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                                 printf("tag %s %d\n", real_tag, id);
2898                                 if (id == -1) {
2899                                         id = tags_add_tag(real_tag);
2900                                         got_alien_tags = TRUE;
2901                                 }
2902                                 if (!g_slist_find(msginfo->tags, GINT_TO_POINTER(id))) {
2903                                         msginfo->tags = g_slist_append(
2904                                                         msginfo->tags,
2905                                                         GINT_TO_POINTER(id));
2906                                 }
2907                                 g_free(real_tag);
2908                         }
2909                         slist_free_strings(tags);
2910                         g_slist_free(tags);
2911                         msginfo->folder = item;
2912                         if (!newlist)
2913                                 llast = newlist = g_slist_append(newlist, msginfo);
2914                         else {
2915                                 llast = g_slist_append(llast, msginfo);
2916                                 llast = llast->next;
2917                         }
2918                         count ++;
2919                 }
2920
2921                 imap_fetch_env_free(env_list);
2922         }
2923
2924         if (got_alien_tags) {
2925                 tags_write_tags();
2926                 main_window_reflect_tags_changes(mainwindow_get_mainwindow());
2927         }
2928
2929         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
2930                 struct mailimap_set * imapset;
2931
2932                 imapset = cur->data;
2933                 mailimap_set_free(imapset);
2934         }
2935
2936         session_set_access_time(SESSION(session));
2937         stuff->done = TRUE;
2938         return newlist;
2939 }
2940
2941 #define MAX_MSG_NUM 50
2942
2943 static GSList *imap_get_uncached_messages(IMAPSession *session,
2944                                         FolderItem *item,
2945                                         MsgNumberList *numlist,
2946                                         int *r)
2947 {
2948         GSList *result = NULL;
2949         GSList * cur;
2950         uncached_data *data = g_new0(uncached_data, 1);
2951         int finished;
2952
2953         finished = 0;
2954         cur = numlist;
2955         data->total = g_slist_length(numlist);
2956         data->ok = MAILIMAP_NO_ERROR;
2957         debug_print("messages list : %i\n", data->total);
2958
2959         while (cur != NULL) {
2960                 GSList * partial_result;
2961                 int count;
2962                 GSList * newlist;
2963                 GSList * llast;
2964
2965                 llast = NULL;
2966                 count = 0;
2967                 newlist = NULL;
2968                 while (count < MAX_MSG_NUM) {
2969                         void * p;
2970
2971                         p = cur->data;
2972
2973                         if (newlist == NULL)
2974                                 llast = newlist = g_slist_append(newlist, p);
2975                         else {
2976                                 llast = g_slist_append(llast, p);
2977                                 llast = llast->next;
2978                         }
2979                         count ++;
2980
2981                         cur = cur->next;
2982                         if (cur == NULL)
2983                                 break;
2984                 }
2985
2986                 data->done = FALSE;
2987                 data->session = session;
2988                 data->item = item;
2989                 data->numlist = newlist;
2990                 data->cur += count;
2991
2992                 if (prefs_common.work_offline &&
2993                     !inc_offline_should_override(FALSE,
2994                         _("Claws Mail needs network access in order "
2995                           "to access the IMAP server."))) {
2996                         g_free(data);
2997                         return NULL;
2998                 }
2999
3000                 partial_result =
3001                         (GSList *)imap_get_uncached_messages_thread(data);
3002                 *r = data->ok;
3003                 if (data->ok != MAILIMAP_NO_ERROR) {
3004                         goto bail;
3005                 }
3006                 statusbar_progress_all(data->cur,data->total, 1);
3007
3008                 g_slist_free(newlist);
3009
3010                 result = g_slist_concat(result, partial_result);
3011         }
3012 bail:
3013         g_free(data);
3014
3015         statusbar_progress_all(0,0,0);
3016         statusbar_pop_all();
3017
3018         return result;
3019 }
3020
3021 static void imap_delete_all_cached_messages(FolderItem *item)
