src/imap.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2007 Hiroyuki Yamamoto and the Claws Mail team
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #  include "config.h"
  22 #endif
  23
  24 #include "defs.h"
  25
  26 #include <glib.h>
  27 #include <glib/gi18n.h>
  28 #include <stdio.h>
  29 #include <string.h>
  30 #include "imap.h"
  31 #include "imap_gtk.h"
  32 #include "inc.h"
  33 #include "xml.h"
  34 #include "alertpanel.h"
  35
  36 #ifdef HAVE_LIBETPAN
  37
  38 #include <stdlib.h>
  39 #include <dirent.h>
  40 #include <unistd.h>
  41 #include <ctype.h>
  42 #include <time.h>
  43 #include <errno.h>
  44 #if HAVE_ICONV
  45 #  include <iconv.h>
  46 #endif
  47
  48 #if (defined(USE_OPENSSL) || defined (USE_GNUTLS))
  49 #  include "ssl.h"
  50 #endif
  51
  52 #include "folder.h"
  53 #include "session.h"
  54 #include "procmsg.h"
  55 #include "socket.h"
  56 #include "recv.h"
  57 #include "procheader.h"
  58 #include "prefs_account.h"
  59 #include "codeconv.h"
  60 #include "md5.h"
  61 #include "base64.h"
  62 #include "utils.h"
  63 #include "prefs_common.h"
  64 #include "inputdialog.h"
  65 #include "log.h"
  66 #include "remotefolder.h"
  67 #include "claws.h"
  68 #include "statusbar.h"
  69 #include "msgcache.h"
  70 #include "imap-thread.h"
  71 #include "account.h"
  72 #include "tags.h"
  73 #include "main.h"
  74
  75 typedef struct _IMAPFolder      IMAPFolder;
  76 typedef struct _IMAPSession     IMAPSession;
  77 typedef struct _IMAPNameSpace   IMAPNameSpace;
  78 typedef struct _IMAPFolderItem  IMAPFolderItem;
  79
  80 #include "prefs_account.h"
  81
  82 #define IMAP_FOLDER(obj)        ((IMAPFolder *)obj)
  83 #define IMAP_FOLDER_ITEM(obj)   ((IMAPFolderItem *)obj)
  84 #define IMAP_SESSION(obj)       ((IMAPSession *)obj)
  85
  86 struct _IMAPFolder
  87 {
  88         RemoteFolder rfolder;
  89
  90         /* list of IMAPNameSpace */
  91         GList *ns_personal;
  92         GList *ns_others;
  93         GList *ns_shared;
  94         gchar last_seen_separator;
  95         guint refcnt;
  96         guint max_set_size;
  97 };
  98
  99 struct _IMAPSession
 100 {
 101         Session session;
 102
 103         gboolean authenticated;
 104
 105         GSList *capability;
 106         gboolean uidplus;
 107
 108         gchar *mbox;
 109         guint cmd_count;
 110
 111         /* CLAWS */
 112         gboolean folder_content_changed;
 113         guint exists;
 114         guint recent;
 115         guint expunge;
 116         guint unseen;
 117         guint uid_validity;
 118         guint uid_next;
 119
 120         Folder * folder;
 121         gboolean busy;
 122         gboolean cancelled;
 123         gboolean sens_update_block;
 124 };
 125
 126 struct _IMAPNameSpace
 127 {
 128         gchar *name;
 129         gchar separator;
 130 };
 131
 132 #define IMAPBUFSIZE     8192
 133
 134 #define IMAP_IS_SEEN(flags)     ((flags & IMAP_FLAG_SEEN) != 0)
 135 #define IMAP_IS_ANSWERED(flags) ((flags & IMAP_FLAG_ANSWERED) != 0)
 136 #define IMAP_IS_FLAGGED(flags)  ((flags & IMAP_FLAG_FLAGGED) != 0)
 137 #define IMAP_IS_DELETED(flags)  ((flags & IMAP_FLAG_DELETED) != 0)
 138 #define IMAP_IS_DRAFT(flags)    ((flags & IMAP_FLAG_DRAFT) != 0)
 139 #define IMAP_IS_FORWARDED(flags)        ((flags & IMAP_FLAG_FORWARDED) != 0)
 140 #define IMAP_IS_SPAM(flags)     ((flags & IMAP_FLAG_SPAM) != 0)
 141 #define IMAP_IS_HAM(flags)      ((flags & IMAP_FLAG_HAM) != 0)
 142
 143
 144 #define IMAP4_PORT      143
 145 #if (defined(USE_OPENSSL) || defined (USE_GNUTLS))
 146 #define IMAPS_PORT      993
 147 #endif
 148
 149 #define IMAP_CMD_LIMIT  1000
 150
 151 enum {
 152         ITEM_CAN_CREATE_FLAGS_UNKNOWN = 0,
 153         ITEM_CAN_CREATE_FLAGS,
 154         ITEM_CANNOT_CREATE_FLAGS
 155 };
 156
 157 struct _IMAPFolderItem
 158 {
 159         FolderItem item;
 160
 161         guint lastuid;
 162         guint uid_next;
 163         GSList *uid_list;
 164         gboolean batching;
 165
 166         GHashTable *flags_set_table;
 167         GHashTable *flags_unset_table;
 168         guint32 last_change;
 169         guint32 last_sync;
 170         gboolean should_update;
 171         gboolean should_trash_cache;
 172         gint can_create_flags;
 173
 174         GHashTable *tags_set_table;
 175         GHashTable *tags_unset_table;
 176         GSList *ok_flags;
 177
 178 };
 179
 180 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item);
 181 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag);
 182
 183 static void imap_folder_init            (Folder         *folder,
 184                                          const gchar    *name,
 185                                          const gchar    *path);
 186
 187 static Folder   *imap_folder_new        (const gchar    *name,
 188                                          const gchar    *path);
 189 static void      imap_folder_destroy    (Folder         *folder);
 190
 191 static IMAPSession *imap_session_new    (Folder         *folder,
 192                                          const PrefsAccount     *account);
 193 static gint     imap_session_authenticate(IMAPSession           *session,
 194                                           const PrefsAccount    *account);
 195 static void     imap_session_destroy    (Session        *session);
 196
 197 static gchar   *imap_fetch_msg          (Folder         *folder,
 198                                          FolderItem     *item,
 199                                          gint            uid);
 200 static gchar   *imap_fetch_msg_full     (Folder         *folder,
 201                                          FolderItem     *item,
 202                                          gint            uid,
 203                                          gboolean        headers,
 204                                          gboolean        body);
 205 static void     imap_remove_cached_msg  (Folder         *folder,
 206                                          FolderItem     *item,
 207                                          MsgInfo        *msginfo);
 208 static gint     imap_add_msg            (Folder         *folder,
 209                                          FolderItem     *dest,
 210                                          const gchar    *file,
 211                                          MsgFlags       *flags);
 212 static gint     imap_add_msgs           (Folder         *folder,
 213                                          FolderItem     *dest,
 214                                          GSList         *file_list,
 215                                          GRelation      *relation);
 216
 217 static gint     imap_copy_msg           (Folder         *folder,
 218                                          FolderItem     *dest,
 219                                          MsgInfo        *msginfo);
 220 static gint     imap_copy_msgs          (Folder         *folder,
 221                                          FolderItem     *dest,
 222                                          MsgInfoList    *msglist,
 223                                          GRelation      *relation);
 224
 225 static gint     imap_remove_msg         (Folder         *folder,
 226                                          FolderItem     *item,
 227                                          gint            uid);
 228 static gint     imap_remove_msgs        (Folder         *folder,
 229                                          FolderItem     *dest,
 230                                          MsgInfoList    *msglist,
 231                                          GRelation      *relation);
 232 static gint     imap_remove_all_msg     (Folder         *folder,
 233                                          FolderItem     *item);
 234
 235 static gboolean imap_is_msg_changed     (Folder         *folder,
 236                                          FolderItem     *item,
 237                                          MsgInfo        *msginfo);
 238
 239 static gint     imap_close              (Folder         *folder,
 240                                          FolderItem     *item);
 241
 242 static gint     imap_scan_tree          (Folder         *folder);
 243
 244 static gint     imap_create_tree        (Folder         *folder);
 245
 246 static FolderItem *imap_create_folder   (Folder         *folder,
 247                                          FolderItem     *parent,
 248                                          const gchar    *name);
 249 static gint     imap_rename_folder      (Folder         *folder,
 250                                          FolderItem     *item,
 251                                          const gchar    *name);
 252 static gint     imap_remove_folder      (Folder         *folder,
 253                                          FolderItem     *item);
 254
 255 static FolderItem *imap_folder_item_new (Folder         *folder);
 256 static void imap_folder_item_destroy    (Folder         *folder,
 257                                          FolderItem     *item);
 258
 259 static IMAPSession *imap_session_get    (Folder         *folder);
 260
 261 static gint imap_auth                   (IMAPSession    *session,
 262                                          const gchar    *user,
 263                                          const gchar    *pass,
 264                                          IMAPAuthType    type);
 265
 266 static gint imap_scan_tree_recursive    (IMAPSession    *session,
 267                                          FolderItem     *item,
 268                                          gboolean        subs_only);
 269
 270 static void imap_create_missing_folders (Folder         *folder);
 271 static FolderItem *imap_create_special_folder
 272                                         (Folder                 *folder,
 273                                          SpecialFolderItemType   stype,
 274                                          const gchar            *name);
 275
 276 static gint imap_do_copy_msgs           (Folder         *folder,
 277                                          FolderItem     *dest,
 278                                          MsgInfoList    *msglist,
 279                                          GRelation      *relation);
 280
 281 static void imap_delete_all_cached_messages     (FolderItem     *item);
 282 static void imap_set_batch              (Folder         *folder,
 283                                          FolderItem     *item,
 284                                          gboolean        batch);
 285 static gint imap_set_message_flags      (IMAPSession    *session,
 286                                          IMAPFolderItem *item,
 287                                          MsgNumberList  *numlist,
 288                                          IMAPFlags       flags,
 289                                          GSList         *tags,
 290                                          gboolean        is_set);
 291 static gint imap_select                 (IMAPSession    *session,
 292                                          IMAPFolder     *folder,
 293                                          FolderItem     *item,
 294                                          gint           *exists,
 295                                          gint           *recent,
 296                                          gint           *unseen,
 297                                          guint32        *uid_validity,
 298                                          gint           *can_create_flags,
 299                                          gboolean        block);
 300 static gint imap_status                 (IMAPSession    *session,
 301                                          IMAPFolder     *folder,
 302                                          const gchar    *path,
 303                                          IMAPFolderItem *item,
 304                                          gint           *messages,
 305                                          guint32        *uid_next,
 306                                          guint32        *uid_validity,
 307                                          gint           *unseen,
 308                                          gboolean        block);
 309 static void     imap_commit_tags        (FolderItem     *item,
 310                                          MsgInfo        *msginfo,
 311                                          GSList         *set_tags,
 312                                          GSList         *unset_tags);
 313
 314 static gchar imap_get_path_separator            (IMAPSession    *session,
 315                                                  IMAPFolder     *folder,
 316                                                  const gchar    *path,
 317                                                  gint           *ok);
 318 static gchar *imap_get_real_path                (IMAPSession    *session,
 319                                                  IMAPFolder     *folder,
 320                                                  const gchar    *path,
 321                                                  gint           *ok);
 322 #ifdef HAVE_LIBETPAN
 323 static void imap_synchronise            (FolderItem     *item, gint days);
 324 #endif
 325 static gboolean imap_is_busy            (Folder *folder);
 326
 327 static void imap_free_capabilities      (IMAPSession    *session);
 328
 329 /* low-level IMAP4rev1 commands */
 330 static gint imap_cmd_login      (IMAPSession    *session,
 331                                  const gchar    *user,
 332                                  const gchar    *pass,
 333                                  const gchar    *type);
 334 static gint imap_cmd_noop       (IMAPSession    *session);
 335 #if (defined(USE_OPENSSL) || defined (USE_GNUTLS))
 336 static gint imap_cmd_starttls   (IMAPSession    *session);
 337 #endif
 338 static gint imap_cmd_select     (IMAPSession    *session,
 339                                  const gchar    *folder,
 340                                  gint           *exists,
 341                                  gint           *recent,
 342                                  gint           *unseen,
 343                                  guint32        *uid_validity,
 344                                  gint           *can_create_flags,
 345                                  GSList         **ok_flags,
 346                                  gboolean        block);
 347 static gint imap_cmd_close      (IMAPSession    *session);
 348 static gint imap_cmd_examine    (IMAPSession    *session,
 349                                  const gchar    *folder,
 350                                  gint           *exists,
 351                                  gint           *recent,
 352                                  gint           *unseen,
 353                                  guint32        *uid_validity,
 354                                  gboolean        block);
 355 static gint imap_cmd_create     (IMAPSession    *sock,
 356                                  const gchar    *folder);
 357 static gint imap_cmd_rename     (IMAPSession    *sock,
 358                                  const gchar    *oldfolder,
 359                                  const gchar    *newfolder);
 360 static gint imap_cmd_delete     (IMAPSession    *session,
 361                                  const gchar    *folder);
 362 static gint imap_cmd_fetch      (IMAPSession    *sock,
 363                                  guint32         uid,
 364                                  const gchar    *filename,
 365                                  gboolean        headers,
 366                                  gboolean        body);
 367 static gint imap_cmd_append     (IMAPSession    *session,
 368                                  IMAPFolderItem *item,
 369                                  const gchar    *destfolder,
 370                                  const gchar    *file,
 371                                  IMAPFlags       flags,
 372                                  guint32        *new_uid);
 373 static gint imap_cmd_copy       (IMAPSession *session,
 374                                  struct mailimap_set * set,
 375                                  const gchar *destfolder,
 376                                  GRelation *uid_mapping,
 377                                  struct mailimap_set ** source,
 378                                  struct mailimap_set ** dest);
 379 static gint imap_cmd_store      (IMAPSession    *session,
 380                                  IMAPFolderItem *item,
 381                                  struct mailimap_set * set,
 382                                  IMAPFlags flags,
 383                                  GSList *tags,
 384                                  int do_add);
 385 static gint imap_cmd_expunge    (IMAPSession    *session);
 386
 387 static void imap_path_separator_subst           (gchar          *str,
 388                                                  gchar           separator);
 389
 390 static gboolean imap_rename_folder_func         (GNode          *node,
 391                                                  gpointer        data);
 392 static gint imap_get_num_list                   (Folder         *folder,
 393                                                  FolderItem     *item,
 394                                                  GSList        **list,
 395                                                  gboolean       *old_uids_valid);
 396 static GSList *imap_get_msginfos                (Folder         *folder,
 397                                                  FolderItem     *item,
 398                                                  GSList         *msgnum_list);
 399 static MsgInfo *imap_get_msginfo                (Folder         *folder,
 400                                                  FolderItem     *item,
 401                                                  gint            num);
 402 static gboolean imap_scan_required              (Folder         *folder,
 403                                                  FolderItem     *item);
 404 static void imap_change_flags                   (Folder         *folder,
 405                                                  FolderItem     *item,
 406                                                  MsgInfo        *msginfo,
 407                                                  MsgPermFlags    newflags);
 408 static gint imap_get_flags                      (Folder         *folder,
 409                                                  FolderItem     *item,
 410                                                  MsgInfoList    *msglist,
 411                                                  GRelation      *msgflags);
 412 static gchar *imap_folder_get_path              (Folder         *folder);
 413 static gchar *imap_item_get_path                (Folder         *folder,
 414                                                  FolderItem     *item);
 415 static MsgInfo *imap_parse_msg(const gchar *file, FolderItem *item);
 416
 417
 418 /* data types conversion libetpan <-> claws */
 419 static GSList * imap_list_from_lep(IMAPFolder * folder,
 420                                    clist * list, const gchar * real_path, gboolean all);
 421 static GSList * imap_get_lep_set_from_numlist(IMAPFolder *folder, MsgNumberList *numlist);
 422 static GSList * imap_get_lep_set_from_msglist(IMAPFolder *folder, MsgInfoList *msglist);
 423 static GSList * imap_uid_list_from_lep(clist * list);
 424 static GSList * imap_uid_list_from_lep_tab(carray * list);
 425 static void imap_flags_hash_from_lep_uid_flags_tab(carray * list,
 426                                                    GHashTable * hash,
 427                                                    GHashTable *tags_hash);
 428 static MsgInfo *imap_envelope_from_lep(struct imap_fetch_env_info * info,
 429                                        FolderItem *item);
 430 static void imap_lep_set_free(GSList *seq_list);
 431 static struct mailimap_flag_list * imap_flag_to_lep(IMAPFolderItem *item, IMAPFlags flags, GSList *tags);
 432
 433 typedef struct _hashtable_data {
 434         GSList *msglist;
 435         IMAPFolderItem *item;
 436 } hashtable_data;
 437
 438 static FolderClass imap_class;
 439
 440 FolderClass *imap_get_class(void)
 441 {
 442         if (imap_class.idstr == NULL) {
 443                 imap_class.type = F_IMAP;
 444                 imap_class.idstr = "imap";
 445                 imap_class.uistr = "IMAP4";
 446
 447                 /* Folder functions */
 448                 imap_class.new_folder = imap_folder_new;
 449                 imap_class.destroy_folder = imap_folder_destroy;
 450                 imap_class.scan_tree = imap_scan_tree;
 451                 imap_class.create_tree = imap_create_tree;
 452
 453                 /* FolderItem functions */
 454                 imap_class.item_new = imap_folder_item_new;
 455                 imap_class.item_destroy = imap_folder_item_destroy;
 456                 imap_class.item_get_path = imap_item_get_path;
 457                 imap_class.create_folder = imap_create_folder;
 458                 imap_class.rename_folder = imap_rename_folder;
 459                 imap_class.remove_folder = imap_remove_folder;
 460                 imap_class.close = imap_close;
 461                 imap_class.get_num_list = imap_get_num_list;
 462                 imap_class.scan_required = imap_scan_required;
 463                 imap_class.set_xml = folder_set_xml;
 464                 imap_class.get_xml = folder_get_xml;
 465                 imap_class.item_set_xml = imap_item_set_xml;
 466                 imap_class.item_get_xml = imap_item_get_xml;
 467
 468                 /* Message functions */
 469                 imap_class.get_msginfo = imap_get_msginfo;
 470                 imap_class.get_msginfos = imap_get_msginfos;
 471                 imap_class.fetch_msg = imap_fetch_msg;
 472                 imap_class.fetch_msg_full = imap_fetch_msg_full;
 473                 imap_class.add_msg = imap_add_msg;
 474                 imap_class.add_msgs = imap_add_msgs;
 475                 imap_class.copy_msg = imap_copy_msg;
 476                 imap_class.copy_msgs = imap_copy_msgs;
 477                 imap_class.remove_msg = imap_remove_msg;
 478                 imap_class.remove_msgs = imap_remove_msgs;
 479                 imap_class.remove_all_msg = imap_remove_all_msg;
 480                 imap_class.is_msg_changed = imap_is_msg_changed;
 481                 imap_class.change_flags = imap_change_flags;
 482                 imap_class.get_flags = imap_get_flags;
 483                 imap_class.set_batch = imap_set_batch;
 484                 imap_class.synchronise = imap_synchronise;
 485                 imap_class.remove_cached_msg = imap_remove_cached_msg;
 486                 imap_class.commit_tags = imap_commit_tags;
 487 #ifdef USE_PTREAD
 488                 pthread_mutex_init(&imap_mutex, NULL);
 489 #endif
 490         }
 491
 492         return &imap_class;
 493 }
 494
 495 static void imap_refresh_sensitivity (IMAPSession *session)
 496 {
 497         MainWindow *mainwin;
 498
 499         if (session->sens_update_block)
 500                 return;
 501         mainwin = mainwindow_get_mainwindow();
 502         if (mainwin) {
 503                 toolbar_main_set_sensitive(mainwin);
 504                 main_window_set_menu_sensitive(mainwin);
 505         }
 506 }
 507
 508 static void lock_session(IMAPSession *session)
 509 {
 510         if (session) {
 511                 debug_print("locking session %p (%d)\n", session, session->busy);
 512                 if (session->busy)
 513                         debug_print("         SESSION WAS LOCKED !!      \n");
 514                 session->busy = TRUE;
 515                 imap_refresh_sensitivity(session);
 516         } else {
 517                 debug_print("can't lock null session\n");
 518         }
 519 }
 520
 521 static void unlock_session(IMAPSession *session)
 522 {
 523         if (session) {
 524                 debug_print("unlocking session %p\n", session);
 525                 session->busy = FALSE;
 526                 imap_refresh_sensitivity(session);
 527         } else {
 528                 debug_print("can't unlock null session\n");
 529         }
 530 }
 531
 532 static void imap_disc_session_destroy(IMAPSession *session)
 533 {
 534         RemoteFolder *rfolder = REMOTE_FOLDER(IMAP_SESSION(session)->folder);
 535
 536         if (!rfolder)
 537                 return;
 538         if (!session)
 539                 return;
 540         log_warning(LOG_PROTOCOL, _("IMAP4 connection broken\n"));
 541         SESSION(session)->state = SESSION_DISCONNECTED;
 542         SESSION(session)->sock = NULL;
 543 }
 544
 545 static gboolean is_fatal(int libetpan_errcode)
 546 {
 547         switch(libetpan_errcode) {
 548         case MAILIMAP_ERROR_STREAM:
 549         case MAILIMAP_ERROR_PROTOCOL:
 550         case MAILIMAP_ERROR_PARSE:
 551         case MAILIMAP_ERROR_BAD_STATE:
 552                 return TRUE;
 553         default:
 554                 return FALSE;
 555         }
 556 }
 557
 558 static void imap_handle_error(Session *session, int libetpan_errcode)
 559 {
 560         switch(libetpan_errcode) {
 561         case MAILIMAP_NO_ERROR:
 562                 return;
 563         case MAILIMAP_NO_ERROR_AUTHENTICATED:
 564                 log_warning(LOG_PROTOCOL, _("IMAP error: authenticated\n"));
 565                 break;
 566         case MAILIMAP_NO_ERROR_NON_AUTHENTICATED:
 567                 log_warning(LOG_PROTOCOL, _("IMAP error: not authenticated\n"));
 568                 break;
 569         case MAILIMAP_ERROR_BAD_STATE:
 570                 log_warning(LOG_PROTOCOL, _("IMAP error: bad state\n"));
 571                 break;
 572         case MAILIMAP_ERROR_STREAM:
 573                 log_warning(LOG_PROTOCOL, _("IMAP error: stream error\n"));
 574                 break;
 575         case MAILIMAP_ERROR_PARSE:
 576                 log_warning(LOG_PROTOCOL, _("IMAP error: parse error "
 577                                             "(very probably non-RFC compliance from the server)\n"));
 578                 break;
 579         case MAILIMAP_ERROR_CONNECTION_REFUSED:
 580                 log_warning(LOG_PROTOCOL, _("IMAP error: connection refused\n"));
 581                 break;
 582         case MAILIMAP_ERROR_MEMORY:
 583                 log_warning(LOG_PROTOCOL, _("IMAP error: memory error\n"));
 584                 break;
 585         case MAILIMAP_ERROR_FATAL:
 586                 log_warning(LOG_PROTOCOL, _("IMAP error: fatal error\n"));
 587                 break;
 588         case MAILIMAP_ERROR_PROTOCOL:
 589                 log_warning(LOG_PROTOCOL, _("IMAP error: protocol error"
 590                                             "(very probably non-RFC compliance from the server)\n"));
 591                 break;
 592         case MAILIMAP_ERROR_DONT_ACCEPT_CONNECTION:
 593                 log_warning(LOG_PROTOCOL, _("IMAP error: connection not accepted\n"));
 594                 break;
 595         case MAILIMAP_ERROR_APPEND:
 596                 log_warning(LOG_PROTOCOL, _("IMAP error: APPEND error\n"));
 597                 break;
 598         case MAILIMAP_ERROR_NOOP:
 599                 log_warning(LOG_PROTOCOL, _("IMAP error: NOOP error\n"));
 600                 break;
 601         case MAILIMAP_ERROR_LOGOUT:
 602                 log_warning(LOG_PROTOCOL, _("IMAP error: LOGOUT error\n"));
 603                 break;
 604         case MAILIMAP_ERROR_CAPABILITY:
 605                 log_warning(LOG_PROTOCOL, _("IMAP error: CAPABILITY error\n"));
 606                 break;
 607         case MAILIMAP_ERROR_CHECK:
 608                 log_warning(LOG_PROTOCOL, _("IMAP error: CHECK error\n"));
 609                 break;
 610         case MAILIMAP_ERROR_CLOSE:
 611                 log_warning(LOG_PROTOCOL, _("IMAP error: CLOSE error\n"));
 612                 break;
 613         case MAILIMAP_ERROR_EXPUNGE:
 614                 log_warning(LOG_PROTOCOL, _("IMAP error: EXPUNGE error\n"));
 615                 break;
 616         case MAILIMAP_ERROR_COPY:
 617                 log_warning(LOG_PROTOCOL, _("IMAP error: COPY error\n"));
 618                 break;
 619         case MAILIMAP_ERROR_UID_COPY:
 620                 log_warning(LOG_PROTOCOL, _("IMAP error: UID COPY error\n"));
 621                 break;
 622         case MAILIMAP_ERROR_CREATE:
 623                 log_warning(LOG_PROTOCOL, _("IMAP error: CREATE error\n"));
 624                 break;
 625         case MAILIMAP_ERROR_DELETE:
 626                 log_warning(LOG_PROTOCOL, _("IMAP error: DELETE error\n"));
 627                 break;
 628         case MAILIMAP_ERROR_EXAMINE:
 629                 log_warning(LOG_PROTOCOL, _("IMAP error: EXAMINE error\n"));
 630                 break;
 631         case MAILIMAP_ERROR_FETCH:
 632                 log_warning(LOG_PROTOCOL, _("IMAP error: FETCH error\n"));
 633                 break;
 634         case MAILIMAP_ERROR_UID_FETCH:
 635                 log_warning(LOG_PROTOCOL, _("IMAP error: UID FETCH error\n"));
 636                 break;
 637         case MAILIMAP_ERROR_LIST:
 638                 log_warning(LOG_PROTOCOL, _("IMAP error: LIST error\n"));
 639                 break;
 640         case MAILIMAP_ERROR_LOGIN:
 641                 log_warning(LOG_PROTOCOL, _("IMAP error: LOGIN error\n"));
 642                 break;
 643         case MAILIMAP_ERROR_LSUB:
 644                 log_warning(LOG_PROTOCOL, _("IMAP error: LSUB error\n"));
 645                 break;
 646         case MAILIMAP_ERROR_RENAME:
 647                 log_warning(LOG_PROTOCOL, _("IMAP error: RENAME error\n"));
 648                 break;
 649         case MAILIMAP_ERROR_SEARCH:
 650                 log_warning(LOG_PROTOCOL, _("IMAP error: SEARCH error\n"));
 651                 break;
 652         case MAILIMAP_ERROR_UID_SEARCH:
 653                 log_warning(LOG_PROTOCOL, _("IMAP error: UID SEARCH error\n"));
 654                 break;
 655         case MAILIMAP_ERROR_SELECT:
 656                 log_warning(LOG_PROTOCOL, _("IMAP error: SELECT error\n"));
 657                 break;
 658         case MAILIMAP_ERROR_STATUS:
 659                 log_warning(LOG_PROTOCOL, _("IMAP error: STATUS error\n"));
 660                 break;
 661         case MAILIMAP_ERROR_STORE:
 662                 log_warning(LOG_PROTOCOL, _("IMAP error: STORE error\n"));
 663                 break;
 664         case MAILIMAP_ERROR_UID_STORE:
 665                 log_warning(LOG_PROTOCOL, _("IMAP error: UID STORE error\n"));
 666                 break;
 667         case MAILIMAP_ERROR_SUBSCRIBE:
 668                 log_warning(LOG_PROTOCOL, _("IMAP error: SUBSCRIBE error\n"));
 669                 break;
 670         case MAILIMAP_ERROR_UNSUBSCRIBE:
 671                 log_warning(LOG_PROTOCOL, _("IMAP error: UNSUBSCRIBE error\n"));
 672                 break;
 673         case MAILIMAP_ERROR_STARTTLS:
 674                 log_warning(LOG_PROTOCOL, _("IMAP error: STARTTLS error\n"));
 675                 break;
 676         case MAILIMAP_ERROR_INVAL:
 677                 log_warning(LOG_PROTOCOL, _("IMAP error: INVAL error\n"));
 678                 break;
 679         case MAILIMAP_ERROR_EXTENSION:
 680                 log_warning(LOG_PROTOCOL, _("IMAP error: EXTENSION error\n"));
 681                 break;
 682         case MAILIMAP_ERROR_SASL:
 683                 log_warning(LOG_PROTOCOL, _("IMAP error: SASL error\n"));
 684                 break;
 685 #if (defined(USE_OPENSSL) || defined (USE_GNUTLS))
 686         case MAILIMAP_ERROR_SSL:
 687                 log_warning(LOG_PROTOCOL, _("IMAP error: SSL error\n"));
 688                 break;
 689 #endif
 690         default:
 691                 log_warning(LOG_PROTOCOL, _("IMAP error: Unknown error [%d]\n"),
 692                         libetpan_errcode);
 693                 break;
 694         }
 695
 696         if (session && is_fatal(libetpan_errcode)) {
 697                 imap_disc_session_destroy(IMAP_SESSION(session));
 698         } else if (session && !is_fatal(libetpan_errcode)) {
 699                 if (IMAP_SESSION(session)->busy)
 700                         unlock_session(IMAP_SESSION(session));
 701         }
 702 }
 703
 704 static Folder *imap_folder_new(const gchar *name, const gchar *path)
 705 {
 706         Folder *folder;
 707
 708         folder = (Folder *)g_new0(IMAPFolder, 1);
 709         folder->klass = &imap_class;
 710         imap_folder_init(folder, name, path);
 711
 712         return folder;
 713 }
 714
 715 static void imap_folder_destroy(Folder *folder)
 716 {
 717         while (imap_folder_get_refcnt(folder) > 0)
 718                 gtk_main_iteration();
 719
 720         folder_remote_folder_destroy(REMOTE_FOLDER(folder));
 721         imap_done(folder);
 722 }
 723
 724 static void imap_folder_init(Folder *folder, const gchar *name,
 725                              const gchar *path)
 726 {
 727         folder_remote_folder_init((Folder *)folder, name, path);
 728         IMAP_FOLDER(folder)->max_set_size = IMAP_SET_MAX_COUNT;
 729 }
 730
 731 static FolderItem *imap_folder_item_new(Folder *folder)
 732 {
 733         IMAPFolderItem *item;
 734
 735         item = g_new0(IMAPFolderItem, 1);
 736         item->lastuid = 0;
 737         item->uid_next = 0;
 738         item->uid_list = NULL;
 739
 740         return (FolderItem *)item;
 741 }
 742
 743 static void imap_folder_item_destroy(Folder *folder, FolderItem *_item)
 744 {
 745         IMAPFolderItem *item = (IMAPFolderItem *)_item;
 746
 747         g_return_if_fail(item != NULL);
 748         g_slist_free(item->uid_list);
 749
 750         g_free(_item);
 751 }
 752
 753 static gboolean imap_reset_uid_lists_func(GNode *node, gpointer data)
 754 {
 755         IMAPFolderItem *item = (IMAPFolderItem *)node->data;
 756
 757         item->lastuid = 0;
 758         g_slist_free(item->uid_list);
 759         item->uid_list = NULL;
 760
 761         return FALSE;
 762 }
 763
 764 static void imap_reset_uid_lists(Folder *folder)
 765 {
 766         if(folder->node == NULL)
 767                 return;
 768
 769         /* Destroy all uid lists and rest last uid */
 770         g_node_traverse(folder->node, G_IN_ORDER, G_TRAVERSE_ALL, -1, imap_reset_uid_lists_func, NULL);
 771 }
 772
 773 static int imap_get_capabilities(IMAPSession *session)
 774 {
 775         struct mailimap_capability_data *capabilities = NULL;
 776         clistiter *cur;
 777         int result = -1;
 778
 779         if (session->capability != NULL)
 780                 return MAILIMAP_NO_ERROR;
 781
 782         capabilities = imap_threaded_capability(session->folder, &result);
 783
 784         if (result != MAILIMAP_NO_ERROR) {
 785                 return result;
 786         }
 787
 788         if (capabilities == NULL) {
 789                 return MAILIMAP_NO_ERROR;
 790         }
 791
 792         for(cur = clist_begin(capabilities->cap_list) ; cur != NULL ;
 793             cur = clist_next(cur)) {
 794                 struct mailimap_capability * cap =
 795                         clist_content(cur);
 796                 if (!cap || cap->cap_data.cap_name == NULL)
 797                         continue;
 798                 session->capability = g_slist_append
 799                                 (session->capability,
 800                                  g_strdup(cap->cap_data.cap_name));
 801                 debug_print("got capa %s\n", cap->cap_data.cap_name);
 802         }
 803         mailimap_capability_data_free(capabilities);
 804         return MAILIMAP_NO_ERROR;
 805 }
 806
 807 static gboolean imap_has_capability(IMAPSession *session, const gchar *cap)
 808 {
 809         GSList *cur;
 810         for (cur = session->capability; cur; cur = cur->next) {
 811                 if (!g_ascii_strcasecmp(cur->data, cap))
 812                         return TRUE;
 813         }
 814         return FALSE;
 815 }
 816
 817 static gint imap_auth(IMAPSession *session, const gchar *user, const gchar *pass,
 818                       IMAPAuthType type)
 819 {
 820         gint ok = MAILIMAP_ERROR_LOGIN;
 821         static time_t last_login_err = 0;
 822         gchar *ext_info = "";
 823         int r;
 824         gchar *server = NULL;
 825         if ((r = imap_get_capabilities(session)) != MAILIMAP_NO_ERROR) {
 826                 imap_handle_error(SESSION(session), r);
 827                 return r;
 828         }
 829         server = g_strdup(SESSION(session)->server);
 830         switch(type) {
 831         case IMAP_AUTH_ANON:
 832                 ok = imap_cmd_login(session, user, pass, "ANONYMOUS");
 833                 break;
 834         case IMAP_AUTH_CRAM_MD5:
 835                 ok = imap_cmd_login(session, user, pass, "CRAM-MD5");
 836                 break;
 837         case IMAP_AUTH_DIGEST_MD5:
 838                 ok = imap_cmd_login(session, user, pass, "DIGEST-MD5");
 839                 break;
 840         case IMAP_AUTH_LOGIN:
 841                 ok = imap_cmd_login(session, user, pass, "LOGIN");
 842                 break;
 843         case IMAP_AUTH_GSSAPI:
 844                 ok = imap_cmd_login(session, user, pass, "GSSAPI");
 845                 break;
 846         default:
 847                 debug_print("capabilities:\n"
 848                                 "\t ANONYMOUS %d\n"
 849                                 "\t CRAM-MD5 %d\n"
 850                                 "\t DIGEST-MD5 %d\n"
 851                                 "\t LOGIN %d\n"
 852                                 "\t GSSAPI %d\n",
 853                         imap_has_capability(session, "ANONYMOUS"),
 854                         imap_has_capability(session, "CRAM-MD5"),
 855                         imap_has_capability(session, "DIGEST-MD5"),
 856                         imap_has_capability(session, "LOGIN"),
 857                         imap_has_capability(session, "GSSAPI"));
 858                 if (imap_has_capability(session, "CRAM-MD5"))
 859                         ok = imap_cmd_login(session, user, pass, "CRAM-MD5");
 860                 if (ok == MAILIMAP_ERROR_LOGIN && imap_has_capability(session, "DIGEST-MD5"))
 861                         ok = imap_cmd_login(session, user, pass, "DIGEST-MD5");
 862                 if (ok == MAILIMAP_ERROR_LOGIN && imap_has_capability(session, "GSSAPI"))
 863                         ok = imap_cmd_login(session, user, pass, "GSSAPI");
 864                 if (ok == MAILIMAP_ERROR_LOGIN) /* we always try LOGIN before giving up */
 865                         ok = imap_cmd_login(session, user, pass, "LOGIN");
 866         }
 867
 868         if (ok == MAILIMAP_NO_ERROR)
 869                 session->authenticated = TRUE;
 870         else {
 871                 if (type == IMAP_AUTH_CRAM_MD5) {
 872                         ext_info = _("\n\nCRAM-MD5 logins only work if libetpan has been "
 873                                      "compiled with SASL support and the "
 874                                      "CRAM-MD5 SASL plugin is installed.");
 875                 }
 876
 877                 if (type == IMAP_AUTH_DIGEST_MD5) {
 878                         ext_info = _("\n\nDIGEST-MD5 logins only work if libetpan has been "
 879                                      "compiled with SASL support and the "
 880                                      "DIGEST-MD5 SASL plugin is installed.");
 881                 }
 882
 883                 if (time(NULL) - last_login_err > 10) {
 884                         if (!prefs_common.no_recv_err_panel) {
 885                                 alertpanel_error_log(_("Connection to %s failed: "
 886                                         "login refused.%s"),
 887                                         server, ext_info);
 888                         } else {
 889                                 log_error(LOG_PROTOCOL, _("Connection to %s failed: "
 890                                         "login refused.%s\n"),
 891                                         server, ext_info);
 892                         }
 893                 }
 894                 last_login_err = time(NULL);
 895         }
 896         g_free(server);
 897         return ok;
 898 }
 899
 900 static IMAPSession *imap_reconnect_if_possible(Folder *folder, IMAPSession *session)
 901 {
 902         RemoteFolder *rfolder = REMOTE_FOLDER(folder);
 903         /* Check if this is the first try to establish a
 904            connection, if yes we don't try to reconnect */
 905         debug_print("reconnecting\n");
 906         if (rfolder->session == NULL) {
 907                 log_warning(LOG_PROTOCOL, _("Connecting to %s failed"),
 908                             folder->account->recv_server);
 909                 SESSION(session)->sock = NULL;
 910                 session_destroy(SESSION(session));
 911                 session = NULL;
 912         } else {
 913                 rfolder->session = NULL;
 914                 log_warning(LOG_PROTOCOL, _("IMAP4 connection to %s has been"
 915                             " disconnected. Reconnecting...\n"),
 916                             folder->account->recv_server);
 917                 statusbar_print_all(_("IMAP4 connection to %s has been"
 918                             " disconnected. Reconnecting...\n"),
 919                             folder->account->recv_server);
 920                 SESSION(session)->state = SESSION_DISCONNECTED;
 921                 SESSION(session)->sock = NULL;
 922                 session_destroy(SESSION(session));
 923                 /* Clear folders session to make imap_session_get create
 924                    a new session, because of rfolder->session == NULL
 925                    it will not try to reconnect again and so avoid an
 926                    endless loop */
 927                 debug_print("getting session...\n");
 928                 session = imap_session_get(folder);
 929                 rfolder->session = SESSION(session);
 930                 statusbar_pop_all();
 931         }
 932         return session;
 933 }
 934
 935 static IMAPSession *imap_session_get(Folder *folder)
 936 {
 937         RemoteFolder *rfolder = REMOTE_FOLDER(folder);
 938         IMAPSession *session = NULL;
 939         gint r = MAILIMAP_NO_ERROR;
 940
 941         g_return_val_if_fail(folder != NULL, NULL);
 942         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, NULL);
 943         g_return_val_if_fail(folder->account != NULL, NULL);
 944
 945         if (prefs_common.work_offline &&
 946             !inc_offline_should_override(FALSE,
 947                 _("Claws Mail needs network access in order "
 948                   "to access the IMAP server."))) {
 949                 return NULL;
 950         }
 951
 952         /* Make sure we have a session */
 953         if (rfolder->session != NULL && rfolder->session->state != SESSION_DISCONNECTED) {
 954                 session = IMAP_SESSION(rfolder->session);
 955         } else if (rfolder->session != NULL && rfolder->session->state == SESSION_DISCONNECTED) {
 956                 session_destroy(SESSION(rfolder->session));
 957                 rfolder->session = NULL;
 958                 goto new_conn;
 959         } else if (rfolder->connecting) {
 960                 debug_print("already connecting\n");
 961                 return NULL;
 962         } else {
 963 new_conn:
 964                 imap_reset_uid_lists(folder);
 965                 if (time(NULL) - rfolder->last_failure <= 2)
 966                         return NULL;
 967                 rfolder->connecting = TRUE;
 968                 session = imap_session_new(folder, folder->account);
 969         }
 970         if(session == NULL) {
 971                 rfolder->last_failure = time(NULL);
 972                 rfolder->connecting = FALSE;
 973                 return NULL;
 974         }
 975
 976         /* Make sure session is authenticated */
 977         if (!IMAP_SESSION(session)->authenticated)
 978                 r = imap_session_authenticate(IMAP_SESSION(session), folder->account);
 979
 980         if (r != MAILIMAP_NO_ERROR || (!is_fatal(r) && !IMAP_SESSION(session)->authenticated)) {
 981                 rfolder->session = NULL;
 982                 if (!is_fatal(r)) {
 983                         imap_threaded_disconnect(session->folder);
 984                         SESSION(session)->state = SESSION_DISCONNECTED;
 985                         SESSION(session)->sock = NULL;
 986                         session_destroy(SESSION(session));
 987                 }
 988                 rfolder->last_failure = time(NULL);
 989                 rfolder->connecting = FALSE;
 990                 return NULL;
 991         }
 992
 993         /* I think the point of this code is to avoid sending a
 994          * keepalive if we've used the session recently and therefore
 995          * think it's still alive.  Unfortunately, most of the code
 996          * does not yet check for errors on the socket, and so if the
 997          * connection drops we don't notice until the timeout expires.
 998          * A better solution than sending a NOOP every time would be
 999          * for every command to be prepared to retry until it is
1000          * successfully sent. -- mbp */
1001         if ((time(NULL) - SESSION(session)->last_access_time > SESSION_TIMEOUT_INTERVAL) || session->cancelled) {
1002                 /* verify that the session is still alive */
1003                 if ((r = imap_cmd_noop(session)) != MAILIMAP_NO_ERROR) {
1004                         debug_print("disconnected!\n");
1005                         if (!is_fatal(r))
1006                                 session = imap_reconnect_if_possible(folder, session);
1007                         else {
1008                                 rfolder->session = NULL;
1009                                 rfolder->connecting = FALSE;
1010                                 session = imap_session_get(folder);
1011                         }
1012                 }
1013                 if (session)
1014                         session->cancelled = FALSE;
1015         }
1016
1017         rfolder->session = SESSION(session);
1018         rfolder->connecting = FALSE;
1019
1020         return IMAP_SESSION(session);
1021 }
1022
1023 static IMAPSession *imap_session_new(Folder * folder,
1024                                      const PrefsAccount *account)
1025 {
1026         IMAPSession *session;
1027         gushort port;
1028         int r;
1029         int authenticated = FALSE;
1030
1031 #if (defined(USE_OPENSSL) || defined (USE_GNUTLS))
1032         /* FIXME: IMAP over SSL only... */
1033         SSLType ssl_type;
1034
1035         port = account->set_imapport ? account->imapport
1036                 : account->ssl_imap == SSL_TUNNEL ? IMAPS_PORT : IMAP4_PORT;
1037         ssl_type = account->ssl_imap;
1038 #else
1039         if (account->ssl_imap != SSL_NONE) {
1040                 if (alertpanel_full(_("Insecure connection"),
1041                         _("This connection is configured to be secured "
1042                           "using SSL, but SSL is not available in this "
1043                           "build of Claws Mail. \n\n"
1044                           "Do you want to continue connecting to this "
1045                           "server? The communication would not be "
1046                           "secure."),
1047                           GTK_STOCK_CANCEL, _("Con_tinue connecting"),
1048                           NULL, FALSE, NULL, ALERT_WARNING,
1049                           G_ALERTDEFAULT) != G_ALERTALTERNATE)
1050                         return NULL;
1051         }
1052         port = account->set_imapport ? account->imapport
1053                 : IMAP4_PORT;
1054 #endif
1055
1056         imap_init(folder);
1057         statuswindow_print_all(_("Connecting to IMAP4 server: %s..."), folder->account->recv_server);
1058 #ifndef G_OS_WIN32
1059         if (account->set_tunnelcmd) {
1060                 r = imap_threaded_connect_cmd(folder,
1061                                               account->tunnelcmd,
1062                                               account->recv_server,
1063                                               port);
1064         }
1065         else
1066 #endif
1067         {
1068 #if (defined(USE_OPENSSL) || defined (USE_GNUTLS))
1069                 if (ssl_type == SSL_TUNNEL) {
1070                         r = imap_threaded_connect_ssl(folder,
1071                                                       account->recv_server,
1072                                                       port);
1073                 }
1074                 else
1075 #endif
1076                 {
1077                         r = imap_threaded_connect(folder,
1078                                                   account->recv_server,
1079                                                   port);
1080                 }
1081         }
1082
1083         statuswindow_pop_all();
1084         if (r == MAILIMAP_NO_ERROR_AUTHENTICATED) {
1085                 authenticated = TRUE;
1086         }
1087         else if (r == MAILIMAP_NO_ERROR_NON_AUTHENTICATED) {
1088                 authenticated = FALSE;
1089         }
1090         else {
1091 #if (defined(USE_OPENSSL) || defined (USE_GNUTLS))
1092                 if (r == MAILIMAP_ERROR_SSL)
1093                         log_error(LOG_PROTOCOL, _("SSL handshake failed\n"));
1094                 else
1095 #endif
1096                         imap_handle_error(NULL, r);
1097
1098                 if(!prefs_common.no_recv_err_panel) {
1099                         alertpanel_error_log(_("Can't connect to IMAP4 server: %s:%d"),
1100                                          account->recv_server, port);
1101                 } else {
1102                         log_error(LOG_PROTOCOL, _("Can't connect to IMAP4 server: %s:%d\n"),
1103                                          account->recv_server, port);
1104                 }
1105
1106                 return NULL;
1107         }
1108
1109         session = g_new0(IMAPSession, 1);
1110         session_init(SESSION(session), account, FALSE);
1111         SESSION(session)->type             = SESSION_IMAP;
1112         SESSION(session)->server           = g_strdup(account->recv_server);
1113         SESSION(session)->port             = port;
1114         SESSION(session)->sock             = NULL;
1115
1116         SESSION(session)->destroy          = imap_session_destroy;
1117
1118         session->capability = NULL;
1119
1120         session->authenticated = authenticated;
1121         session->mbox = NULL;
1122         session->exists = 0;
1123         session->recent = 0;
1124         session->expunge = 0;
1125         session->cmd_count = 0;
1126         session->folder = folder;
1127         IMAP_FOLDER(session->folder)->last_seen_separator = 0;
1128
1129 #if (defined(USE_OPENSSL) || defined (USE_GNUTLS))
1130         if (account->ssl_imap == SSL_STARTTLS) {
1131                 gint ok;
1132
1133                 ok = imap_cmd_starttls(session);
1134                 if (ok != MAILIMAP_NO_ERROR) {
1135                         log_warning(LOG_PROTOCOL, _("Can't start TLS session.\n"));
1136                         if (!is_fatal(ok)) {
1137                                 SESSION(session)->sock = NULL;
1138                                 session_destroy(SESSION(session));
1139                         }
1140                         return NULL;
1141                 }
1142
1143                 imap_free_capabilities(session);
1144                 session->authenticated = FALSE;
1145                 session->uidplus = FALSE;
1146                 session->cmd_count = 1;
1147         }
1148 #endif
1149         log_message(LOG_PROTOCOL, "IMAP connection is %s-authenticated\n",
1150                     (session->authenticated) ? "pre" : "un");
1151
1152         return session;
1153 }
1154
1155 static gint imap_session_authenticate(IMAPSession *session,
1156                                       const PrefsAccount *account)
1157 {
1158         gchar *pass, *acc_pass;
1159         gboolean failed = FALSE;
1160         gint ok = MAILIMAP_NO_ERROR;
1161         g_return_val_if_fail(account->userid != NULL, MAILIMAP_ERROR_BAD_STATE);
1162         acc_pass = account->passwd;
1163 try_again:
1164         pass = acc_pass;
1165         if (!pass && account->imap_auth_type != IMAP_AUTH_ANON) {
1166                 gchar *tmp_pass;
1167                 tmp_pass = input_dialog_query_password(account->recv_server, account->userid);
1168                 if (!tmp_pass)
1169                         return MAILIMAP_NO_ERROR;
1170                 Xstrdup_a(pass, tmp_pass, {g_free(tmp_pass); return MAILIMAP_NO_ERROR;});
1171                 g_free(tmp_pass);
1172         } else if (account->imap_auth_type == IMAP_AUTH_ANON) {
1173                 pass = "";
1174         }
1175         statuswindow_print_all(_("Connecting to IMAP4 server %s...\n"),
1176                                 account->recv_server);
1177         if ((ok = imap_auth(session, account->userid, pass, account->imap_auth_type)) != MAILIMAP_NO_ERROR) {
1178                 statusbar_pop_all();
1179
1180                 if (!failed && !is_fatal(ok)) {
1181                         acc_pass = NULL;
1182                         failed = TRUE;
1183                         goto try_again;
1184                 } else {
1185                         if (prefs_common.no_recv_err_panel) {
1186                                 log_error(LOG_PROTOCOL, _("Couldn't login to IMAP server %s.\n"), account->recv_server);
1187                                 mainwindow_show_error();
1188                         } else
1189                                 alertpanel_error_log(_("Couldn't login to IMAP server %s."), account->recv_server);
1190                 }
1191
1192                 return ok;
1193         }
1194
1195         statuswindow_pop_all();
1196         session->authenticated = TRUE;
1197         return MAILIMAP_NO_ERROR;
1198 }
1199
1200 static void imap_session_destroy(Session *session)
1201 {
1202         if (session->state != SESSION_DISCONNECTED)
1203                 imap_threaded_disconnect(IMAP_SESSION(session)->folder);
1204
1205         imap_free_capabilities(IMAP_SESSION(session));
1206         g_free(IMAP_SESSION(session)->mbox);
1207 }
1208
1209 static gchar *imap_fetch_msg(Folder *folder, FolderItem *item, gint uid)
1210 {
1211         return imap_fetch_msg_full(folder, item, uid, TRUE, TRUE);
1212 }
1213
1214 static guint get_file_size_with_crs(const gchar *filename)
1215 {
1216         FILE *fp = NULL;
1217         guint cnt = 0;
1218         gchar buf[4096];
1219
1220         if (filename == NULL)
1221                 return -1;
1222
1223         fp = fopen(filename, "rb");
1224         if (!fp)
1225                 return -1;
1226
1227         while (fgets(buf, sizeof (buf), fp) != NULL) {
1228                 cnt += strlen(buf);
1229                 if (!strstr(buf, "\r\n") && strstr(buf, "\n"))
1230                         cnt++;
1231         }
1232
1233         fclose(fp);
1234         return cnt;
1235 }
1236
1237 static void imap_remove_cached_msg(Folder *folder, FolderItem *item, MsgInfo *msginfo)
1238 {
1239         gchar *path, *filename;
1240
1241         path = folder_item_get_path(item);
1242
1243         if (!is_dir_exist(path)) {
1244                 g_free(path);
1245                 return;
1246         }
1247
1248         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(msginfo->msgnum), NULL);
1249         g_free(path);
1250
1251         if (is_file_exist(filename)) {
1252                 claws_unlink(filename);
1253         }
1254         g_free(filename);
1255 }
1256
1257 typedef struct _TagsData {
1258         gchar *str;
1259         GSList *msglist;
1260         IMAPFolderItem *item;
1261 } TagsData;
1262
1263 static void imap_commit_tags(FolderItem *item, MsgInfo *msginfo, GSList *tags_set, GSList *tags_unset)
1264 {
1265         IMAPSession *session;
1266         gint ok, can_create_tags;
1267         Folder *folder = NULL;
1268         TagsData *ht_data = NULL;
1269         GSList *cur;
1270
1271         g_return_if_fail(item != NULL);
1272         g_return_if_fail(msginfo != NULL);
1273
1274         folder = item->folder;
1275         debug_print("getting session...\n");
1276         session = imap_session_get(folder);
1277
1278         if (!session) {
1279                 debug_print("can't get session\n");
1280                 return;
1281         }
1282
1283         ok = imap_select(session, IMAP_FOLDER(folder), item,
1284                          NULL, NULL, NULL, NULL, &can_create_tags, FALSE);
1285
1286         if (ok != MAILIMAP_NO_ERROR) {
1287                 return;
1288         }
1289
1290
1291         if (IMAP_FOLDER_ITEM(item)->can_create_flags != ITEM_CAN_CREATE_FLAGS)
1292                 return;
1293
1294         if (IMAP_FOLDER_ITEM(item)->batching) {
1295                 /* instead of performing an UID STORE command for each message change,
1296                  * as a lot of them can change "together", we just fill in hashtables
1297                  * and defer the treatment so that we're able to send only one
1298                  * command.
