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_MESSAGEID:
2075         case MATCHCRITERIA_INREPLYTO:
2076         case MATCHCRITERIA_AGE_GREATER:
2077         case MATCHCRITERIA_AGE_LOWER:
2078         case MATCHCRITERIA_FORWARDED:
2079         case MATCHCRITERIA_SPAM:
2080         case MATCHCRITERIA_UNREAD:
2081         case MATCHCRITERIA_NEW:
2082         case MATCHCRITERIA_MARKED:
2083         case MATCHCRITERIA_REPLIED:
2084         case MATCHCRITERIA_DELETED:
2085         case MATCHCRITERIA_SIZE_GREATER:
2086         case MATCHCRITERIA_SIZE_SMALLER:
2087         case MATCHCRITERIA_SIZE_EQUAL:
2088                 return TRUE;
2089         }
2090         return FALSE;
2091 }
2092
2093 static IMAPSearchKey* search_make_key(MatcherProp* match, gboolean* is_all)
2094 {
2095         if (match->matchtype == MATCHTYPE_MATCHCASE || match->matchtype == MATCHTYPE_MATCH) {
2096                 IMAPSearchKey* result = NULL;
2097                 gboolean invert = FALSE;
2098                 gint matchertype = match->criteria;
2099
2100                 if (is_all) {
2101                         *is_all = FALSE;
2102                 }
2103
2104                 switch (matchertype) {
2105                 case MATCHCRITERIA_NOT_NEW: invert = TRUE; matchertype = MATCHCRITERIA_NEW; break;
2106                 case MATCHCRITERIA_NOT_MARKED: invert = TRUE; matchertype = MATCHCRITERIA_MARKED; break;
2107                 case MATCHCRITERIA_NOT_FORWARDED: invert = TRUE; matchertype = MATCHCRITERIA_FORWARDED; break;
2108                 case MATCHCRITERIA_NOT_SPAM: invert = TRUE; matchertype = MATCHCRITERIA_SPAM; break;
2109                 case MATCHCRITERIA_NOT_SUBJECT: invert = TRUE; matchertype = MATCHCRITERIA_SUBJECT; break;
2110                 case MATCHCRITERIA_NOT_FROM: invert = TRUE; matchertype = MATCHCRITERIA_FROM; break;
2111                 case MATCHCRITERIA_NOT_TO: invert = TRUE; matchertype = MATCHCRITERIA_TO; break;
2112                 case MATCHCRITERIA_NOT_CC: invert = TRUE; matchertype = MATCHCRITERIA_CC; break;
2113                 case MATCHCRITERIA_NOT_REFERENCES: invert = TRUE; matchertype = MATCHCRITERIA_REFERENCES; break;
2114                 case MATCHCRITERIA_NOT_HEADER: invert = TRUE; matchertype = MATCHCRITERIA_HEADER; break;
2115                 case MATCHCRITERIA_NOT_TAG: invert = TRUE; matchertype = MATCHCRITERIA_TAG; break;
2116                 case MATCHCRITERIA_NOT_HEADERS_PART: invert = TRUE; matchertype = MATCHCRITERIA_HEADERS_PART; break;
2117                 case MATCHCRITERIA_NOT_HEADERS_CONT: invert = TRUE; matchertype = MATCHCRITERIA_HEADERS_CONT; break;
2118                 case MATCHCRITERIA_NOT_MESSAGE: invert = TRUE; matchertype = MATCHCRITERIA_MESSAGE; break;
2119                 case MATCHCRITERIA_NOT_BODY_PART: invert = TRUE; matchertype = MATCHCRITERIA_BODY_PART; break;
2120                 case MATCHCRITERIA_NOT_TO_AND_NOT_CC: invert = TRUE; matchertype = MATCHCRITERIA_TO_OR_CC; break;
2121                 case MATCHCRITERIA_NOT_MESSAGEID: invert = TRUE; matchertype = MATCHCRITERIA_MESSAGEID; break;
2122                 case MATCHCRITERIA_NOT_INREPLYTO: invert = TRUE; matchertype = MATCHCRITERIA_INREPLYTO; break;
2123                 }
2124
2125                 /*
2126                  * this aborts conversion even for predicates understood by the following code.
2127                  * while that might seem wasteful, claws local search for information listed below
2128                  * has proven faster than IMAP search plus network roundtrips. once this changes,
2129                  * consider removing these exceptions.
2130                  */
2131                 if (imap_matcher_type_is_local(matchertype))
2132                         return NULL;
2133
2134                 /* the Message-ID header is also cached */
2135                 if (matchertype == MATCHCRITERIA_HEADER && g_strcmp0("Message-ID", match->header) == 0) {
2136                         return NULL;
2137                 }
2138
2139                 switch (matchertype) {
2140                 case MATCHCRITERIA_FORWARDED:
2141                         result = imap_search_new(IMAP_SEARCH_CRITERIA_TAG, NULL, RTAG_FORWARDED, 0);
2142                         break;
2143
2144                 case MATCHCRITERIA_SPAM:
2145                         result = imap_search_new(IMAP_SEARCH_CRITERIA_TAG, NULL, RTAG_JUNK, 0);
2146                         break;
2147
2148                 case MATCHCRITERIA_MESSAGEID:
2149                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, "Message-ID", match->expr, 0);
2150                         break;
2151
2152                 case MATCHCRITERIA_INREPLYTO:
2153                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, "In-Reply-To", match->expr, 0);
2154                         break;
2155
2156                 case MATCHCRITERIA_REFERENCES:
2157                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, "References", match->expr, 0);
2158                         break;
2159
2160                 case MATCHCRITERIA_TO_OR_CC:
2161                         result = imap_search_or(
2162                                         imap_search_new(IMAP_SEARCH_CRITERIA_TO, NULL, match->expr, 0),
2163                                         imap_search_new(IMAP_SEARCH_CRITERIA_CC, NULL, match->expr, 0)
2164                                         );
2165                         break;
2166
2167                 case MATCHCRITERIA_HEADERS_PART:
2168                 case MATCHCRITERIA_HEADERS_CONT:
2169                         result = imap_search_and(
2170                                         imap_search_not(imap_search_new(IMAP_SEARCH_CRITERIA_BODY, NULL, match->expr, 0)),
2171                                         imap_search_new(IMAP_SEARCH_CRITERIA_MESSAGE, NULL, match->expr, 0)
2172                                         );
2173                         break;
2174
2175                 case MATCHCRITERIA_SIZE_EQUAL:
2176                         result = imap_search_and(
2177                                         imap_search_not(imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_SMALLER, NULL, NULL, match->value)),
2178                                         imap_search_not(imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_GREATER, NULL, NULL, match->value))
2179                                         );
2180                         break;
2181
2182                 case MATCHCRITERIA_NOT_UNREAD:
2183                         result = imap_search_new(IMAP_SEARCH_CRITERIA_READ, NULL, NULL, 0);
2184                         break;
2185
2186                 case MATCHCRITERIA_UNREAD:
2187                         result = imap_search_new(IMAP_SEARCH_CRITERIA_UNREAD, NULL, NULL, 0);
2188                         break;
2189
2190                 case MATCHCRITERIA_NEW:
2191                         result = imap_search_new(IMAP_SEARCH_CRITERIA_NEW, NULL, NULL, 0);
2192                         break;
2193
2194                 case MATCHCRITERIA_MARKED:
2195                         result = imap_search_new(IMAP_SEARCH_CRITERIA_MARKED, NULL, NULL, 0);
2196                         break;
2197
2198                 case MATCHCRITERIA_DELETED:
2199                         result = imap_search_new(IMAP_SEARCH_CRITERIA_DELETED, NULL, NULL, 0);
2200                         break;
2201
2202                 case MATCHCRITERIA_REPLIED:
2203                         result = imap_search_new(IMAP_SEARCH_CRITERIA_REPLIED, NULL, NULL, 0);
2204                         break;
2205
2206                 case MATCHCRITERIA_TAG:
2207                         {
2208                                 gchar *tmp = imap_utf8_to_modified_utf7(match->expr, TRUE);
2209                                 result = imap_search_new(IMAP_SEARCH_CRITERIA_TAG, NULL, tmp, 0);
2210                                 g_free(tmp);
2211                         }
2212                         break;
2213
2214                 case MATCHCRITERIA_SUBJECT:
2215                         result = imap_search_new(IMAP_SEARCH_CRITERIA_SUBJECT, NULL, match->expr, 0);
2216                         break;
2217
2218                 case MATCHCRITERIA_FROM:
2219                         result = imap_search_new(IMAP_SEARCH_CRITERIA_FROM, NULL, match->expr, 0);
2220                         break;
2221
2222                 case MATCHCRITERIA_TO:
2223                         result = imap_search_new(IMAP_SEARCH_CRITERIA_TO, NULL, match->expr, 0);
2224                         break;
2225
2226                 case MATCHCRITERIA_CC:
2227                         result = imap_search_new(IMAP_SEARCH_CRITERIA_CC, NULL, match->expr, 0);
2228                         break;
2229
2230                 case MATCHCRITERIA_AGE_GREATER:
2231                         result = imap_search_new(IMAP_SEARCH_CRITERIA_AGE_GREATER, NULL, NULL, match->value);
2232                         break;
2233
2234                 case MATCHCRITERIA_AGE_LOWER:
2235                         result = imap_search_new(IMAP_SEARCH_CRITERIA_AGE_LOWER, NULL, NULL, match->value);
2236                         break;
2237
2238                 case MATCHCRITERIA_BODY_PART:
2239                         result = imap_search_new(IMAP_SEARCH_CRITERIA_BODY, NULL, match->expr, 0);
2240                         break;
2241
2242                 case MATCHCRITERIA_MESSAGE:
2243                         result = imap_search_new(IMAP_SEARCH_CRITERIA_MESSAGE, NULL, match->expr, 0);
2244                         break;
2245
2246                 case MATCHCRITERIA_HEADER:
2247                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, match->header, match->expr, 0);
2248                         break;
2249
2250                 case MATCHCRITERIA_SIZE_GREATER:
2251                         result = imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_GREATER, NULL, NULL, match->value);
2252                         break;
2253
2254                 case MATCHCRITERIA_SIZE_SMALLER:
2255                         result = imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_SMALLER, NULL, NULL, match->value);
2256                         break;
2257
2258                 default:
2259                         result = imap_search_new(IMAP_SEARCH_CRITERIA_ALL, NULL, NULL, 0);
2260                         if (is_all) {
2261                                 *is_all = TRUE;
2262                         }
2263                         break;
2264                 }
2265
2266                 if (invert) {
2267                         result = imap_search_not(result);
2268                         if (is_all && *is_all) {
2269                                 *is_all = FALSE;
2270                         }
2271                 }
2272
2273                 return result;
2274         }
2275
2276         return NULL;
2277 }
2278
2279 static void imap_change_search_charset(IMAPFolder *folder)
2280 {
2281         /* If server supports charset in searches, but the last used one failed,
2282          * changed to the next preferred charset. If none are still available,
2283          * disable charset searches.
2284          * Charsets are tried in the following order:
2285          * UTF-8, locale's charset, UTF-7.
2286          */
2287
2288         if (folder->search_charset_supported) {
2289                 if (folder->search_charset && !strcmp(folder->search_charset, conv_get_locale_charset_str_no_utf8()))
2290                         folder->search_charset = "UTF-8";
2291                 else if (folder->search_charset && !strcmp(folder->search_charset, "UTF-8"))
2292                         folder->search_charset = "UTF-7";
2293                 else {
2294                         folder->search_charset = NULL;
2295                         folder->search_charset_supported = FALSE;
2296                 }
2297         }
2298 }
2299
2300 static MatcherProp *imap_matcher_prop_set_charset(IMAPFolder *folder,
2301                                                   MatcherProp *utf8_prop,
2302                                                   gchar **charset)
2303 {
2304         /* If the match is going to be done locally, or the criteria is on
2305          * tag (special-cased to modified-UTF-7), or the expression searched
2306          * is ASCII, don't bother converting.
2307          */
2308         if (imap_matcher_type_is_local(utf8_prop->criteria)
2309          || utf8_prop->criteria == MATCHCRITERIA_TAG
2310          || utf8_prop->criteria == MATCHCRITERIA_NOT_TAG
2311          || utf8_prop->expr == NULL
2312          || is_ascii_str(utf8_prop->expr))
2313                 return matcherprop_new(utf8_prop->criteria,
2314                                utf8_prop->header,
2315                                utf8_prop->matchtype,
2316                                utf8_prop->expr,
2317                                utf8_prop->value);
2318         else {
2319                 gchar *conv_expr = NULL;
2320
2321                 /* If the search is server-side and the server doesn't support
2322                  * searching with the charsets we handle, bail out.
2323                  */
2324                 if (folder->search_charset_supported == FALSE)
2325                         return NULL;
2326
2327                 /* Else, convert. */
2328                 if (*charset == NULL)
2329                         *charset = g_strdup(folder->search_charset);
2330
2331                 conv_expr = conv_codeset_strdup(utf8_prop->expr, CS_UTF_8, *charset);
2332
2333                 if (conv_expr == NULL)
2334                         conv_expr = g_strdup(utf8_prop->expr);
2335
2336                 return matcherprop_new(utf8_prop->criteria,
2337                                utf8_prop->header,
2338                                utf8_prop->matchtype,
2339                                conv_expr,
2340                                utf8_prop->value);
2341         }
2342 }
2343
2344 static gint     search_msgs             (Folder                 *folder,
2345                                          FolderItem             *container,
2346                                          MsgNumberList          **msgs,
2347                                          gboolean               *on_server,
2348                                          MatcherList            *predicate,
2349                                          SearchProgressNotify   progress_cb,
2350                                          gpointer               progress_data)
2351 {
2352         IMAPSearchKey* key = NULL;
2353         GSList* cur;
2354         int result = -1;
2355         clist* uidlist = NULL;
2356         gboolean server_filtering_useless = FALSE;
2357         IMAPSession *session;
2358         gchar *charset_to_use = NULL;
2359
2360         if (on_server == NULL || !*on_server) {
2361                 return folder_item_search_msgs_local(folder, container, msgs, on_server,
2362                                 predicate, progress_cb, progress_data);
2363         }
2364
2365         for (cur = predicate->matchers; cur != NULL; cur = cur->next) {
2366                 IMAPSearchKey* matcherPart = NULL;
2367                 MatcherProp* prop = (MatcherProp*) cur->data;
2368                 gboolean is_all;
2369                 MatcherProp *imap_prop = imap_matcher_prop_set_charset(IMAP_FOLDER(folder), prop, &charset_to_use);
2370
2371                 if (imap_prop == NULL) {
2372                         /* Couldn't convert matcherprop to IMAP - probably not ascii
2373                          * and server doesn't support the charsets we do. */
2374                          return -1;
2375                 }
2376
2377                 matcherPart = search_make_key(imap_prop, &is_all);
2378
2379                 matcherprop_free(imap_prop);
2380
2381                 if (on_server) {
2382                         *on_server &= matcherPart != NULL && prop->matchtype == MATCHTYPE_MATCHCASE;
2383                 }
2384
2385                 if (matcherPart) {
2386                         if (key == NULL) {
2387                                 key = matcherPart;
2388                                 server_filtering_useless = is_all;
2389                         } else if (predicate->bool_and) {
2390                                 key = imap_search_and(key, matcherPart);
2391                                 server_filtering_useless &= is_all;
2392                         } else {
2393                                 key = imap_search_or(key, matcherPart);
2394                                 server_filtering_useless |= is_all;
2395                         }
2396                 }
2397         }
2398
2399         if (server_filtering_useless) {
2400                 imap_search_free(key);
2401                 key = NULL;
2402         }
2403
2404         if (key == NULL && progress_cb != NULL) {
2405                 GSList* cur;
2406                 GSList* list;
2407                 int count = 0;
2408
2409                 progress_cb(progress_data, TRUE, 0, 0, container->total_msgs);
2410                 progress_cb(progress_data, TRUE, container->total_msgs, 0, container->total_msgs);
2411
2412                 list = folder_item_get_msg_list(container);
2413                 for (cur = list; cur != NULL; cur = cur->next) {
2414                         *msgs = g_slist_prepend(*msgs, GUINT_TO_POINTER(((MsgInfo*) cur->data)->msgnum));
2415                         count++;
2416                 }
2417                 procmsg_msg_list_free(list);
2418
2419                 *msgs = g_slist_reverse(*msgs);
2420
2421                 return count;
2422         }
2423
2424         session = imap_session_get(folder);
2425         if (!session) {
2426                 return -1;
2427         }
2428         result = imap_select(session, IMAP_FOLDER(folder), FOLDER_ITEM(container),
2429                          NULL, NULL, NULL, NULL, NULL, TRUE);
2430         if (result != MAILIMAP_NO_ERROR)
2431                 return -1;
2432
2433         if (progress_cb)
2434                 progress_cb(progress_data, TRUE, 0, 0, container->total_msgs);
2435         result = imap_threaded_search(folder, IMAP_SEARCH_TYPE_KEYED, key, charset_to_use, NULL, &uidlist);
2436         if (progress_cb)
2437                 progress_cb(progress_data, TRUE, container->total_msgs, 0, container->total_msgs);
2438
2439         if (result == MAILIMAP_NO_ERROR) {
2440                 gint result = 0;
2441
2442                 *msgs = imap_uid_list_from_lep(uidlist, &result);
2443
2444                 mailimap_search_result_free(uidlist);
2445
2446                 if (charset_to_use != NULL)
2447                         g_free(charset_to_use);
2448
2449                 return result;
2450         } else if (charset_to_use != NULL) {
2451                 /* If search failed and was on an 8-bit string, try the next
2452                  * available charset to search if there still are some.
