;
5728                         item = mailimap_set_item_new(first, last);
5729                         mailimap_set_add(current_set, item);
5730
5731                         first = next;
5732
5733                         if (item_count >= folder->max_set_size) {
5734                                 if (ret_list == NULL)
5735                                         llast = ret_list = g_slist_append(ret_list,
5736                                                           current_set);
5737                                 else {
5738                                         llast = g_slist_append(llast, current_set);
5739                                         llast = llast->next;
5740                                 }
5741
5742                                 current_set = mailimap_set_new_empty();
5743                                 item_count = 0;
5744                         }
5745                 }
5746         }
5747
5748         if (clist_count(current_set->set_list) > 0) {
5749                 ret_list = g_slist_append(ret_list,
5750                                           current_set);
5751         }
5752
5753         g_slist_free(sorted_list);
5754
5755         return ret_list;
5756 }
5757
5758 static GSList * imap_get_lep_set_from_msglist(IMAPFolder *folder, MsgInfoList *msglist)
5759 {
5760         MsgNumberList *numlist = NULL;
5761         GSList *seq_list;
5762
5763         numlist = procmsg_get_number_list_for_msgs(msglist);
5764
5765         seq_list = imap_get_lep_set_from_numlist(folder, numlist);
5766         g_slist_free(numlist);
5767
5768         return seq_list;
5769 }
5770
5771 static GSList * imap_uid_list_from_lep(clist * list, gint* length)
5772 {
5773         clistiter * iter;
5774         GSList * result;
5775         gint len = 0;
5776
5777         result = NULL;
5778
5779         if (list) {
5780                 for(iter = clist_begin(list) ; iter != NULL ;
5781                     iter = clist_next(iter)) {
5782                         uint32_t * puid;
5783
5784                         puid = clist_content(iter);
5785                         result = g_slist_prepend(result, GINT_TO_POINTER(* puid));
5786                         len++;
5787                 }
5788                 result = g_slist_reverse(result);
5789         }
5790         if (length)
5791                 *length = len;
5792         return result;
5793 }
5794
5795 static GSList * imap_uid_list_from_lep_tab(carray * list)
5796 {
5797         unsigned int i;
5798         GSList * result;
5799
5800         result = NULL;
5801
5802         for(i = 0 ; i < carray_count(list) ; i ++) {
5803                 uint32_t * puid;
5804
5805                 puid = carray_get(list, i);
5806                 result = g_slist_prepend(result, GINT_TO_POINTER(* puid));
5807         }
5808         result = g_slist_reverse(result);
5809         return result;
5810 }
5811
5812 static void imap_flags_hash_from_lep_uid_flags_tab(carray * list,
5813                                                    GHashTable * hash,
5814                                                    GHashTable * tags_hash)
5815 {
5816         unsigned int i;
5817
5818         for(i = 0 ; i < carray_count(list) ; i += 3) {
5819                 uint32_t * puid;
5820                 int * pflags;
5821                 GSList *tags;
5822
5823                 puid = carray_get(list, i);
5824                 pflags = carray_get(list, i + 1);
5825                 tags = carray_get(list, i + 2);
5826
5827                 g_hash_table_insert(hash, GINT_TO_POINTER(*puid), GINT_TO_POINTER(* pflags));
5828                 g_hash_table_insert(tags_hash, GINT_TO_POINTER(*puid), tags);
5829         }
5830 }
5831
5832 static MsgInfo *imap_envelope_from_lep(struct imap_fetch_env_info * info,
5833                                        FolderItem *item)
5834 {
5835         MsgInfo *msginfo = NULL;
5836         guint32 uid = 0;
5837         goffset size = 0;
5838         MsgFlags flags = {0, 0};
5839
5840         if (info->headers == NULL)
5841                 return NULL;
5842
5843         MSG_SET_TMP_FLAGS(flags, MSG_IMAP);
5844         if (folder_has_parent_of_type(item, F_QUEUE)) {
5845                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
5846         } else if (folder_has_parent_of_type(item, F_DRAFT)) {