1299                  */
1300                 debug_print("IMAP batch mode on, deferring tags change\n");
1301                 for (cur = tags_set; cur; cur = cur->next) {
1302                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1303                         if (cur_tag) {
1304                                 ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->tags_set_table,
1305                                         GINT_TO_POINTER(cur_tag));
1306                                 if (ht_data == NULL) {
1307                                         ht_data = g_new0(TagsData, 1);
1308                                         ht_data->str = g_strdup(tags_get_tag(cur_tag));
1309                                         ht_data->item = IMAP_FOLDER_ITEM(item);
1310                                         g_hash_table_insert(IMAP_FOLDER_ITEM(item)->tags_set_table,
1311                                                 GINT_TO_POINTER(cur_tag), ht_data);
1312                                 }
1313                                 ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
1314                         }
1315                 }
1316                 for (cur = tags_unset; cur; cur = cur->next) {
1317                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1318                         if (cur_tag) {
1319                                 ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->tags_unset_table,
1320                                         GINT_TO_POINTER(cur_tag));
1321                                 if (ht_data == NULL) {
1322                                         ht_data = g_new0(TagsData, 1);
1323                                         ht_data->str = g_strdup(tags_get_tag(cur_tag));
1324                                         ht_data->item = IMAP_FOLDER_ITEM(item);
1325                                         g_hash_table_insert(IMAP_FOLDER_ITEM(item)->tags_unset_table,
1326                                                 GINT_TO_POINTER(cur_tag), ht_data);
1327                                 }
1328                                 ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
1329                         }
1330                 }
1331         } else {
1332                 GSList *list_set = NULL;
1333                 GSList *list_unset = NULL;
1334                 GSList numlist;
1335
1336                 numlist.data = GINT_TO_POINTER(msginfo->msgnum);
1337                 numlist.next = NULL;
1338
1339                 debug_print("IMAP changing tags NOW\n");
1340                 for (cur = tags_set; cur; cur = cur->next) {
1341                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1342                         const gchar *str = tags_get_tag(cur_tag);
1343                         if (strcmp(str, "$Forwarded") && strcmp(str, "Junk") && strcmp(str, "NonJunk") && strcmp(str, "NotJunk") && strcmp(str, "NoJunk") && strcmp(str, "Junk") )
1344                                 list_set = g_slist_prepend(list_set, g_strdup(str));
1345                 }
1346                 if (list_set) {
1347                         ok = imap_set_message_flags(session,
1348                                 IMAP_FOLDER_ITEM(item), &numlist, 0, list_set, TRUE);
1349                         slist_free_strings(list_set);
1350                         g_slist_free(list_set);
1351                         if (ok != MAILIMAP_NO_ERROR) {
1352                                 return;
1353                         }
1354                 }
1355
1356                 for (cur = tags_unset; cur; cur = cur->next) {
1357                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1358                         const gchar *str = tags_get_tag(cur_tag);
1359                         if (strcmp(str, "$Forwarded") && strcmp(str, "Junk") && strcmp(str, "NonJunk") && strcmp(str, "NotJunk") && strcmp(str, "NoJunk") && strcmp(str, "Junk") )
1360                                 list_unset = g_slist_prepend(list_unset, g_strdup(str));
1361                 }
1362                 if (list_unset) {
1363                         ok = imap_set_message_flags(session,
1364                                 IMAP_FOLDER_ITEM(item), &numlist, 0, list_unset, FALSE);
1365                         slist_free_strings(list_unset);
1366                         g_slist_free(list_unset);
1367                         if (ok != MAILIMAP_NO_ERROR) {
1368                                 return;
1369                         }
1370                 }
1371         }
1372 }
1373
1374 static gchar *imap_fetch_msg_full(Folder *folder, FolderItem *item, gint uid,
1375                                   gboolean headers, gboolean body)
1376 {
1377         gchar *path, *filename;
1378         IMAPSession *session;
1379         gint ok;
1380
1381         g_return_val_if_fail(folder != NULL, NULL);
1382         g_return_val_if_fail(item != NULL, NULL);
1383
1384         if (uid == 0)
1385                 return NULL;
1386
1387         path = folder_item_get_path(item);
1388         if (!is_dir_exist(path))
1389                 make_dir_hier(path);
1390         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(uid), NULL);
1391         g_free(path);
1392         debug_print("trying to fetch cached %s\n", filename);
1393         if (is_file_exist(filename)) {
1394                 /* see whether the local file represents the whole message
1395                  * or not. As the IMAP server reports size with \r chars,
1396                  * we have to update the local file (UNIX \n only) size */
1397                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1398                 guint have_size = -1;
1399
1400                 if (cached)
1401                         debug_print("message %d has been already %scached.\n", uid,
1402                                 MSG_IS_FULLY_CACHED(cached->flags) ? "fully ":"");
1403
1404                 if (!cached || !MSG_IS_FULLY_CACHED(cached->flags)) {
1405                         have_size = get_file_size_with_crs(filename);
1406                         if (cached && (cached->size <= have_size || !body)) {
1407                                 procmsg_msginfo_free(cached);
1408                                 ok = file_strip_crs(filename);
1409                                 if (ok == 0 && cached && cached->size <= have_size) {
1410                                         /* we have it all and stripped */
1411                                         debug_print("...fully cached in fact; setting flag.\n");
1412                                         procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1413                                 }
1414                                 return filename;
1415                         } else if (!cached && time(NULL) - get_file_mtime(filename) < 60) {
1416                                 debug_print("message not cached and file recent, considering file complete\n");
1417                                 ok = file_strip_crs(filename);
1418                                 if (ok == 0)
1419                                         return filename;
1420                         } else {
1421                                 procmsg_msginfo_free(cached);
1422                         }
1423                 }
1424                 if (cached && MSG_IS_FULLY_CACHED(cached->flags)) {
1425                         procmsg_msginfo_free(cached);
1426                         return filename;
1427                 }
1428         } else {
1429                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1430                 if (cached) {
1431                         procmsg_msginfo_unset_flags(cached, MSG_FULLY_CACHED, 0);
1432                         procmsg_msginfo_free(cached);
1433                 }
1434         }
1435
1436         debug_print("getting session...\n");
1437         session = imap_session_get(folder);
1438
1439         if (!session) {
1440                 g_free(filename);
1441                 return NULL;
1442         }
1443         session_set_access_time(SESSION(session));
1444         lock_session(session); /* unlocked later in the function */
1445
1446         debug_print("IMAP fetching messages\n");
1447         ok = imap_select(session, IMAP_FOLDER(folder), item,
1448                          NULL, NULL, NULL, NULL, NULL, FALSE);
1449         if (ok != MAILIMAP_NO_ERROR) {
1450                 g_warning("can't select mailbox %s\n", item->path);
1451                 g_free(filename);
1452                 return NULL;
1453         }
1454
1455         session_set_access_time(SESSION(session));
1456
1457         debug_print("getting message %d...\n", uid);
1458         ok = imap_cmd_fetch(session, (guint32)uid, filename, headers, body);
1459
1460         if (ok != MAILIMAP_NO_ERROR) {
1461                 g_warning("can't fetch message %d\n", uid);
1462                 g_free(filename);
1463                 return NULL;
1464         }
1465
1466         session_set_access_time(SESSION(session));
1467         unlock_session(session);
1468
1469         ok = file_strip_crs(filename);
1470
1471         if (ok == 0 && headers && body) {
1472                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1473                 if (cached) {
1474                         procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1475                         procmsg_msginfo_free(cached);
1476                 }
1477         } else if (ok == -1) {
1478                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1479                 if (cached) {
1480                         procmsg_msginfo_unset_flags(cached, MSG_FULLY_CACHED, 0);
1481                         procmsg_msginfo_free(cached);
1482                 }
1483         }
1484         return filename;
1485 }
1486
1487 static gboolean imap_is_msg_fully_cached(Folder *folder, FolderItem *item, gint uid)
1488 {
1489         gchar *path, *filename;
1490         guint size = 0;
1491         MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1492
1493         if (!cached)
1494                 return FALSE;
1495
1496         if (MSG_IS_FULLY_CACHED(cached->flags)) {
1497                 procmsg_msginfo_free(cached);
1498                 return TRUE;
1499         }
1500         path = folder_item_get_path(item);
1501         if (!is_dir_exist(path))
1502                 return FALSE;
1503
1504         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(uid), NULL);
1505         g_free(path);
1506         if (is_file_exist(filename)) {
1507                 if (cached && cached->total_size == cached->size) {
1508                         /* fast path */
1509                         g_free(filename);
1510                         procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1511                         return TRUE;
1512                 }
1513                 size = get_file_size_with_crs(filename);
1514                 g_free(filename);
1515         }
1516         if (cached && size >= cached->size) {
1517                 cached->total_size = cached->size;
1518                 procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1519                 procmsg_msginfo_free(cached);
1520                 return TRUE;
1521         }
1522         if (cached)
1523                 procmsg_msginfo_free(cached);
1524         return FALSE;
1525 }
1526
1527 void imap_cache_msg(FolderItem *item, gint msgnum)
1528 {
1529         Folder *folder = NULL;
1530
1531         if (!item)
1532                 return;
1533         folder = item->folder;
1534
1535         if (!imap_is_msg_fully_cached(folder, item, msgnum)) {
1536                 gchar *tmp = imap_fetch_msg_full(folder, item, msgnum, TRUE, TRUE);
1537                 debug_print("fetched %s\n", tmp);
1538                 g_free(tmp);
1539         }
1540 }
1541
1542 static gint imap_add_msg(Folder *folder, FolderItem *dest,
1543                          const gchar *file, MsgFlags *flags)
1544 {
1545         gint ret;
1546         GSList file_list;
1547         MsgFileInfo fileinfo;
1548
1549         g_return_val_if_fail(file != NULL, -1);
1550
1551         fileinfo.msginfo = NULL;
1552         fileinfo.file = (gchar *)file;
1553         fileinfo.flags = flags;
1554         file_list.data = &fileinfo;
1555         file_list.next = NULL;
1556
1557         ret = imap_add_msgs(folder, dest, &file_list, NULL);
1558         return ret;
1559 }
1560
1561 static gint imap_add_msgs(Folder *folder, FolderItem *dest, GSList *file_list,
1562                    GRelation *relation)
1563 {
1564         gchar *destdir;
1565         IMAPSession *session;
1566         guint32 last_uid = 0;
1567         GSList *cur;
1568         MsgFileInfo *fileinfo;
1569         gint ok = MAILIMAP_NO_ERROR;
1570         gint curnum = 0, total = 0;
1571         gboolean missing_uids = FALSE;
1572
1573         g_return_val_if_fail(folder != NULL, -1);
1574         g_return_val_if_fail(dest != NULL, -1);
1575         g_return_val_if_fail(file_list != NULL, -1);
1576
1577         debug_print("getting session...\n");
1578         session = imap_session_get(folder);
1579         if (!session) {
1580                 return -1;
1581         }
1582         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
1583         if (is_fatal(ok))
1584                 return -1;
1585         statusbar_print_all(_("Adding messages..."));
1586         total = g_slist_length(file_list);
1587         for (cur = file_list; cur != NULL; cur = cur->next) {
1588                 IMAPFlags iflags = 0;
1589                 guint32 new_uid = 0;
1590                 gchar *real_file = NULL;
1591                 fileinfo = (MsgFileInfo *)cur->data;
1592
1593                 statusbar_progress_all(curnum, total, total < 10 ? 1:10);
1594                 curnum++;
1595
1596                 if (fileinfo->flags) {
1597                         if (MSG_IS_MARKED(*fileinfo->flags))
1598                                 iflags |= IMAP_FLAG_FLAGGED;
1599                         if (MSG_IS_REPLIED(*fileinfo->flags))
1600                                 iflags |= IMAP_FLAG_ANSWERED;
1601                         if (MSG_IS_FORWARDED(*fileinfo->flags))
1602                                 iflags |= IMAP_FLAG_FORWARDED;
1603                         if (MSG_IS_SPAM(*fileinfo->flags))
1604                                 iflags |= IMAP_FLAG_SPAM;
1605                         else
1606                                 iflags |= IMAP_FLAG_HAM;
1607                         if (!MSG_IS_UNREAD(*fileinfo->flags))
1608                                 iflags |= IMAP_FLAG_SEEN;
1609
1610                 }
1611
1612                 if (real_file == NULL)
1613                         real_file = g_strdup(fileinfo->file);
1614
1615                 if (folder_has_parent_of_type(dest, F_QUEUE) ||
1616                     folder_has_parent_of_type(dest, F_OUTBOX) ||
1617                     folder_has_parent_of_type(dest, F_DRAFT) ||
1618                     folder_has_parent_of_type(dest, F_TRASH))
1619                         iflags |= IMAP_FLAG_SEEN;
1620
1621                 ok = imap_cmd_append(session, IMAP_FOLDER_ITEM(dest), destdir, real_file, iflags,
1622                                      &new_uid);
1623
1624                 if (ok != MAILIMAP_NO_ERROR) {
1625                         g_warning("can't append message %s\n", real_file);
1626                         g_free(real_file);
1627                         g_free(destdir);
1628                         statusbar_progress_all(0,0,0);
1629                         statusbar_pop_all();
1630                         return -1;
1631                 } else {
1632                         debug_print("appended new message as %d\n", new_uid);
1633                         /* put the local file in the imapcache, so that we don't
1634                          * have to fetch it back later. */
1635
1636                         if (new_uid == 0) {
1637                                 missing_uids = TRUE;
1638                                 debug_print("Missing UID (0)\n");
1639                         }
1640                         if (new_uid > 0) {
1641                                 gchar *cache_path = folder_item_get_path(dest);
1642                                 if (!is_dir_exist(cache_path))
1643                                         make_dir_hier(cache_path);
1644                                 if (is_dir_exist(cache_path)) {
1645                                         gchar *cache_file = g_strconcat(
1646                                                 cache_path, G_DIR_SEPARATOR_S,
1647                                                 itos(new_uid), NULL);
1648                                         copy_file(real_file, cache_file, TRUE);
1649                                         debug_print("got UID %d, copied to cache: %s\n", new_uid, cache_file);
1650                                         g_free(cache_file);
1651                                 }
1652                                 g_free(cache_path);
1653                         }
1654                 }
1655
1656                 if (relation != NULL)
1657                         g_relation_insert(relation, fileinfo->msginfo != NULL ?
1658                                           (gpointer) fileinfo->msginfo : (gpointer) fileinfo,
1659                                           GINT_TO_POINTER(new_uid));
1660                 if (last_uid < new_uid) {
1661                         last_uid = new_uid;
1662                 }
1663
1664                 g_free(real_file);
1665         }
1666
1667         statusbar_progress_all(0,0,0);
1668         statusbar_pop_all();
1669
1670
1671         g_free(destdir);
1672
1673         imap_scan_required(folder, dest);
1674
1675         session = imap_session_get(folder);
1676         if (!session) {
1677                 return -1;
1678         }
1679         if (missing_uids) {
1680                 gint a;
1681                 ok = imap_select(session, IMAP_FOLDER(folder), dest,
1682                          &a, NULL, NULL, NULL, NULL, FALSE);
1683         }
1684         return last_uid;
1685 }
1686
1687 static GSList *flatten_mailimap_set(struct mailimap_set * set)
1688 {
1689         GSList *result = NULL;
1690         clistiter *list;
1691         int start, end, t;
1692         GSList *cur;
1693
1694         for (list = clist_begin(set->set_list); list; list = clist_next(list)) {
1695                 struct mailimap_set_item *item = (struct mailimap_set_item *)clist_content(list);
1696                 start = item->set_first;
1697                 end = item->set_last;
1698                 for (t = start; t <= end; t++) {
1699                         result = g_slist_prepend(result, GINT_TO_POINTER(t));
1700                 }
1701         }
1702         result = g_slist_reverse(result);
1703         if (debug_get_mode()) {
1704                 debug_print("flat imap set: ");
1705                 for (cur = result; cur; cur = cur->next) {
1706                         debug_print("%d ", GPOINTER_TO_INT(cur->data));
1707                 }
1708                 debug_print("\n");
1709         }
1710
1711         return result;
1712 }
1713 static gint imap_do_copy_msgs(Folder *folder, FolderItem *dest,
1714                               MsgInfoList *msglist, GRelation *relation)
1715 {
1716         FolderItem *src;
1717         gchar *destdir;
1718         GSList *seq_list, *cur;
1719         MsgInfo *msginfo;
1720         IMAPSession *session;
1721         gint ok = MAILIMAP_NO_ERROR;
1722         GRelation *uid_mapping;
1723         gint last_num = 0;
1724         gboolean single = FALSE;
1725
1726         g_return_val_if_fail(folder != NULL, -1);
1727         g_return_val_if_fail(dest != NULL, -1);
1728         g_return_val_if_fail(msglist != NULL, -1);
1729
1730         debug_print("getting session...\n");
1731         session = imap_session_get(folder);
1732
1733         if (!session) {
1734                 return -1;
1735         }
1736
1737         msginfo = (MsgInfo *)msglist->data;
1738         if (msglist->next == NULL)
1739                 single = TRUE;
1740         src = msginfo->folder;
1741         if (src == dest) {
1742                 g_warning("the src folder is identical to the dest.\n");
1743                 return -1;
1744         }
1745
1746         if (src->folder != dest->folder) {
1747                 GSList *infolist = NULL, *cur;
1748                 int res = -1;
1749                 for (cur = msglist; cur; cur = cur->next) {
1750                         msginfo = (MsgInfo *)cur->data;
1751                         MsgFileInfo *fileinfo = g_new0(MsgFileInfo, 1);
1752                         fileinfo->file = procmsg_get_message_file(msginfo);
1753                         fileinfo->flags = &(msginfo->flags);
1754                         infolist = g_slist_prepend(infolist, fileinfo);
1755                 }
1756                 infolist = g_slist_reverse(infolist);
1757                 res = folder_item_add_msgs(dest, infolist, FALSE);
1758                 for (cur = infolist; cur; cur = cur->next) {
1759                         MsgFileInfo *info = (MsgFileInfo *)cur->data;
1760                         g_free(info->file);
1761                         g_free(info);
1762                 }
1763                 g_slist_free(infolist);
1764                 return res;
1765         }
1766
1767         lock_session(session); /* unlocked later in the function */
1768
1769         ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
1770                          NULL, NULL, NULL, NULL, NULL, FALSE);
1771         if (ok != MAILIMAP_NO_ERROR) {
1772                 return ok;
1773         }
1774
1775         unlock_session(session);
1776
1777         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
1778
1779         if (is_fatal(ok))
1780                 return ok;
1781
1782         seq_list = imap_get_lep_set_from_msglist(IMAP_FOLDER(folder), msglist);
1783         uid_mapping = g_relation_new(2);
1784         g_relation_index(uid_mapping, 0, g_direct_hash, g_direct_equal);
1785
1786         statusbar_print_all(_("Copying messages..."));
1787         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
1788                 struct mailimap_set * seq_set;
1789                 struct mailimap_set * source = NULL;
1790                 struct mailimap_set * dest = NULL;
1791                 seq_set = cur->data;
1792
1793                 debug_print("Copying messages from %s to %s ...\n",
1794                             src->path, destdir);
1795
1796                 lock_session(session); /* unlocked later in the function */
1797                 ok = imap_cmd_copy(session, seq_set, destdir, uid_mapping,
1798                         &source, &dest);
1799
1800                 if (is_fatal(ok)) {
1801                         session = NULL;
1802                 }
1803
1804                 if (ok == MAILIMAP_NO_ERROR) {
1805                         unlock_session(session);
1806                         if (relation && source && dest) {
1807                                 GSList *s_list = flatten_mailimap_set(source);
1808                                 GSList *d_list = flatten_mailimap_set(dest);
1809                                 GSList *s_cur, *d_cur;
1810                                 if (g_slist_length(s_list) == g_slist_length(d_list)) {
1811
1812                                         for (s_cur = s_list, d_cur = d_list;
1813                                              s_cur && d_cur;
1814                                              s_cur = s_cur->next, d_cur = d_cur->next) {
1815                                                 g_relation_insert(uid_mapping, s_cur->data, d_cur->data);
1816                                         }
1817
1818                                 } else {
1819                                         debug_print("hhhmm, source list length != dest list length.\n");
1820                                 }
1821                                 g_slist_free(s_list);
1822                                 g_slist_free(d_list);
1823                         }
1824                 }
1825
1826
1827                 if (source)
1828                         mailimap_set_free(source);
1829                 if (dest)
1830                         mailimap_set_free(dest);
1831
1832                 if (ok != MAILIMAP_NO_ERROR) {
1833                         g_relation_destroy(uid_mapping);
1834                         imap_lep_set_free(seq_list);
1835                         statusbar_pop_all();
1836                         return -1;
1837                 }
1838         }
1839
1840         for (cur = msglist; cur != NULL; cur = g_slist_next(cur)) {
1841                 MsgInfo *msginfo = (MsgInfo *)cur->data;
1842                 GTuples *tuples;
1843
1844                 tuples = g_relation_select(uid_mapping,
1845                                            GINT_TO_POINTER(msginfo->msgnum),
1846                                            0);
1847                 if (tuples->len > 0) {
1848                         gint num = GPOINTER_TO_INT(g_tuples_index(tuples, 0, 1));
1849                         g_relation_insert(relation, msginfo,
1850                                           GINT_TO_POINTER(num));
1851                         if (num > last_num)
1852                                 last_num = num;
1853                         debug_print("copied message %d as %d\n", msginfo->msgnum, num);
1854                         /* put the local file in the imapcache, so that we don't
1855                          * have to fetch it back later. */
1856                         if (num > 0) {
1857                                 gchar *cache_path = folder_item_get_path(msginfo->folder);
1858                                 gchar *real_file = g_strconcat(
1859                                         cache_path, G_DIR_SEPARATOR_S,
1860                                         itos(msginfo->msgnum), NULL);
1861                                 gchar *cache_file = NULL;
1862                                 g_free(cache_path);
1863                                 cache_path = folder_item_get_path(dest);
1864                                 cache_file = g_strconcat(
1865                                         cache_path, G_DIR_SEPARATOR_S,
1866                                         itos(num), NULL);
1867                                 if (!is_dir_exist(cache_path))
1868                                         make_dir_hier(cache_path);
1869                                 if (is_file_exist(real_file) && is_dir_exist(cache_path)) {
1870                                         copy_file(real_file, cache_file, TRUE);
1871                                         debug_print("copied to cache: %s\n", cache_file);
1872                                 }
1873                                 g_free(real_file);
1874                                 g_free(cache_file);
1875                                 g_free(cache_path);
1876                         }
1877                 } else
1878                         g_relation_insert(relation, msginfo,
1879                                           GINT_TO_POINTER(0));
1880                 g_tuples_destroy(tuples);
1881         }
1882         statusbar_pop_all();
1883
1884         g_relation_destroy(uid_mapping);
1885         imap_lep_set_free(seq_list);
1886
1887         g_free(destdir);
1888
1889         IMAP_FOLDER_ITEM(dest)->lastuid = 0;
1890         IMAP_FOLDER_ITEM(dest)->uid_next = 0;
1891         g_slist_free(IMAP_FOLDER_ITEM(dest)->uid_list);
1892         IMAP_FOLDER_ITEM(dest)->uid_list = NULL;
1893
1894         imap_scan_required(folder, dest);
1895         if (ok == MAILIMAP_NO_ERROR)
1896                 return last_num;
1897         else
1898                 return -1;
1899 }
1900
1901 static gint imap_copy_msg(Folder *folder, FolderItem *dest, MsgInfo *msginfo)
1902 {
1903         GSList msglist;
1904
1905         g_return_val_if_fail(msginfo != NULL, -1);
1906
1907         msglist.data = msginfo;
1908         msglist.next = NULL;
1909
1910         return imap_copy_msgs(folder, dest, &msglist, NULL);
1911 }
1912
1913 static gint imap_copy_msgs(Folder *folder, FolderItem *dest,
1914                     MsgInfoList *msglist, GRelation *relation)
1915 {
1916         MsgInfo *msginfo;
1917         gint ret;
1918
1919         g_return_val_if_fail(folder != NULL, -1);
1920         g_return_val_if_fail(dest != NULL, -1);
1921         g_return_val_if_fail(msglist != NULL, -1);
1922
1923         msginfo = (MsgInfo *)msglist->data;
1924         g_return_val_if_fail(msginfo->folder != NULL, -1);
1925
1926         ret = imap_do_copy_msgs(folder, dest, msglist, relation);
1927         return ret;
1928 }
1929
1930
1931 static gint imap_do_remove_msgs(Folder *folder, FolderItem *dest,
1932                                 MsgInfoList *msglist, GRelation *relation)
1933 {
1934         gchar *destdir, *dir;
1935         GSList *numlist = NULL, *cur;
1936         MsgInfo *msginfo;
1937         IMAPSession *session;
1938         gint ok = MAILIMAP_NO_ERROR;
1939         GRelation *uid_mapping;
1940
1941         g_return_val_if_fail(folder != NULL, -1);
1942         g_return_val_if_fail(dest != NULL, -1);
1943         g_return_val_if_fail(msglist != NULL, -1);
1944
1945         debug_print("getting session...\n");
1946         session = imap_session_get(folder);
1947         if (!session) {
1948                 return -1;
1949         }
1950
1951         lock_session(session); /* unlocked later in the function */
1952
1953         msginfo = (MsgInfo *)msglist->data;
1954
1955         ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
1956                          NULL, NULL, NULL, NULL, NULL, FALSE);
1957         if (ok != MAILIMAP_NO_ERROR) {
1958                 return ok;
1959         }
1960
1961         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
1962         if (is_fatal(ok))
1963                 return ok;
1964         for (cur = msglist; cur; cur = cur->next) {
1965                 msginfo = (MsgInfo *)cur->data;
1966                 if (!MSG_IS_DELETED(msginfo->flags))
1967                         numlist = g_slist_prepend(numlist, GINT_TO_POINTER(msginfo->msgnum));
1968         }
1969         numlist = g_slist_reverse(numlist);
1970
1971         uid_mapping = g_relation_new(2);
1972         g_relation_index(uid_mapping, 0, g_direct_hash, g_direct_equal);
1973
1974         if (numlist != NULL) {
1975                 ok = imap_set_message_flags
1976                         (session, IMAP_FOLDER_ITEM(msginfo->folder), numlist, IMAP_FLAG_DELETED, NULL, TRUE);
1977                 if (ok != MAILIMAP_NO_ERROR) {
1978                         log_warning(LOG_PROTOCOL, _("can't set deleted flags\n"));
1979                         return ok;
1980                 }
1981         } /* else we just need to expunge */
1982         ok = imap_cmd_expunge(session);
1983         if (ok != MAILIMAP_NO_ERROR) {
1984                 log_warning(LOG_PROTOCOL, _("can't expunge\n"));
1985                 return ok;
1986         }
1987
1988         session->folder_content_changed = TRUE;
1989         unlock_session(session);
1990
1991         dir = folder_item_get_path(msginfo->folder);
1992         if (is_dir_exist(dir)) {
1993                 for (cur = msglist; cur; cur = cur->next) {