2453                  */
2454                 g_free(charset_to_use);
2455
2456                 imap_change_search_charset(IMAP_FOLDER(folder));
2457                 if (IMAP_FOLDER(folder)->search_charset_supported)
2458                         return search_msgs(folder, container, msgs, on_server, predicate,
2459                                    progress_cb, progress_data);
2460                 else
2461                         return -1;
2462         } else {
2463                 return -1;
2464         }
2465 }
2466
2467
2468 static gint imap_do_remove_msgs(Folder *folder, FolderItem *dest,
2469                                 MsgInfoList *msglist, GHashTable *relation)
2470 {
2471         gchar *destdir, *dir;
2472         GSList *numlist = NULL, *cur;
2473         MsgInfo *msginfo;
2474         IMAPSession *session;
2475         gint ok = MAILIMAP_NO_ERROR;
2476
2477         g_return_val_if_fail(folder != NULL, -1);
2478         g_return_val_if_fail(dest != NULL, -1);
2479         g_return_val_if_fail(msglist != NULL, -1);
2480
2481         debug_print("getting session...\n");
2482         session = imap_session_get(folder);
2483         if (!session) {
2484                 return -1;
2485         }
2486
2487         lock_session(session); /* unlocked later in the function */
2488
2489         msginfo = (MsgInfo *)msglist->data;
2490
2491         ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
2492                          NULL, NULL, NULL, NULL, NULL, FALSE);
2493         if (ok != MAILIMAP_NO_ERROR) {
2494                 return ok;
2495         }
2496
2497         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
2498         if (is_fatal(ok)) {
2499                 g_free(destdir);
2500                 return ok;
2501         }
2502         for (cur = msglist; cur; cur = cur->next) {
2503                 msginfo = (MsgInfo *)cur->data;
2504                 if (!MSG_IS_DELETED(msginfo->flags))
2505                         numlist = g_slist_prepend(numlist, GINT_TO_POINTER(msginfo->msgnum));
2506         }
2507         numlist = g_slist_reverse(numlist);
2508
2509         if (numlist != NULL) {
2510                 ok = imap_set_message_flags
2511                         (session, IMAP_FOLDER_ITEM(msginfo->folder), numlist, IMAP_FLAG_DELETED, NULL, TRUE);
2512                 if (ok != MAILIMAP_NO_ERROR) {
2513                         log_warning(LOG_PROTOCOL, _("can't set deleted flags\n"));
2514                         g_free(destdir);
2515                         return ok;
2516                 }
2517         } /* else we just need to expunge */
2518         ok = imap_cmd_expunge(session, folder->account->imap_use_trash);
2519         if (ok != MAILIMAP_NO_ERROR) {
2520                 log_warning(LOG_PROTOCOL, _("can't expunge\n"));
2521                 g_free(destdir);
2522                 return ok;
2523         }
2524
2525         session->folder_content_changed = TRUE;
2526         unlock_session(session);
2527
2528         dir = folder_item_get_path(msginfo->folder);
2529         if (is_dir_exist(dir)) {
2530                 for (cur = msglist; cur; cur = cur->next) {
2531                         msginfo = (MsgInfo *)cur->data;
2532                         remove_numbered_files(dir, msginfo->msgnum, msginfo->msgnum);
2533                 }
2534         }
2535         g_free(dir);
2536
2537         g_slist_free(numlist);
2538
2539         imap_scan_required(folder, dest);
2540
2541         g_free(destdir);
2542
2543         return 0;
2544 }
2545
2546 static gint imap_remove_msgs(Folder *folder, FolderItem *dest,
2547                     MsgInfoList *msglist, GHashTable *relation)
2548 {
2549         MsgInfo *msginfo;
2550
2551         g_return_val_if_fail(folder != NULL, -1);
2552         g_return_val_if_fail(dest != NULL, -1);
2553         if (msglist == NULL)
2554                 return 0;
2555
2556         msginfo = (MsgInfo *)msglist->data;
2557         g_return_val_if_fail(msginfo->folder != NULL, -1);
2558
2559         return imap_do_remove_msgs(folder, dest, msglist, relation);
2560 }
2561
2562 static gint imap_remove_all_msg(Folder *folder, FolderItem *item)
2563 {
2564         GSList *list = folder_item_get_msg_list(item);
2565         gint res = imap_remove_msgs(folder, item, list, NULL);
2566         procmsg_msg_list_free(list);
2567         return res;
2568 }
2569
2570 static gboolean imap_is_msg_changed(Folder *folder, FolderItem *item,
2571                                     MsgInfo *msginfo)
2572 {
2573         /* TODO: properly implement this method */
2574         return FALSE;
2575 }
2576
2577 static gint imap_close(Folder *folder, FolderItem *item)
2578 {
2579         return 0;
2580 }
2581
2582 static gint imap_scan_tree_real(Folder *folder, gboolean subs_only)
2583 {
2584         FolderItem *item = NULL;
2585         IMAPSession *session;
2586         gchar *root_folder = NULL;
2587
2588         g_return_val_if_fail(folder != NULL, -1);
2589         g_return_val_if_fail(folder->account != NULL, -1);
2590
2591         debug_print("getting session...\n");
2592         session = imap_session_get(folder);
2593         if (!session) {
2594                 if (!folder->node) {
2595                         folder_tree_destroy(folder);
2596                         item = folder_item_new(folder, folder->name, NULL);
2597                         item->folder = folder;
2598                         folder->node = item->node = g_node_new(item);
2599                 }
2600                 return -1;
2601         }
2602
2603         if (folder->account->imap_dir && *folder->account->imap_dir) {
2604                 gchar *real_path;
2605                 int r = MAILIMAP_NO_ERROR;
2606                 clist * lep_list;
2607
2608                 Xstrdup_a(root_folder, folder->account->imap_dir, {return -1;});
2609                 extract_quote(root_folder, '"');
2610                 subst_char(root_folder,
2611                            imap_get_path_separator(session, IMAP_FOLDER(folder),
2612                                                    root_folder, &r),
2613                            '/');
2614                 if (is_fatal(r))
2615                         return -1;
2616                 strtailchomp(root_folder, '/');
2617                 real_path = imap_get_real_path
2618                         (session, IMAP_FOLDER(folder), root_folder, &r);
2619                 if (is_fatal(r)) {
2620                         g_free(real_path);
2621                         return -1;
2622                 }
2623                 debug_print("IMAP root directory: %s\n", real_path);
2624
2625                 /* check if root directory exist */
2626
2627                 r = imap_threaded_list(session->folder, "", real_path,
2628                                        &lep_list);
2629
2630                 if (r != MAILIMAP_NO_ERROR)
2631                         imap_handle_error(SESSION(session), NULL, r);
2632
2633                 if ((r != MAILIMAP_NO_ERROR) || (clist_count(lep_list) == 0)) {
2634                         if (!folder->node) {
2635                                 item = folder_item_new(folder, folder->name, NULL);
2636                                 item->folder = folder;
2637                                 folder->node = item->node = g_node_new(item);
2638                         }
2639                         return -1;
2640                 }
2641                 mailimap_list_result_free(lep_list);
2642
2643                 g_free(real_path);
2644         }
2645
2646         if (folder->node)
2647                 item = FOLDER_ITEM(folder->node->data);
2648
2649         if (item && !item->path && root_folder) {
2650                 item->path = g_strdup(root_folder);
2651         }
2652
2653         if (!item || ((item->path || root_folder) &&
2654                       strcmp2(item->path, root_folder) != 0)) {
2655                 folder_tree_destroy(folder);
2656                 item = folder_item_new(folder, folder->name, root_folder);
2657                 item->folder = folder;
2658                 folder->node = item->node = g_node_new(item);
2659         }
2660
2661         imap_scan_tree_recursive(session, FOLDER_ITEM(folder->node->data), subs_only);
2662         imap_create_missing_folders(folder);
2663
2664         return 0;
2665 }
2666
2667 static gint imap_scan_tree(Folder *folder)
2668 {
2669         gboolean subs_only = FALSE;
2670         if (folder->account) {
2671                 debug_print(" scanning only subs %d\n", folder->account->imap_subsonly);
2672                 subs_only = folder->account->imap_subsonly;
2673         }
2674         return imap_scan_tree_real(folder, subs_only);
2675 }
2676
2677 static gint imap_scan_tree_recursive(IMAPSession *session, FolderItem *item, gboolean subs_only)
2678 {
2679         Folder *folder;
2680         IMAPFolder *imapfolder;
2681         FolderItem *new_item;
2682         GSList *item_list, *cur;
2683         GNode *node;
2684         gchar *real_path;
2685         gchar *wildcard_path;
2686         gchar separator;
2687         gchar wildcard[3];
2688         clist * lep_list;
2689         int r = MAILIMAP_NO_ERROR;
2690
2691         g_return_val_if_fail(item != NULL, -1);
2692         g_return_val_if_fail(item->folder != NULL, -1);
2693         g_return_val_if_fail(item->no_sub == FALSE, -1);
2694
2695         folder = item->folder;
2696         imapfolder = IMAP_FOLDER(folder);
2697
2698         separator = imap_get_path_separator(session, imapfolder, item->path, &r);
2699         if (is_fatal(r))
2700                 return r;
2701
2702         if (folder->ui_func)
2703                 folder->ui_func(folder, item, folder->ui_func_data);
2704
2705         if (item->path) {
2706                 wildcard[0] = separator;
2707                 wildcard[1] = '%';
2708                 wildcard[2] = '\0';
2709                 real_path = imap_get_real_path(session, imapfolder, item->path, &r);
2710                 if (is_fatal(r)) {
2711                         g_free(real_path);
2712                         return r;
2713                 }
2714         } else {
2715                 wildcard[0] = '%';
2716                 wildcard[1] = '\0';
2717                 real_path = g_strdup("");
2718         }
2719
2720         Xstrcat_a(wildcard_path, real_path, wildcard,
2721                   {g_free(real_path); return MAILIMAP_ERROR_BAD_STATE;});
2722         lep_list = NULL;
2723
2724         if (subs_only)
2725                 r = imap_threaded_lsub(folder, "", wildcard_path, &lep_list);
2726         else
2727                 r = imap_threaded_list(folder, "", wildcard_path, &lep_list);
2728
2729         if (r != MAILIMAP_NO_ERROR) {
2730                 imap_handle_error(SESSION(session), NULL, r);
2731                 item_list = NULL;
2732                 g_free(real_path);
2733                 return r;
2734         }
2735         else {
2736                 item_list = imap_list_from_lep(imapfolder,
2737                                                lep_list, real_path, FALSE);
2738                 mailimap_list_result_free(lep_list);
2739         }
2740
2741         g_free(real_path);
2742
2743         node = item->node->children;
2744         while (node != NULL) {
2745                 FolderItem *old_item = FOLDER_ITEM(node->data);
2746                 GNode *next = node->next;
2747
2748                 new_item = NULL;
2749                 for (cur = item_list; cur != NULL; cur = cur->next) {
2750                         FolderItem *cur_item = FOLDER_ITEM(cur->data);
2751                         if (!strcmp2(old_item->path, cur_item->path)) {
2752                                 new_item = cur_item;
2753                                 break;
2754                         }
2755                 }
2756                 if (!new_item) {
2757                         if (old_item && old_item->path && !strcasecmp(old_item->path, "INBOX")) {
2758                                 debug_print("not removing INBOX\n");
2759                         } else {
2760                                 debug_print("folder '%s' not found. removing...\n",
2761                                             old_item->path);
2762                                 folder_item_remove(old_item);
2763                         }
2764                 } else {
2765                         old_item->no_sub = new_item->no_sub;
2766                         old_item->no_select = new_item->no_select;
2767                         if (old_item->no_sub == TRUE && node->children) {
2768                                 debug_print("folder '%s' doesn't have "
2769                                             "subfolders. removing...\n",
2770                                             old_item->path);
2771                                 folder_item_remove_children(old_item);
2772                         }
2773                 }
2774
2775                 node = next;
2776         }
2777
2778         for (cur = item_list; cur != NULL; cur = cur->next) {
2779                 FolderItem *cur_item = FOLDER_ITEM(cur->data);
2780                 new_item = NULL;
2781
2782                 for (node = item->node->children; node != NULL;
2783                      node = node->next) {
2784                         if (!strcmp2(FOLDER_ITEM(node->data)->path,
2785                                      cur_item->path)) {
2786                                 new_item = FOLDER_ITEM(node->data);
2787                                 folder_item_destroy(cur_item);
2788                                 cur_item = NULL;
2789                                 break;
2790                         }
2791                 }
2792                 if (!new_item) {
2793                         new_item = cur_item;
2794                         debug_print("new folder '%s' found.\n", new_item->path);
2795                         folder_item_append(item, new_item);
2796                 }
2797
2798                 if (!strcasecmp(new_item->path, "INBOX")) {
2799                         new_item->stype = F_INBOX;
2800                         folder->inbox = new_item;
2801                 } else if (!folder_item_parent(item) || item->stype == F_INBOX) {
2802                         gchar *base;
2803
2804                         base = g_path_get_basename(new_item->path);
2805
2806                         if (!folder->outbox && !g_ascii_strcasecmp(base, "Sent")) {
2807                                 new_item->stype = F_OUTBOX;
2808                                 folder->outbox = new_item;
2809                         } else if (!folder->draft && (!g_ascii_strcasecmp(base, "Drafts") || !g_ascii_strcasecmp(base, "Draft"))) {
2810                                 new_item->stype = F_DRAFT;
2811                                 folder->draft = new_item;
2812                         } else if (!folder->queue && !g_ascii_strcasecmp(base, "Queue")) {
2813                                 new_item->stype = F_QUEUE;
2814                                 folder->queue = new_item;
2815                         } else if (!folder->trash && !g_ascii_strcasecmp(base, "Trash")) {
2816                                 new_item->stype = F_TRASH;
2817                                 folder->trash = new_item;
2818                         }
2819                         g_free(base);
2820                 }
2821
2822                 if (new_item->no_sub == FALSE)
2823                         imap_scan_tree_recursive(session, new_item, subs_only);
2824         }
2825
2826         g_slist_free(item_list);
2827
2828         return MAILIMAP_NO_ERROR;
2829 }
2830
2831 GList *imap_scan_subtree(Folder *folder, FolderItem *item, gboolean unsubs_only, gboolean recursive)
2832 {
2833         IMAPSession *session = imap_session_get(folder);
2834         gchar *real_path;
2835         gchar *wildcard_path;
2836         gchar separator;
2837         gchar wildcard[3];
2838         clist * lep_list;
2839         GSList *item_list = NULL, *cur;
2840         GList *child_list = NULL, *tmplist = NULL;
2841         GSList *sub_list = NULL;
2842         int r = MAILIMAP_NO_ERROR;
2843
2844         if (!session)
2845                 return NULL;
2846
2847         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &r);
2848         if (is_fatal(r))
2849                 return NULL;
2850
2851         if (item->path) {
2852                 wildcard[0] = separator;
2853                 wildcard[1] = '%';
2854                 wildcard[2] = '\0';
2855                 real_path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &r);
2856                 if (is_fatal(r)) {
2857                         g_free(real_path);
2858                         return NULL;
2859                 }
2860         } else {
2861                 wildcard[0] = '%';
2862                 wildcard[1] = '\0';
2863                 real_path = g_strdup("");
2864         }
2865
2866         Xstrcat_a(wildcard_path, real_path, wildcard,
2867                   {g_free(real_path); return NULL;});
2868         lep_list = NULL;
2869
2870         if (unsubs_only)
2871                 statusbar_print_all(_("Looking for unsubscribed folders in %s..."),
2872                                 item->path?item->path:item->name);
2873         else
2874                 statusbar_print_all(_("Looking for subfolders of %s..."),
2875                                 item->path?item->path:item->name);
2876
2877         r = imap_threaded_list(folder, "", wildcard_path, &lep_list);
2878         if (r) {
2879                 g_free(real_path);
2880                 statusbar_pop_all();
2881                 return NULL;
2882         }
2883         item_list = imap_list_from_lep(IMAP_FOLDER(folder),
2884                                lep_list, real_path, FALSE);
2885         mailimap_list_result_free(lep_list);
2886
2887         for (cur = item_list; cur != NULL; cur = cur->next) {
2888                 FolderItem *cur_item = FOLDER_ITEM(cur->data);
2889                 if (recursive) {
2890                         tmplist = imap_scan_subtree(folder, cur_item,
2891                                         unsubs_only, recursive);
2892                         if (tmplist)
2893                                 child_list = g_list_concat(child_list, tmplist);
2894                 }
2895                 child_list = g_list_prepend(child_list,
2896                                 imap_get_real_path(session,
2897                                         IMAP_FOLDER(folder), cur_item->path, &r));
2898                 if (is_fatal(r)) {
2899                         g_free(real_path);
2900                         statusbar_pop_all();
2901                         return NULL;
2902                 }
2903                 folder_item_destroy(cur_item);
2904         }
2905         child_list = g_list_reverse(child_list);
2906         g_slist_free(item_list);
2907
2908         if (unsubs_only) {
2909                 r = imap_threaded_lsub(folder, "", wildcard_path, &lep_list);
2910                 if (r) {
2911                         g_free(real_path);
2912                         statusbar_pop_all();
2913                         return NULL;
2914                 }
2915                 sub_list = imap_list_from_lep(IMAP_FOLDER(folder),
2916                                        lep_list, real_path, FALSE);
2917                 mailimap_list_result_free(lep_list);
2918
2919                 for (cur = sub_list; cur != NULL; cur = cur->next) {
2920                         FolderItem *cur_item = FOLDER_ITEM(cur->data);
2921                         GList *oldlitem = NULL;
2922                         gchar *tmp = imap_get_real_path(session,
2923                                         IMAP_FOLDER(folder), cur_item->path, &r);
2924                         if (r) {
2925                                 g_free(real_path);
2926                                 statusbar_pop_all();
2927                                 g_free(tmp);
2928                                 return NULL;
2929                         }
2930                         folder_item_destroy(cur_item);
2931                         oldlitem = g_list_find_custom(
2932                                         child_list, tmp, (GCompareFunc)strcmp2);
2933                         if (oldlitem) {
2934                                 child_list = g_list_remove_link(child_list, oldlitem);
2935                                 g_free(oldlitem->data);
2936                                 g_list_free(oldlitem);
2937                         }
2938                         g_free(tmp);
2939                 }
2940         }
2941
2942         g_free(real_path);
2943         statusbar_pop_all();
2944
2945         return child_list;
2946 }
2947
2948 static gint imap_create_tree(Folder *folder)
2949 {
2950         g_return_val_if_fail(folder != NULL, -1);
2951         g_return_val_if_fail(folder->node != NULL, -1);
2952         g_return_val_if_fail(folder->node->data != NULL, -1);
2953         g_return_val_if_fail(folder->account != NULL, -1);
2954
2955         imap_scan_tree(folder);
2956         imap_create_missing_folders(folder);
2957
2958         return 0;
2959 }
2960
2961 static void imap_create_missing_folders(Folder *folder)
2962 {
2963         g_return_if_fail(folder != NULL);
2964
2965         if (!folder->inbox)
2966                 folder->inbox = imap_create_special_folder
2967                         (folder, F_INBOX, "INBOX");
2968         if (!folder->trash)
2969                 folder->trash = imap_create_special_folder
2970                         (folder, F_TRASH, "Trash");
2971         if (!folder->queue)
2972                 folder->queue = imap_create_special_folder
2973                         (folder, F_QUEUE, "Queue");
2974         if (!folder->outbox)
2975                 folder->outbox = imap_create_special_folder
2976                         (folder, F_OUTBOX, "Sent");
2977         if (!folder->draft)
2978                 folder->draft = imap_create_special_folder
2979                         (folder, F_DRAFT, "Drafts");
2980 }
2981
2982 static FolderItem *imap_create_special_folder(Folder *folder,
2983                                               SpecialFolderItemType stype,
2984                                               const gchar *name)
2985 {
2986         FolderItem *item;
2987         FolderItem *new_item;
2988
2989         g_return_val_if_fail(folder != NULL, NULL);
2990         g_return_val_if_fail(folder->node != NULL, NULL);
2991         g_return_val_if_fail(folder->node->data != NULL, NULL);
2992         g_return_val_if_fail(folder->account != NULL, NULL);
2993         g_return_val_if_fail(name != NULL, NULL);
2994
2995         item = FOLDER_ITEM(folder->node->data);
2996         new_item = imap_create_folder(folder, item, name);
2997
2998         if (!new_item) {
2999                 g_warning("Can't create '%s'", name);
3000                 if (!folder->inbox) return NULL;
3001
3002                 new_item = imap_create_folder(folder, folder->inbox, name);
3003                 if (!new_item)
3004                         g_warning("Can't create '%s' under INBOX", name);
3005                 else
3006                         new_item->stype = stype;
3007         } else
3008                 new_item->stype = stype;
3009
3010         return new_item;
3011 }
3012
3013 static gchar *imap_folder_get_path(Folder *folder)
3014 {
3015         gchar *folder_path;
3016
3017         g_return_val_if_fail(folder != NULL, NULL);
3018         g_return_val_if_fail(folder->account != NULL, NULL);
3019
3020 #ifdef G_OS_WIN32
3021         gchar *sanitized_dirname = g_strdup(folder->account->recv_server);
3022         g_strdelimit(sanitized_dirname, ":", ',');
3023 #endif
3024
3025         folder_path = g_strconcat(get_imap_cache_dir(),
3026                                   G_DIR_SEPARATOR_S,
3027 #ifdef G_OS_WIN32
3028                                                                                                                                         sanitized_dirname,
3029 #else
3030                                   folder->account->recv_server,
3031 #endif
3032                                   G_DIR_SEPARATOR_S,
3033                                   folder->account->userid,
3034                                   NULL);
3035
3036 #ifdef G_OS_WIN32
3037         g_free(sanitized_dirname);
3038 #endif
3039         return folder_path;
3040 }
3041
3042 #ifdef G_OS_WIN32
3043 static gchar *imap_encode_unsafe_chars(const gchar *str)
3044 {
3045         gchar *ret = NULL, *o_ret;
3046         gchar *i;
3047         if (!str)
3048                 return NULL;
3049         ret = g_malloc(3*strlen(str)+1);
3050         o_ret = ret;
3051         for (i = str; *i; i++) {
3052                 switch(*i) {
3053                         case ':':
3054                         case '|':
3055                         case '<':
3056                         case '>':
3057                         case '*':
3058                         case '?':
3059                         case '#':
3060                                 *ret++ = '%';
3061                                 *ret++ = '0'+(*i/10);
3062                                 *ret++ = '0'+(*i%10);