3022 {
3023         gchar *dir;
3024
3025         g_return_if_fail(item != NULL);
3026         g_return_if_fail(item->folder != NULL);
3027         g_return_if_fail(FOLDER_CLASS(item->folder) == &imap_class);
3028
3029         debug_print("Deleting all cached messages...\n");
3030
3031         dir = folder_item_get_path(item);
3032         if (is_dir_exist(dir))
3033                 remove_all_numbered_files(dir);
3034         g_free(dir);
3035
3036         debug_print("done.\n");
3037 }
3038
3039 gchar imap_get_path_separator_for_item(FolderItem *item)
3040 {
3041         Folder *folder = NULL;
3042         IMAPFolder *imap_folder = NULL;
3043         IMAPSession *session = NULL;
3044         gchar result = '/';
3045
3046         if (!item)
3047                 return '/';
3048         folder = item->folder;
3049
3050         if (!folder)
3051                 return '/';
3052
3053         imap_folder = IMAP_FOLDER(folder);
3054
3055         if (!imap_folder)
3056                 return '/';
3057
3058         debug_print("getting session...");
3059         session = imap_session_get(FOLDER(folder));
3060         result = imap_get_path_separator(session, imap_folder, item->path);
3061         return result;
3062 }
3063
3064 static gchar imap_refresh_path_separator(IMAPSession *session, IMAPFolder *folder, const gchar *subfolder)
3065 {
3066         clist * lep_list;
3067         int r;
3068         gchar separator = '\0';
3069
3070         g_return_val_if_fail(session != NULL, '/');
3071         r = imap_threaded_list((Folder *)folder, "", subfolder, &lep_list);
3072
3073         if (r != MAILIMAP_NO_ERROR) {
3074                 imap_handle_error(SESSION(session), r);
3075                 log_warning(LOG_PROTOCOL, _("LIST failed\n"));
3076                 return '\0';
3077         }
3078
3079         if (clist_count(lep_list) > 0) {
3080                 clistiter * iter = clist_begin(lep_list);
3081                 struct mailimap_mailbox_list * mb;
3082                 mb = clist_content(iter);
3083
3084                 separator = mb->mb_delimiter;
3085                 debug_print("got separator: %c\n", folder->last_seen_separator);
3086         }
3087         mailimap_list_result_free(lep_list);
3088         return separator;
3089 }
3090
3091 static gchar imap_get_path_separator(IMAPSession *session, IMAPFolder *folder, const gchar *path)
3092 {
3093         gchar separator = '/';
3094
3095         if (folder->last_seen_separator == 0) {
3096                 folder->last_seen_separator = imap_refresh_path_separator(session, folder, "");
3097         }
3098
3099         if (folder->last_seen_separator == 0) {
3100                 folder->last_seen_separator = imap_refresh_path_separator(session, folder, "INBOX");
3101         }
3102
3103         if (folder->last_seen_separator != 0) {
3104                 debug_print("using separator: %c\n", folder->last_seen_separator);
3105                 return folder->last_seen_separator;
3106         }
3107
3108         return separator;
3109 }
3110
3111 static gchar *imap_get_real_path(IMAPSession *session, IMAPFolder *folder, const gchar *path)
3112 {
3113         gchar *real_path;
3114         gchar separator;
3115
3116         g_return_val_if_fail(folder != NULL, NULL);
3117         g_return_val_if_fail(path != NULL, NULL);
3118
3119         real_path = imap_utf8_to_modified_utf7(path, FALSE);
3120         separator = imap_get_path_separator(session, folder, path);
3121         imap_path_separator_subst(real_path, separator);
3122
3123         return real_path;
3124 }
3125
3126 static gint imap_set_message_flags(IMAPSession *session,
3127                                    IMAPFolderItem *item,
3128                                    MsgNumberList *numlist,
3129                                    IMAPFlags flags,
3130                                    GSList *tags,
3131                                    gboolean is_set)
3132 {
3133         gint ok = 0;
3134         GSList *seq_list;
3135         GSList * cur;
3136         gint total = 0;
3137         IMAPFolder *folder = NULL;
3138         GSList *sorted_list = NULL;
3139
3140         if (numlist == NULL || session == NULL)
3141                 return MAILIMAP_ERROR_BAD_STATE;
3142
3143         folder = IMAP_FOLDER(session->folder);
3144
3145         sorted_list = g_slist_copy(numlist);
3146         sorted_list = g_slist_sort(sorted_list, g_int_compare);
3147
3148         cur = g_slist_last(sorted_list);
3149
3150         if (cur)
3151                 total = GPOINTER_TO_INT(cur->data);
3152
3153         seq_list = imap_get_lep_set_from_numlist(IMAP_FOLDER(session->folder), sorted_list);
3154
3155         statusbar_print_all(_("Flagging messages..."));
3156
3157         for(cur = seq_list ; cur != NULL ; cur = g_slist_next(cur)) {
3158                 struct mailimap_set * imapset = (struct mailimap_set *)cur->data;
