src/imap.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2007 Hiroyuki Yamamoto and the Claws Mail team
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #  include "config.h"
  22 #endif
  23
  24 #include "defs.h"
  25
  26 #include <glib.h>
  27 #include <glib/gi18n.h>
  28 #include <stdio.h>
  29 #include <string.h>
  30 #include "imap.h"
  31 #include "imap_gtk.h"
  32 #include "inc.h"
  33 #include "xml.h"
  34 #include "alertpanel.h"
  35
  36 #ifdef HAVE_LIBETPAN
  37
  38 #include <stdlib.h>
  39 #include <dirent.h>
  40 #include <unistd.h>
  41 #include <ctype.h>
  42 #include <time.h>
  43 #include <errno.h>
  44 #if HAVE_ICONV
  45 #  include <iconv.h>
  46 #endif
  47
  48 #if (defined(USE_OPENSSL) || defined (USE_GNUTLS))
  49 #  include "ssl.h"
  50 #endif
  51
  52 #include "folder.h"
  53 #include "session.h"
  54 #include "procmsg.h"
  55 #include "socket.h"
  56 #include "recv.h"
  57 #include "procheader.h"
  58 #include "prefs_account.h"
  59 #include "codeconv.h"
  60 #include "md5.h"
  61 #include "base64.h"
  62 #include "utils.h"
  63 #include "prefs_common.h"
  64 #include "inputdialog.h"
  65 #include "log.h"
  66 #include "remotefolder.h"
  67 #include "claws.h"
  68 #include "statusbar.h"
  69 #include "msgcache.h"
  70 #include "imap-thread.h"
  71 #include "account.h"
  72 #include "tags.h"
  73 #include "main.h"
  74
  75 typedef struct _IMAPFolder      IMAPFolder;
  76 typedef struct _IMAPSession     IMAPSession;
  77 typedef struct _IMAPNameSpace   IMAPNameSpace;
  78 typedef struct _IMAPFolderItem  IMAPFolderItem;
  79
  80 #include "prefs_account.h"
  81
  82 #define IMAP_FOLDER(obj)        ((IMAPFolder *)obj)
  83 #define IMAP_FOLDER_ITEM(obj)   ((IMAPFolderItem *)obj)
  84 #define IMAP_SESSION(obj)       ((IMAPSession *)obj)
  85
  86 struct _IMAPFolder
  87 {
  88         RemoteFolder rfolder;
  89
  90         /* list of IMAPNameSpace */
  91         GList *ns_personal;
  92         GList *ns_others;
  93         GList *ns_shared;
  94         gchar last_seen_separator;
  95         guint refcnt;
  96         guint max_set_size;
  97 };
  98
  99 struct _IMAPSession
 100 {
 101         Session session;
 102
 103         gboolean authenticated;
 104
 105         GSList *capability;
 106         gboolean uidplus;
 107
 108         gchar *mbox;
 109         guint cmd_count;
 110
 111         /* CLAWS */
 112         gboolean folder_content_changed;
 113         guint exists;
 114         guint recent;
 115         guint expunge;
 116         guint unseen;
 117         guint uid_validity;
 118         guint uid_next;
 119
 120         Folder * folder;
 121         gboolean busy;
 122         gboolean cancelled;
 123         gboolean sens_update_block;
 124 };
 125
 126 struct _IMAPNameSpace
 127 {
 128         gchar *name;
 129         gchar separator;
 130 };
 131
 132 #define IMAPBUFSIZE     8192
 133
 134 #define IMAP_IS_SEEN(flags)     ((flags & IMAP_FLAG_SEEN) != 0)
 135 #define IMAP_IS_ANSWERED(flags) ((flags & IMAP_FLAG_ANSWERED) != 0)
 136 #define IMAP_IS_FLAGGED(flags)  ((flags & IMAP_FLAG_FLAGGED) != 0)
 137 #define IMAP_IS_DELETED(flags)  ((flags & IMAP_FLAG_DELETED) != 0)
 138 #define IMAP_IS_DRAFT(flags)    ((flags & IMAP_FLAG_DRAFT) != 0)
 139 #define IMAP_IS_FORWARDED(flags)        ((flags & IMAP_FLAG_FORWARDED) != 0)
 140 #define IMAP_IS_SPAM(flags)     ((flags & IMAP_FLAG_SPAM) != 0)
 141 #define IMAP_IS_HAM(flags)      ((flags & IMAP_FLAG_HAM) != 0)
 142
 143
 144 #define IMAP4_PORT      143
 145 #if (defined(USE_OPENSSL) || defined (USE_GNUTLS))
 146 #define IMAPS_PORT      993
 147 #endif
 148
 149 #define IMAP_CMD_LIMIT  1000
 150
 151 enum {
 152         ITEM_CAN_CREATE_FLAGS_UNKNOWN = 0,
 153         ITEM_CAN_CREATE_FLAGS,
 154         ITEM_CANNOT_CREATE_FLAGS
 155 };
 156
 157 struct _IMAPFolderItem
 158 {
 159         FolderItem item;
 160
 161         guint lastuid;
 162         guint uid_next;
 163         GSList *uid_list;
 164         gboolean batching;
 165
 166         GHashTable *flags_set_table;
 167         GHashTable *flags_unset_table;
 168         guint32 last_change;
 169         guint32 last_sync;
 170         gboolean should_update;
 171         gboolean should_trash_cache;
 172         gint can_create_flags;
 173
 174         GHashTable *tags_set_table;
 175         GHashTable *tags_unset_table;
 176         GSList *ok_flags;
 177
 178 };
 179
 180 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item);
 181 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag);
 182
 183 static void imap_folder_init            (Folder         *folder,
 184                                          const gchar    *name,
 185                                          const gchar    *path);
 186
 187 static Folder   *imap_folder_new        (const gchar    *name,
 188                                          const gchar    *path);
 189 static void      imap_folder_destroy    (Folder         *folder);
 190
 191 static IMAPSession *imap_session_new    (Folder         *folder,
 192                                          const PrefsAccount     *account);
 193 static gint     imap_session_authenticate(IMAPSession   *session,
 194                                           PrefsAccount  *account);
 195 static void     imap_session_destroy    (Session        *session);
 196
 197 static gchar   *imap_fetch_msg          (Folder         *folder,
 198                                          FolderItem     *item,
 199                                          gint            uid);
 200 static gchar   *imap_fetch_msg_full     (Folder         *folder,
 201                                          FolderItem     *item,
 202                                          gint            uid,
 203                                          gboolean        headers,
 204                                          gboolean        body);
 205 static void     imap_remove_cached_msg  (Folder         *folder,
 206                                          FolderItem     *item,
 207                                          MsgInfo        *msginfo);
 208 static gint     imap_add_msg            (Folder         *folder,
 209                                          FolderItem     *dest,
 210                                          const gchar    *file,
 211                                          MsgFlags       *flags);
 212 static gint     imap_add_msgs           (Folder         *folder,
 213                                          FolderItem     *dest,
 214                                          GSList         *file_list,
 215                                          GRelation      *relation);
 216
 217 static gint     imap_copy_msg           (Folder         *folder,
 218                                          FolderItem     *dest,
 219                                          MsgInfo        *msginfo);
 220 static gint     imap_copy_msgs          (Folder         *folder,
 221                                          FolderItem     *dest,
 222                                          MsgInfoList    *msglist,
 223                                          GRelation      *relation);
 224
 225 static gint     imap_remove_msg         (Folder         *folder,
 226                                          FolderItem     *item,
 227                                          gint            uid);
 228 static gint     imap_remove_msgs        (Folder         *folder,
 229                                          FolderItem     *dest,
 230                                          MsgInfoList    *msglist,
 231                                          GRelation      *relation);
 232 static gint     imap_remove_all_msg     (Folder         *folder,
 233                                          FolderItem     *item);
 234
 235 static gboolean imap_is_msg_changed     (Folder         *folder,
 236                                          FolderItem     *item,
 237                                          MsgInfo        *msginfo);
 238
 239 static gint     imap_close              (Folder         *folder,
 240                                          FolderItem     *item);
 241
 242 static gint     imap_scan_tree          (Folder         *folder);
 243
 244 static gint     imap_create_tree        (Folder         *folder);
 245
 246 static FolderItem *imap_create_folder   (Folder         *folder,
 247                                          FolderItem     *parent,
 248                                          const gchar    *name);
 249 static gint     imap_rename_folder      (Folder         *folder,
 250                                          FolderItem     *item,
 251                                          const gchar    *name);
 252 static gint     imap_remove_folder      (Folder         *folder,
 253                                          FolderItem     *item);
 254
 255 static FolderItem *imap_folder_item_new (Folder         *folder);
 256 static void imap_folder_item_destroy    (Folder         *folder,
 257                                          FolderItem     *item);
 258
 259 static IMAPSession *imap_session_get    (Folder         *folder);
 260
 261 static gint imap_auth                   (IMAPSession    *session,
 262                                          const gchar    *user,
 263                                          const gchar    *pass,
 264                                          IMAPAuthType    type);
 265
 266 static gint imap_scan_tree_recursive    (IMAPSession    *session,
 267                                          FolderItem     *item,
 268                                          gboolean        subs_only);
 269
 270 static void imap_create_missing_folders (Folder         *folder);
 271 static FolderItem *imap_create_special_folder
 272                                         (Folder                 *folder,
 273                                          SpecialFolderItemType   stype,
 274                                          const gchar            *name);
 275
 276 static gint imap_do_copy_msgs           (Folder         *folder,
 277                                          FolderItem     *dest,
 278                                          MsgInfoList    *msglist,
 279                                          GRelation      *relation);
 280
 281 static void imap_delete_all_cached_messages     (FolderItem     *item);
 282 static void imap_set_batch              (Folder         *folder,
 283                                          FolderItem     *item,
 284                                          gboolean        batch);
 285 static gint imap_set_message_flags      (IMAPSession    *session,
 286                                          IMAPFolderItem *item,
 287                                          MsgNumberList  *numlist,
 288                                          IMAPFlags       flags,
 289                                          GSList         *tags,
 290                                          gboolean        is_set);
 291 static gint imap_select                 (IMAPSession    *session,
 292                                          IMAPFolder     *folder,
 293                                          FolderItem     *item,
 294                                          gint           *exists,
 295                                          gint           *recent,
 296                                          gint           *unseen,
 297                                          guint32        *uid_validity,
 298                                          gint           *can_create_flags,
 299                                          gboolean        block);
 300 static gint imap_status                 (IMAPSession    *session,
 301                                          IMAPFolder     *folder,
 302                                          const gchar    *path,
 303                                          IMAPFolderItem *item,
 304                                          gint           *messages,
 305                                          guint32        *uid_next,
 306                                          guint32        *uid_validity,
 307                                          gint           *unseen,
 308                                          gboolean        block);
 309 static void     imap_commit_tags        (FolderItem     *item,
 310                                          MsgInfo        *msginfo,
 311                                          GSList         *set_tags,
 312                                          GSList         *unset_tags);
 313
 314 static gchar imap_get_path_separator            (IMAPSession    *session,
 315                                                  IMAPFolder     *folder,
 316                                                  const gchar    *path,
 317                                                  gint           *ok);
 318 static gchar *imap_get_real_path                (IMAPSession    *session,
 319                                                  IMAPFolder     *folder,
 320                                                  const gchar    *path,
 321                                                  gint           *ok);
 322 #ifdef HAVE_LIBETPAN
 323 static void imap_synchronise            (FolderItem     *item, gint days);
 324 #endif
 325 static gboolean imap_is_busy            (Folder *folder);
 326
 327 static void imap_free_capabilities      (IMAPSession    *session);
 328
 329 /* low-level IMAP4rev1 commands */
 330 static gint imap_cmd_login      (IMAPSession    *session,
 331                                  const gchar    *user,
 332                                  const gchar    *pass,
 333                                  const gchar    *type);
 334 static gint imap_cmd_noop       (IMAPSession    *session);
 335 #if (defined(USE_OPENSSL) || defined (USE_GNUTLS))
 336 static gint imap_cmd_starttls   (IMAPSession    *session);
 337 #endif
 338 static gint imap_cmd_select     (IMAPSession    *session,
 339                                  const gchar    *folder,
 340                                  gint           *exists,
 341                                  gint           *recent,
 342                                  gint           *unseen,
 343                                  guint32        *uid_validity,
 344                                  gint           *can_create_flags,
 345                                  GSList         **ok_flags,
 346                                  gboolean        block);
 347 static gint imap_cmd_close      (IMAPSession    *session);
 348 static gint imap_cmd_examine    (IMAPSession    *session,
 349                                  const gchar    *folder,
 350                                  gint           *exists,
 351                                  gint           *recent,
 352                                  gint           *unseen,
 353                                  guint32        *uid_validity,
 354                                  gboolean        block);
 355 static gint imap_cmd_create     (IMAPSession    *sock,
 356                                  const gchar    *folder);
 357 static gint imap_cmd_rename     (IMAPSession    *sock,
 358                                  const gchar    *oldfolder,
 359                                  const gchar    *newfolder);
 360 static gint imap_cmd_delete     (IMAPSession    *session,
 361                                  const gchar    *folder);
 362 static gint imap_cmd_fetch      (IMAPSession    *sock,
 363                                  guint32         uid,
 364                                  const gchar    *filename,
 365                                  gboolean        headers,
 366                                  gboolean        body);
 367 static gint imap_cmd_append     (IMAPSession    *session,
 368                                  IMAPFolderItem *item,
 369                                  const gchar    *destfolder,
 370                                  const gchar    *file,
 371                                  IMAPFlags       flags,
 372                                  guint32        *new_uid);
 373 static gint imap_cmd_copy       (IMAPSession *session,
 374                                  struct mailimap_set * set,
 375                                  const gchar *destfolder,
 376                                  GRelation *uid_mapping,
 377                                  struct mailimap_set ** source,
 378                                  struct mailimap_set ** dest);
 379 static gint imap_cmd_store      (IMAPSession    *session,
 380                                  IMAPFolderItem *item,
 381                                  struct mailimap_set * set,
 382                                  IMAPFlags flags,
 383                                  GSList *tags,
 384                                  int do_add);
 385 static gint imap_cmd_expunge    (IMAPSession    *session);
 386
 387 static void imap_path_separator_subst           (gchar          *str,
 388                                                  gchar           separator);
 389
 390 static gboolean imap_rename_folder_func         (GNode          *node,
 391                                                  gpointer        data);
 392 static gint imap_get_num_list                   (Folder         *folder,
 393                                                  FolderItem     *item,
 394                                                  GSList        **list,
 395                                                  gboolean       *old_uids_valid);
 396 static GSList *imap_get_msginfos                (Folder         *folder,
 397                                                  FolderItem     *item,
 398                                                  GSList         *msgnum_list);
 399 static MsgInfo *imap_get_msginfo                (Folder         *folder,
 400                                                  FolderItem     *item,
 401                                                  gint            num);
 402 static gboolean imap_scan_required              (Folder         *folder,
 403                                                  FolderItem     *item);
 404 static void imap_change_flags                   (Folder         *folder,
 405                                                  FolderItem     *item,
 406                                                  MsgInfo        *msginfo,
 407                                                  MsgPermFlags    newflags);
 408 static gint imap_get_flags                      (Folder         *folder,
 409                                                  FolderItem     *item,
 410                                                  MsgInfoList    *msglist,
 411                                                  GRelation      *msgflags);
 412 static gchar *imap_folder_get_path              (Folder         *folder);
 413 static gchar *imap_item_get_path                (Folder         *folder,
 414                                                  FolderItem     *item);
 415 static MsgInfo *imap_parse_msg(const gchar *file, FolderItem *item);
 416
 417
 418 /* data types conversion libetpan <-> claws */
 419 static GSList * imap_list_from_lep(IMAPFolder * folder,
 420                                    clist * list, const gchar * real_path, gboolean all);
 421 static GSList * imap_get_lep_set_from_numlist(IMAPFolder *folder, MsgNumberList *numlist);
 422 static GSList * imap_get_lep_set_from_msglist(IMAPFolder *folder, MsgInfoList *msglist);
 423 static GSList * imap_uid_list_from_lep(clist * list);
 424 static GSList * imap_uid_list_from_lep_tab(carray * list);
 425 static void imap_flags_hash_from_lep_uid_flags_tab(carray * list,
 426                                                    GHashTable * hash,
 427                                                    GHashTable *tags_hash);
 428 static MsgInfo *imap_envelope_from_lep(struct imap_fetch_env_info * info,
 429                                        FolderItem *item);
 430 static void imap_lep_set_free(GSList *seq_list);
 431 static struct mailimap_flag_list * imap_flag_to_lep(IMAPFolderItem *item, IMAPFlags flags, GSList *tags);
 432
 433 typedef struct _hashtable_data {
 434         GSList *msglist;
 435         IMAPFolderItem *item;
 436 } hashtable_data;
 437
 438 static FolderClass imap_class;
 439
 440 FolderClass *imap_get_class(void)
 441 {
 442         if (imap_class.idstr == NULL) {
 443                 imap_class.type = F_IMAP;
 444                 imap_class.idstr = "imap";
 445                 imap_class.uistr = "IMAP4";
 446
 447                 /* Folder functions */
 448                 imap_class.new_folder = imap_folder_new;
 449                 imap_class.destroy_folder = imap_folder_destroy;
 450                 imap_class.scan_tree = imap_scan_tree;
 451                 imap_class.create_tree = imap_create_tree;
 452
 453                 /* FolderItem functions */
 454                 imap_class.item_new = imap_folder_item_new;
 455                 imap_class.item_destroy = imap_folder_item_destroy;
 456                 imap_class.item_get_path = imap_item_get_path;
 457                 imap_class.create_folder = imap_create_folder;
 458                 imap_class.rename_folder = imap_rename_folder;
 459                 imap_class.remove_folder = imap_remove_folder;
 460                 imap_class.close = imap_close;
 461                 imap_class.get_num_list = imap_get_num_list;
 462                 imap_class.scan_required = imap_scan_required;
 463                 imap_class.set_xml = folder_set_xml;
 464                 imap_class.get_xml = folder_get_xml;
 465                 imap_class.item_set_xml = imap_item_set_xml;
 466                 imap_class.item_get_xml = imap_item_get_xml;
 467
 468                 /* Message functions */
 469                 imap_class.get_msginfo = imap_get_msginfo;
 470                 imap_class.get_msginfos = imap_get_msginfos;
 471                 imap_class.fetch_msg = imap_fetch_msg;
 472                 imap_class.fetch_msg_full = imap_fetch_msg_full;
 473                 imap_class.add_msg = imap_add_msg;
 474                 imap_class.add_msgs = imap_add_msgs;
 475                 imap_class.copy_msg = imap_copy_msg;
 476                 imap_class.copy_msgs = imap_copy_msgs;
 477                 imap_class.remove_msg = imap_remove_msg;
 478                 imap_class.remove_msgs = imap_remove_msgs;
 479                 imap_class.remove_all_msg = imap_remove_all_msg;
 480                 imap_class.is_msg_changed = imap_is_msg_changed;
 481                 imap_class.change_flags = imap_change_flags;
 482                 imap_class.get_flags = imap_get_flags;
 483                 imap_class.set_batch = imap_set_batch;
 484                 imap_class.synchronise = imap_synchronise;
 485                 imap_class.remove_cached_msg = imap_remove_cached_msg;
 486                 imap_class.commit_tags = imap_commit_tags;
 487 #ifdef USE_PTREAD
 488                 pthread_mutex_init(&imap_mutex, NULL);
 489 #endif
 490         }
 491
 492         return &imap_class;
 493 }
 494
 495 static void imap_refresh_sensitivity (IMAPSession *session)
 496 {
 497         MainWindow *mainwin;
 498
 499         if (session->sens_update_block)
 500                 return;
 501         mainwin = mainwindow_get_mainwindow();
 502         if (mainwin) {
 503                 toolbar_main_set_sensitive(mainwin);
 504                 main_window_set_menu_sensitive(mainwin);
 505         }
 506 }
 507
 508 static void lock_session(IMAPSession *session)
 509 {
 510         if (session) {
 511                 debug_print("locking session %p (%d)\n", session, session->busy);
 512                 if (session->busy)
 513                         debug_print("         SESSION WAS LOCKED !!      \n");
 514                 session->busy = TRUE;
 515                 imap_refresh_sensitivity(session);
 516         } else {
 517                 debug_print("can't lock null session\n");
 518         }
 519 }
 520
 521 static void unlock_session(IMAPSession *session)
 522 {
 523         if (session) {
 524                 debug_print("unlocking session %p\n", session);
 525                 session->busy = FALSE;
 526                 imap_refresh_sensitivity(session);
 527         } else {
 528                 debug_print("can't unlock null session\n");
 529         }
 530 }
 531
 532 static void imap_disc_session_destroy(IMAPSession *session)
 533 {
 534         RemoteFolder *rfolder = REMOTE_FOLDER(IMAP_SESSION(session)->folder);
 535
 536         if (!rfolder)
 537                 return;
 538         if (!session)
 539                 return;
 540         log_warning(LOG_PROTOCOL, _("IMAP4 connection broken\n"));
 541         SESSION(session)->state = SESSION_DISCONNECTED;
 542         SESSION(session)->sock = NULL;
 543 }
 544
 545 static gboolean is_fatal(int libetpan_errcode)
 546 {
 547         switch(libetpan_errcode) {
 548         case MAILIMAP_ERROR_STREAM:
 549         case MAILIMAP_ERROR_PROTOCOL:
 550         case MAILIMAP_ERROR_PARSE:
 551         case MAILIMAP_ERROR_BAD_STATE:
 552                 return TRUE;
 553         default:
 554                 return FALSE;
 555         }
 556 }
 557
 558 static void imap_handle_error(Session *session, int libetpan_errcode)
 559 {
 560         const gchar *session_server = (session ? session->server:"(null)");
 561         switch(libetpan_errcode) {
 562         case MAILIMAP_NO_ERROR:
 563                 return;
 564         case MAILIMAP_NO_ERROR_AUTHENTICATED:
 565                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: authenticated\n"), session_server);
 566                 break;
 567         case MAILIMAP_NO_ERROR_NON_AUTHENTICATED:
 568                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: not authenticated\n"), session_server);
 569                 break;
 570         case MAILIMAP_ERROR_BAD_STATE:
 571                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: bad state\n"), session_server);
 572                 break;
 573         case MAILIMAP_ERROR_STREAM:
 574                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: stream error\n"), session_server);
 575                 break;
 576         case MAILIMAP_ERROR_PARSE:
 577                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: parse error "
 578                                             "(very probably non-RFC compliance from the server)\n"), session_server);
 579                 break;
 580         case MAILIMAP_ERROR_CONNECTION_REFUSED:
 581                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: connection refused\n"), session_server);
 582                 break;
 583         case MAILIMAP_ERROR_MEMORY:
 584                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: memory error\n"), session_server);
 585                 break;
 586         case MAILIMAP_ERROR_FATAL:
 587                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: fatal error\n"), session_server);
 588                 break;
 589         case MAILIMAP_ERROR_PROTOCOL:
 590                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: protocol error"
 591                                             "(very probably non-RFC compliance from the server)\n"), session_server);
 592                 break;
 593         case MAILIMAP_ERROR_DONT_ACCEPT_CONNECTION:
 594                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: connection not accepted\n"), session_server);
 595                 break;
 596         case MAILIMAP_ERROR_APPEND:
 597                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: APPEND error\n"), session_server);
 598                 break;
 599         case MAILIMAP_ERROR_NOOP:
 600                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: NOOP error\n"), session_server);
 601                 break;
 602         case MAILIMAP_ERROR_LOGOUT:
 603                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: LOGOUT error\n"), session_server);
 604                 break;
 605         case MAILIMAP_ERROR_CAPABILITY:
 606                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: CAPABILITY error\n"), session_server);
 607                 break;
 608         case MAILIMAP_ERROR_CHECK:
 609                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: CHECK error\n"), session_server);
 610                 break;
 611         case MAILIMAP_ERROR_CLOSE:
 612                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: CLOSE error\n"), session_server);
 613                 break;
 614         case MAILIMAP_ERROR_EXPUNGE:
 615                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: EXPUNGE error\n"), session_server);
 616                 break;
 617         case MAILIMAP_ERROR_COPY:
 618                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: COPY error\n"), session_server);
 619                 break;
 620         case MAILIMAP_ERROR_UID_COPY:
 621                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: UID COPY error\n"), session_server);
 622                 break;
 623         case MAILIMAP_ERROR_CREATE:
 624                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: CREATE error\n"), session_server);
 625                 break;
 626         case MAILIMAP_ERROR_DELETE:
 627                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: DELETE error\n"), session_server);
 628                 break;
 629         case MAILIMAP_ERROR_EXAMINE:
 630                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: EXAMINE error\n"), session_server);
 631                 break;
 632         case MAILIMAP_ERROR_FETCH:
 633                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: FETCH error\n"), session_server);
 634                 break;
 635         case MAILIMAP_ERROR_UID_FETCH:
 636                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: UID FETCH error\n"), session_server);
 637                 break;
 638         case MAILIMAP_ERROR_LIST:
 639                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: LIST error\n"), session_server);
 640                 break;
 641         case MAILIMAP_ERROR_LOGIN:
 642                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: LOGIN error\n"), session_server);
 643                 break;
 644         case MAILIMAP_ERROR_LSUB:
 645                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: LSUB error\n"), session_server);
 646                 break;
 647         case MAILIMAP_ERROR_RENAME:
 648                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: RENAME error\n"), session_server);
 649                 break;
 650         case MAILIMAP_ERROR_SEARCH:
 651                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: SEARCH error\n"), session_server);
 652                 break;
 653         case MAILIMAP_ERROR_UID_SEARCH:
 654                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: UID SEARCH error\n"), session_server);
 655                 break;
 656         case MAILIMAP_ERROR_SELECT:
 657                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: SELECT error\n"), session_server);
 658                 break;
 659         case MAILIMAP_ERROR_STATUS:
 660                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: STATUS error\n"), session_server);
 661                 break;
 662         case MAILIMAP_ERROR_STORE:
 663                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: STORE error\n"), session_server);
 664                 break;
 665         case MAILIMAP_ERROR_UID_STORE:
 666                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: UID STORE error\n"), session_server);
 667                 break;
 668         case MAILIMAP_ERROR_SUBSCRIBE:
 669                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: SUBSCRIBE error\n"), session_server);
 670                 break;
 671         case MAILIMAP_ERROR_UNSUBSCRIBE:
 672                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: UNSUBSCRIBE error\n"), session_server);
 673                 break;
 674         case MAILIMAP_ERROR_STARTTLS:
 675                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: STARTTLS error\n"), session_server);
 676                 break;
 677         case MAILIMAP_ERROR_INVAL:
 678                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: INVAL error\n"), session_server);
 679                 break;
 680         case MAILIMAP_ERROR_EXTENSION:
 681                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: EXTENSION error\n"), session_server);
 682                 break;
 683         case MAILIMAP_ERROR_SASL:
 684                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: SASL error\n"), session_server);
 685                 break;
 686 #if (defined(USE_OPENSSL) || defined (USE_GNUTLS))
 687         case MAILIMAP_ERROR_SSL:
 688                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: SSL error\n"), session_server);
 689                 break;
 690 #endif
 691         default:
 692                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: Unknown error [%d]\n"),
 693                         session_server, libetpan_errcode);
 694                 break;
 695         }
 696
 697         if (session && is_fatal(libetpan_errcode)) {
 698                 imap_disc_session_destroy(IMAP_SESSION(session));
 699         } else if (session && !is_fatal(libetpan_errcode)) {
 700                 if (IMAP_SESSION(session)->busy)
 701                         unlock_session(IMAP_SESSION(session));
 702         }
 703 }
 704
 705 static Folder *imap_folder_new(const gchar *name, const gchar *path)
 706 {
 707         Folder *folder;
 708
 709         folder = (Folder *)g_new0(IMAPFolder, 1);
 710         folder->klass = &imap_class;
 711         imap_folder_init(folder, name, path);
 712
 713         return folder;
 714 }
 715
 716 static void imap_folder_destroy(Folder *folder)
 717 {
 718         while (imap_folder_get_refcnt(folder) > 0)
 719                 gtk_main_iteration();
 720
 721         folder_remote_folder_destroy(REMOTE_FOLDER(folder));
 722         imap_done(folder);
 723 }
 724
 725 static void imap_folder_init(Folder *folder, const gchar *name,
 726                              const gchar *path)
 727 {
 728         folder_remote_folder_init((Folder *)folder, name, path);
 729         IMAP_FOLDER(folder)->max_set_size = IMAP_SET_MAX_COUNT;
 730 }
 731
 732 static FolderItem *imap_folder_item_new(Folder *folder)
 733 {
 734         IMAPFolderItem *item;
 735
 736         item = g_new0(IMAPFolderItem, 1);
 737         item->lastuid = 0;
 738         item->uid_next = 0;
 739         item->uid_list = NULL;
 740
 741         return (FolderItem *)item;
 742 }
 743
 744 static void imap_folder_item_destroy(Folder *folder, FolderItem *_item)
 745 {
 746         IMAPFolderItem *item = (IMAPFolderItem *)_item;
 747
 748         g_return_if_fail(item != NULL);
 749         g_slist_free(item->uid_list);
 750
 751         g_free(_item);
 752 }
 753
 754 static gboolean imap_reset_uid_lists_func(GNode *node, gpointer data)
 755 {
 756         IMAPFolderItem *item = (IMAPFolderItem *)node->data;
 757
 758         item->lastuid = 0;
 759         g_slist_free(item->uid_list);
 760         item->uid_list = NULL;
 761
 762         return FALSE;
 763 }
 764
 765 static void imap_reset_uid_lists(Folder *folder)
 766 {
 767         if(folder->node == NULL)
 768                 return;
 769
 770         /* Destroy all uid lists and rest last uid */
 771         g_node_traverse(folder->node, G_IN_ORDER, G_TRAVERSE_ALL, -1, imap_reset_uid_lists_func, NULL);
 772 }
 773
 774 static int imap_get_capabilities(IMAPSession *session)
 775 {
 776         struct mailimap_capability_data *capabilities = NULL;
 777         clistiter *cur;
 778         int result = -1;
 779
 780         if (session->capability != NULL)
 781                 return MAILIMAP_NO_ERROR;
 782
 783         capabilities = imap_threaded_capability(session->folder, &result);
 784
 785         if (result != MAILIMAP_NO_ERROR) {
 786                 return result;
 787         }
 788
 789         if (capabilities == NULL) {
 790                 return MAILIMAP_NO_ERROR;
 791         }
 792
 793         for(cur = clist_begin(capabilities->cap_list) ; cur != NULL ;
 794             cur = clist_next(cur)) {
 795                 struct mailimap_capability * cap =
 796                         clist_content(cur);
 797                 if (!cap || cap->cap_data.cap_name == NULL)
 798                         continue;
 799                 session->capability = g_slist_append
 800                                 (session->capability,
 801                                  g_strdup(cap->cap_data.cap_name));
 802                 debug_print("got capa %s\n", cap->cap_data.cap_name);
 803         }
 804         mailimap_capability_data_free(capabilities);
 805         return MAILIMAP_NO_ERROR;
 806 }
 807
 808 static gboolean imap_has_capability(IMAPSession *session, const gchar *cap)
 809 {
 810         GSList *cur;
 811         for (cur = session->capability; cur; cur = cur->next) {
 812                 if (!g_ascii_strcasecmp(cur->data, cap))
 813                         return TRUE;
 814         }
 815         return FALSE;
 816 }
 817
 818 static gint imap_auth(IMAPSession *session, const gchar *user, const gchar *pass,
 819                       IMAPAuthType type)
 820 {
 821         gint ok = MAILIMAP_ERROR_LOGIN;
 822         static time_t last_login_err = 0;
 823         gchar *ext_info = "";
 824         int r;
 825         gchar *server = NULL;
 826         if ((r = imap_get_capabilities(session)) != MAILIMAP_NO_ERROR) {
 827                 imap_handle_error(SESSION(session), r);
 828                 return r;
 829         }
 830         server = g_strdup(SESSION(session)->server);
 831         switch(type) {
 832         case IMAP_AUTH_ANON:
 833                 ok = imap_cmd_login(session, user, pass, "ANONYMOUS");
 834                 break;
 835         case IMAP_AUTH_CRAM_MD5:
 836                 ok = imap_cmd_login(session, user, pass, "CRAM-MD5");
 837                 break;
 838         case IMAP_AUTH_DIGEST_MD5:
 839                 ok = imap_cmd_login(session, user, pass, "DIGEST-MD5");
 840                 break;
 841         case IMAP_AUTH_LOGIN:
 842                 ok = imap_cmd_login(session, user, pass, "LOGIN");
 843                 break;
 844         case IMAP_AUTH_GSSAPI:
 845                 ok = imap_cmd_login(session, user, pass, "GSSAPI");
 846                 break;
 847         default:
 848                 debug_print("capabilities:\n"
 849                                 "\t ANONYMOUS %d\n"
 850                                 "\t CRAM-MD5 %d\n"
 851                                 "\t DIGEST-MD5 %d\n"
 852                                 "\t LOGIN %d\n"
 853                                 "\t GSSAPI %d\n",
 854                         imap_has_capability(session, "ANONYMOUS"),
 855                         imap_has_capability(session, "CRAM-MD5"),
 856                         imap_has_capability(session, "DIGEST-MD5"),
 857                         imap_has_capability(session, "LOGIN"),
 858                         imap_has_capability(session, "GSSAPI"));
 859                 if (imap_has_capability(session, "CRAM-MD5"))
 860                         ok = imap_cmd_login(session, user, pass, "CRAM-MD5");
 861                 if (ok == MAILIMAP_ERROR_LOGIN && imap_has_capability(session, "DIGEST-MD5"))
 862                         ok = imap_cmd_login(session, user, pass, "DIGEST-MD5");
 863                 if (ok == MAILIMAP_ERROR_LOGIN && imap_has_capability(session, "GSSAPI"))
 864                         ok = imap_cmd_login(session, user, pass, "GSSAPI");
 865                 if (ok == MAILIMAP_ERROR_LOGIN) /* we always try LOGIN before giving up */
 866                         ok = imap_cmd_login(session, user, pass, "LOGIN");
 867         }
 868
 869         if (ok == MAILIMAP_NO_ERROR)
 870                 session->authenticated = TRUE;
 871         else {
 872                 if (type == IMAP_AUTH_CRAM_MD5) {
 873                         ext_info = _("\n\nCRAM-MD5 logins only work if libetpan has been "
 874                                      "compiled with SASL support and the "
 875                                      "CRAM-MD5 SASL plugin is installed.");
 876                 }
 877
 878                 if (type == IMAP_AUTH_DIGEST_MD5) {
 879                         ext_info = _("\n\nDIGEST-MD5 logins only work if libetpan has been "
 880                                      "compiled with SASL support and the "
 881                                      "DIGEST-MD5 SASL plugin is installed.");
 882                 }
 883
 884                 if (time(NULL) - last_login_err > 10) {
 885                         if (!prefs_common.no_recv_err_panel) {
 886                                 alertpanel_error_log(_("Connection to %s failed: "
 887                                         "login refused.%s"),
 888                                         server, ext_info);
 889                         } else {
 890                                 log_error(LOG_PROTOCOL, _("Connection to %s failed: "
 891                                         "login refused.%s\n"),
 892                                         server, ext_info);
 893                         }
 894                 }
 895                 last_login_err = time(NULL);
 896         }
 897         g_free(server);
 898         return ok;
 899 }
 900
 901 static IMAPSession *imap_reconnect_if_possible(Folder *folder, IMAPSession *session)
 902 {
 903         RemoteFolder *rfolder = REMOTE_FOLDER(folder);
 904         /* Check if this is the first try to establish a
 905            connection, if yes we don't try to reconnect */
 906         debug_print("reconnecting\n");
 907         if (rfolder->session == NULL) {
 908                 log_warning(LOG_PROTOCOL, _("Connecting to %s failed"),
 909                             folder->account->recv_server);
 910                 SESSION(session)->sock = NULL;
 911                 session_destroy(SESSION(session));
 912                 session = NULL;
 913         } else {
 914                 rfolder->session = NULL;
 915                 log_warning(LOG_PROTOCOL, _("IMAP4 connection to %s has been"
 916                             " disconnected. Reconnecting...\n"),
 917                             folder->account->recv_server);
 918                 statusbar_print_all(_("IMAP4 connection to %s has been"
 919                             " disconnected. Reconnecting...\n"),
 920                             folder->account->recv_server);
 921                 SESSION(session)->state = SESSION_DISCONNECTED;
 922                 SESSION(session)->sock = NULL;
 923                 session_destroy(SESSION(session));
 924                 /* Clear folders session to make imap_session_get create
 925                    a new session, because of rfolder->session == NULL
 926                    it will not try to reconnect again and so avoid an
 927                    endless loop */
 928                 debug_print("getting session...\n");
 929                 session = imap_session_get(folder);
 930                 rfolder->session = SESSION(session);
 931                 statusbar_pop_all();
 932         }
 933         return session;
 934 }
 935
 936 static IMAPSession *imap_session_get(Folder *folder)
 937 {
 938         RemoteFolder *rfolder = REMOTE_FOLDER(folder);
 939         IMAPSession *session = NULL;
 940         gint r = MAILIMAP_NO_ERROR;
 941
 942         g_return_val_if_fail(folder != NULL, NULL);
 943         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, NULL);
 944         g_return_val_if_fail(folder->account != NULL, NULL);
 945
 946         if (prefs_common.work_offline &&
 947             !inc_offline_should_override(FALSE,
 948                 _("Claws Mail needs network access in order "
 949                   "to access the IMAP server."))) {
 950                 return NULL;
 951         }
 952
 953         /* Make sure we have a session */
 954         if (rfolder->session != NULL && rfolder->session->state != SESSION_DISCONNECTED) {
 955                 session = IMAP_SESSION(rfolder->session);
 956         } else if (rfolder->session != NULL && rfolder->session->state == SESSION_DISCONNECTED) {
 957                 session_destroy(SESSION(rfolder->session));
 958                 rfolder->session = NULL;
 959                 goto new_conn;
 960         } else if (rfolder->connecting) {
 961                 debug_print("already connecting\n");
 962                 return NULL;
 963         } else {
 964 new_conn:
 965                 imap_reset_uid_lists(folder);
 966                 if (time(NULL) - rfolder->last_failure <= 2)
 967                         return NULL;
 968                 rfolder->connecting = TRUE;
 969                 session = imap_session_new(folder, folder->account);
 970         }
 971         if(session == NULL) {
 972                 rfolder->last_failure = time(NULL);
 973                 rfolder->connecting = FALSE;
 974                 return NULL;
 975         }
 976
 977         /* Make sure session is authenticated */
 978         if (!IMAP_SESSION(session)->authenticated)
 979                 r = imap_session_authenticate(IMAP_SESSION(session), folder->account);
 980
 981         if (r != MAILIMAP_NO_ERROR || (!is_fatal(r) && !IMAP_SESSION(session)->authenticated)) {
 982                 rfolder->session = NULL;
 983                 if (!is_fatal(r)) {
 984                         imap_threaded_disconnect(session->folder);
 985                         SESSION(session)->state = SESSION_DISCONNECTED;
 986                         SESSION(session)->sock = NULL;
 987                         session_destroy(SESSION(session));
 988                 }
 989                 rfolder->last_failure = time(NULL);
 990                 rfolder->connecting = FALSE;
 991                 return NULL;
 992         }
 993
 994         /* I think the point of this code is to avoid sending a
 995          * keepalive if we've used the session recently and therefore
 996          * think it's still alive.  Unfortunately, most of the code
 997          * does not yet check for errors on the socket, and so if the
 998          * connection drops we don't notice until the timeout expires.
 999          * A better solution than sending a NOOP every time would be
1000          * for every command to be prepared to retry until it is
1001          * successfully sent. -- mbp */
1002         if ((time(NULL) - SESSION(session)->last_access_time > SESSION_TIMEOUT_INTERVAL) || session->cancelled) {
1003                 /* verify that the session is still alive */
1004                 if ((r = imap_cmd_noop(session)) != MAILIMAP_NO_ERROR) {
1005                         debug_print("disconnected!\n");
1006                         if (!is_fatal(r))
1007                                 session = imap_reconnect_if_possible(folder, session);
1008                         else {
1009                                 rfolder->session = NULL;
1010                                 rfolder->connecting = FALSE;
1011                                 session = imap_session_get(folder);
1012                         }
1013                 }
1014                 if (session)
1015                         session->cancelled = FALSE;
1016         }
1017
1018         rfolder->session = SESSION(session);
1019         rfolder->connecting = FALSE;
1020
1021         return IMAP_SESSION(session);
1022 }
1023
1024 static IMAPSession *imap_session_new(Folder * folder,
1025                                      const PrefsAccount *account)
1026 {
1027         IMAPSession *session;
1028         gushort port;
1029         int r;
1030         int authenticated = FALSE;
1031
1032 #if (defined(USE_OPENSSL) || defined (USE_GNUTLS))
1033         /* FIXME: IMAP over SSL only... */
1034         SSLType ssl_type;
1035
1036         port = account->set_imapport ? account->imapport
1037                 : account->ssl_imap == SSL_TUNNEL ? IMAPS_PORT : IMAP4_PORT;
1038         ssl_type = account->ssl_imap;
1039 #else
1040         if (account->ssl_imap != SSL_NONE) {
1041                 if (alertpanel_full(_("Insecure connection"),
1042                         _("This connection is configured to be secured "
1043                           "using SSL, but SSL is not available in this "
1044                           "build of Claws Mail. \n\n"
1045                           "Do you want to continue connecting to this "
1046                           "server? The communication would not be "
1047                           "secure."),
1048                           GTK_STOCK_CANCEL, _("Con_tinue connecting"),
1049                           NULL, FALSE, NULL, ALERT_WARNING,
1050                           G_ALERTDEFAULT) != G_ALERTALTERNATE)
1051                         return NULL;
1052         }
1053         port = account->set_imapport ? account->imapport
1054                 : IMAP4_PORT;
1055 #endif
1056
1057         imap_init(folder);
1058         statuswindow_print_all(_("Connecting to IMAP4 server: %s..."), folder->account->recv_server);
1059 #ifndef G_OS_WIN32
1060         if (account->set_tunnelcmd) {
1061                 r = imap_threaded_connect_cmd(folder,
1062                                               account->tunnelcmd,
1063                                               account->recv_server,
1064                                               port);
1065         }
1066         else
1067 #endif
1068         {
1069 #if (defined(USE_OPENSSL) || defined (USE_GNUTLS))
1070                 if (ssl_type == SSL_TUNNEL) {
1071                         r = imap_threaded_connect_ssl(folder,
1072                                                       account->recv_server,
1073                                                       port);
1074                 }
1075                 else
1076 #endif
1077                 {
1078                         r = imap_threaded_connect(folder,
1079                                                   account->recv_server,
1080                                                   port);
1081                 }
1082         }
1083
1084         statuswindow_pop_all();
1085         if (r == MAILIMAP_NO_ERROR_AUTHENTICATED) {
1086                 authenticated = TRUE;
1087         }
1088         else if (r == MAILIMAP_NO_ERROR_NON_AUTHENTICATED) {
1089                 authenticated = FALSE;
1090         }
1091         else {
1092 #if (defined(USE_OPENSSL) || defined (USE_GNUTLS))
1093                 if (r == MAILIMAP_ERROR_SSL)
1094                         log_error(LOG_PROTOCOL, _("SSL handshake failed\n"));
1095                 else
1096 #endif
1097                         imap_handle_error(NULL, r);
1098
1099                 if(!prefs_common.no_recv_err_panel) {
1100                         alertpanel_error_log(_("Can't connect to IMAP4 server: %s:%d"),
1101                                          account->recv_server, port);
1102                 } else {
1103                         log_error(LOG_PROTOCOL, _("Can't connect to IMAP4 server: %s:%d\n"),
1104                                          account->recv_server, port);
1105                 }
1106
1107                 return NULL;
1108         }
1109
1110         session = g_new0(IMAPSession, 1);
1111         session_init(SESSION(session), account, FALSE);
1112         SESSION(session)->type             = SESSION_IMAP;
1113         SESSION(session)->server           = g_strdup(account->recv_server);
1114         SESSION(session)->port             = port;
1115         SESSION(session)->sock             = NULL;
1116
1117         SESSION(session)->destroy          = imap_session_destroy;
1118
1119         session->capability = NULL;
1120
1121         session->authenticated = authenticated;
1122         session->mbox = NULL;
1123         session->exists = 0;
1124         session->recent = 0;
1125         session->expunge = 0;
1126         session->cmd_count = 0;
1127         session->folder = folder;
1128         IMAP_FOLDER(session->folder)->last_seen_separator = 0;
1129
1130 #if (defined(USE_OPENSSL) || defined (USE_GNUTLS))
1131         if (account->ssl_imap == SSL_STARTTLS) {
1132                 gint ok;
1133
1134                 ok = imap_cmd_starttls(session);
1135                 if (ok != MAILIMAP_NO_ERROR) {
1136                         log_warning(LOG_PROTOCOL, _("Can't start TLS session.\n"));
1137                         if (!is_fatal(ok)) {
1138                                 SESSION(session)->sock = NULL;
1139                                 session_destroy(SESSION(session));
1140                         }
1141                         return NULL;
1142                 }
1143
1144                 imap_free_capabilities(session);
1145                 session->authenticated = FALSE;
1146                 session->uidplus = FALSE;
1147                 session->cmd_count = 1;
1148         }
1149 #endif
1150         log_message(LOG_PROTOCOL, "IMAP connection is %s-authenticated\n",
1151                     (session->authenticated) ? "pre" : "un");
1152
1153         return session;
1154 }
1155
1156 static gint imap_session_authenticate(IMAPSession *session,
1157                                       PrefsAccount *account)
1158 {
1159         gchar *pass, *acc_pass;
1160         gboolean failed = FALSE;
1161         gint ok = MAILIMAP_NO_ERROR;
1162         g_return_val_if_fail(account->userid != NULL, MAILIMAP_ERROR_BAD_STATE);
1163         acc_pass = account->passwd;
1164 try_again:
1165         pass = acc_pass;
1166         if (!pass && account->imap_auth_type != IMAP_AUTH_ANON) {
1167                 gchar *tmp_pass;
1168                 tmp_pass = input_dialog_query_password_keep(account->recv_server,
1169                                                             account->userid,
1170                                                             &(account->session_passwd));
1171                 if (!tmp_pass)
1172                         return MAILIMAP_NO_ERROR;
1173                 Xstrdup_a(pass, tmp_pass, {g_free(tmp_pass); return MAILIMAP_NO_ERROR;});
1174                 g_free(tmp_pass);
1175         } else if (account->imap_auth_type == IMAP_AUTH_ANON) {
1176                 pass = "";
1177         }
1178         statuswindow_print_all(_("Connecting to IMAP4 server %s...\n"),
1179                                 account->recv_server);
1180         if ((ok = imap_auth(session, account->userid, pass, account->imap_auth_type)) != MAILIMAP_NO_ERROR) {
1181                 statusbar_pop_all();
1182
1183                 if (!failed && !is_fatal(ok)) {
1184                         acc_pass = NULL;
1185                         failed = TRUE;
1186                         if (account->session_passwd != NULL) {
1187                                 g_free(account->session_passwd);
1188                                 account->session_passwd = NULL;
1189                         }
1190                         goto try_again;
1191                 } else {
1192                         if (prefs_common.no_recv_err_panel) {
1193                                 log_error(LOG_PROTOCOL, _("Couldn't login to IMAP server %s.\n"), account->recv_server);
1194                                 mainwindow_show_error();
1195                         } else
1196                                 alertpanel_error_log(_("Couldn't login to IMAP server %s."), account->recv_server);
1197                 }
1198
1199                 return ok;
1200         }
1201
1202         statuswindow_pop_all();
1203         session->authenticated = TRUE;
1204         return MAILIMAP_NO_ERROR;
1205 }
1206
1207 static void imap_session_destroy(Session *session)
1208 {
1209         if (session->state != SESSION_DISCONNECTED)
1210                 imap_threaded_disconnect(IMAP_SESSION(session)->folder);
1211
1212         imap_free_capabilities(IMAP_SESSION(session));
1213         g_free(IMAP_SESSION(session)->mbox);
1214 }
1215
1216 static gchar *imap_fetch_msg(Folder *folder, FolderItem *item, gint uid)
1217 {
1218         return imap_fetch_msg_full(folder, item, uid, TRUE, TRUE);
1219 }
1220
1221 static guint get_file_size_with_crs(const gchar *filename)
1222 {
1223         FILE *fp = NULL;
1224         guint cnt = 0;
1225         gchar buf[4096];
1226
1227         if (filename == NULL)
1228                 return -1;
1229
1230         fp = g_fopen(filename, "rb");
1231         if (!fp)
1232                 return -1;
1233
1234         while (fgets(buf, sizeof (buf), fp) != NULL) {
1235                 cnt += strlen(buf);
1236                 if (!strstr(buf, "\r\n") && strstr(buf, "\n"))
1237                         cnt++;
1238         }
1239
1240         fclose(fp);
1241         return cnt;
1242 }
1243
1244 static void imap_remove_cached_msg(Folder *folder, FolderItem *item, MsgInfo *msginfo)
1245 {
1246         gchar *path, *filename;
1247
1248         path = folder_item_get_path(item);
1249
1250         if (!is_dir_exist(path)) {
1251                 g_free(path);
1252                 return;
1253         }
1254
1255         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(msginfo->msgnum), NULL);
1256         g_free(path);
1257
1258         if (is_file_exist(filename)) {
1259                 claws_unlink(filename);
1260         }
1261         g_free(filename);
1262 }
1263
1264 typedef struct _TagsData {
1265         gchar *str;
1266         GSList *msglist;
1267         IMAPFolderItem *item;
1268 } TagsData;
1269
1270 static void imap_commit_tags(FolderItem *item, MsgInfo *msginfo, GSList *tags_set, GSList *tags_unset)
1271 {
1272         IMAPSession *session;
1273         gint ok, can_create_tags;
1274         Folder *folder = NULL;
1275         TagsData *ht_data = NULL;
1276         GSList *cur;
1277
1278         g_return_if_fail(item != NULL);
1279         g_return_if_fail(msginfo != NULL);
1280
1281         folder = item->folder;
1282         debug_print("getting session...\n");
1283         session = imap_session_get(folder);
1284
1285         if (!session) {
1286                 debug_print("can't get session\n");
1287                 return;
1288         }
1289
1290         ok = imap_select(session, IMAP_FOLDER(folder), item,
1291                          NULL, NULL, NULL, NULL, &can_create_tags, FALSE);
1292
1293         if (ok != MAILIMAP_NO_ERROR) {
1294                 return;
1295         }
1296
1297
1298         if (IMAP_FOLDER_ITEM(item)->can_create_flags != ITEM_CAN_CREATE_FLAGS)
1299                 return;
1300
1301         if (IMAP_FOLDER_ITEM(item)->batching) {
1302                 /* instead of performing an UID STORE command for each message change,
1303                  * as a lot of them can change "together", we just fill in hashtables
1304                  * and defer the treatment so that we're able to send only one
1305                  * command.