3063                                 break;
3064                         default:
3065                                 *ret++ = *i;
3066                 }
3067         }
3068         *ret++ = '\0';
3069         return o_ret;
3070 }
3071 #endif
3072 static gchar *imap_item_get_path(Folder *folder, FolderItem *item)
3073 {
3074         gchar *folder_path, *path;
3075         gchar *item_path = NULL;
3076
3077         g_return_val_if_fail(folder != NULL, NULL);
3078         g_return_val_if_fail(item != NULL, NULL);
3079         folder_path = imap_folder_get_path(folder);
3080
3081         g_return_val_if_fail(folder_path != NULL, NULL);
3082
3083 #ifdef G_OS_UNIX
3084         item_path = g_strdup(item->path);
3085 #else
3086         item_path = imap_encode_unsafe_chars(item->path);
3087 #endif
3088
3089         if (g_path_is_absolute(folder_path)) {
3090                 if (item_path)
3091                         path = g_strconcat(folder_path, G_DIR_SEPARATOR_S,
3092                                            item_path, NULL);
3093                 else
3094                         path = g_strdup(folder_path);
3095         } else {
3096                 if (item_path)
3097                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
3098                                            folder_path, G_DIR_SEPARATOR_S,
3099                                            item_path, NULL);
3100                 else
3101                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
3102                                            folder_path, NULL);
3103         }
3104         g_free(folder_path);
3105         g_free(item_path);
3106 #ifdef G_OS_WIN32
3107         while (strchr(path, '/'))
3108                 *strchr(path, '/') = '\\';
3109 #endif
3110
3111         return path;
3112 }
3113
3114 static FolderItem *imap_create_folder(Folder *folder, FolderItem *parent,
3115                                const gchar *name)
3116 {
3117         gchar *dirpath, *imap_path;
3118         IMAPSession *session;
3119         FolderItem *new_item;
3120         gchar separator;
3121         gchar *new_name;
3122         const gchar *p;
3123         gint ok = MAILIMAP_NO_ERROR;
3124         gboolean no_select = FALSE, no_sub = FALSE;
3125         gboolean exist = FALSE;
3126
3127         g_return_val_if_fail(folder != NULL, NULL);
3128         g_return_val_if_fail(folder->account != NULL, NULL);
3129         g_return_val_if_fail(parent != NULL, NULL);
3130         g_return_val_if_fail(name != NULL, NULL);
3131
3132         if (to_number(name) > 0) {
3133                 gchar *cached_msg = imap_get_cached_filename(parent, to_number(name));
3134                 if (is_file_exist(cached_msg)) {
3135                         if (claws_unlink(cached_msg) != 0) {
3136                                 return NULL;
3137                         }
3138                 }
3139         }
3140
3141         debug_print("getting session...\n");
3142         session = imap_session_get(folder);
3143         if (!session) {
3144                 return NULL;
3145         }
3146
3147         if (!folder_item_parent(parent) && strcasecmp(name, "INBOX") == 0) {
3148                 dirpath = g_strdup(name);
3149         }else if (parent->path)
3150                 dirpath = g_strconcat(parent->path, "/", name, NULL);
3151         else if ((p = strchr(name, '/')) != NULL && *(p + 1) != '\0')
3152                 dirpath = g_strdup(name);
3153         else if (folder->account->imap_dir && *folder->account->imap_dir) {
3154                 gchar *imap_dir;
3155
3156                 Xstrdup_a(imap_dir, folder->account->imap_dir, {return NULL;});
3157                 strtailchomp(imap_dir, '/');
3158                 dirpath = g_strconcat(imap_dir, "/", name, NULL);
3159         } else
3160                 dirpath = g_strdup(name);
3161
3162
3163
3164         /* keep trailing directory separator to create a folder that contains
3165            sub folder */
3166         imap_path = imap_utf8_to_modified_utf7(dirpath, FALSE);
3167
3168         strtailchomp(dirpath, '/');
3169         Xstrdup_a(new_name, name, {
3170                 g_free(dirpath);
3171                 g_free(imap_path);
3172                 return NULL;});
3173
3174         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), imap_path, &ok);
3175         if (is_fatal(ok)) {
3176                 g_free(imap_path);
3177                 return NULL;
3178         }
3179         imap_path_separator_subst(imap_path, separator);
3180         /* remove trailing / for display */
3181         strtailchomp(new_name, '/');
3182
3183         if (strcasecmp(dirpath, "INBOX") != 0) {
3184                 GPtrArray *argbuf;
3185                 int r;
3186                 clist * lep_list;
3187
3188                 argbuf = g_ptr_array_new();
3189                 r = imap_threaded_list(folder, "", imap_path, &lep_list);
3190                 if (r != MAILIMAP_NO_ERROR) {
3191                         imap_handle_error(SESSION(session), NULL, r);
3192                         log_warning(LOG_PROTOCOL, _("can't create mailbox: LIST failed\n"));
3193                         g_free(imap_path);
3194                         g_free(dirpath);
3195                         ptr_array_free_strings(argbuf);
3196                         g_ptr_array_free(argbuf, TRUE);
3197                         return NULL;
3198                 }
3199
3200                 if (clist_count(lep_list) > 0)
3201                         exist = TRUE;
3202                 mailimap_list_result_free(lep_list);
3203                 lep_list = NULL;
3204                 if (!exist) {
3205                         ok = imap_cmd_create(session, imap_path);
3206                         if (ok != MAILIMAP_NO_ERROR) {
3207                                 log_warning(LOG_PROTOCOL, _("can't create mailbox\n"));
3208                                 g_free(imap_path);
3209                                 g_free(dirpath);
3210                                 return NULL;
3211                         }
3212                         r = imap_threaded_list(folder, "", imap_path, &lep_list);
3213                         if (r == MAILIMAP_NO_ERROR) {
3214                                 GSList *item_list = imap_list_from_lep(IMAP_FOLDER(folder),
3215                                                lep_list, dirpath, TRUE);
3216                                 if (item_list) {
3217                                         FolderItem *cur_item = FOLDER_ITEM(item_list->data);
3218                                         no_select = cur_item->no_select;
3219                                         no_sub = cur_item->no_sub;
3220                                         g_slist_free(item_list);
3221                                 }
3222                                 mailimap_list_result_free(lep_list);
3223                         } else {
3224                                 imap_handle_error(SESSION(session), NULL, r);
3225                         }
3226                 }
3227                 imap_threaded_subscribe(folder, imap_path, TRUE);
3228         } else {
3229                 clist *lep_list;
3230                 int r;
3231                 /* just get flags */
3232                 r = imap_threaded_list(folder, "", "INBOX", &lep_list);
3233                 if (r == MAILIMAP_NO_ERROR) {
3234                         GSList *item_list = imap_list_from_lep(IMAP_FOLDER(folder),
3235                                        lep_list, dirpath, TRUE);
3236                         if (item_list) {
3237                                 FolderItem *cur_item = FOLDER_ITEM(item_list->data);
3238                                 no_select = cur_item->no_select;
3239                                 no_sub = cur_item->no_sub;
3240                                 g_slist_free(item_list);
3241                         }
3242                         mailimap_list_result_free(lep_list);
3243                 } else {
3244                         imap_handle_error(SESSION(session), NULL, r);
3245                 }
3246         }
3247
3248         new_item = folder_item_new(folder, new_name, dirpath);
3249         new_item->no_select = no_select;
3250         new_item->no_sub = no_sub;
3251         folder_item_append(parent, new_item);
3252         g_free(imap_path);
3253         g_free(dirpath);
3254
3255         dirpath = folder_item_get_path(new_item);
3256         if (!is_dir_exist(dirpath))
3257                 make_dir_hier(dirpath);
3258         g_free(dirpath);
3259
3260         if (exist) {
3261                 /* folder existed, scan it */
3262                 imap_scan_required(folder, new_item);
3263                 folder_item_scan_full(new_item, FALSE);
3264         }
3265
3266         return new_item;
3267 }
3268
3269 static gint imap_rename_folder(Folder *folder, FolderItem *item,
3270                                const gchar *name)
3271 {
3272         gchar *dirpath;
3273         gchar *newpath;
3274         gchar *real_oldpath;
3275         gchar *real_newpath;
3276         gchar *paths[2];
3277         gchar *old_cache_dir;
3278         gchar *new_cache_dir;
3279         IMAPSession *session;
3280         gchar separator;
3281         gint ok = MAILIMAP_NO_ERROR;
3282         gint exists, recent, unseen;
3283         guint32 uid_validity;
3284
3285         g_return_val_if_fail(folder != NULL, -1);
3286         g_return_val_if_fail(item != NULL, -1);
3287         g_return_val_if_fail(item->path != NULL, -1);
3288         g_return_val_if_fail(name != NULL, -1);
3289
3290         debug_print("getting session...\n");
3291         session = imap_session_get(folder);
3292         if (!session) {
3293                 return -1;
3294         }
3295
3296         if (strchr(name, imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &ok)) != NULL ||
3297                 is_fatal(ok)) {
3298                 g_warning("New folder name must not contain the namespace "
3299                             "path separator");
3300                 return -1;
3301         }
3302
3303         real_oldpath = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &ok);
3304         if (is_fatal(ok)) {
3305                 g_free(real_oldpath);
3306                 return -1;
3307         }
3308
3309         g_free(session->mbox);
3310         session->mbox = NULL;
3311         session->exists = 0;
3312         session->recent = 0;
3313         session->expunge = 0;
3314         ok = imap_cmd_examine(session, "INBOX",
3315                               &exists, &recent, &unseen, &uid_validity, FALSE);
3316         if (ok != MAILIMAP_NO_ERROR) {
3317                 g_free(real_oldpath);
3318                 return -1;
3319         }
3320
3321         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &ok);
3322         if (is_fatal(ok)) {
3323                 g_free(real_oldpath);
3324                 return -1;
3325         }
3326         if (strchr(item->path, G_DIR_SEPARATOR)) {
3327                 dirpath = g_path_get_dirname(item->path);
3328                 newpath = g_strconcat(dirpath, G_DIR_SEPARATOR_S, name, NULL);
3329                 g_free(dirpath);
3330         } else
3331                 newpath = g_strdup(name);
3332
3333         real_newpath = imap_utf8_to_modified_utf7(newpath, FALSE);
3334         imap_path_separator_subst(real_newpath, separator);
3335
3336         ok = imap_cmd_rename(session, real_oldpath, real_newpath);
3337         if (ok != MAILIMAP_NO_ERROR) {
3338                 log_warning(LOG_PROTOCOL, _("can't rename mailbox: %s to %s\n"),
3339                             real_oldpath, real_newpath);
3340                 g_free(real_oldpath);
3341                 g_free(newpath);
3342                 g_free(real_newpath);
3343                 return -1;
3344         }
3345         g_free(item->name);
3346         item->name = g_strdup(name);
3347
3348         old_cache_dir = folder_item_get_path(item);
3349
3350         paths[0] = g_strdup(item->path);
3351         paths[1] = newpath;
3352         g_node_traverse(item->node, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
3353                         imap_rename_folder_func, paths);
3354
3355         if (is_dir_exist(old_cache_dir)) {
3356                 new_cache_dir = folder_item_get_path(item);
3357                 if (g_rename(old_cache_dir, new_cache_dir) < 0) {
3358                         FILE_OP_ERROR(old_cache_dir, "rename");
3359                 }
3360                 g_free(new_cache_dir);
3361         }
3362
3363         g_free(old_cache_dir);
3364         g_free(paths[0]);
3365         g_free(newpath);
3366         g_free(real_oldpath);
3367         g_free(real_newpath);
3368         return 0;
3369 }
3370
3371 gint imap_subscribe(Folder *folder, FolderItem *item, gchar *rpath, gboolean sub)
3372 {
3373         gchar *path;
3374         gint r = MAILIMAP_NO_ERROR;
3375         IMAPSession *session;
3376         debug_print("getting session...\n");
3377
3378         session = imap_session_get(folder);
3379         if (!session) {
3380                 return -1;
3381         }
3382         if (item && item->path) {
3383                 path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &r);
3384                 if (!path)
3385                         return -1;
3386                 if (is_fatal(r)) {
3387                         g_free(path);
3388                         return -1;
3389                 }
3390                 if (!strcasecmp(path, "INBOX") && sub == FALSE) {
3391                         g_free(path);
3392                         return -1;
3393                 }
3394                 debug_print("%ssubscribing %s\n", sub?"":"un", path);
3395                 r = imap_threaded_subscribe(folder, path, sub);
3396                 g_free(path);
3397         } else if (rpath) {
3398                 r = imap_threaded_subscribe(folder, rpath, sub);
3399         } else
3400                 return -1;
3401         return r;
3402 }
3403
3404 static gint imap_remove_folder_real(Folder *folder, FolderItem *item)
3405 {
3406         gint ok = MAILIMAP_NO_ERROR;
3407         IMAPSession *session;
3408         gchar *path;
3409         gchar *cache_dir;
3410         gboolean selected_folder;
3411
3412         g_return_val_if_fail(folder != NULL, -1);
3413         g_return_val_if_fail(item != NULL, -1);
3414         g_return_val_if_fail(item->path != NULL, -1);
3415
3416         debug_print("getting session...\n");
3417         session = imap_session_get(folder);
3418         if (!session) {
3419                 return -1;
3420         }
3421         path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &ok);
3422         if (is_fatal(ok)) {
3423                 g_free(path);
3424                 return -1;
3425         }
3426         imap_threaded_subscribe(folder, path, FALSE);
3427
3428         selected_folder = (session->mbox != NULL) &&
3429                           (!strcmp(session->mbox, item->path));
3430         if (selected_folder) {
3431                 ok = imap_cmd_close(session);
3432                 if (ok != MAILIMAP_NO_ERROR) {
3433                         debug_print("close err %d\n", ok);
3434                         return ok;
3435                 }
3436         }
3437         ok = imap_cmd_delete(session, path);
3438         if (ok != MAILIMAP_NO_ERROR && !is_fatal(ok)) {
3439                 gchar *tmp = NULL;
3440
3441                 ok = MAILIMAP_NO_ERROR;
3442                 tmp = g_strdup_printf("%s%c", path,
3443                                 imap_get_path_separator(session, IMAP_FOLDER(folder), path, &ok));
3444                 g_free(path);
3445                 path = tmp;
3446                 if (!is_fatal(ok))
3447                         ok = imap_cmd_delete(session, path);
3448         }
3449
3450         if (ok != MAILIMAP_NO_ERROR) {
3451                 log_warning(LOG_PROTOCOL, _("can't delete mailbox\n"));
3452                 g_free(path);
3453                 return -1;
3454         }
3455
3456         g_free(path);
3457         cache_dir = folder_item_get_path(item);
3458         if (is_dir_exist(cache_dir) && remove_dir_recursive(cache_dir) < 0)
3459                 g_warning("can't remove directory '%s'", cache_dir);
3460         g_free(cache_dir);
3461         folder_item_remove(item);
3462         return 0;
3463 }
3464
3465 static gint imap_remove_folder(Folder *folder, FolderItem *item)
3466 {
3467         GNode *node, *next;
3468
3469         g_return_val_if_fail(item != NULL, -1);
3470         g_return_val_if_fail(item->folder != NULL, -1);
3471         g_return_val_if_fail(item->node != NULL, -1);
3472
3473         node = item->node->children;
3474         while (node != NULL) {
3475                 next = node->next;
3476                 if (imap_remove_folder(folder, FOLDER_ITEM(node->data)) < 0)
3477                         return -1;
3478                 node = next;
3479         }
3480         debug_print("IMAP removing %s\n", item->path);
3481
3482         if (imap_remove_all_msg(folder, item) < 0)
3483                 return -1;
3484         return imap_remove_folder_real(folder, item);
3485 }
3486
3487 typedef struct _uncached_data {
3488         IMAPSession *session;
3489         FolderItem *item;
3490         MsgNumberList *numlist;
3491         guint cur;
3492         guint total;
3493         gboolean done;
3494         int ok;
3495 } uncached_data;
3496
3497 static void *imap_get_uncached_messages_thread(void *data)
3498 {
3499         uncached_data *stuff = (uncached_data *)data;
3500         IMAPSession *session = stuff->session;
3501         FolderItem *item = stuff->item;
3502         MsgNumberList *numlist = stuff->numlist;
3503         GSList *newlist = NULL;
3504         GSList *llast = NULL;
3505         GSList *seq_list, *cur;
3506         gboolean got_alien_tags = FALSE;
3507
3508         debug_print("uncached_messages\n");
3509
3510         if (session == NULL || item == NULL || item->folder == NULL
3511             || FOLDER_CLASS(item->folder) != &imap_class) {
3512                 stuff->done = TRUE;
3513                 return NULL;
3514         }
3515
3516         seq_list = imap_get_lep_set_from_numlist(IMAP_FOLDER(item->folder), numlist);
3517         debug_print("get msgs info\n");
3518         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
3519                 struct mailimap_set * imapset;
3520                 unsigned int i;
3521                 int r;
3522                 carray * env_list;
3523                 int count;
3524
3525                 if (session->cancelled)
3526                         break;
3527
3528                 imapset = cur->data;
3529
3530                 r = imap_threaded_fetch_env(session->folder,
3531                                             imapset, &env_list);
3532                 if (r != MAILIMAP_NO_ERROR) {
3533                         imap_handle_error(SESSION(session), NULL, r);
3534                         if (is_fatal(r)) {
3535                                 stuff->ok = r;
3536                                 return NULL;
3537                         }
3538                         continue;
3539                 }
3540
3541                 session_set_access_time(SESSION(session));
3542
3543                 count = 0;
3544                 for(i = 0 ; i < carray_count(env_list) ; i += 2) {
3545                         struct imap_fetch_env_info * info;
3546                         MsgInfo * msginfo;
3547                         GSList *tags = NULL, *cur = NULL;
3548                         info = carray_get(env_list, i);
3549                         tags = carray_get(env_list, i+1);
3550                         msginfo = imap_envelope_from_lep(info, item);
3551                         if (msginfo == NULL) {
3552                                 slist_free_strings_full(tags);
3553                                 continue;
3554                         }
3555                         g_slist_free(msginfo->tags);
3556                         msginfo->tags = NULL;
3557
3558                         for (cur = tags; cur; cur = cur->next) {
3559                                 gchar *real_tag = imap_modified_utf7_to_utf8(cur->data, TRUE);
3560                                 gint id = 0;
3561                                 id = tags_get_id_for_str(real_tag);
3562                                 if (id == -1) {
3563                                         id = tags_add_tag(real_tag);
3564                                         got_alien_tags = TRUE;
3565                                 }
3566                                 if (!g_slist_find(msginfo->tags, GINT_TO_POINTER(id))) {
3567                                         msginfo->tags = g_slist_prepend(
3568                                                         msginfo->tags,
3569                                                         GINT_TO_POINTER(id));
3570                                 }
3571                                 g_free(real_tag);
3572                         }
3573                         if (msginfo->tags)
3574                                 msginfo->tags = g_slist_reverse(msginfo->tags);
3575                         slist_free_strings_full(tags);
3576                         msginfo->folder = item;
3577                         if (!newlist)
3578                                 llast = newlist = g_slist_append(newlist, msginfo);
3579                         else {
3580                                 llast = g_slist_append(llast, msginfo);
3581                                 llast = llast->next;
3582                         }
3583                         count ++;
3584                 }
3585
3586                 imap_fetch_env_free(env_list);
3587         }
3588
3589         if (got_alien_tags) {
3590                 tags_write_tags();
3591                 main_window_reflect_tags_changes(mainwindow_get_mainwindow());
3592         }
3593
3594         imap_lep_set_free(seq_list);
3595
3596         session_set_access_time(SESSION(session));
3597         stuff->done = TRUE;
3598         return newlist;
3599 }
3600
3601 #define MAX_MSG_NUM 50
3602
3603 static GSList *imap_get_uncached_messages(IMAPSession *session,
3604                                         FolderItem *item,
3605                                         MsgNumberList *numlist,
3606                                         int *r)
3607 {
3608         GSList *result = NULL;
3609         GSList * cur;
3610         uncached_data *data = g_new0(uncached_data, 1);
3611
3612         cur = numlist;
3613         data->total = g_slist_length(numlist);
3614         data->ok = MAILIMAP_NO_ERROR;
3615         debug_print("messages list : %i\n", data->total);
3616
3617         while (cur != NULL) {
3618                 GSList * partial_result;
3619                 int count;
3620                 GSList * newlist;
3621                 GSList * llast;
3622
3623                 llast = NULL;
3624                 count = 0;
3625                 newlist = NULL;
3626                 while (count < MAX_MSG_NUM) {
3627                         void * p;
3628
3629                         p = cur->data;
3630
3631                         if (newlist == NULL)
3632                                 llast = newlist = g_slist_append(newlist, p);
3633                         else {
3634                                 llast = g_slist_append(llast, p);
3635                                 llast = llast->next;
3636                         }
3637                         count ++;
3638
3639                         cur = cur->next;
3640                         if (cur == NULL)
3641                                 break;
3642                 }
3643
3644                 data->done = FALSE;
3645                 data->session = session;
3646                 data->item = item;
3647                 data->numlist = newlist;
3648                 data->cur += count;
3649
3650                 if (prefs_common.work_offline &&
3651                     !inc_offline_should_override(FALSE,
3652                         _("Claws Mail needs network access in order "
3653                           "to access the IMAP server."))) {
3654                         g_free(data);
3655                         return NULL;
3656                 }
3657
3658                 partial_result =
3659                         (GSList *)imap_get_uncached_messages_thread(data);
3660                 *r = data->ok;
3661                 if (data->ok != MAILIMAP_NO_ERROR) {
3662                         goto bail;
3663                 }
3664                 statusbar_progress_all(data->cur,data->total, 1);
3665
3666                 g_slist_free(newlist);
3667
3668                 result = g_slist_concat(result, partial_result);
3669         }
3670 bail:
3671         g_free(data);
3672
3673         statusbar_progress_all(0,0,0);
3674         statusbar_pop_all();
3675
3676         return result;
3677 }
3678
3679 static void imap_delete_all_cached_messages(FolderItem *item)
3680 {
3681         gchar *dir;
3682
3683         g_return_if_fail(item != NULL);
3684         g_return_if_fail(item->folder != NULL);
3685         g_return_if_fail(FOLDER_CLASS(item->folder) == &imap_class);
3686