3159                 struct mailimap_set_item *set_item = clist_content(
3160                                                         clist_begin(imapset->set_list));
3161
3162                 statusbar_progress_all(set_item->set_first, total, 1);
3163
3164                 ok = imap_cmd_store(session, item, imapset,
3165                                     flags, tags, is_set);
3166                 statusbar_progress_all(set_item->set_last, total, 1);
3167                 if (ok != MAILIMAP_NO_ERROR && folder->max_set_size > 20) {
3168                         /* reduce max set size */
3169                         folder->max_set_size /= 2;
3170                 }
3171                 if (ok != MAILIMAP_NO_ERROR && is_fatal(ok)) {
3172                         break;
3173                 }
3174         }
3175
3176         g_slist_free(sorted_list);
3177
3178         statusbar_progress_all(0,0,0);
3179         statusbar_pop_all();
3180
3181         imap_lep_set_free(seq_list);
3182
3183         return ok;
3184 }
3185
3186 typedef struct _select_data {
3187         IMAPSession *session;
3188         gchar *real_path;
3189         gint *exists;
3190         gint *recent;
3191         gint *unseen;
3192         guint32 *uid_validity;
3193         gboolean done;
3194 } select_data;
3195
3196 static gint imap_select(IMAPSession *session, IMAPFolder *folder,
3197                         FolderItem *item,
3198                         gint *exists, gint *recent, gint *unseen,
3199                         guint32 *uid_validity, gint *can_create_flags,
3200                         gboolean block)
3201 {
3202         gchar *real_path;
3203         gint ok;
3204         gint exists_, recent_, unseen_;
3205         guint32 uid_validity_;
3206         gint can_create_flags_;
3207         const gchar *path = item ? item->path:NULL;
3208
3209         if (!item) {
3210                 return MAILIMAP_ERROR_BAD_STATE;
3211         }
3212
3213         if (!exists && !recent && !unseen && !uid_validity && !can_create_flags) {
3214                 if (session->mbox && strcmp(session->mbox, path) == 0)
3215                         return MAILIMAP_NO_ERROR;
3216         }
3217         if (!exists && !recent && !unseen && !uid_validity && can_create_flags) {
3218                 if (session->mbox && strcmp(session->mbox, path) == 0) {
3219                         if (IMAP_FOLDER_ITEM(item)->can_create_flags != ITEM_CAN_CREATE_FLAGS_UNKNOWN)
3220                                 return MAILIMAP_NO_ERROR;
3221                 }
3222         }
3223         if (!exists)
3224                 exists = &exists_;
3225         if (!recent)
3226                 recent = &recent_;
3227         if (!unseen)
3228                 unseen = &unseen_;
3229         if (!uid_validity)
3230                 uid_validity = &uid_validity_;
3231         if (!can_create_flags)
3232                 can_create_flags = &can_create_flags_;
3233
3234         g_free(session->mbox);
3235         session->mbox = NULL;
3236         session->exists = 0;
3237         session->recent = 0;
3238         session->expunge = 0;
3239
3240         real_path = imap_get_real_path(session, folder, path);
3241
3242         g_slist_free(IMAP_FOLDER_ITEM(item)->ok_flags);
3243         IMAP_FOLDER_ITEM(item)->ok_flags = NULL;
3244         ok = imap_cmd_select(session, real_path,
3245                              exists, recent, unseen, uid_validity, can_create_flags,
3246                              &(IMAP_FOLDER_ITEM(item)->ok_flags), block);
3247         if (ok != MAILIMAP_NO_ERROR) {
3248                 log_warning(LOG_PROTOCOL, _("can't select folder: %s\n"), real_path);
3249         } else {
3250                 session->mbox = g_strdup(path);
3251                 session->folder_content_changed = FALSE;
3252                 session->exists = *exists;
3253                 session->recent = *recent;
3254                 session->expunge = 0;
3255                 session->unseen = *unseen;
3256                 session->uid_validity = *uid_validity;
3257                 debug_print("select: exists %d recent %d expunge %d uid_validity %d can_create_flags %d\n",
3258                         session->exists, session->recent, session->expunge,
3259                         session->uid_validity, *can_create_flags);
3260         }
3261         if (*can_create_flags) {
3262                 IMAP_FOLDER_ITEM(item)->can_create_flags = ITEM_CAN_CREATE_FLAGS;
3263         } else {
3264                 IMAP_FOLDER_ITEM(item)->can_create_flags = ITEM_CANNOT_CREATE_FLAGS;
3265         }
3266         g_free(real_path);
3267
3268         return ok;
3269 }
3270
3271 static gint imap_status(IMAPSession *session, IMAPFolder *folder,
3272                         const gchar *path, IMAPFolderItem *item,
3273                         gint *messages,
3274                         guint32 *uid_next, guint32 *uid_validity,