5847                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
5848         }
5849         flags.perm_flags = info->flags;
5850
5851         uid = info->uid;
5852         size = (goffset) info->size;
5853         msginfo = procheader_parse_str(info->headers, flags, FALSE, FALSE);
5854
5855         if (msginfo) {
5856                 msginfo->msgnum = uid;
5857                 msginfo->size = size;
5858         }
5859
5860         return msginfo;
5861 }
5862
5863 static void imap_lep_set_free(GSList *seq_list)
5864 {
5865         GSList * cur;
5866
5867         for(cur = seq_list ; cur != NULL ; cur = g_slist_next(cur)) {
5868                 struct mailimap_set * imapset;
5869
5870                 imapset = cur->data;
5871                 mailimap_set_free(imapset);
5872         }
5873         g_slist_free(seq_list);
5874 }
5875
5876 static struct mailimap_flag_list * imap_flag_to_lep(IMAPFolderItem *item, IMAPFlags flags, GSList *tags)
5877 {
5878         struct mailimap_flag_list * flag_list;
5879         GSList *cur = tags;
5880
5881         flag_list = mailimap_flag_list_new_empty();
5882
5883         if (IMAP_IS_SEEN(flags))
5884                 mailimap_flag_list_add(flag_list,
5885                                        mailimap_flag_new_seen());
5886         if (IMAP_IS_ANSWERED(flags))
5887                 mailimap_flag_list_add(flag_list,
5888                                        mailimap_flag_new_answered());
5889         if (IMAP_IS_FLAGGED(flags))
5890                 mailimap_flag_list_add(flag_list,
5891                                        mailimap_flag_new_flagged());
5892         if (IMAP_IS_DELETED(flags))
5893                 mailimap_flag_list_add(flag_list,
5894                                        mailimap_flag_new_deleted());
5895         if (IMAP_IS_DRAFT(flags))
5896                 mailimap_flag_list_add(flag_list,
5897                                        mailimap_flag_new_draft());
5898         if (IMAP_IS_FORWARDED(flags) && flag_ok(item, IMAP_FLAG_FORWARDED))
5899                 mailimap_flag_list_add(flag_list,
5900                                        mailimap_flag_new_flag_keyword(strdup(RTAG_FORWARDED)));
5901         if (IMAP_IS_SPAM(flags) && flag_ok(item, IMAP_FLAG_SPAM))
5902                 mailimap_flag_list_add(flag_list,
5903                                        mailimap_flag_new_flag_keyword(strdup(RTAG_JUNK)));
5904         else if (IMAP_IS_HAM(flags) && flag_ok(item, IMAP_FLAG_HAM))
5905                 mailimap_flag_list_add(flag_list,
5906                                        mailimap_flag_new_flag_keyword(strdup(RTAG_NON_JUNK)));
5907
5908         for (; cur; cur = cur->next) {
5909                 gchar *enc_str =
5910                         imap_utf8_to_modified_utf7(cur->data, TRUE);
5911                 g_strstrip(enc_str);
5912
5913                 mailimap_flag_list_add(flag_list,
5914                         mailimap_flag_new_flag_keyword(enc_str));
5915         }
5916
5917         return flag_list;
5918 }
5919
5920 guint imap_folder_get_refcnt(Folder *folder)
5921 {
5922         return ((IMAPFolder *)folder)->refcnt;
5923 }
5924
5925 void imap_folder_ref(Folder *folder)
5926 {
5927         ((IMAPFolder *)folder)->refcnt++;
5928 }
5929
5930 void imap_disconnect_all(gboolean have_connectivity)
5931 {
5932         GList *list;
5933         gboolean short_timeout;
5934 #ifdef HAVE_NETWORKMANAGER_SUPPORT
5935         GError *error = NULL;
5936
5937         short_timeout = !networkmanager_is_online(&error);
5938         if(error) {
5939                 short_timeout = TRUE;
5940                 g_error_free(error);
5941         }
5942 #else
5943         short_timeout = TRUE;
5944 #endif
5945
5946         if(short_timeout)
5947                 imap_main_set_timeout(1);
5948
5949         for (list = account_get_list(); list != NULL; list = list->next) {
5950                 PrefsAccount *account = list->data;
5951                 if (account->protocol == A_IMAP4) {
5952                         RemoteFolder *folder = (RemoteFolder *)account->folder;
5953                         if (folder && folder->session) {
5954                                 if (imap_is_busy(FOLDER(folder)))
5955                                         imap_threaded_cancel(FOLDER(folder));