3687         debug_print("Deleting all cached messages...\n");
3688
3689         dir = folder_item_get_path(item);
3690         if (is_dir_exist(dir))
3691                 remove_all_numbered_files(dir);
3692         g_free(dir);
3693
3694         debug_print("done.\n");
3695 }
3696
3697 gchar imap_get_path_separator_for_item(FolderItem *item)
3698 {
3699         Folder *folder = NULL;
3700         IMAPFolder *imap_folder = NULL;
3701         IMAPSession *session = NULL;
3702         gchar result = '/';
3703         gint ok = MAILIMAP_NO_ERROR;
3704         if (!item)
3705                 return '/';
3706         folder = item->folder;
3707
3708         if (!folder)
3709                 return '/';
3710
3711         imap_folder = IMAP_FOLDER(folder);
3712
3713         debug_print("getting session...");
3714         session = imap_session_get(FOLDER(folder));
3715         result = imap_get_path_separator(session, imap_folder, item->path, &ok);
3716         return result;
3717 }
3718
3719 static gchar imap_refresh_path_separator(IMAPSession *session, IMAPFolder *folder, const gchar *subfolder, gint *ok)
3720 {
3721         clist * lep_list;
3722         int r;
3723         gchar separator = '\0';
3724
3725         g_return_val_if_fail(session != NULL, '/');
3726         r = imap_threaded_list((Folder *)folder, "", subfolder, &lep_list);
3727
3728         if (r != MAILIMAP_NO_ERROR) {
3729                 imap_handle_error(SESSION(session), NULL, r);
3730                 log_warning(LOG_PROTOCOL, _("LIST failed\n"));
3731                 *ok = r;
3732                 return '\0';
3733         }
3734
3735         if (lep_list != NULL && clist_count(lep_list) > 0) {
3736                 clistiter * iter = clist_begin(lep_list);
3737                 struct mailimap_mailbox_list * mb;
3738                 mb = clist_content(iter);
3739
3740                 separator = mb->mb_delimiter;
3741                 debug_print("got separator: %c\n", folder->last_seen_separator);
3742         }
3743         *ok = MAILIMAP_NO_ERROR;
3744         mailimap_list_result_free(lep_list);
3745         return separator;
3746 }
3747
3748 static gchar imap_get_path_separator(IMAPSession *session, IMAPFolder *folder, const gchar *path, gint *ok)
3749 {
3750         gchar separator = '/';
3751         *ok = MAILIMAP_NO_ERROR;
3752         if (folder->last_seen_separator == 0) {
3753                 folder->last_seen_separator = imap_refresh_path_separator(session, folder, "", ok);
3754         }
3755
3756         if (folder->last_seen_separator == 0) {
3757                 folder->last_seen_separator = imap_refresh_path_separator(session, folder, "INBOX", ok);
3758         }
3759
3760         if (folder->last_seen_separator != 0) {
3761                 debug_print("using separator: %c\n", folder->last_seen_separator);
3762                 return folder->last_seen_separator;
3763         }
3764
3765         return separator;
3766 }
3767
3768 static gchar *imap_get_real_path(IMAPSession *session, IMAPFolder *folder, const gchar *path, gint *ok)
3769 {
3770         gchar *real_path = NULL;
3771         gchar separator;
3772
3773         g_return_val_if_fail(folder != NULL, NULL);
3774         g_return_val_if_fail(path != NULL, NULL);
3775
3776         *ok = MAILIMAP_NO_ERROR;
3777
3778         real_path = imap_utf8_to_modified_utf7(path, FALSE);
3779         separator = imap_get_path_separator(session, folder, path, ok);
3780         if (*ok == MAILIMAP_NO_ERROR)
3781                 imap_path_separator_subst(real_path, separator);
3782
3783         return real_path;
3784 }
3785
3786 static gint imap_set_message_flags(IMAPSession *session,
3787                                    IMAPFolderItem *item,
3788                                    MsgNumberList *numlist,
3789                                    IMAPFlags flags,
3790                                    GSList *tags,
3791                                    gboolean is_set)
3792 {
3793         gint ok = 0;
3794         GSList *seq_list;
3795         GSList * cur;
3796         gint total = 0;
3797         IMAPFolder *folder = NULL;
3798         GSList *sorted_list = NULL;
3799
3800         if (numlist == NULL || session == NULL)
3801                 return MAILIMAP_ERROR_BAD_STATE;
3802
3803         folder = IMAP_FOLDER(session->folder);
3804
3805         sorted_list = g_slist_copy(numlist);
3806         sorted_list = g_slist_sort(sorted_list, g_int_compare);
3807
3808         cur = g_slist_last(sorted_list);
3809
3810         if (cur)
3811                 total = GPOINTER_TO_INT(cur->data);
3812
3813         seq_list = imap_get_lep_set_from_numlist(IMAP_FOLDER(session->folder), sorted_list);
3814
3815         statusbar_print_all(_("Flagging messages..."));
3816
3817         for(cur = seq_list ; cur != NULL ; cur = g_slist_next(cur)) {
3818                 struct mailimap_set * imapset = (struct mailimap_set *)cur->data;
3819                 struct mailimap_set_item *set_item = NULL;
3820
3821                 if (imapset->set_list)
3822                         set_item = clist_content(clist_begin(imapset->set_list));
3823                 else
3824                         continue;
3825
3826                 if (set_item == NULL)
3827                         continue;
3828
3829                 statusbar_progress_all(set_item->set_first, total, 1);
3830
3831                 ok = imap_cmd_store(session, item, imapset,
3832                                     flags, tags, is_set);
3833                 statusbar_progress_all(set_item->set_last, total, 1);
3834                 if (ok != MAILIMAP_NO_ERROR && folder->max_set_size > 20) {
3835                         /* reduce max set size */
3836                         folder->max_set_size /= 2;
3837                 }
3838                 if (ok != MAILIMAP_NO_ERROR && is_fatal(ok)) {
3839                         break;
3840                 }
3841         }
3842
3843         g_slist_free(sorted_list);
3844
3845         statusbar_progress_all(0,0,0);
3846         statusbar_pop_all();
3847
3848         imap_lep_set_free(seq_list);
3849
3850         return ok;
3851 }
3852
3853 typedef struct _select_data {
3854         IMAPSession *session;
3855         gchar *real_path;
3856         gint *exists;
3857         gint *recent;
3858         gint *unseen;
3859         guint32 *uid_validity;
3860         gboolean done;
3861 } select_data;
3862
3863 static gint imap_select(IMAPSession *session, IMAPFolder *folder,
3864                         FolderItem *item,
3865                         gint *exists, gint *recent, gint *unseen,
3866                         guint32 *uid_validity, gint *can_create_flags,
3867                         gboolean block)
3868 {
3869         gchar *real_path;
3870         gint ok = MAILIMAP_NO_ERROR;
3871         gint exists_, recent_, unseen_;
3872         guint32 uid_validity_;
3873         gint can_create_flags_;
3874         const gchar *path = item ? item->path:NULL;
3875
3876         if (!item) {
3877                 return MAILIMAP_ERROR_BAD_STATE;
3878         }
3879
3880         if (!exists && !recent && !unseen && !uid_validity && !can_create_flags) {
3881                 if (session->mbox && strcmp(session->mbox, path) == 0)
3882                         return MAILIMAP_NO_ERROR;
3883         }
3884         if (!exists && !recent && !unseen && !uid_validity && can_create_flags) {
3885                 if (session->mbox && strcmp(session->mbox, path) == 0) {
3886                         if (IMAP_FOLDER_ITEM(item)->can_create_flags != ITEM_CAN_CREATE_FLAGS_UNKNOWN)
3887                                 return MAILIMAP_NO_ERROR;
3888                 }
3889         }
3890         if (!exists)
3891                 exists = &exists_;
3892         if (!recent)
3893                 recent = &recent_;
3894         if (!unseen)
3895                 unseen = &unseen_;
3896         if (!uid_validity)
3897                 uid_validity = &uid_validity_;
3898         if (!can_create_flags)
3899                 can_create_flags = &can_create_flags_;
3900
3901         g_free(session->mbox);
3902         session->mbox = NULL;
3903         session->exists = 0;
3904         session->recent = 0;
3905         session->expunge = 0;
3906
3907         real_path = imap_get_real_path(session, folder, path, &ok);
3908         if (is_fatal(ok)) {
3909                 g_free(real_path);
3910                 return ok;
3911         }
3912         g_slist_free(IMAP_FOLDER_ITEM(item)->ok_flags);
3913         IMAP_FOLDER_ITEM(item)->ok_flags = NULL;
3914         ok = imap_cmd_select(session, real_path,
3915                              exists, recent, unseen, uid_validity, can_create_flags,
3916                              &(IMAP_FOLDER_ITEM(item)->ok_flags), block);
3917         if (ok != MAILIMAP_NO_ERROR) {
3918                 log_warning(LOG_PROTOCOL, _("can't select folder: %s\n"), real_path);
3919         } else {
3920                 session->mbox = g_strdup(path);
3921                 session->folder_content_changed = FALSE;
3922                 session->exists = *exists;
3923                 session->recent = *recent;
3924                 session->expunge = 0;
3925                 session->unseen = *unseen;
3926                 session->uid_validity = *uid_validity;
3927                 debug_print("select: exists %d recent %d expunge %d uid_validity %d can_create_flags %d\n",
3928                         session->exists, session->recent, session->expunge,
3929                         session->uid_validity, *can_create_flags);
3930         }
3931         if (*can_create_flags) {
3932                 IMAP_FOLDER_ITEM(item)->can_create_flags = ITEM_CAN_CREATE_FLAGS;
3933         } else {
3934                 IMAP_FOLDER_ITEM(item)->can_create_flags = ITEM_CANNOT_CREATE_FLAGS;
3935         }
3936         g_free(real_path);
3937
3938         return ok;
3939 }
3940
3941 static gint imap_status(IMAPSession *session, IMAPFolder *folder,
3942                         const gchar *path, IMAPFolderItem *item,
3943                         gint *messages,
3944                         guint32 *uid_next, guint32 *uid_validity,
3945                         gint *unseen, gboolean block)
3946 {
3947         int r = MAILIMAP_NO_ERROR;
3948         clistiter * iter;
3949         struct mailimap_mailbox_data_status * data_status;
3950         int got_values;
3951         gchar *real_path;
3952         guint mask = 0;
3953
3954         real_path = imap_get_real_path(session, folder, path, &r);
3955         if (is_fatal(r)) {
3956                 g_free(real_path);
3957                 return r;
3958         }
3959         if (messages) {
3960                 mask |= 1 << 0;
3961                 *messages = 0;
3962         }
3963         if (uid_next) {
3964                 mask |= 1 << 2;
3965                 *uid_next = 0;
3966         }
3967         if (uid_validity) {
3968                 mask |= 1 << 3;
3969                 *uid_validity = 0;
3970         }
3971         if (unseen) {
3972                 mask |= 1 << 4;
3973                 *unseen = 0;
3974         }
3975
3976         if (session->mbox != NULL &&
3977             !strcmp(session->mbox, item->item.path)) {
3978                 r = imap_cmd_close(session);
3979                 if (r != MAILIMAP_NO_ERROR) {
3980                         debug_print("close err %d\n", r);
3981                         g_free(real_path);
3982                         return r;
3983                 }
3984         }
3985
3986         r = imap_threaded_status(FOLDER(folder), real_path,
3987                 &data_status, mask);
3988
3989         g_free(real_path);
3990         if (r != MAILIMAP_NO_ERROR) {
3991                 imap_handle_error(SESSION(session), NULL, r);
3992                 debug_print("status err %d\n", r);
3993                 return r;
3994         }
3995
3996         if (data_status == NULL || data_status->st_info_list == NULL) {
3997                 debug_print("data_status %p\n", data_status);
3998                 if (data_status) {
3999                         debug_print("data_status->st_info_list %p\n", data_status->st_info_list);
4000                         mailimap_mailbox_data_status_free(data_status);
4001                 }
4002                 return MAILIMAP_ERROR_BAD_STATE;
4003         }
4004
4005         got_values = 0;
4006         if (data_status->st_info_list) {
4007                 for(iter = clist_begin(data_status->st_info_list) ; iter != NULL ;
4008                     iter = clist_next(iter)) {
4009                         struct mailimap_status_info * info;
4010
4011                         info = clist_content(iter);
4012                         switch (info->st_att) {
4013                         case MAILIMAP_STATUS_ATT_MESSAGES:
4014                                 if (messages) {
4015                                         * messages = info->st_value;
4016                                         got_values |= 1 << 0;
4017                                 }
4018                                 break;
4019
4020                         case MAILIMAP_STATUS_ATT_UIDNEXT:
4021                                 if (uid_next) {
4022                                         * uid_next = info->st_value;
4023                                         got_values |= 1 << 2;
4024                                 }
4025                                 break;
4026
4027                         case MAILIMAP_STATUS_ATT_UIDVALIDITY:
4028                                 if (uid_validity) {
4029                                         * uid_validity = info->st_value;
4030                                         got_values |= 1 << 3;
4031                                 }
4032                                 break;
4033
4034                         case MAILIMAP_STATUS_ATT_UNSEEN:
4035                                 if (unseen) {
4036                                         * unseen = info->st_value;
4037                                         got_values |= 1 << 4;
4038                                 }
4039                                 break;
4040                         }
4041                 }
4042         }
4043         mailimap_mailbox_data_status_free(data_status);
4044
4045         if (got_values != mask) {
4046                 g_warning("status: incomplete values received (%d)", got_values);
4047         }
4048         return MAILIMAP_NO_ERROR;
4049 }
4050
4051 static void imap_free_capabilities(IMAPSession *session)
4052 {
4053         slist_free_strings_full(session->capability);
4054         session->capability = NULL;
4055 }
4056
4057 /* low-level IMAP4rev1 commands */
4058
4059 static gint imap_cmd_login(IMAPSession *session,
4060                            const gchar *user, const gchar *pass,
4061                            const gchar *type)
4062 {
4063         int r;
4064         gint ok;
4065
4066         if (!strcmp(type, "LOGIN") && imap_has_capability(session, "LOGINDISABLED")) {
4067                 gint ok = MAILIMAP_ERROR_BAD_STATE;
4068                 if (imap_has_capability(session, "STARTTLS")) {
4069 #ifdef USE_GNUTLS
4070                         log_warning(LOG_PROTOCOL, _("Server requires TLS to log in.\n"));
4071                         ok = imap_cmd_starttls(session);
4072                         if (ok != MAILIMAP_NO_ERROR) {
4073                                 log_warning(LOG_PROTOCOL, _("Can't start TLS session.\n"));
4074                                 return ok;
4075                         } else {
4076                                 /* refresh capas */
4077                                 imap_free_capabilities(session);
4078                                 if ((r = imap_get_capabilities(session)) != MAILIMAP_NO_ERROR) {
4079                                         imap_handle_error(SESSION(session), NULL, r);
4080                                         log_warning(LOG_PROTOCOL, _("Can't refresh capabilities.\n"));
4081                                         return r;
4082                                 }
4083                         }
4084 #else
4085                         log_error(LOG_PROTOCOL, _("Connection to %s failed: "
4086                                         "server requires TLS, but Claws Mail "
4087                                         "has been compiled without TLS "
4088                                         "support.\n"),
4089                                         SESSION(session)->server);
4090                         return MAILIMAP_ERROR_LOGIN;
4091 #endif
4092                 } else {
4093                         log_error(LOG_PROTOCOL, _("Server logins are disabled.\n"));
4094                         return MAILIMAP_ERROR_LOGIN;
4095                 }
4096         }
4097
4098         log_print(LOG_PROTOCOL, "IMAP4> Logging %s to %s using %s\n",
4099                         user,
4100                         SESSION(session)->server,
4101                         type);
4102         r = imap_threaded_login(session->folder, user, pass, type);
4103         if (r != MAILIMAP_NO_ERROR) {
4104                 imap_handle_error(SESSION(session), NULL, r);
4105                 log_print(LOG_PROTOCOL, "IMAP4< Error logging in to %s\n",
4106                                 SESSION(session)->server);
4107                 ok = r;
4108         } else {
4109                 log_print(LOG_PROTOCOL, "IMAP4< Login to %s successful\n",
4110                                 SESSION(session)->server);
4111                 ok = MAILIMAP_NO_ERROR;
4112         }
4113         return ok;
4114 }
4115
4116 static gint imap_cmd_noop(IMAPSession *session)
4117 {
4118         int r;
4119         unsigned int exists, recent, expunge, unseen, uidnext, uidval;
4120
4121         r = imap_threaded_noop(session->folder, &exists, &recent, &expunge, &unseen, &uidnext, &uidval);
4122         if (r != MAILIMAP_NO_ERROR) {
4123                 imap_handle_error(SESSION(session), NULL, r);
4124                 debug_print("noop err %d\n", r);
4125                 return r;
4126         }
4127
4128         if ((exists && exists != session->exists)
4129          || (recent && recent != session->recent)
4130          || (expunge && expunge != session->expunge)
4131          || (unseen && unseen != session->unseen)) {
4132                 session->folder_content_changed = TRUE;
4133         }
4134         if (uidnext != 0 && uidnext != session->uid_next) {
4135                 session->uid_next = uidnext;
4136                 session->folder_content_changed = TRUE;
4137         }
4138         if (uidval != 0 && uidval != session->uid_validity) {
4139                 session->uid_validity = uidval;
4140                 session->folder_content_changed = TRUE;
4141         }
4142
4143         session->exists = exists;
4144         session->recent = recent;
4145         session->expunge = expunge;
4146         session->unseen = unseen;
4147
4148         session_set_access_time(SESSION(session));
4149
4150         return MAILIMAP_NO_ERROR;
4151 }
4152
4153 #ifdef USE_GNUTLS
4154 static gint imap_cmd_starttls(IMAPSession *session)
4155 {
4156         int r;
4157
4158         r = imap_threaded_starttls(session->folder,
4159                 SESSION(session)->server, SESSION(session)->port);
4160         if (r != MAILIMAP_NO_ERROR) {
4161                 imap_handle_error(SESSION(session), NULL, r);
4162                 debug_print("starttls err %d\n", r);
4163                 return r;
4164         }
4165         return MAILIMAP_NO_ERROR;
4166 }
4167 #endif
4168
4169 static gint imap_cmd_select(IMAPSession *session, const gchar *folder,
4170                             gint *exists, gint *recent, gint *unseen,
4171                             guint32 *uid_validity, gint *can_create_flags,
4172                             GSList **ok_flags, gboolean block)
4173 {
4174         int r;
4175
4176         r = imap_threaded_select(session->folder, folder,
4177                                  exists, recent, unseen, uid_validity, can_create_flags, ok_flags);
4178         if (r != MAILIMAP_NO_ERROR) {
4179                 imap_handle_error(SESSION(session), NULL, r);
4180                 debug_print("select err %d\n", r);
4181                 return r;
4182         }
4183         return MAILIMAP_NO_ERROR;
4184 }
4185
4186 static gint imap_cmd_close(IMAPSession *session)
4187 {
4188         int r;
4189
4190         r = imap_threaded_close(session->folder);
4191         if (r != MAILIMAP_NO_ERROR) {
4192                 imap_handle_error(SESSION(session), NULL, r);
4193                 debug_print("close err %d\n", r);
4194                 return r;
4195         }
4196         g_free(session->mbox);
4197         session->mbox = NULL;
4198         session->exists = 0;
4199         session->recent = 0;
4200         session->expunge = 0;
4201         return MAILIMAP_NO_ERROR;
4202 }
4203
4204 static gint imap_cmd_examine(IMAPSession *session, const gchar *folder,
4205                              gint *exists, gint *recent, gint *unseen,
4206                              guint32 *uid_validity, gboolean block)
4207 {
4208         int r;
4209
4210         r = imap_threaded_examine(session->folder, folder,
4211                                   exists, recent, unseen, uid_validity);
4212         if (r != MAILIMAP_NO_ERROR) {
4213                 imap_handle_error(SESSION(session), NULL, r);
4214                 debug_print("examine err %d\n", r);
4215
4216                 return r;
4217         }
4218         return MAILIMAP_NO_ERROR;
4219 }
4220
4221 static gint imap_cmd_create(IMAPSession *session, const gchar *folder)
4222 {
4223         int r;
4224
4225         r = imap_threaded_create(session->folder, folder);
4226         if (r != MAILIMAP_NO_ERROR) {
4227                 imap_handle_error(SESSION(session), NULL, r);
4228                 return r;
4229         }
4230
4231         return MAILIMAP_NO_ERROR;
4232 }
4233
4234 static gint imap_cmd_rename(IMAPSession *session, const gchar *old_folder,
4235                             const gchar *new_folder)
4236 {
4237         int r;
4238
4239         r = imap_threaded_rename(session->folder, old_folder,
4240                                  new_folder);
4241         if (r != MAILIMAP_NO_ERROR) {
4242                 imap_handle_error(SESSION(session), NULL, r);
4243                 return r;
4244         }
4245
4246         return MAILIMAP_NO_ERROR;
4247 }
4248
4249 static gint imap_cmd_delete(IMAPSession *session, const gchar *folder)
4250 {
4251         int r;
4252
4253
4254         r = imap_threaded_delete(session->folder, folder);
4255         if (r != MAILIMAP_NO_ERROR) {
4256                 imap_handle_error(SESSION(session), NULL, r);
4257                 return r;
4258         }
4259
4260         return MAILIMAP_NO_ERROR;
4261 }
4262
4263 typedef struct _fetch_data {
4264         IMAPSession *session;
4265         guint32 uid;
4266         const gchar *filename;
4267         gboolean headers;
4268         gboolean body;
4269         gboolean done;
4270 } fetch_data;
4271
4272 static void *imap_cmd_fetch_thread(void *data)
4273 {
4274         fetch_data *stuff = (fetch_data *)data;
4275         IMAPSession *session = stuff->session;
4276         guint32 uid = stuff->uid;
4277         const gchar *filename = stuff->filename;
4278         int r;
4279
4280         if (stuff->body) {
4281                 r = imap_threaded_fetch_content(session->folder,
4282                                                uid, 1, filename);
4283         }
4284         else {
4285                 r = imap_threaded_fetch_content(session->folder,
4286                                                 uid, 0, filename);
4287         }
4288         if (r != MAILIMAP_NO_ERROR) {
4289                 imap_handle_error(SESSION(session), NULL, r);
4290                 debug_print("fetch err %d\n", r);
4291                 return GINT_TO_POINTER(r);
4292         }
4293         return GINT_TO_POINTER(MAILIMAP_NO_ERROR);
4294 }
4295
4296 static gint imap_cmd_fetch(IMAPSession *session, guint32 uid,
4297                                 const gchar *filename, gboolean headers,
4298                                 gboolean body)
4299 {
4300         fetch_data *data = g_new0(fetch_data, 1);
4301         int result = 0;
4302         data->done = FALSE;
4303         data->session = session;
4304         data->uid = uid;
4305         data->filename = filename;
4306         data->headers = headers;
4307         data->body = body;
4308
4309         if (prefs_common.work_offline &&
4310             !inc_offline_should_override(FALSE,
4311                 _("Claws Mail needs network access in order "
4312                   "to access the IMAP server."))) {
4313                 g_free(data);
4314                 return -1;
4315         }
4316         statusbar_print_all(_("Fetching message..."));
4317         result = GPOINTER_TO_INT(imap_cmd_fetch_thread(data));
4318         statusbar_pop_all();
4319         g_free(data);
4320         return result;
4321 }
4322
4323
4324 static gint imap_cmd_append(IMAPSession *session,
4325                             IMAPFolderItem *item,
4326                             const gchar *destfolder,