3275                         gint *unseen, gboolean block)
3276 {
3277         int r;
3278         clistiter * iter;
3279         struct mailimap_mailbox_data_status * data_status;
3280         int got_values;
3281         gchar *real_path;
3282         guint mask = 0;
3283
3284         real_path = imap_get_real_path(session, folder, path);
3285
3286         if (messages) {
3287                 mask |= 1 << 0;
3288                 *messages = 0;
3289         }
3290         if (uid_next) {
3291                 mask |= 1 << 2;
3292                 *uid_next = 0;
3293         }
3294         if (uid_validity) {
3295                 mask |= 1 << 3;
3296                 *uid_validity = 0;
3297         }
3298         if (unseen) {
3299                 mask |= 1 << 4;
3300                 *unseen = 0;
3301         }
3302
3303         if (session->mbox != NULL &&
3304             !strcmp(session->mbox, item->item.path)) {
3305                 r = imap_cmd_close(session);
3306                 if (r != MAILIMAP_NO_ERROR) {
3307                         imap_handle_error(SESSION(session), r);
3308                         debug_print("close err %d\n", r);
3309                         return r;
3310                 }
3311         }
3312
3313         r = imap_threaded_status(FOLDER(folder), real_path,
3314                 &data_status, mask);
3315
3316         g_free(real_path);
3317         if (r != MAILIMAP_NO_ERROR) {
3318                 imap_handle_error(SESSION(session), r);
3319                 debug_print("status err %d\n", r);
3320                 return r;
3321         }
3322
3323         if (data_status->st_info_list == NULL) {
3324                 mailimap_mailbox_data_status_free(data_status);
3325                 debug_print("status->st_info_list == NULL\n");
3326                 return MAILIMAP_ERROR_BAD_STATE;
3327         }
3328
3329         got_values = 0;
3330         for(iter = clist_begin(data_status->st_info_list) ; iter != NULL ;
3331             iter = clist_next(iter)) {
3332                 struct mailimap_status_info * info;
3333
3334                 info = clist_content(iter);
3335                 switch (info->st_att) {
3336                 case MAILIMAP_STATUS_ATT_MESSAGES:
3337                         if (messages) {
3338                                 * messages = info->st_value;
3339                                 got_values |= 1 << 0;
3340                         }
3341                         break;
3342
3343                 case MAILIMAP_STATUS_ATT_UIDNEXT:
3344                         if (uid_next) {
3345                                 * uid_next = info->st_value;
3346                                 got_values |= 1 << 2;
3347                         }
3348                         break;
3349
3350                 case MAILIMAP_STATUS_ATT_UIDVALIDITY:
3351                         if (uid_validity) {
3352                                 * uid_validity = info->st_value;
3353                                 got_values |= 1 << 3;
3354                         }
3355                         break;
3356
3357                 case MAILIMAP_STATUS_ATT_UNSEEN:
3358                         if (unseen) {
3359                                 * unseen = info->st_value;
3360                                 got_values |= 1 << 4;
3361                         }
3362                         break;
3363                 }
3364         }
3365         mailimap_mailbox_data_status_free(data_status);
3366
3367         if (got_values != mask) {
3368                 g_warning("status: incomplete values received (%d)\n", got_values);
3369         }
3370         return MAILIMAP_NO_ERROR;
3371 }
3372
3373 static void imap_free_capabilities(IMAPSession *session)
3374 {
3375         slist_free_strings(session->capability);
3376         g_slist_free(session->capability);
3377         session->capability = NULL;
3378 }
3379
3380 /* low-level IMAP4rev1 commands */
3381
3382 static gint imap_cmd_login(IMAPSession *session,
3383                            const gchar *user, const gchar *pass,
3384                            const gchar *type)
3385 {
3386         int r;
3387         gint ok;
3388
3389         if (!strcmp(type, "LOGIN") && imap_has_capability(session, "LOGINDISABLED")) {
3390                 gint ok = MAILIMAP_ERROR_BAD_STATE;
3391                 if (imap_has_capability(session, "STARTTLS")) {
3392 #if (defined(USE_OPENSSL) || defined (USE_GNUTLS))
3393                         log_warning(LOG_PROTOCOL, _("Server requires TLS to log in.\n"));
3394                         ok = imap_cmd_starttls(session);
3395                         if (ok != MAILIMAP_NO_ERROR) {
3396                                 log_warning(LOG_PROTOCOL, _("Can't start TLS session.\n"));
3397                                 return ok;
3398                         } else {
3399                                 /* refresh capas */
3400                                 imap_free_capabilities(session);