1306                  */
1307                 debug_print("IMAP batch mode on, deferring tags change\n");
1308                 for (cur = tags_set; cur; cur = cur->next) {
1309                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1310                         if (cur_tag) {
1311                                 ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->tags_set_table,
1312                                         GINT_TO_POINTER(cur_tag));
1313                                 if (ht_data == NULL) {
1314                                         ht_data = g_new0(TagsData, 1);
1315                                         ht_data->str = g_strdup(tags_get_tag(cur_tag));
1316                                         ht_data->item = IMAP_FOLDER_ITEM(item);
1317                                         g_hash_table_insert(IMAP_FOLDER_ITEM(item)->tags_set_table,
1318                                                 GINT_TO_POINTER(cur_tag), ht_data);
1319                                 }
1320                                 ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
1321                         }
1322                 }
1323                 for (cur = tags_unset; cur; cur = cur->next) {
1324                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1325                         if (cur_tag) {
1326                                 ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->tags_unset_table,
1327                                         GINT_TO_POINTER(cur_tag));
1328                                 if (ht_data == NULL) {
1329                                         ht_data = g_new0(TagsData, 1);
1330                                         ht_data->str = g_strdup(tags_get_tag(cur_tag));
1331                                         ht_data->item = IMAP_FOLDER_ITEM(item);
1332                                         g_hash_table_insert(IMAP_FOLDER_ITEM(item)->tags_unset_table,
1333                                                 GINT_TO_POINTER(cur_tag), ht_data);
1334                                 }
1335                                 ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
1336                         }
1337                 }
1338         } else {
1339                 GSList *list_set = NULL;
1340                 GSList *list_unset = NULL;
1341                 GSList numlist;
1342
1343                 numlist.data = GINT_TO_POINTER(msginfo->msgnum);
1344                 numlist.next = NULL;
1345
1346                 debug_print("IMAP changing tags NOW\n");
1347                 for (cur = tags_set; cur; cur = cur->next) {
1348                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1349                         const gchar *str = tags_get_tag(cur_tag);
1350                         if (strcmp(str, "$Forwarded") && strcmp(str, "Junk") && strcmp(str, "NonJunk") && strcmp(str, "NotJunk") && strcmp(str, "NoJunk") && strcmp(str, "Junk") )
1351                                 list_set = g_slist_prepend(list_set, g_strdup(str));
1352                 }
1353                 if (list_set) {
1354                         ok = imap_set_message_flags(session,
1355                                 IMAP_FOLDER_ITEM(item), &numlist, 0, list_set, TRUE);
1356                         slist_free_strings(list_set);
1357                         g_slist_free(list_set);
1358                         if (ok != MAILIMAP_NO_ERROR) {
1359                                 return;
1360                         }
1361                 }
1362
1363                 for (cur = tags_unset; cur; cur = cur->next) {
1364                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1365                         const gchar *str = tags_get_tag(cur_tag);
1366                         if (strcmp(str, "$Forwarded") && strcmp(str, "Junk") && strcmp(str, "NonJunk") && strcmp(str, "NotJunk") && strcmp(str, "NoJunk") && strcmp(str, "Junk") )
1367                                 list_unset = g_slist_prepend(list_unset, g_strdup(str));
1368                 }
1369                 if (list_unset) {
1370                         ok = imap_set_message_flags(session,
1371                                 IMAP_FOLDER_ITEM(item), &numlist, 0, list_unset, FALSE);
1372                         slist_free_strings(list_unset);
1373                         g_slist_free(list_unset);
1374                         if (ok != MAILIMAP_NO_ERROR) {
1375                                 return;
1376                         }
1377                 }
1378         }
1379 }
1380
1381 static gchar *imap_fetch_msg_full(Folder *folder, FolderItem *item, gint uid,
1382                                   gboolean headers, gboolean body)
1383 {
1384         gchar *path, *filename;
1385         IMAPSession *session;
1386         gint ok;
1387
1388         g_return_val_if_fail(folder != NULL, NULL);
1389         g_return_val_if_fail(item != NULL, NULL);
1390
1391         if (uid == 0)
1392                 return NULL;
1393
1394         path = folder_item_get_path(item);
1395         if (!is_dir_exist(path))
1396                 make_dir_hier(path);
1397         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(uid), NULL);
1398         g_free(path);
1399         debug_print("trying to fetch cached %s\n", filename);
1400         if (is_file_exist(filename)) {
1401                 /* see whether the local file represents the whole message
1402                  * or not. As the IMAP server reports size with \r chars,
1403                  * we have to update the local file (UNIX \n only) size */
1404                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1405                 guint have_size = -1;
1406
1407                 if (cached)
1408                         debug_print("message %d has been already %scached.\n", uid,
1409                                 MSG_IS_FULLY_CACHED(cached->flags) ? "fully ":"");
1410
1411                 if (!cached || !MSG_IS_FULLY_CACHED(cached->flags)) {
1412                         have_size = get_file_size_with_crs(filename);
1413                         if (cached && (cached->size <= have_size || !body)) {
1414                                 procmsg_msginfo_free(cached);
1415                                 ok = file_strip_crs(filename);
1416                                 if (ok == 0 && cached && cached->size <= have_size) {
1417                                         /* we have it all and stripped */
1418                                         debug_print("...fully cached in fact; setting flag.\n");
1419                                         procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1420                                 }
1421                                 return filename;
1422                         } else if (!cached && time(NULL) - get_file_mtime(filename) < 60) {
1423                                 debug_print("message not cached and file recent, considering file complete\n");
1424                                 ok = file_strip_crs(filename);
1425                                 if (ok == 0)
1426                                         return filename;
1427                         } else {
1428                                 procmsg_msginfo_free(cached);
1429                         }
1430                 }
1431                 if (cached && MSG_IS_FULLY_CACHED(cached->flags)) {
1432                         procmsg_msginfo_free(cached);
1433                         return filename;
1434                 }
1435         } else {
1436                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1437                 if (cached) {
1438                         procmsg_msginfo_unset_flags(cached, MSG_FULLY_CACHED, 0);
1439                         procmsg_msginfo_free(cached);
1440                 }
1441         }
1442
1443         debug_print("getting session...\n");
1444         session = imap_session_get(folder);
1445
1446         if (!session) {
1447                 g_free(filename);
1448                 return NULL;
1449         }
1450         session_set_access_time(SESSION(session));
1451         lock_session(session); /* unlocked later in the function */
1452
1453         debug_print("IMAP fetching messages\n");
1454         ok = imap_select(session, IMAP_FOLDER(folder), item,
1455                          NULL, NULL, NULL, NULL, NULL, FALSE);
1456         if (ok != MAILIMAP_NO_ERROR) {
1457                 g_warning("can't select mailbox %s\n", item->path);
1458                 g_free(filename);
1459                 return NULL;
1460         }
1461
1462         session_set_access_time(SESSION(session));
1463
1464         debug_print("getting message %d...\n", uid);
1465         ok = imap_cmd_fetch(session, (guint32)uid, filename, headers, body);
1466
1467         if (ok != MAILIMAP_NO_ERROR) {
1468                 g_warning("can't fetch message %d\n", uid);
1469                 g_free(filename);
1470                 return NULL;
1471         }
1472
1473         session_set_access_time(SESSION(session));
1474         unlock_session(session);
1475
1476         ok = file_strip_crs(filename);
1477
1478         if (ok == 0 && headers && body) {
1479                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1480                 if (cached) {
1481                         procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1482                         procmsg_msginfo_free(cached);
1483                 }
1484         } else if (ok == -1) {
1485                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1486                 if (cached) {
1487                         procmsg_msginfo_unset_flags(cached, MSG_FULLY_CACHED, 0);
1488                         procmsg_msginfo_free(cached);
1489                 }
1490         }
1491         return filename;
1492 }
1493
1494 static gboolean imap_is_msg_fully_cached(Folder *folder, FolderItem *item, gint uid)
1495 {
1496         gchar *path, *filename;
1497         guint size = 0;
1498         MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1499
1500         if (!cached)
1501                 return FALSE;
1502
1503         if (MSG_IS_FULLY_CACHED(cached->flags)) {
1504                 procmsg_msginfo_free(cached);
1505                 return TRUE;
1506         }
1507         path = folder_item_get_path(item);
1508         if (!is_dir_exist(path))
1509                 return FALSE;
1510
1511         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(uid), NULL);
1512         g_free(path);
1513         if (is_file_exist(filename)) {
1514                 if (cached && cached->total_size == cached->size) {
1515                         /* fast path */
1516                         g_free(filename);
1517                         procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1518                         return TRUE;
1519                 }
1520                 size = get_file_size_with_crs(filename);
1521                 g_free(filename);
1522         }
1523         if (cached && size >= cached->size) {
1524                 cached->total_size = cached->size;
1525                 procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1526                 procmsg_msginfo_free(cached);
1527                 return TRUE;
1528         }
1529         if (cached)
1530                 procmsg_msginfo_free(cached);
1531         return FALSE;
1532 }
1533
1534 void imap_cache_msg(FolderItem *item, gint msgnum)
1535 {
1536         Folder *folder = NULL;
1537
1538         if (!item)
1539                 return;
1540         folder = item->folder;
1541
1542         if (!imap_is_msg_fully_cached(folder, item, msgnum)) {
1543                 gchar *tmp = imap_fetch_msg_full(folder, item, msgnum, TRUE, TRUE);
1544                 debug_print("fetched %s\n", tmp);
1545                 g_free(tmp);
1546         }
1547 }
1548
1549 static gint imap_add_msg(Folder *folder, FolderItem *dest,
1550                          const gchar *file, MsgFlags *flags)
1551 {
1552         gint ret;
1553         GSList file_list;
1554         MsgFileInfo fileinfo;
1555
1556         g_return_val_if_fail(file != NULL, -1);
1557
1558         fileinfo.msginfo = NULL;
1559         fileinfo.file = (gchar *)file;
1560         fileinfo.flags = flags;
1561         file_list.data = &fileinfo;
1562         file_list.next = NULL;
1563
1564         ret = imap_add_msgs(folder, dest, &file_list, NULL);
1565         return ret;
1566 }
1567
1568 static gint imap_add_msgs(Folder *folder, FolderItem *dest, GSList *file_list,
1569                    GRelation *relation)
1570 {
1571         gchar *destdir;
1572         IMAPSession *session;
1573         guint32 last_uid = 0;
1574         GSList *cur;
1575         MsgFileInfo *fileinfo;
1576         gint ok = MAILIMAP_NO_ERROR;
1577         gint curnum = 0, total = 0;
1578         gboolean missing_uids = FALSE;
1579
1580         g_return_val_if_fail(folder != NULL, -1);
1581         g_return_val_if_fail(dest != NULL, -1);
1582         g_return_val_if_fail(file_list != NULL, -1);
1583
1584         debug_print("getting session...\n");
1585         session = imap_session_get(folder);
1586         if (!session) {
1587                 return -1;
1588         }
1589         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
1590         if (is_fatal(ok))
1591                 return -1;
1592         statusbar_print_all(_("Adding messages..."));
1593         total = g_slist_length(file_list);
1594         for (cur = file_list; cur != NULL; cur = cur->next) {
1595                 IMAPFlags iflags = 0;
1596                 guint32 new_uid = 0;
1597                 gchar *real_file = NULL;
1598                 fileinfo = (MsgFileInfo *)cur->data;
1599
1600                 statusbar_progress_all(curnum, total, total < 10 ? 1:10);
1601                 curnum++;
1602
1603                 if (fileinfo->flags) {
1604                         if (MSG_IS_MARKED(*fileinfo->flags))
1605                                 iflags |= IMAP_FLAG_FLAGGED;
1606                         if (MSG_IS_REPLIED(*fileinfo->flags))
1607                                 iflags |= IMAP_FLAG_ANSWERED;
1608                         if (MSG_IS_FORWARDED(*fileinfo->flags))
1609                                 iflags |= IMAP_FLAG_FORWARDED;
1610                         if (MSG_IS_SPAM(*fileinfo->flags))
1611                                 iflags |= IMAP_FLAG_SPAM;
1612                         else
1613                                 iflags |= IMAP_FLAG_HAM;
1614                         if (!MSG_IS_UNREAD(*fileinfo->flags))
1615                                 iflags |= IMAP_FLAG_SEEN;
1616
1617                 }
1618
1619                 if (real_file == NULL)
1620                         real_file = g_strdup(fileinfo->file);
1621
1622                 if (folder_has_parent_of_type(dest, F_QUEUE) ||
1623                     folder_has_parent_of_type(dest, F_OUTBOX) ||
1624                     folder_has_parent_of_type(dest, F_DRAFT) ||
1625                     folder_has_parent_of_type(dest, F_TRASH))
1626                         iflags |= IMAP_FLAG_SEEN;
1627
1628                 ok = imap_cmd_append(session, IMAP_FOLDER_ITEM(dest), destdir, real_file, iflags,
1629                                      &new_uid);
1630
1631                 if (ok != MAILIMAP_NO_ERROR) {
1632                         g_warning("can't append message %s\n", real_file);
1633                         g_free(real_file);
1634                         g_free(destdir);
1635                         statusbar_progress_all(0,0,0);
1636                         statusbar_pop_all();
1637                         return -1;
1638                 } else {
1639                         debug_print("appended new message as %d\n", new_uid);
1640                         /* put the local file in the imapcache, so that we don't
1641                          * have to fetch it back later. */
1642
1643                         if (new_uid == 0) {
1644                                 missing_uids = TRUE;
1645                                 debug_print("Missing UID (0)\n");
1646                         }
1647                         if (new_uid > 0) {
1648                                 gchar *cache_path = folder_item_get_path(dest);
1649                                 if (!is_dir_exist(cache_path))
1650                                         make_dir_hier(cache_path);
1651                                 if (is_dir_exist(cache_path)) {
1652                                         gchar *cache_file = g_strconcat(
1653                                                 cache_path, G_DIR_SEPARATOR_S,
1654                                                 itos(new_uid), NULL);
1655                                         copy_file(real_file, cache_file, TRUE);
1656                                         debug_print("got UID %d, copied to cache: %s\n", new_uid, cache_file);
1657                                         g_free(cache_file);
1658                                 }
1659                                 g_free(cache_path);
1660                         }
1661                 }
1662
1663                 if (relation != NULL)
1664                         g_relation_insert(relation, fileinfo->msginfo != NULL ?
1665                                           (gpointer) fileinfo->msginfo : (gpointer) fileinfo,
1666                                           GINT_TO_POINTER(new_uid));
1667                 if (last_uid < new_uid) {
1668                         last_uid = new_uid;
1669                 }
1670
1671                 g_free(real_file);
1672         }
1673
1674         statusbar_progress_all(0,0,0);
1675         statusbar_pop_all();
1676
1677
1678         g_free(destdir);
1679
1680         imap_scan_required(folder, dest);
1681
1682         session = imap_session_get(folder);
1683         if (!session) {
1684                 return -1;
1685         }
1686         if (missing_uids) {
1687                 gint a;
1688                 ok = imap_select(session, IMAP_FOLDER(folder), dest,
1689                          &a, NULL, NULL, NULL, NULL, FALSE);
1690         }
1691         return last_uid;
1692 }
1693
1694 static GSList *flatten_mailimap_set(struct mailimap_set * set)
1695 {
1696         GSList *result = NULL;
1697         clistiter *list;
1698         int start, end, t;
1699         GSList *cur;
1700
1701         for (list = clist_begin(set->set_list); list; list = clist_next(list)) {
1702                 struct mailimap_set_item *item = (struct mailimap_set_item *)clist_content(list);
1703                 start = item->set_first;
1704                 end = item->set_last;
1705                 for (t = start; t <= end; t++) {
1706                         result = g_slist_prepend(result, GINT_TO_POINTER(t));
1707                 }
1708         }
1709         result = g_slist_reverse(result);
1710         if (debug_get_mode()) {
1711                 debug_print("flat imap set: ");
1712                 for (cur = result; cur; cur = cur->next) {
1713                         debug_print("%d ", GPOINTER_TO_INT(cur->data));
1714                 }
1715                 debug_print("\n");
1716         }
1717
1718         return result;
1719 }
1720 static gint imap_do_copy_msgs(Folder *folder, FolderItem *dest,
1721                               MsgInfoList *msglist, GRelation *relation)
1722 {
1723         FolderItem *src;
1724         gchar *destdir;
1725         GSList *seq_list, *cur;
1726         MsgInfo *msginfo;
1727         IMAPSession *session;
1728         gint ok = MAILIMAP_NO_ERROR;
1729         GRelation *uid_mapping;
1730         gint last_num = 0;
1731         gboolean single = FALSE;
1732
1733         g_return_val_if_fail(folder != NULL, -1);
1734         g_return_val_if_fail(dest != NULL, -1);
1735         g_return_val_if_fail(msglist != NULL, -1);
1736
1737         debug_print("getting session...\n");
1738         session = imap_session_get(folder);
1739
1740         if (!session) {
1741                 return -1;
1742         }
1743
1744         msginfo = (MsgInfo *)msglist->data;
1745         if (msglist->next == NULL)
1746                 single = TRUE;
1747         src = msginfo->folder;
1748         if (src == dest) {
1749                 g_warning("the src folder is identical to the dest.\n");
1750                 return -1;
1751         }
1752
1753         if (src->folder != dest->folder) {
1754                 GSList *infolist = NULL, *cur;
1755                 int res = -1;
1756                 for (cur = msglist; cur; cur = cur->next) {
1757                         msginfo = (MsgInfo *)cur->data;
1758                         MsgFileInfo *fileinfo = g_new0(MsgFileInfo, 1);
1759                         fileinfo->file = procmsg_get_message_file(msginfo);
1760                         fileinfo->flags = &(msginfo->flags);
1761                         infolist = g_slist_prepend(infolist, fileinfo);
1762                 }
1763                 infolist = g_slist_reverse(infolist);
1764                 res = folder_item_add_msgs(dest, infolist, FALSE);
1765                 for (cur = infolist; cur; cur = cur->next) {
1766                         MsgFileInfo *info = (MsgFileInfo *)cur->data;
1767                         g_free(info->file);
1768                         g_free(info);
1769                 }
1770                 g_slist_free(infolist);
1771                 return res;
1772         }
1773
1774         lock_session(session); /* unlocked later in the function */
1775
1776         ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
1777                          NULL, NULL, NULL, NULL, NULL, FALSE);
1778         if (ok != MAILIMAP_NO_ERROR) {
1779                 return ok;
1780         }
1781
1782         unlock_session(session);
1783
1784         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
1785
1786         if (is_fatal(ok))
1787                 return ok;
1788
1789         seq_list = imap_get_lep_set_from_msglist(IMAP_FOLDER(folder), msglist);
1790         uid_mapping = g_relation_new(2);
1791         g_relation_index(uid_mapping, 0, g_direct_hash, g_direct_equal);
1792
1793         statusbar_print_all(_("Copying messages..."));
1794         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
1795                 struct mailimap_set * seq_set;
1796                 struct mailimap_set * source = NULL;
1797                 struct mailimap_set * dest = NULL;
1798                 seq_set = cur->data;
1799
1800                 debug_print("Copying messages from %s to %s ...\n",
1801                             src->path, destdir);
1802
1803                 lock_session(session); /* unlocked later in the function */
1804                 ok = imap_cmd_copy(session, seq_set, destdir, uid_mapping,
1805                         &source, &dest);
1806
1807                 if (is_fatal(ok)) {
1808                         session = NULL;
1809                 }
1810
1811                 if (ok == MAILIMAP_NO_ERROR) {
1812                         unlock_session(session);
1813                         if (relation && source && dest) {
1814                                 GSList *s_list = flatten_mailimap_set(source);
1815                                 GSList *d_list = flatten_mailimap_set(dest);
1816                                 GSList *s_cur, *d_cur;
1817                                 if (g_slist_length(s_list) == g_slist_length(d_list)) {
1818
1819                                         for (s_cur = s_list, d_cur = d_list;
1820                                              s_cur && d_cur;
1821                                              s_cur = s_cur->next, d_cur = d_cur->next) {
1822                                                 g_relation_insert(uid_mapping, s_cur->data, d_cur->data);
1823                                         }
1824
1825                                 } else {
1826                                         debug_print("hhhmm, source list length != dest list length.\n");
1827                                 }
1828                                 g_slist_free(s_list);
1829                                 g_slist_free(d_list);
1830                         }
1831                 }
1832
1833
1834                 if (source)
1835                         mailimap_set_free(source);
1836                 if (dest)
1837                         mailimap_set_free(dest);
1838
1839                 if (ok != MAILIMAP_NO_ERROR) {
1840                         g_relation_destroy(uid_mapping);
1841                         imap_lep_set_free(seq_list);
1842                         statusbar_pop_all();
1843                         return -1;
1844                 }
1845         }
1846
1847         for (cur = msglist; cur != NULL; cur = g_slist_next(cur)) {
1848                 MsgInfo *msginfo = (MsgInfo *)cur->data;
1849                 GTuples *tuples;
1850
1851                 tuples = g_relation_select(uid_mapping,
1852                                            GINT_TO_POINTER(msginfo->msgnum),
1853                                            0);
1854                 if (tuples->len > 0) {
1855                         gint num = GPOINTER_TO_INT(g_tuples_index(tuples, 0, 1));
1856                         g_relation_insert(relation, msginfo,
1857                                           GINT_TO_POINTER(num));
1858                         if (num > last_num)
1859                                 last_num = num;
1860                         debug_print("copied message %d as %d\n", msginfo->msgnum, num);
1861                         /* put the local file in the imapcache, so that we don't
1862                          * have to fetch it back later. */
1863                         if (num > 0) {
1864                                 gchar *cache_path = folder_item_get_path(msginfo->folder);
1865                                 gchar *real_file = g_strconcat(
1866                                         cache_path, G_DIR_SEPARATOR_S,
1867                                         itos(msginfo->msgnum), NULL);
1868                                 gchar *cache_file = NULL;
1869                                 g_free(cache_path);
1870                                 cache_path = folder_item_get_path(dest);
1871                                 cache_file = g_strconcat(
1872                                         cache_path, G_DIR_SEPARATOR_S,
1873                                         itos(num), NULL);
1874                                 if (!is_dir_exist(cache_path))
1875                                         make_dir_hier(cache_path);
1876                                 if (is_file_exist(real_file) && is_dir_exist(cache_path)) {
1877                                         copy_file(real_file, cache_file, TRUE);
1878                                         debug_print("copied to cache: %s\n", cache_file);
1879                                 }
1880                                 g_free(real_file);
1881                                 g_free(cache_file);
1882                                 g_free(cache_path);
1883                         }
1884                 } else
1885                         g_relation_insert(relation, msginfo,
1886                                           GINT_TO_POINTER(0));
1887                 g_tuples_destroy(tuples);
1888         }
1889         statusbar_pop_all();
1890
1891         g_relation_destroy(uid_mapping);
1892         imap_lep_set_free(seq_list);
1893
1894         g_free(destdir);
1895
1896         IMAP_FOLDER_ITEM(dest)->lastuid = 0;
1897         IMAP_FOLDER_ITEM(dest)->uid_next = 0;
1898         g_slist_free(IMAP_FOLDER_ITEM(dest)->uid_list);
1899         IMAP_FOLDER_ITEM(dest)->uid_list = NULL;
1900
1901         imap_scan_required(folder, dest);
1902         if (ok == MAILIMAP_NO_ERROR)
1903                 return last_num;
1904         else
1905                 return -1;
1906 }
1907
1908 static gint imap_copy_msg(Folder *folder, FolderItem *dest, MsgInfo *msginfo)
1909 {
1910         GSList msglist;
1911
1912         g_return_val_if_fail(msginfo != NULL, -1);
1913
1914         msglist.data = msginfo;
1915         msglist.next = NULL;
1916
1917         return imap_copy_msgs(folder, dest, &msglist, NULL);
1918 }
1919
1920 static gint imap_copy_msgs(Folder *folder, FolderItem *dest,
1921                     MsgInfoList *msglist, GRelation *relation)
1922 {
1923         MsgInfo *msginfo;
1924         gint ret;
1925
1926         g_return_val_if_fail(folder != NULL, -1);
1927         g_return_val_if_fail(dest != NULL, -1);
1928         g_return_val_if_fail(msglist != NULL, -1);
1929
1930         msginfo = (MsgInfo *)msglist->data;
1931         g_return_val_if_fail(msginfo->folder != NULL, -1);
1932
1933         ret = imap_do_copy_msgs(folder, dest, msglist, relation);
1934         return ret;
1935 }
1936
1937
1938 static gint imap_do_remove_msgs(Folder *folder, FolderItem *dest,
1939                                 MsgInfoList *msglist, GRelation *relation)
1940 {
1941         gchar *destdir, *dir;
1942         GSList *numlist = NULL, *cur;
1943         MsgInfo *msginfo;
1944         IMAPSession *session;
1945         gint ok = MAILIMAP_NO_ERROR;
1946         GRelation *uid_mapping;
1947
1948         g_return_val_if_fail(folder != NULL, -1);
1949         g_return_val_if_fail(dest != NULL, -1);
1950         g_return_val_if_fail(msglist != NULL, -1);
1951
1952         debug_print("getting session...\n");
1953         session = imap_session_get(folder);
1954         if (!session) {
1955                 return -1;
1956         }
1957
1958         lock_session(session); /* unlocked later in the function */
1959
1960         msginfo = (MsgInfo *)msglist->data;
1961
1962         ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
1963                          NULL, NULL, NULL, NULL, NULL, FALSE);
1964         if (ok != MAILIMAP_NO_ERROR) {
1965                 return ok;
1966         }
1967
1968         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
1969         if (is_fatal(ok))
1970                 return ok;
1971         for (cur = msglist; cur; cur = cur->next) {
1972                 msginfo = (MsgInfo *)cur->data;
1973                 if (!MSG_IS_DELETED(msginfo->flags))
1974                         numlist = g_slist_prepend(numlist, GINT_TO_POINTER(msginfo->msgnum));
1975         }
1976         numlist = g_slist_reverse(numlist);
1977
1978         uid_mapping = g_relation_new(2);
1979         g_relation_index(uid_mapping, 0, g_direct_hash, g_direct_equal);
1980
1981         if (numlist != NULL) {
1982                 ok = imap_set_message_flags
1983                         (session, IMAP_FOLDER_ITEM(msginfo->folder), numlist, IMAP_FLAG_DELETED, NULL, TRUE);
1984                 if (ok != MAILIMAP_NO_ERROR) {
1985                         log_warning(LOG_PROTOCOL, _("can't set deleted flags\n"));
1986                         return ok;
1987                 }
1988         } /* else we just need to expunge */
1989         ok = imap_cmd_expunge(session);
1990         if (ok != MAILIMAP_NO_ERROR) {
1991                 log_warning(LOG_PROTOCOL, _("can't expunge\n"));
1992                 return ok;
1993         }
1994
1995         session->folder_content_changed = TRUE;
1996         unlock_session(session);
1997
1998         dir = folder_item_get_path(msginfo->folder);
1999         if (is_dir_exist(dir)) {
2000                 for (cur = msglist; cur; cur = cur->next) {
2001                         msginfo = (MsgInfo *)cur->data;