4327                             const gchar *file, IMAPFlags flags,
4328                             guint32 *new_uid)
4329 {
4330         struct mailimap_flag_list * flag_list;
4331         int r;
4332
4333         cm_return_val_if_fail(file != NULL, MAILIMAP_ERROR_BAD_STATE);
4334
4335         flag_list = imap_flag_to_lep(item, flags, NULL);
4336         lock_session(session);
4337         r = imap_threaded_append(session->folder, destfolder,
4338                          file, flag_list, (int *)new_uid);
4339         mailimap_flag_list_free(flag_list);
4340
4341         if (r != MAILIMAP_NO_ERROR) {
4342                 imap_handle_error(SESSION(session), NULL, r);
4343                 debug_print("append err %d\n", r);
4344                 return r;
4345         }
4346
4347         unlock_session(session);
4348
4349         return MAILIMAP_NO_ERROR;
4350 }
4351
4352 static gint imap_cmd_copy(IMAPSession *session, struct mailimap_set * set,
4353                           const gchar *destfolder,
4354                           struct mailimap_set **source, struct mailimap_set **dest)
4355 {
4356         int r;
4357
4358         g_return_val_if_fail(session != NULL, MAILIMAP_ERROR_BAD_STATE);
4359         g_return_val_if_fail(set != NULL, MAILIMAP_ERROR_BAD_STATE);
4360         g_return_val_if_fail(destfolder != NULL, MAILIMAP_ERROR_BAD_STATE);
4361
4362         r = imap_threaded_copy(session->folder, set, destfolder, source, dest);
4363         if (r != MAILIMAP_NO_ERROR) {
4364                 imap_handle_error(SESSION(session), NULL, r);
4365                 return r;
4366         }
4367
4368         return MAILIMAP_NO_ERROR;
4369 }
4370
4371 static gint imap_cmd_store(IMAPSession *session,
4372                            IMAPFolderItem *item,
4373                            struct mailimap_set * set,
4374                            IMAPFlags flags, GSList *tags, int do_add)
4375 {
4376         int r;
4377         struct mailimap_flag_list * flag_list = NULL;
4378         struct mailimap_store_att_flags * store_att_flags;
4379
4380         flag_list = imap_flag_to_lep(item, flags, tags);
4381
4382         if (do_add)
4383                 store_att_flags =
4384                         mailimap_store_att_flags_new_add_flags_silent(flag_list);
4385         else
4386                 store_att_flags =
4387                         mailimap_store_att_flags_new_remove_flags_silent(flag_list);
4388
4389         r = imap_threaded_store(session->folder, set, store_att_flags);
4390         mailimap_store_att_flags_free(store_att_flags);
4391         if (r != MAILIMAP_NO_ERROR) {
4392                 imap_handle_error(SESSION(session), NULL, r);
4393                 return r;
4394         }
4395
4396         return MAILIMAP_NO_ERROR;
4397 }
4398
4399 static gint imap_cmd_expunge(IMAPSession *session, gboolean do_expunge)
4400 {
4401         int r;
4402
4403         if (!do_expunge)
4404                 return MAILIMAP_NO_ERROR;
4405
4406         if (prefs_common.work_offline &&
4407             !inc_offline_should_override(FALSE,
4408                 _("Claws Mail needs network access in order "
4409                   "to access the IMAP server."))) {
4410                 return -1;
4411         }
4412
4413         r = imap_threaded_expunge(session->folder);
4414         if (r != MAILIMAP_NO_ERROR) {
4415                 imap_handle_error(SESSION(session), NULL, r);
4416                 return r;
4417         }
4418
4419         return MAILIMAP_NO_ERROR;
4420 }
4421
4422 gint imap_expunge(Folder *folder, FolderItem *item)
4423 {
4424         IMAPSession *session = imap_session_get(folder);
4425         if (session == NULL)
4426                 return -1;
4427
4428         return imap_cmd_expunge(session, TRUE);
4429 }
4430
4431 static void imap_path_separator_subst(gchar *str, gchar separator)
4432 {
4433         gchar *p;
4434         gboolean in_escape = FALSE;
4435
4436         if (!separator || separator == '/') return;
4437
4438         for (p = str; *p != '\0'; p++) {
4439                 if (*p == '/' && !in_escape)
4440                         *p = separator;
4441                 else if (*p == '&' && *(p + 1) != '-' && !in_escape)
4442                         in_escape = TRUE;
4443                 else if (*p == '-' && in_escape)
4444                         in_escape = FALSE;
4445         }
4446 }
4447
4448 static gboolean imap_rename_folder_func(GNode *node, gpointer data)
4449 {
4450         FolderItem *item = node->data;
4451         gchar **paths = data;
4452         const gchar *oldpath = paths[0];
4453         const gchar *newpath = paths[1];
4454         gchar *real_oldpath, *real_newpath;
4455         gchar *base;
4456         gchar *new_itempath;
4457         gint oldpathlen;
4458         IMAPSession *session = imap_session_get(item->folder);
4459         gint ok = MAILIMAP_NO_ERROR;
4460         oldpathlen = strlen(oldpath);
4461         if (strncmp(oldpath, item->path, oldpathlen) != 0) {
4462                 g_warning("path doesn't match: %s, %s", oldpath, item->path);
4463                 return TRUE;
4464         }
4465
4466         base = item->path + oldpathlen;
4467         while (*base == G_DIR_SEPARATOR) base++;
4468         if (*base == '\0')
4469                 new_itempath = g_strdup(newpath);
4470         else
4471                 new_itempath = g_strconcat(newpath, G_DIR_SEPARATOR_S, base,
4472                                            NULL);
4473
4474         real_oldpath = imap_get_real_path(session, IMAP_FOLDER(item->folder), item->path, &ok);
4475         g_free(item->path);
4476         item->path = new_itempath;
4477
4478         real_newpath = imap_get_real_path(session, IMAP_FOLDER(item->folder), item->path, &ok);
4479
4480         imap_threaded_subscribe(item->folder, real_oldpath, FALSE);
4481         imap_threaded_subscribe(item->folder, real_newpath, TRUE);
4482
4483         g_free(real_oldpath);
4484         g_free(real_newpath);
4485         return FALSE;
4486 }
4487
4488 static gint get_list_of_uids(IMAPSession *session, Folder *folder, IMAPFolderItem *item, GSList **msgnum_list)
4489 {
4490         GSList *uidlist, *elem;
4491         int r = -1;
4492         clist * lep_uidlist;
4493         gint ok, nummsgs = 0;
4494
4495         if (session == NULL) {
4496                 return -1;
4497         }
4498
4499         ok = imap_select(session, IMAP_FOLDER(folder), FOLDER_ITEM(item),
4500                          NULL, NULL, NULL, NULL, NULL, TRUE);
4501         if (ok != MAILIMAP_NO_ERROR) {
4502                 return -1;
4503         }
4504
4505         g_slist_free(item->uid_list);
4506         item->uid_list = NULL;
4507
4508         uidlist = NULL;
4509
4510         if (folder->account && folder->account->low_bandwidth) {
4511                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SIMPLE,
4512                                 NULL, NULL, NULL, &lep_uidlist);
4513         }
4514
4515         if (r == MAILIMAP_NO_ERROR) {
4516                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
4517                 mailimap_search_result_free(lep_uidlist);
4518         } else {
4519                 carray * lep_uidtab;
4520                 if (r != -1) { /* inited */
4521                         imap_handle_error(SESSION(session), NULL, r);
4522                         if (is_fatal(r))
4523                                 return -1;
4524                 }
4525                 r = imap_threaded_fetch_uid(folder, 1,
4526                                     &lep_uidtab);
4527                 if (r == MAILIMAP_NO_ERROR) {
4528                         uidlist = imap_uid_list_from_lep_tab(lep_uidtab);
4529                         imap_fetch_uid_list_free(lep_uidtab);
4530                 }
4531         }
4532
4533         if (r != MAILIMAP_NO_ERROR) {
4534                 imap_handle_error(SESSION(session), NULL, r);
4535                 return -1;
4536         }
4537
4538         for (elem = uidlist; elem != NULL; elem = g_slist_next(elem)) {
4539                 guint msgnum;
4540
4541                 msgnum = GPOINTER_TO_INT(elem->data);
4542
4543                 *msgnum_list = g_slist_prepend(*msgnum_list, GINT_TO_POINTER(msgnum));
4544                 item->uid_list = g_slist_prepend(item->uid_list, GINT_TO_POINTER(msgnum));
4545                 nummsgs++;
4546         }
4547         g_slist_free(uidlist);
4548
4549         return nummsgs;
4550
4551 }
4552
4553 gint imap_get_num_list(Folder *folder, FolderItem *_item, GSList **msgnum_list, gboolean *old_uids_valid)
4554 {
4555         IMAPFolderItem *item = (IMAPFolderItem *)_item;
4556         IMAPSession *session;
4557         gint nummsgs;
4558         GSList *uidlist = NULL;
4559         gchar *dir;
4560         gint known_list_len = 0;
4561         gchar *path;
4562
4563         debug_print("get_num_list\n");
4564
4565         g_return_val_if_fail(folder != NULL, -1);
4566         g_return_val_if_fail(item != NULL, -1);
4567         g_return_val_if_fail(item->item.path != NULL, -1);
4568         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
4569         g_return_val_if_fail(folder->account != NULL, -1);
4570
4571         known_list_len = g_slist_length(item->uid_list);
4572         if (!item->should_update) {
4573                 debug_print("get_num_list: nothing to update\n");
4574                 *old_uids_valid = TRUE;
4575                 if (known_list_len == item->item.total_msgs
4576                  && known_list_len > 0) {
4577                         *msgnum_list = g_slist_copy(item->uid_list);
4578                         return known_list_len;
4579                 } else {
4580                         debug_print("don't know the list length...\n");
4581                 }
4582         }
4583
4584         if (prefs_common.work_offline &&
4585             !inc_offline_should_override(FALSE,
4586                 _("Claws Mail needs network access in order "
4587                   "to access the IMAP server."))) {
4588                 return -1;
4589         }
4590
4591         path = folder_item_get_path(_item);
4592         if (!is_dir_exist(path)) {
4593                 if(is_file_exist(path))
4594                         claws_unlink(path);
4595                 make_dir_hier(path);
4596         }
4597         g_free(path);
4598
4599         debug_print("getting session...\n");
4600         session = imap_session_get(folder);
4601         g_return_val_if_fail(session != NULL, -1);
4602
4603         lock_session(session);
4604         if (FOLDER_ITEM(item)->path)
4605                 statusbar_print_all(_("Scanning folder %s%c%s..."),
4606                                       FOLDER_ITEM(item)->folder->name,
4607                                       G_DIR_SEPARATOR,
4608                                       FOLDER_ITEM(item)->path);
4609         else
4610                 statusbar_print_all(_("Scanning folder %s..."),
4611                                       FOLDER_ITEM(item)->folder->name);
4612
4613         if (item->should_trash_cache) {
4614                 *old_uids_valid = FALSE;
4615                 debug_print("get_num_list: trashing num list\n");
4616                 debug_print("Freeing imap uid cache\n");
4617                 item->lastuid = 0;
4618                 g_slist_free(item->uid_list);
4619                 item->uid_list = NULL;
4620
4621                 imap_delete_all_cached_messages((FolderItem *)item);
4622         } else {
4623                 debug_print("get_num_list: updating num list\n");
4624                 *old_uids_valid = TRUE;
4625         }
4626
4627         nummsgs = get_list_of_uids(session, folder, item, &uidlist);
4628
4629         unlock_session(session);
4630
4631         /* session could be broken now, in case of fatal error */
4632
4633         debug_print("get_num_list: got %d msgs\n", nummsgs);
4634
4635         if (nummsgs < 0) {
4636                 statusbar_pop_all();
4637                 return -1;
4638         }
4639
4640         *msgnum_list = uidlist;
4641
4642         dir = folder_item_get_path((FolderItem *)item);
4643         debug_print("removing old messages from %s\n", dir);
4644         remove_numbered_files_not_in_list(dir, *msgnum_list);
4645         g_free(dir);
4646
4647         debug_print("get_num_list - ok - %i\n", nummsgs);
4648         statusbar_pop_all();
4649         item->should_trash_cache = FALSE;
4650         item->should_update = FALSE;
4651         return nummsgs;
4652 }
4653
4654 static MsgInfo *imap_parse_msg(const gchar *file, FolderItem *item)
4655 {
4656         MsgInfo *msginfo;
4657         MsgFlags flags;
4658
4659         flags.perm_flags = MSG_NEW|MSG_UNREAD;
4660         flags.tmp_flags = 0;
4661
4662         g_return_val_if_fail(item != NULL, NULL);
4663         g_return_val_if_fail(file != NULL, NULL);
4664
4665         if (folder_has_parent_of_type(item, F_QUEUE)) {
4666                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
4667         } else if (folder_has_parent_of_type(item, F_DRAFT)) {
4668                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
4669         }
4670
4671         msginfo = procheader_parse_file(file, flags, FALSE, FALSE);
4672         if (!msginfo) return NULL;
4673
4674         msginfo->plaintext_file = g_strdup(file);
4675         msginfo->folder = item;
4676
4677         return msginfo;
4678 }
4679
4680 GSList *imap_get_msginfos(Folder *folder, FolderItem *item,
4681                           GSList *msgnum_list)
4682 {
4683         IMAPSession *session;
4684         MsgInfoList *ret = NULL;
4685         gint ok;
4686
4687         debug_print("get_msginfos\n");
4688
4689         g_return_val_if_fail(folder != NULL, NULL);
4690         g_return_val_if_fail(item != NULL, NULL);
4691         g_return_val_if_fail(msgnum_list != NULL, NULL);
4692
4693         debug_print("getting session...\n");
4694         session = imap_session_get(folder);
4695         g_return_val_if_fail(session != NULL, NULL);
4696
4697         lock_session(session); /* unlocked later in the function */
4698
4699         debug_print("IMAP getting msginfos\n");
4700         ok = imap_select(session, IMAP_FOLDER(folder), item,
4701                          NULL, NULL, NULL, NULL, NULL, FALSE);
4702         if (ok != MAILIMAP_NO_ERROR) {
4703                 return NULL;
4704         }
4705         if (!(folder_has_parent_of_type(item, F_DRAFT) ||
4706               folder_has_parent_of_type(item, F_QUEUE))) {
4707                 ret = g_slist_concat(ret,
4708                         imap_get_uncached_messages(session, item,
4709                                                    msgnum_list, &ok));
4710                 if (ok != MAILIMAP_NO_ERROR)
4711                         return NULL;
4712                 unlock_session(session);
4713         } else {
4714                 MsgNumberList *sorted_list, *elem, *llast = NULL;
4715                 gint startnum, lastnum;
4716
4717                 unlock_session(session);
4718
4719                 sorted_list = g_slist_sort(g_slist_copy(msgnum_list), g_int_compare);
4720
4721                 startnum = lastnum = GPOINTER_TO_INT(sorted_list->data);
4722
4723                 llast = g_slist_last(ret);
4724                 for (elem = sorted_list;; elem = g_slist_next(elem)) {
4725                         guint num = 0;
4726
4727                         if (elem)
4728                                 num = GPOINTER_TO_INT(elem->data);
4729
4730                         if (num > lastnum + 1 || elem == NULL) {
4731                                 int i;
4732                                 for (i = startnum; i <= lastnum; ++i) {
4733                                         gchar *file;
4734                                         file = imap_fetch_msg(folder, item, i);
4735                                         if (file != NULL) {
4736                                                 MsgInfo *msginfo = imap_parse_msg(file, item);
4737                                                 if (msginfo != NULL) {
4738                                                         msginfo->msgnum = i;
4739                                                         if (llast == NULL)
4740                                                                 llast = ret = g_slist_append(ret, msginfo);
4741                                                         else {
4742                                                                 llast = g_slist_append(llast, msginfo);
4743                                                                 llast = llast->next;
4744                                                         }
4745                                                 }
4746                                                 g_free(file);
4747                                         }
4748                                 }
4749
4750                                 if (elem == NULL)
4751                                         break;
4752
4753                                 startnum = num;
4754                         }
4755                         lastnum = num;
4756                 }
4757
4758                 g_slist_free(sorted_list);
4759         }
4760         return ret;
4761 }
4762
4763 MsgInfo *imap_get_msginfo(Folder *folder, FolderItem *item, gint uid)
4764 {
4765         MsgInfo *msginfo = NULL;
4766         MsgInfoList *msginfolist;
4767         MsgNumberList numlist;
4768
4769         numlist.next = NULL;
4770         numlist.data = GINT_TO_POINTER(uid);
4771
4772         msginfolist = imap_get_msginfos(folder, item, &numlist);
4773         if (msginfolist != NULL) {
4774                 msginfo = msginfolist->data;
4775                 g_slist_free(msginfolist);
4776         }
4777
4778         return msginfo;
4779 }
4780
4781 gboolean imap_scan_required(Folder *folder, FolderItem *_item)
4782 {
4783         IMAPSession *session;
4784         IMAPFolderItem *item = (IMAPFolderItem *)_item;
4785         gint ok, exists = 0, unseen = 0;
4786         guint32 uid_next = 0, uid_val = 0;
4787         gboolean selected_folder;
4788
4789         g_return_val_if_fail(folder != NULL, FALSE);
4790         g_return_val_if_fail(item != NULL, FALSE);
4791         g_return_val_if_fail(item->item.folder != NULL, FALSE);
4792         g_return_val_if_fail(FOLDER_CLASS(item->item.folder) == &imap_class, FALSE);
4793
4794         if (item->item.path == NULL)
4795                 return FALSE;
4796
4797         if (item->should_update) {
4798                 debug_print("scan already required\n");
4799                 return TRUE;
4800         }
4801         debug_print("getting session...\n");
4802         session = imap_session_get(folder);
4803
4804         g_return_val_if_fail(session != NULL, FALSE);
4805         lock_session(session); /* unlocked later in the function */
4806
4807         selected_folder = (session->mbox != NULL) &&
4808                           (!strcmp(session->mbox, item->item.path));
4809         if (selected_folder) {
4810                 if (!session->folder_content_changed) {
4811                         ok = imap_cmd_noop(session);
4812                         if (ok != MAILIMAP_NO_ERROR) {
4813                                 debug_print("disconnected!\n");
4814                                 if (!is_fatal(ok))
4815                                         session = imap_reconnect_if_possible(folder, session);
4816                                 else
4817                                         session = imap_session_get(folder);
4818                                 if (session == NULL)
4819                                         return FALSE;
4820                         }
4821
4822                         if (session->folder_content_changed) {
4823                                 debug_print("CHANGED (self-noop)! scan_required\n");
4824                                 item->should_update = TRUE;
4825                                 if (session->uid_validity && session->uid_validity != item->item.mtime) {
4826                                         item->item.mtime = session->uid_validity;
4827                                         item->should_trash_cache = TRUE;
4828                                 }
4829                                 unlock_session(session);
4830                                 return TRUE;
4831                         }
4832                 } else {
4833                         debug_print("CHANGED (previous noop)! scan_required\n");
4834                         item->should_update = TRUE;
4835                         if (session->uid_validity && session->uid_validity != item->item.mtime) {
4836                                 item->item.mtime = session->uid_validity;
4837                                 item->should_trash_cache = TRUE;
4838                         }
4839                         unlock_session(session);
4840                         return TRUE;
4841                 }
4842         } else {
4843                 ok = imap_status(session, IMAP_FOLDER(folder), item->item.path, IMAP_FOLDER_ITEM(item),
4844                                  &exists, &uid_next, &uid_val, &unseen, FALSE);
4845                 if (ok != MAILIMAP_NO_ERROR) {
4846                         return FALSE;
4847                 }
4848
4849                 debug_print("exists %d, item->item.total_msgs %d\n"
4850                             "\tunseen %d, item->item.unread_msgs %d\n"
4851                             "\tuid_next %d, item->uid_next %d\n"
4852                             "\tuid_val %d, item->item.mtime %ld\n",
4853                             exists, item->item.total_msgs, unseen, item->item.unread_msgs,
4854                             uid_next, item->uid_next, uid_val, (long)(item->item.mtime));
4855                 if (exists != item->item.total_msgs
4856                     || unseen != item->item.unread_msgs
4857                     || uid_next != item->uid_next
4858                     || uid_val != item->item.mtime) {
4859                         debug_print("CHANGED (status)! scan_required\n");
4860                         item->last_change = time(NULL);
4861                         item->should_update = TRUE;
4862                         item->uid_next = uid_next;
4863                         if (uid_val != item->item.mtime) {
4864                                 item->item.mtime = uid_val;
4865                                 item->should_trash_cache = TRUE;
4866                         }
4867                         unlock_session(session);
4868                         return TRUE;
4869                 }
4870         }
4871         unlock_session(session);
4872
4873         item->should_update = FALSE;
4874         return FALSE;
4875 }
4876
4877 void imap_change_flags(Folder *folder, FolderItem *item, MsgInfo *msginfo, MsgPermFlags newflags)
4878 {
4879         IMAPSession *session;
4880         IMAPFlags flags_set = 0, flags_unset = 0;
4881         gint ok = MAILIMAP_NO_ERROR;
4882         MsgNumberList numlist;
4883         hashtable_data *ht_data = NULL;
4884
4885         g_return_if_fail(folder != NULL);
4886         g_return_if_fail(folder->klass == &imap_class);
4887         g_return_if_fail(item != NULL);
4888         g_return_if_fail(item->folder == folder);
4889         g_return_if_fail(msginfo != NULL);
4890         g_return_if_fail(msginfo->folder == item);
4891
4892         if (!MSG_IS_MARKED(msginfo->flags) &&  (newflags & MSG_MARKED))
4893                 flags_set |= IMAP_FLAG_FLAGGED;
4894         if ( MSG_IS_MARKED(msginfo->flags) && !(newflags & MSG_MARKED))
4895                 flags_unset |= IMAP_FLAG_FLAGGED;
4896
4897         if (!MSG_IS_UNREAD(msginfo->flags) &&  (newflags & MSG_UNREAD))
4898                 flags_unset |= IMAP_FLAG_SEEN;
4899         if ( MSG_IS_UNREAD(msginfo->flags) && !(newflags & MSG_UNREAD))
4900                 flags_set |= IMAP_FLAG_SEEN;
4901
4902         if (!MSG_IS_REPLIED(msginfo->flags) &&  (newflags & MSG_REPLIED))
4903                 flags_set |= IMAP_FLAG_ANSWERED;
4904         if ( MSG_IS_REPLIED(msginfo->flags) && !(newflags & MSG_REPLIED))
4905                 flags_unset |= IMAP_FLAG_ANSWERED;
4906
4907         if (!MSG_IS_FORWARDED(msginfo->flags) &&  (newflags & MSG_FORWARDED))
4908                 flags_set |= IMAP_FLAG_FORWARDED;
4909         if ( MSG_IS_FORWARDED(msginfo->flags) && !(newflags & MSG_FORWARDED))
4910                 flags_unset |= IMAP_FLAG_FORWARDED;
4911
4912         if (!MSG_IS_SPAM(msginfo->flags) &&  (newflags & MSG_SPAM)) {
4913                 flags_set |= IMAP_FLAG_SPAM;
4914                 flags_unset |= IMAP_FLAG_HAM;
4915         }
4916         if ( MSG_IS_SPAM(msginfo->flags) && !(newflags & MSG_SPAM)) {
4917                 flags_set |= IMAP_FLAG_HAM;
4918                 flags_unset |= IMAP_FLAG_SPAM;
4919         }
4920         if (!MSG_IS_DELETED(msginfo->flags) &&  (newflags & MSG_DELETED))
4921                 flags_set |= IMAP_FLAG_DELETED;
4922         if ( MSG_IS_DELETED(msginfo->flags) && !(newflags & MSG_DELETED))
4923                 flags_unset |= IMAP_FLAG_DELETED;
4924
4925         if (!flags_set && !flags_unset) {
4926                 /* the changed flags were not translatable to IMAP-speak.