5956
5957                                 IMAPSession *session = (IMAPSession *)folder->session;
5958                                 if (have_connectivity)
5959                                         imap_threaded_disconnect(FOLDER(folder));
5960                                 SESSION(session)->state = SESSION_DISCONNECTED;
5961                                 SESSION(session)->sock = NULL;
5962                                 imap_safe_destroy(session);
5963                                 folder->session = NULL;
5964                         }
5965                 }
5966         }
5967
5968         if(short_timeout)
5969                 imap_main_set_timeout(prefs_common.io_timeout_secs);
5970 }
5971
5972 void imap_folder_unref(Folder *folder)
5973 {
5974         if (((IMAPFolder *)folder)->refcnt > 0)
5975                 ((IMAPFolder *)folder)->refcnt--;
5976 }
5977
5978 void imap_cancel_all(void)
5979 {
5980         GList *folderlist;
5981         GList *cur;
5982
5983         folderlist = folder_get_list();
5984         for (cur = folderlist; cur != NULL; cur = g_list_next(cur)) {
5985                 Folder *folder = (Folder *) cur->data;
5986
5987                 if (folder->klass == &imap_class) {
5988                         if (imap_is_busy(folder)) {
5989                                 IMAPSession *imap_session;
5990                                 RemoteFolder *rfolder;
5991
5992                                 g_printerr("cancelled\n");
5993                                 imap_threaded_cancel(folder);
5994                                 rfolder = (RemoteFolder *) folder;
5995                                 imap_session = (IMAPSession *) rfolder->session;
5996                                 if (imap_session)
5997                                         imap_session->cancelled = 1;
5998                         }
5999                 }
6000         }
6001 }
6002
6003 gboolean imap_cancel_all_enabled(void)
6004 {
6005         GList *folderlist;
6006         GList *cur;
6007
6008         folderlist = folder_get_list();
6009         for (cur = folderlist; cur != NULL; cur = g_list_next(cur)) {
6010                 Folder *folder = (Folder *) cur->data;
6011
6012                 if (folder->klass == &imap_class) {
6013                         if (imap_is_busy(folder)) {
6014                                 return TRUE;
6015                         }
6016                 }
6017         }
6018
6019         return FALSE;
6020 }
6021
6022 static gboolean imap_is_busy(Folder *folder)
6023 {
6024         IMAPSession *imap_session;
6025         RemoteFolder *rfolder;
6026
6027         rfolder = (RemoteFolder *) folder;
6028         imap_session = (IMAPSession *) rfolder->session;
6029         if (imap_session == NULL)
6030                 return FALSE;
6031
6032         return imap_session->busy;
6033 }
6034
6035 #else /* HAVE_LIBETPAN */
6036
6037 static FolderClass imap_class;
6038
6039 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item);
6040 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag);
6041
6042 static Folder   *imap_folder_new        (const gchar    *name,
6043                                          const gchar    *path)
6044 {
6045         static gboolean missing_imap_warning = TRUE;
6046         if (missing_imap_warning) {
6047                 missing_imap_warning = FALSE;
6048                 alertpanel_error(
6049                         _("You have one or more IMAP accounts "
6050                           "defined. However this version of "
6051                           "Claws Mail has been built without "
6052                           "IMAP support; your IMAP account(s) are "
6053                           "disabled.\n\n"
6054                           "You probably need to "
6055                           "install libetpan and recompile "
6056                           "Claws Mail."));
6057         }
6058         return NULL;
6059 }
6060 static gint     imap_create_tree        (Folder         *folder)
6061 {
6062         return -1;
6063 }
6064 static FolderItem *imap_create_folder   (Folder         *folder,
6065                                          FolderItem     *parent,
6066                                          const gchar    *name)
6067 {
6068         return NULL;