2002                         remove_numbered_files(dir, msginfo->msgnum, msginfo->msgnum);
2003                 }
2004         }
2005         g_free(dir);
2006
2007         g_relation_destroy(uid_mapping);
2008         g_slist_free(numlist);
2009
2010         imap_scan_required(folder, dest);
2011
2012         g_free(destdir);
2013         if (ok == MAILIMAP_NO_ERROR)
2014                 return 0;
2015         else
2016                 return -1;
2017 }
2018
2019 static gint imap_remove_msgs(Folder *folder, FolderItem *dest,
2020                     MsgInfoList *msglist, GRelation *relation)
2021 {
2022         MsgInfo *msginfo;
2023
2024         g_return_val_if_fail(folder != NULL, -1);
2025         g_return_val_if_fail(dest != NULL, -1);
2026         if (msglist == NULL)
2027                 return 0;
2028
2029         msginfo = (MsgInfo *)msglist->data;
2030         g_return_val_if_fail(msginfo->folder != NULL, -1);
2031
2032         return imap_do_remove_msgs(folder, dest, msglist, relation);
2033 }
2034
2035 static gint imap_remove_all_msg(Folder *folder, FolderItem *item)
2036 {
2037         GSList *list = folder_item_get_msg_list(item);
2038         gint res = imap_remove_msgs(folder, item, list, NULL);
2039         procmsg_msg_list_free(list);
2040         return res;
2041 }
2042
2043 static gboolean imap_is_msg_changed(Folder *folder, FolderItem *item,
2044                                     MsgInfo *msginfo)
2045 {
2046         /* TODO: properly implement this method */
2047         return FALSE;
2048 }
2049
2050 static gint imap_close(Folder *folder, FolderItem *item)
2051 {
2052         return 0;
2053 }
2054
2055 static gint imap_scan_tree_real(Folder *folder, gboolean subs_only)
2056 {
2057         FolderItem *item = NULL;
2058         IMAPSession *session;
2059         gchar *root_folder = NULL;
2060
2061         g_return_val_if_fail(folder != NULL, -1);
2062         g_return_val_if_fail(folder->account != NULL, -1);
2063
2064         debug_print("getting session...\n");
2065         session = imap_session_get(folder);
2066         if (!session) {
2067                 if (!folder->node) {
2068                         folder_tree_destroy(folder);
2069                         item = folder_item_new(folder, folder->name, NULL);
2070                         item->folder = folder;
2071                         folder->node = item->node = g_node_new(item);
2072                 }
2073                 return -1;
2074         }
2075
2076         if (folder->account->imap_dir && *folder->account->imap_dir) {
2077                 gchar *real_path;
2078                 int r;
2079                 clist * lep_list;
2080
2081                 Xstrdup_a(root_folder, folder->account->imap_dir, {return -1;});
2082                 extract_quote(root_folder, '"');
2083                 subst_char(root_folder,
2084                            imap_get_path_separator(session, IMAP_FOLDER(folder),
2085                                                    root_folder, &r),
2086                            '/');
2087                 if (is_fatal(r))
2088                         return -1;
2089                 strtailchomp(root_folder, '/');
2090                 real_path = imap_get_real_path
2091                         (session, IMAP_FOLDER(folder), root_folder, &r);
2092                 if (is_fatal(r))
2093                         return -1;
2094                 debug_print("IMAP root directory: %s\n", real_path);
2095
2096                 /* check if root directory exist */
2097
2098                 r = imap_threaded_list(session->folder, "", real_path,
2099                                        &lep_list);
2100
2101                 if (r != MAILIMAP_NO_ERROR)
2102                         imap_handle_error(SESSION(session), r);
2103
2104                 if ((r != MAILIMAP_NO_ERROR) || (clist_count(lep_list) == 0)) {
2105                         if (!folder->node) {
2106                                 item = folder_item_new(folder, folder->name, NULL);
2107                                 item->folder = folder;
2108                                 folder->node = item->node = g_node_new(item);
2109                         }
2110                         return -1;
2111                 }
2112                 mailimap_list_result_free(lep_list);
2113
2114                 g_free(real_path);
2115         }
2116
2117         if (folder->node)
2118                 item = FOLDER_ITEM(folder->node->data);
2119
2120         if (item && !item->path && root_folder) {
2121                 item->path = g_strdup(root_folder);
2122         }
2123
2124         if (!item || ((item->path || root_folder) &&
2125                       strcmp2(item->path, root_folder) != 0)) {
2126                 folder_tree_destroy(folder);
2127                 item = folder_item_new(folder, folder->name, root_folder);
2128                 item->folder = folder;
2129                 folder->node = item->node = g_node_new(item);
2130         }
2131
2132         imap_scan_tree_recursive(session, FOLDER_ITEM(folder->node->data), subs_only);
2133         imap_create_missing_folders(folder);
2134
2135         return 0;
2136 }
2137
2138 static gint imap_scan_tree(Folder *folder)
2139 {
2140         gboolean subs_only = FALSE;
2141         if (folder->account) {
2142                 debug_print(" scanning only subs %d\n", folder->account->imap_subsonly);
2143                 subs_only = folder->account->imap_subsonly;
2144         }
2145         return imap_scan_tree_real(folder, subs_only);
2146 }
2147
2148 static gint imap_scan_tree_recursive(IMAPSession *session, FolderItem *item, gboolean subs_only)
2149 {
2150         Folder *folder;
2151         IMAPFolder *imapfolder;
2152         FolderItem *new_item;
2153         GSList *item_list, *cur;
2154         GNode *node;
2155         gchar *real_path;
2156         gchar *wildcard_path;
2157         gchar separator;
2158         gchar wildcard[3];
2159         clist * lep_list;
2160         int r;
2161
2162         g_return_val_if_fail(item != NULL, -1);
2163         g_return_val_if_fail(item->folder != NULL, -1);
2164         g_return_val_if_fail(item->no_sub == FALSE, -1);
2165
2166         folder = item->folder;
2167         imapfolder = IMAP_FOLDER(folder);
2168
2169         separator = imap_get_path_separator(session, imapfolder, item->path, &r);
2170         if (is_fatal(r))
2171                 return r;
2172
2173         if (folder->ui_func)
2174                 folder->ui_func(folder, item, folder->ui_func_data);
2175
2176         if (item->path) {
2177                 wildcard[0] = separator;
2178                 wildcard[1] = '%';
2179                 wildcard[2] = '\0';
2180                 real_path = imap_get_real_path(session, imapfolder, item->path, &r);
2181                 if (is_fatal(r))
2182                         return r;
2183         } else {
2184                 wildcard[0] = '%';
2185                 wildcard[1] = '\0';
2186                 real_path = g_strdup("");
2187         }
2188
2189         Xstrcat_a(wildcard_path, real_path, wildcard,
2190                   {g_free(real_path); return MAILIMAP_ERROR_BAD_STATE;});
2191         lep_list = NULL;
2192
2193         if (subs_only)
2194                 r = imap_threaded_lsub(folder, "", wildcard_path, &lep_list);
2195         else
2196                 r = imap_threaded_list(folder, "", wildcard_path, &lep_list);
2197
2198         if (r != MAILIMAP_NO_ERROR) {
2199                 imap_handle_error(SESSION(session), r);
2200                 item_list = NULL;
2201                 return r;
2202         }
2203         else {
2204                 item_list = imap_list_from_lep(imapfolder,
2205                                                lep_list, real_path, FALSE);
2206                 mailimap_list_result_free(lep_list);
2207         }
2208
2209         g_free(real_path);
2210
2211         node = item->node->children;
2212         while (node != NULL) {
2213                 FolderItem *old_item = FOLDER_ITEM(node->data);
2214                 GNode *next = node->next;
2215
2216                 new_item = NULL;
2217                 for (cur = item_list; cur != NULL; cur = cur->next) {
2218                         FolderItem *cur_item = FOLDER_ITEM(cur->data);
2219                         if (!strcmp2(old_item->path, cur_item->path)) {
2220                                 new_item = cur_item;
2221                                 break;
2222                         }
2223                 }
2224                 if (!new_item) {
2225                         if (old_item && old_item->path && !strcmp(old_item->path, "INBOX")) {
2226                                 debug_print("not removing INBOX\n");
2227                         } else {
2228                                 debug_print("folder '%s' not found. removing...\n",
2229                                             old_item->path);
2230                                 folder_item_remove(old_item);
2231                         }
2232                 } else {
2233                         old_item->no_sub = new_item->no_sub;
2234                         old_item->no_select = new_item->no_select;
2235                         if (old_item->no_sub == TRUE && node->children) {
2236                                 debug_print("folder '%s' doesn't have "
2237                                             "subfolders. removing...\n",
2238                                             old_item->path);
2239                                 folder_item_remove_children(old_item);
2240                         }
2241                 }
2242
2243                 node = next;
2244         }
2245
2246         for (cur = item_list; cur != NULL; cur = cur->next) {
2247                 FolderItem *cur_item = FOLDER_ITEM(cur->data);
2248                 new_item = NULL;
2249
2250                 for (node = item->node->children; node != NULL;
2251                      node = node->next) {
2252                         if (!strcmp2(FOLDER_ITEM(node->data)->path,
2253                                      cur_item->path)) {
2254                                 new_item = FOLDER_ITEM(node->data);
2255                                 folder_item_destroy(cur_item);
2256                                 cur_item = NULL;
2257                                 break;
2258                         }
2259                 }
2260                 if (!new_item) {
2261                         new_item = cur_item;
2262                         debug_print("new folder '%s' found.\n", new_item->path);
2263                         folder_item_append(item, new_item);
2264                 }
2265
2266                 if (!strcmp(new_item->path, "INBOX")) {
2267                         new_item->stype = F_INBOX;
2268                         folder->inbox = new_item;
2269                 } else if (!folder_item_parent(item) || item->stype == F_INBOX) {
2270                         gchar *base;
2271
2272                         base = g_path_get_basename(new_item->path);
2273
2274                         if (!folder->outbox && !g_ascii_strcasecmp(base, "Sent")) {
2275                                 new_item->stype = F_OUTBOX;
2276                                 folder->outbox = new_item;
2277                         } else if (!folder->draft && !g_ascii_strcasecmp(base, "Drafts")) {
2278                                 new_item->stype = F_DRAFT;
2279                                 folder->draft = new_item;
2280                         } else if (!folder->queue && !g_ascii_strcasecmp(base, "Queue")) {
2281                                 new_item->stype = F_QUEUE;
2282                                 folder->queue = new_item;
2283                         } else if (!folder->trash && !g_ascii_strcasecmp(base, "Trash")) {
2284                                 new_item->stype = F_TRASH;
2285                                 folder->trash = new_item;
2286                         }
2287                         g_free(base);
2288                 }
2289
2290                 if (new_item->no_sub == FALSE)
2291                         imap_scan_tree_recursive(session, new_item, subs_only);
2292         }
2293
2294         g_slist_free(item_list);
2295
2296         return MAILIMAP_NO_ERROR;
2297 }
2298
2299 GList *imap_scan_subtree(Folder *folder, FolderItem *item, gboolean unsubs_only, gboolean recursive)
2300 {
2301         IMAPSession *session = imap_session_get(folder);
2302         gchar *real_path;
2303         gchar *wildcard_path;
2304         gchar separator;
2305         gchar wildcard[3];
2306         clist * lep_list;
2307         GSList *item_list = NULL, *cur;
2308         GList *child_list = NULL, *tmplist = NULL;
2309         GSList *sub_list = NULL;
2310         int r;
2311
2312         if (!session)
2313                 return NULL;
2314
2315         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &r);
2316         if (is_fatal(r))
2317                 return NULL;
2318
2319         if (item->path) {
2320                 wildcard[0] = separator;
2321                 wildcard[1] = '%';
2322                 wildcard[2] = '\0';
2323                 real_path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &r);
2324                 if (is_fatal(r))
2325                         return NULL;
2326         } else {
2327                 wildcard[0] = '%';
2328                 wildcard[1] = '\0';
2329                 real_path = g_strdup("");
2330         }
2331
2332         Xstrcat_a(wildcard_path, real_path, wildcard,
2333                   {g_free(real_path); return NULL;});
2334         lep_list = NULL;
2335
2336         if (unsubs_only)
2337                 statusbar_print_all(_("Looking for unsubscribed folders in %s..."),
2338                                 item->path?item->path:item->name);
2339         else
2340                 statusbar_print_all(_("Looking for subfolders of %s..."),
2341                                 item->path?item->path:item->name);
2342
2343         r = imap_threaded_list(folder, "", wildcard_path, &lep_list);
2344         if (r) {
2345                 statusbar_pop_all();
2346                 return NULL;
2347         }
2348         item_list = imap_list_from_lep(IMAP_FOLDER(folder),
2349                                lep_list, real_path, FALSE);
2350         mailimap_list_result_free(lep_list);
2351
2352         for (cur = item_list; cur != NULL; cur = cur->next) {
2353                 FolderItem *cur_item = FOLDER_ITEM(cur->data);
2354                 if (recursive) {
2355                         tmplist = imap_scan_subtree(folder, cur_item,
2356                                         unsubs_only, recursive);
2357                         if (tmplist)
2358                                 child_list = g_list_concat(child_list, tmplist);
2359                 }
2360                 child_list = g_list_prepend(child_list,
2361                                 imap_get_real_path(session,
2362                                         IMAP_FOLDER(folder), cur_item->path, &r));
2363                 if (is_fatal(r)) {
2364                         statusbar_pop_all();
2365                         return NULL;
2366                 }
2367                 folder_item_destroy(cur_item);
2368         }
2369         child_list = g_list_reverse(child_list);
2370         g_slist_free(item_list);
2371
2372         if (unsubs_only) {
2373                 r = imap_threaded_lsub(folder, "", wildcard_path, &lep_list);
2374                 if (r) {
2375                         statusbar_pop_all();
2376                         return NULL;
2377                 }
2378                 sub_list = imap_list_from_lep(IMAP_FOLDER(folder),
2379                                        lep_list, real_path, FALSE);
2380                 mailimap_list_result_free(lep_list);
2381
2382                 for (cur = sub_list; cur != NULL; cur = cur->next) {
2383                         FolderItem *cur_item = FOLDER_ITEM(cur->data);
2384                         GList *oldlitem = NULL;
2385                         gchar *tmp = imap_get_real_path(session,
2386                                         IMAP_FOLDER(folder), cur_item->path, &r);
2387                         if (r) {
2388                                 statusbar_pop_all();
2389                                 return NULL;
2390                         }
2391                         folder_item_destroy(cur_item);
2392                         oldlitem = g_list_find_custom(
2393                                         child_list, tmp, (GCompareFunc)strcmp2);
2394                         if (oldlitem) {
2395                                 child_list = g_list_remove_link(child_list, oldlitem);
2396                                 g_free(oldlitem->data);
2397                                 g_list_free(oldlitem);
2398                         }
2399                         g_free(tmp);
2400                 }
2401         }
2402
2403         statusbar_pop_all();
2404
2405         return child_list;
2406 }
2407
2408 static gint imap_create_tree(Folder *folder)
2409 {
2410         g_return_val_if_fail(folder != NULL, -1);
2411         g_return_val_if_fail(folder->node != NULL, -1);
2412         g_return_val_if_fail(folder->node->data != NULL, -1);
2413         g_return_val_if_fail(folder->account != NULL, -1);
2414
2415         imap_scan_tree(folder);
2416         imap_create_missing_folders(folder);
2417
2418         return 0;
2419 }
2420
2421 static void imap_create_missing_folders(Folder *folder)
2422 {
2423         g_return_if_fail(folder != NULL);
2424
2425         if (!folder->inbox)
2426                 folder->inbox = imap_create_special_folder
2427                         (folder, F_INBOX, "INBOX");
2428         if (!folder->trash)
2429                 folder->trash = imap_create_special_folder
2430                         (folder, F_TRASH, "Trash");
2431         if (!folder->queue)
2432                 folder->queue = imap_create_special_folder
2433                         (folder, F_QUEUE, "Queue");
2434         if (!folder->outbox)
2435                 folder->outbox = imap_create_special_folder
2436                         (folder, F_OUTBOX, "Sent");
2437         if (!folder->draft)
2438                 folder->draft = imap_create_special_folder
2439                         (folder, F_DRAFT, "Drafts");
2440 }
2441
2442 static FolderItem *imap_create_special_folder(Folder *folder,
2443                                               SpecialFolderItemType stype,
2444                                               const gchar *name)
2445 {
2446         FolderItem *item;
2447         FolderItem *new_item;
2448
2449         g_return_val_if_fail(folder != NULL, NULL);
2450         g_return_val_if_fail(folder->node != NULL, NULL);
2451         g_return_val_if_fail(folder->node->data != NULL, NULL);
2452         g_return_val_if_fail(folder->account != NULL, NULL);
2453         g_return_val_if_fail(name != NULL, NULL);
2454
2455         item = FOLDER_ITEM(folder->node->data);
2456         new_item = imap_create_folder(folder, item, name);
2457
2458         if (!new_item) {
2459                 g_warning("Can't create '%s'\n", name);
2460                 if (!folder->inbox) return NULL;
2461
2462                 new_item = imap_create_folder(folder, folder->inbox, name);
2463                 if (!new_item)
2464                         g_warning("Can't create '%s' under INBOX\n", name);
2465                 else
2466                         new_item->stype = stype;
2467         } else
2468                 new_item->stype = stype;
2469
2470         return new_item;
2471 }
2472
2473 static gchar *imap_folder_get_path(Folder *folder)
2474 {
2475         gchar *folder_path;
2476
2477         g_return_val_if_fail(folder != NULL, NULL);
2478         g_return_val_if_fail(folder->account != NULL, NULL);
2479
2480         folder_path = g_strconcat(get_imap_cache_dir(),
2481                                   G_DIR_SEPARATOR_S,
2482                                   folder->account->recv_server,
2483                                   G_DIR_SEPARATOR_S,
2484                                   folder->account->userid,
2485                                   NULL);
2486
2487         return folder_path;
2488 }
2489
2490 static gchar *imap_item_get_path(Folder *folder, FolderItem *item)
2491 {
2492         gchar *folder_path, *path;
2493
2494         g_return_val_if_fail(folder != NULL, NULL);
2495         g_return_val_if_fail(item != NULL, NULL);
2496         folder_path = imap_folder_get_path(folder);
2497
2498         g_return_val_if_fail(folder_path != NULL, NULL);
2499         if (g_path_is_absolute(folder_path)) {
2500                 if (item->path)
2501                         path = g_strconcat(folder_path, G_DIR_SEPARATOR_S,
2502                                            item->path, NULL);
2503                 else
2504                         path = g_strdup(folder_path);
2505         } else {
2506                 if (item->path)
2507                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
2508                                            folder_path, G_DIR_SEPARATOR_S,
2509                                            item->path, NULL);
2510                 else
2511                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
2512                                            folder_path, NULL);
2513         }
2514         g_free(folder_path);
2515 #ifdef G_OS_WIN32
2516         while (strchr(path, '/'))
2517                 *strchr(path, '/') = '\\';
2518 #endif
2519
2520         return path;
2521 }
2522
2523 static FolderItem *imap_create_folder(Folder *folder, FolderItem *parent,
2524                                const gchar *name)
2525 {
2526         gchar *dirpath, *imap_path;
2527         IMAPSession *session;
2528         FolderItem *new_item;
2529         gchar separator;
2530         gchar *new_name;
2531         const gchar *p;
2532         gint ok;
2533         gboolean no_select = FALSE, no_sub = FALSE;
2534         gboolean exist = FALSE;
2535
2536         g_return_val_if_fail(folder != NULL, NULL);
2537         g_return_val_if_fail(folder->account != NULL, NULL);
2538         g_return_val_if_fail(parent != NULL, NULL);
2539         g_return_val_if_fail(name != NULL, NULL);
2540
2541         debug_print("getting session...\n");
2542         session = imap_session_get(folder);
2543         if (!session) {
2544                 return NULL;
2545         }
2546
2547         if (!folder_item_parent(parent) && strcmp(name, "INBOX") == 0) {
2548                 dirpath = g_strdup(name);
2549         }else if (parent->path)
2550                 dirpath = g_strconcat(parent->path, "/", name, NULL);
2551         else if ((p = strchr(name, '/')) != NULL && *(p + 1) != '\0')
2552                 dirpath = g_strdup(name);
2553         else if (folder->account->imap_dir && *folder->account->imap_dir) {
2554                 gchar *imap_dir;
2555
2556                 Xstrdup_a(imap_dir, folder->account->imap_dir, {return NULL;});
2557                 strtailchomp(imap_dir, '/');
2558                 dirpath = g_strconcat(imap_dir, "/", name, NULL);
2559         } else
2560                 dirpath = g_strdup(name);
2561
2562
2563
2564         /* keep trailing directory separator to create a folder that contains
2565            sub folder */
2566         imap_path = imap_utf8_to_modified_utf7(dirpath, FALSE);
2567
2568         strtailchomp(dirpath, '/');
2569         Xstrdup_a(new_name, name, {
2570                 g_free(dirpath);
2571                 return NULL;});
2572
2573         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), imap_path, &ok);
2574         if (is_fatal(ok))
2575                 return NULL;
2576         imap_path_separator_subst(imap_path, separator);
2577         /* remove trailing / for display */
2578         strtailchomp(new_name, '/');
2579
2580         if (strcmp(dirpath, "INBOX") != 0) {
2581                 GPtrArray *argbuf;
2582                 int r;
2583                 clist * lep_list;
2584
2585                 argbuf = g_ptr_array_new();
2586                 r = imap_threaded_list(folder, "", imap_path, &lep_list);
2587                 if (r != MAILIMAP_NO_ERROR) {
2588                         imap_handle_error(SESSION(session), r);
2589                         log_warning(LOG_PROTOCOL, _("can't create mailbox: LIST failed\n"));
2590                         g_free(imap_path);
2591                         g_free(dirpath);
2592                         ptr_array_free_strings(argbuf);
2593                         g_ptr_array_free(argbuf, TRUE);
2594                         return NULL;
2595                 }
2596
2597                 if (clist_count(lep_list) > 0)
2598                         exist = TRUE;
2599                 mailimap_list_result_free(lep_list);
2600                 lep_list = NULL;
2601                 if (!exist) {
2602                         ok = imap_cmd_create(session, imap_path);
2603                         if (ok != MAILIMAP_NO_ERROR) {
2604                                 log_warning(LOG_PROTOCOL, _("can't create mailbox\n"));
2605                                 g_free(imap_path);
2606                                 g_free(dirpath);
2607                                 return NULL;
2608                         }
2609                         r = imap_threaded_list(folder, "", imap_path, &lep_list);
2610                         if (r == MAILIMAP_NO_ERROR) {
2611                                 GSList *item_list = imap_list_from_lep(IMAP_FOLDER(folder),
2612                                                lep_list, dirpath, TRUE);
2613                                 if (item_list) {
2614                                         FolderItem *cur_item = FOLDER_ITEM(item_list->data);
2615                                         no_select = cur_item->no_select;
2616                                         no_sub = cur_item->no_sub;
2617                                         g_slist_free(item_list);
2618                                 }
2619                                 mailimap_list_result_free(lep_list);
2620                         } else {
2621                                 imap_handle_error(SESSION(session), r);
2622                         }
2623                 }
2624                 imap_threaded_subscribe(folder, imap_path, TRUE);
2625         } else {
2626                 clist *lep_list;
2627                 int r;
2628                 /* just get flags */
2629                 r = imap_threaded_list(folder, "", "INBOX", &lep_list);
2630                 if (r == MAILIMAP_NO_ERROR) {
2631                         GSList *item_list = imap_list_from_lep(IMAP_FOLDER(folder),
2632                                        lep_list, dirpath, TRUE);
2633                         if (item_list) {
2634                                 FolderItem *cur_item = FOLDER_ITEM(item_list->data);
2635                                 no_select = cur_item->no_select;
2636                                 no_sub = cur_item->no_sub;
2637                                 g_slist_free(item_list);
2638                         }
2639                         mailimap_list_result_free(lep_list);
2640                 } else {
2641                         imap_handle_error(SESSION(session), r);
2642                 }
2643         }
2644
2645         new_item = folder_item_new(folder, new_name, dirpath);
2646         new_item->no_select = no_select;
2647         new_item->no_sub = no_sub;
2648         folder_item_append(parent, new_item);
2649         g_free(imap_path);
2650         g_free(dirpath);
2651
2652         dirpath = folder_item_get_path(new_item);
2653         if (!is_dir_exist(dirpath))
2654                 make_dir_hier(dirpath);
2655         g_free(dirpath);
2656
2657         if (exist) {
2658                 /* folder existed, scan it */
2659                 imap_scan_required(folder, new_item);
2660                 folder_item_scan_full(new_item, FALSE);
2661         }
2662
2663         return new_item;
2664 }
2665
2666 static gint imap_rename_folder(Folder *folder, FolderItem *item,
2667                                const gchar *name)
2668 {
2669         gchar *dirpath;
2670         gchar *newpath;
2671         gchar *real_oldpath;
2672         gchar *real_newpath;
2673         gchar *paths[2];
2674         gchar *old_cache_dir;
2675         gchar *new_cache_dir;
2676         IMAPSession *session;
2677         gchar separator;
2678         gint ok;
2679         gint exists, recent, unseen;
2680         guint32 uid_validity;
2681
2682         g_return_val_if_fail(folder != NULL, -1);
2683         g_return_val_if_fail(item != NULL, -1);
2684         g_return_val_if_fail(item->path != NULL, -1);
2685         g_return_val_if_fail(name != NULL, -1);
2686
2687         debug_print("getting session...\n");
2688         session = imap_session_get(folder);
2689         if (!session) {
2690                 return -1;
2691         }
2692
2693         if (strchr(name, imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &ok)) != NULL ||
2694                 is_fatal(ok)) {
2695                 g_warning(_("New folder name must not contain the namespace "
2696                             "path separator"));
2697                 return -1;
2698         }
2699
2700         real_oldpath = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &ok);
2701         if (is_fatal(ok)) {
2702                 return -1;
2703         }
2704
2705         g_free(session->mbox);
2706         session->mbox = NULL;
2707         session->exists = 0;
2708         session->recent = 0;
2709         session->expunge = 0;
2710         ok = imap_cmd_examine(session, "INBOX",
2711                               &exists, &recent, &unseen, &uid_validity, FALSE);
2712         if (ok != MAILIMAP_NO_ERROR) {
2713                 g_free(real_oldpath);
2714                 return -1;
2715         }
2716
2717         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &ok);
2718         if (is_fatal(ok))
2719                 return -1;
2720         if (strchr(item->path, G_DIR_SEPARATOR)) {
2721                 dirpath = g_path_get_dirname(item->path);
2722                 newpath = g_strconcat(dirpath, G_DIR_SEPARATOR_S, name, NULL);
2723                 g_free(dirpath);
2724         } else
2725                 newpath = g_strdup(name);
2726
2727         real_newpath = imap_utf8_to_modified_utf7(newpath, FALSE);
2728         imap_path_separator_subst(real_newpath, separator);
2729
2730         ok = imap_cmd_rename(session, real_oldpath, real_newpath);
2731         if (ok != MAILIMAP_NO_ERROR) {
2732                 log_warning(LOG_PROTOCOL, _("can't rename mailbox: %s to %s\n"),
2733                             real_oldpath, real_newpath);
2734                 g_free(real_oldpath);
2735                 g_free(newpath);
2736                 g_free(real_newpath);
2737                 return -1;
2738         }
2739         g_free(item->name);
2740         item->name = g_strdup(name);
2741
2742         old_cache_dir = folder_item_get_path(item);
2743
2744         paths[0] = g_strdup(item->path);
2745         paths[1] = newpath;
2746         g_node_traverse(item->node, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
2747                         imap_rename_folder_func, paths);
2748
2749         if (is_dir_exist(old_cache_dir)) {
2750                 new_cache_dir = folder_item_get_path(item);