4927                  * like MSG_POSTFILTERED, so just apply. */
4928                 msginfo->flags.perm_flags = newflags;
4929                 return;
4930         }
4931
4932         debug_print("getting session...\n");
4933         session = imap_session_get(folder);
4934         if (!session) {
4935                 return;
4936         }
4937
4938         if ((ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
4939             NULL, NULL, NULL, NULL, NULL, FALSE)) != MAILIMAP_NO_ERROR) {
4940                 return;
4941         }
4942         numlist.next = NULL;
4943         numlist.data = GINT_TO_POINTER(msginfo->msgnum);
4944
4945         if (IMAP_FOLDER_ITEM(item)->batching) {
4946                 /* instead of performing an UID STORE command for each message change,
4947                  * as a lot of them can change "together", we just fill in hashtables
4948                  * and defer the treatment so that we're able to send only one
4949                  * command.
4950                  */
4951                 debug_print("IMAP batch mode on, deferring flags change\n");
4952                 if (flags_set) {
4953                         ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->flags_set_table,
4954                                 GINT_TO_POINTER(flags_set));
4955                         if (ht_data == NULL) {
4956                                 ht_data = g_new0(hashtable_data, 1);
4957                                 ht_data->item = IMAP_FOLDER_ITEM(item);
4958                                 g_hash_table_insert(IMAP_FOLDER_ITEM(item)->flags_set_table,
4959                                         GINT_TO_POINTER(flags_set), ht_data);
4960                         }
4961                         ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
4962                 }
4963                 if (flags_unset) {
4964                         ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->flags_unset_table,
4965                                 GINT_TO_POINTER(flags_unset));
4966                         if (ht_data == NULL) {
4967                                 ht_data = g_new0(hashtable_data, 1);
4968                                 ht_data->item = IMAP_FOLDER_ITEM(item);
4969                                 g_hash_table_insert(IMAP_FOLDER_ITEM(item)->flags_unset_table,
4970                                         GINT_TO_POINTER(flags_unset), ht_data);
4971                         }
4972                         ht_data->msglist = g_slist_prepend(ht_data->msglist,
4973                                         GINT_TO_POINTER(msginfo->msgnum));
4974                 }
4975         } else {
4976                 debug_print("IMAP changing flags\n");
4977                 if (flags_set) {
4978                         ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item), &numlist, flags_set, NULL, TRUE);
4979                         if (ok != MAILIMAP_NO_ERROR) {
4980                                 return;
4981                         }
4982                 }
4983
4984                 if (flags_unset) {
4985                         ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item), &numlist, flags_unset, NULL, FALSE);
4986                         if (ok != MAILIMAP_NO_ERROR) {
4987                                 return;
4988                         }
4989                 }
4990         }
4991         msginfo->flags.perm_flags = newflags;
4992         return;
4993 }
4994
4995 static gint imap_remove_msg(Folder *folder, FolderItem *item, gint uid)
4996 {
4997         gint ok;
4998         IMAPSession *session;
4999         gchar *dir;
5000         MsgNumberList numlist;
5001
5002         g_return_val_if_fail(folder != NULL, -1);
5003         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
5004         g_return_val_if_fail(item != NULL, -1);
5005
5006         debug_print("getting session...\n");
5007         session = imap_session_get(folder);
5008         if (!session) return -1;
5009
5010         ok = imap_select(session, IMAP_FOLDER(folder), item,
5011                          NULL, NULL, NULL, NULL, NULL, FALSE);
5012         if (ok != MAILIMAP_NO_ERROR) {
5013                 return ok;
5014         }
5015         numlist.next = NULL;
5016         numlist.data = GINT_TO_POINTER(uid);
5017
5018         ok = imap_set_message_flags
5019                 (session, IMAP_FOLDER_ITEM(item), &numlist, IMAP_FLAG_DELETED, NULL, TRUE);
5020         if (ok != MAILIMAP_NO_ERROR) {
5021                 log_warning(LOG_PROTOCOL, _("can't set deleted flags: %d\n"), uid);
5022                 return ok;
5023         }
5024
5025         ok = imap_cmd_expunge(session, folder->account->imap_use_trash);
5026
5027         if (ok != MAILIMAP_NO_ERROR) {
5028                 log_warning(LOG_PROTOCOL, _("can't expunge\n"));
5029                 return ok;
5030         }
5031
5032         IMAP_FOLDER_ITEM(item)->uid_list = g_slist_remove(
5033             IMAP_FOLDER_ITEM(item)->uid_list, numlist.data);
5034         dir = folder_item_get_path(item);
5035         if (is_dir_exist(dir))
5036                 remove_numbered_files(dir, uid, uid);
5037         g_free(dir);
5038         return MAILIMAP_NO_ERROR;
5039 }
5040
5041 static gint compare_msginfo(gconstpointer a, gconstpointer b)
5042 {
5043         return ((MsgInfo *)a)->msgnum - ((MsgInfo *)b)->msgnum;
5044 }
5045
5046 static guint gslist_find_next_num(MsgNumberList **list, guint num)
5047 {
5048         GSList *elem;
5049
5050         g_return_val_if_fail(list != NULL, -1);
5051
5052         for (elem = *list; elem != NULL; elem = g_slist_next(elem))
5053                 if (GPOINTER_TO_INT(elem->data) >= num)
5054                         break;
5055         *list = elem;
5056         return elem != NULL ? GPOINTER_TO_INT(elem->data) : (gint)-1;
5057 }
5058
5059 static gboolean flag_ok(IMAPFolderItem *item, guint flag)
5060 {
5061         if (item->ok_flags && g_slist_find(item->ok_flags, GUINT_TO_POINTER(flag))) {
5062                 debug_print("flag %d is OK\n", flag);
5063                 return TRUE;
5064         }
5065         if (item->can_create_flags == ITEM_CAN_CREATE_FLAGS) {
5066                 debug_print("creating flags is OK\n");
5067                 return TRUE;
5068         }
5069         return FALSE;
5070 }
5071
5072 /*
5073  * NEW and DELETED flags are not syncronized
5074  * - The NEW/RECENT flags in IMAP folders can not really be directly
5075  *   modified by Sylpheed
5076  * - The DELETE/DELETED flag in IMAP and Sylpheed don't have the same
5077  *   meaning, in IMAP it always removes the messages from the FolderItem
5078  *   in Sylpheed it can mean to move the message to trash
5079  */
5080
5081 typedef struct _get_flags_data {
5082         Folder *folder;
5083         FolderItem *item;
5084         MsgInfoList *msginfo_list;
5085         GHashTable *msgflags;
5086         gboolean full_search;
5087         gboolean done;
5088 } get_flags_data;
5089
5090 static /*gint*/ void *imap_get_flags_thread(void *data)
5091 {
5092         get_flags_data *stuff = (get_flags_data *)data;
5093         Folder *folder = stuff->folder;
5094         FolderItem *fitem = (FolderItem *) stuff->item;
5095         MsgInfoList *msginfo_list = stuff->msginfo_list;
5096         GHashTable *msgflags = stuff->msgflags;
5097         GSList *elem;
5098         carray * lep_uidtab;
5099         IMAPSession *session;
5100         gint ok;
5101         int r = MAILIMAP_NO_ERROR;
5102         GHashTable *flags_hash = NULL;
5103         GHashTable *tags_hash = NULL;
5104         gboolean full_search = stuff->full_search;
5105         GSList *sorted_list = NULL;
5106         GSList *unseen = NULL, *answered = NULL, *flagged = NULL, *deleted = NULL, *forwarded = NULL, *spam = NULL;
5107         GSList *seq_list, *cur;
5108         gboolean reverse_seen = FALSE;
5109         gboolean selected_folder;
5110         gint exists_cnt, unseen_cnt;
5111         gboolean got_alien_tags = FALSE;
5112
5113         session = imap_session_get(folder);
5114
5115         if (session == NULL) {
5116                 stuff->done = TRUE;
5117                 return GINT_TO_POINTER(-1);
5118         }
5119         selected_folder = (session->mbox != NULL) &&
5120                           (!strcmp(session->mbox, fitem->path));
5121
5122         lock_session(session);
5123         if (!selected_folder) {
5124                 ok = imap_select(session, IMAP_FOLDER(folder), fitem,
5125                         &exists_cnt, NULL, &unseen_cnt, NULL, NULL, TRUE);
5126                 if (ok != MAILIMAP_NO_ERROR) {
5127                         stuff->done = TRUE;
5128                         return GINT_TO_POINTER(-1);
5129                 }
5130
5131                 if (unseen_cnt > exists_cnt / 2)
5132                         reverse_seen = TRUE;
5133         }
5134         else {
5135                 if (fitem->unread_msgs > fitem->total_msgs / 2)
5136                         reverse_seen = TRUE;
5137         }
5138
5139         sorted_list = g_slist_sort(g_slist_copy(msginfo_list), compare_msginfo);
5140         if (!full_search) {
5141                 seq_list = imap_get_lep_set_from_msglist(IMAP_FOLDER(folder), msginfo_list);
5142         } else {
5143                 struct mailimap_set * set;
5144                 set = mailimap_set_new_interval(1, 0);
5145                 seq_list = g_slist_append(NULL, set);
5146         }
5147
5148         if (folder->account && folder->account->low_bandwidth) {
5149                 for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
5150                         struct mailimap_set * imapset;
5151                         clist * lep_uidlist;
5152                         int r;
5153
5154                         imapset = cur->data;
5155                         if (reverse_seen) {
5156                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SEEN, NULL,
5157                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5158                         }
5159                         else {
5160                                 r = imap_threaded_search(folder,
5161                                                          IMAP_SEARCH_TYPE_UNSEEN, NULL,
5162                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5163                         }
5164                         if (r == MAILIMAP_NO_ERROR) {
5165                                 GSList * uidlist;
5166
5167                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5168                                 mailimap_search_result_free(lep_uidlist);
5169
5170                                 unseen = g_slist_concat(unseen, uidlist);
5171                         } else {
5172                                 imap_handle_error(SESSION(session), NULL, r);
5173                                 goto bail;
5174                         }
5175
5176                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_FLAGGED, NULL,
5177                                                  NULL, full_search ? NULL:imapset, &lep_uidlist);
5178                         if (r == MAILIMAP_NO_ERROR) {
5179                                 GSList * uidlist;
5180
5181                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5182                                 mailimap_search_result_free(lep_uidlist);
5183
5184                                 flagged = g_slist_concat(flagged, uidlist);
5185                         } else {
5186                                 imap_handle_error(SESSION(session), NULL, r);
5187                                 goto bail;
5188                         }
5189
5190                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
5191                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_ANSWERED, NULL,
5192                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5193                                 if (r == MAILIMAP_NO_ERROR) {
5194                                         GSList * uidlist;
5195
5196                                         uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5197                                         mailimap_search_result_free(lep_uidlist);
5198
5199                                         answered = g_slist_concat(answered, uidlist);
5200                                 } else {
5201                                         imap_handle_error(SESSION(session), NULL, r);
5202                                         goto bail;
5203                                 }
5204
5205                                 if (flag_ok(IMAP_FOLDER_ITEM(fitem), IMAP_FLAG_FORWARDED)) {
5206                                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_FORWARDED, NULL,
5207                                                                  NULL, full_search ? NULL:imapset, &lep_uidlist);
5208                                         if (r == MAILIMAP_NO_ERROR) {
5209                                                 GSList * uidlist;
5210
5211                                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5212                                                 mailimap_search_result_free(lep_uidlist);
5213
5214                                                 forwarded = g_slist_concat(forwarded, uidlist);
5215                                         } else {
5216                                                 imap_handle_error(SESSION(session), NULL, r);
5217                                                 goto bail;
5218                                         }
5219                                 }
5220
5221                                 if (flag_ok(IMAP_FOLDER_ITEM(fitem), IMAP_FLAG_SPAM)) {
5222                                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SPAM, NULL,
5223                                                                  NULL, full_search ? NULL:imapset, &lep_uidlist);
5224                                         if (r == MAILIMAP_NO_ERROR) {
5225                                                 GSList * uidlist;
5226
5227                                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5228                                                 mailimap_search_result_free(lep_uidlist);
5229
5230                                                 spam = g_slist_concat(spam, uidlist);
5231                                         } else {
5232                                                 imap_handle_error(SESSION(session), NULL, r);
5233                                                 goto bail;
5234                                         }
5235                                 }
5236
5237                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_DELETED, NULL,
5238                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5239                                 if (r == MAILIMAP_NO_ERROR) {
5240                                         GSList * uidlist;
5241
5242                                         uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5243                                         mailimap_search_result_free(lep_uidlist);
5244
5245                                         deleted = g_slist_concat(deleted, uidlist);
5246                                 } else {
5247                                         imap_handle_error(SESSION(session), NULL, r);
5248                                         goto bail;
5249                                 }
5250                         }
5251                 }
5252
5253         } else {
5254                 r = imap_threaded_fetch_uid_flags(folder, 1, &lep_uidtab);
5255                 if (r == MAILIMAP_NO_ERROR) {
5256                         flags_hash = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, NULL);
5257                         tags_hash = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, NULL);
5258                         imap_flags_hash_from_lep_uid_flags_tab(lep_uidtab, flags_hash, tags_hash);
5259                         imap_fetch_uid_flags_list_free(lep_uidtab);
5260                 } else {
5261                         imap_handle_error(SESSION(session), NULL, r);
5262                         goto bail;
5263                 }
5264         }
5265
5266 bail:
5267         if (r == MAILIMAP_NO_ERROR)
5268                 unlock_session(session);
5269
5270         for (elem = sorted_list; elem != NULL; elem = g_slist_next(elem)) {
5271                 MsgInfo *msginfo;
5272                 MsgPermFlags flags, oldflags;
5273                 gboolean wasnew;
5274
5275                 msginfo = (MsgInfo *) elem->data;
5276                 flags = msginfo->flags.perm_flags;
5277                 wasnew = (flags & MSG_NEW);
5278                 oldflags = flags & ~(MSG_NEW|MSG_UNREAD|MSG_REPLIED|MSG_FORWARDED|MSG_MARKED|MSG_DELETED|MSG_SPAM);
5279
5280                 if (folder->account && folder->account->low_bandwidth) {
5281                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
5282                                 flags &= ~((reverse_seen ? 0 : MSG_UNREAD | MSG_NEW) | MSG_REPLIED | MSG_FORWARDED | MSG_MARKED | MSG_SPAM);
5283                         } else {
5284                                 flags &= ~((reverse_seen ? 0 : MSG_UNREAD | MSG_NEW | MSG_MARKED));
5285                         }
5286                         if (reverse_seen)
5287                                 flags |= MSG_UNREAD | (wasnew ? MSG_NEW : 0);
5288                         if (gslist_find_next_num(&unseen, msginfo->msgnum) == msginfo->msgnum) {
5289                                 if (!reverse_seen) {
5290                                         flags |= MSG_UNREAD | (wasnew ? MSG_NEW : 0);
5291                                 } else {
5292                                         flags &= ~(MSG_UNREAD | MSG_NEW);
5293                                 }
5294                         }
5295
5296                         if (gslist_find_next_num(&flagged, msginfo->msgnum) == msginfo->msgnum)
5297                                 flags |= MSG_MARKED;
5298                         else
5299                                 flags &= ~MSG_MARKED;
5300
5301                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
5302                                 if (gslist_find_next_num(&answered, msginfo->msgnum) == msginfo->msgnum)
5303                                         flags |= MSG_REPLIED;
5304                                 else
5305                                         flags &= ~MSG_REPLIED;
5306                                 if (gslist_find_next_num(&forwarded, msginfo->msgnum) == msginfo->msgnum)
5307                                         flags |= MSG_FORWARDED;
5308                                 else
5309                                         flags &= ~MSG_FORWARDED;
5310                                 if (gslist_find_next_num(&spam, msginfo->msgnum) == msginfo->msgnum)
5311                                         flags |= MSG_SPAM;
5312                                 else
5313                                         flags &= ~MSG_SPAM;
5314                                 if (gslist_find_next_num(&deleted, msginfo->msgnum) == msginfo->msgnum)
5315                                         flags |= MSG_DELETED;
5316                                 else
5317                                         flags &= ~MSG_DELETED;
5318                         }
5319                 } else {
5320                         if (flags_hash != NULL) {
5321
5322                                 flags = GPOINTER_TO_INT(g_hash_table_lookup(flags_hash,
5323                                                 GINT_TO_POINTER(msginfo->msgnum)));
5324                         }
5325
5326                         if ((flags & MSG_UNREAD) == 0)
5327                                 flags &= ~MSG_NEW;
5328                         else if (wasnew)
5329                                 flags |= MSG_NEW;
5330                         flags |= oldflags;
5331
5332                         if (tags_hash != NULL) {
5333                                 GSList *tags = g_hash_table_lookup(tags_hash, GINT_TO_POINTER(msginfo->msgnum));