6069 }
6070 static gint     imap_rename_folder      (Folder         *folder,
6071                                          FolderItem     *item,
6072                                          const gchar    *name)
6073 {
6074         return -1;
6075 }
6076
6077 gchar imap_get_path_separator_for_item(FolderItem *item)
6078 {
6079         return '/';
6080 }
6081
6082 FolderClass *imap_get_class(void)
6083 {
6084         if (imap_class.idstr == NULL) {
6085                 imap_class.type = F_IMAP;
6086                 imap_class.idstr = "imap";
6087                 imap_class.uistr = "IMAP4";
6088
6089                 imap_class.new_folder = imap_folder_new;
6090                 imap_class.create_tree = imap_create_tree;
6091                 imap_class.create_folder = imap_create_folder;
6092                 imap_class.rename_folder = imap_rename_folder;
6093
6094                 imap_class.set_xml = folder_set_xml;
6095                 imap_class.get_xml = folder_get_xml;
6096                 imap_class.item_set_xml = imap_item_set_xml;
6097                 imap_class.item_get_xml = imap_item_get_xml;
6098                 /* nothing implemented */
6099         }
6100
6101         return &imap_class;
6102 }
6103
6104 void imap_disconnect_all(gboolean have_connectivity)
6105 {
6106 }
6107
6108 gint imap_subscribe(Folder *folder, FolderItem *item, gchar *rpath, gboolean sub)
6109 {
6110         return -1;
6111 }
6112
6113 GList * imap_scan_subtree(Folder *folder, FolderItem *item, gboolean unsubs_only, gboolean recursive)
6114 {
6115         return NULL;
6116 }
6117
6118 void imap_cache_msg(FolderItem *item, gint msgnum)
6119 {
6120 }
6121
6122 void imap_cancel_all(void)
6123 {
6124 }
6125
6126 gboolean imap_cancel_all_enabled(void)
6127 {
6128         return FALSE;
6129 }
6130
6131 #endif
6132
6133 #ifdef HAVE_LIBETPAN
6134 static void imap_synchronise(FolderItem *item, gint days)
6135 {
6136         if (IMAP_FOLDER_ITEM(item)->last_sync == IMAP_FOLDER_ITEM(item)->last_change) {
6137                 debug_print("%s already synced\n", item->path?item->path:item->name);
6138                 return;
6139         }
6140         debug_print("syncing %s\n", item->path?item->path:item->name);
6141         imap_gtk_synchronise(item, days);
6142         IMAP_FOLDER_ITEM(item)->last_sync = IMAP_FOLDER_ITEM(item)->last_change;
6143 }
6144 #endif
6145
6146 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag)
6147 {
6148 #ifdef HAVE_LIBETPAN
6149         GList *cur;
6150 #endif
6151         folder_item_set_xml(folder, item, tag);
6152
6153 #ifdef HAVE_LIBETPAN
6154         for (cur = tag->attr; cur != NULL; cur = g_list_next(cur)) {
6155                 XMLAttr *attr = (XMLAttr *) cur->data;
6156
6157                 if (!attr || !attr->name || !attr->value) continue;
6158                 if (!strcmp(attr->name, "uidnext"))
6159                         IMAP_FOLDER_ITEM(item)->uid_next = atoi(attr->value);
6160                 if (!strcmp(attr->name, "last_sync"))
6161                         IMAP_FOLDER_ITEM(item)->last_sync = atoi(attr->value);
6162                 if (!strcmp(attr->name, "last_change"))
6163                         IMAP_FOLDER_ITEM(item)->last_change = atoi(attr->value);
6164         }
6165         if (IMAP_FOLDER_ITEM(item)->last_change == 0)
6166                 IMAP_FOLDER_ITEM(item)->last_change = time(NULL);
6167 #endif
6168 }
6169
6170 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item)
6171 {
6172         XMLTag *tag;
6173
6174         tag = folder_item_get_xml(folder, item);
6175
6176 #ifdef HAVE_LIBETPAN
6177         xml_tag_add_attr(tag, xml_attr_new_int("uidnext",
6178                         IMAP_FOLDER_ITEM(item)->uid_next));
6179         xml_tag_add_attr(tag, xml_attr_new_int("last_sync",
6180                         IMAP_FOLDER_ITEM(item)->last_sync));
6181         xml_tag_add_attr(tag, xml_attr_new_int("last_change",
6182                         IMAP_FOLDER_ITEM(item)->last_change));
6183
6184 #endif
6185         return tag;
6186 }
6187
6188 /* ===================================================================
6189  * UTF-7 conversion routines as in RFC 2192
6190  * ===================================================================
6191  * These two functions from:
6192  * libimap library.
