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