2751                 if (rename(old_cache_dir, new_cache_dir) < 0) {
2752                         FILE_OP_ERROR(old_cache_dir, "rename");
2753                 }
2754                 g_free(new_cache_dir);
2755         }
2756
2757         g_free(old_cache_dir);
2758         g_free(paths[0]);
2759         g_free(newpath);
2760         g_free(real_oldpath);
2761         g_free(real_newpath);
2762         return 0;
2763 }
2764
2765 gint imap_subscribe(Folder *folder, FolderItem *item, gchar *rpath, gboolean sub)
2766 {
2767         gchar *path;
2768         gint r = -1;
2769         IMAPSession *session;
2770         debug_print("getting session...\n");
2771
2772         session = imap_session_get(folder);
2773         if (!session) {
2774                 return -1;
2775         }
2776         if (item && item->path) {
2777                 path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &r);
2778                 if (!path || is_fatal(r))
2779                         return -1;
2780                 if (!strcmp(path, "INBOX") && sub == FALSE)
2781                         return -1;
2782                 debug_print("%ssubscribing %s\n", sub?"":"un", path);
2783                 r = imap_threaded_subscribe(folder, path, sub);
2784                 g_free(path);
2785         } else if (rpath) {
2786                 r = imap_threaded_subscribe(folder, rpath, sub);
2787         } else
2788                 return -1;
2789         return r;
2790 }
2791
2792 static gint imap_remove_folder_real(Folder *folder, FolderItem *item)
2793 {
2794         gint ok;
2795         IMAPSession *session;
2796         gchar *path;
2797         gchar *cache_dir;
2798         gboolean selected_folder;
2799
2800         g_return_val_if_fail(folder != NULL, -1);
2801         g_return_val_if_fail(item != NULL, -1);
2802         g_return_val_if_fail(item->path != NULL, -1);
2803
2804         debug_print("getting session...\n");
2805         session = imap_session_get(folder);
2806         if (!session) {
2807                 return -1;
2808         }
2809         path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &ok);
2810         if (is_fatal(ok))
2811                 return -1;
2812
2813         imap_threaded_subscribe(folder, path, FALSE);
2814
2815         selected_folder = (session->mbox != NULL) &&
2816                           (!strcmp(session->mbox, item->path));
2817         if (selected_folder) {
2818                 ok = imap_cmd_close(session);
2819                 if (ok != MAILIMAP_NO_ERROR) {
2820                         debug_print("close err %d\n", ok);
2821                         return ok;
2822                 }
2823         }
2824         ok = imap_cmd_delete(session, path);
2825         if (ok != MAILIMAP_NO_ERROR && !is_fatal(ok)) {
2826                 gchar *tmp = g_strdup_printf("%s%c", path,
2827                                 imap_get_path_separator(session, IMAP_FOLDER(folder), path, &ok));
2828                 g_free(path);
2829                 path = tmp;
2830                 if (!is_fatal(ok))
2831                         ok = imap_cmd_delete(session, path);
2832         }
2833
2834         if (ok != MAILIMAP_NO_ERROR) {
2835                 log_warning(LOG_PROTOCOL, _("can't delete mailbox\n"));
2836                 g_free(path);
2837                 return -1;
2838         }
2839
2840         g_free(path);
2841         cache_dir = folder_item_get_path(item);
2842         if (is_dir_exist(cache_dir) && remove_dir_recursive(cache_dir) < 0)
2843                 g_warning("can't remove directory '%s'\n", cache_dir);
2844         g_free(cache_dir);
2845         folder_item_remove(item);
2846         return 0;
2847 }
2848
2849 static gint imap_remove_folder(Folder *folder, FolderItem *item)
2850 {
2851         GNode *node, *next;
2852
2853         g_return_val_if_fail(item != NULL, -1);
2854         g_return_val_if_fail(item->folder != NULL, -1);
2855         g_return_val_if_fail(item->node != NULL, -1);
2856
2857         node = item->node->children;
2858         while (node != NULL) {
2859                 next = node->next;
2860                 if (imap_remove_folder(folder, FOLDER_ITEM(node->data)) < 0)
2861                         return -1;
2862                 node = next;
2863         }
2864         debug_print("IMAP removing %s\n", item->path);
2865
2866         if (imap_remove_all_msg(folder, item) < 0)
2867                 return -1;
2868         return imap_remove_folder_real(folder, item);
2869 }
2870
2871 typedef struct _uncached_data {
2872         IMAPSession *session;
2873         FolderItem *item;
2874         MsgNumberList *numlist;
2875         guint cur;
2876         guint total;
2877         gboolean done;
2878         int ok;
2879 } uncached_data;
2880
2881 static void *imap_get_uncached_messages_thread(void *data)
2882 {
2883         uncached_data *stuff = (uncached_data *)data;
2884         IMAPSession *session = stuff->session;
2885         FolderItem *item = stuff->item;
2886         MsgNumberList *numlist = stuff->numlist;
2887         GSList *newlist = NULL;
2888         GSList *llast = NULL;
2889         GSList *seq_list, *cur;
2890         gboolean got_alien_tags = FALSE;
2891
2892         debug_print("uncached_messages\n");
2893
2894         if (session == NULL || item == NULL || item->folder == NULL
2895             || FOLDER_CLASS(item->folder) != &imap_class) {
2896                 stuff->done = TRUE;
2897                 return NULL;
2898         }
2899
2900         seq_list = imap_get_lep_set_from_numlist(IMAP_FOLDER(item->folder), numlist);
2901         debug_print("get msgs info\n");
2902         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
2903                 struct mailimap_set * imapset;
2904                 unsigned int i;
2905                 int r;
2906                 carray * env_list;
2907                 int count;
2908
2909                 if (session->cancelled)
2910                         break;
2911
2912                 imapset = cur->data;
2913
2914                 r = imap_threaded_fetch_env(session->folder,
2915                                             imapset, &env_list);
2916                 if (r != MAILIMAP_NO_ERROR) {
2917                         imap_handle_error(SESSION(session), r);
2918                         if (is_fatal(r)) {
2919                                 stuff->ok = r;
2920                                 return NULL;
2921                         }
2922                         continue;
2923                 }
2924
2925                 session_set_access_time(SESSION(session));
2926
2927                 count = 0;
2928                 for(i = 0 ; i < carray_count(env_list) ; i += 2) {
2929                         struct imap_fetch_env_info * info;
2930                         MsgInfo * msginfo;
2931                         GSList *tags = NULL, *cur = NULL;
2932                         info = carray_get(env_list, i);
2933                         tags = carray_get(env_list, i+1);
2934                         msginfo = imap_envelope_from_lep(info, item);
2935                         if (msginfo == NULL) {
2936                                 slist_free_strings(tags);
2937                                 g_slist_free(tags);
2938                                 continue;
2939                         }
2940                         if (tags != NULL) {
2941                                 g_slist_free(msginfo->tags);
2942                                 msginfo->tags = NULL;
2943                         }
2944                         for (cur = tags; cur; cur = cur->next) {
2945                                 gchar *real_tag = imap_modified_utf7_to_utf8(cur->data, TRUE);
2946                                 gint id = 0;
2947                                 id = tags_get_id_for_str(real_tag);
2948                                 if (id == -1) {
2949                                         id = tags_add_tag(real_tag);
2950                                         got_alien_tags = TRUE;
2951                                 }
2952                                 if (!g_slist_find(msginfo->tags, GINT_TO_POINTER(id))) {
2953                                         msginfo->tags = g_slist_append(
2954                                                         msginfo->tags,
2955                                                         GINT_TO_POINTER(id));
2956                                 }
2957                                 g_free(real_tag);
2958                         }
2959                         slist_free_strings(tags);
2960                         g_slist_free(tags);
2961                         msginfo->folder = item;
2962                         if (!newlist)
2963                                 llast = newlist = g_slist_append(newlist, msginfo);
2964                         else {
2965                                 llast = g_slist_append(llast, msginfo);
2966                                 llast = llast->next;
2967                         }
2968                         count ++;
2969                 }
2970
2971                 imap_fetch_env_free(env_list);
2972         }
2973
2974         if (got_alien_tags) {
2975                 tags_write_tags();
2976                 main_window_reflect_tags_changes(mainwindow_get_mainwindow());
2977         }
2978
2979         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
2980                 struct mailimap_set * imapset;
2981
2982                 imapset = cur->data;
2983                 mailimap_set_free(imapset);
2984         }
2985
2986         session_set_access_time(SESSION(session));
2987         stuff->done = TRUE;
2988         return newlist;
2989 }
2990
2991 #define MAX_MSG_NUM 50
2992
2993 static GSList *imap_get_uncached_messages(IMAPSession *session,
2994                                         FolderItem *item,
2995                                         MsgNumberList *numlist,
2996                                         int *r)
2997 {
2998         GSList *result = NULL;
2999         GSList * cur;
3000         uncached_data *data = g_new0(uncached_data, 1);
3001         int finished;
3002
3003         finished = 0;
3004         cur = numlist;
3005         data->total = g_slist_length(numlist);
3006         data->ok = MAILIMAP_NO_ERROR;
3007         debug_print("messages list : %i\n", data->total);
3008
3009         while (cur != NULL) {
3010                 GSList * partial_result;
3011                 int count;
3012                 GSList * newlist;
3013                 GSList * llast;
3014
3015                 llast = NULL;
3016                 count = 0;
3017                 newlist = NULL;
3018                 while (count < MAX_MSG_NUM) {
3019                         void * p;
3020
3021                         p = cur->data;
3022
3023                         if (newlist == NULL)
3024                                 llast = newlist = g_slist_append(newlist, p);
3025                         else {
3026                                 llast = g_slist_append(llast, p);
3027                                 llast = llast->next;
3028                         }
3029                         count ++;
3030
3031                         cur = cur->next;
3032                         if (cur == NULL)
3033                                 break;
3034                 }
3035
3036                 data->done = FALSE;
3037                 data->session = session;
3038                 data->item = item;
3039                 data->numlist = newlist;
3040                 data->cur += count;
3041
3042                 if (prefs_common.work_offline &&
3043                     !inc_offline_should_override(FALSE,
3044                         _("Claws Mail needs network access in order "
3045                           "to access the IMAP server."))) {
3046                         g_free(data);
3047                         return NULL;
3048                 }
3049
3050                 partial_result =
3051                         (GSList *)imap_get_uncached_messages_thread(data);
3052                 *r = data->ok;
3053                 if (data->ok != MAILIMAP_NO_ERROR) {
3054                         goto bail;
3055                 }
3056                 statusbar_progress_all(data->cur,data->total, 1);
3057
3058                 g_slist_free(newlist);
3059
3060                 result = g_slist_concat(result, partial_result);
3061         }
3062 bail:
3063         g_free(data);
3064
3065         statusbar_progress_all(0,0,0);
3066         statusbar_pop_all();
3067
3068         return result;
3069 }
3070
3071 static void imap_delete_all_cached_messages(FolderItem *item)
3072 {
3073         gchar *dir;
3074
3075         g_return_if_fail(item != NULL);
3076         g_return_if_fail(item->folder != NULL);
3077         g_return_if_fail(FOLDER_CLASS(item->folder) == &imap_class);
3078
3079         debug_print("Deleting all cached messages...\n");
3080
3081         dir = folder_item_get_path(item);
3082         if (is_dir_exist(dir))
3083                 remove_all_numbered_files(dir);
3084         g_free(dir);
3085
3086         debug_print("done.\n");
3087 }
3088
3089 gchar imap_get_path_separator_for_item(FolderItem *item)
3090 {
3091         Folder *folder = NULL;
3092         IMAPFolder *imap_folder = NULL;
3093         IMAPSession *session = NULL;
3094         gchar result = '/';
3095         gint ok;
3096         if (!item)
3097                 return '/';
3098         folder = item->folder;
3099
3100         if (!folder)
3101                 return '/';
3102
3103         imap_folder = IMAP_FOLDER(folder);
3104
3105         if (!imap_folder)
3106                 return '/';
3107
3108         debug_print("getting session...");
3109         session = imap_session_get(FOLDER(folder));
3110         result = imap_get_path_separator(session, imap_folder, item->path, &ok);
3111         return result;
3112 }
3113
3114 static gchar imap_refresh_path_separator(IMAPSession *session, IMAPFolder *folder, const gchar *subfolder, gint *ok)
3115 {
3116         clist * lep_list;
3117         int r;
3118         gchar separator = '\0';
3119
3120         g_return_val_if_fail(session != NULL, '/');
3121         r = imap_threaded_list((Folder *)folder, "", subfolder, &lep_list);
3122
3123         if (r != MAILIMAP_NO_ERROR) {
3124                 imap_handle_error(SESSION(session), r);
3125                 log_warning(LOG_PROTOCOL, _("LIST failed\n"));
3126                 *ok = r;
3127                 return '\0';
3128         }
3129
3130         if (clist_count(lep_list) > 0) {
3131                 clistiter * iter = clist_begin(lep_list);
3132                 struct mailimap_mailbox_list * mb;
3133                 mb = clist_content(iter);
3134
3135                 separator = mb->mb_delimiter;
3136                 debug_print("got separator: %c\n", folder->last_seen_separator);
3137         }
3138         *ok = MAILIMAP_NO_ERROR;
3139         mailimap_list_result_free(lep_list);
3140         return separator;
3141 }
3142
3143 static gchar imap_get_path_separator(IMAPSession *session, IMAPFolder *folder, const gchar *path, gint *ok)
3144 {
3145         gchar separator = '/';
3146
3147         if (folder->last_seen_separator == 0) {
3148                 folder->last_seen_separator = imap_refresh_path_separator(session, folder, "", ok);
3149         }
3150
3151         if (folder->last_seen_separator == 0) {
3152                 folder->last_seen_separator = imap_refresh_path_separator(session, folder, "INBOX", ok);
3153         }
3154
3155         if (folder->last_seen_separator != 0) {
3156                 debug_print("using separator: %c\n", folder->last_seen_separator);
3157                 return folder->last_seen_separator;
3158         }
3159
3160         return separator;
3161 }
3162
3163 static gchar *imap_get_real_path(IMAPSession *session, IMAPFolder *folder, const gchar *path, gint *ok)
3164 {
3165         gchar *real_path;
3166         gchar separator;
3167
3168         g_return_val_if_fail(folder != NULL, NULL);
3169         g_return_val_if_fail(path != NULL, NULL);
3170
3171         real_path = imap_utf8_to_modified_utf7(path, FALSE);
3172         separator = imap_get_path_separator(session, folder, path, ok);
3173         imap_path_separator_subst(real_path, separator);
3174
3175         return real_path;
3176 }
3177
3178 static gint imap_set_message_flags(IMAPSession *session,
3179                                    IMAPFolderItem *item,
3180                                    MsgNumberList *numlist,
3181                                    IMAPFlags flags,
3182                                    GSList *tags,
3183                                    gboolean is_set)
3184 {
3185         gint ok = 0;
3186         GSList *seq_list;
3187         GSList * cur;
3188         gint total = 0;
3189         IMAPFolder *folder = NULL;
3190         GSList *sorted_list = NULL;
3191
3192         if (numlist == NULL || session == NULL)
3193                 return MAILIMAP_ERROR_BAD_STATE;
3194
3195         folder = IMAP_FOLDER(session->folder);
3196
3197         sorted_list = g_slist_copy(numlist);
3198         sorted_list = g_slist_sort(sorted_list, g_int_compare);
3199
3200         cur = g_slist_last(sorted_list);
3201
3202         if (cur)
3203                 total = GPOINTER_TO_INT(cur->data);
3204
3205         seq_list = imap_get_lep_set_from_numlist(IMAP_FOLDER(session->folder), sorted_list);
3206
3207         statusbar_print_all(_("Flagging messages..."));
3208
3209         for(cur = seq_list ; cur != NULL ; cur = g_slist_next(cur)) {
3210                 struct mailimap_set * imapset = (struct mailimap_set *)cur->data;
3211                 struct mailimap_set_item *set_item = clist_content(
3212                                                         clist_begin(imapset->set_list));
3213
3214                 statusbar_progress_all(set_item->set_first, total, 1);
3215
3216                 ok = imap_cmd_store(session, item, imapset,
3217                                     flags, tags, is_set);
3218                 statusbar_progress_all(set_item->set_last, total, 1);
3219                 if (ok != MAILIMAP_NO_ERROR && folder->max_set_size > 20) {
3220                         /* reduce max set size */
3221                         folder->max_set_size /= 2;
3222                 }
3223                 if (ok != MAILIMAP_NO_ERROR && is_fatal(ok)) {
3224                         break;
3225                 }
3226         }
3227
3228         g_slist_free(sorted_list);
3229
3230         statusbar_progress_all(0,0,0);
3231         statusbar_pop_all();
3232
3233         imap_lep_set_free(seq_list);
3234
3235         return ok;
3236 }
3237
3238 typedef struct _select_data {
3239         IMAPSession *session;
3240         gchar *real_path;
3241         gint *exists;
3242         gint *recent;
3243         gint *unseen;
3244         guint32 *uid_validity;
3245         gboolean done;
3246 } select_data;
3247
3248 static gint imap_select(IMAPSession *session, IMAPFolder *folder,
3249                         FolderItem *item,
3250                         gint *exists, gint *recent, gint *unseen,
3251                         guint32 *uid_validity, gint *can_create_flags,
3252                         gboolean block)
3253 {
3254         gchar *real_path;
3255         gint ok;
3256         gint exists_, recent_, unseen_;
3257         guint32 uid_validity_;
3258         gint can_create_flags_;
3259         const gchar *path = item ? item->path:NULL;
3260
3261         if (!item) {
3262                 return MAILIMAP_ERROR_BAD_STATE;
3263         }
3264
3265         if (!exists && !recent && !unseen && !uid_validity && !can_create_flags) {
3266                 if (session->mbox && strcmp(session->mbox, path) == 0)
3267                         return MAILIMAP_NO_ERROR;
3268         }
3269         if (!exists && !recent && !unseen && !uid_validity && can_create_flags) {
3270                 if (session->mbox && strcmp(session->mbox, path) == 0) {
3271                         if (IMAP_FOLDER_ITEM(item)->can_create_flags != ITEM_CAN_CREATE_FLAGS_UNKNOWN)
3272                                 return MAILIMAP_NO_ERROR;
3273                 }
3274         }
3275         if (!exists)
3276                 exists = &exists_;
3277         if (!recent)
3278                 recent = &recent_;
3279         if (!unseen)
3280                 unseen = &unseen_;
3281         if (!uid_validity)
3282                 uid_validity = &uid_validity_;
3283         if (!can_create_flags)
3284                 can_create_flags = &can_create_flags_;
3285
3286         g_free(session->mbox);
3287         session->mbox = NULL;
3288         session->exists = 0;
3289         session->recent = 0;
3290         session->expunge = 0;
3291
3292         real_path = imap_get_real_path(session, folder, path, &ok);
3293         if (is_fatal(ok))
3294                 return ok;
3295         g_slist_free(IMAP_FOLDER_ITEM(item)->ok_flags);
3296         IMAP_FOLDER_ITEM(item)->ok_flags = NULL;
3297         ok = imap_cmd_select(session, real_path,
3298                              exists, recent, unseen, uid_validity, can_create_flags,
3299                              &(IMAP_FOLDER_ITEM(item)->ok_flags), block);
3300         if (ok != MAILIMAP_NO_ERROR) {
3301                 log_warning(LOG_PROTOCOL, _("can't select folder: %s\n"), real_path);
3302         } else {
3303                 session->mbox = g_strdup(path);
3304                 session->folder_content_changed = FALSE;
3305                 session->exists = *exists;
3306                 session->recent = *recent;
3307                 session->expunge = 0;
3308                 session->unseen = *unseen;
3309                 session->uid_validity = *uid_validity;
3310                 debug_print("select: exists %d recent %d expunge %d uid_validity %d can_create_flags %d\n",
3311                         session->exists, session->recent, session->expunge,
3312                         session->uid_validity, *can_create_flags);
3313         }
3314         if (*can_create_flags) {
3315                 IMAP_FOLDER_ITEM(item)->can_create_flags = ITEM_CAN_CREATE_FLAGS;
3316         } else {
3317                 IMAP_FOLDER_ITEM(item)->can_create_flags = ITEM_CANNOT_CREATE_FLAGS;
3318         }
3319         g_free(real_path);
3320
3321         return ok;
3322 }
3323
3324 static gint imap_status(IMAPSession *session, IMAPFolder *folder,
3325                         const gchar *path, IMAPFolderItem *item,
3326                         gint *messages,
3327                         guint32 *uid_next, guint32 *uid_validity,
3328                         gint *unseen, gboolean block)
3329 {
3330         int r;
3331         clistiter * iter;
3332         struct mailimap_mailbox_data_status * data_status;
3333         int got_values;
3334         gchar *real_path;
3335         guint mask = 0;
3336
3337         real_path = imap_get_real_path(session, folder, path, &r);
3338         if (is_fatal(r))
3339                 return r;
3340
3341         if (messages) {
3342                 mask |= 1 << 0;
3343                 *messages = 0;
3344         }
3345         if (uid_next) {
3346                 mask |= 1 << 2;
3347                 *uid_next = 0;
3348         }
3349         if (uid_validity) {
3350                 mask |= 1 << 3;
3351                 *uid_validity = 0;
3352         }
3353         if (unseen) {
3354                 mask |= 1 << 4;
3355                 *unseen = 0;
3356         }
3357
3358         if (session->mbox != NULL &&
3359             !strcmp(session->mbox, item->item.path)) {
3360                 r = imap_cmd_close(session);
3361                 if (r != MAILIMAP_NO_ERROR) {
3362                         debug_print("close err %d\n", r);
3363                         return r;
3364                 }
3365         }
3366
3367         r = imap_threaded_status(FOLDER(folder), real_path,
3368                 &data_status, mask);
3369
3370         g_free(real_path);
3371         if (r != MAILIMAP_NO_ERROR) {
3372                 imap_handle_error(SESSION(session), r);
3373                 debug_print("status err %d\n", r);
3374                 return r;
3375         }
3376
3377         if (data_status->st_info_list == NULL) {
3378                 mailimap_mailbox_data_status_free(data_status);
3379                 debug_print("status->st_info_list == NULL\n");
3380                 return MAILIMAP_ERROR_BAD_STATE;
3381         }
3382
3383         got_values = 0;
3384         for(iter = clist_begin(data_status->st_info_list) ; iter != NULL ;
3385             iter = clist_next(iter)) {
3386                 struct mailimap_status_info * info;
3387
3388                 info = clist_content(iter);
3389                 switch (info->st_att) {
3390                 case MAILIMAP_STATUS_ATT_MESSAGES:
3391                         if (messages) {
3392                                 * messages = info->st_value;
3393                                 got_values |= 1 << 0;
3394                         }
3395                         break;
3396
3397                 case MAILIMAP_STATUS_ATT_UIDNEXT:
3398                         if (uid_next) {
3399                                 * uid_next = info->st_value;
3400                                 got_values |= 1 << 2;
3401                         }
3402                         break;
3403
3404                 case MAILIMAP_STATUS_ATT_UIDVALIDITY:
3405                         if (uid_validity) {
3406                                 * uid_validity = info->st_value;
3407                                 got_values |= 1 << 3;
3408                         }
3409                         break;
3410
3411                 case MAILIMAP_STATUS_ATT_UNSEEN:
3412                         if (unseen) {
3413                                 * unseen = info->st_value;
3414                                 got_values |= 1 << 4;
3415                         }
3416                         break;
3417                 }
3418         }
3419         mailimap_mailbox_data_status_free(data_status);
3420
3421         if (got_values != mask) {
3422                 g_warning("status: incomplete values received (%d)\n", got_values);
3423         }
3424         return MAILIMAP_NO_ERROR;
3425 }
3426
3427 static void imap_free_capabilities(IMAPSession *session)
3428 {
3429         slist_free_strings(session->capability);
3430         g_slist_free(session->capability);
3431         session->capability = NULL;
3432 }
3433
3434 /* low-level IMAP4rev1 commands */
3435
3436 static gint imap_cmd_login(IMAPSession *session,
3437                            const gchar *user, const gchar *pass,
3438                            const gchar *type)
3439 {
3440         int r;
3441         gint ok;
3442
3443         if (!strcmp(type, "LOGIN") && imap_has_capability(session, "LOGINDISABLED")) {
3444                 gint ok = MAILIMAP_ERROR_BAD_STATE;
3445                 if (imap_has_capability(session, "STARTTLS")) {
3446 #if (defined(USE_OPENSSL) || defined (USE_GNUTLS))
3447                         log_warning(LOG_PROTOCOL, _("Server requires TLS to log in.\n"));
3448                         ok = imap_cmd_starttls(session);
3449                         if (ok != MAILIMAP_NO_ERROR) {
3450                                 log_warning(LOG_PROTOCOL, _("Can't start TLS session.\n"));
3451                                 return ok;
3452                         } else {
3453                                 /* refresh capas */
3454                                 imap_free_capabilities(session);
3455                                 if ((r = imap_get_capabilities(session)) != MAILIMAP_NO_ERROR) {
3456                                         imap_handle_error(SESSION(session), r);
3457                                         log_warning(LOG_PROTOCOL, _("Can't refresh capabilities.\n"));
3458                                         return r;
3459                                 }
3460                         }
3461 #else
3462                         log_error(LOG_PROTOCOL, _("Connection to %s failed: "
3463                                         "server requires TLS, but Claws Mail "
3464                                         "has been compiled without OpenSSL "
3465                                         "support.\n"),
3466                                         SESSION(session)->server);
3467                         return MAILIMAP_ERROR_LOGIN;
3468 #endif
3469                 } else {
3470                         log_error(LOG_PROTOCOL, _("Server logins are disabled.\n"));
3471                         return MAILIMAP_ERROR_LOGIN;
3472                 }
3473         }
3474
3475         log_print(LOG_PROTOCOL, "IMAP4> Logging %s to %s using %s\n",
3476                         user,
3477                         SESSION(session)->server,
3478                         type);
3479         r = imap_threaded_login(session->folder, user, pass, type);
3480         if (r != MAILIMAP_NO_ERROR) {
3481                 imap_handle_error(SESSION(session), r);
3482                 log_print(LOG_PROTOCOL, "IMAP4< Error logging in to %s\n",
3483                                 SESSION(session)->server);
3484                 ok = r;
3485         } else {
3486                 log_print(LOG_PROTOCOL, "IMAP4< Login to %s successful\n",
3487                                 SESSION(session)->server);
3488                 ok = MAILIMAP_NO_ERROR;
3489         }
3490         return ok;
3491 }
3492
3493 static gint imap_cmd_noop(IMAPSession *session)
3494 {
3495         int r;
3496         unsigned int exists, recent, expunge, unseen, uidnext, uidval;
3497
3498         r = imap_threaded_noop(session->folder, &exists, &recent, &expunge, &unseen, &uidnext, &uidval);
3499         if (r != MAILIMAP_NO_ERROR) {
3500                 imap_handle_error(SESSION(session), r);
3501                 debug_print("noop err %d\n", r);
3502                 return r;
3503         }
3504
3505         session->folder_content_changed = FALSE;
3506
3507         if ((exists && exists != session->exists)
3508          || (recent && recent != session->recent)
3509          || (expunge && expunge != session->expunge)
3510          || (unseen && unseen != session->unseen)) {
3511                 session->folder_content_changed = TRUE;
3512         }
3513         if (uidnext != 0 && uidnext != session->uid_next) {
3514                 session->uid_next = uidnext;
3515                 session->folder_content_changed = TRUE;
3516         }
3517         if (uidval != 0 && uidval != session->uid_validity) {
3518                 session->uid_validity = uidval;
3519                 session->folder_content_changed = TRUE;
3520         }
3521
3522         session->exists = exists;
3523         session->recent = recent;
3524         session->expunge = expunge;
3525         session->unseen = unseen;
3526
3527         session_set_access_time(SESSION(session));
3528
3529         return MAILIMAP_NO_ERROR;
3530 }
3531
3532 #if (defined(USE_OPENSSL) || defined (USE_GNUTLS))
3533 static gint imap_cmd_starttls(IMAPSession *session)
3534 {
3535         int r;
3536
3537         r = imap_threaded_starttls(session->folder,
3538                 SESSION(session)->server, SESSION(session)->port);
3539         if (r != MAILIMAP_NO_ERROR) {
3540                 imap_handle_error(SESSION(session), r);
3541                 debug_print("starttls err %d\n", r);
3542                 return r;