1994                         msginfo = (MsgInfo *)cur->data;
1995                         remove_numbered_files(dir, msginfo->msgnum, msginfo->msgnum);
1996                 }
1997         }
1998         g_free(dir);
1999
2000         g_relation_destroy(uid_mapping);
2001         g_slist_free(numlist);
2002
2003         imap_scan_required(folder, dest);
2004
2005         g_free(destdir);
2006         if (ok == MAILIMAP_NO_ERROR)
2007                 return 0;
2008         else
2009                 return -1;
2010 }
2011
2012 static gint imap_remove_msgs(Folder *folder, FolderItem *dest,
2013                     MsgInfoList *msglist, GRelation *relation)
2014 {
2015         MsgInfo *msginfo;
2016
2017         g_return_val_if_fail(folder != NULL, -1);
2018         g_return_val_if_fail(dest != NULL, -1);
2019         if (msglist == NULL)
2020                 return 0;
2021
2022         msginfo = (MsgInfo *)msglist->data;
2023         g_return_val_if_fail(msginfo->folder != NULL, -1);
2024
2025         return imap_do_remove_msgs(folder, dest, msglist, relation);
2026 }
2027
2028 static gint imap_remove_all_msg(Folder *folder, FolderItem *item)
2029 {
2030         GSList *list = folder_item_get_msg_list(item);
2031         gint res = imap_remove_msgs(folder, item, list, NULL);
2032         procmsg_msg_list_free(list);
2033         return res;
2034 }
2035
2036 static gboolean imap_is_msg_changed(Folder *folder, FolderItem *item,
2037                                     MsgInfo *msginfo)
2038 {
2039         /* TODO: properly implement this method */
2040         return FALSE;
2041 }
2042
2043 static gint imap_close(Folder *folder, FolderItem *item)
2044 {
2045         return 0;
2046 }
2047
2048 static gint imap_scan_tree_real(Folder *folder, gboolean subs_only)
2049 {
2050         FolderItem *item = NULL;
2051         IMAPSession *session;
2052         gchar *root_folder = NULL;
2053
2054         g_return_val_if_fail(folder != NULL, -1);
2055         g_return_val_if_fail(folder->account != NULL, -1);
2056
2057         debug_print("getting session...\n");
2058         session = imap_session_get(folder);
2059         if (!session) {
2060                 if (!folder->node) {
2061                         folder_tree_destroy(folder);
2062                         item = folder_item_new(folder, folder->name, NULL);
2063                         item->folder = folder;
2064                         folder->node = item->node = g_node_new(item);
2065                 }
2066                 return -1;
2067         }
2068
2069         if (folder->account->imap_dir && *folder->account->imap_dir) {
2070                 gchar *real_path;
2071                 int r;
2072                 clist * lep_list;
2073
2074                 Xstrdup_a(root_folder, folder->account->imap_dir, {return -1;});
2075                 extract_quote(root_folder, '"');
2076                 subst_char(root_folder,
2077                            imap_get_path_separator(session, IMAP_FOLDER(folder),
2078                                                    root_folder, &r),
2079                            '/');
2080                 if (is_fatal(r))
2081                         return -1;
2082                 strtailchomp(root_folder, '/');
2083                 real_path = imap_get_real_path
2084                         (session, IMAP_FOLDER(folder), root_folder, &r);
2085                 if (is_fatal(r))
2086                         return -1;
2087                 debug_print("IMAP root directory: %s\n", real_path);
2088
2089                 /* check if root directory exist */
2090
2091                 r = imap_threaded_list(session->folder, "", real_path,
2092                                        &lep_list);
2093
2094                 if (r != MAILIMAP_NO_ERROR)
2095                         imap_handle_error(SESSION(session), r);
2096
2097                 if ((r != MAILIMAP_NO_ERROR) || (clist_count(lep_list) == 0)) {
2098                         if (!folder->node) {
2099                                 item = folder_item_new(folder, folder->name, NULL);
2100                                 item->folder = folder;
2101                                 folder->node = item->node = g_node_new(item);
2102                         }
2103                         return -1;
2104                 }
2105                 mailimap_list_result_free(lep_list);
2106
2107                 g_free(real_path);
2108         }
2109
2110         if (folder->node)
2111                 item = FOLDER_ITEM(folder->node->data);
2112
2113         if (item && !item->path && root_folder) {
2114                 item->path = g_strdup(root_folder);
2115         }
2116
2117         if (!item || ((item->path || root_folder) &&
2118                       strcmp2(item->path, root_folder) != 0)) {
2119                 folder_tree_destroy(folder);
2120                 item = folder_item_new(folder, folder->name, root_folder);
2121                 item->folder = folder;
2122                 folder->node = item->node = g_node_new(item);
2123         }
2124
2125         imap_scan_tree_recursive(session, FOLDER_ITEM(folder->node->data), subs_only);
2126         imap_create_missing_folders(folder);
2127
2128         return 0;
2129 }
2130
2131 static gint imap_scan_tree(Folder *folder)
2132 {
2133         gboolean subs_only = FALSE;
2134         if (folder->account) {
2135                 debug_print(" scanning only subs %d\n", folder->account->imap_subsonly);
2136                 subs_only = folder->account->imap_subsonly;
2137         }
2138         return imap_scan_tree_real(folder, subs_only);
2139 }
2140
2141 static gint imap_scan_tree_recursive(IMAPSession *session, FolderItem *item, gboolean subs_only)
2142 {
2143         Folder *folder;
2144         IMAPFolder *imapfolder;
2145         FolderItem *new_item;
2146         GSList *item_list, *cur;
2147         GNode *node;
2148         gchar *real_path;
2149         gchar *wildcard_path;
2150         gchar separator;
2151         gchar wildcard[3];
2152         clist * lep_list;
2153         int r;
2154
2155         g_return_val_if_fail(item != NULL, -1);
2156         g_return_val_if_fail(item->folder != NULL, -1);
2157         g_return_val_if_fail(item->no_sub == FALSE, -1);
2158
2159         folder = item->folder;
2160         imapfolder = IMAP_FOLDER(folder);
2161
2162         separator = imap_get_path_separator(session, imapfolder, item->path, &r);
2163         if (is_fatal(r))
2164                 return r;
2165
2166         if (folder->ui_func)
2167                 folder->ui_func(folder, item, folder->ui_func_data);
2168
2169         if (item->path) {
2170                 wildcard[0] = separator;
2171                 wildcard[1] = '%';
2172                 wildcard[2] = '\0';
2173                 real_path = imap_get_real_path(session, imapfolder, item->path, &r);
2174                 if (is_fatal(r))
2175                         return r;
2176         } else {
2177                 wildcard[0] = '%';
2178                 wildcard[1] = '\0';
2179                 real_path = g_strdup("");
2180         }
2181
2182         Xstrcat_a(wildcard_path, real_path, wildcard,
2183                   {g_free(real_path); return MAILIMAP_ERROR_BAD_STATE;});
2184         lep_list = NULL;
2185
2186         if (subs_only)
2187                 r = imap_threaded_lsub(folder, "", wildcard_path, &lep_list);
2188         else
2189                 r = imap_threaded_list(folder, "", wildcard_path, &lep_list);
2190
2191         if (r != MAILIMAP_NO_ERROR) {
2192                 imap_handle_error(SESSION(session), r);
2193                 item_list = NULL;
2194                 return r;
2195         }
2196         else {
2197                 item_list = imap_list_from_lep(imapfolder,
2198                                                lep_list, real_path, FALSE);
2199                 mailimap_list_result_free(lep_list);
2200         }
2201
2202         g_free(real_path);
2203
2204         node = item->node->children;
2205         while (node != NULL) {
2206                 FolderItem *old_item = FOLDER_ITEM(node->data);
2207                 GNode *next = node->next;
2208
2209                 new_item = NULL;
2210                 for (cur = item_list; cur != NULL; cur = cur->next) {
2211                         FolderItem *cur_item = FOLDER_ITEM(cur->data);
2212                         if (!strcmp2(old_item->path, cur_item->path)) {
2213                                 new_item = cur_item;
2214                                 break;
2215                         }
2216                 }
2217                 if (!new_item) {
2218                         if (old_item && old_item->path && !strcmp(old_item->path, "INBOX")) {
2219                                 debug_print("not removing INBOX\n");
2220                         } else {
2221                                 debug_print("folder '%s' not found. removing...\n",
2222                                             old_item->path);
2223                                 folder_item_remove(old_item);
2224                         }
2225                 } else {
2226                         old_item->no_sub = new_item->no_sub;
2227                         old_item->no_select = new_item->no_select;
2228                         if (old_item->no_sub == TRUE && node->children) {
2229                                 debug_print("folder '%s' doesn't have "
2230                                             "subfolders. removing...\n",
2231                                             old_item->path);
2232                                 folder_item_remove_children(old_item);
2233                         }
2234                 }
2235
2236                 node = next;
2237         }
2238
2239         for (cur = item_list; cur != NULL; cur = cur->next) {
2240                 FolderItem *cur_item = FOLDER_ITEM(cur->data);
2241                 new_item = NULL;
2242
2243                 for (node = item->node->children; node != NULL;
2244                      node = node->next) {
2245                         if (!strcmp2(FOLDER_ITEM(node->data)->path,
2246                                      cur_item->path)) {
2247                                 new_item = FOLDER_ITEM(node->data);
2248                                 folder_item_destroy(cur_item);
2249                                 cur_item = NULL;
2250                                 break;
2251                         }
2252                 }
2253                 if (!new_item) {
2254                         new_item = cur_item;
2255                         debug_print("new folder '%s' found.\n", new_item->path);
2256                         folder_item_append(item, new_item);
2257                 }
2258
2259                 if (!strcmp(new_item->path, "INBOX")) {
2260                         new_item->stype = F_INBOX;
2261                         folder->inbox = new_item;
2262                 } else if (!folder_item_parent(item) || item->stype == F_INBOX) {
2263                         gchar *base;
2264
2265                         base = g_path_get_basename(new_item->path);
2266
2267                         if (!folder->outbox && !g_ascii_strcasecmp(base, "Sent")) {
2268                                 new_item->stype = F_OUTBOX;
2269                                 folder->outbox = new_item;
2270                         } else if (!folder->draft && !g_ascii_strcasecmp(base, "Drafts")) {
2271                                 new_item->stype = F_DRAFT;
2272                                 folder->draft = new_item;
2273                         } else if (!folder->queue && !g_ascii_strcasecmp(base, "Queue")) {
2274                                 new_item->stype = F_QUEUE;
2275                                 folder->queue = new_item;
2276                         } else if (!folder->trash && !g_ascii_strcasecmp(base, "Trash")) {
2277                                 new_item->stype = F_TRASH;
2278                                 folder->trash = new_item;
2279                         }
2280                         g_free(base);
2281                 }
2282
2283                 if (new_item->no_sub == FALSE)
2284                         imap_scan_tree_recursive(session, new_item, subs_only);
2285         }
2286
2287         g_slist_free(item_list);
2288
2289         return MAILIMAP_NO_ERROR;
2290 }
2291
2292 GList *imap_scan_subtree(Folder *folder, FolderItem *item, gboolean unsubs_only, gboolean recursive)
2293 {
2294         IMAPSession *session = imap_session_get(folder);
2295         gchar *real_path;
2296         gchar *wildcard_path;
2297         gchar separator;
2298         gchar wildcard[3];
2299         clist * lep_list;
2300         GSList *item_list = NULL, *cur;
2301         GList *child_list = NULL, *tmplist = NULL;
2302         GSList *sub_list = NULL;
2303         int r;
2304
2305         if (!session)
2306                 return NULL;
2307
2308         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &r);
2309         if (is_fatal(r))
2310                 return NULL;
2311
2312         if (item->path) {
2313                 wildcard[0] = separator;
2314                 wildcard[1] = '%';
2315                 wildcard[2] = '\0';
2316                 real_path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &r);
2317                 if (is_fatal(r))
2318                         return NULL;
2319         } else {
2320                 wildcard[0] = '%';
2321                 wildcard[1] = '\0';
2322                 real_path = g_strdup("");
2323         }
2324
2325         Xstrcat_a(wildcard_path, real_path, wildcard,
2326                   {g_free(real_path); return NULL;});
2327         lep_list = NULL;
2328
2329         if (unsubs_only)
2330                 statusbar_print_all(_("Looking for unsubscribed folders in %s..."),
2331                                 item->path?item->path:item->name);
2332         else
2333                 statusbar_print_all(_("Looking for subfolders of %s..."),
2334                                 item->path?item->path:item->name);
2335
2336         r = imap_threaded_list(folder, "", wildcard_path, &lep_list);
2337         if (r) {
2338                 statusbar_pop_all();
2339                 return NULL;
2340         }
2341         item_list = imap_list_from_lep(IMAP_FOLDER(folder),
2342                                lep_list, real_path, FALSE);
2343         mailimap_list_result_free(lep_list);
2344
2345         for (cur = item_list; cur != NULL; cur = cur->next) {
2346                 FolderItem *cur_item = FOLDER_ITEM(cur->data);
2347                 if (recursive) {
2348                         tmplist = imap_scan_subtree(folder, cur_item,
2349                                         unsubs_only, recursive);
2350                         if (tmplist)
2351                                 child_list = g_list_concat(child_list, tmplist);
2352                 }
2353                 child_list = g_list_prepend(child_list,
2354                                 imap_get_real_path(session,
2355                                         IMAP_FOLDER(folder), cur_item->path, &r));
2356                 if (is_fatal(r)) {
2357                         statusbar_pop_all();
2358                         return NULL;
2359                 }
2360                 folder_item_destroy(cur_item);
2361         }
2362         child_list = g_list_reverse(child_list);
2363         g_slist_free(item_list);
2364
2365         if (unsubs_only) {
2366                 r = imap_threaded_lsub(folder, "", wildcard_path, &lep_list);
2367                 if (r) {
2368                         statusbar_pop_all();
2369                         return NULL;
2370                 }
2371                 sub_list = imap_list_from_lep(IMAP_FOLDER(folder),
2372                                        lep_list, real_path, FALSE);
2373                 mailimap_list_result_free(lep_list);
2374
2375                 for (cur = sub_list; cur != NULL; cur = cur->next) {
2376                         FolderItem *cur_item = FOLDER_ITEM(cur->data);
2377                         GList *oldlitem = NULL;
2378                         gchar *tmp = imap_get_real_path(session,
2379                                         IMAP_FOLDER(folder), cur_item->path, &r);
2380                         if (r) {
2381                                 statusbar_pop_all();
2382                                 return NULL;
2383                         }
2384                         folder_item_destroy(cur_item);
2385                         oldlitem = g_list_find_custom(
2386                                         child_list, tmp, (GCompareFunc)strcmp2);
2387                         if (oldlitem) {
2388                                 child_list = g_list_remove_link(child_list, oldlitem);
2389                                 g_free(oldlitem->data);
2390                                 g_list_free(oldlitem);
2391                         }
2392                         g_free(tmp);
2393                 }
2394         }
2395
2396         statusbar_pop_all();
2397
2398         return child_list;
2399 }
2400
2401 static gint imap_create_tree(Folder *folder)
2402 {
2403         g_return_val_if_fail(folder != NULL, -1);
2404         g_return_val_if_fail(folder->node != NULL, -1);
2405         g_return_val_if_fail(folder->node->data != NULL, -1);
2406         g_return_val_if_fail(folder->account != NULL, -1);
2407
2408         imap_scan_tree(folder);
2409         imap_create_missing_folders(folder);
2410
2411         return 0;
2412 }
2413
2414 static void imap_create_missing_folders(Folder *folder)
2415 {
2416         g_return_if_fail(folder != NULL);
2417
2418         if (!folder->inbox)
2419                 folder->inbox = imap_create_special_folder
2420                         (folder, F_INBOX, "INBOX");
2421         if (!folder->trash)
2422                 folder->trash = imap_create_special_folder
2423                         (folder, F_TRASH, "Trash");
2424         if (!folder->queue)
2425                 folder->queue = imap_create_special_folder
2426                         (folder, F_QUEUE, "Queue");
2427         if (!folder->outbox)
2428                 folder->outbox = imap_create_special_folder
2429                         (folder, F_OUTBOX, "Sent");
2430         if (!folder->draft)
2431                 folder->draft = imap_create_special_folder
2432                         (folder, F_DRAFT, "Drafts");
2433 }
2434
2435 static FolderItem *imap_create_special_folder(Folder *folder,
2436                                               SpecialFolderItemType stype,
2437                                               const gchar *name)
2438 {
2439         FolderItem *item;
2440         FolderItem *new_item;
2441
2442         g_return_val_if_fail(folder != NULL, NULL);
2443         g_return_val_if_fail(folder->node != NULL, NULL);
2444         g_return_val_if_fail(folder->node->data != NULL, NULL);
2445         g_return_val_if_fail(folder->account != NULL, NULL);
2446         g_return_val_if_fail(name != NULL, NULL);
2447
2448         item = FOLDER_ITEM(folder->node->data);
2449         new_item = imap_create_folder(folder, item, name);
2450
2451         if (!new_item) {
2452                 g_warning("Can't create '%s'\n", name);
2453                 if (!folder->inbox) return NULL;
2454
2455                 new_item = imap_create_folder(folder, folder->inbox, name);
2456                 if (!new_item)
2457                         g_warning("Can't create '%s' under INBOX\n", name);
2458                 else
2459                         new_item->stype = stype;
2460         } else
2461                 new_item->stype = stype;
2462
2463         return new_item;
2464 }
2465
2466 static gchar *imap_folder_get_path(Folder *folder)
2467 {
2468         gchar *folder_path;
2469
2470         g_return_val_if_fail(folder != NULL, NULL);
2471         g_return_val_if_fail(folder->account != NULL, NULL);
2472
2473         folder_path = g_strconcat(get_imap_cache_dir(),
2474                                   G_DIR_SEPARATOR_S,
2475                                   folder->account->recv_server,
2476                                   G_DIR_SEPARATOR_S,
2477                                   folder->account->userid,
2478                                   NULL);
2479
2480         return folder_path;
2481 }
2482
2483 static gchar *imap_item_get_path(Folder *folder, FolderItem *item)
2484 {
2485         gchar *folder_path, *path;
2486
2487         g_return_val_if_fail(folder != NULL, NULL);
2488         g_return_val_if_fail(item != NULL, NULL);
2489         folder_path = imap_folder_get_path(folder);
2490
2491         g_return_val_if_fail(folder_path != NULL, NULL);
2492         if (folder_path[0] == G_DIR_SEPARATOR) {
2493                 if (item->path)
2494                         path = g_strconcat(folder_path, G_DIR_SEPARATOR_S,
2495                                            item->path, NULL);
2496                 else
2497                         path = g_strdup(folder_path);
2498         } else {
2499                 if (item->path)
2500                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
2501                                            folder_path, G_DIR_SEPARATOR_S,
2502                                            item->path, NULL);
2503                 else
2504                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
2505                                            folder_path, NULL);
2506         }
2507         g_free(folder_path);
2508
2509         return path;
2510 }
2511
2512 static FolderItem *imap_create_folder(Folder *folder, FolderItem *parent,
2513                                const gchar *name)
2514 {
2515         gchar *dirpath, *imap_path;
2516         IMAPSession *session;
2517         FolderItem *new_item;
2518         gchar separator;
2519         gchar *new_name;
2520         const gchar *p;
2521         gint ok;
2522         gboolean no_select = FALSE, no_sub = FALSE;
2523         gboolean exist = FALSE;
2524
2525         g_return_val_if_fail(folder != NULL, NULL);
2526         g_return_val_if_fail(folder->account != NULL, NULL);
2527         g_return_val_if_fail(parent != NULL, NULL);
2528         g_return_val_if_fail(name != NULL, NULL);
2529
2530         debug_print("getting session...\n");
2531         session = imap_session_get(folder);
2532         if (!session) {
2533                 return NULL;
2534         }
2535
2536         if (!folder_item_parent(parent) && strcmp(name, "INBOX") == 0) {
2537                 dirpath = g_strdup(name);
2538         }else if (parent->path)
2539                 dirpath = g_strconcat(parent->path, "/", name, NULL);
2540         else if ((p = strchr(name, '/')) != NULL && *(p + 1) != '\0')
2541                 dirpath = g_strdup(name);
2542         else if (folder->account->imap_dir && *folder->account->imap_dir) {
2543                 gchar *imap_dir;
2544
2545                 Xstrdup_a(imap_dir, folder->account->imap_dir, {return NULL;});
2546                 strtailchomp(imap_dir, '/');
2547                 dirpath = g_strconcat(imap_dir, "/", name, NULL);
2548         } else
2549                 dirpath = g_strdup(name);
2550
2551
2552
2553         /* keep trailing directory separator to create a folder that contains
2554            sub folder */
2555         imap_path = imap_utf8_to_modified_utf7(dirpath, FALSE);
2556
2557         strtailchomp(dirpath, '/');
2558         Xstrdup_a(new_name, name, {
2559                 g_free(dirpath);
2560                 return NULL;});
2561
2562         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), imap_path, &ok);
2563         if (is_fatal(ok))
2564                 return NULL;
2565         imap_path_separator_subst(imap_path, separator);
2566         /* remove trailing / for display */
2567         strtailchomp(new_name, '/');
2568
2569         if (strcmp(dirpath, "INBOX") != 0) {
2570                 GPtrArray *argbuf;
2571                 int r;
2572                 clist * lep_list;
2573
2574                 argbuf = g_ptr_array_new();
2575                 r = imap_threaded_list(folder, "", imap_path, &lep_list);
2576                 if (r != MAILIMAP_NO_ERROR) {
2577                         imap_handle_error(SESSION(session), r);
2578                         log_warning(LOG_PROTOCOL, _("can't create mailbox: LIST failed\n"));
2579                         g_free(imap_path);
2580                         g_free(dirpath);
2581                         ptr_array_free_strings(argbuf);
2582                         g_ptr_array_free(argbuf, TRUE);
2583                         return NULL;
2584                 }
2585
2586                 if (clist_count(lep_list) > 0)
2587                         exist = TRUE;
2588                 mailimap_list_result_free(lep_list);
2589                 lep_list = NULL;
2590                 if (!exist) {
2591                         ok = imap_cmd_create(session, imap_path);
2592                         if (ok != MAILIMAP_NO_ERROR) {
2593                                 log_warning(LOG_PROTOCOL, _("can't create mailbox\n"));
2594                                 g_free(imap_path);
2595                                 g_free(dirpath);
2596                                 return NULL;
2597                         }
2598                         r = imap_threaded_list(folder, "", imap_path, &lep_list);
2599                         if (r == MAILIMAP_NO_ERROR) {
2600                                 GSList *item_list = imap_list_from_lep(IMAP_FOLDER(folder),
2601                                                lep_list, dirpath, TRUE);
2602                                 if (item_list) {
2603                                         FolderItem *cur_item = FOLDER_ITEM(item_list->data);
2604                                         no_select = cur_item->no_select;
2605                                         no_sub = cur_item->no_sub;
2606                                         g_slist_free(item_list);
2607                                 }
2608                                 mailimap_list_result_free(lep_list);
2609                         } else {
2610                                 imap_handle_error(SESSION(session), r);
2611                         }
2612                 }
2613                 imap_threaded_subscribe(folder, imap_path, TRUE);
2614         } else {
2615                 clist *lep_list;
2616                 int r;
2617                 /* just get flags */
2618                 r = imap_threaded_list(folder, "", "INBOX", &lep_list);
2619                 if (r == MAILIMAP_NO_ERROR) {
2620                         GSList *item_list = imap_list_from_lep(IMAP_FOLDER(folder),
2621                                        lep_list, dirpath, TRUE);
2622                         if (item_list) {
2623                                 FolderItem *cur_item = FOLDER_ITEM(item_list->data);
2624                                 no_select = cur_item->no_select;
2625                                 no_sub = cur_item->no_sub;
2626                                 g_slist_free(item_list);
2627                         }
2628                         mailimap_list_result_free(lep_list);
2629                 } else {
2630                         imap_handle_error(SESSION(session), r);
2631                 }
2632         }
2633
2634         new_item = folder_item_new(folder, new_name, dirpath);
2635         new_item->no_select = no_select;
2636         new_item->no_sub = no_sub;
2637         folder_item_append(parent, new_item);
2638         g_free(imap_path);
2639         g_free(dirpath);
2640
2641         dirpath = folder_item_get_path(new_item);
2642         if (!is_dir_exist(dirpath))
2643                 make_dir_hier(dirpath);
2644         g_free(dirpath);
2645
2646         if (exist) {
2647                 /* folder existed, scan it */
2648                 imap_scan_required(folder, new_item);
2649                 folder_item_scan_full(new_item, FALSE);
2650         }
2651
2652         return new_item;
2653 }
2654
2655 static gint imap_rename_folder(Folder *folder, FolderItem *item,
2656                                const gchar *name)
2657 {
2658         gchar *dirpath;
2659         gchar *newpath;
2660         gchar *real_oldpath;
2661         gchar *real_newpath;
2662         gchar *paths[2];
2663         gchar *old_cache_dir;
2664         gchar *new_cache_dir;
2665         IMAPSession *session;
2666         gchar separator;
2667         gint ok;
2668         gint exists, recent, unseen;
2669         guint32 uid_validity;
2670
2671         g_return_val_if_fail(folder != NULL, -1);
2672         g_return_val_if_fail(item != NULL, -1);
2673         g_return_val_if_fail(item->path != NULL, -1);
2674         g_return_val_if_fail(name != NULL, -1);
2675
2676         debug_print("getting session...\n");
2677         session = imap_session_get(folder);
2678         if (!session) {
2679                 return -1;
2680         }
2681
2682         if (strchr(name, imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &ok)) != NULL ||
2683                 is_fatal(ok)) {
2684                 g_warning(_("New folder name must not contain the namespace "
2685                             "path separator"));
2686                 return -1;
2687         }
2688
2689         real_oldpath = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &ok);
2690         if (is_fatal(ok)) {
2691                 return -1;
2692         }
2693
2694         g_free(session->mbox);
2695         session->mbox = NULL;
2696         session->exists = 0;
2697         session->recent = 0;
2698         session->expunge = 0;
2699         ok = imap_cmd_examine(session, "INBOX",
2700                               &exists, &recent, &unseen, &uid_validity, FALSE);
2701         if (ok != MAILIMAP_NO_ERROR) {
2702                 g_free(real_oldpath);
2703                 return -1;
2704         }
2705
2706         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &ok);
2707         if (is_fatal(ok))
2708                 return -1;
2709         if (strchr(item->path, G_DIR_SEPARATOR)) {
2710                 dirpath = g_path_get_dirname(item->path);
2711                 newpath = g_strconcat(dirpath, G_DIR_SEPARATOR_S, name, NULL);
2712                 g_free(dirpath);
2713         } else
2714                 newpath = g_strdup(name);
2715
2716         real_newpath = imap_utf8_to_modified_utf7(newpath, FALSE);
2717         imap_path_separator_subst(real_newpath, separator);
2718
2719         ok = imap_cmd_rename(session, real_oldpath, real_newpath);
2720         if (ok != MAILIMAP_NO_ERROR) {
2721                 log_warning(LOG_PROTOCOL, _("can't rename mailbox: %s to %s\n"),
2722                             real_oldpath, real_newpath);
2723                 g_free(real_oldpath);
2724                 g_free(newpath);
2725                 g_free(real_newpath);
2726                 return -1;
2727         }
2728         g_free(item->name);
2729         item->name = g_strdup(name);
2730
2731         old_cache_dir = folder_item_get_path(item);
2732
2733         paths[0] = g_strdup(item->path);
2734         paths[1] = newpath;
2735         g_node_traverse(item->node, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
2736                         imap_rename_folder_func, paths);
2737
2738         if (is_dir_exist(old_cache_dir)) {
2739                 new_cache_dir = folder_item_get_path(item);