3401                                 if ((r = imap_get_capabilities(session)) != MAILIMAP_NO_ERROR) {
3402                                         imap_handle_error(SESSION(session), r);
3403                                         log_warning(LOG_PROTOCOL, _("Can't refresh capabilities.\n"));
3404                                         return r;
3405                                 }
3406                         }
3407 #else
3408                         log_error(LOG_PROTOCOL, _("Connection to %s failed: "
3409                                         "server requires TLS, but Claws Mail "
3410                                         "has been compiled without OpenSSL "
3411                                         "support.\n"),
3412                                         SESSION(session)->server);
3413                         return MAILIMAP_ERROR_BAD_STATE;
3414 #endif
3415                 } else {
3416                         log_error(LOG_PROTOCOL, _("Server logins are disabled.\n"));
3417                         return MAILIMAP_ERROR_BAD_STATE;
3418                 }
3419         }
3420
3421         log_print(LOG_PROTOCOL, "IMAP4> Logging %s to %s using %s\n",
3422                         user,
3423                         SESSION(session)->server,
3424                         type);
3425         r = imap_threaded_login(session->folder, user, pass, type);
3426         if (r != MAILIMAP_NO_ERROR) {
3427                 imap_handle_error(SESSION(session), r);
3428                 log_print(LOG_PROTOCOL, "IMAP4< Error logging in to %s\n",
3429                                 SESSION(session)->server);
3430                 ok = r;
3431         } else {
3432                 log_print(LOG_PROTOCOL, "IMAP4< Login to %s successful\n",
3433                                 SESSION(session)->server);
3434                 ok = MAILIMAP_NO_ERROR;
3435         }
3436         return ok;
3437 }
3438
3439 static gint imap_cmd_noop(IMAPSession *session)
3440 {
3441         int r;
3442         unsigned int exists, recent, expunge, unseen, uidnext, uidval;
3443
3444         r = imap_threaded_noop(session->folder, &exists, &recent, &expunge, &unseen, &uidnext, &uidval);
3445         if (r != MAILIMAP_NO_ERROR) {
3446                 imap_handle_error(SESSION(session), r);
3447                 debug_print("noop err %d\n", r);
3448                 return r;
3449         }
3450
3451         session->folder_content_changed = FALSE;
3452
3453         if ((exists && exists != session->exists)
3454          || (recent && recent != session->recent)
3455          || (expunge && expunge != session->expunge)
3456          || (unseen && unseen != session->unseen)) {
3457                 session->folder_content_changed = TRUE;
3458         }
3459         if (uidnext != 0 && uidnext != session->uid_next) {
3460                 session->uid_next = uidnext;
3461                 session->folder_content_changed = TRUE;
3462         }
3463         if (uidval != 0 && uidval != session->uid_validity) {
3464                 session->uid_validity = uidval;
3465                 session->folder_content_changed = TRUE;
3466         }
3467
3468         session->exists = exists;
3469         session->recent = recent;
3470         session->expunge = expunge;
3471         session->unseen = unseen;
3472
3473         session_set_access_time(SESSION(session));
3474
3475         return MAILIMAP_NO_ERROR;
3476 }
3477
3478 #if (defined(USE_OPENSSL) || defined (USE_GNUTLS))
3479 static gint imap_cmd_starttls(IMAPSession *session)
3480 {
3481         int r;
3482
3483         r = imap_threaded_starttls(session->folder,
3484                 SESSION(session)->server, SESSION(session)->port);
3485         if (r != MAILIMAP_NO_ERROR) {
3486                 imap_handle_error(SESSION(session), r);
3487                 debug_print("starttls err %d\n", r);
3488                 return r;
3489         }
3490         return MAILIMAP_NO_ERROR;
3491 }
3492 #endif
3493
3494 static gint imap_cmd_select(IMAPSession *session, const gchar *folder,
3495                             gint *exists, gint *recent, gint *unseen,
3496                             guint32 *uid_validity, gint *can_create_flags,
3497                             GSList **ok_flags, gboolean block)
3498 {
3499         int r;
3500
3501         r = imap_threaded_select(session->folder, folder,
3502                                  exists, recent, unseen, uid_validity, can_create_flags, ok_flags);
3503         if (r != MAILIMAP_NO_ERROR) {
3504                 imap_handle_error(SESSION(session), r);
3505                 debug_print("select err %d\n", r);
3506                 return r;
3507         }
3508         return MAILIMAP_NO_ERROR;
3509 }
3510
3511 static gint imap_cmd_close(IMAPSession *session)
3512 {
3513         int r;
3514
3515         r = imap_threaded_close(session->folder);
3516         if (r != MAILIMAP_NO_ERROR) {