5334                                 GSList *cur;
5335
5336                                 g_slist_free(msginfo->tags);
5337                                 msginfo->tags = NULL;
5338
5339                                 for (cur = tags; cur; cur = cur->next) {
5340                                         gchar *real_tag = imap_modified_utf7_to_utf8(cur->data, TRUE);
5341                                         gint id = 0;
5342                                         id = tags_get_id_for_str(real_tag);
5343                                         if (id == -1) {
5344                                                 id = tags_add_tag(real_tag);
5345                                                 got_alien_tags = TRUE;
5346                                         }
5347                                         msginfo->tags = g_slist_append(
5348                                                                 msginfo->tags,
5349                                                                 GINT_TO_POINTER(id));
5350                                         g_free(real_tag);
5351                                 }
5352                                 slist_free_strings_full(tags);
5353                         }
5354                 }
5355
5356                 g_hash_table_insert(msgflags, msginfo, GINT_TO_POINTER(flags));
5357         }
5358
5359         if (got_alien_tags) {
5360                 tags_write_tags();
5361                 main_window_reflect_tags_changes(mainwindow_get_mainwindow());
5362         }
5363
5364         if (flags_hash)
5365                 g_hash_table_destroy(flags_hash);
5366         if (tags_hash)
5367                 g_hash_table_destroy(tags_hash);
5368
5369         imap_lep_set_free(seq_list);
5370         g_slist_free(flagged);
5371         g_slist_free(deleted);
5372         g_slist_free(answered);
5373         g_slist_free(forwarded);
5374         g_slist_free(spam);
5375         g_slist_free(unseen);
5376         g_slist_free(sorted_list);
5377
5378         stuff->done = TRUE;
5379         return GINT_TO_POINTER(0);
5380 }
5381
5382 static gint imap_get_flags(Folder *folder, FolderItem *item,
5383                            MsgInfoList *msginfo_list, GHashTable *msgflags)
5384 {
5385         gint result;
5386         get_flags_data *data = g_new0(get_flags_data, 1);
5387         data->done = FALSE;
5388         data->folder = folder;
5389         data->item = item;
5390         data->msginfo_list = msginfo_list;
5391         data->msgflags = msgflags;
5392         data->full_search = FALSE;
5393
5394         GSList *tmp = NULL, *cur;
5395
5396         if (prefs_common.work_offline &&
5397             !inc_offline_should_override(FALSE,
5398                 _("Claws Mail needs network access in order "
5399                   "to access the IMAP server."))) {
5400                 g_free(data);
5401                 return -1;
5402         }
5403
5404         tmp = folder_item_get_msg_list(item);
5405
5406         if (g_slist_length(tmp) <= g_slist_length(msginfo_list))
5407                 data->full_search = TRUE;
5408
5409         for (cur = tmp; cur; cur = cur->next)
5410                 procmsg_msginfo_free((MsgInfo *)cur->data);
5411
5412         g_slist_free(tmp);
5413
5414         result = GPOINTER_TO_INT(imap_get_flags_thread(data));
5415
5416         g_free(data);
5417         return result;
5418
5419 }
5420
5421 static gboolean process_flags(gpointer key, gpointer value, gpointer user_data)
5422 {
5423         gboolean flags_set = GPOINTER_TO_INT(user_data);
5424         gint flags_value = GPOINTER_TO_INT(key);
5425         hashtable_data *data = (hashtable_data *)value;
5426         IMAPFolderItem *_item = data->item;
5427         FolderItem *item = (FolderItem *)_item;
5428         gint ok = MAILIMAP_ERROR_BAD_STATE;
5429         IMAPSession *session = NULL;
5430
5431         debug_print("getting session...\n");
5432         session = imap_session_get(item->folder);
5433
5434         data->msglist = g_slist_reverse(data->msglist);
5435
5436         debug_print("IMAP %ssetting flags to %d for %d messages\n",
5437                 flags_set?"":"un",
5438                 flags_value,
5439                 g_slist_length(data->msglist));
5440
5441         lock_session(session);
5442         if (session) {
5443                 ok = imap_select(session, IMAP_FOLDER(item->folder), item,
5444                          NULL, NULL, NULL, NULL, NULL, FALSE);
5445         }
5446         if (ok == MAILIMAP_NO_ERROR) {
5447                 ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item),
5448                         data->msglist, flags_value, NULL, flags_set);
5449         } else {
5450                 g_warning("can't select mailbox %s", item->path);
5451         }
5452
5453         if (!is_fatal(ok))
5454                 unlock_session(session);
5455
5456         g_slist_free(data->msglist);
5457         g_free(data);
5458         return TRUE;
5459 }
5460
5461 static gboolean process_tags(gpointer key, gpointer value, gpointer user_data)
5462 {
5463         gboolean tags_set = GPOINTER_TO_INT(user_data);
5464         TagsData *data = (TagsData *)value;
5465         IMAPFolderItem *_item = data->item;
5466         FolderItem *item = (FolderItem *)_item;
5467         gchar *str = data->str;
5468         gint ok = MAILIMAP_ERROR_BAD_STATE;
5469         IMAPSession *session = NULL;
5470
5471         debug_print("getting session...\n");
5472         session = imap_session_get(item->folder);
5473
5474         data->msglist = g_slist_reverse(data->msglist);
5475
5476         debug_print("IMAP %ssetting tags %s for %d messages\n",
5477                 tags_set?"":"un",
5478                 str,
5479                 g_slist_length(data->msglist));
5480
5481         lock_session(session);
5482         if (session) {
5483                 ok = imap_select(session, IMAP_FOLDER(item->folder), item,
5484                          NULL, NULL, NULL, NULL, NULL, FALSE);
5485         }
5486         if (ok == MAILIMAP_NO_ERROR) {
5487                 GSList list;
5488                 list.data = str;
5489                 list.next = NULL;
5490                 ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item),
5491                         data->msglist, 0, &list, tags_set);
5492         } else {
5493                 g_warning("can't select mailbox %s", item->path);
5494         }
5495
5496         if (!is_fatal(ok))
5497                 unlock_session(session);
5498
5499         g_slist_free(data->msglist);
5500         g_free(data->str);
5501         g_free(data);
5502         return TRUE;
5503 }
5504
5505 static void process_hashtable(IMAPFolderItem *item)
5506 {
5507         if (item->flags_set_table) {
5508                 g_hash_table_foreach_remove(item->flags_set_table, process_flags, GINT_TO_POINTER(TRUE));
5509                 g_hash_table_destroy(item->flags_set_table);
5510                 item->flags_set_table = NULL;
5511         }
5512         if (item->flags_unset_table) {
5513                 g_hash_table_foreach_remove(item->flags_unset_table, process_flags, GINT_TO_POINTER(FALSE));
5514                 g_hash_table_destroy(item->flags_unset_table);
5515                 item->flags_unset_table = NULL;
5516         }
5517         if (item->tags_set_table) {
5518                 g_hash_table_foreach_remove(item->tags_set_table, process_tags, GINT_TO_POINTER(TRUE));
5519                 g_hash_table_destroy(item->tags_set_table);
5520                 item->tags_set_table = NULL;
5521         }
5522         if (item->tags_unset_table) {
5523                 g_hash_table_foreach_remove(item->tags_unset_table, process_tags, GINT_TO_POINTER(FALSE));
5524                 g_hash_table_destroy(item->tags_unset_table);
5525                 item->tags_unset_table = NULL;
5526         }
5527
5528 }
5529
5530 static void imap_set_batch (Folder *folder, FolderItem *_item, gboolean batch)
5531 {
5532         IMAPFolderItem *item = (IMAPFolderItem *)_item;
5533         IMAPSession *session;
5534
5535         g_return_if_fail(item != NULL);
5536
5537         if (item->batching == batch)
5538                 return;
5539
5540         if (batch) {
5541                 item->batching = TRUE;
5542                 debug_print("IMAP switching to batch mode\n");
5543                 if (!item->flags_set_table) {
5544                         item->flags_set_table = g_hash_table_new(NULL, g_direct_equal);
5545                 }
5546                 if (!item->flags_unset_table) {
5547                         item->flags_unset_table = g_hash_table_new(NULL, g_direct_equal);
5548                 }
5549                 if (!item->tags_set_table) {
5550                         item->tags_set_table = g_hash_table_new(NULL, g_direct_equal);
5551                 }
5552                 if (!item->tags_unset_table) {
5553                         item->tags_unset_table = g_hash_table_new(NULL, g_direct_equal);
5554                 }
5555                 session = imap_session_get(folder);
5556                 if (session) {
5557                         imap_refresh_sensitivity(session);
5558                         session->sens_update_block = TRUE;
5559                 }
5560         } else {
5561                 debug_print("IMAP switching away from batch mode\n");
5562                 /* process stuff */
5563                 process_hashtable(item);
5564                 item->batching = FALSE;
5565                 session = imap_session_get(folder);
5566                 if (session) {
5567                         session->sens_update_block = FALSE;
5568                         imap_refresh_sensitivity(session);
5569                 }
5570         }
5571 }
5572
5573
5574
5575 /* data types conversion libetpan <-> claws */
5576
5577
5578
5579 #define ETPAN_IMAP_MB_MARKED      1
5580 #define ETPAN_IMAP_MB_UNMARKED    2
5581 #define ETPAN_IMAP_MB_NOSELECT    4
5582 #define ETPAN_IMAP_MB_NOINFERIORS 8
5583
5584 static int imap_flags_to_flags(struct mailimap_mbx_list_flags * imap_flags)
5585 {
5586   int flags;
5587   clistiter * cur;
5588
5589   flags = 0;
5590   if (imap_flags->mbf_type == MAILIMAP_MBX_LIST_FLAGS_SFLAG) {
5591     switch (imap_flags->mbf_sflag) {
5592     case MAILIMAP_MBX_LIST_SFLAG_MARKED:
5593       flags |= ETPAN_IMAP_MB_MARKED;
5594       break;
5595     case MAILIMAP_MBX_LIST_SFLAG_NOSELECT:
5596       flags |= ETPAN_IMAP_MB_NOSELECT;
5597       break;
5598     case MAILIMAP_MBX_LIST_SFLAG_UNMARKED:
5599       flags |= ETPAN_IMAP_MB_UNMARKED;
5600       break;
5601     }
5602   }
5603
5604   if (imap_flags->mbf_oflags) {
5605     for(cur = clist_begin(imap_flags->mbf_oflags) ; cur != NULL ;
5606         cur = clist_next(cur)) {
5607       struct mailimap_mbx_list_oflag * oflag;
5608
5609       oflag = clist_content(cur);
5610
5611       switch (oflag->of_type) {
5612       case MAILIMAP_MBX_LIST_OFLAG_NOINFERIORS:
5613         flags |= ETPAN_IMAP_MB_NOINFERIORS;
5614         break;
5615       }
5616     }
5617   }
5618   return flags;
5619 }
5620
5621 static GSList * imap_list_from_lep(IMAPFolder * folder,
5622                                    clist * list, const gchar * real_path, gboolean all)
5623 {
5624         clistiter * iter;
5625         GSList * item_list = NULL, *llast = NULL;
5626
5627         if (list) {
5628                 for(iter = clist_begin(list) ; iter != NULL ;
5629                     iter = clist_next(iter)) {
5630                         struct mailimap_mailbox_list * mb;
5631                         int flags;
5632                         char delimiter;
5633                         char * name;
5634                         char * dup_name;
5635                         gchar * base;
5636                         gchar * loc_name;
5637                         gchar * loc_path;
5638                         FolderItem *new_item;
5639
5640                         mb = clist_content(iter);
5641
5642                         if (mb == NULL)
5643                                 continue;
5644
5645                         flags = 0;
5646                         if (mb->mb_flag != NULL)
5647                                 flags = imap_flags_to_flags(mb->mb_flag);
5648
5649                         delimiter = mb->mb_delimiter;
5650                         name = mb->mb_name;
5651
5652                         dup_name = strdup(name);
5653                         if (delimiter != '\0')
5654                                 subst_char(dup_name, delimiter, '/');
5655
5656                         base = g_path_get_basename(dup_name);
5657                         if (base[0] == '.') {
5658                                 g_free(base);
5659                                 free(dup_name);
5660                                 continue;
5661                         }
5662                         if (!all && path_cmp(name, real_path) == 0) {
5663                                 g_free(base);
5664                                 free(dup_name);
5665                                 continue;
5666                         }
5667
5668                         if (!all && dup_name[strlen(dup_name)-1] == '/') {
5669                                 g_free(base);
5670                                 free(dup_name);
5671                                 continue;
5672                         }
5673
5674                         loc_name = imap_modified_utf7_to_utf8(base, FALSE);
5675                         loc_path = imap_modified_utf7_to_utf8(dup_name, FALSE);
5676
5677                         new_item = folder_item_new(FOLDER(folder), loc_name, loc_path);
5678                         if ((flags & ETPAN_IMAP_MB_NOINFERIORS) != 0)
5679                                 new_item->no_sub = TRUE;
5680                         if (strcasecmp(dup_name, "INBOX") != 0 &&
5681                             ((flags & ETPAN_IMAP_MB_NOSELECT) != 0))
5682                                 new_item->no_select = TRUE;
5683
5684                         if (item_list == NULL)
5685                                 llast = item_list = g_slist_append(item_list, new_item);
5686                         else {
5687                                 llast = g_slist_append(llast, new_item);
5688                                 llast = llast->next;
5689                         }
5690                         debug_print("folder '%s' found.\n", loc_path);
5691                         g_free(base);
5692                         g_free(loc_path);
5693                         g_free(loc_name);
5694
5695                         free(dup_name);
5696                 }
5697         }
5698         return item_list;
5699 }
5700
5701 static GSList * imap_get_lep_set_from_numlist(IMAPFolder *folder, MsgNumberList *numlist)
5702 {
5703         GSList *sorted_list, *cur;
5704         guint first, last, next;
5705         GSList *ret_list = NULL, *llast = NULL;
5706         struct mailimap_set * current_set;
5707         unsigned int item_count;
5708
5709         if (numlist == NULL)
5710                 return NULL;
5711
5712         current_set = mailimap_set_new_empty();
5713
5714         sorted_list = g_slist_copy(numlist);
5715         sorted_list = g_slist_sort(sorted_list, g_int_compare);
5716
5717         first = GPOINTER_TO_INT(sorted_list->data);
5718
5719         item_count = 0;
5720         for (cur = sorted_list; cur != NULL; cur = g_slist_next(cur)) {
5721                 if (GPOINTER_TO_INT(cur->data) == 0)
5722                         continue;
5723
5724                 item_count ++;
5725
5726                 last = GPOINTER_TO_INT(cur->data);
5727                 if (cur->next)
5728                         next = GPOINTER_TO_INT(cur->next->data);
5729                 else
5730                         next = 0;
5731
5732                 if (last + 1 != next || next == 0 || item_count >= folder->max_set_size) {
5733
5734                         struct mailimap_set_item * item;
5735                         item = mailimap_set_item_new(first, last);
5736                         mailimap_set_add(current_set, item);
5737
5738                         first = next;
5739
5740                         if (item_count >= folder->max_set_size) {
5741                                 if (ret_list == NULL)
5742                                         llast = ret_list = g_slist_append(ret_list,
5743                                                           current_set);
5744                                 else {
5745                                         llast = g_slist_append(llast, current_set);
5746                                         llast = llast->next;
5747                                 }
5748
5749                                 current_set = mailimap_set_new_empty();
5750                                 item_count = 0;
5751                         }
5752                 }
5753         }
5754
5755         if (clist_count(current_set->set_list) > 0) {
5756                 ret_list = g_slist_append(ret_list,
5757                                           current_set);
5758         }
5759
5760         g_slist_free(sorted_list);
5761
5762         return ret_list;
5763 }
5764
5765 static GSList * imap_get_lep_set_from_msglist(IMAPFolder *folder, MsgInfoList *msglist)
5766 {
5767         MsgNumberList *numlist = NULL;
5768         GSList *seq_list;
5769
5770         numlist = procmsg_get_number_list_for_msgs(msglist);
5771
5772         seq_list = imap_get_lep_set_from_numlist(folder, numlist);
5773         g_slist_free(numlist);
5774
5775         return seq_list;
5776 }
5777
5778 static GSList * imap_uid_list_from_lep(clist * list, gint* length)
5779 {
5780         clistiter * iter;
5781         GSList * result;
5782         gint len = 0;
5783
5784         result = NULL;
5785
5786         if (list) {
5787                 for(iter = clist_begin(list) ; iter != NULL ;
5788                     iter = clist_next(iter)) {
5789                         uint32_t * puid;
5790
5791                         puid = clist_content(iter);
5792                         result = g_slist_prepend(result, GINT_TO_POINTER(* puid));
5793                         len++;
5794                 }
5795                 result = g_slist_reverse(result);
5796         }
5797         if (length)
5798                 *length = len;
5799         return result;
5800 }
5801
5802 static GSList * imap_uid_list_from_lep_tab(carray * list)
5803 {
5804         unsigned int i;
5805         GSList * result;
5806
5807         result = NULL;
5808
5809         for(i = 0 ; i < carray_count(list) ; i ++) {
5810                 uint32_t * puid;
5811
5812                 puid = carray_get(list, i);
5813                 result = g_slist_prepend(result, GINT_TO_POINTER(* puid));
5814         }
5815         result = g_slist_reverse(result);
5816         return result;
5817 }
5818
5819 static void imap_flags_hash_from_lep_uid_flags_tab(carray * list,
5820                                                    GHashTable * hash,
5821                                                    GHashTable * tags_hash)
5822 {
5823         unsigned int i;
5824
5825         for(i = 0 ; i < carray_count(list) ; i += 3) {
5826                 uint32_t * puid;
5827                 int * pflags;
5828                 GSList *tags;
5829
5830                 puid = carray_get(list, i);
5831                 pflags = carray_get(list, i + 1);
5832                 tags = carray_get(list, i + 2);
5833
5834                 g_hash_table_insert(hash, GINT_TO_POINTER(*puid), GINT_TO_POINTER(* pflags));
5835                 g_hash_table_insert(tags_hash, GINT_TO_POINTER(*puid), tags);
5836         }
5837 }
5838
5839 static MsgInfo *imap_envelope_from_lep(struct imap_fetch_env_info * info,
5840                                        FolderItem *item)
5841 {
5842         MsgInfo *msginfo = NULL;
5843         guint32 uid = 0;
5844         goffset size = 0;
5845         MsgFlags flags = {0, 0};
5846
5847         if (info->headers == NULL)
5848                 return NULL;
5849
5850         MSG_SET_TMP_FLAGS(flags, MSG_IMAP);
5851         if (folder_has_parent_of_type(item, F_QUEUE)) {
5852                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