2740                 if (rename(old_cache_dir, new_cache_dir) < 0) {
2741                         FILE_OP_ERROR(old_cache_dir, "rename");
2742                 }
2743                 g_free(new_cache_dir);
2744         }
2745
2746         g_free(old_cache_dir);
2747         g_free(paths[0]);
2748         g_free(newpath);
2749         g_free(real_oldpath);
2750         g_free(real_newpath);
2751         return 0;
2752 }
2753
2754 gint imap_subscribe(Folder *folder, FolderItem *item, gchar *rpath, gboolean sub)
2755 {
2756         gchar *path;
2757         gint r = -1;
2758         IMAPSession *session;
2759         debug_print("getting session...\n");
2760
2761         session = imap_session_get(folder);
2762         if (!session) {
2763                 return -1;
2764         }
2765         if (item && item->path) {
2766                 path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &r);
2767                 if (!path || is_fatal(r))
2768                         return -1;
2769                 if (!strcmp(path, "INBOX") && sub == FALSE)
2770                         return -1;
2771                 debug_print("%ssubscribing %s\n", sub?"":"un", path);
2772                 r = imap_threaded_subscribe(folder, path, sub);
2773                 g_free(path);
2774         } else if (rpath) {
2775                 r = imap_threaded_subscribe(folder, rpath, sub);
2776         } else
2777                 return -1;
2778         return r;
2779 }
2780
2781 static gint imap_remove_folder_real(Folder *folder, FolderItem *item)
2782 {
2783         gint ok;
2784         IMAPSession *session;
2785         gchar *path;
2786         gchar *cache_dir;
2787         gboolean selected_folder;
2788
2789         g_return_val_if_fail(folder != NULL, -1);
2790         g_return_val_if_fail(item != NULL, -1);
2791         g_return_val_if_fail(item->path != NULL, -1);
2792
2793         debug_print("getting session...\n");
2794         session = imap_session_get(folder);
2795         if (!session) {
2796                 return -1;
2797         }
2798         path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &ok);
2799         if (is_fatal(ok))
2800                 return -1;
2801
2802         imap_threaded_subscribe(folder, path, FALSE);
2803
2804         selected_folder = (session->mbox != NULL) &&
2805                           (!strcmp(session->mbox, item->path));
2806         if (selected_folder) {
2807                 ok = imap_cmd_close(session);
2808                 if (ok != MAILIMAP_NO_ERROR) {
2809                         debug_print("close err %d\n", ok);
2810                         return ok;
2811                 }
2812         }
2813         ok = imap_cmd_delete(session, path);
2814         if (ok != MAILIMAP_NO_ERROR && !is_fatal(ok)) {
2815                 gchar *tmp = g_strdup_printf("%s%c", path,
2816                                 imap_get_path_separator(session, IMAP_FOLDER(folder), path, &ok));
2817                 g_free(path);
2818                 path = tmp;
2819                 if (!is_fatal(ok))
2820                         ok = imap_cmd_delete(session, path);
2821         }
2822
2823         if (ok != MAILIMAP_NO_ERROR) {
2824                 log_warning(LOG_PROTOCOL, _("can't delete mailbox\n"));
2825                 g_free(path);
2826                 return -1;
2827         }
2828
2829         g_free(path);
2830         cache_dir = folder_item_get_path(item);
2831         if (is_dir_exist(cache_dir) && remove_dir_recursive(cache_dir) < 0)
2832                 g_warning("can't remove directory '%s'\n", cache_dir);
2833         g_free(cache_dir);
2834         folder_item_remove(item);
2835         return 0;
2836 }
2837
2838 static gint imap_remove_folder(Folder *folder, FolderItem *item)
2839 {
2840         GNode *node, *next;
2841
2842         g_return_val_if_fail(item != NULL, -1);
2843         g_return_val_if_fail(item->folder != NULL, -1);
2844         g_return_val_if_fail(item->node != NULL, -1);
2845
2846         node = item->node->children;
2847         while (node != NULL) {
2848                 next = node->next;
2849                 if (imap_remove_folder(folder, FOLDER_ITEM(node->data)) < 0)
2850                         return -1;
2851                 node = next;
2852         }
2853         debug_print("IMAP removing %s\n", item->path);
2854
2855         if (imap_remove_all_msg(folder, item) < 0)
2856                 return -1;
2857         return imap_remove_folder_real(folder, item);
2858 }
2859
2860 typedef struct _uncached_data {
2861         IMAPSession *session;
2862         FolderItem *item;
2863         MsgNumberList *numlist;
2864         guint cur;
2865         guint total;
2866         gboolean done;
2867         int ok;
2868 } uncached_data;
2869
2870 static void *imap_get_uncached_messages_thread(void *data)
2871 {
2872         uncached_data *stuff = (uncached_data *)data;
2873         IMAPSession *session = stuff->session;
2874         FolderItem *item = stuff->item;
2875         MsgNumberList *numlist = stuff->numlist;
2876         GSList *newlist = NULL;
2877         GSList *llast = NULL;
2878         GSList *seq_list, *cur;
2879         gboolean got_alien_tags = FALSE;
2880
2881         debug_print("uncached_messages\n");
2882
2883         if (session == NULL || item == NULL || item->folder == NULL
2884             || FOLDER_CLASS(item->folder) != &imap_class) {
2885                 stuff->done = TRUE;
2886                 return NULL;
2887         }
2888
2889         seq_list = imap_get_lep_set_from_numlist(IMAP_FOLDER(item->folder), numlist);
2890         debug_print("get msgs info\n");
2891         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
2892                 struct mailimap_set * imapset;
2893                 unsigned int i;
2894                 int r;
2895                 carray * env_list;
2896                 int count;
2897
2898                 if (session->cancelled)
2899                         break;
2900
2901                 imapset = cur->data;
2902
2903                 r = imap_threaded_fetch_env(session->folder,
2904                                             imapset, &env_list);
2905                 if (r != MAILIMAP_NO_ERROR) {
2906                         imap_handle_error(SESSION(session), r);
2907                         if (is_fatal(r)) {
2908                                 stuff->ok = r;
2909                                 return NULL;
2910                         }
2911                         continue;
2912                 }
2913
2914                 session_set_access_time(SESSION(session));
2915
2916                 count = 0;
2917                 for(i = 0 ; i < carray_count(env_list) ; i += 2) {
2918                         struct imap_fetch_env_info * info;
2919                         MsgInfo * msginfo;
2920                         GSList *tags = NULL, *cur = NULL;
2921                         info = carray_get(env_list, i);
2922                         tags = carray_get(env_list, i+1);
2923                         msginfo = imap_envelope_from_lep(info, item);
2924                         if (msginfo == NULL) {
2925                                 slist_free_strings(tags);
2926                                 g_slist_free(tags);
2927                                 continue;
2928                         }
2929                         if (tags != NULL) {
2930                                 g_slist_free(msginfo->tags);
2931                                 msginfo->tags = NULL;
2932                         }
2933                         for (cur = tags; cur; cur = cur->next) {
2934                                 gchar *real_tag = imap_modified_utf7_to_utf8(cur->data, TRUE);
2935                                 gint id = 0;
2936                                 id = tags_get_id_for_str(real_tag);
2937                                 if (id == -1) {
2938                                         id = tags_add_tag(real_tag);
2939                                         got_alien_tags = TRUE;
2940                                 }
2941                                 if (!g_slist_find(msginfo->tags, GINT_TO_POINTER(id))) {
2942                                         msginfo->tags = g_slist_append(
2943                                                         msginfo->tags,
2944                                                         GINT_TO_POINTER(id));
2945                                 }
2946                                 g_free(real_tag);
2947                         }
2948                         slist_free_strings(tags);
2949                         g_slist_free(tags);
2950                         msginfo->folder = item;
2951                         if (!newlist)
2952                                 llast = newlist = g_slist_append(newlist, msginfo);
2953                         else {
2954                                 llast = g_slist_append(llast, msginfo);
2955                                 llast = llast->next;
2956                         }
2957                         count ++;
2958                 }
2959
2960                 imap_fetch_env_free(env_list);
2961         }
2962
2963         if (got_alien_tags) {
2964                 tags_write_tags();
2965                 main_window_reflect_tags_changes(mainwindow_get_mainwindow());
2966         }
2967
2968         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
2969                 struct mailimap_set * imapset;
2970
2971                 imapset = cur->data;
2972                 mailimap_set_free(imapset);
2973         }
2974
2975         session_set_access_time(SESSION(session));
2976         stuff->done = TRUE;
2977         return newlist;
2978 }
2979
2980 #define MAX_MSG_NUM 50
2981
2982 static GSList *imap_get_uncached_messages(IMAPSession *session,
2983                                         FolderItem *item,
2984                                         MsgNumberList *numlist,
2985                                         int *r)
2986 {
2987         GSList *result = NULL;
2988         GSList * cur;
2989         uncached_data *data = g_new0(uncached_data, 1);
2990         int finished;
2991
2992         finished = 0;
2993         cur = numlist;
2994         data->total = g_slist_length(numlist);
2995         data->ok = MAILIMAP_NO_ERROR;
2996         debug_print("messages list : %i\n", data->total);
2997
2998         while (cur != NULL) {
2999                 GSList * partial_result;
3000                 int count;
3001                 GSList * newlist;
3002                 GSList * llast;
3003
3004                 llast = NULL;
3005                 count = 0;
3006                 newlist = NULL;
3007                 while (count < MAX_MSG_NUM) {
3008                         void * p;
3009
3010                         p = cur->data;
3011
3012                         if (newlist == NULL)
3013                                 llast = newlist = g_slist_append(newlist, p);
3014                         else {
3015                                 llast = g_slist_append(llast, p);
3016                                 llast = llast->next;
3017                         }
3018                         count ++;
3019
3020                         cur = cur->next;
3021                         if (cur == NULL)
3022                                 break;
3023                 }
3024
3025                 data->done = FALSE;
3026                 data->session = session;
3027                 data->item = item;
3028                 data->numlist = newlist;
3029                 data->cur += count;
3030
3031                 if (prefs_common.work_offline &&
3032                     !inc_offline_should_override(FALSE,
3033                         _("Claws Mail needs network access in order "
3034                           "to access the IMAP server."))) {
3035                         g_free(data);
3036                         return NULL;
3037                 }
3038
3039                 partial_result =
3040                         (GSList *)imap_get_uncached_messages_thread(data);
3041                 *r = data->ok;
3042                 if (data->ok != MAILIMAP_NO_ERROR) {
3043                         goto bail;
3044                 }
3045                 statusbar_progress_all(data->cur,data->total, 1);
3046
3047                 g_slist_free(newlist);
3048
3049                 result = g_slist_concat(result, partial_result);
3050         }
3051 bail:
3052         g_free(data);
3053
3054         statusbar_progress_all(0,0,0);
3055         statusbar_pop_all();
3056
3057         return result;
3058 }
3059
3060 static void imap_delete_all_cached_messages(FolderItem *item)
3061 {
3062         gchar *dir;
3063
3064         g_return_if_fail(item != NULL);
3065         g_return_if_fail(item->folder != NULL);
3066         g_return_if_fail(FOLDER_CLASS(item->folder) == &imap_class);
3067
3068         debug_print("Deleting all cached messages...\n");
3069
3070         dir = folder_item_get_path(item);
3071         if (is_dir_exist(dir))
3072                 remove_all_numbered_files(dir);
3073         g_free(dir);
3074
3075         debug_print("done.\n");
3076 }
3077
3078 gchar imap_get_path_separator_for_item(FolderItem *item)
3079 {
3080         Folder *folder = NULL;
3081         IMAPFolder *imap_folder = NULL;
3082         IMAPSession *session = NULL;
3083         gchar result = '/';
3084         gint ok;
3085         if (!item)
3086                 return '/';
3087         folder = item->folder;
3088
3089         if (!folder)
3090                 return '/';
3091
3092         imap_folder = IMAP_FOLDER(folder);
3093
3094         if (!imap_folder)
3095                 return '/';
3096
3097         debug_print("getting session...");
3098         session = imap_session_get(FOLDER(folder));
3099         result = imap_get_path_separator(session, imap_folder, item->path, &ok);
3100         return result;
3101 }
3102
3103 static gchar imap_refresh_path_separator(IMAPSession *session, IMAPFolder *folder, const gchar *subfolder, gint *ok)
3104 {
3105         clist * lep_list;
3106         int r;
3107         gchar separator = '\0';
3108
3109         g_return_val_if_fail(session != NULL, '/');
3110         r = imap_threaded_list((Folder *)folder, "", subfolder, &lep_list);
3111
3112         if (r != MAILIMAP_NO_ERROR) {
3113                 imap_handle_error(SESSION(session), r);
3114                 log_warning(LOG_PROTOCOL, _("LIST failed\n"));
3115                 *ok = r;
3116                 return '\0';
3117         }
3118
3119         if (clist_count(lep_list) > 0) {
3120                 clistiter * iter = clist_begin(lep_list);
3121                 struct mailimap_mailbox_list * mb;
3122                 mb = clist_content(iter);
3123
3124                 separator = mb->mb_delimiter;
3125                 debug_print("got separator: %c\n", folder->last_seen_separator);
3126         }
3127         *ok = MAILIMAP_NO_ERROR;
3128         mailimap_list_result_free(lep_list);
3129         return separator;
3130 }
3131
3132 static gchar imap_get_path_separator(IMAPSession *session, IMAPFolder *folder, const gchar *path, gint *ok)
3133 {
3134         gchar separator = '/';
3135
3136         if (folder->last_seen_separator == 0) {
3137                 folder->last_seen_separator = imap_refresh_path_separator(session, folder, "", ok);
3138         }
3139
3140         if (folder->last_seen_separator == 0) {
3141                 folder->last_seen_separator = imap_refresh_path_separator(session, folder, "INBOX", ok);
3142         }
3143
3144         if (folder->last_seen_separator != 0) {
3145                 debug_print("using separator: %c\n", folder->last_seen_separator);
3146                 return folder->last_seen_separator;
3147         }
3148
3149         return separator;
3150 }
3151
3152 static gchar *imap_get_real_path(IMAPSession *session, IMAPFolder *folder, const gchar *path, gint *ok)
3153 {
3154         gchar *real_path;
3155         gchar separator;
3156
3157         g_return_val_if_fail(folder != NULL, NULL);
3158         g_return_val_if_fail(path != NULL, NULL);
3159
3160         real_path = imap_utf8_to_modified_utf7(path, FALSE);
3161         separator = imap_get_path_separator(session, folder, path, ok);
3162         imap_path_separator_subst(real_path, separator);
3163
3164         return real_path;
3165 }
3166
3167 static gint imap_set_message_flags(IMAPSession *session,
3168                                    IMAPFolderItem *item,
3169                                    MsgNumberList *numlist,
3170                                    IMAPFlags flags,
3171                                    GSList *tags,
3172                                    gboolean is_set)
3173 {
3174         gint ok = 0;
3175         GSList *seq_list;
3176         GSList * cur;
3177         gint total = 0;
3178         IMAPFolder *folder = NULL;
3179         GSList *sorted_list = NULL;
3180
3181         if (numlist == NULL || session == NULL)
3182                 return MAILIMAP_ERROR_BAD_STATE;
3183
3184         folder = IMAP_FOLDER(session->folder);
3185
3186         sorted_list = g_slist_copy(numlist);
3187         sorted_list = g_slist_sort(sorted_list, g_int_compare);
3188
3189         cur = g_slist_last(sorted_list);
3190
3191         if (cur)
3192                 total = GPOINTER_TO_INT(cur->data);
3193
3194         seq_list = imap_get_lep_set_from_numlist(IMAP_FOLDER(session->folder), sorted_list);
3195
3196         statusbar_print_all(_("Flagging messages..."));
3197
3198         for(cur = seq_list ; cur != NULL ; cur = g_slist_next(cur)) {
3199                 struct mailimap_set * imapset = (struct mailimap_set *)cur->data;
3200                 struct mailimap_set_item *set_item = clist_content(
3201                                                         clist_begin(imapset->set_list));
3202
3203                 statusbar_progress_all(set_item->set_first, total, 1);
3204
3205                 ok = imap_cmd_store(session, item, imapset,
3206                                     flags, tags, is_set);
3207                 statusbar_progress_all(set_item->set_last, total, 1);
3208                 if (ok != MAILIMAP_NO_ERROR && folder->max_set_size > 20) {
3209                         /* reduce max set size */
3210                         folder->max_set_size /= 2;
3211                 }
3212                 if (ok != MAILIMAP_NO_ERROR && is_fatal(ok)) {
3213                         break;
3214                 }
3215         }
3216
3217         g_slist_free(sorted_list);
3218
3219         statusbar_progress_all(0,0,0);
3220         statusbar_pop_all();
3221
3222         imap_lep_set_free(seq_list);
3223
3224         return ok;
3225 }
3226
3227 typedef struct _select_data {
3228         IMAPSession *session;
3229         gchar *real_path;
3230         gint *exists;
3231         gint *recent;
3232         gint *unseen;
3233         guint32 *uid_validity;
3234         gboolean done;
3235 } select_data;
3236
3237 static gint imap_select(IMAPSession *session, IMAPFolder *folder,
3238                         FolderItem *item,
3239                         gint *exists, gint *recent, gint *unseen,
3240                         guint32 *uid_validity, gint *can_create_flags,
3241                         gboolean block)
3242 {
3243         gchar *real_path;
3244         gint ok;
3245         gint exists_, recent_, unseen_;
3246         guint32 uid_validity_;
3247         gint can_create_flags_;
3248         const gchar *path = item ? item->path:NULL;
3249
3250         if (!item) {
3251                 return MAILIMAP_ERROR_BAD_STATE;
3252         }
3253
3254         if (!exists && !recent && !unseen && !uid_validity && !can_create_flags) {
3255                 if (session->mbox && strcmp(session->mbox, path) == 0)
3256                         return MAILIMAP_NO_ERROR;
3257         }
3258         if (!exists && !recent && !unseen && !uid_validity && can_create_flags) {
3259                 if (session->mbox && strcmp(session->mbox, path) == 0) {
3260                         if (IMAP_FOLDER_ITEM(item)->can_create_flags != ITEM_CAN_CREATE_FLAGS_UNKNOWN)
3261                                 return MAILIMAP_NO_ERROR;
3262                 }
3263         }
3264         if (!exists)
3265                 exists = &exists_;
3266         if (!recent)
3267                 recent = &recent_;
3268         if (!unseen)
3269                 unseen = &unseen_;
3270         if (!uid_validity)
3271                 uid_validity = &uid_validity_;
3272         if (!can_create_flags)
3273                 can_create_flags = &can_create_flags_;
3274
3275         g_free(session->mbox);
3276         session->mbox = NULL;
3277         session->exists = 0;
3278         session->recent = 0;
3279         session->expunge = 0;
3280
3281         real_path = imap_get_real_path(session, folder, path, &ok);
3282         if (is_fatal(ok))
3283                 return ok;
3284         g_slist_free(IMAP_FOLDER_ITEM(item)->ok_flags);
3285         IMAP_FOLDER_ITEM(item)->ok_flags = NULL;
3286         ok = imap_cmd_select(session, real_path,
3287                              exists, recent, unseen, uid_validity, can_create_flags,
3288                              &(IMAP_FOLDER_ITEM(item)->ok_flags), block);
3289         if (ok != MAILIMAP_NO_ERROR) {
3290                 log_warning(LOG_PROTOCOL, _("can't select folder: %s\n"), real_path);
3291         } else {
3292                 session->mbox = g_strdup(path);
3293                 session->folder_content_changed = FALSE;
3294                 session->exists = *exists;
3295                 session->recent = *recent;
3296                 session->expunge = 0;
3297                 session->unseen = *unseen;
3298                 session->uid_validity = *uid_validity;
3299                 debug_print("select: exists %d recent %d expunge %d uid_validity %d can_create_flags %d\n",
3300                         session->exists, session->recent, session->expunge,
3301                         session->uid_validity, *can_create_flags);
3302         }
3303         if (*can_create_flags) {
3304                 IMAP_FOLDER_ITEM(item)->can_create_flags = ITEM_CAN_CREATE_FLAGS;
3305         } else {
3306                 IMAP_FOLDER_ITEM(item)->can_create_flags = ITEM_CANNOT_CREATE_FLAGS;
3307         }
3308         g_free(real_path);
3309
3310         return ok;
3311 }
3312
3313 static gint imap_status(IMAPSession *session, IMAPFolder *folder,
3314                         const gchar *path, IMAPFolderItem *item,
3315                         gint *messages,
3316                         guint32 *uid_next, guint32 *uid_validity,
3317                         gint *unseen, gboolean block)
3318 {
3319         int r;
3320         clistiter * iter;
3321         struct mailimap_mailbox_data_status * data_status;
3322         int got_values;
3323         gchar *real_path;
3324         guint mask = 0;
3325
3326         real_path = imap_get_real_path(session, folder, path, &r);
3327         if (is_fatal(r))
3328                 return r;
3329
3330         if (messages) {
3331                 mask |= 1 << 0;
3332                 *messages = 0;
3333         }
3334         if (uid_next) {
3335                 mask |= 1 << 2;
3336                 *uid_next = 0;
3337         }
3338         if (uid_validity) {
3339                 mask |= 1 << 3;
3340                 *uid_validity = 0;
3341         }
3342         if (unseen) {
3343                 mask |= 1 << 4;
3344                 *unseen = 0;
3345         }
3346
3347         if (session->mbox != NULL &&
3348             !strcmp(session->mbox, item->item.path)) {
3349                 r = imap_cmd_close(session);
3350                 if (r != MAILIMAP_NO_ERROR) {
3351                         debug_print("close err %d\n", r);
3352                         return r;
3353                 }
3354         }
3355
3356         r = imap_threaded_status(FOLDER(folder), real_path,
3357                 &data_status, mask);
3358
3359         g_free(real_path);
3360         if (r != MAILIMAP_NO_ERROR) {
3361                 imap_handle_error(SESSION(session), r);
3362                 debug_print("status err %d\n", r);
3363                 return r;
3364         }
3365
3366         if (data_status->st_info_list == NULL) {
3367                 mailimap_mailbox_data_status_free(data_status);
3368                 debug_print("status->st_info_list == NULL\n");
3369                 return MAILIMAP_ERROR_BAD_STATE;
3370         }
3371
3372         got_values = 0;
3373         for(iter = clist_begin(data_status->st_info_list) ; iter != NULL ;
3374             iter = clist_next(iter)) {
3375                 struct mailimap_status_info * info;
3376
3377                 info = clist_content(iter);
3378                 switch (info->st_att) {
3379                 case MAILIMAP_STATUS_ATT_MESSAGES:
3380                         if (messages) {
3381                                 * messages = info->st_value;
3382                                 got_values |= 1 << 0;
3383                         }
3384                         break;
3385
3386                 case MAILIMAP_STATUS_ATT_UIDNEXT:
3387                         if (uid_next) {
3388                                 * uid_next = info->st_value;
3389                                 got_values |= 1 << 2;
3390                         }
3391                         break;
3392
3393                 case MAILIMAP_STATUS_ATT_UIDVALIDITY:
3394                         if (uid_validity) {
3395                                 * uid_validity = info->st_value;
3396                                 got_values |= 1 << 3;
3397                         }
3398                         break;
3399
3400                 case MAILIMAP_STATUS_ATT_UNSEEN:
3401                         if (unseen) {
3402                                 * unseen = info->st_value;
3403                                 got_values |= 1 << 4;
3404                         }
3405                         break;
3406                 }
3407         }
3408         mailimap_mailbox_data_status_free(data_status);
3409
3410         if (got_values != mask) {
3411                 g_warning("status: incomplete values received (%d)\n", got_values);
3412         }
3413         return MAILIMAP_NO_ERROR;
3414 }
3415
3416 static void imap_free_capabilities(IMAPSession *session)
3417 {
3418         slist_free_strings(session->capability);
3419         g_slist_free(session->capability);
3420         session->capability = NULL;
3421 }
3422
3423 /* low-level IMAP4rev1 commands */
3424
3425 static gint imap_cmd_login(IMAPSession *session,
3426                            const gchar *user, const gchar *pass,
3427                            const gchar *type)
3428 {
3429         int r;
3430         gint ok;
3431
3432         if (!strcmp(type, "LOGIN") && imap_has_capability(session, "LOGINDISABLED")) {
3433                 gint ok = MAILIMAP_ERROR_BAD_STATE;
3434                 if (imap_has_capability(session, "STARTTLS")) {
3435 #if (defined(USE_OPENSSL) || defined (USE_GNUTLS))
3436                         log_warning(LOG_PROTOCOL, _("Server requires TLS to log in.\n"));
3437                         ok = imap_cmd_starttls(session);
3438                         if (ok != MAILIMAP_NO_ERROR) {
3439                                 log_warning(LOG_PROTOCOL, _("Can't start TLS session.\n"));
3440                                 return ok;
3441                         } else {
3442                                 /* refresh capas */
3443                                 imap_free_capabilities(session);
3444                                 if ((r = imap_get_capabilities(session)) != MAILIMAP_NO_ERROR) {
3445                                         imap_handle_error(SESSION(session), r);
3446                                         log_warning(LOG_PROTOCOL, _("Can't refresh capabilities.\n"));
3447                                         return r;
3448                                 }
3449                         }
3450 #else
3451                         log_error(LOG_PROTOCOL, _("Connection to %s failed: "
3452                                         "server requires TLS, but Claws Mail "
3453                                         "has been compiled without OpenSSL "
3454                                         "support.\n"),
3455                                         SESSION(session)->server);
3456                         return MAILIMAP_ERROR_LOGIN;
3457 #endif
3458                 } else {
3459                         log_error(LOG_PROTOCOL, _("Server logins are disabled.\n"));
3460                         return MAILIMAP_ERROR_LOGIN;
3461                 }
3462         }
3463
3464         log_print(LOG_PROTOCOL, "IMAP4> Logging %s to %s using %s\n",
3465                         user,
3466                         SESSION(session)->server,
3467                         type);
3468         r = imap_threaded_login(session->folder, user, pass, type);
3469         if (r != MAILIMAP_NO_ERROR) {
3470                 imap_handle_error(SESSION(session), r);
3471                 log_print(LOG_PROTOCOL, "IMAP4< Error logging in to %s\n",
3472                                 SESSION(session)->server);
3473                 ok = r;
3474         } else {
3475                 log_print(LOG_PROTOCOL, "IMAP4< Login to %s successful\n",
3476                                 SESSION(session)->server);
3477                 ok = MAILIMAP_NO_ERROR;
3478         }
3479         return ok;
3480 }
3481
3482 static gint imap_cmd_noop(IMAPSession *session)
3483 {
3484         int r;
3485         unsigned int exists, recent, expunge, unseen, uidnext, uidval;
3486
3487         r = imap_threaded_noop(session->folder, &exists, &recent, &expunge, &unseen, &uidnext, &uidval);
3488         if (r != MAILIMAP_NO_ERROR) {
3489                 imap_handle_error(SESSION(session), r);
3490                 debug_print("noop err %d\n", r);
3491                 return r;
3492         }
3493
3494         session->folder_content_changed = FALSE;
3495
3496         if ((exists && exists != session->exists)
3497          || (recent && recent != session->recent)
3498          || (expunge && expunge != session->expunge)
3499          || (unseen && unseen != session->unseen)) {
3500                 session->folder_content_changed = TRUE;
3501         }
3502         if (uidnext != 0 && uidnext != session->uid_next) {
3503                 session->uid_next = uidnext;
3504                 session->folder_content_changed = TRUE;
3505         }
3506         if (uidval != 0 && uidval != session->uid_validity) {
3507                 session->uid_validity = uidval;
3508                 session->folder_content_changed = TRUE;
3509         }
3510
3511         session->exists = exists;
3512         session->recent = recent;
3513         session->expunge = expunge;
3514         session->unseen = unseen;
3515
3516         session_set_access_time(SESSION(session));
3517
3518         return MAILIMAP_NO_ERROR;
3519 }
3520
3521 #if (defined(USE_OPENSSL) || defined (USE_GNUTLS))
3522 static gint imap_cmd_starttls(IMAPSession *session)
3523 {
3524         int r;
3525
3526         r = imap_threaded_starttls(session->folder,
3527                 SESSION(session)->server, SESSION(session)->port);
3528         if (r != MAILIMAP_NO_ERROR) {
3529                 imap_handle_error(SESSION(session), r);
3530                 debug_print("starttls err %d\n", r);
3531                 return r;
3532         }