3543         }
3544         return MAILIMAP_NO_ERROR;
3545 }
3546 #endif
3547
3548 static gint imap_cmd_select(IMAPSession *session, const gchar *folder,
3549                             gint *exists, gint *recent, gint *unseen,
3550                             guint32 *uid_validity, gint *can_create_flags,
3551                             GSList **ok_flags, gboolean block)
3552 {
3553         int r;
3554
3555         r = imap_threaded_select(session->folder, folder,
3556                                  exists, recent, unseen, uid_validity, can_create_flags, ok_flags);
3557         if (r != MAILIMAP_NO_ERROR) {
3558                 imap_handle_error(SESSION(session), r);
3559                 debug_print("select err %d\n", r);
3560                 return r;
3561         }
3562         return MAILIMAP_NO_ERROR;
3563 }
3564
3565 static gint imap_cmd_close(IMAPSession *session)
3566 {
3567         int r;
3568
3569         r = imap_threaded_close(session->folder);
3570         if (r != MAILIMAP_NO_ERROR) {
3571                 imap_handle_error(SESSION(session), r);
3572                 debug_print("close err %d\n", r);
3573                 return r;
3574         }
3575         g_free(session->mbox);
3576         session->mbox = NULL;
3577         session->exists = 0;
3578         session->recent = 0;
3579         session->expunge = 0;
3580         return MAILIMAP_NO_ERROR;
3581 }
3582
3583 static gint imap_cmd_examine(IMAPSession *session, const gchar *folder,
3584                              gint *exists, gint *recent, gint *unseen,
3585                              guint32 *uid_validity, gboolean block)
3586 {
3587         int r;
3588
3589         r = imap_threaded_examine(session->folder, folder,
3590                                   exists, recent, unseen, uid_validity);
3591         if (r != MAILIMAP_NO_ERROR) {
3592                 imap_handle_error(SESSION(session), r);
3593                 debug_print("examine err %d\n", r);
3594
3595                 return r;
3596         }
3597         return MAILIMAP_NO_ERROR;
3598 }
3599
3600 static gint imap_cmd_create(IMAPSession *session, const gchar *folder)
3601 {
3602         int r;
3603
3604         r = imap_threaded_create(session->folder, folder);
3605         if (r != MAILIMAP_NO_ERROR) {
3606                 imap_handle_error(SESSION(session), r);
3607                 return r;
3608         }
3609
3610         return MAILIMAP_NO_ERROR;
3611 }
3612
3613 static gint imap_cmd_rename(IMAPSession *session, const gchar *old_folder,
3614                             const gchar *new_folder)
3615 {
3616         int r;
3617
3618         r = imap_threaded_rename(session->folder, old_folder,
3619                                  new_folder);
3620         if (r != MAILIMAP_NO_ERROR) {
3621                 imap_handle_error(SESSION(session), r);
3622                 return r;
3623         }
3624
3625         return MAILIMAP_NO_ERROR;
3626 }
3627
3628 static gint imap_cmd_delete(IMAPSession *session, const gchar *folder)
3629 {
3630         int r;
3631
3632
3633         r = imap_threaded_delete(session->folder, folder);
3634         if (r != MAILIMAP_NO_ERROR) {
3635                 imap_handle_error(SESSION(session), r);
3636                 return r;
3637         }
3638
3639         return MAILIMAP_NO_ERROR;
3640 }
3641
3642 typedef struct _fetch_data {
3643         IMAPSession *session;
3644         guint32 uid;
3645         const gchar *filename;
3646         gboolean headers;
3647         gboolean body;
3648         gboolean done;
3649 } fetch_data;
3650
3651 static void *imap_cmd_fetch_thread(void *data)
3652 {
3653         fetch_data *stuff = (fetch_data *)data;
3654         IMAPSession *session = stuff->session;
3655         guint32 uid = stuff->uid;
3656         const gchar *filename = stuff->filename;
3657         int r;
3658
3659         if (stuff->body) {
3660                 r = imap_threaded_fetch_content(session->folder,
3661                                                uid, 1, filename);
3662         }
3663         else {
3664                 r = imap_threaded_fetch_content(session->folder,
3665                                                 uid, 0, filename);
3666         }
3667         if (r != MAILIMAP_NO_ERROR) {
3668                 imap_handle_error(SESSION(session), r);
3669                 debug_print("fetch err %d\n", r);
3670                 return GINT_TO_POINTER(r);
3671         }
3672         return GINT_TO_POINTER(MAILIMAP_NO_ERROR);
3673 }
3674
3675 static gint imap_cmd_fetch(IMAPSession *session, guint32 uid,
3676                                 const gchar *filename, gboolean headers,
3677                                 gboolean body)
3678 {
3679         fetch_data *data = g_new0(fetch_data, 1);
3680         int result = 0;
3681         data->done = FALSE;
3682         data->session = session;
3683         data->uid = uid;
3684         data->filename = filename;
3685         data->headers = headers;
3686         data->body = body;
3687
3688         if (prefs_common.work_offline &&
3689             !inc_offline_should_override(FALSE,
3690                 _("Claws Mail needs network access in order "
3691                   "to access the IMAP server."))) {
3692                 g_free(data);
3693                 return -1;
3694         }
3695         statusbar_print_all(_("Fetching message..."));
3696         result = GPOINTER_TO_INT(imap_cmd_fetch_thread(data));
3697         statusbar_pop_all();
3698         g_free(data);
3699         return result;
3700 }
3701
3702
3703 static gint imap_cmd_append(IMAPSession *session,
3704                             IMAPFolderItem *item,
3705                             const gchar *destfolder,
3706                             const gchar *file, IMAPFlags flags,
3707                             guint32 *new_uid)
3708 {
3709         struct mailimap_flag_list * flag_list;
3710         int r;
3711
3712         g_return_val_if_fail(file != NULL, MAILIMAP_ERROR_BAD_STATE);
3713
3714         flag_list = imap_flag_to_lep(item, flags, NULL);
3715         lock_session(session);
3716         r = imap_threaded_append(session->folder, destfolder,
3717                          file, flag_list, (int *)new_uid);
3718         mailimap_flag_list_free(flag_list);
3719
3720         if (r != MAILIMAP_NO_ERROR) {
3721                 imap_handle_error(SESSION(session), r);
3722                 debug_print("append err %d\n", r);
3723                 return r;
3724         }
3725
3726         unlock_session(session);
3727
3728         return MAILIMAP_NO_ERROR;
3729 }
3730
3731 static gint imap_cmd_copy(IMAPSession *session, struct mailimap_set * set,
3732                           const gchar *destfolder, GRelation *uid_mapping,
3733                           struct mailimap_set **source, struct mailimap_set **dest)
3734 {
3735         int r;
3736
3737         g_return_val_if_fail(session != NULL, MAILIMAP_ERROR_BAD_STATE);
3738         g_return_val_if_fail(set != NULL, MAILIMAP_ERROR_BAD_STATE);
3739         g_return_val_if_fail(destfolder != NULL, MAILIMAP_ERROR_BAD_STATE);
3740
3741         r = imap_threaded_copy(session->folder, set, destfolder, source, dest);
3742         if (r != MAILIMAP_NO_ERROR) {
3743                 imap_handle_error(SESSION(session), r);
3744                 return r;
3745         }
3746
3747         return MAILIMAP_NO_ERROR;
3748 }
3749
3750 static gint imap_cmd_store(IMAPSession *session,
3751                            IMAPFolderItem *item,
3752                            struct mailimap_set * set,
3753                            IMAPFlags flags, GSList *tags, int do_add)
3754 {
3755         int r;
3756         struct mailimap_flag_list * flag_list = NULL;
3757         struct mailimap_store_att_flags * store_att_flags;
3758
3759         flag_list = imap_flag_to_lep(item, flags, tags);
3760
3761         if (do_add)
3762                 store_att_flags =
3763                         mailimap_store_att_flags_new_add_flags_silent(flag_list);
3764         else
3765                 store_att_flags =
3766                         mailimap_store_att_flags_new_remove_flags_silent(flag_list);
3767
3768         r = imap_threaded_store(session->folder, set, store_att_flags);
3769         mailimap_store_att_flags_free(store_att_flags);
3770         if (r != MAILIMAP_NO_ERROR) {
3771                 imap_handle_error(SESSION(session), r);
3772                 return r;
3773         }
3774
3775         return MAILIMAP_NO_ERROR;
3776 }
3777
3778 static gint imap_cmd_expunge(IMAPSession *session)
3779 {
3780         int r;
3781
3782         if (prefs_common.work_offline &&
3783             !inc_offline_should_override(FALSE,
3784                 _("Claws Mail needs network access in order "
3785                   "to access the IMAP server."))) {
3786                 return -1;
3787         }
3788
3789         r = imap_threaded_expunge(session->folder);
3790         if (r != MAILIMAP_NO_ERROR) {
3791                 imap_handle_error(SESSION(session), r);
3792                 return r;
3793         }
3794
3795         return MAILIMAP_NO_ERROR;
3796 }
3797
3798 static void imap_path_separator_subst(gchar *str, gchar separator)
3799 {
3800         gchar *p;
3801         gboolean in_escape = FALSE;
3802
3803         if (!separator || separator == '/') return;
3804
3805         for (p = str; *p != '\0'; p++) {
3806                 if (*p == '/' && !in_escape)
3807                         *p = separator;
3808                 else if (*p == '&' && *(p + 1) != '-' && !in_escape)
3809                         in_escape = TRUE;
3810                 else if (*p == '-' && in_escape)
3811                         in_escape = FALSE;
3812         }
3813 }
3814
3815 static gboolean imap_rename_folder_func(GNode *node, gpointer data)
3816 {
3817         FolderItem *item = node->data;
3818         gchar **paths = data;
3819         const gchar *oldpath = paths[0];
3820         const gchar *newpath = paths[1];
3821         gchar *real_oldpath, *real_newpath;
3822         gchar *base;
3823         gchar *new_itempath;
3824         gint oldpathlen;
3825         IMAPSession *session = imap_session_get(item->folder);
3826         gint ok;
3827         oldpathlen = strlen(oldpath);
3828         if (strncmp(oldpath, item->path, oldpathlen) != 0) {
3829                 g_warning("path doesn't match: %s, %s\n", oldpath, item->path);
3830                 return TRUE;
3831         }
3832
3833         base = item->path + oldpathlen;
3834         while (*base == G_DIR_SEPARATOR) base++;
3835         if (*base == '\0')
3836                 new_itempath = g_strdup(newpath);
3837         else
3838                 new_itempath = g_strconcat(newpath, G_DIR_SEPARATOR_S, base,
3839                                            NULL);
3840
3841         real_oldpath = imap_get_real_path(session, IMAP_FOLDER(item->folder), item->path, &ok);
3842         g_free(item->path);
3843         item->path = new_itempath;
3844
3845         real_newpath = imap_get_real_path(session, IMAP_FOLDER(item->folder), item->path, &ok);
3846
3847         imap_threaded_subscribe(item->folder, real_oldpath, FALSE);
3848         imap_threaded_subscribe(item->folder, real_newpath, TRUE);
3849
3850         g_free(real_oldpath);
3851         g_free(real_newpath);
3852         return FALSE;
3853 }
3854
3855 static gint get_list_of_uids(IMAPSession *session, Folder *folder, IMAPFolderItem *item, GSList **msgnum_list)
3856 {
3857         GSList *uidlist, *elem;
3858         int r = -1;
3859         clist * lep_uidlist;
3860         gint ok, nummsgs = 0, lastuid_old;
3861
3862         if (session == NULL) {
3863                 return -1;
3864         }
3865
3866         ok = imap_select(session, IMAP_FOLDER(folder), FOLDER_ITEM(item),
3867                          NULL, NULL, NULL, NULL, NULL, TRUE);
3868         if (ok != MAILIMAP_NO_ERROR) {
3869                 return -1;
3870         }
3871
3872         g_slist_free(item->uid_list);
3873         item->uid_list = NULL;
3874
3875         uidlist = NULL;
3876
3877         if (folder->account && folder->account->low_bandwidth) {
3878                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SIMPLE, NULL,
3879                                  &lep_uidlist);
3880         }
3881
3882         if (r == MAILIMAP_NO_ERROR) {
3883                 GSList * fetchuid_list =
3884                         imap_uid_list_from_lep(lep_uidlist);
3885                 mailimap_search_result_free(lep_uidlist);
3886
3887                 uidlist = g_slist_concat(fetchuid_list, uidlist);
3888         } else {
3889                 carray * lep_uidtab;
3890                 if (r != -1) { /* inited */
3891                         imap_handle_error(SESSION(session), r);
3892                         if (is_fatal(r))
3893                                 return -1;
3894                 }
3895                 r = imap_threaded_fetch_uid(folder, 1,
3896                                     &lep_uidtab);
3897                 if (r == MAILIMAP_NO_ERROR) {
3898                         GSList * fetchuid_list =
3899                                 imap_uid_list_from_lep_tab(lep_uidtab);
3900                         imap_fetch_uid_list_free(lep_uidtab);
3901                         uidlist = g_slist_concat(fetchuid_list, uidlist);
3902                 }
3903         }
3904
3905         if (r != MAILIMAP_NO_ERROR) {
3906                 imap_handle_error(SESSION(session), r);
3907                 return -1;
3908         }
3909
3910         lastuid_old = item->lastuid;
3911
3912         for (elem = uidlist; elem != NULL; elem = g_slist_next(elem)) {
3913                 guint msgnum;
3914
3915                 msgnum = GPOINTER_TO_INT(elem->data);
3916
3917                 *msgnum_list = g_slist_prepend(*msgnum_list, GINT_TO_POINTER(msgnum));
3918                 item->uid_list = g_slist_prepend(item->uid_list, GINT_TO_POINTER(msgnum));
3919                 nummsgs++;
3920         }
3921         g_slist_free(uidlist);
3922
3923         unlock_session(session); /* locked from imap_get_num_list */
3924
3925         return nummsgs;
3926
3927 }
3928
3929 gint imap_get_num_list(Folder *folder, FolderItem *_item, GSList **msgnum_list, gboolean *old_uids_valid)
3930 {
3931         IMAPFolderItem *item = (IMAPFolderItem *)_item;
3932         IMAPSession *session;
3933         gint nummsgs;
3934         GSList *uidlist = NULL;
3935         gchar *dir;
3936         gboolean selected_folder;
3937         gint known_list_len = 0;
3938         debug_print("get_num_list\n");
3939
3940         g_return_val_if_fail(folder != NULL, -1);
3941         g_return_val_if_fail(item != NULL, -1);
3942         g_return_val_if_fail(item->item.path != NULL, -1);
3943         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
3944         g_return_val_if_fail(folder->account != NULL, -1);
3945
3946         known_list_len = g_slist_length(item->uid_list);
3947         if (!item->should_update) {
3948                 debug_print("get_num_list: nothing to update\n");
3949                 *old_uids_valid = TRUE;
3950                 if (known_list_len == item->item.total_msgs
3951                  && known_list_len > 0) {
3952                         *msgnum_list = g_slist_copy(item->uid_list);
3953                         return known_list_len;
3954                 } else {
3955                         debug_print("don't know the list length...\n");
3956                 }
3957         }
3958
3959         if (prefs_common.work_offline &&
3960             !inc_offline_should_override(FALSE,
3961                 _("Claws Mail needs network access in order "
3962                   "to access the IMAP server."))) {
3963                 return -1;
3964         }
3965
3966         debug_print("getting session...\n");
3967         session = imap_session_get(folder);
3968         g_return_val_if_fail(session != NULL, -1);
3969
3970         lock_session(session); /* unlocked by get_list_of_uids */
3971         if (FOLDER_ITEM(item)->path)
3972                 statusbar_print_all(_("Scanning folder %s%c%s ..."),
3973                                       FOLDER_ITEM(item)->folder->name,
3974                                       G_DIR_SEPARATOR,
3975                                       FOLDER_ITEM(item)->path);
3976         else
3977                 statusbar_print_all(_("Scanning folder %s ..."),
3978                                       FOLDER_ITEM(item)->folder->name);
3979
3980         selected_folder = (session->mbox != NULL) &&
3981                           (!strcmp(session->mbox, item->item.path));
3982
3983         if (item->should_trash_cache) {
3984                 *old_uids_valid = FALSE;
3985                 debug_print("get_num_list: trashing num list\n");
3986                 debug_print("Freeing imap uid cache\n");
3987                 item->lastuid = 0;
3988                 g_slist_free(item->uid_list);
3989                 item->uid_list = NULL;
3990
3991                 imap_delete_all_cached_messages((FolderItem *)item);
3992         } else {
3993                 debug_print("get_num_list: updating num list\n");
3994                 *old_uids_valid = TRUE;
3995         }
3996
3997         nummsgs = get_list_of_uids(session, folder, item, &uidlist);
3998         /* session could be broken now, in case of fatal error */
3999
4000         debug_print("get_num_list: got %d msgs\n", nummsgs);
4001
4002         if (nummsgs < 0) {
4003                 statusbar_pop_all();
4004                 return -1;
4005         }
4006
4007         *msgnum_list = uidlist;
4008
4009         dir = folder_item_get_path((FolderItem *)item);
4010         debug_print("removing old messages from %s\n", dir);
4011         remove_numbered_files_not_in_list(dir, *msgnum_list);
4012         g_free(dir);
4013
4014         debug_print("get_num_list - ok - %i\n", nummsgs);
4015         statusbar_pop_all();
4016         item->should_trash_cache = FALSE;
4017         item->should_update = FALSE;
4018         return nummsgs;
4019 }
4020
4021 static MsgInfo *imap_parse_msg(const gchar *file, FolderItem *item)
4022 {
4023         MsgInfo *msginfo;
4024         MsgFlags flags;
4025
4026         flags.perm_flags = MSG_NEW|MSG_UNREAD;
4027         flags.tmp_flags = 0;
4028
4029         g_return_val_if_fail(item != NULL, NULL);
4030         g_return_val_if_fail(file != NULL, NULL);
4031
4032         if (folder_has_parent_of_type(item, F_QUEUE)) {
4033                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
4034         } else if (folder_has_parent_of_type(item, F_DRAFT)) {
4035                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
4036         }
4037
4038         msginfo = procheader_parse_file(file, flags, FALSE, FALSE);
4039         if (!msginfo) return NULL;
4040
4041         msginfo->plaintext_file = g_strdup(file);
4042         msginfo->folder = item;
4043
4044         return msginfo;
4045 }
4046
4047 GSList *imap_get_msginfos(Folder *folder, FolderItem *item,
4048                           GSList *msgnum_list)
4049 {
4050         IMAPSession *session;
4051         MsgInfoList *ret = NULL;
4052         gint ok;
4053
4054         debug_print("get_msginfos\n");
4055
4056         g_return_val_if_fail(folder != NULL, NULL);
4057         g_return_val_if_fail(item != NULL, NULL);
4058         g_return_val_if_fail(msgnum_list != NULL, NULL);
4059
4060         debug_print("getting session...\n");
4061         session = imap_session_get(folder);
4062         g_return_val_if_fail(session != NULL, NULL);
4063
4064         lock_session(session); /* unlocked later in the function */
4065
4066         debug_print("IMAP getting msginfos\n");
4067         ok = imap_select(session, IMAP_FOLDER(folder), item,
4068                          NULL, NULL, NULL, NULL, NULL, FALSE);
4069         if (ok != MAILIMAP_NO_ERROR) {
4070                 return NULL;
4071         }
4072         if (!(folder_has_parent_of_type(item, F_DRAFT) ||
4073               folder_has_parent_of_type(item, F_QUEUE))) {
4074                 ret = g_slist_concat(ret,
4075                         imap_get_uncached_messages(session, item,
4076                                                    msgnum_list, &ok));
4077                 if (ok != MAILIMAP_NO_ERROR)
4078                         return NULL;
4079                 unlock_session(session);
4080         } else {
4081                 MsgNumberList *sorted_list, *elem, *llast = NULL;
4082                 gint startnum, lastnum;
4083
4084                 unlock_session(session);
4085
4086                 sorted_list = g_slist_sort(g_slist_copy(msgnum_list), g_int_compare);
4087
4088                 startnum = lastnum = GPOINTER_TO_INT(sorted_list->data);
4089
4090                 llast = g_slist_last(ret);
4091                 for (elem = sorted_list;; elem = g_slist_next(elem)) {
4092                         guint num = 0;
4093
4094                         if (elem)
4095                                 num = GPOINTER_TO_INT(elem->data);
4096
4097                         if (num > lastnum + 1 || elem == NULL) {
4098                                 int i;
4099                                 for (i = startnum; i <= lastnum; ++i) {
4100                                         gchar *file;
4101                                         file = imap_fetch_msg(folder, item, i);
4102                                         if (file != NULL) {
4103                                                 MsgInfo *msginfo = imap_parse_msg(file, item);
4104                                                 if (msginfo != NULL) {
4105                                                         msginfo->msgnum = i;
4106                                                         if (llast == NULL)
4107                                                                 llast = ret = g_slist_append(ret, msginfo);
4108                                                         else {
4109                                                                 llast = g_slist_append(llast, msginfo);
4110                                                                 llast = llast->next;
4111                                                         }
4112                                                 }
4113                                                 g_free(file);
4114                                         }
4115                                 }
4116
4117                                 if (elem == NULL)
4118                                         break;
4119
4120                                 startnum = num;
4121                         }
4122                         lastnum = num;
4123                 }
4124
4125                 g_slist_free(sorted_list);
4126         }
4127         return ret;
4128 }
4129
4130 MsgInfo *imap_get_msginfo(Folder *folder, FolderItem *item, gint uid)
4131 {
4132         MsgInfo *msginfo = NULL;
4133         MsgInfoList *msginfolist;
4134         MsgNumberList numlist;
4135
4136         numlist.next = NULL;
4137         numlist.data = GINT_TO_POINTER(uid);
4138
4139         msginfolist = imap_get_msginfos(folder, item, &numlist);
4140         if (msginfolist != NULL) {
4141                 msginfo = msginfolist->data;
4142                 g_slist_free(msginfolist);
4143         }
4144
4145         return msginfo;
4146 }
4147
4148 gboolean imap_scan_required(Folder *folder, FolderItem *_item)
4149 {
4150         IMAPSession *session;
4151         IMAPFolderItem *item = (IMAPFolderItem *)_item;
4152         gint ok, exists = 0, unseen = 0;
4153         guint32 uid_next = 0, uid_val = 0;
4154         gboolean selected_folder;
4155
4156         g_return_val_if_fail(folder != NULL, FALSE);
4157         g_return_val_if_fail(item != NULL, FALSE);
4158         g_return_val_if_fail(item->item.folder != NULL, FALSE);
4159         g_return_val_if_fail(FOLDER_CLASS(item->item.folder) == &imap_class, FALSE);
4160
4161         if (item->item.path == NULL)
4162                 return FALSE;
4163
4164         if (item->should_update) {
4165                 debug_print("scan already required\n");
4166                 return TRUE;
4167         }
4168         debug_print("getting session...\n");
4169         session = imap_session_get(folder);
4170
4171         g_return_val_if_fail(session != NULL, FALSE);
4172         lock_session(session); /* unlocked later in the function */
4173
4174         selected_folder = (session->mbox != NULL) &&
4175                           (!strcmp(session->mbox, item->item.path));
4176         if (selected_folder) {
4177                 if (!session->folder_content_changed) {
4178                         ok = imap_cmd_noop(session);
4179                         if (ok != MAILIMAP_NO_ERROR) {
4180                                 debug_print("disconnected!\n");
4181                                 if (!is_fatal(ok))
4182                                         session = imap_reconnect_if_possible(folder, session);
4183                                 else
4184                                         session = imap_session_get(folder);
4185                                 if (session == NULL)
4186                                         return FALSE;
4187                         }
4188
4189                         if (session->folder_content_changed) {
4190                                 debug_print("CHANGED (self-noop)! scan_required\n");
4191                                 item->should_update = TRUE;
4192                                 if (session->uid_validity && session->uid_validity != item->item.mtime) {
4193                                         item->item.mtime = session->uid_validity;
4194                                         item->should_trash_cache = TRUE;
4195                                 }
4196                                 unlock_session(session);
4197                                 return TRUE;
4198                         }
4199                 } else {
4200                         debug_print("CHANGED (previous noop)! scan_required\n");
4201                         item->should_update = TRUE;
4202                         if (session->uid_validity && session->uid_validity != item->item.mtime) {
4203                                 item->item.mtime = session->uid_validity;
4204                                 item->should_trash_cache = TRUE;
4205                         }
4206                         unlock_session(session);
4207                         return TRUE;
4208                 }
4209         } else {
4210                 ok = imap_status(session, IMAP_FOLDER(folder), item->item.path, IMAP_FOLDER_ITEM(item),
4211                                  &exists, &uid_next, &uid_val, &unseen, FALSE);
4212                 if (ok != MAILIMAP_NO_ERROR) {
4213                         return FALSE;
4214                 }
4215
4216                 debug_print("exists %d, item->item.total_msgs %d\n",
4217                         exists, item->item.total_msgs);
4218                 if (exists != item->item.total_msgs
4219                     || unseen != item->item.unread_msgs
4220                     || uid_next != item->uid_next
4221                     || uid_val != item->item.mtime) {
4222                         debug_print("CHANGED (status)! scan_required\n");
4223                         item->last_change = time(NULL);
4224                         item->should_update = TRUE;
4225                         item->uid_next = uid_next;
4226                         if (uid_val != item->item.mtime) {
4227                                 item->item.mtime = uid_val;
4228                                 item->should_trash_cache = TRUE;
4229                         }
4230                         unlock_session(session);
4231                         return TRUE;
4232                 }
4233         }
4234         unlock_session(session);
4235
4236         item->should_update = FALSE;
4237         return FALSE;
4238 }
4239
4240 void imap_change_flags(Folder *folder, FolderItem *item, MsgInfo *msginfo, MsgPermFlags newflags)
4241 {
4242         IMAPSession *session;
4243         IMAPFlags flags_set = 0, flags_unset = 0;
4244         gint ok = MAILIMAP_NO_ERROR;
4245         MsgNumberList numlist;
4246         hashtable_data *ht_data = NULL;
4247
4248         g_return_if_fail(folder != NULL);
4249         g_return_if_fail(folder->klass == &imap_class);
4250         g_return_if_fail(item != NULL);
4251         g_return_if_fail(item->folder == folder);
4252         g_return_if_fail(msginfo != NULL);
4253         g_return_if_fail(msginfo->folder == item);
4254
4255         if (!MSG_IS_MARKED(msginfo->flags) &&  (newflags & MSG_MARKED))
4256                 flags_set |= IMAP_FLAG_FLAGGED;
4257         if ( MSG_IS_MARKED(msginfo->flags) && !(newflags & MSG_MARKED))
4258                 flags_unset |= IMAP_FLAG_FLAGGED;
4259
4260         if (!MSG_IS_UNREAD(msginfo->flags) &&  (newflags & MSG_UNREAD))
4261                 flags_unset |= IMAP_FLAG_SEEN;
4262         if ( MSG_IS_UNREAD(msginfo->flags) && !(newflags & MSG_UNREAD))
4263                 flags_set |= IMAP_FLAG_SEEN;
4264
4265         if (!MSG_IS_REPLIED(msginfo->flags) &&  (newflags & MSG_REPLIED))
4266                 flags_set |= IMAP_FLAG_ANSWERED;
4267         if ( MSG_IS_REPLIED(msginfo->flags) && !(newflags & MSG_REPLIED))
4268                 flags_unset |= IMAP_FLAG_ANSWERED;
4269
4270         if (!MSG_IS_FORWARDED(msginfo->flags) &&  (newflags & MSG_FORWARDED))
4271                 flags_set |= IMAP_FLAG_FORWARDED;
4272         if ( MSG_IS_FORWARDED(msginfo->flags) && !(newflags & MSG_FORWARDED))
4273                 flags_unset |= IMAP_FLAG_FORWARDED;
4274
4275         if (!MSG_IS_SPAM(msginfo->flags) &&  (newflags & MSG_SPAM)) {
4276                 flags_set |= IMAP_FLAG_SPAM;
4277                 flags_unset |= IMAP_FLAG_HAM;
4278         }
4279         if ( MSG_IS_SPAM(msginfo->flags) && !(newflags & MSG_SPAM)) {
4280                 flags_set |= IMAP_FLAG_HAM;
4281                 flags_unset |= IMAP_FLAG_SPAM;
4282         }
4283         if (!MSG_IS_DELETED(msginfo->flags) &&  (newflags & MSG_DELETED))
4284                 flags_set |= IMAP_FLAG_DELETED;
4285         if ( MSG_IS_DELETED(msginfo->flags) && !(newflags & MSG_DELETED))
4286                 flags_unset |= IMAP_FLAG_DELETED;
4287
4288         if (!flags_set && !flags_unset) {
4289                 /* the changed flags were not translatable to IMAP-speak.
4290                  * like MSG_POSTFILTERED, so just apply. */
4291                 msginfo->flags.perm_flags = newflags;
4292                 return;
4293         }
4294
4295         debug_print("getting session...\n");
4296         session = imap_session_get(folder);
4297         if (!session) {
4298                 return;
4299         }
4300
4301         if ((ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
4302             NULL, NULL, NULL, NULL, NULL, FALSE)) != MAILIMAP_NO_ERROR) {
4303                 return;
4304         }
4305         numlist.next = NULL;
4306         numlist.data = GINT_TO_POINTER(msginfo->msgnum);
4307
4308         if (IMAP_FOLDER_ITEM(item)->batching) {
4309                 /* instead of performing an UID STORE command for each message change,
4310                  * as a lot of them can change "together", we just fill in hashtables
4311                  * and defer the treatment so that we're able to send only one
4312                  * command.