3517                 imap_handle_error(SESSION(session), r);
3518                 debug_print("close err %d\n", r);
3519                 return r;
3520         }
3521         g_free(session->mbox);
3522         session->mbox = NULL;
3523         session->exists = 0;
3524         session->recent = 0;
3525         session->expunge = 0;
3526         return MAILIMAP_NO_ERROR;
3527 }
3528
3529 static gint imap_cmd_examine(IMAPSession *session, const gchar *folder,
3530                              gint *exists, gint *recent, gint *unseen,
3531                              guint32 *uid_validity, gboolean block)
3532 {
3533         int r;
3534
3535         r = imap_threaded_examine(session->folder, folder,
3536                                   exists, recent, unseen, uid_validity);
3537         if (r != MAILIMAP_NO_ERROR) {
3538                 imap_handle_error(SESSION(session), r);
3539                 debug_print("examine err %d\n", r);
3540
3541                 return r;
3542         }
3543         return MAILIMAP_NO_ERROR;
3544 }
3545
3546 static gint imap_cmd_create(IMAPSession *session, const gchar *folder)
3547 {
3548         int r;
3549
3550         r = imap_threaded_create(session->folder, folder);
3551         if (r != MAILIMAP_NO_ERROR) {
3552                 imap_handle_error(SESSION(session), r);
3553
3554                 return r;
3555         }
3556
3557         return MAILIMAP_NO_ERROR;
3558 }
3559
3560 static gint imap_cmd_rename(IMAPSession *session, const gchar *old_folder,
3561                             const gchar *new_folder)
3562 {
3563         int r;
3564
3565         r = imap_threaded_rename(session->folder, old_folder,
3566                                  new_folder);
3567         if (r != MAILIMAP_NO_ERROR) {
3568                 imap_handle_error(SESSION(session), r);
3569                 return r;
3570         }
3571
3572         return MAILIMAP_NO_ERROR;
3573 }
3574
3575 static gint imap_cmd_delete(IMAPSession *session, const gchar *folder)
3576 {
3577         int r;
3578
3579
3580         r = imap_threaded_delete(session->folder, folder);
3581         if (r != MAILIMAP_NO_ERROR) {
3582                 imap_handle_error(SESSION(session), r);
3583                 return r;
3584         }
3585
3586         return MAILIMAP_NO_ERROR;
3587 }
3588
3589 typedef struct _fetch_data {
3590         IMAPSession *session;
3591         guint32 uid;
3592         const gchar *filename;
3593         gboolean headers;
3594         gboolean body;
3595         gboolean done;
3596 } fetch_data;
3597
3598 static void *imap_cmd_fetch_thread(void *data)
3599 {
3600         fetch_data *stuff = (fetch_data *)data;
3601         IMAPSession *session = stuff->session;
3602         guint32 uid = stuff->uid;
3603         const gchar *filename = stuff->filename;
3604         int r;
3605
3606         if (stuff->body) {
3607                 r = imap_threaded_fetch_content(session->folder,
3608                                                uid, 1, filename);
3609         }
3610         else {
3611                 r = imap_threaded_fetch_content(session->folder,
3612                                                 uid, 0, filename);
3613         }
3614         if (r != MAILIMAP_NO_ERROR) {
3615                 imap_handle_error(SESSION(session), r);
3616                 debug_print("fetch err %d\n", r);
3617                 return GINT_TO_POINTER(MAILIMAP_ERROR_BAD_STATE);
3618         }
3619         return GINT_TO_POINTER(MAILIMAP_NO_ERROR);
3620 }
3621
3622 static gint imap_cmd_fetch(IMAPSession *session, guint32 uid,
3623                                 const gchar *filename, gboolean headers,
3624                                 gboolean body)
3625 {
3626         fetch_data *data = g_new0(fetch_data, 1);
3627         int result = 0;
3628         data->done = FALSE;
3629         data->session = session;
3630         data->uid = uid;
3631         data->filename = filename;
3632         data->headers = headers;
3633         data->body = body;
3634
3635         if (prefs_common.work_offline &&
3636             !inc_offline_should_override(FALSE,
3637                 _("Claws Mail needs network access in order "
3638                   "to access the IMAP server."))) {
3639                 g_free(data);
3640                 return -1;
3641         }
3642         statusbar_print_all(_("Fetching message..."));
3643         result = GPOINTER_TO_INT(imap_cmd_fetch_thread(data));
3644         statusbar_pop_all();
3645         g_free(data);
3646         return result;
3647 }
3648
3649
3650 static gint imap_cmd_append(IMAPSession *session,
3651                             IMAPFolderItem *item,
3652                             const gchar *destfolder,
3653                             const gchar *file, IMAPFlags flags,
3654                             guint32 *new_uid)
3655 {
3656         struct mailimap_flag_list * flag_list;
3657         int r;
3658