6193  * Copyright (C) 2003-2004 Pawel Salek. */
6194
6195 /* UTF7 modified base64 alphabet */
6196 static char base64chars[] =
6197   "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+,";
6198 #define UNDEFINED 64
6199
6200 /* UTF16 definitions */
6201 #define UTF16MASK       0x03FFUL
6202 #define UTF16SHIFT      10
6203 #define UTF16BASE       0x10000UL
6204 #define UTF16HIGHSTART  0xD800UL
6205 #define UTF16HIGHEND    0xDBFFUL
6206 #define UTF16LOSTART    0xDC00UL
6207 #define UTF16LOEND      0xDFFFUL
6208
6209
6210 /* Convert an IMAP mailbox to a UTF-8 string.
6211  *  dst needs to have roughly 4 times the storage space of src
6212  *    Hex encoding can triple the size of the input
6213  *    UTF-7 can be slightly denser than UTF-8
6214  *     (worst case: 8 octets UTF-7 becomes 9 octets UTF-8)
6215  */
6216 char* imap_modified_utf7_to_utf8(const char *mbox, gboolean change_spaces)
6217 {
6218   unsigned c, i, bitcount;
6219   unsigned long ucs4, utf16, bitbuf;
6220   unsigned char base64[256];
6221   const char *src;
6222   char *dst, *res  = g_malloc(2*strlen(mbox)+1);
6223
6224   dst = res;
6225   src = mbox;
6226   if(!dst) return NULL;
6227   /* initialize modified base64 decoding table */
6228   memset(base64, UNDEFINED, sizeof (base64));
6229   for (i = 0; i < sizeof (base64chars); ++i) {
6230     base64[(unsigned)base64chars[i]] = i;
6231   }
6232
6233   /* loop until end of string */
6234   while (*src != '\0') {
6235     c = *src++;
6236     /* deal with literal characters and &- */
6237     if (c != '&' || *src == '-') {
6238       /* encode literally */
6239       if (change_spaces && c == '_')
6240         *dst++ = ' ';
6241       else
6242         *dst++ = c;
6243       /* skip over the '-' if this is an &- sequence */
6244       if (c == '&') ++src;
6245     } else {
6246       /* convert modified UTF-7 -> UTF-16 -> UCS-4 -> UTF-8 -> HEX */
6247       bitbuf = 0;
6248       bitcount = 0;
6249       ucs4 = 0;
6250       while ((c = base64[(unsigned char) *src]) != UNDEFINED) {
6251         ++src;
6252         bitbuf = (bitbuf << 6) | c;
6253         bitcount += 6;
6254         /* enough bits for a UTF-16 character? */
6255         if (bitcount >= 16) {
6256           bitcount -= 16;
6257           utf16 = (bitcount ? bitbuf >> bitcount
6258                    : bitbuf) & 0xffff;
6259           /* convert UTF16 to UCS4 */
6260           if
6261             (utf16 >= UTF16HIGHSTART && utf16 <= UTF16HIGHEND) {
6262             ucs4 = (utf16 - UTF16HIGHSTART) << UTF16SHIFT;
6263             continue;
6264           } else if
6265             (utf16 >= UTF16LOSTART && utf16 <= UTF16LOEND) {
6266             ucs4 += utf16 - UTF16LOSTART + UTF16BASE;
6267           } else {
6268             ucs4 = utf16;
6269           }
6270
6271           /* convert UTF-16 range of UCS4 to UTF-8 */
6272           if (ucs4 <= 0x7fUL) {
6273             dst[0] = ucs4;
6274             dst += 1;
6275           } else if (ucs4 <= 0x7ffUL) {
6276             dst[0] = 0xc0 | (ucs4 >> 6);
6277             dst[1] = 0x80 | (ucs4 & 0x3f);
6278             dst += 2;
6279           } else if (ucs4 <= 0xffffUL) {
6280             dst[0] = 0xe0 | (ucs4 >> 12);
6281             dst[1] = 0x80 | ((ucs4 >> 6) & 0x3f);
6282             dst[2] = 0x80 | (ucs4 & 0x3f);
6283             dst += 3;
6284           } else {
6285             dst[0] = 0xf0 | (ucs4 >> 18);
6286             dst[1] = 0x80 | ((ucs4 >> 12) & 0x3f);
6287             dst[2] = 0x80 | ((ucs4 >> 6) & 0x3f);
6288             dst[3] = 0x80 | (ucs4 & 0x3f);
6289             dst += 4;