3533         return MAILIMAP_NO_ERROR;
3534 }
3535 #endif
3536
3537 static gint imap_cmd_select(IMAPSession *session, const gchar *folder,
3538                             gint *exists, gint *recent, gint *unseen,
3539                             guint32 *uid_validity, gint *can_create_flags,
3540                             GSList **ok_flags, gboolean block)
3541 {
3542         int r;
3543
3544         r = imap_threaded_select(session->folder, folder,
3545                                  exists, recent, unseen, uid_validity, can_create_flags, ok_flags);
3546         if (r != MAILIMAP_NO_ERROR) {
3547                 imap_handle_error(SESSION(session), r);
3548                 debug_print("select err %d\n", r);
3549                 return r;
3550         }
3551         return MAILIMAP_NO_ERROR;
3552 }
3553
3554 static gint imap_cmd_close(IMAPSession *session)
3555 {
3556         int r;
3557
3558         r = imap_threaded_close(session->folder);
3559         if (r != MAILIMAP_NO_ERROR) {
3560                 imap_handle_error(SESSION(session), r);
3561                 debug_print("close err %d\n", r);
3562                 return r;
3563         }
3564         g_free(session->mbox);
3565         session->mbox = NULL;
3566         session->exists = 0;
3567         session->recent = 0;
3568         session->expunge = 0;
3569         return MAILIMAP_NO_ERROR;
3570 }
3571
3572 static gint imap_cmd_examine(IMAPSession *session, const gchar *folder,
3573                              gint *exists, gint *recent, gint *unseen,
3574                              guint32 *uid_validity, gboolean block)
3575 {
3576         int r;
3577
3578         r = imap_threaded_examine(session->folder, folder,
3579                                   exists, recent, unseen, uid_validity);
3580         if (r != MAILIMAP_NO_ERROR) {
3581                 imap_handle_error(SESSION(session), r);
3582                 debug_print("examine err %d\n", r);
3583
3584                 return r;
3585         }
3586         return MAILIMAP_NO_ERROR;
3587 }
3588
3589 static gint imap_cmd_create(IMAPSession *session, const gchar *folder)
3590 {
3591         int r;
3592
3593         r = imap_threaded_create(session->folder, folder);
3594         if (r != MAILIMAP_NO_ERROR) {
3595                 imap_handle_error(SESSION(session), r);
3596                 return r;
3597         }
3598
3599         return MAILIMAP_NO_ERROR;
3600 }
3601
3602 static gint imap_cmd_rename(IMAPSession *session, const gchar *old_folder,
3603                             const gchar *new_folder)
3604 {
3605         int r;
3606
3607         r = imap_threaded_rename(session->folder, old_folder,
3608                                  new_folder);
3609         if (r != MAILIMAP_NO_ERROR) {
3610                 imap_handle_error(SESSION(session), r);
3611                 return r;
3612         }
3613
3614         return MAILIMAP_NO_ERROR;
3615 }
3616
3617 static gint imap_cmd_delete(IMAPSession *session, const gchar *folder)
3618 {
3619         int r;
3620
3621
3622         r = imap_threaded_delete(session->folder, folder);
3623         if (r != MAILIMAP_NO_ERROR) {
3624                 imap_handle_error(SESSION(session), r);
3625                 return r;
3626         }
3627
3628         return MAILIMAP_NO_ERROR;
3629 }
3630
3631 typedef struct _fetch_data {
3632         IMAPSession *session;
3633         guint32 uid;
3634         const gchar *filename;
3635         gboolean headers;
3636         gboolean body;
3637         gboolean done;
3638 } fetch_data;
3639
3640 static void *imap_cmd_fetch_thread(void *data)
3641 {
3642         fetch_data *stuff = (fetch_data *)data;
3643         IMAPSession *session = stuff->session;
3644         guint32 uid = stuff->uid;
3645         const gchar *filename = stuff->filename;
3646         int r;
3647
3648         if (stuff->body) {
3649                 r = imap_threaded_fetch_content(session->folder,
3650                                                uid, 1, filename);
3651         }
3652         else {
3653                 r = imap_threaded_fetch_content(session->folder,
3654                                                 uid, 0, filename);
3655         }
3656         if (r != MAILIMAP_NO_ERROR) {
3657                 imap_handle_error(SESSION(session), r);
3658                 debug_print("fetch err %d\n", r);
3659                 return GINT_TO_POINTER(r);
3660         }
3661         return GINT_TO_POINTER(MAILIMAP_NO_ERROR);
3662 }
3663
3664 static gint imap_cmd_fetch(IMAPSession *session, guint32 uid,
3665                                 const gchar *filename, gboolean headers,
3666                                 gboolean body)
3667 {
3668         fetch_data *data = g_new0(fetch_data, 1);
3669         int result = 0;
3670         data->done = FALSE;
3671         data->session = session;
3672         data->uid = uid;
3673         data->filename = filename;
3674         data->headers = headers;
3675         data->body = body;
3676
3677         if (prefs_common.work_offline &&
3678             !inc_offline_should_override(FALSE,
3679                 _("Claws Mail needs network access in order "
3680                   "to access the IMAP server."))) {
3681                 g_free(data);
3682                 return -1;
3683         }
3684         statusbar_print_all(_("Fetching message..."));
3685         result = GPOINTER_TO_INT(imap_cmd_fetch_thread(data));
3686         statusbar_pop_all();
3687         g_free(data);
3688         return result;
3689 }
3690
3691
3692 static gint imap_cmd_append(IMAPSession *session,
3693                             IMAPFolderItem *item,
3694                             const gchar *destfolder,
3695                             const gchar *file, IMAPFlags flags,
3696                             guint32 *new_uid)
3697 {
3698         struct mailimap_flag_list * flag_list;
3699         int r;
3700
3701         g_return_val_if_fail(file != NULL, MAILIMAP_ERROR_BAD_STATE);
3702
3703         flag_list = imap_flag_to_lep(item, flags, NULL);
3704         lock_session(session);
3705         r = imap_threaded_append(session->folder, destfolder,
3706                          file, flag_list, (int *)new_uid);
3707         mailimap_flag_list_free(flag_list);
3708
3709         if (r != MAILIMAP_NO_ERROR) {
3710                 imap_handle_error(SESSION(session), r);
3711                 debug_print("append err %d\n", r);
3712                 return r;
3713         }
3714
3715         unlock_session(session);
3716
3717         return MAILIMAP_NO_ERROR;
3718 }
3719
3720 static gint imap_cmd_copy(IMAPSession *session, struct mailimap_set * set,
3721                           const gchar *destfolder, GRelation *uid_mapping,
3722                           struct mailimap_set **source, struct mailimap_set **dest)
3723 {
3724         int r;
3725
3726         g_return_val_if_fail(session != NULL, MAILIMAP_ERROR_BAD_STATE);
3727         g_return_val_if_fail(set != NULL, MAILIMAP_ERROR_BAD_STATE);
3728         g_return_val_if_fail(destfolder != NULL, MAILIMAP_ERROR_BAD_STATE);
3729
3730         r = imap_threaded_copy(session->folder, set, destfolder, source, dest);
3731         if (r != MAILIMAP_NO_ERROR) {
3732                 imap_handle_error(SESSION(session), r);
3733                 return r;
3734         }
3735
3736         return MAILIMAP_NO_ERROR;
3737 }
3738
3739 static gint imap_cmd_store(IMAPSession *session,
3740                            IMAPFolderItem *item,
3741                            struct mailimap_set * set,
3742                            IMAPFlags flags, GSList *tags, int do_add)
3743 {
3744         int r;
3745         struct mailimap_flag_list * flag_list = NULL;
3746         struct mailimap_store_att_flags * store_att_flags;
3747
3748         flag_list = imap_flag_to_lep(item, flags, tags);
3749
3750         if (do_add)
3751                 store_att_flags =
3752                         mailimap_store_att_flags_new_add_flags_silent(flag_list);
3753         else
3754                 store_att_flags =
3755                         mailimap_store_att_flags_new_remove_flags_silent(flag_list);
3756
3757         r = imap_threaded_store(session->folder, set, store_att_flags);
3758         mailimap_store_att_flags_free(store_att_flags);
3759         if (r != MAILIMAP_NO_ERROR) {
3760                 imap_handle_error(SESSION(session), r);
3761                 return r;
3762         }
3763
3764         return MAILIMAP_NO_ERROR;
3765 }
3766
3767 static gint imap_cmd_expunge(IMAPSession *session)
3768 {
3769         int r;
3770
3771         if (prefs_common.work_offline &&
3772             !inc_offline_should_override(FALSE,
3773                 _("Claws Mail needs network access in order "
3774                   "to access the IMAP server."))) {
3775                 return -1;
3776         }
3777
3778         r = imap_threaded_expunge(session->folder);
3779         if (r != MAILIMAP_NO_ERROR) {
3780                 imap_handle_error(SESSION(session), r);
3781                 return r;
3782         }
3783
3784         return MAILIMAP_NO_ERROR;
3785 }
3786
3787 static void imap_path_separator_subst(gchar *str, gchar separator)
3788 {
3789         gchar *p;
3790         gboolean in_escape = FALSE;
3791
3792         if (!separator || separator == '/') return;
3793
3794         for (p = str; *p != '\0'; p++) {
3795                 if (*p == '/' && !in_escape)
3796                         *p = separator;
3797                 else if (*p == '&' && *(p + 1) != '-' && !in_escape)
3798                         in_escape = TRUE;
3799                 else if (*p == '-' && in_escape)
3800                         in_escape = FALSE;
3801         }
3802 }
3803
3804 static gboolean imap_rename_folder_func(GNode *node, gpointer data)
3805 {
3806         FolderItem *item = node->data;
3807         gchar **paths = data;
3808         const gchar *oldpath = paths[0];
3809         const gchar *newpath = paths[1];
3810         gchar *real_oldpath, *real_newpath;
3811         gchar *base;
3812         gchar *new_itempath;
3813         gint oldpathlen;
3814         IMAPSession *session = imap_session_get(item->folder);
3815         gint ok;
3816         oldpathlen = strlen(oldpath);
3817         if (strncmp(oldpath, item->path, oldpathlen) != 0) {
3818                 g_warning("path doesn't match: %s, %s\n", oldpath, item->path);
3819                 return TRUE;
3820         }
3821
3822         base = item->path + oldpathlen;
3823         while (*base == G_DIR_SEPARATOR) base++;
3824         if (*base == '\0')
3825                 new_itempath = g_strdup(newpath);
3826         else
3827                 new_itempath = g_strconcat(newpath, G_DIR_SEPARATOR_S, base,
3828                                            NULL);
3829
3830         real_oldpath = imap_get_real_path(session, IMAP_FOLDER(item->folder), item->path, &ok);
3831         g_free(item->path);
3832         item->path = new_itempath;
3833
3834         real_newpath = imap_get_real_path(session, IMAP_FOLDER(item->folder), item->path, &ok);
3835
3836         imap_threaded_subscribe(item->folder, real_oldpath, FALSE);
3837         imap_threaded_subscribe(item->folder, real_newpath, TRUE);
3838
3839         g_free(real_oldpath);
3840         g_free(real_newpath);
3841         return FALSE;
3842 }
3843
3844 static gint get_list_of_uids(IMAPSession *session, Folder *folder, IMAPFolderItem *item, GSList **msgnum_list)
3845 {
3846         GSList *uidlist, *elem;
3847         int r = -1;
3848         clist * lep_uidlist;
3849         gint ok, nummsgs = 0, lastuid_old;
3850
3851         if (session == NULL) {
3852                 return -1;
3853         }
3854
3855         ok = imap_select(session, IMAP_FOLDER(folder), FOLDER_ITEM(item),
3856                          NULL, NULL, NULL, NULL, NULL, TRUE);
3857         if (ok != MAILIMAP_NO_ERROR) {
3858                 return -1;
3859         }
3860
3861         g_slist_free(item->uid_list);
3862         item->uid_list = NULL;
3863
3864         uidlist = NULL;
3865
3866         if (folder->account && folder->account->low_bandwidth) {
3867                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SIMPLE, NULL,
3868                                  &lep_uidlist);
3869         }
3870
3871         if (r == MAILIMAP_NO_ERROR) {
3872                 GSList * fetchuid_list =
3873                         imap_uid_list_from_lep(lep_uidlist);
3874                 mailimap_search_result_free(lep_uidlist);
3875
3876                 uidlist = g_slist_concat(fetchuid_list, uidlist);
3877         } else {
3878                 carray * lep_uidtab;
3879                 if (r != -1) { /* inited */
3880                         imap_handle_error(SESSION(session), r);
3881                         if (is_fatal(r))
3882                                 return -1;
3883                 }
3884                 r = imap_threaded_fetch_uid(folder, 1,
3885                                     &lep_uidtab);
3886                 if (r == MAILIMAP_NO_ERROR) {
3887                         GSList * fetchuid_list =
3888                                 imap_uid_list_from_lep_tab(lep_uidtab);
3889                         imap_fetch_uid_list_free(lep_uidtab);
3890                         uidlist = g_slist_concat(fetchuid_list, uidlist);
3891                 }
3892         }
3893
3894         if (r != MAILIMAP_NO_ERROR) {
3895                 imap_handle_error(SESSION(session), r);
3896                 return -1;
3897         }
3898
3899         lastuid_old = item->lastuid;
3900
3901         for (elem = uidlist; elem != NULL; elem = g_slist_next(elem)) {
3902                 guint msgnum;
3903
3904                 msgnum = GPOINTER_TO_INT(elem->data);
3905
3906                 *msgnum_list = g_slist_prepend(*msgnum_list, GINT_TO_POINTER(msgnum));
3907                 item->uid_list = g_slist_prepend(item->uid_list, GINT_TO_POINTER(msgnum));
3908                 nummsgs++;
3909         }
3910         g_slist_free(uidlist);
3911
3912         unlock_session(session); /* locked from imap_get_num_list */
3913
3914         return nummsgs;
3915
3916 }
3917
3918 gint imap_get_num_list(Folder *folder, FolderItem *_item, GSList **msgnum_list, gboolean *old_uids_valid)
3919 {
3920         IMAPFolderItem *item = (IMAPFolderItem *)_item;
3921         IMAPSession *session;
3922         gint nummsgs;
3923         GSList *uidlist = NULL;
3924         gchar *dir;
3925         gboolean selected_folder;
3926         gint known_list_len = 0;
3927         debug_print("get_num_list\n");
3928
3929         g_return_val_if_fail(folder != NULL, -1);
3930         g_return_val_if_fail(item != NULL, -1);
3931         g_return_val_if_fail(item->item.path != NULL, -1);
3932         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
3933         g_return_val_if_fail(folder->account != NULL, -1);
3934
3935         known_list_len = g_slist_length(item->uid_list);
3936         if (!item->should_update) {
3937                 debug_print("get_num_list: nothing to update\n");
3938                 *old_uids_valid = TRUE;
3939                 if (known_list_len == item->item.total_msgs
3940                  && known_list_len > 0) {
3941                         *msgnum_list = g_slist_copy(item->uid_list);
3942                         return known_list_len;
3943                 } else {
3944                         debug_print("don't know the list length...\n");
3945                 }
3946         }
3947
3948         if (prefs_common.work_offline &&
3949             !inc_offline_should_override(FALSE,
3950                 _("Claws Mail needs network access in order "
3951                   "to access the IMAP server."))) {
3952                 return -1;
3953         }
3954
3955         debug_print("getting session...\n");
3956         session = imap_session_get(folder);
3957         g_return_val_if_fail(session != NULL, -1);
3958
3959         lock_session(session); /* unlocked by get_list_of_uids */
3960         if (FOLDER_ITEM(item)->path)
3961                 statusbar_print_all(_("Scanning folder %s%c%s ..."),
3962                                       FOLDER_ITEM(item)->folder->name,
3963                                       G_DIR_SEPARATOR,
3964                                       FOLDER_ITEM(item)->path);
3965         else
3966                 statusbar_print_all(_("Scanning folder %s ..."),
3967                                       FOLDER_ITEM(item)->folder->name);
3968
3969         selected_folder = (session->mbox != NULL) &&
3970                           (!strcmp(session->mbox, item->item.path));
3971
3972         if (item->should_trash_cache) {
3973                 *old_uids_valid = FALSE;
3974                 debug_print("get_num_list: trashing num list\n");
3975                 debug_print("Freeing imap uid cache\n");
3976                 item->lastuid = 0;
3977                 g_slist_free(item->uid_list);
3978                 item->uid_list = NULL;
3979
3980                 imap_delete_all_cached_messages((FolderItem *)item);
3981         } else {
3982                 debug_print("get_num_list: updating num list\n");
3983                 *old_uids_valid = TRUE;
3984         }
3985
3986         nummsgs = get_list_of_uids(session, folder, item, &uidlist);
3987         /* session could be broken now, in case of fatal error */
3988
3989         debug_print("get_num_list: got %d msgs\n", nummsgs);
3990
3991         if (nummsgs < 0) {
3992                 statusbar_pop_all();
3993                 return -1;
3994         }
3995
3996         *msgnum_list = uidlist;
3997
3998         dir = folder_item_get_path((FolderItem *)item);
3999         debug_print("removing old messages from %s\n", dir);
4000         remove_numbered_files_not_in_list(dir, *msgnum_list);
4001         g_free(dir);
4002
4003         debug_print("get_num_list - ok - %i\n", nummsgs);
4004         statusbar_pop_all();
4005         item->should_trash_cache = FALSE;
4006         item->should_update = FALSE;
4007         return nummsgs;
4008 }
4009
4010 static MsgInfo *imap_parse_msg(const gchar *file, FolderItem *item)
4011 {
4012         MsgInfo *msginfo;
4013         MsgFlags flags;
4014
4015         flags.perm_flags = MSG_NEW|MSG_UNREAD;
4016         flags.tmp_flags = 0;
4017
4018         g_return_val_if_fail(item != NULL, NULL);
4019         g_return_val_if_fail(file != NULL, NULL);
4020
4021         if (folder_has_parent_of_type(item, F_QUEUE)) {
4022                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
4023         } else if (folder_has_parent_of_type(item, F_DRAFT)) {
4024                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
4025         }
4026
4027         msginfo = procheader_parse_file(file, flags, FALSE, FALSE);
4028         if (!msginfo) return NULL;
4029
4030         msginfo->plaintext_file = g_strdup(file);
4031         msginfo->folder = item;
4032
4033         return msginfo;
4034 }
4035
4036 GSList *imap_get_msginfos(Folder *folder, FolderItem *item,
4037                           GSList *msgnum_list)
4038 {
4039         IMAPSession *session;
4040         MsgInfoList *ret = NULL;
4041         gint ok;
4042
4043         debug_print("get_msginfos\n");
4044
4045         g_return_val_if_fail(folder != NULL, NULL);
4046         g_return_val_if_fail(item != NULL, NULL);
4047         g_return_val_if_fail(msgnum_list != NULL, NULL);
4048
4049         debug_print("getting session...\n");
4050         session = imap_session_get(folder);
4051         g_return_val_if_fail(session != NULL, NULL);
4052
4053         lock_session(session); /* unlocked later in the function */
4054
4055         debug_print("IMAP getting msginfos\n");
4056         ok = imap_select(session, IMAP_FOLDER(folder), item,
4057                          NULL, NULL, NULL, NULL, NULL, FALSE);
4058         if (ok != MAILIMAP_NO_ERROR) {
4059                 return NULL;
4060         }
4061         if (!(folder_has_parent_of_type(item, F_DRAFT) ||
4062               folder_has_parent_of_type(item, F_QUEUE))) {
4063                 ret = g_slist_concat(ret,
4064                         imap_get_uncached_messages(session, item,
4065                                                    msgnum_list, &ok));
4066                 if (ok != MAILIMAP_NO_ERROR)
4067                         return NULL;
4068                 unlock_session(session);
4069         } else {
4070                 MsgNumberList *sorted_list, *elem, *llast = NULL;
4071                 gint startnum, lastnum;
4072
4073                 unlock_session(session);
4074
4075                 sorted_list = g_slist_sort(g_slist_copy(msgnum_list), g_int_compare);
4076
4077                 startnum = lastnum = GPOINTER_TO_INT(sorted_list->data);
4078
4079                 llast = g_slist_last(ret);
4080                 for (elem = sorted_list;; elem = g_slist_next(elem)) {
4081                         guint num = 0;
4082
4083                         if (elem)
4084                                 num = GPOINTER_TO_INT(elem->data);
4085
4086                         if (num > lastnum + 1 || elem == NULL) {
4087                                 int i;
4088                                 for (i = startnum; i <= lastnum; ++i) {
4089                                         gchar *file;
4090                                         file = imap_fetch_msg(folder, item, i);
4091                                         if (file != NULL) {
4092                                                 MsgInfo *msginfo = imap_parse_msg(file, item);
4093                                                 if (msginfo != NULL) {
4094                                                         msginfo->msgnum = i;
4095                                                         if (llast == NULL)
4096                                                                 llast = ret = g_slist_append(ret, msginfo);
4097                                                         else {
4098                                                                 llast = g_slist_append(llast, msginfo);
4099                                                                 llast = llast->next;
4100                                                         }
4101                                                 }
4102                                                 g_free(file);
4103                                         }
4104                                 }
4105
4106                                 if (elem == NULL)
4107                                         break;
4108
4109                                 startnum = num;
4110                         }
4111                         lastnum = num;
4112                 }
4113
4114                 g_slist_free(sorted_list);
4115         }
4116         return ret;
4117 }
4118
4119 MsgInfo *imap_get_msginfo(Folder *folder, FolderItem *item, gint uid)
4120 {
4121         MsgInfo *msginfo = NULL;
4122         MsgInfoList *msginfolist;
4123         MsgNumberList numlist;
4124
4125         numlist.next = NULL;
4126         numlist.data = GINT_TO_POINTER(uid);
4127
4128         msginfolist = imap_get_msginfos(folder, item, &numlist);
4129         if (msginfolist != NULL) {
4130                 msginfo = msginfolist->data;
4131                 g_slist_free(msginfolist);
4132         }
4133
4134         return msginfo;
4135 }
4136
4137 gboolean imap_scan_required(Folder *folder, FolderItem *_item)
4138 {
4139         IMAPSession *session;
4140         IMAPFolderItem *item = (IMAPFolderItem *)_item;
4141         gint ok, exists = 0, unseen = 0;
4142         guint32 uid_next = 0, uid_val = 0;
4143         gboolean selected_folder;
4144
4145         g_return_val_if_fail(folder != NULL, FALSE);
4146         g_return_val_if_fail(item != NULL, FALSE);
4147         g_return_val_if_fail(item->item.folder != NULL, FALSE);
4148         g_return_val_if_fail(FOLDER_CLASS(item->item.folder) == &imap_class, FALSE);
4149
4150         if (item->item.path == NULL)
4151                 return FALSE;
4152
4153         if (item->should_update) {
4154                 debug_print("scan already required\n");
4155                 return TRUE;
4156         }
4157         debug_print("getting session...\n");
4158         session = imap_session_get(folder);
4159
4160         g_return_val_if_fail(session != NULL, FALSE);
4161         lock_session(session); /* unlocked later in the function */
4162
4163         selected_folder = (session->mbox != NULL) &&
4164                           (!strcmp(session->mbox, item->item.path));
4165         if (selected_folder) {
4166                 if (!session->folder_content_changed) {
4167                         ok = imap_cmd_noop(session);
4168                         if (ok != MAILIMAP_NO_ERROR) {
4169                                 debug_print("disconnected!\n");
4170                                 if (!is_fatal(ok))
4171                                         session = imap_reconnect_if_possible(folder, session);
4172                                 else
4173                                         session = imap_session_get(folder);
4174                                 if (session == NULL)
4175                                         return FALSE;
4176                         }
4177
4178                         if (session->folder_content_changed) {
4179                                 debug_print("CHANGED (self-noop)! scan_required\n");
4180                                 item->should_update = TRUE;
4181                                 if (session->uid_validity && session->uid_validity != item->item.mtime) {
4182                                         item->item.mtime = session->uid_validity;
4183                                         item->should_trash_cache = TRUE;
4184                                 }
4185                                 unlock_session(session);
4186                                 return TRUE;
4187                         }
4188                 } else {
4189                         debug_print("CHANGED (previous noop)! scan_required\n");
4190                         item->should_update = TRUE;
4191                         if (session->uid_validity && session->uid_validity != item->item.mtime) {
4192                                 item->item.mtime = session->uid_validity;
4193                                 item->should_trash_cache = TRUE;
4194                         }
4195                         unlock_session(session);
4196                         return TRUE;
4197                 }
4198         } else {
4199                 ok = imap_status(session, IMAP_FOLDER(folder), item->item.path, IMAP_FOLDER_ITEM(item),
4200                                  &exists, &uid_next, &uid_val, &unseen, FALSE);
4201                 if (ok != MAILIMAP_NO_ERROR) {
4202                         return FALSE;
4203                 }
4204
4205                 debug_print("exists %d, item->item.total_msgs %d\n",
4206                         exists, item->item.total_msgs);
4207                 if (exists != item->item.total_msgs
4208                     || unseen != item->item.unread_msgs
4209                     || uid_next != item->uid_next
4210                     || uid_val != item->item.mtime) {
4211                         debug_print("CHANGED (status)! scan_required\n");
4212                         item->last_change = time(NULL);
4213                         item->should_update = TRUE;
4214                         item->uid_next = uid_next;
4215                         if (uid_val != item->item.mtime) {
4216                                 item->item.mtime = uid_val;
4217                                 item->should_trash_cache = TRUE;
4218                         }
4219                         unlock_session(session);
4220                         return TRUE;
4221                 }
4222         }
4223         unlock_session(session);
4224
4225         item->should_update = FALSE;
4226         return FALSE;
4227 }
4228
4229 void imap_change_flags(Folder *folder, FolderItem *item, MsgInfo *msginfo, MsgPermFlags newflags)
4230 {
4231         IMAPSession *session;
4232         IMAPFlags flags_set = 0, flags_unset = 0;
4233         gint ok = MAILIMAP_NO_ERROR;
4234         MsgNumberList numlist;
4235         hashtable_data *ht_data = NULL;
4236
4237         g_return_if_fail(folder != NULL);
4238         g_return_if_fail(folder->klass == &imap_class);
4239         g_return_if_fail(item != NULL);
4240         g_return_if_fail(item->folder == folder);
4241         g_return_if_fail(msginfo != NULL);
4242         g_return_if_fail(msginfo->folder == item);
4243
4244         if (!MSG_IS_MARKED(msginfo->flags) &&  (newflags & MSG_MARKED))
4245                 flags_set |= IMAP_FLAG_FLAGGED;
4246         if ( MSG_IS_MARKED(msginfo->flags) && !(newflags & MSG_MARKED))
4247                 flags_unset |= IMAP_FLAG_FLAGGED;
4248
4249         if (!MSG_IS_UNREAD(msginfo->flags) &&  (newflags & MSG_UNREAD))
4250                 flags_unset |= IMAP_FLAG_SEEN;
4251         if ( MSG_IS_UNREAD(msginfo->flags) && !(newflags & MSG_UNREAD))
4252                 flags_set |= IMAP_FLAG_SEEN;
4253
4254         if (!MSG_IS_REPLIED(msginfo->flags) &&  (newflags & MSG_REPLIED))
4255                 flags_set |= IMAP_FLAG_ANSWERED;
4256         if ( MSG_IS_REPLIED(msginfo->flags) && !(newflags & MSG_REPLIED))
4257                 flags_unset |= IMAP_FLAG_ANSWERED;
4258
4259         if (!MSG_IS_FORWARDED(msginfo->flags) &&  (newflags & MSG_FORWARDED))
4260                 flags_set |= IMAP_FLAG_FORWARDED;
4261         if ( MSG_IS_FORWARDED(msginfo->flags) && !(newflags & MSG_FORWARDED))
4262                 flags_unset |= IMAP_FLAG_FORWARDED;
4263
4264         if (!MSG_IS_SPAM(msginfo->flags) &&  (newflags & MSG_SPAM)) {
4265                 flags_set |= IMAP_FLAG_SPAM;
4266                 flags_unset |= IMAP_FLAG_HAM;
4267         }
4268         if ( MSG_IS_SPAM(msginfo->flags) && !(newflags & MSG_SPAM)) {
4269                 flags_set |= IMAP_FLAG_HAM;
4270                 flags_unset |= IMAP_FLAG_SPAM;
4271         }
4272         if (!MSG_IS_DELETED(msginfo->flags) &&  (newflags & MSG_DELETED))
4273                 flags_set |= IMAP_FLAG_DELETED;
4274         if ( MSG_IS_DELETED(msginfo->flags) && !(newflags & MSG_DELETED))
4275                 flags_unset |= IMAP_FLAG_DELETED;
4276
4277         if (!flags_set && !flags_unset) {
4278                 /* the changed flags were not translatable to IMAP-speak.
4279                  * like MSG_POSTFILTERED, so just apply. */
4280                 msginfo->flags.perm_flags = newflags;
4281                 return;
4282         }
4283
4284         debug_print("getting session...\n");
4285         session = imap_session_get(folder);
4286         if (!session) {
4287                 return;
4288         }
4289
4290         if ((ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
4291             NULL, NULL, NULL, NULL, NULL, FALSE)) != MAILIMAP_NO_ERROR) {
4292                 return;
4293         }
4294         numlist.next = NULL;
4295         numlist.data = GINT_TO_POINTER(msginfo->msgnum);
4296
4297         if (IMAP_FOLDER_ITEM(item)->batching) {
4298                 /* instead of performing an UID STORE command for each message change,
4299                  * as a lot of them can change "together", we just fill in hashtables
4300                  * and defer the treatment so that we're able to send only one
4301                  * command.