3659         g_return_val_if_fail(file != NULL, MAILIMAP_ERROR_BAD_STATE);
3660
3661         flag_list = imap_flag_to_lep(item, flags, NULL);
3662         lock_session(session);
3663         r = imap_threaded_append(session->folder, destfolder,
3664                          file, flag_list, (int *)new_uid);
3665         mailimap_flag_list_free(flag_list);
3666
3667         if (r != MAILIMAP_NO_ERROR) {
3668                 imap_handle_error(SESSION(session), r);
3669                 debug_print("append err %d\n", r);
3670                 return r;
3671         }
3672
3673         unlock_session(session);
3674
3675         return MAILIMAP_NO_ERROR;
3676 }
3677
3678 static gint imap_cmd_copy(IMAPSession *session, struct mailimap_set * set,
3679                           const gchar *destfolder, GRelation *uid_mapping,
3680                           struct mailimap_set **source, struct mailimap_set **dest)
3681 {
3682         int r;
3683
3684         g_return_val_if_fail(session != NULL, MAILIMAP_ERROR_BAD_STATE);
3685         g_return_val_if_fail(set != NULL, MAILIMAP_ERROR_BAD_STATE);
3686         g_return_val_if_fail(destfolder != NULL, MAILIMAP_ERROR_BAD_STATE);
3687
3688         r = imap_threaded_copy(session->folder, set, destfolder, source, dest);
3689         if (r != MAILIMAP_NO_ERROR) {
3690                 imap_handle_error(SESSION(session), r);
3691                 return r;
3692         }
3693
3694         return MAILIMAP_NO_ERROR;
3695 }
3696
3697 static gint imap_cmd_store(IMAPSession *session,
3698                            IMAPFolderItem *item,
3699                            struct mailimap_set * set,
3700                            IMAPFlags flags, GSList *tags, int do_add)
3701 {
3702         int r;
3703         struct mailimap_flag_list * flag_list = NULL;
3704         struct mailimap_store_att_flags * store_att_flags;
3705
3706         flag_list = imap_flag_to_lep(item, flags, tags);
3707
3708         if (do_add)
3709                 store_att_flags =
3710                         mailimap_store_att_flags_new_add_flags_silent(flag_list);
3711         else
3712                 store_att_flags =
3713                         mailimap_store_att_flags_new_remove_flags_silent(flag_list);
3714
3715         r = imap_threaded_store(session->folder, set, store_att_flags);
3716         mailimap_store_att_flags_free(store_att_flags);
3717         if (r != MAILIMAP_NO_ERROR) {
3718                 imap_handle_error(SESSION(session), r);
3719                 return r;
3720         }
3721
3722         return MAILIMAP_NO_ERROR;
3723 }
3724
3725 static gint imap_cmd_expunge(IMAPSession *session)
3726 {
3727         int r;
3728
3729         if (prefs_common.work_offline &&
3730             !inc_offline_should_override(FALSE,
3731                 _("Claws Mail needs network access in order "
3732                   "to access the IMAP server."))) {
3733                 return -1;
3734         }
3735
3736         r = imap_threaded_expunge(session->folder);
3737         if (r != MAILIMAP_NO_ERROR) {
3738                 imap_handle_error(SESSION(session), r);
3739                 return r;
3740         }
3741
3742         return MAILIMAP_NO_ERROR;
3743 }
3744
3745 static void imap_path_separator_subst(gchar *str, gchar separator)
3746 {
3747         gchar *p;
3748         gboolean in_escape = FALSE;
3749
3750         if (!separator || separator == '/') return;
3751
3752         for (p = str; *p != '\0'; p++) {
3753                 if (*p == '/' && !in_escape)
3754                         *p = separator;
3755                 else if (*p == '&' && *(p + 1) != '-' && !in_escape)
3756                         in_escape = TRUE;
3757                 else if (*p == '-' && in_escape)
3758                         in_escape = FALSE;
3759         }
3760 }
3761
3762 static gboolean imap_rename_folder_func(GNode *node, gpointer data)
3763 {
3764         FolderItem *item = node->data;
3765         gchar **paths = data;
3766         const gchar *oldpath = paths[0];
3767         const gchar *newpath = paths[1];
3768         gchar *real_oldpath, *real_newpath;
3769         gchar *base;
3770         gchar *new_itempath;
3771         gint oldpathlen;
3772         IMAPSession *session = imap_session_get(item->folder);
3773
3774         oldpathlen = strlen(oldpath);
3775         if (strncmp(oldpath, item->path, oldpathlen) != 0) {
3776                 g_warning("path doesn't match: %s, %s\n", oldpath, item->path);
3777                 return TRUE;
3778         }
3779
3780         base = item->path + oldpathlen;
3781         while (*base == G_DIR_SEPARATOR) base++;
3782         if (*base == '\0')
3783                 new_itempath = g_strdup(newpath);
3784         else
3785                 new_itempath = g_strconcat(newpath, G_DIR_SEPARATOR_S, base,
3786                                            NULL);
3787
3788         real_oldpath = imap_get_real_path(session, IMAP_FOLDER(item->folder), item->path);