5853         } else if (folder_has_parent_of_type(item, F_DRAFT)) {
5854                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
5855         }
5856         flags.perm_flags = info->flags;
5857
5858         uid = info->uid;
5859         size = (goffset) info->size;
5860         msginfo = procheader_parse_str(info->headers, flags, FALSE, FALSE);
5861
5862         if (msginfo) {
5863                 msginfo->msgnum = uid;
5864                 msginfo->size = size;
5865         }
5866
5867         return msginfo;
5868 }
5869
5870 static void imap_lep_set_free(GSList *seq_list)
5871 {
5872         GSList * cur;
5873
5874         for(cur = seq_list ; cur != NULL ; cur = g_slist_next(cur)) {
5875                 struct mailimap_set * imapset;
5876
5877                 imapset = cur->data;
5878                 mailimap_set_free(imapset);
5879         }
5880         g_slist_free(seq_list);
5881 }
5882
5883 static struct mailimap_flag_list * imap_flag_to_lep(IMAPFolderItem *item, IMAPFlags flags, GSList *tags)
5884 {
5885         struct mailimap_flag_list * flag_list;
5886         GSList *cur = tags;
5887
5888         flag_list = mailimap_flag_list_new_empty();
5889
5890         if (IMAP_IS_SEEN(flags))
5891                 mailimap_flag_list_add(flag_list,
5892                                        mailimap_flag_new_seen());
5893         if (IMAP_IS_ANSWERED(flags))
5894                 mailimap_flag_list_add(flag_list,
5895                                        mailimap_flag_new_answered());
5896         if (IMAP_IS_FLAGGED(flags))
5897                 mailimap_flag_list_add(flag_list,
5898                                        mailimap_flag_new_flagged());
5899         if (IMAP_IS_DELETED(flags))
5900                 mailimap_flag_list_add(flag_list,
5901                                        mailimap_flag_new_deleted());
5902         if (IMAP_IS_DRAFT(flags))
5903                 mailimap_flag_list_add(flag_list,
5904                                        mailimap_flag_new_draft());
5905         if (IMAP_IS_FORWARDED(flags) && flag_ok(item, IMAP_FLAG_FORWARDED))
5906                 mailimap_flag_list_add(flag_list,
5907                                        mailimap_flag_new_flag_keyword(strdup(RTAG_FORWARDED)));
5908         if (IMAP_IS_SPAM(flags) && flag_ok(item, IMAP_FLAG_SPAM))
5909                 mailimap_flag_list_add(flag_list,
5910                                        mailimap_flag_new_flag_keyword(strdup(RTAG_JUNK)));
5911         else if (IMAP_IS_HAM(flags) && flag_ok(item, IMAP_FLAG_HAM))
5912                 mailimap_flag_list_add(flag_list,
5913                                        mailimap_flag_new_flag_keyword(strdup(RTAG_NON_JUNK)));
5914
5915         for (; cur; cur = cur->next) {
5916                 gchar *enc_str =
5917                         imap_utf8_to_modified_utf7(cur->data, TRUE);
5918                 g_strstrip(enc_str);
5919
5920                 mailimap_flag_list_add(flag_list,
5921                         mailimap_flag_new_flag_keyword(enc_str));
5922         }
5923
5924         return flag_list;
5925 }
5926
5927 guint imap_folder_get_refcnt(Folder *folder)
5928 {
5929         return ((IMAPFolder *)folder)->refcnt;
5930 }
5931
5932 void imap_folder_ref(Folder *folder)
5933 {
5934         ((IMAPFolder *)folder)->refcnt++;
5935 }
5936
5937 void imap_disconnect_all(gboolean have_connectivity)
5938 {
5939         GList *list;
5940         gboolean short_timeout;
5941 #ifdef HAVE_NETWORKMANAGER_SUPPORT
5942         GError *error = NULL;
5943
5944         short_timeout = !networkmanager_is_online(&error);
5945         if(error) {
5946                 short_timeout = TRUE;
5947                 g_error_free(error);
5948         }
5949 #else
5950         short_timeout = TRUE;
5951 #endif
5952
5953         if(short_timeout)
5954                 imap_main_set_timeout(1);
5955
5956         for (list = account_get_list(); list != NULL; list = list->next) {
5957                 PrefsAccount *account = list->data;
5958                 if (account->protocol == A_IMAP4) {
5959                         RemoteFolder *folder = (RemoteFolder *)account->folder;
5960                         if (folder && folder->session) {
5961                                 if (imap_is_busy(FOLDER(folder)))
5962                                         imap_threaded_cancel(FOLDER(folder));
5963
5964                                 IMAPSession *session = (IMAPSession *)folder->session;
5965                                 if (have_connectivity)
5966                                         imap_threaded_disconnect(FOLDER(folder));
5967                                 SESSION(session)->state = SESSION_DISCONNECTED;
5968                                 SESSION(session)->sock = NULL;
5969                                 imap_safe_destroy(session);
5970                                 folder->session = NULL;
5971                         }
5972                 }
5973         }
5974
5975         if(short_timeout)
5976                 imap_main_set_timeout(prefs_common.io_timeout_secs);
5977 }
5978
5979 void imap_folder_unref(Folder *folder)
5980 {
5981         if (((IMAPFolder *)folder)->refcnt > 0)
5982                 ((IMAPFolder *)folder)->refcnt--;
5983 }
5984
5985 void imap_cancel_all(void)
5986 {
5987         GList *folderlist;
5988         GList *cur;
5989
5990         folderlist = folder_get_list();
5991         for (cur = folderlist; cur != NULL; cur = g_list_next(cur)) {
5992                 Folder *folder = (Folder *) cur->data;
5993
5994                 if (folder->klass == &imap_class) {
5995                         if (imap_is_busy(folder)) {
5996                                 IMAPSession *imap_session;
5997                                 RemoteFolder *rfolder;
5998
5999                                 g_printerr("cancelled\n");
6000                                 imap_threaded_cancel(folder);
6001                                 rfolder = (RemoteFolder *) folder;
6002                                 imap_session = (IMAPSession *) rfolder->session;
6003                                 if (imap_session)
6004                                         imap_session->cancelled = 1;
6005                         }
6006                 }
6007         }
6008 }
6009
6010 gboolean imap_cancel_all_enabled(void)
6011 {
6012         GList *folderlist;
6013         GList *cur;
6014
6015         folderlist = folder_get_list();
6016         for (cur = folderlist; cur != NULL; cur = g_list_next(cur)) {
6017                 Folder *folder = (Folder *) cur->data;
6018
6019                 if (folder->klass == &imap_class) {
6020                         if (imap_is_busy(folder)) {
6021                                 return TRUE;
6022                         }
6023                 }
6024         }
6025
6026         return FALSE;
6027 }
6028
6029 static gboolean imap_is_busy(Folder *folder)
6030 {
6031         IMAPSession *imap_session;
6032         RemoteFolder *rfolder;
6033
6034         rfolder = (RemoteFolder *) folder;
6035         imap_session = (IMAPSession *) rfolder->session;
6036         if (imap_session == NULL)
6037                 return FALSE;
6038
6039         return imap_session->busy;
6040 }
6041
6042 #else /* HAVE_LIBETPAN */
6043
6044 static FolderClass imap_class;
6045
6046 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item);
6047 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag);
6048
6049 static Folder   *imap_folder_new        (const gchar    *name,
6050                                          const gchar    *path)
6051 {
6052         static gboolean missing_imap_warning = TRUE;
6053         if (missing_imap_warning) {
6054                 missing_imap_warning = FALSE;
6055                 alertpanel_error(
6056                         _("You have one or more IMAP accounts "
6057                           "defined. However this version of "
6058                           "Claws Mail has been built without "
6059                           "IMAP support; your IMAP account(s) are "
6060                           "disabled.\n\n"
6061                           "You probably need to "
6062                           "install libetpan and recompile "
6063                           "Claws Mail."));
6064         }
6065         return NULL;
6066 }
6067 static gint     imap_create_tree        (Folder         *folder)
6068 {
6069         return -1;
6070 }
6071 static FolderItem *imap_create_folder   (Folder         *folder,
6072                                          FolderItem     *parent,
6073                                          const gchar    *name)
6074 {
6075         return NULL;
6076 }
6077 static gint     imap_rename_folder      (Folder         *folder,
6078                                          FolderItem     *item,
6079                                          const gchar    *name)
6080 {
6081         return -1;
6082 }
6083
6084 gchar imap_get_path_separator_for_item(FolderItem *item)
6085 {
6086         return '/';
6087 }
6088
6089 FolderClass *imap_get_class(void)
6090 {
6091         if (imap_class.idstr == NULL) {
6092                 imap_class.type = F_IMAP;
6093                 imap_class.idstr = "imap";
6094                 imap_class.uistr = "IMAP4";
6095
6096                 imap_class.new_folder = imap_folder_new;
6097                 imap_class.create_tree = imap_create_tree;
6098                 imap_class.create_folder = imap_create_folder;
6099                 imap_class.rename_folder = imap_rename_folder;
6100
6101                 imap_class.set_xml = folder_set_xml;
6102                 imap_class.get_xml = folder_get_xml;
6103                 imap_class.item_set_xml = imap_item_set_xml;
6104                 imap_class.item_get_xml = imap_item_get_xml;
6105                 /* nothing implemented */
6106         }
6107
6108         return &imap_class;
6109 }
6110
6111 void imap_disconnect_all(gboolean have_connectivity)
6112 {
6113 }
6114
6115 gint imap_subscribe(Folder *folder, FolderItem *item, gchar *rpath, gboolean sub)
6116 {
6117         return -1;
6118 }
6119
6120 GList * imap_scan_subtree(Folder *folder, FolderItem *item, gboolean unsubs_only, gboolean recursive)
6121 {
6122         return NULL;
6123 }
6124
6125 void imap_cache_msg(FolderItem *item, gint msgnum)
6126 {
6127 }
6128
6129 void imap_cancel_all(void)
6130 {
6131 }
6132
6133 gboolean imap_cancel_all_enabled(void)
6134 {
6135         return FALSE;
6136 }
6137
6138 #endif
6139
6140 #ifdef HAVE_LIBETPAN
6141 static void imap_synchronise(FolderItem *item, gint days)
6142 {
6143         if (IMAP_FOLDER_ITEM(item)->last_sync == IMAP_FOLDER_ITEM(item)->last_change) {
6144                 debug_print("%s already synced\n", item->path?item->path:item->name);
6145                 return;
6146         }
6147         debug_print("syncing %s\n", item->path?item->path:item->name);
6148         imap_gtk_synchronise(item, days);
6149         IMAP_FOLDER_ITEM(item)->last_sync = IMAP_FOLDER_ITEM(item)->last_change;
6150 }
6151 #endif
6152
6153 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag)
6154 {
6155 #ifdef HAVE_LIBETPAN
6156         GList *cur;
6157 #endif
6158         folder_item_set_xml(folder, item, tag);
6159
6160 #ifdef HAVE_LIBETPAN
6161         for (cur = tag->attr; cur != NULL; cur = g_list_next(cur)) {
6162                 XMLAttr *attr = (XMLAttr *) cur->data;
6163
6164                 if (!attr || !attr->name || !attr->value) continue;
6165                 if (!strcmp(attr->name, "uidnext"))
6166                         IMAP_FOLDER_ITEM(item)->uid_next = atoi(attr->value);
6167                 if (!strcmp(attr->name, "last_sync"))
6168                         IMAP_FOLDER_ITEM(item)->last_sync = atoi(attr->value);
6169                 if (!strcmp(attr->name, "last_change"))
6170                         IMAP_FOLDER_ITEM(item)->last_change = atoi(attr->value);
6171         }
6172         if (IMAP_FOLDER_ITEM(item)->last_change == 0)
6173                 IMAP_FOLDER_ITEM(item)->last_change = time(NULL);
6174 #endif
6175 }
6176
6177 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item)
6178 {
6179         XMLTag *tag;
6180
6181         tag = folder_item_get_xml(folder, item);
6182
6183 #ifdef HAVE_LIBETPAN
6184         xml_tag_add_attr(tag, xml_attr_new_int("uidnext",
6185                         IMAP_FOLDER_ITEM(item)->uid_next));
6186         xml_tag_add_attr(tag, xml_attr_new_int("last_sync",
6187                         IMAP_FOLDER_ITEM(item)->last_sync));
6188         xml_tag_add_attr(tag, xml_attr_new_int("last_change",
6189                         IMAP_FOLDER_ITEM(item)->last_change));
6190
6191 #endif
6192         return tag;
6193 }
6194
6195 /* ===================================================================
6196  * UTF-7 conversion routines as in RFC 2192
6197  * ===================================================================
6198  * These two functions from:
6199  * libimap library.
6200  * Copyright (C) 2003-2004 Pawel Salek. */
6201
6202 /* UTF7 modified base64 alphabet */
6203 static char base64chars[] =
6204   "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+,";
6205 #define UNDEFINED 64
6206
6207 /* UTF16 definitions */
6208 #define UTF16MASK       0x03FFUL
6209 #define UTF16SHIFT      10
6210 #define UTF16BASE       0x10000UL
6211 #define UTF16HIGHSTART  0xD800UL
6212 #define UTF16HIGHEND    0xDBFFUL
6213 #define UTF16LOSTART    0xDC00UL
6214 #define UTF16LOEND      0xDFFFUL
6215
6216
6217 /* Convert an IMAP mailbox to a UTF-8 string.
6218  *  dst needs to have roughly 4 times the storage space of src
6219  *    Hex encoding can triple the size of the input
6220  *    UTF-7 can be slightly denser than UTF-8
6221  *     (worst case: 8 octets UTF-7 becomes 9 octets UTF-8)
6222  */
6223 char* imap_modified_utf7_to_utf8(const char *mbox, gboolean change_spaces)
6224 {
6225   unsigned c, i, bitcount;
6226   unsigned long ucs4, utf16, bitbuf;
6227   unsigned char base64[256];
6228   const char *src;
6229   char *dst, *res  = g_malloc(2*strlen(mbox)+1);
6230
6231   dst = res;
6232   src = mbox;
6233   if(!dst) return NULL;
6234   /* initialize modified base64 decoding table */
6235   memset(base64, UNDEFINED, sizeof (base64));
6236   for (i = 0; i < sizeof (base64chars); ++i) {
6237     base64[(unsigned)base64chars[i]] = i;
6238   }
6239
6240   /* loop until end of string */
6241   while (*src != '\0') {
6242     c = *src++;
6243     /* deal with literal characters and &- */
6244     if (c != '&' || *src == '-') {
6245       /* encode literally */
6246       if (change_spaces && c == '_')
6247         *dst++ = ' ';
6248       else
6249         *dst++ = c;
6250       /* skip over the '-' if this is an &- sequence */
6251       if (c == '&') ++src;
6252     } else {
6253       /* convert modified UTF-7 -> UTF-16 -> UCS-4 -> UTF-8 -> HEX */
6254       bitbuf = 0;
6255       bitcount = 0;
6256       ucs4 = 0;
6257       while ((c = base64[(unsigned char) *src]) != UNDEFINED) {
6258         ++src;
6259         bitbuf = (bitbuf << 6) | c;
6260         bitcount += 6;
6261         /* enough bits for a UTF-16 character? */
6262         if (bitcount >= 16) {
6263           bitcount -= 16;
6264           utf16 = (bitcount ? bitbuf >> bitcount
6265                    : bitbuf) & 0xffff;
6266           /* convert UTF16 to UCS4 */
6267           if
6268             (utf16 >= UTF16HIGHSTART && utf16 <= UTF16HIGHEND) {
6269             ucs4 = (utf16 - UTF16HIGHSTART) << UTF16SHIFT;
6270             continue;
6271           } else if
6272             (utf16 >= UTF16LOSTART && utf16 <= UTF16LOEND) {
6273             ucs4 += utf16 - UTF16LOSTART + UTF16BASE;
6274           } else {
6275             ucs4 = utf16;
6276           }
6277
6278           /* convert UTF-16 range of UCS4 to UTF-8 */
6279           if (ucs4 <= 0x7fUL) {
6280             dst[0] = ucs4;
6281             dst += 1;
6282           } else if (ucs4 <= 0x7ffUL) {
6283             dst[0] = 0xc0 | (ucs4 >> 6);
6284             dst[1] = 0x80 | (ucs4 & 0x3f);
6285             dst += 2;
6286           } else if (ucs4 <= 0xffffUL) {
6287             dst[0] = 0xe0 | (ucs4 >> 12);
6288             dst[1] = 0x80 | ((ucs4 >> 6) & 0x3f);
6289             dst[2] = 0x80 | (ucs4 & 0x3f);
6290             dst += 3;
6291           } else {
6292             dst[0] = 0xf0 | (ucs4 >> 18);
6293             dst[1] = 0x80 | ((ucs4 >> 12) & 0x3f);
6294             dst[2] = 0x80 | ((ucs4 >> 6) & 0x3f);
6295             dst[3] = 0x80 | (ucs4 & 0x3f);
6296             dst += 4;
6297           }
6298         }
6299       }
6300       /* skip over trailing '-' in modified UTF-7 encoding */
6301       if (*src == '-') ++src;
6302     }
6303   }
6304   /* terminate destination string */
6305   *dst = '\0';
6306   return res;
6307 }
6308
6309 /* Convert hex coded UTF-8 string to modified UTF-7 IMAP mailbox
6310  *  dst should be about twice the length of src to deal with non-hex
6311  *  coded URLs
6312  */
6313 char* imap_utf8_to_modified_utf7(const char *src, gboolean change_spaces)
6314 {
6315   unsigned int utf8pos, utf8total, c, utf7mode, bitstogo, utf16flag;
6316   unsigned long ucs4 = 0, bitbuf = 0;
6317
6318   /* initialize hex lookup table */
6319   char *dst, *res;
6320
6321   if (!src) return NULL;
6322
6323   res = malloc(2*strlen(src)+1);
6324   dst = res;
6325   if(!dst) return NULL;
6326
6327   utf7mode = 0;
6328   utf8total = 0;
6329   bitstogo = 0;
6330   utf8pos = 0;
6331   while ((c = (unsigned char)*src) != '\0') {
6332     ++src;
6333     /* normal character? */
6334     if (c >= ' ' && c <= '~' && (c != '_' || !change_spaces)) {
6335       /* switch out of UTF-7 mode */
6336       if (utf7mode) {
6337         if (bitstogo) {
6338           *dst++ = base64chars[(bitbuf << (6 - bitstogo)) & 0x3F];
6339         }
6340         *dst++ = '-';
6341         utf7mode = 0;
6342         utf8pos  = 0;
6343         bitstogo = 0;
6344         utf8total= 0;
6345       }
6346       if (change_spaces && c == ' ')
6347         *dst++ = '_';
6348       else
6349         *dst++ = c;
6350       /* encode '&' as '&-' */
6351       if (c == '&') {
6352         *dst++ = '-';
6353       }
6354       continue;
6355     }
6356     /* switch to UTF-7 mode */
6357     if (!utf7mode) {
6358       *dst++ = '&';
6359       utf7mode = 1;
6360     }
6361     /* Encode US-ASCII characters as themselves */
6362     if (c < 0x80) {
6363       ucs4 = c;
6364     } else if (utf8total) {
6365       /* save UTF8 bits into UCS4 */
6366       ucs4 = (ucs4 << 6) | (c & 0x3FUL);
6367       if (++utf8pos < utf8total) {
6368         continue;
6369       }
6370     } else {
6371       utf8pos = 1;
6372       if (c < 0xE0) {
6373         utf8total = 2;
6374         ucs4 = c & 0x1F;
6375       } else if (c < 0xF0) {
6376         utf8total = 3;
6377         ucs4 = c & 0x0F;
6378       } else {
6379         /* NOTE: can't convert UTF8 sequences longer than 4 */
6380         utf8total = 4;
6381         ucs4 = c & 0x03;
6382       }
6383       continue;
6384     }
6385     /* loop to split ucs4 into two utf16 chars if necessary */
6386     utf8total = 0;
6387     do {
6388       if (ucs4 >= UTF16BASE) {
6389         ucs4 -= UTF16BASE;
6390         bitbuf = (bitbuf << 16) | ((ucs4 >> UTF16SHIFT)
6391                                    + UTF16HIGHSTART);
6392         ucs4 = (ucs4 & UTF16MASK) + UTF16LOSTART;
6393         utf16flag = 1;
6394       } else {
6395         bitbuf = (bitbuf << 16) | ucs4;
6396         utf16flag = 0;
6397       }
6398       bitstogo += 16;
6399       /* spew out base64 */
6400       while (bitstogo >= 6) {
6401         bitstogo -= 6;
6402         *dst++ = base64chars[(bitstogo ? (bitbuf >> bitstogo)
6403                               : bitbuf)
6404                              & 0x3F];
6405       }
6406     } while (utf16flag);
6407   }
6408   /* if in UTF-7 mode, finish in ASCII */
6409   if (utf7mode) {
6410     if (bitstogo) {
6411       *dst++ = base64chars[(bitbuf << (6 - bitstogo)) & 0x3F];
6412     }
6413     *dst++ = '-';
6414   }
6415   /* tie off string */
6416   *dst = '\0';
6417   return res;
6418 }