6290           }
6291         }
6292       }
6293       /* skip over trailing '-' in modified UTF-7 encoding */
6294       if (*src == '-') ++src;
6295     }
6296   }
6297   /* terminate destination string */
6298   *dst = '\0';
6299   return res;
6300 }
6301
6302 /* Convert hex coded UTF-8 string to modified UTF-7 IMAP mailbox
6303  *  dst should be about twice the length of src to deal with non-hex
6304  *  coded URLs
6305  */
6306 char* imap_utf8_to_modified_utf7(const char *src, gboolean change_spaces)
6307 {
6308   unsigned int utf8pos, utf8total, c, utf7mode, bitstogo, utf16flag;
6309   unsigned long ucs4 = 0, bitbuf = 0;
6310
6311   /* initialize hex lookup table */
6312   char *dst, *res;
6313
6314   if (!src) return NULL;
6315
6316   res = malloc(2*strlen(src)+1);
6317   dst = res;
6318   if(!dst) return NULL;
6319
6320   utf7mode = 0;
6321   utf8total = 0;
6322   bitstogo = 0;
6323   utf8pos = 0;
6324   while ((c = (unsigned char)*src) != '\0') {
6325     ++src;
6326     /* normal character? */
6327     if (c >= ' ' && c <= '~' && (c != '_' || !change_spaces)) {
6328       /* switch out of UTF-7 mode */
6329       if (utf7mode) {
6330         if (bitstogo) {
6331           *dst++ = base64chars[(bitbuf << (6 - bitstogo)) & 0x3F];
6332         }
6333         *dst++ = '-';
6334         utf7mode = 0;
6335         utf8pos  = 0;
6336         bitstogo = 0;
6337         utf8total= 0;
6338       }
6339       if (change_spaces && c == ' ')
6340         *dst++ = '_';
6341       else
6342         *dst++ = c;
6343       /* encode '&' as '&-' */
6344       if (c == '&') {
6345         *dst++ = '-';
6346       }
6347       continue;
6348     }
6349     /* switch to UTF-7 mode */
6350     if (!utf7mode) {
6351       *dst++ = '&';
6352       utf7mode = 1;
6353     }
6354     /* Encode US-ASCII characters as themselves */
6355     if (c < 0x80) {
6356       ucs4 = c;
6357     } else if (utf8total) {
6358       /* save UTF8 bits into UCS4 */
6359       ucs4 = (ucs4 << 6) | (c & 0x3FUL);
6360       if (++utf8pos < utf8total) {
6361         continue;
6362       }
6363     } else {
6364       utf8pos = 1;
6365       if (c < 0xE0) {
6366         utf8total = 2;
6367         ucs4 = c & 0x1F;
6368       } else if (c < 0xF0) {
6369         utf8total = 3;
6370         ucs4 = c & 0x0F;
6371       } else {
6372         /* NOTE: can't convert UTF8 sequences longer than 4 */
6373         utf8total = 4;
6374         ucs4 = c & 0x03;
6375       }
6376       continue;
6377     }
6378     /* loop to split ucs4 into two utf16 chars if necessary */
6379     utf8total = 0;
6380     do {
6381       if (ucs4 >= UTF16BASE) {
6382         ucs4 -= UTF16BASE;
6383         bitbuf = (bitbuf << 16) | ((ucs4 >> UTF16SHIFT)
6384                                    + UTF16HIGHSTART);
6385         ucs4 = (ucs4 & UTF16MASK) + UTF16LOSTART;
6386         utf16flag = 1;
6387       } else {
6388         bitbuf = (bitbuf << 16) | ucs4;
6389         utf16flag = 0;
6390       }
6391       bitstogo += 16;
6392       /* spew out base64 */
6393       while (bitstogo >= 6) {
6394         bitstogo -= 6;
6395         *dst++ = base64chars[(bitstogo ? (bitbuf >> bitstogo)
6396                               : bitbuf)
6397                              & 0x3F];
6398       }
6399     } while (utf16flag);
6400   }
6401   /* if in UTF-7 mode, finish in ASCII */
6402   if (utf7mode) {
6403     if (bitstogo) {
6404       *dst++ = base64chars[(bitbuf << (6 - bitstogo)) & 0x3F];
6405     }
6406     *dst++ = '-';
6407   }
6408   /* tie off string */
6409   *dst = '\0';
6410   return res;
6411 }