4313                  */
4314                 debug_print("IMAP batch mode on, deferring flags change\n");
4315                 if (flags_set) {
4316                         ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->flags_set_table,
4317                                 GINT_TO_POINTER(flags_set));
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_set_table,
4322                                         GINT_TO_POINTER(flags_set), ht_data);
4323                         }
4324                         ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
4325                 }
4326                 if (flags_unset) {
4327                         ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->flags_unset_table,
4328                                 GINT_TO_POINTER(flags_unset));
4329                         if (ht_data == NULL) {
4330                                 ht_data = g_new0(hashtable_data, 1);
4331                                 ht_data->item = IMAP_FOLDER_ITEM(item);
4332                                 g_hash_table_insert(IMAP_FOLDER_ITEM(item)->flags_unset_table,
4333                                         GINT_TO_POINTER(flags_unset), ht_data);
4334                         }
4335                         ht_data->msglist = g_slist_prepend(ht_data->msglist,
4336                                         GINT_TO_POINTER(msginfo->msgnum));
4337                 }
4338         } else {
4339                 debug_print("IMAP changing flags\n");
4340                 if (flags_set) {
4341                         ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item), &numlist, flags_set, NULL, TRUE);
4342                         if (ok != MAILIMAP_NO_ERROR) {
4343                                 return;
4344                         }
4345                 }
4346
4347                 if (flags_unset) {
4348                         ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item), &numlist, flags_unset, NULL, FALSE);
4349                         if (ok != MAILIMAP_NO_ERROR) {
4350                                 return;
4351                         }
4352                 }
4353         }
4354         msginfo->flags.perm_flags = newflags;
4355         return;
4356 }
4357
4358 static gint imap_remove_msg(Folder *folder, FolderItem *item, gint uid)
4359 {
4360         gint ok;
4361         IMAPSession *session;
4362         gchar *dir;
4363         MsgNumberList numlist;
4364
4365         g_return_val_if_fail(folder != NULL, -1);
4366         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
4367         g_return_val_if_fail(item != NULL, -1);
4368
4369         debug_print("getting session...\n");
4370         session = imap_session_get(folder);
4371         if (!session) return -1;
4372
4373         ok = imap_select(session, IMAP_FOLDER(folder), item,
4374                          NULL, NULL, NULL, NULL, NULL, FALSE);
4375         if (ok != MAILIMAP_NO_ERROR) {
4376                 return ok;
4377         }
4378         numlist.next = NULL;
4379         numlist.data = GINT_TO_POINTER(uid);
4380
4381         ok = imap_set_message_flags
4382                 (session, IMAP_FOLDER_ITEM(item), &numlist, IMAP_FLAG_DELETED, NULL, TRUE);
4383         if (ok != MAILIMAP_NO_ERROR) {
4384                 log_warning(LOG_PROTOCOL, _("can't set deleted flags: %d\n"), uid);
4385                 return ok;
4386         }
4387
4388         if (!session->uidplus) {
4389                 ok = imap_cmd_expunge(session);
4390         } else {
4391                 gchar *uidstr;
4392
4393                 uidstr = g_strdup_printf("%u", uid);
4394                 ok = imap_cmd_expunge(session);
4395                 g_free(uidstr);
4396         }
4397         if (ok != MAILIMAP_NO_ERROR) {
4398                 log_warning(LOG_PROTOCOL, _("can't expunge\n"));
4399                 return ok;
4400         }
4401
4402         IMAP_FOLDER_ITEM(item)->uid_list = g_slist_remove(
4403             IMAP_FOLDER_ITEM(item)->uid_list, numlist.data);
4404         dir = folder_item_get_path(item);
4405         if (is_dir_exist(dir))
4406                 remove_numbered_files(dir, uid, uid);
4407         g_free(dir);
4408         return MAILIMAP_NO_ERROR;
4409 }
4410
4411 static gint compare_msginfo(gconstpointer a, gconstpointer b)
4412 {
4413         return ((MsgInfo *)a)->msgnum - ((MsgInfo *)b)->msgnum;
4414 }
4415
4416 static guint gslist_find_next_num(MsgNumberList **list, guint num)
4417 {
4418         GSList *elem;
4419
4420         g_return_val_if_fail(list != NULL, -1);
4421
4422         for (elem = *list; elem != NULL; elem = g_slist_next(elem))
4423                 if (GPOINTER_TO_INT(elem->data) >= num)
4424                         break;
4425         *list = elem;
4426         return elem != NULL ? GPOINTER_TO_INT(elem->data) : (gint)-1;
4427 }
4428
4429 static gboolean flag_ok(IMAPFolderItem *item, guint flag)
4430 {
4431         if (item->ok_flags && g_slist_find(item->ok_flags, GUINT_TO_POINTER(flag))) {
4432                 debug_print("flag %d is OK\n", flag);
4433                 return TRUE;
4434         }
4435         if (item->can_create_flags == ITEM_CAN_CREATE_FLAGS) {
4436                 debug_print("creating flags is OK\n");
4437                 return TRUE;
4438         }
4439         return FALSE;
4440 }
4441
4442 /*
4443  * NEW and DELETED flags are not syncronized
4444  * - The NEW/RECENT flags in IMAP folders can not really be directly
4445  *   modified by Sylpheed
4446  * - The DELETE/DELETED flag in IMAP and Sylpheed don't have the same
4447  *   meaning, in IMAP it always removes the messages from the FolderItem
4448  *   in Sylpheed it can mean to move the message to trash
4449  */
4450
4451 typedef struct _get_flags_data {
4452         Folder *folder;
4453         FolderItem *item;
4454         MsgInfoList *msginfo_list;
4455         GRelation *msgflags;
4456         gboolean full_search;
4457         gboolean done;
4458 } get_flags_data;
4459
4460 static /*gint*/ void *imap_get_flags_thread(void *data)
4461 {
4462         get_flags_data *stuff = (get_flags_data *)data;
4463         Folder *folder = stuff->folder;
4464         FolderItem *fitem = (FolderItem *) stuff->item;
4465         MsgInfoList *msginfo_list = stuff->msginfo_list;
4466         GRelation *msgflags = stuff->msgflags;
4467         GSList *elem;
4468         carray * lep_uidtab;
4469         IMAPSession *session;
4470         gint ok;
4471         int r = MAILIMAP_NO_ERROR;
4472         GHashTable *flags_hash = NULL;
4473         GHashTable *tags_hash = NULL;
4474         gboolean full_search = stuff->full_search;
4475         GSList *sorted_list = NULL;
4476         GSList *unseen = NULL, *answered = NULL, *flagged = NULL, *deleted = NULL, *forwarded = NULL, *spam = NULL;
4477         GSList *seq_list, *cur;
4478         gboolean reverse_seen = FALSE;
4479         gboolean selected_folder;
4480         gint exists_cnt, unseen_cnt;
4481         gboolean got_alien_tags = FALSE;
4482
4483         session = imap_session_get(folder);
4484
4485         if (session == NULL) {
4486                 stuff->done = TRUE;
4487                 return GINT_TO_POINTER(-1);
4488         }
4489         selected_folder = (session->mbox != NULL) &&
4490                           (!strcmp(session->mbox, fitem->path));
4491
4492         lock_session(session);
4493         if (!selected_folder) {
4494                 ok = imap_select(session, IMAP_FOLDER(folder), fitem,
4495                         &exists_cnt, NULL, &unseen_cnt, NULL, NULL, TRUE);
4496                 if (ok != MAILIMAP_NO_ERROR) {
4497                         stuff->done = TRUE;
4498                         return GINT_TO_POINTER(-1);
4499                 }
4500
4501                 if (unseen_cnt > exists_cnt / 2)
4502                         reverse_seen = TRUE;
4503         }
4504         else {
4505                 if (fitem->unread_msgs > fitem->total_msgs / 2)
4506                         reverse_seen = TRUE;
4507         }
4508
4509         sorted_list = g_slist_sort(g_slist_copy(msginfo_list), compare_msginfo);
4510         if (!full_search) {
4511                 seq_list = imap_get_lep_set_from_msglist(IMAP_FOLDER(folder), msginfo_list);
4512         } else {
4513                 struct mailimap_set * set;
4514                 set = mailimap_set_new_interval(1, 0);
4515                 seq_list = g_slist_append(NULL, set);
4516         }
4517
4518         if (folder->account && folder->account->low_bandwidth) {
4519                 for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
4520                         struct mailimap_set * imapset;
4521                         clist * lep_uidlist;
4522                         int r;
4523
4524                         imapset = cur->data;
4525                         if (reverse_seen) {
4526                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SEEN,
4527                                                          full_search ? NULL:imapset, &lep_uidlist);
4528                         }
4529                         else {
4530                                 r = imap_threaded_search(folder,
4531                                                          IMAP_SEARCH_TYPE_UNSEEN,
4532                                                          full_search ? NULL:imapset, &lep_uidlist);
4533                         }
4534                         if (r == MAILIMAP_NO_ERROR) {
4535                                 GSList * uidlist;
4536
4537                                 uidlist = imap_uid_list_from_lep(lep_uidlist);
4538                                 mailimap_search_result_free(lep_uidlist);
4539
4540                                 unseen = g_slist_concat(unseen, uidlist);
4541                         } else {
4542                                 imap_handle_error(SESSION(session), r);
4543                                 goto bail;
4544                         }
4545
4546                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_FLAGGED,
4547                                                  full_search ? NULL:imapset, &lep_uidlist);
4548                         if (r == MAILIMAP_NO_ERROR) {
4549                                 GSList * uidlist;
4550
4551                                 uidlist = imap_uid_list_from_lep(lep_uidlist);
4552                                 mailimap_search_result_free(lep_uidlist);
4553
4554                                 flagged = g_slist_concat(flagged, uidlist);
4555                         } else {
4556                                 imap_handle_error(SESSION(session), r);
4557                                 goto bail;
4558                         }
4559
4560                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
4561                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_ANSWERED,
4562                                                          full_search ? NULL:imapset, &lep_uidlist);
4563                                 if (r == MAILIMAP_NO_ERROR) {
4564                                         GSList * uidlist;
4565
4566                                         uidlist = imap_uid_list_from_lep(lep_uidlist);
4567                                         mailimap_search_result_free(lep_uidlist);
4568
4569                                         answered = g_slist_concat(answered, uidlist);
4570                                 } else {
4571                                         imap_handle_error(SESSION(session), r);
4572                                         goto bail;
4573                                 }
4574
4575                                 if (flag_ok(IMAP_FOLDER_ITEM(fitem), IMAP_FLAG_FORWARDED)) {
4576                                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_FORWARDED,
4577                                                                  full_search ? NULL:imapset, &lep_uidlist);
4578                                         if (r == MAILIMAP_NO_ERROR) {
4579                                                 GSList * uidlist;
4580
4581                                                 uidlist = imap_uid_list_from_lep(lep_uidlist);
4582                                                 mailimap_search_result_free(lep_uidlist);
4583
4584                                                 forwarded = g_slist_concat(forwarded, uidlist);
4585                                         } else {
4586                                                 imap_handle_error(SESSION(session), r);
4587                                                 goto bail;
4588                                         }
4589                                 }
4590
4591                                 if (flag_ok(IMAP_FOLDER_ITEM(fitem), IMAP_FLAG_SPAM)) {
4592                                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SPAM,
4593                                                                  full_search ? NULL:imapset, &lep_uidlist);
4594                                         if (r == MAILIMAP_NO_ERROR) {
4595                                                 GSList * uidlist;
4596
4597                                                 uidlist = imap_uid_list_from_lep(lep_uidlist);
4598                                                 mailimap_search_result_free(lep_uidlist);
4599
4600                                                 spam = g_slist_concat(spam, uidlist);
4601                                         } else {
4602                                                 imap_handle_error(SESSION(session), r);
4603                                                 goto bail;
4604                                         }
4605                                 }
4606
4607                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_DELETED,
4608                                                          full_search ? NULL:imapset, &lep_uidlist);
4609                                 if (r == MAILIMAP_NO_ERROR) {
4610                                         GSList * uidlist;
4611
4612                                         uidlist = imap_uid_list_from_lep(lep_uidlist);
4613                                         mailimap_search_result_free(lep_uidlist);
4614
4615                                         deleted = g_slist_concat(deleted, uidlist);
4616                                 } else {
4617                                         imap_handle_error(SESSION(session), r);
4618                                         goto bail;
4619                                 }
4620                         }
4621                 }
4622
4623         } else {
4624                 r = imap_threaded_fetch_uid_flags(folder, 1, &lep_uidtab);
4625                 if (r == MAILIMAP_NO_ERROR) {
4626                         flags_hash = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, NULL);
4627                         tags_hash = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, NULL);
4628                         imap_flags_hash_from_lep_uid_flags_tab(lep_uidtab, flags_hash, tags_hash);
4629                         imap_fetch_uid_flags_list_free(lep_uidtab);
4630                 } else {
4631                         imap_handle_error(SESSION(session), r);
4632                         goto bail;
4633                 }
4634         }
4635
4636 bail:
4637         if (r == MAILIMAP_NO_ERROR)
4638                 unlock_session(session);
4639
4640         for (elem = sorted_list; elem != NULL; elem = g_slist_next(elem)) {
4641                 MsgInfo *msginfo;
4642                 MsgPermFlags flags, oldflags;
4643                 gboolean wasnew;
4644
4645                 msginfo = (MsgInfo *) elem->data;
4646                 flags = msginfo->flags.perm_flags;
4647                 wasnew = (flags & MSG_NEW);
4648                 oldflags = flags & ~(MSG_NEW|MSG_UNREAD|MSG_REPLIED|MSG_FORWARDED|MSG_MARKED|MSG_DELETED|MSG_SPAM);
4649
4650                 if (folder->account && folder->account->low_bandwidth) {
4651                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
4652                                 flags &= ~((reverse_seen ? 0 : MSG_UNREAD | MSG_NEW) | MSG_REPLIED | MSG_FORWARDED | MSG_MARKED | MSG_SPAM);
4653                         } else {
4654                                 flags &= ~((reverse_seen ? 0 : MSG_UNREAD | MSG_NEW | MSG_MARKED));
4655                         }
4656                         if (reverse_seen)
4657                                 flags |= MSG_UNREAD | (wasnew ? MSG_NEW : 0);
4658                         if (gslist_find_next_num(&unseen, msginfo->msgnum) == msginfo->msgnum) {
4659                                 if (!reverse_seen) {
4660                                         flags |= MSG_UNREAD | (wasnew ? MSG_NEW : 0);
4661                                 } else {
4662                                         flags &= ~(MSG_UNREAD | MSG_NEW);
4663                                 }
4664                         }
4665
4666                         if (gslist_find_next_num(&flagged, msginfo->msgnum) == msginfo->msgnum)
4667                                 flags |= MSG_MARKED;
4668                         else
4669                                 flags &= ~MSG_MARKED;
4670
4671                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
4672                                 if (gslist_find_next_num(&answered, msginfo->msgnum) == msginfo->msgnum)
4673                                         flags |= MSG_REPLIED;
4674                                 else
4675                                         flags &= ~MSG_REPLIED;
4676                                 if (gslist_find_next_num(&forwarded, msginfo->msgnum) == msginfo->msgnum)
4677                                         flags |= MSG_FORWARDED;
4678                                 else
4679                                         flags &= ~MSG_FORWARDED;
4680                                 if (gslist_find_next_num(&spam, msginfo->msgnum) == msginfo->msgnum)
4681                                         flags |= MSG_SPAM;
4682                                 else
4683                                         flags &= ~MSG_SPAM;
4684                                 if (gslist_find_next_num(&deleted, msginfo->msgnum) == msginfo->msgnum)
4685                                         flags |= MSG_DELETED;
4686                                 else
4687                                         flags &= ~MSG_DELETED;
4688                         }
4689                 } else {
4690                         if (flags_hash != NULL) {
4691
4692                                 flags = GPOINTER_TO_INT(g_hash_table_lookup(flags_hash,
4693                                                 GINT_TO_POINTER(msginfo->msgnum)));
4694                         }
4695
4696                         if ((flags & MSG_UNREAD) == 0)
4697                                 flags &= ~MSG_NEW;
4698                         else if (wasnew)
4699                                 flags |= MSG_NEW;
4700                         flags |= oldflags;
4701
4702                         if (tags_hash != NULL) {
4703                                 GSList *tags = g_hash_table_lookup(tags_hash, GINT_TO_POINTER(msginfo->msgnum));
4704                                 GSList *cur;
4705
4706                                 if (tags != NULL) {
4707                                         g_slist_free(msginfo->tags);
4708                                         msginfo->tags = NULL;
4709                                 }
4710                                 for (cur = tags; cur; cur = cur->next) {
4711                                         gchar *real_tag = imap_modified_utf7_to_utf8(cur->data, TRUE);
4712                                         gint id = 0;
4713                                         id = tags_get_id_for_str(real_tag);
4714                                         if (id == -1) {
4715                                                 id = tags_add_tag(real_tag);
4716                                                 got_alien_tags = TRUE;
4717                                         }
4718                                         if (!g_slist_find(msginfo->tags, GINT_TO_POINTER(id))) {
4719                                                 msginfo->tags = g_slist_append(
4720                                                                 msginfo->tags,
4721                                                                 GINT_TO_POINTER(id));
4722                                         }
4723                                         g_free(real_tag);
4724                                 }
4725                                 slist_free_strings(tags);
4726                                 g_slist_free(tags);
4727                         }
4728                 }
4729
4730                 g_relation_insert(msgflags, msginfo, GINT_TO_POINTER(flags));
4731         }
4732
4733         if (got_alien_tags) {
4734                 tags_write_tags();
4735                 main_window_reflect_tags_changes(mainwindow_get_mainwindow());
4736         }
4737
4738         if (flags_hash)
4739                 g_hash_table_destroy(flags_hash);
4740         if (tags_hash)
4741                 g_hash_table_destroy(tags_hash);
4742
4743         imap_lep_set_free(seq_list);
4744         g_slist_free(flagged);
4745         g_slist_free(deleted);
4746         g_slist_free(answered);
4747         g_slist_free(forwarded);
4748         g_slist_free(spam);
4749         g_slist_free(unseen);
4750         g_slist_free(sorted_list);
4751
4752         stuff->done = TRUE;
4753         return GINT_TO_POINTER(0);
4754 }
4755
4756 static gint imap_get_flags(Folder *folder, FolderItem *item,
4757                            MsgInfoList *msginfo_list, GRelation *msgflags)
4758 {
4759         gint result;
4760         get_flags_data *data = g_new0(get_flags_data, 1);
4761         data->done = FALSE;
4762         data->folder = folder;
4763         data->item = item;
4764         data->msginfo_list = msginfo_list;
4765         data->msgflags = msgflags;
4766         data->full_search = FALSE;
4767
4768         GSList *tmp = NULL, *cur;
4769
4770         if (prefs_common.work_offline &&
4771             !inc_offline_should_override(FALSE,
4772                 _("Claws Mail needs network access in order "
4773                   "to access the IMAP server."))) {
4774                 g_free(data);
4775                 return -1;
4776         }
4777
4778         tmp = folder_item_get_msg_list(item);
4779
4780         if (g_slist_length(tmp) <= g_slist_length(msginfo_list))
4781                 data->full_search = TRUE;
4782
4783         for (cur = tmp; cur; cur = cur->next)
4784                 procmsg_msginfo_free((MsgInfo *)cur->data);
4785
4786         g_slist_free(tmp);
4787
4788         result = GPOINTER_TO_INT(imap_get_flags_thread(data));
4789
4790         g_free(data);
4791         return result;
4792
4793 }
4794
4795 static gboolean process_flags(gpointer key, gpointer value, gpointer user_data)
4796 {
4797         gboolean flags_set = GPOINTER_TO_INT(user_data);
4798         gint flags_value = GPOINTER_TO_INT(key);
4799         hashtable_data *data = (hashtable_data *)value;
4800         IMAPFolderItem *_item = data->item;
4801         FolderItem *item = (FolderItem *)_item;
4802         gint ok = MAILIMAP_ERROR_BAD_STATE;
4803         IMAPSession *session = NULL;
4804
4805         debug_print("getting session...\n");
4806         session = imap_session_get(item->folder);
4807
4808         data->msglist = g_slist_reverse(data->msglist);
4809
4810         debug_print("IMAP %ssetting flags to %d for %d messages\n",
4811                 flags_set?"":"un",
4812                 flags_value,
4813                 g_slist_length(data->msglist));
4814
4815         lock_session(session);
4816         if (session) {
4817                 ok = imap_select(session, IMAP_FOLDER(item->folder), item,
4818                          NULL, NULL, NULL, NULL, NULL, FALSE);
4819         }
4820         if (ok == MAILIMAP_NO_ERROR) {
4821                 ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item),
4822                         data->msglist, flags_value, NULL, flags_set);
4823         } else {
4824                 g_warning("can't select mailbox %s\n", item->path);
4825         }
4826
4827         if (!is_fatal(ok))
4828                 unlock_session(session);
4829
4830         g_slist_free(data->msglist);
4831         g_free(data);
4832         return TRUE;
4833 }
4834
4835 static gboolean process_tags(gpointer key, gpointer value, gpointer user_data)
4836 {
4837         gboolean tags_set = GPOINTER_TO_INT(user_data);
4838         TagsData *data = (TagsData *)value;
4839         IMAPFolderItem *_item = data->item;
4840         FolderItem *item = (FolderItem *)_item;
4841         gchar *str = data->str;
4842         gint ok = MAILIMAP_ERROR_BAD_STATE;
4843         IMAPSession *session = NULL;
4844
4845         debug_print("getting session...\n");
4846         session = imap_session_get(item->folder);
4847
4848         data->msglist = g_slist_reverse(data->msglist);
4849
4850         debug_print("IMAP %ssetting tags %s for %d messages\n",
4851                 tags_set?"":"un",
4852                 str,
4853                 g_slist_length(data->msglist));
4854
4855         lock_session(session);
4856         if (session) {
4857                 ok = imap_select(session, IMAP_FOLDER(item->folder), item,
4858                          NULL, NULL, NULL, NULL, NULL, FALSE);
4859         }
4860         if (ok == MAILIMAP_NO_ERROR) {
4861                 GSList list;
4862                 list.data = str;
4863                 list.next = NULL;
4864                 ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item),
4865                         data->msglist, 0, &list, tags_set);
4866         } else {
4867                 g_warning("can't select mailbox %s\n", item->path);
4868         }
4869
4870         if (!is_fatal(ok))
4871                 unlock_session(session);
4872
4873         g_slist_free(data->msglist);
4874         g_free(data->str);
4875         g_free(data);
4876         return TRUE;
4877 }
4878
4879 static void process_hashtable(IMAPFolderItem *item)
4880 {
4881         if (item->flags_set_table) {
4882                 g_hash_table_foreach_remove(item->flags_set_table, process_flags, GINT_TO_POINTER(TRUE));
4883                 g_hash_table_destroy(item->flags_set_table);
4884                 item->flags_set_table = NULL;
4885         }
4886         if (item->flags_unset_table) {
4887                 g_hash_table_foreach_remove(item->flags_unset_table, process_flags, GINT_TO_POINTER(FALSE));
4888                 g_hash_table_destroy(item->flags_unset_table);
4889                 item->flags_unset_table = NULL;
4890         }
4891         if (item->tags_set_table) {
4892                 g_hash_table_foreach_remove(item->tags_set_table, process_tags, GINT_TO_POINTER(TRUE));
4893                 g_hash_table_destroy(item->tags_set_table);
4894                 item->tags_set_table = NULL;
4895         }
4896         if (item->tags_unset_table) {
4897                 g_hash_table_foreach_remove(item->tags_unset_table, process_tags, GINT_TO_POINTER(FALSE));
4898                 g_hash_table_destroy(item->tags_unset_table);
4899                 item->tags_unset_table = NULL;
4900         }
4901
4902 }
4903
4904 static void imap_set_batch (Folder *folder, FolderItem *_item, gboolean batch)
4905 {
4906         IMAPFolderItem *item = (IMAPFolderItem *)_item;
4907         IMAPSession *session;
4908
4909         g_return_if_fail(item != NULL);
4910
4911         if (item->batching == batch)
4912                 return;
4913
4914         if (batch) {
4915                 item->batching = TRUE;
4916                 debug_print("IMAP switching to batch mode\n");
4917                 if (!item->flags_set_table) {
4918                         item->flags_set_table = g_hash_table_new(NULL, g_direct_equal);
4919                 }
4920                 if (!item->flags_unset_table) {
4921                         item->flags_unset_table = g_hash_table_new(NULL, g_direct_equal);
4922                 }
4923                 if (!item->tags_set_table) {
4924                         item->tags_set_table = g_hash_table_new(NULL, g_direct_equal);
4925                 }
4926                 if (!item->tags_unset_table) {
4927                         item->tags_unset_table = g_hash_table_new(NULL, g_direct_equal);
4928                 }
4929                 session = imap_session_get(folder);
4930                 if (session) {
4931                         imap_refresh_sensitivity(session);
4932                         session->sens_update_block = TRUE;
4933                 }
4934         } else {
4935                 debug_print("IMAP switching away from batch mode\n");
4936                 /* process stuff */
4937                 process_hashtable(item);
4938                 item->batching = FALSE;
4939                 session = imap_session_get(folder);
4940                 if (session) {
4941                         session->sens_update_block = FALSE;
4942                         imap_refresh_sensitivity(session);
4943                 }
4944         }
4945 }
4946
4947
4948
4949 /* data types conversion libetpan <-> claws */
4950
4951
4952
4953 #define ETPAN_IMAP_MB_MARKED      1
4954 #define ETPAN_IMAP_MB_UNMARKED    2
4955 #define ETPAN_IMAP_MB_NOSELECT    4
4956 #define ETPAN_IMAP_MB_NOINFERIORS 8
4957
4958 static int imap_flags_to_flags(struct mailimap_mbx_list_flags * imap_flags)