4302                  */
4303                 debug_print("IMAP batch mode on, deferring flags change\n");
4304                 if (flags_set) {
4305                         ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->flags_set_table,
4306                                 GINT_TO_POINTER(flags_set));
4307                         if (ht_data == NULL) {
4308                                 ht_data = g_new0(hashtable_data, 1);
4309                                 ht_data->item = IMAP_FOLDER_ITEM(item);
4310                                 g_hash_table_insert(IMAP_FOLDER_ITEM(item)->flags_set_table,
4311                                         GINT_TO_POINTER(flags_set), ht_data);
4312                         }
4313                         ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
4314                 }
4315                 if (flags_unset) {
4316                         ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->flags_unset_table,
4317                                 GINT_TO_POINTER(flags_unset));
4318                         if (ht_data == NULL) {
4319                                 ht_data = g_new0(hashtable_data, 1);
4320                                 ht_data->item = IMAP_FOLDER_ITEM(item);
4321                                 g_hash_table_insert(IMAP_FOLDER_ITEM(item)->flags_unset_table,
4322                                         GINT_TO_POINTER(flags_unset), ht_data);
4323                         }
4324                         ht_data->msglist = g_slist_prepend(ht_data->msglist,
4325                                         GINT_TO_POINTER(msginfo->msgnum));
4326                 }
4327         } else {
4328                 debug_print("IMAP changing flags\n");
4329                 if (flags_set) {
4330                         ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item), &numlist, flags_set, NULL, TRUE);
4331                         if (ok != MAILIMAP_NO_ERROR) {
4332                                 return;
4333                         }
4334                 }
4335
4336                 if (flags_unset) {
4337                         ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item), &numlist, flags_unset, NULL, FALSE);
4338                         if (ok != MAILIMAP_NO_ERROR) {
4339                                 return;
4340                         }
4341                 }
4342         }
4343         msginfo->flags.perm_flags = newflags;
4344         return;
4345 }
4346
4347 static gint imap_remove_msg(Folder *folder, FolderItem *item, gint uid)
4348 {
4349         gint ok;
4350         IMAPSession *session;
4351         gchar *dir;
4352         MsgNumberList numlist;
4353
4354         g_return_val_if_fail(folder != NULL, -1);
4355         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
4356         g_return_val_if_fail(item != NULL, -1);
4357
4358         debug_print("getting session...\n");
4359         session = imap_session_get(folder);
4360         if (!session) return -1;
4361
4362         ok = imap_select(session, IMAP_FOLDER(folder), item,
4363                          NULL, NULL, NULL, NULL, NULL, FALSE);
4364         if (ok != MAILIMAP_NO_ERROR) {
4365                 return ok;
4366         }
4367         numlist.next = NULL;
4368         numlist.data = GINT_TO_POINTER(uid);
4369
4370         ok = imap_set_message_flags
4371                 (session, IMAP_FOLDER_ITEM(item), &numlist, IMAP_FLAG_DELETED, NULL, TRUE);
4372         if (ok != MAILIMAP_NO_ERROR) {
4373                 log_warning(LOG_PROTOCOL, _("can't set deleted flags: %d\n"), uid);
4374                 return ok;
4375         }
4376
4377         if (!session->uidplus) {
4378                 ok = imap_cmd_expunge(session);
4379         } else {
4380                 gchar *uidstr;
4381
4382                 uidstr = g_strdup_printf("%u", uid);
4383                 ok = imap_cmd_expunge(session);
4384                 g_free(uidstr);
4385         }
4386         if (ok != MAILIMAP_NO_ERROR) {
4387                 log_warning(LOG_PROTOCOL, _("can't expunge\n"));
4388                 return ok;
4389         }
4390
4391         IMAP_FOLDER_ITEM(item)->uid_list = g_slist_remove(
4392             IMAP_FOLDER_ITEM(item)->uid_list, numlist.data);
4393         dir = folder_item_get_path(item);
4394         if (is_dir_exist(dir))
4395                 remove_numbered_files(dir, uid, uid);
4396         g_free(dir);
4397         return MAILIMAP_NO_ERROR;
4398 }
4399
4400 static gint compare_msginfo(gconstpointer a, gconstpointer b)
4401 {
4402         return ((MsgInfo *)a)->msgnum - ((MsgInfo *)b)->msgnum;
4403 }
4404
4405 static guint gslist_find_next_num(MsgNumberList **list, guint num)
4406 {
4407         GSList *elem;
4408
4409         g_return_val_if_fail(list != NULL, -1);
4410
4411         for (elem = *list; elem != NULL; elem = g_slist_next(elem))
4412                 if (GPOINTER_TO_INT(elem->data) >= num)
4413                         break;
4414         *list = elem;
4415         return elem != NULL ? GPOINTER_TO_INT(elem->data) : (gint)-1;
4416 }
4417
4418 static gboolean flag_ok(IMAPFolderItem *item, guint flag)
4419 {
4420         if (item->ok_flags && g_slist_find(item->ok_flags, GUINT_TO_POINTER(flag))) {
4421                 debug_print("flag %d is OK\n", flag);
4422                 return TRUE;
4423         }
4424         if (item->can_create_flags == ITEM_CAN_CREATE_FLAGS) {
4425                 debug_print("creating flags is OK\n");
4426                 return TRUE;
4427         }
4428         return FALSE;
4429 }
4430
4431 /*
4432  * NEW and DELETED flags are not syncronized
4433  * - The NEW/RECENT flags in IMAP folders can not really be directly
4434  *   modified by Sylpheed
4435  * - The DELETE/DELETED flag in IMAP and Sylpheed don't have the same
4436  *   meaning, in IMAP it always removes the messages from the FolderItem
4437  *   in Sylpheed it can mean to move the message to trash
4438  */
4439
4440 typedef struct _get_flags_data {
4441         Folder *folder;
4442         FolderItem *item;
4443         MsgInfoList *msginfo_list;
4444         GRelation *msgflags;
4445         gboolean full_search;
4446         gboolean done;
4447 } get_flags_data;
4448
4449 static /*gint*/ void *imap_get_flags_thread(void *data)
4450 {
4451         get_flags_data *stuff = (get_flags_data *)data;
4452         Folder *folder = stuff->folder;
4453         FolderItem *fitem = (FolderItem *) stuff->item;
4454         MsgInfoList *msginfo_list = stuff->msginfo_list;
4455         GRelation *msgflags = stuff->msgflags;
4456         GSList *elem;
4457         carray * lep_uidtab;
4458         IMAPSession *session;
4459         gint ok;
4460         int r = MAILIMAP_NO_ERROR;
4461         GHashTable *flags_hash = NULL;
4462         GHashTable *tags_hash = NULL;
4463         gboolean full_search = stuff->full_search;
4464         GSList *sorted_list = NULL;
4465         GSList *unseen = NULL, *answered = NULL, *flagged = NULL, *deleted = NULL, *forwarded = NULL, *spam = NULL;
4466         GSList *seq_list, *cur;
4467         gboolean reverse_seen = FALSE;
4468         gboolean selected_folder;
4469         gint exists_cnt, unseen_cnt;
4470         gboolean got_alien_tags = FALSE;
4471
4472         session = imap_session_get(folder);
4473
4474         if (session == NULL) {
4475                 stuff->done = TRUE;
4476                 return GINT_TO_POINTER(-1);
4477         }
4478         selected_folder = (session->mbox != NULL) &&
4479                           (!strcmp(session->mbox, fitem->path));
4480
4481         lock_session(session);
4482         if (!selected_folder) {
4483                 ok = imap_select(session, IMAP_FOLDER(folder), fitem,
4484                         &exists_cnt, NULL, &unseen_cnt, NULL, NULL, TRUE);
4485                 if (ok != MAILIMAP_NO_ERROR) {
4486                         stuff->done = TRUE;
4487                         return GINT_TO_POINTER(-1);
4488                 }
4489
4490                 if (unseen_cnt > exists_cnt / 2)
4491                         reverse_seen = TRUE;
4492         }
4493         else {
4494                 if (fitem->unread_msgs > fitem->total_msgs / 2)
4495                         reverse_seen = TRUE;
4496         }
4497
4498         sorted_list = g_slist_sort(g_slist_copy(msginfo_list), compare_msginfo);
4499         if (!full_search) {
4500                 seq_list = imap_get_lep_set_from_msglist(IMAP_FOLDER(folder), msginfo_list);
4501         } else {
4502                 struct mailimap_set * set;
4503                 set = mailimap_set_new_interval(1, 0);
4504                 seq_list = g_slist_append(NULL, set);
4505         }
4506
4507         if (folder->account && folder->account->low_bandwidth) {
4508                 for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
4509                         struct mailimap_set * imapset;
4510                         clist * lep_uidlist;
4511                         int r;
4512
4513                         imapset = cur->data;
4514                         if (reverse_seen) {
4515                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SEEN,
4516                                                          full_search ? NULL:imapset, &lep_uidlist);
4517                         }
4518                         else {
4519                                 r = imap_threaded_search(folder,
4520                                                          IMAP_SEARCH_TYPE_UNSEEN,
4521                                                          full_search ? NULL:imapset, &lep_uidlist);
4522                         }
4523                         if (r == MAILIMAP_NO_ERROR) {
4524                                 GSList * uidlist;
4525
4526                                 uidlist = imap_uid_list_from_lep(lep_uidlist);
4527                                 mailimap_search_result_free(lep_uidlist);
4528
4529                                 unseen = g_slist_concat(unseen, uidlist);
4530                         } else {
4531                                 imap_handle_error(SESSION(session), r);
4532                                 goto bail;
4533                         }
4534
4535                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_FLAGGED,
4536                                                  full_search ? NULL:imapset, &lep_uidlist);
4537                         if (r == MAILIMAP_NO_ERROR) {
4538                                 GSList * uidlist;
4539
4540                                 uidlist = imap_uid_list_from_lep(lep_uidlist);
4541                                 mailimap_search_result_free(lep_uidlist);
4542
4543                                 flagged = g_slist_concat(flagged, uidlist);
4544                         } else {
4545                                 imap_handle_error(SESSION(session), r);
4546                                 goto bail;
4547                         }
4548
4549                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
4550                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_ANSWERED,
4551                                                          full_search ? NULL:imapset, &lep_uidlist);
4552                                 if (r == MAILIMAP_NO_ERROR) {
4553                                         GSList * uidlist;
4554
4555                                         uidlist = imap_uid_list_from_lep(lep_uidlist);
4556                                         mailimap_search_result_free(lep_uidlist);
4557
4558                                         answered = g_slist_concat(answered, uidlist);
4559                                 } else {
4560                                         imap_handle_error(SESSION(session), r);
4561                                         goto bail;
4562                                 }
4563
4564                                 if (flag_ok(IMAP_FOLDER_ITEM(fitem), IMAP_FLAG_FORWARDED)) {
4565                                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_FORWARDED,
4566                                                                  full_search ? NULL:imapset, &lep_uidlist);
4567                                         if (r == MAILIMAP_NO_ERROR) {
4568                                                 GSList * uidlist;
4569
4570                                                 uidlist = imap_uid_list_from_lep(lep_uidlist);
4571                                                 mailimap_search_result_free(lep_uidlist);
4572
4573                                                 forwarded = g_slist_concat(forwarded, uidlist);
4574                                         } else {
4575                                                 imap_handle_error(SESSION(session), r);
4576                                                 goto bail;
4577                                         }
4578                                 }
4579
4580                                 if (flag_ok(IMAP_FOLDER_ITEM(fitem), IMAP_FLAG_SPAM)) {
4581                                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SPAM,
4582                                                                  full_search ? NULL:imapset, &lep_uidlist);
4583                                         if (r == MAILIMAP_NO_ERROR) {
4584                                                 GSList * uidlist;
4585
4586                                                 uidlist = imap_uid_list_from_lep(lep_uidlist);
4587                                                 mailimap_search_result_free(lep_uidlist);
4588
4589                                                 spam = g_slist_concat(spam, uidlist);
4590                                         } else {
4591                                                 imap_handle_error(SESSION(session), r);
4592                                                 goto bail;
4593                                         }
4594                                 }
4595
4596                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_DELETED,
4597                                                          full_search ? NULL:imapset, &lep_uidlist);
4598                                 if (r == MAILIMAP_NO_ERROR) {
4599                                         GSList * uidlist;
4600
4601                                         uidlist = imap_uid_list_from_lep(lep_uidlist);
4602                                         mailimap_search_result_free(lep_uidlist);
4603
4604                                         deleted = g_slist_concat(deleted, uidlist);
4605                                 } else {
4606                                         imap_handle_error(SESSION(session), r);
4607                                         goto bail;
4608                                 }
4609                         }
4610                 }
4611
4612         } else {
4613                 r = imap_threaded_fetch_uid_flags(folder, 1, &lep_uidtab);
4614                 if (r == MAILIMAP_NO_ERROR) {
4615                         flags_hash = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, NULL);
4616                         tags_hash = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, NULL);
4617                         imap_flags_hash_from_lep_uid_flags_tab(lep_uidtab, flags_hash, tags_hash);
4618                         imap_fetch_uid_flags_list_free(lep_uidtab);
4619                 } else {
4620                         imap_handle_error(SESSION(session), r);
4621                         goto bail;
4622                 }
4623         }
4624
4625 bail:
4626         if (r == MAILIMAP_NO_ERROR)
4627                 unlock_session(session);
4628
4629         for (elem = sorted_list; elem != NULL; elem = g_slist_next(elem)) {
4630                 MsgInfo *msginfo;
4631                 MsgPermFlags flags, oldflags;
4632                 gboolean wasnew;
4633
4634                 msginfo = (MsgInfo *) elem->data;
4635                 flags = msginfo->flags.perm_flags;
4636                 wasnew = (flags & MSG_NEW);
4637                 oldflags = flags & ~(MSG_NEW|MSG_UNREAD|MSG_REPLIED|MSG_FORWARDED|MSG_MARKED|MSG_DELETED|MSG_SPAM);
4638
4639                 if (folder->account && folder->account->low_bandwidth) {
4640                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
4641                                 flags &= ~((reverse_seen ? 0 : MSG_UNREAD | MSG_NEW) | MSG_REPLIED | MSG_FORWARDED | MSG_MARKED | MSG_SPAM);
4642                         } else {
4643                                 flags &= ~((reverse_seen ? 0 : MSG_UNREAD | MSG_NEW | MSG_MARKED));
4644                         }
4645                         if (reverse_seen)
4646                                 flags |= MSG_UNREAD | (wasnew ? MSG_NEW : 0);
4647                         if (gslist_find_next_num(&unseen, msginfo->msgnum) == msginfo->msgnum) {
4648                                 if (!reverse_seen) {
4649                                         flags |= MSG_UNREAD | (wasnew ? MSG_NEW : 0);
4650                                 } else {
4651                                         flags &= ~(MSG_UNREAD | MSG_NEW);
4652                                 }
4653                         }
4654
4655                         if (gslist_find_next_num(&flagged, msginfo->msgnum) == msginfo->msgnum)
4656                                 flags |= MSG_MARKED;
4657                         else
4658                                 flags &= ~MSG_MARKED;
4659
4660                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
4661                                 if (gslist_find_next_num(&answered, msginfo->msgnum) == msginfo->msgnum)
4662                                         flags |= MSG_REPLIED;
4663                                 else
4664                                         flags &= ~MSG_REPLIED;
4665                                 if (gslist_find_next_num(&forwarded, msginfo->msgnum) == msginfo->msgnum)
4666                                         flags |= MSG_FORWARDED;
4667                                 else
4668                                         flags &= ~MSG_FORWARDED;
4669                                 if (gslist_find_next_num(&spam, msginfo->msgnum) == msginfo->msgnum)
4670                                         flags |= MSG_SPAM;
4671                                 else
4672                                         flags &= ~MSG_SPAM;
4673                                 if (gslist_find_next_num(&deleted, msginfo->msgnum) == msginfo->msgnum)
4674                                         flags |= MSG_DELETED;
4675                                 else
4676                                         flags &= ~MSG_DELETED;
4677                         }
4678                 } else {
4679                         if (flags_hash != NULL) {
4680
4681                                 flags = GPOINTER_TO_INT(g_hash_table_lookup(flags_hash,
4682                                                 GINT_TO_POINTER(msginfo->msgnum)));
4683                         }
4684
4685                         if ((flags & MSG_UNREAD) == 0)
4686                                 flags &= ~MSG_NEW;
4687                         else if (wasnew)
4688                                 flags |= MSG_NEW;
4689                         flags |= oldflags;
4690
4691                         if (tags_hash != NULL) {
4692                                 GSList *tags = g_hash_table_lookup(tags_hash, GINT_TO_POINTER(msginfo->msgnum));
4693                                 GSList *cur;
4694
4695                                 if (tags != NULL) {
4696                                         g_slist_free(msginfo->tags);
4697                                         msginfo->tags = NULL;
4698                                 }
4699                                 for (cur = tags; cur; cur = cur->next) {
4700                                         gchar *real_tag = imap_modified_utf7_to_utf8(cur->data, TRUE);
4701                                         gint id = 0;
4702                                         id = tags_get_id_for_str(real_tag);
4703                                         if (id == -1) {
4704                                                 id = tags_add_tag(real_tag);
4705                                                 got_alien_tags = TRUE;
4706                                         }
4707                                         if (!g_slist_find(msginfo->tags, GINT_TO_POINTER(id))) {
4708                                                 msginfo->tags = g_slist_append(
4709                                                                 msginfo->tags,
4710                                                                 GINT_TO_POINTER(id));
4711                                         }
4712                                         g_free(real_tag);
4713                                 }
4714                                 slist_free_strings(tags);
4715                                 g_slist_free(tags);
4716                         }
4717                 }
4718
4719                 g_relation_insert(msgflags, msginfo, GINT_TO_POINTER(flags));
4720         }
4721
4722         if (got_alien_tags) {
4723                 tags_write_tags();
4724                 main_window_reflect_tags_changes(mainwindow_get_mainwindow());
4725         }
4726
4727         if (flags_hash)
4728                 g_hash_table_destroy(flags_hash);
4729         if (tags_hash)
4730                 g_hash_table_destroy(tags_hash);
4731
4732         imap_lep_set_free(seq_list);
4733         g_slist_free(flagged);
4734         g_slist_free(deleted);
4735         g_slist_free(answered);
4736         g_slist_free(forwarded);
4737         g_slist_free(spam);
4738         g_slist_free(unseen);
4739         g_slist_free(sorted_list);
4740
4741         stuff->done = TRUE;
4742         return GINT_TO_POINTER(0);
4743 }
4744
4745 static gint imap_get_flags(Folder *folder, FolderItem *item,
4746                            MsgInfoList *msginfo_list, GRelation *msgflags)
4747 {
4748         gint result;
4749         get_flags_data *data = g_new0(get_flags_data, 1);
4750         data->done = FALSE;
4751         data->folder = folder;
4752         data->item = item;
4753         data->msginfo_list = msginfo_list;
4754         data->msgflags = msgflags;
4755         data->full_search = FALSE;
4756
4757         GSList *tmp = NULL, *cur;
4758
4759         if (prefs_common.work_offline &&
4760             !inc_offline_should_override(FALSE,
4761                 _("Claws Mail needs network access in order "
4762                   "to access the IMAP server."))) {
4763                 g_free(data);
4764                 return -1;
4765         }
4766
4767         tmp = folder_item_get_msg_list(item);
4768
4769         if (g_slist_length(tmp) <= g_slist_length(msginfo_list))
4770                 data->full_search = TRUE;
4771
4772         for (cur = tmp; cur; cur = cur->next)
4773                 procmsg_msginfo_free((MsgInfo *)cur->data);
4774
4775         g_slist_free(tmp);
4776
4777         result = GPOINTER_TO_INT(imap_get_flags_thread(data));
4778
4779         g_free(data);
4780         return result;
4781
4782 }
4783
4784 static gboolean process_flags(gpointer key, gpointer value, gpointer user_data)
4785 {
4786         gboolean flags_set = GPOINTER_TO_INT(user_data);
4787         gint flags_value = GPOINTER_TO_INT(key);
4788         hashtable_data *data = (hashtable_data *)value;
4789         IMAPFolderItem *_item = data->item;
4790         FolderItem *item = (FolderItem *)_item;
4791         gint ok = MAILIMAP_ERROR_BAD_STATE;
4792         IMAPSession *session = NULL;
4793
4794         debug_print("getting session...\n");
4795         session = imap_session_get(item->folder);
4796
4797         data->msglist = g_slist_reverse(data->msglist);
4798
4799         debug_print("IMAP %ssetting flags to %d for %d messages\n",
4800                 flags_set?"":"un",
4801                 flags_value,
4802                 g_slist_length(data->msglist));
4803
4804         lock_session(session);
4805         if (session) {
4806                 ok = imap_select(session, IMAP_FOLDER(item->folder), item,
4807                          NULL, NULL, NULL, NULL, NULL, FALSE);
4808         }
4809         if (ok == MAILIMAP_NO_ERROR) {
4810                 ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item),
4811                         data->msglist, flags_value, NULL, flags_set);
4812         } else {
4813                 g_warning("can't select mailbox %s\n", item->path);
4814         }
4815
4816         if (!is_fatal(ok))
4817                 unlock_session(session);
4818
4819         g_slist_free(data->msglist);
4820         g_free(data);
4821         return TRUE;
4822 }
4823
4824 static gboolean process_tags(gpointer key, gpointer value, gpointer user_data)
4825 {
4826         gboolean tags_set = GPOINTER_TO_INT(user_data);
4827         TagsData *data = (TagsData *)value;
4828         IMAPFolderItem *_item = data->item;
4829         FolderItem *item = (FolderItem *)_item;
4830         gchar *str = data->str;
4831         gint ok = MAILIMAP_ERROR_BAD_STATE;
4832         IMAPSession *session = NULL;
4833
4834         debug_print("getting session...\n");
4835         session = imap_session_get(item->folder);
4836
4837         data->msglist = g_slist_reverse(data->msglist);
4838
4839         debug_print("IMAP %ssetting tags %s for %d messages\n",
4840                 tags_set?"":"un",
4841                 str,
4842                 g_slist_length(data->msglist));
4843
4844         lock_session(session);
4845         if (session) {
4846                 ok = imap_select(session, IMAP_FOLDER(item->folder), item,
4847                          NULL, NULL, NULL, NULL, NULL, FALSE);
4848         }
4849         if (ok == MAILIMAP_NO_ERROR) {
4850                 GSList list;
4851                 list.data = str;
4852                 list.next = NULL;
4853                 ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item),
4854                         data->msglist, 0, &list, tags_set);
4855         } else {
4856                 g_warning("can't select mailbox %s\n", item->path);
4857         }
4858
4859         if (!is_fatal(ok))
4860                 unlock_session(session);
4861
4862         g_slist_free(data->msglist);
4863         g_free(data->str);
4864         g_free(data);
4865         return TRUE;
4866 }
4867
4868 static void process_hashtable(IMAPFolderItem *item)
4869 {
4870         if (item->flags_set_table) {
4871                 g_hash_table_foreach_remove(item->flags_set_table, process_flags, GINT_TO_POINTER(TRUE));
4872                 g_hash_table_destroy(item->flags_set_table);
4873                 item->flags_set_table = NULL;
4874         }
4875         if (item->flags_unset_table) {
4876                 g_hash_table_foreach_remove(item->flags_unset_table, process_flags, GINT_TO_POINTER(FALSE));
4877                 g_hash_table_destroy(item->flags_unset_table);
4878                 item->flags_unset_table = NULL;
4879         }
4880         if (item->tags_set_table) {
4881                 g_hash_table_foreach_remove(item->tags_set_table, process_tags, GINT_TO_POINTER(TRUE));
4882                 g_hash_table_destroy(item->tags_set_table);
4883                 item->tags_set_table = NULL;
4884         }
4885         if (item->tags_unset_table) {
4886                 g_hash_table_foreach_remove(item->tags_unset_table, process_tags, GINT_TO_POINTER(FALSE));
4887                 g_hash_table_destroy(item->tags_unset_table);
4888                 item->tags_unset_table = NULL;
4889         }
4890
4891 }
4892
4893 static void imap_set_batch (Folder *folder, FolderItem *_item, gboolean batch)
4894 {
4895         IMAPFolderItem *item = (IMAPFolderItem *)_item;
4896         IMAPSession *session;
4897
4898         g_return_if_fail(item != NULL);
4899
4900         if (item->batching == batch)
4901                 return;
4902
4903         if (batch) {
4904                 item->batching = TRUE;
4905                 debug_print("IMAP switching to batch mode\n");
4906                 if (!item->flags_set_table) {
4907                         item->flags_set_table = g_hash_table_new(NULL, g_direct_equal);
4908                 }
4909                 if (!item->flags_unset_table) {
4910                         item->flags_unset_table = g_hash_table_new(NULL, g_direct_equal);
4911                 }
4912                 if (!item->tags_set_table) {
4913                         item->tags_set_table = g_hash_table_new(NULL, g_direct_equal);
4914                 }
4915                 if (!item->tags_unset_table) {
4916                         item->tags_unset_table = g_hash_table_new(NULL, g_direct_equal);
4917                 }
4918                 session = imap_session_get(folder);
4919                 if (session) {
4920                         imap_refresh_sensitivity(session);
4921                         session->sens_update_block = TRUE;
4922                 }
4923         } else {
4924                 debug_print("IMAP switching away from batch mode\n");
4925                 /* process stuff */
4926                 process_hashtable(item);
4927                 item->batching = FALSE;
4928                 session = imap_session_get(folder);
4929                 if (session) {
4930                         session->sens_update_block = FALSE;
4931                         imap_refresh_sensitivity(session);
4932                 }
4933         }
4934 }
4935
4936
4937
4938 /* data types conversion libetpan <-> claws */
4939
4940
4941
4942 #define ETPAN_IMAP_MB_MARKED      1
4943 #define ETPAN_IMAP_MB_UNMARKED    2
4944 #define ETPAN_IMAP_MB_NOSELECT    4
4945 #define ETPAN_IMAP_MB_NOINFERIORS 8
4946
4947 static int imap_flags_to_flags(struct mailimap_mbx_list_flags * imap_flags)
4948 {
4949   int flags;
4950   clistiter * cur;
4951
4952   flags = 0;
4953   if (imap_flags->mbf_type == MAILIMAP_MBX_LIST_FLAGS_SFLAG) {
4954     switch (imap_flags->mbf_sflag) {
4955     case MAILIMAP_MBX_LIST_SFLAG_MARKED:
4956       flags |= ETPAN_IMAP_MB_MARKED;
4957       break;
4958     case MAILIMAP_MBX_LIST_SFLAG_NOSELECT:
4959       flags |= ETPAN_IMAP_MB_NOSELECT;
4960       break;
4961     case MAILIMAP_MBX_LIST_SFLAG_UNMARKED:
4962       flags |= ETPAN_IMAP_MB_UNMARKED;
4963       break;
4964     }
4965   }
4966
4967   for(cur = clist_begin(imap_flags->mbf_oflags) ; cur != NULL ;
4968       cur = clist_next(cur)) {
4969     struct mailimap_mbx_list_oflag * oflag;
4970
4971     oflag = clist_content(cur);
4972
4973     switch (oflag->of_type) {
4974     case MAILIMAP_MBX_LIST_OFLAG_NOINFERIORS:
4975       flags |= ETPAN_IMAP_MB_NOINFERIORS;
4976       break;
4977     }
4978   }
4979
4980   return flags;
4981 }
4982
4983 static GSList * imap_list_from_lep(IMAPFolder * folder,
4984                                    clist * list, const gchar * real_path, gboolean all)
4985 {
4986         clistiter * iter;
4987         GSList * item_list = NULL, *llast = NULL;
4988
4989         for(iter = clist_begin(list) ; iter != NULL ;
4990             iter = clist_next(iter)) {
4991                 struct mailimap_mailbox_list * mb;
4992                 int flags;
4993                 char delimiter;
4994                 char * name;
4995                 char * dup_name;
4996                 gchar * base;
4997                 gchar * loc_name;
4998                 gchar * loc_path;
4999                 FolderItem *new_item;
5000
5001                 mb = clist_content(iter);
5002
5003                 if (mb == NULL)
5004                         continue;
5005
5006                 flags = 0;
5007                 if (mb->mb_flag != NULL)
5008                         flags = imap_flags_to_flags(mb->mb_flag);
5009
5010                 delimiter = mb->mb_delimiter;
5011                 name = mb->mb_name;
5012
5013                 dup_name = strdup(name);
5014                 if (delimiter != '\0')
5015                         subst_char(dup_name, delimiter, '/');
5016
5017                 base = g_path_get_basename(dup_name);
5018                 if (base[0] == '.') {
5019                         g_free(base);
5020                         free(dup_name);
5021                         continue;
5022                 }
5023                 if (!all && path_cmp(name, real_path) == 0) {
5024                         g_free(base);
5025                         free(dup_name);
5026                         continue;
5027                 }
5028
5029                 if (!all && dup_name[strlen(dup_name)-1] == '/') {
5030                         dup_name[strlen(dup_name)-1] = '\0';
5031                 }
5032
5033                 loc_name = imap_modified_utf7_to_utf8(base, FALSE);
5034                 loc_path = imap_modified_utf7_to_utf8(dup_name, FALSE);
5035
5036                 new_item = folder_item_new(FOLDER(folder), loc_name, loc_path);
5037                 if ((flags & ETPAN_IMAP_MB_NOINFERIORS) != 0)
5038                         new_item->no_sub = TRUE;
5039                 if (strcmp(dup_name, "INBOX") != 0 &&
5040                     ((flags & ETPAN_IMAP_MB_NOSELECT) != 0))
5041                         new_item->no_select = TRUE;
5042
5043                 if (item_list == NULL)
5044                         llast = item_list = g_slist_append(item_list, new_item);
5045                 else {
5046                         llast = g_slist_append(llast, new_item);
5047                         llast = llast->next;
5048                 }
5049                 debug_print("folder '%s' found.\n", loc_path);
5050                 g_free(base);
5051                 g_free(loc_path);
5052                 g_free(loc_name);
5053
5054                 free(dup_name);
5055         }
5056
5057         return item_list;
5058 }
5059
5060 static GSList * imap_get_lep_set_from_numlist(IMAPFolder *folder, MsgNumberList *numlist)
5061 {
5062         GSList *sorted_list, *cur;
5063         guint first, last, next;
5064         GSList *ret_list = NULL, *llast = NULL;
5065         struct mailimap_set * current_set;
5066         unsigned int item_count;
5067
5068         if (numlist == NULL)
5069                 return NULL;
5070
5071         current_set = mailimap_set_new_empty();
5072
5073         sorted_list = g_slist_copy(numlist);
5074         sorted_list = g_slist_sort(sorted_list, g_int_compare);
5075
5076         first = GPOINTER_TO_INT(sorted_list->data);
5077
5078         item_count = 0;
5079         for (cur = sorted_list; cur != NULL; cur = g_slist_next(cur)) {
5080                 if (GPOINTER_TO_INT(cur->data) == 0)
5081                         continue;
5082
5083                 item_count ++;
5084
5085                 last = GPOINTER_TO_INT(cur->data);
5086                 if (cur->next)
5087                         next = GPOINTER_TO_INT(cur->next->data);
5088                 else
5089                         next = 0;
5090
5091                 if (last + 1 != next || next == 0 || item_count >= folder->max_set_size) {
5092
5093                         struct mailimap_set_item * item;
5094                         item = mailimap_set_item_new(first, last);
5095                         mailimap_set_add(current_set, item);
5096
5097                         first = next;
5098
5099                         if (item_count >= folder->max_set_size) {
5100                                 if (ret_list == NULL)
5101                                         llast = ret_list = g_slist_append(ret_list,
5102                                                           current_set);
5103                                 else {
5104                                         llast = g_slist_append(llast, current_set);
5105                                         llast = llast->next;
5106                                 }
5107
5108                                 current_set = mailimap_set_new_empty();
5109                                 item_count = 0;
5110                         }
5111                 }
5112         }
5113
5114         if (clist_count(current_set->set_list) > 0) {
5115                 ret_list = g_slist_append(ret_list,
5116                                           current_set);
5117         }
5118
5119         g_slist_free(sorted_list);
5120
5121         return ret_list;
5122 }
5123
5124 static GSList * imap_get_lep_set_from_msglist(IMAPFolder *folder, MsgInfoList *msglist)
5125 {
5126         MsgNumberList *numlist = NULL;
5127         MsgInfoList *cur;
5128         GSList *seq_list;
5129
5130         for (cur = msglist; cur != NULL; cur = g_slist_next(cur)) {
5131                 MsgInfo *msginfo = (MsgInfo *) cur->data;
5132
5133                 numlist = g_slist_prepend(numlist, GINT_TO_POINTER(msginfo->msgnum));
5134         }
5135         numlist = g_slist_reverse(numlist);
5136         seq_list = imap_get_lep_set_from_numlist(folder, numlist);
5137         g_slist_free(numlist);
5138
5139         return seq_list;
5140 }
5141
5142 static GSList * imap_uid_list_from_lep(clist * list)
5143 {
5144         clistiter * iter;
5145         GSList * result;
5146
5147         result = NULL;
5148
5149         for(iter = clist_begin(list) ; iter != NULL ;
5150             iter = clist_next(iter)) {
5151                 uint32_t * puid;
5152
5153                 puid = clist_content(iter);
5154                 result = g_slist_prepend(result, GINT_TO_POINTER(* puid));
5155         }
5156
5157         result = g_slist_reverse(result);
5158         return result;
5159 }
5160
5161 static GSList * imap_uid_list_from_lep_tab(carray * list)
5162 {
5163         unsigned int i;
5164         GSList * result;
5165
5166         result = NULL;
5167
5168         for(i = 0 ; i < carray_count(list) ; i ++) {
5169                 uint32_t * puid;
5170
5171                 puid = carray_get(list, i);
5172                 result = g_slist_prepend(result, GINT_TO_POINTER(* puid));
5173         }
5174         result = g_slist_reverse(result);
5175         return result;
5176 }
5177
5178 static void imap_flags_hash_from_lep_uid_flags_tab(carray * list,
5179                                                    GHashTable * hash,
5180                                                    GHashTable * tags_hash)
5181 {
5182         unsigned int i;
5183         GSList * result;
5184
5185         result = NULL;
5186
5187         for(i = 0 ; i < carray_count(list) ; i += 3) {
5188                 uint32_t * puid;
5189                 int * pflags;
5190                 GSList *tags;
5191
5192                 puid = carray_get(list, i);
5193                 pflags = carray_get(list, i + 1);
5194                 tags = carray_get(list, i + 2);
5195
5196                 g_hash_table_insert(hash, GINT_TO_POINTER(*puid), GINT_TO_POINTER(* pflags));
5197                 g_hash_table_insert(tags_hash, GINT_TO_POINTER(*puid), tags);
5198         }
5199 }
5200
5201 static MsgInfo *imap_envelope_from_lep(struct imap_fetch_env_info * info,
5202                                        FolderItem *item)
5203 {
5204         MsgInfo *msginfo = NULL;
5205         guint32 uid = 0;
5206         goffset size = 0;
5207         MsgFlags flags = {0, 0};
5208
5209         if (info->headers == NULL)
5210                 return NULL;
5211
5212         MSG_SET_TMP_FLAGS(flags, MSG_IMAP);
5213         if (folder_has_parent_of_type(item, F_QUEUE)) {
5214                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
5215         } else if (folder_has_parent_of_type(item, F_DRAFT)) {
5216                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
5217         }
5218         flags.perm_flags = info->flags;
5219
5220         uid = info->uid;
5221         size = (goffset) info->size;
5222         msginfo = procheader_parse_str(info->headers, flags, FALSE, FALSE);
5223
5224         if (msginfo) {
5225                 msginfo->msgnum = uid;
5226                 msginfo->size = size;
5227         }
5228
5229         return msginfo;
5230 }
5231
5232 static void imap_lep_set_free(GSList *seq_list)
5233 {
5234         GSList * cur;
5235
5236         for(cur = seq_list ; cur != NULL ; cur = g_slist_next(cur)) {
5237                 struct mailimap_set * imapset;
5238
5239                 imapset = cur->data;
5240                 mailimap_set_free(imapset);
5241         }
5242         g_slist_free(seq_list);
5243 }
5244
5245 static struct mailimap_flag_list * imap_flag_to_lep(IMAPFolderItem *item, IMAPFlags flags, GSList *tags)
5246 {
5247         struct mailimap_flag_list * flag_list;
5248         GSList *cur = tags;
5249
5250         flag_list = mailimap_flag_list_new_empty();
5251
5252         if (IMAP_IS_SEEN(flags))
5253                 mailimap_flag_list_add(flag_list,
5254                                        mailimap_flag_new_seen());
5255         if (IMAP_IS_ANSWERED(flags))
5256                 mailimap_flag_list_add(flag_list,
5257                                        mailimap_flag_new_answered());
5258         if (IMAP_IS_FLAGGED(flags))
5259                 mailimap_flag_list_add(flag_list,
5260                                        mailimap_flag_new_flagged());
5261         if (IMAP_IS_DELETED(flags))
5262                 mailimap_flag_list_add(flag_list,
5263                                        mailimap_flag_new_deleted());
5264         if (IMAP_IS_DRAFT(flags))
5265                 mailimap_flag_list_add(flag_list,
5266                                        mailimap_flag_new_draft());
5267         if (IMAP_IS_FORWARDED(flags) && flag_ok(item, IMAP_FLAG_FORWARDED))
5268                 mailimap_flag_list_add(flag_list,
5269                                        mailimap_flag_new_flag_keyword(strdup("$Forwarded")));
5270         if (IMAP_IS_SPAM(flags) && flag_ok(item, IMAP_FLAG_SPAM))
5271                 mailimap_flag_list_add(flag_list,
5272                                        mailimap_flag_new_flag_keyword(strdup("Junk")));
5273         else if (IMAP_IS_HAM(flags) && flag_ok(item, IMAP_FLAG_HAM))
5274                 mailimap_flag_list_add(flag_list,
5275                                        mailimap_flag_new_flag_keyword(strdup("NonJunk")));
5276
5277         for (; cur; cur = cur->next) {
5278                 gchar *enc_str =
5279                         imap_utf8_to_modified_utf7(cur->data, TRUE);
5280                 g_strstrip(enc_str);
5281
5282                 mailimap_flag_list_add(flag_list,
5283                         mailimap_flag_new_flag_keyword(enc_str));
5284         }
5285
5286         return flag_list;
5287 }
5288
5289 guint imap_folder_get_refcnt(Folder *folder)
5290 {
5291         return ((IMAPFolder *)folder)->refcnt;
5292 }
5293
5294 void imap_folder_ref(Folder *folder)
5295 {
5296         ((IMAPFolder *)folder)->refcnt++;
5297 }
5298
5299 void imap_disconnect_all(void)
5300 {
5301         GList *list;
5302         gboolean short_timeout;
5303 #ifdef HAVE_NETWORKMANAGER_SUPPORT
5304         GError *error;
5305 #endif
5306
5307 #ifdef HAVE_NETWORKMANAGER_SUPPORT
5308         error = NULL;
5309         short_timeout = !networkmanager_is_online(&error);
5310         if(error) {
5311                 short_timeout = TRUE;
5312                 g_error_free(error);
5313         }
5314 #else
5315         short_timeout = TRUE;
5316 #endif
5317
5318         if(short_timeout)
5319                 imap_main_set_timeout(1);
5320
5321         for (list = account_get_list(); list != NULL; list = list->next) {
5322                 PrefsAccount *account = list->data;
5323                 if (account->protocol == A_IMAP4) {
5324                         RemoteFolder *folder = (RemoteFolder *)account->folder;
5325                         if (folder && folder->session) {
5326                                 IMAPSession *session = (IMAPSession *)folder->session;
5327                                 imap_threaded_disconnect(FOLDER(folder));
5328                                 SESSION(session)->state = SESSION_DISCONNECTED;
5329                                 SESSION(session)->sock = NULL;
5330                                 session_destroy(SESSION(session));
5331                                 folder->session = NULL;
5332                         }
5333                 }
5334         }
5335
5336         if(short_timeout)
5337                 imap_main_set_timeout(prefs_common.io_timeout_secs);
5338 }
5339
5340 void imap_folder_unref(Folder *folder)
5341 {
5342         if (((IMAPFolder *)folder)->refcnt > 0)
5343                 ((IMAPFolder *)folder)->refcnt--;
5344 }
5345
5346 void imap_cancel_all(void)
5347 {
5348         GList *folderlist;
5349         GList *cur;
5350
5351         folderlist = folder_get_list();
5352         for (cur = folderlist; cur != NULL; cur = g_list_next(cur)) {
5353                 Folder *folder = (Folder *) cur->data;
5354
5355                 if (folder->klass == &imap_class) {
5356                         if (imap_is_busy(folder)) {
5357                                 IMAPSession *imap_session;
5358                                 RemoteFolder *rfolder;
5359
5360                                 g_printerr("cancelled\n");
5361                                 imap_threaded_cancel(folder);
5362                                 rfolder = (RemoteFolder *) folder;
5363                                 imap_session = (IMAPSession *) rfolder->session;
5364                                 if (imap_session)
5365                                         imap_session->cancelled = 1;
5366                         }
5367                 }
5368         }
5369 }
5370
5371 gboolean imap_cancel_all_enabled(void)
5372 {
5373         GList *folderlist;
5374         GList *cur;
5375
5376         folderlist = folder_get_list();
5377         for (cur = folderlist; cur != NULL; cur = g_list_next(cur)) {
5378                 Folder *folder = (Folder *) cur->data;
5379
5380                 if (folder->klass == &imap_class) {
5381                         if (imap_is_busy(folder)) {
5382                                 return TRUE;
5383                         }
5384                 }
5385         }
5386
5387         return FALSE;
5388 }
5389
5390 static gboolean imap_is_busy(Folder *folder)
5391 {
5392         IMAPSession *imap_session;
5393         RemoteFolder *rfolder;
5394
5395         rfolder = (RemoteFolder *) folder;
5396         imap_session = (IMAPSession *) rfolder->session;
5397         if (imap_session == NULL)
5398                 return FALSE;
5399
5400         return imap_session->busy;
5401 }
5402
5403 #else /* HAVE_LIBETPAN */
5404
5405 static FolderClass imap_class;
5406
5407 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item);
5408 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag);
5409
5410 static Folder   *imap_folder_new        (const gchar    *name,
5411                                          const gchar    *path)
5412 {
5413         static gboolean missing_imap_warning = TRUE;
5414         if (missing_imap_warning) {
5415                 missing_imap_warning = FALSE;
5416                 alertpanel_error(
5417                         _("You have one or more IMAP accounts "
5418                           "defined. However this version of "
5419                           "Claws Mail has been built without "
5420                           "IMAP support; your IMAP account(s) are "
5421                           "disabled.\n\n"
5422                           "You probably need to "
5423                           "install libetpan and recompile "
5424                           "Claws Mail."));
5425         }
5426         return NULL;
5427 }
5428 static gint     imap_create_tree        (Folder         *folder)
5429 {
5430         return -1;
5431 }
5432 static FolderItem *imap_create_folder   (Folder         *folder,
5433                                          FolderItem     *parent,
5434                                          const gchar    *name)
5435 {
5436         return NULL;
5437 }
5438 static gint     imap_rename_folder      (Folder         *folder,
5439                                          FolderItem     *item,
5440                                          const gchar    *name)
5441 {
5442         return -1;
5443 }
5444
5445 gchar imap_get_path_separator_for_item(FolderItem *item)
5446 {
5447         return '/';
5448 }
5449
5450 FolderClass *imap_get_class(void)
5451 {
5452         if (imap_class.idstr == NULL) {
5453                 imap_class.type = F_IMAP;
5454                 imap_class.idstr = "imap";
5455                 imap_class.uistr = "IMAP4";
5456
5457                 imap_class.new_folder = imap_folder_new;
5458                 imap_class.create_tree = imap_create_tree;
5459                 imap_class.create_folder = imap_create_folder;
5460                 imap_class.rename_folder = imap_rename_folder;
5461
5462                 imap_class.set_xml = folder_set_xml;
5463                 imap_class.get_xml = folder_get_xml;
5464                 imap_class.item_set_xml = imap_item_set_xml;
5465                 imap_class.item_get_xml = imap_item_get_xml;
5466                 /* nothing implemented */
5467         }
5468
5469         return &imap_class;
5470 }
5471
5472 void imap_disconnect_all(void)
5473 {
5474 }
5475
5476 gint imap_subscribe(Folder *folder, FolderItem *item, gchar *rpath, gboolean sub)
5477 {
5478         return -1;
5479 }
5480
5481 GList * imap_scan_subtree(Folder *folder, FolderItem *item, gboolean unsubs_only, gboolean recursive)
5482 {
5483         return NULL;
5484 }
5485
5486 void imap_cache_msg(FolderItem *item, gint msgnum)
5487 {
5488 }
5489
5490 void imap_cancel_all(void)
5491 {
5492 }
5493
5494 gboolean imap_cancel_all_enabled(void)
5495 {
5496         return FALSE;
5497 }
5498
5499 #endif
5500
5501 #ifdef HAVE_LIBETPAN
5502 static void imap_synchronise(FolderItem *item, gint days)
5503 {
5504         if (IMAP_FOLDER_ITEM(item)->last_sync == IMAP_FOLDER_ITEM(item)->last_change) {
5505                 debug_print("%s already synced\n", item->path?item->path:item->name);
5506                 return;
5507         }
5508         debug_print("syncing %s\n", item->path?item->path:item->name);
5509         imap_gtk_synchronise(item, days);
5510         IMAP_FOLDER_ITEM(item)->last_sync = IMAP_FOLDER_ITEM(item)->last_change;
5511 }
5512 #endif
5513
5514 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag)
5515 {
5516 #ifdef HAVE_LIBETPAN
5517         GList *cur;
5518 #endif
5519         folder_item_set_xml(folder, item, tag);
5520
5521 #ifdef HAVE_LIBETPAN
5522         for (cur = tag->attr; cur != NULL; cur = g_list_next(cur)) {
5523                 XMLAttr *attr = (XMLAttr *) cur->data;
5524
5525                 if (!attr || !attr->name || !attr->value) continue;
5526                 if (!strcmp(attr->name, "uidnext"))
5527                         IMAP_FOLDER_ITEM(item)->uid_next = atoi(attr->value);
5528                 if (!strcmp(attr->name, "last_sync"))
5529                         IMAP_FOLDER_ITEM(item)->last_sync = atoi(attr->value);
5530                 if (!strcmp(attr->name, "last_change"))
5531                         IMAP_FOLDER_ITEM(item)->last_change = atoi(attr->value);
5532         }
5533         if (IMAP_FOLDER_ITEM(item)->last_change == 0)
5534                 IMAP_FOLDER_ITEM(item)->last_change = time(NULL);
5535 #endif
5536 }
5537
5538 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item)
5539 {
5540         XMLTag *tag;
5541
5542         tag = folder_item_get_xml(folder, item);
5543
5544 #ifdef HAVE_LIBETPAN
5545         xml_tag_add_attr(tag, xml_attr_new_int("uidnext",
5546                         IMAP_FOLDER_ITEM(item)->uid_next));
5547         xml_tag_add_attr(tag, xml_attr_new_int("last_sync",
5548                         IMAP_FOLDER_ITEM(item)->last_sync));
5549         xml_tag_add_attr(tag, xml_attr_new_int("last_change",
5550                         IMAP_FOLDER_ITEM(item)->last_change));
5551
5552 #endif
5553         return tag;
5554 }
5555
5556 /* ===================================================================
5557  * UTF-7 conversion routines as in RFC 2192
5558  * ===================================================================
5559  * These two functions from:
5560  * libimap library.
5561  * Copyright (C) 2003-2004 Pawel Salek. */
5562
5563 /* UTF7 modified base64 alphabet */
5564 static char base64chars[] =
5565   "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+,";
5566 #define UNDEFINED 64
5567
5568 /* UTF16 definitions */
5569 #define UTF16MASK       0x03FFUL
5570 #define UTF16SHIFT      10
5571 #define UTF16BASE       0x10000UL
5572 #define UTF16HIGHSTART  0xD800UL
5573 #define UTF16HIGHEND    0xDBFFUL
5574 #define UTF16LOSTART    0xDC00UL
5575 #define UTF16LOEND      0xDFFFUL
5576
5577
5578 /* Convert an IMAP mailbox to a UTF-8 string.
5579  *  dst needs to have roughly 4 times the storage space of src
5580  *    Hex encoding can triple the size of the input
5581  *    UTF-7 can be slightly denser than UTF-8
5582  *     (worst case: 8 octets UTF-7 becomes 9 octets UTF-8)
5583  */
5584 char* imap_modified_utf7_to_utf8(const char *mbox, gboolean change_spaces)
5585 {
5586   unsigned c, i, bitcount;
5587   unsigned long ucs4, utf16, bitbuf;
5588   unsigned char base64[256];
5589   const char *src;
5590   char *dst, *res  = malloc(2*strlen(mbox)+1);
5591
5592   bitbuf = 0;
5593   dst = res;
5594   src = mbox;
5595   if(!dst) return NULL;
5596   /* initialize modified base64 decoding table */
5597   memset(base64, UNDEFINED, sizeof (base64));
5598   for (i = 0; i < sizeof (base64chars); ++i) {
5599     base64[(unsigned)base64chars[i]] = i;
5600   }
5601
5602   /* loop until end of string */
5603   while (*src != '\0') {
5604     c = *src++;
5605     /* deal with literal characters and &- */
5606     if (c != '&' || *src == '-') {
5607       /* encode literally */
5608       if (change_spaces && c == '_')
5609         *dst++ = ' ';
5610       else
5611         *dst++ = c;
5612       /* skip over the '-' if this is an &- sequence */
5613       if (c == '&') ++src;
5614     } else {
5615       /* convert modified UTF-7 -> UTF-16 -> UCS-4 -> UTF-8 -> HEX */
5616       bitbuf = 0;
5617       bitcount = 0;
5618       ucs4 = 0;
5619       while ((c = base64[(unsigned char) *src]) != UNDEFINED) {
5620         ++src;
5621         bitbuf = (bitbuf << 6) | c;
5622         bitcount += 6;
5623         /* enough bits for a UTF-16 character? */
5624         if (bitcount >= 16) {
5625           bitcount -= 16;
5626           utf16 = (bitcount ? bitbuf >> bitcount
5627                    : bitbuf) & 0xffff;
5628           /* convert UTF16 to UCS4 */
5629           if
5630             (utf16 >= UTF16HIGHSTART && utf16 <= UTF16HIGHEND) {
5631             ucs4 = (utf16 - UTF16HIGHSTART) << UTF16SHIFT;
5632             continue;
5633           } else if
5634             (utf16 >= UTF16LOSTART && utf16 <= UTF16LOEND) {
5635             ucs4 += utf16 - UTF16LOSTART + UTF16BASE;
5636           } else {
5637             ucs4 = utf16;
5638           }
5639
5640           /* convert UTF-16 range of UCS4 to UTF-8 */
5641           if (ucs4 <= 0x7fUL) {
5642             dst[0] = ucs4;
5643             dst += 1;
5644           } else if (ucs4 <= 0x7ffUL) {
5645             dst[0] = 0xc0 | (ucs4 >> 6);
5646             dst[1] = 0x80 | (ucs4 & 0x3f);
5647             dst += 2;
5648           } else if (ucs4 <= 0xffffUL) {
5649             dst[0] = 0xe0 | (ucs4 >> 12);
5650             dst[1] = 0x80 | ((ucs4 >> 6) & 0x3f);
5651             dst[2] = 0x80 | (ucs4 & 0x3f);
5652             dst += 3;
5653           } else {
5654             dst[0] = 0xf0 | (ucs4 >> 18);
5655             dst[1] = 0x80 | ((ucs4 >> 12) & 0x3f);
5656             dst[2] = 0x80 | ((ucs4 >> 6) & 0x3f);
5657             dst[3] = 0x80 | (ucs4 & 0x3f);
5658             dst += 4;
5659           }
5660         }
5661       }
5662       /* skip over trailing '-' in modified UTF-7 encoding */
5663       if (*src == '-') ++src;
5664     }
5665   }
5666   /* terminate destination string */
5667   *dst = '\0';
5668   return res;
5669 }
5670
5671 /* Convert hex coded UTF-8 string to modified UTF-7 IMAP mailbox
5672  *  dst should be about twice the length of src to deal with non-hex
5673  *  coded URLs
5674  */
5675 char* imap_utf8_to_modified_utf7(const char *src, gboolean change_spaces)
5676 {
5677   unsigned int utf8pos, utf8total, c, utf7mode, bitstogo, utf16flag;
5678   unsigned long ucs4 = 0, bitbuf = 0;
5679
5680   /* initialize hex lookup table */
5681   char *dst, *res = malloc(2*strlen(src)+1);
5682   dst = res;
5683   if(!dst) return NULL;
5684
5685   utf7mode = 0;
5686   utf8total = 0;
5687   bitstogo = 0;
5688   utf8pos = 0;
5689   while ((c = (unsigned char)*src) != '\0') {
5690     ++src;
5691     /* normal character? */
5692     if (c >= ' ' && c <= '~' && (c != '_' || !change_spaces)) {
5693       /* switch out of UTF-7 mode */
5694       if (utf7mode) {
5695         if (bitstogo) {
5696           *dst++ = base64chars[(bitbuf << (6 - bitstogo)) & 0x3F];
5697         }
5698         *dst++ = '-';
5699         utf7mode = 0;
5700         utf8pos  = 0;
5701         bitstogo = 0;
5702         utf8total= 0;
5703       }
5704       if (change_spaces && c == ' ')
5705         *dst++ = '_';
5706       else
5707         *dst++ = c;
5708       /* encode '&' as '&-' */
5709       if (c == '&') {
5710         *dst++ = '-';
5711       }
5712       continue;
5713     }
5714     /* switch to UTF-7 mode */
5715     if (!utf7mode) {
5716       *dst++ = '&';
5717       utf7mode = 1;
5718     }
5719     /* Encode US-ASCII characters as themselves */
5720     if (c < 0x80) {
5721       ucs4 = c;
5722       utf8total = 1;
5723     } else if (utf8total) {
5724       /* save UTF8 bits into UCS4 */
5725       ucs4 = (ucs4 << 6) | (c & 0x3FUL);
5726       if (++utf8pos < utf8total) {
5727         continue;
5728       }
5729     } else {
5730       utf8pos = 1;
5731       if (c < 0xE0) {
5732         utf8total = 2;
5733         ucs4 = c & 0x1F;
5734       } else if (c < 0xF0) {
5735         utf8total = 3;
5736         ucs4 = c & 0x0F;
5737       } else {
5738         /* NOTE: can't convert UTF8 sequences longer than 4 */
5739         utf8total = 4;
5740         ucs4 = c & 0x03;
5741       }
5742       continue;
5743     }
5744     /* loop to split ucs4 into two utf16 chars if necessary */
5745     utf8total = 0;
5746     do {
5747       if (ucs4 >= UTF16BASE) {
5748         ucs4 -= UTF16BASE;
5749         bitbuf = (bitbuf << 16) | ((ucs4 >> UTF16SHIFT)
5750                                    + UTF16HIGHSTART);
5751         ucs4 = (ucs4 & UTF16MASK) + UTF16LOSTART;
5752         utf16flag = 1;
5753       } else {
5754         bitbuf = (bitbuf << 16) | ucs4;
5755         utf16flag = 0;
5756       }
5757       bitstogo += 16;
5758       /* spew out base64 */
5759       while (bitstogo >= 6) {
5760         bitstogo -= 6;
5761         *dst++ = base64chars[(bitstogo ? (bitbuf >> bitstogo)
5762                               : bitbuf)
5763                              & 0x3F];
5764       }
5765     } while (utf16flag);
5766   }
5767   /* if in UTF-7 mode, finish in ASCII */
5768   if (utf7mode) {
5769     if (bitstogo) {
5770       *dst++ = base64chars[(bitbuf << (6 - bitstogo)) & 0x3F];
5771     }
5772     *dst++ = '-';
5773   }
5774   /* tie off string */
5775   *dst = '\0';
5776   return res;
5777 }