4959 {
4960   int flags;
4961   clistiter * cur;
4962
4963   flags = 0;
4964   if (imap_flags->mbf_type == MAILIMAP_MBX_LIST_FLAGS_SFLAG) {
4965     switch (imap_flags->mbf_sflag) {
4966     case MAILIMAP_MBX_LIST_SFLAG_MARKED:
4967       flags |= ETPAN_IMAP_MB_MARKED;
4968       break;
4969     case MAILIMAP_MBX_LIST_SFLAG_NOSELECT:
4970       flags |= ETPAN_IMAP_MB_NOSELECT;
4971       break;
4972     case MAILIMAP_MBX_LIST_SFLAG_UNMARKED:
4973       flags |= ETPAN_IMAP_MB_UNMARKED;
4974       break;
4975     }
4976   }
4977
4978   for(cur = clist_begin(imap_flags->mbf_oflags) ; cur != NULL ;
4979       cur = clist_next(cur)) {
4980     struct mailimap_mbx_list_oflag * oflag;
4981
4982     oflag = clist_content(cur);
4983
4984     switch (oflag->of_type) {
4985     case MAILIMAP_MBX_LIST_OFLAG_NOINFERIORS:
4986       flags |= ETPAN_IMAP_MB_NOINFERIORS;
4987       break;
4988     }
4989   }
4990
4991   return flags;
4992 }
4993
4994 static GSList * imap_list_from_lep(IMAPFolder * folder,
4995                                    clist * list, const gchar * real_path, gboolean all)
4996 {
4997         clistiter * iter;
4998         GSList * item_list = NULL, *llast = NULL;
4999
5000         for(iter = clist_begin(list) ; iter != NULL ;
5001             iter = clist_next(iter)) {
5002                 struct mailimap_mailbox_list * mb;
5003                 int flags;
5004                 char delimiter;
5005                 char * name;
5006                 char * dup_name;
5007                 gchar * base;
5008                 gchar * loc_name;
5009                 gchar * loc_path;
5010                 FolderItem *new_item;
5011
5012                 mb = clist_content(iter);
5013
5014                 if (mb == NULL)
5015                         continue;
5016
5017                 flags = 0;
5018                 if (mb->mb_flag != NULL)
5019                         flags = imap_flags_to_flags(mb->mb_flag);
5020
5021                 delimiter = mb->mb_delimiter;
5022                 name = mb->mb_name;
5023
5024                 dup_name = strdup(name);
5025                 if (delimiter != '\0')
5026                         subst_char(dup_name, delimiter, '/');
5027
5028                 base = g_path_get_basename(dup_name);
5029                 if (base[0] == '.') {
5030                         g_free(base);
5031                         free(dup_name);
5032                         continue;
5033                 }
5034                 if (!all && path_cmp(name, real_path) == 0) {
5035                         g_free(base);
5036                         free(dup_name);
5037                         continue;
5038                 }
5039
5040                 if (!all && dup_name[strlen(dup_name)-1] == '/') {
5041                         dup_name[strlen(dup_name)-1] = '\0';
5042                 }
5043
5044                 loc_name = imap_modified_utf7_to_utf8(base, FALSE);
5045                 loc_path = imap_modified_utf7_to_utf8(dup_name, FALSE);
5046
5047                 new_item = folder_item_new(FOLDER(folder), loc_name, loc_path);
5048                 if ((flags & ETPAN_IMAP_MB_NOINFERIORS) != 0)
5049                         new_item->no_sub = TRUE;
5050                 if (strcmp(dup_name, "INBOX") != 0 &&
5051                     ((flags & ETPAN_IMAP_MB_NOSELECT) != 0))
5052                         new_item->no_select = TRUE;
5053
5054                 if (item_list == NULL)
5055                         llast = item_list = g_slist_append(item_list, new_item);
5056                 else {
5057                         llast = g_slist_append(llast, new_item);
5058                         llast = llast->next;
5059                 }
5060                 debug_print("folder '%s' found.\n", loc_path);
5061                 g_free(base);
5062                 g_free(loc_path);
5063                 g_free(loc_name);
5064
5065                 free(dup_name);
5066         }
5067
5068         return item_list;
5069 }
5070
5071 static GSList * imap_get_lep_set_from_numlist(IMAPFolder *folder, MsgNumberList *numlist)
5072 {
5073         GSList *sorted_list, *cur;
5074         guint first, last, next;
5075         GSList *ret_list = NULL, *llast = NULL;
5076         struct mailimap_set * current_set;
5077         unsigned int item_count;
5078
5079         if (numlist == NULL)
5080                 return NULL;
5081
5082         current_set = mailimap_set_new_empty();
5083
5084         sorted_list = g_slist_copy(numlist);
5085         sorted_list = g_slist_sort(sorted_list, g_int_compare);
5086
5087         first = GPOINTER_TO_INT(sorted_list->data);
5088
5089         item_count = 0;
5090         for (cur = sorted_list; cur != NULL; cur = g_slist_next(cur)) {
5091                 if (GPOINTER_TO_INT(cur->data) == 0)
5092                         continue;
5093
5094                 item_count ++;
5095
5096                 last = GPOINTER_TO_INT(cur->data);
5097                 if (cur->next)
5098                         next = GPOINTER_TO_INT(cur->next->data);
5099                 else
5100                         next = 0;
5101
5102                 if (last + 1 != next || next == 0 || item_count >= folder->max_set_size) {
5103
5104                         struct mailimap_set_item * item;
5105                         item = mailimap_set_item_new(first, last);
5106                         mailimap_set_add(current_set, item);
5107
5108                         first = next;
5109
5110                         if (item_count >= folder->max_set_size) {
5111                                 if (ret_list == NULL)
5112                                         llast = ret_list = g_slist_append(ret_list,
5113                                                           current_set);
5114                                 else {
5115                                         llast = g_slist_append(llast, current_set);
5116                                         llast = llast->next;
5117                                 }
5118
5119                                 current_set = mailimap_set_new_empty();
5120                                 item_count = 0;
5121                         }
5122                 }
5123         }
5124
5125         if (clist_count(current_set->set_list) > 0) {
5126                 ret_list = g_slist_append(ret_list,
5127                                           current_set);
5128         }
5129
5130         g_slist_free(sorted_list);
5131
5132         return ret_list;
5133 }
5134
5135 static GSList * imap_get_lep_set_from_msglist(IMAPFolder *folder, MsgInfoList *msglist)
5136 {
5137         MsgNumberList *numlist = NULL;
5138         MsgInfoList *cur;
5139         GSList *seq_list;
5140
5141         for (cur = msglist; cur != NULL; cur = g_slist_next(cur)) {
5142                 MsgInfo *msginfo = (MsgInfo *) cur->data;
5143
5144                 numlist = g_slist_prepend(numlist, GINT_TO_POINTER(msginfo->msgnum));
5145         }
5146         numlist = g_slist_reverse(numlist);
5147         seq_list = imap_get_lep_set_from_numlist(folder, numlist);
5148         g_slist_free(numlist);
5149
5150         return seq_list;
5151 }
5152
5153 static GSList * imap_uid_list_from_lep(clist * list)
5154 {
5155         clistiter * iter;
5156         GSList * result;
5157
5158         result = NULL;
5159
5160         for(iter = clist_begin(list) ; iter != NULL ;
5161             iter = clist_next(iter)) {
5162                 uint32_t * puid;
5163
5164                 puid = clist_content(iter);
5165                 result = g_slist_prepend(result, GINT_TO_POINTER(* puid));
5166         }
5167
5168         result = g_slist_reverse(result);
5169         return result;
5170 }
5171
5172 static GSList * imap_uid_list_from_lep_tab(carray * list)
5173 {
5174         unsigned int i;
5175         GSList * result;
5176
5177         result = NULL;
5178
5179         for(i = 0 ; i < carray_count(list) ; i ++) {
5180                 uint32_t * puid;
5181
5182                 puid = carray_get(list, i);
5183                 result = g_slist_prepend(result, GINT_TO_POINTER(* puid));
5184         }
5185         result = g_slist_reverse(result);
5186         return result;
5187 }
5188
5189 static void imap_flags_hash_from_lep_uid_flags_tab(carray * list,
5190                                                    GHashTable * hash,
5191                                                    GHashTable * tags_hash)
5192 {
5193         unsigned int i;
5194         GSList * result;
5195
5196         result = NULL;
5197
5198         for(i = 0 ; i < carray_count(list) ; i += 3) {
5199                 uint32_t * puid;
5200                 int * pflags;
5201                 GSList *tags;
5202
5203                 puid = carray_get(list, i);
5204                 pflags = carray_get(list, i + 1);
5205                 tags = carray_get(list, i + 2);
5206
5207                 g_hash_table_insert(hash, GINT_TO_POINTER(*puid), GINT_TO_POINTER(* pflags));
5208                 g_hash_table_insert(tags_hash, GINT_TO_POINTER(*puid), tags);
5209         }
5210 }
5211
5212 static MsgInfo *imap_envelope_from_lep(struct imap_fetch_env_info * info,
5213                                        FolderItem *item)
5214 {
5215         MsgInfo *msginfo = NULL;
5216         guint32 uid = 0;
5217         goffset size = 0;
5218         MsgFlags flags = {0, 0};
5219
5220         if (info->headers == NULL)
5221                 return NULL;
5222
5223         MSG_SET_TMP_FLAGS(flags, MSG_IMAP);
5224         if (folder_has_parent_of_type(item, F_QUEUE)) {
5225                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
5226         } else if (folder_has_parent_of_type(item, F_DRAFT)) {
5227                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
5228         }
5229         flags.perm_flags = info->flags;
5230
5231         uid = info->uid;
5232         size = (goffset) info->size;
5233         msginfo = procheader_parse_str(info->headers, flags, FALSE, FALSE);
5234
5235         if (msginfo) {
5236                 msginfo->msgnum = uid;
5237                 msginfo->size = size;
5238         }
5239
5240         return msginfo;
5241 }
5242
5243 static void imap_lep_set_free(GSList *seq_list)
5244 {
5245         GSList * cur;
5246
5247         for(cur = seq_list ; cur != NULL ; cur = g_slist_next(cur)) {
5248                 struct mailimap_set * imapset;
5249
5250                 imapset = cur->data;
5251                 mailimap_set_free(imapset);
5252         }
5253         g_slist_free(seq_list);
5254 }
5255
5256 static struct mailimap_flag_list * imap_flag_to_lep(IMAPFolderItem *item, IMAPFlags flags, GSList *tags)
5257 {
5258         struct mailimap_flag_list * flag_list;
5259         GSList *cur = tags;
5260
5261         flag_list = mailimap_flag_list_new_empty();
5262
5263         if (IMAP_IS_SEEN(flags))
5264                 mailimap_flag_list_add(flag_list,
5265                                        mailimap_flag_new_seen());
5266         if (IMAP_IS_ANSWERED(flags))
5267                 mailimap_flag_list_add(flag_list,
5268                                        mailimap_flag_new_answered());
5269         if (IMAP_IS_FLAGGED(flags))
5270                 mailimap_flag_list_add(flag_list,
5271                                        mailimap_flag_new_flagged());
5272         if (IMAP_IS_DELETED(flags))
5273                 mailimap_flag_list_add(flag_list,
5274                                        mailimap_flag_new_deleted());
5275         if (IMAP_IS_DRAFT(flags))
5276                 mailimap_flag_list_add(flag_list,
5277                                        mailimap_flag_new_draft());
5278         if (IMAP_IS_FORWARDED(flags) && flag_ok(item, IMAP_FLAG_FORWARDED))
5279                 mailimap_flag_list_add(flag_list,
5280                                        mailimap_flag_new_flag_keyword(strdup("$Forwarded")));
5281         if (IMAP_IS_SPAM(flags) && flag_ok(item, IMAP_FLAG_SPAM))
5282                 mailimap_flag_list_add(flag_list,
5283                                        mailimap_flag_new_flag_keyword(strdup("Junk")));
5284         else if (IMAP_IS_HAM(flags) && flag_ok(item, IMAP_FLAG_HAM))
5285                 mailimap_flag_list_add(flag_list,
5286                                        mailimap_flag_new_flag_keyword(strdup("NonJunk")));
5287
5288         for (; cur; cur = cur->next) {
5289                 gchar *enc_str =
5290                         imap_utf8_to_modified_utf7(cur->data, TRUE);
5291                 g_strstrip(enc_str);
5292
5293                 mailimap_flag_list_add(flag_list,
5294                         mailimap_flag_new_flag_keyword(enc_str));
5295         }
5296
5297         return flag_list;
5298 }
5299
5300 guint imap_folder_get_refcnt(Folder *folder)
5301 {
5302         return ((IMAPFolder *)folder)->refcnt;
5303 }
5304
5305 void imap_folder_ref(Folder *folder)
5306 {
5307         ((IMAPFolder *)folder)->refcnt++;
5308 }
5309
5310 void imap_disconnect_all(void)
5311 {
5312         GList *list;
5313         gboolean short_timeout;
5314 #ifdef HAVE_NETWORKMANAGER_SUPPORT
5315         GError *error;
5316 #endif
5317
5318 #ifdef HAVE_NETWORKMANAGER_SUPPORT
5319         error = NULL;
5320         short_timeout = !networkmanager_is_online(&error);
5321         if(error) {
5322                 short_timeout = TRUE;
5323                 g_error_free(error);
5324         }
5325 #else
5326         short_timeout = TRUE;
5327 #endif
5328
5329         if(short_timeout)
5330                 imap_main_set_timeout(1);
5331
5332         for (list = account_get_list(); list != NULL; list = list->next) {
5333                 PrefsAccount *account = list->data;
5334                 if (account->protocol == A_IMAP4) {
5335                         RemoteFolder *folder = (RemoteFolder *)account->folder;
5336                         if (folder && folder->session) {
5337                                 IMAPSession *session = (IMAPSession *)folder->session;
5338                                 imap_threaded_disconnect(FOLDER(folder));
5339                                 SESSION(session)->state = SESSION_DISCONNECTED;
5340                                 SESSION(session)->sock = NULL;
5341                                 session_destroy(SESSION(session));
5342                                 folder->session = NULL;
5343                         }
5344                 }
5345         }
5346
5347         if(short_timeout)
5348                 imap_main_set_timeout(prefs_common.io_timeout_secs);
5349 }
5350
5351 void imap_folder_unref(Folder *folder)
5352 {
5353         if (((IMAPFolder *)folder)->refcnt > 0)
5354                 ((IMAPFolder *)folder)->refcnt--;
5355 }
5356
5357 void imap_cancel_all(void)
5358 {
5359         GList *folderlist;
5360         GList *cur;
5361
5362         folderlist = folder_get_list();
5363         for (cur = folderlist; cur != NULL; cur = g_list_next(cur)) {
5364                 Folder *folder = (Folder *) cur->data;
5365
5366                 if (folder->klass == &imap_class) {
5367                         if (imap_is_busy(folder)) {
5368                                 IMAPSession *imap_session;
5369                                 RemoteFolder *rfolder;
5370
5371                                 g_printerr("cancelled\n");
5372                                 imap_threaded_cancel(folder);
5373                                 rfolder = (RemoteFolder *) folder;
5374                                 imap_session = (IMAPSession *) rfolder->session;
5375                                 if (imap_session)
5376                                         imap_session->cancelled = 1;
5377                         }
5378                 }
5379         }
5380 }
5381
5382 gboolean imap_cancel_all_enabled(void)
5383 {
5384         GList *folderlist;
5385         GList *cur;
5386
5387         folderlist = folder_get_list();
5388         for (cur = folderlist; cur != NULL; cur = g_list_next(cur)) {
5389                 Folder *folder = (Folder *) cur->data;
5390
5391                 if (folder->klass == &imap_class) {
5392                         if (imap_is_busy(folder)) {
5393                                 return TRUE;
5394                         }
5395                 }
5396         }
5397
5398         return FALSE;
5399 }
5400
5401 static gboolean imap_is_busy(Folder *folder)
5402 {
5403         IMAPSession *imap_session;
5404         RemoteFolder *rfolder;
5405
5406         rfolder = (RemoteFolder *) folder;
5407         imap_session = (IMAPSession *) rfolder->session;
5408         if (imap_session == NULL)
5409                 return FALSE;
5410
5411         return imap_session->busy;
5412 }
5413
5414 #else /* HAVE_LIBETPAN */
5415
5416 static FolderClass imap_class;
5417
5418 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item);
5419 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag);
5420
5421 static Folder   *imap_folder_new        (const gchar    *name,
5422                                          const gchar    *path)
5423 {
5424         static gboolean missing_imap_warning = TRUE;
5425         if (missing_imap_warning) {
5426                 missing_imap_warning = FALSE;
5427                 alertpanel_error(
5428                         _("You have one or more IMAP accounts "
5429                           "defined. However this version of "
5430                           "Claws Mail has been built without "
5431                           "IMAP support; your IMAP account(s) are "
5432                           "disabled.\n\n"
5433                           "You probably need to "
5434                           "install libetpan and recompile "
5435                           "Claws Mail."));
5436         }
5437         return NULL;
5438 }
5439 static gint     imap_create_tree        (Folder         *folder)
5440 {
5441         return -1;
5442 }
5443 static FolderItem *imap_create_folder   (Folder         *folder,
5444                                          FolderItem     *parent,
5445                                          const gchar    *name)
5446 {
5447         return NULL;
5448 }
5449 static gint     imap_rename_folder      (Folder         *folder,
5450                                          FolderItem     *item,
5451                                          const gchar    *name)
5452 {
5453         return -1;
5454 }
5455
5456 gchar imap_get_path_separator_for_item(FolderItem *item)
5457 {
5458         return '/';
5459 }
5460
5461 FolderClass *imap_get_class(void)
5462 {
5463         if (imap_class.idstr == NULL) {
5464                 imap_class.type = F_IMAP;
5465                 imap_class.idstr = "imap";
5466                 imap_class.uistr = "IMAP4";
5467
5468                 imap_class.new_folder = imap_folder_new;
5469                 imap_class.create_tree = imap_create_tree;
5470                 imap_class.create_folder = imap_create_folder;
5471                 imap_class.rename_folder = imap_rename_folder;
5472
5473                 imap_class.set_xml = folder_set_xml;
5474                 imap_class.get_xml = folder_get_xml;
5475                 imap_class.item_set_xml = imap_item_set_xml;
5476                 imap_class.item_get_xml = imap_item_get_xml;
5477                 /* nothing implemented */
5478         }
5479
5480         return &imap_class;
5481 }
5482
5483 void imap_disconnect_all(void)
5484 {
5485 }
5486
5487 gint imap_subscribe(Folder *folder, FolderItem *item, gchar *rpath, gboolean sub)
5488 {
5489         return -1;
5490 }
5491
5492 GList * imap_scan_subtree(Folder *folder, FolderItem *item, gboolean unsubs_only, gboolean recursive)
5493 {
5494         return NULL;
5495 }
5496
5497 void imap_cache_msg(FolderItem *item, gint msgnum)
5498 {
5499 }
5500
5501 void imap_cancel_all(void)
5502 {
5503 }
5504
5505 gboolean imap_cancel_all_enabled(void)
5506 {
5507         return FALSE;
5508 }
5509
5510 #endif
5511
5512 #ifdef HAVE_LIBETPAN
5513 static void imap_synchronise(FolderItem *item, gint days)
5514 {
5515         if (IMAP_FOLDER_ITEM(item)->last_sync == IMAP_FOLDER_ITEM(item)->last_change) {
5516                 debug_print("%s already synced\n", item->path?item->path:item->name);
5517                 return;
5518         }
5519         debug_print("syncing %s\n", item->path?item->path:item->name);
5520         imap_gtk_synchronise(item, days);
5521         IMAP_FOLDER_ITEM(item)->last_sync = IMAP_FOLDER_ITEM(item)->last_change;
5522 }
5523 #endif
5524
5525 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag)
5526 {
5527 #ifdef HAVE_LIBETPAN
5528         GList *cur;
5529 #endif
5530         folder_item_set_xml(folder, item, tag);
5531
5532 #ifdef HAVE_LIBETPAN
5533         for (cur = tag->attr; cur != NULL; cur = g_list_next(cur)) {
5534                 XMLAttr *attr = (XMLAttr *) cur->data;
5535
5536                 if (!attr || !attr->name || !attr->value) continue;
5537                 if (!strcmp(attr->name, "uidnext"))
5538                         IMAP_FOLDER_ITEM(item)->uid_next = atoi(attr->value);
5539                 if (!strcmp(attr->name, "last_sync"))
5540                         IMAP_FOLDER_ITEM(item)->last_sync = atoi(attr->value);
5541                 if (!strcmp(attr->name, "last_change"))
5542                         IMAP_FOLDER_ITEM(item)->last_change = atoi(attr->value);
5543         }
5544         if (IMAP_FOLDER_ITEM(item)->last_change == 0)
5545                 IMAP_FOLDER_ITEM(item)->last_change = time(NULL);
5546 #endif
5547 }
5548
5549 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item)
5550 {
5551         XMLTag *tag;
5552
5553         tag = folder_item_get_xml(folder, item);
5554
5555 #ifdef HAVE_LIBETPAN
5556         xml_tag_add_attr(tag, xml_attr_new_int("uidnext",
5557                         IMAP_FOLDER_ITEM(item)->uid_next));
5558         xml_tag_add_attr(tag, xml_attr_new_int("last_sync",
5559                         IMAP_FOLDER_ITEM(item)->last_sync));
5560         xml_tag_add_attr(tag, xml_attr_new_int("last_change",
5561                         IMAP_FOLDER_ITEM(item)->last_change));
5562
5563 #endif
5564         return tag;
5565 }
5566
5567 /* ===================================================================
5568  * UTF-7 conversion routines as in RFC 2192
5569  * ===================================================================
5570  * These two functions from:
5571  * libimap library.
5572  * Copyright (C) 2003-2004 Pawel Salek. */
5573
5574 /* UTF7 modified base64 alphabet */
5575 static char base64chars[] =
5576   "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+,";
5577 #define UNDEFINED 64
5578
5579 /* UTF16 definitions */
5580 #define UTF16MASK       0x03FFUL
5581 #define UTF16SHIFT      10
5582 #define UTF16BASE       0x10000UL
5583 #define UTF16HIGHSTART  0xD800UL
5584 #define UTF16HIGHEND    0xDBFFUL
5585 #define UTF16LOSTART    0xDC00UL
5586 #define UTF16LOEND      0xDFFFUL
5587
5588
5589 /* Convert an IMAP mailbox to a UTF-8 string.
5590  *  dst needs to have roughly 4 times the storage space of src
5591  *    Hex encoding can triple the size of the input
5592  *    UTF-7 can be slightly denser than UTF-8
5593  *     (worst case: 8 octets UTF-7 becomes 9 octets UTF-8)
5594  */
5595 char* imap_modified_utf7_to_utf8(const char *mbox, gboolean change_spaces)
5596 {
5597   unsigned c, i, bitcount;
5598   unsigned long ucs4, utf16, bitbuf;
5599   unsigned char base64[256];
5600   const char *src;
5601   char *dst, *res  = malloc(2*strlen(mbox)+1);
5602
5603   bitbuf = 0;
5604   dst = res;
5605   src = mbox;
5606   if(!dst) return NULL;
5607   /* initialize modified base64 decoding table */
5608   memset(base64, UNDEFINED, sizeof (base64));
5609   for (i = 0; i < sizeof (base64chars); ++i) {
5610     base64[(unsigned)base64chars[i]] = i;
5611   }
5612
5613   /* loop until end of string */
5614   while (*src != '\0') {
5615     c = *src++;
5616     /* deal with literal characters and &- */
5617     if (c != '&' || *src == '-') {
5618       /* encode literally */
5619       if (change_spaces && c == '_')
5620         *dst++ = ' ';
5621       else
5622         *dst++ = c;
5623       /* skip over the '-' if this is an &- sequence */
5624       if (c == '&') ++src;
5625     } else {
5626       /* convert modified UTF-7 -> UTF-16 -> UCS-4 -> UTF-8 -> HEX */
5627       bitbuf = 0;
5628       bitcount = 0;
5629       ucs4 = 0;
5630       while ((c = base64[(unsigned char) *src]) != UNDEFINED) {
5631         ++src;
5632         bitbuf = (bitbuf << 6) | c;
5633         bitcount += 6;
5634         /* enough bits for a UTF-16 character? */
5635         if (bitcount >= 16) {
5636           bitcount -= 16;
5637           utf16 = (bitcount ? bitbuf >> bitcount
5638                    : bitbuf) & 0xffff;
5639           /* convert UTF16 to UCS4 */
5640           if
5641             (utf16 >= UTF16HIGHSTART && utf16 <= UTF16HIGHEND) {
5642             ucs4 = (utf16 - UTF16HIGHSTART) << UTF16SHIFT;
5643             continue;
5644           } else if
5645             (utf16 >= UTF16LOSTART && utf16 <= UTF16LOEND) {
5646             ucs4 += utf16 - UTF16LOSTART + UTF16BASE;
5647           } else {
5648             ucs4 = utf16;
5649           }
5650
5651           /* convert UTF-16 range of UCS4 to UTF-8 */
5652           if (ucs4 <= 0x7fUL) {
5653             dst[0] = ucs4;
5654             dst += 1;
5655           } else if (ucs4 <= 0x7ffUL) {
5656             dst[0] = 0xc0 | (ucs4 >> 6);
5657             dst[1] = 0x80 | (ucs4 & 0x3f);
5658             dst += 2;
5659           } else if (ucs4 <= 0xffffUL) {
5660             dst[0] = 0xe0 | (ucs4 >> 12);
5661             dst[1] = 0x80 | ((ucs4 >> 6) & 0x3f);
5662             dst[2] = 0x80 | (ucs4 & 0x3f);
5663             dst += 3;
5664           } else {
5665             dst[0] = 0xf0 | (ucs4 >> 18);
5666             dst[1] = 0x80 | ((ucs4 >> 12) & 0x3f);
5667             dst[2] = 0x80 | ((ucs4 >> 6) & 0x3f);
5668             dst[3] = 0x80 | (ucs4 & 0x3f);
5669             dst += 4;
5670           }
5671         }
5672       }
5673       /* skip over trailing '-' in modified UTF-7 encoding */
5674       if (*src == '-') ++src;
5675     }
5676   }
5677   /* terminate destination string */
5678   *dst = '\0';
5679   return res;
5680 }
5681
5682 /* Convert hex coded UTF-8 string to modified UTF-7 IMAP mailbox
5683  *  dst should be about twice the length of src to deal with non-hex
5684  *  coded URLs
5685  */
5686 char* imap_utf8_to_modified_utf7(const char *src, gboolean change_spaces)
5687 {
5688   unsigned int utf8pos, utf8total, c, utf7mode, bitstogo, utf16flag;
5689   unsigned long ucs4 = 0, bitbuf = 0;
5690
5691   /* initialize hex lookup table */
5692   char *dst, *res = malloc(2*strlen(src)+1);
5693   dst = res;
5694   if(!dst) return NULL;
5695
5696   utf7mode = 0;
5697   utf8total = 0;
5698   bitstogo = 0;
5699   utf8pos = 0;
5700   while ((c = (unsigned char)*src) != '\0') {
5701     ++src;
5702     /* normal character? */
5703     if (c >= ' ' && c <= '~' && (c != '_' || !change_spaces)) {
5704       /* switch out of UTF-7 mode */
5705       if (utf7mode) {
5706         if (bitstogo) {
5707           *dst++ = base64chars[(bitbuf << (6 - bitstogo)) & 0x3F];
5708         }
5709         *dst++ = '-';
5710         utf7mode = 0;
5711         utf8pos  = 0;
5712         bitstogo = 0;
5713         utf8total= 0;
5714       }
5715       if (change_spaces && c == ' ')
5716         *dst++ = '_';
5717       else
5718         *dst++ = c;
5719       /* encode '&' as '&-' */
5720       if (c == '&') {
5721         *dst++ = '-';
5722       }
5723       continue;
5724     }
5725     /* switch to UTF-7 mode */
5726     if (!utf7mode) {
5727       *dst++ = '&';
5728       utf7mode = 1;
5729     }
5730     /* Encode US-ASCII characters as themselves */
5731     if (c < 0x80) {
5732       ucs4 = c;
5733       utf8total = 1;
5734     } else if (utf8total) {
5735       /* save UTF8 bits into UCS4 */
5736       ucs4 = (ucs4 << 6) | (c & 0x3FUL);
5737       if (++utf8pos < utf8total) {
5738         continue;
5739       }
5740     } else {
5741       utf8pos = 1;
5742       if (c < 0xE0) {
5743         utf8total = 2;
5744         ucs4 = c & 0x1F;
5745       } else if (c < 0xF0) {
5746         utf8total = 3;
5747         ucs4 = c & 0x0F;
5748       } else {
5749         /* NOTE: can't convert UTF8 sequences longer than 4 */
5750         utf8total = 4;
5751         ucs4 = c & 0x03;
5752       }
5753       continue;
5754     }
5755     /* loop to split ucs4 into two utf16 chars if necessary */
5756     utf8total = 0;
5757     do {
5758       if (ucs4 >= UTF16BASE) {
5759         ucs4 -= UTF16BASE;
5760         bitbuf = (bitbuf << 16) | ((ucs4 >> UTF16SHIFT)
5761                                    + UTF16HIGHSTART);
5762         ucs4 = (ucs4 & UTF16MASK) + UTF16LOSTART;
5763         utf16flag = 1;
5764       } else {
5765         bitbuf = (bitbuf << 16) | ucs4;
5766         utf16flag = 0;
5767       }
5768       bitstogo += 16;
5769       /* spew out base64 */
5770       while (bitstogo >= 6) {
5771         bitstogo -= 6;
5772         *dst++ = base64chars[(bitstogo ? (bitbuf >> bitstogo)
5773                               : bitbuf)
5774                              & 0x3F];
5775       }
5776     } while (utf16flag);
5777   }
5778   /* if in UTF-7 mode, finish in ASCII */
5779   if (utf7mode) {
5780     if (bitstogo) {
5781       *dst++ = base64chars[(bitbuf << (6 - bitstogo)) & 0x3F];
5782     }
5783     *dst++ = '-';
5784   }
5785   /* tie off string */
5786   *dst = '\0';
5787   return res;
5788 }