3789         g_free(item->path);
3790         item->path = new_itempath;
3791
3792         real_newpath = imap_get_real_path(session, IMAP_FOLDER(item->folder), item->path);
3793
3794         imap_threaded_subscribe(item->folder, real_oldpath, FALSE);
3795         imap_threaded_subscribe(item->folder, real_newpath, TRUE);
3796
3797         g_free(real_oldpath);
3798         g_free(real_newpath);
3799         return FALSE;
3800 }
3801
3802 static gint get_list_of_uids(IMAPSession *session, Folder *folder, IMAPFolderItem *item, GSList **msgnum_list)
3803 {
3804         GSList *uidlist, *elem;
3805         int r = -1;
3806         clist * lep_uidlist;
3807         gint ok, nummsgs = 0, lastuid_old;
3808
3809         if (session == NULL) {
3810                 return -1;
3811         }
3812
3813         ok = imap_select(session, IMAP_FOLDER(folder), FOLDER_ITEM(item),
3814                          NULL, NULL, NULL, NULL, NULL, TRUE);
3815         if (ok != MAILIMAP_NO_ERROR) {
3816                 return -1;
3817         }
3818
3819         g_slist_free(item->uid_list);
3820         item->uid_list = NULL;
3821
3822         uidlist = NULL;
3823
3824         if (folder->account && folder->account->low_bandwidth) {
3825                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SIMPLE, NULL,
3826                                  &lep_uidlist);
3827         }
3828
3829         if (r == MAILIMAP_NO_ERROR) {
3830                 GSList * fetchuid_list =
3831                         imap_uid_list_from_lep(lep_uidlist);
3832                 mailimap_search_result_free(lep_uidlist);
3833
3834                 uidlist = g_slist_concat(fetchuid_list, uidlist);
3835         } else {
3836                 carray * lep_uidtab;
3837                 if (r != -1) { /* inited */
3838                         imap_handle_error(SESSION(session), r);
3839                         if (is_fatal(r))
3840                                 return -1;
3841                 }
3842                 r = imap_threaded_fetch_uid(folder, 1,
3843                                     &lep_uidtab);
3844                 if (r == MAILIMAP_NO_ERROR) {
3845                         GSList * fetchuid_list =
3846                                 imap_uid_list_from_lep_tab(lep_uidtab);
3847                         imap_fetch_uid_list_free(lep_uidtab);
3848                         uidlist = g_slist_concat(fetchuid_list, uidlist);
3849                 }
3850         }
3851
3852         if (r != MAILIMAP_NO_ERROR) {
3853                 imap_handle_error(SESSION(session), r);
3854                 return -1;
3855         }
3856
3857         lastuid_old = item->lastuid;
3858
3859         for (elem = uidlist; elem != NULL; elem = g_slist_next(elem)) {
3860                 guint msgnum;
3861
3862                 msgnum = GPOINTER_TO_INT(elem->data);
3863
3864                 *msgnum_list = g_slist_prepend(*msgnum_list, GINT_TO_POINTER(msgnum));
3865                 item->uid_list = g_slist_prepend(item->uid_list, GINT_TO_POINTER(msgnum));
3866                 nummsgs++;
3867         }
3868         g_slist_free(uidlist);
3869
3870         unlock_session(session); /* locked from imap_get_num_list */
3871
3872         return nummsgs;
3873
3874 }
3875
3876 gint imap_get_num_list(Folder *folder, FolderItem *_item, GSList **msgnum_list, gboolean *old_uids_valid)
3877 {
3878         IMAPFolderItem *item = (IMAPFolderItem *)_item;
3879         IMAPSession *session;
3880         gint nummsgs;
3881         GSList *uidlist = NULL;
3882         gchar *dir;
3883         gboolean selected_folder;
3884         gint known_list_len = 0;
3885         debug_print("get_num_list\n");
3886
3887         g_return_val_if_fail(folder != NULL, -1);
3888         g_return_val_if_fail(item != NULL, -1);
3889         g_return_val_if_fail(item->item.path != NULL, -1);
3890         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
3891         g_return_val_if_fail(folder->account != NULL, -1);
3892
3893         known_list_len = g_slist_length(item->uid_list);
3894         if (!item->should_update) {
3895                 debug_print("get_num_list: nothing to update\n");
3896                 *old_uids_valid = TRUE;
3897                 if (known_list_len == item->item.total_msgs
3898                  && known_list_len > 0) {
3899                         *msgnum_list = g_slist_copy(item->uid_list);
3900                         return known_list_len;
3901                 } else {
3902                         debug_print("don't know the list length...\n");
3903                 }
3904         }
3905
3906         if (prefs_common.work_offline &&
3907             !inc_offline_should_override(FALSE,
3908                 _("Claws Mail needs network access in order "
3909                   "to access the IMAP server."))) {
3910                 return -1;
3911         }
3912
3913         debug_print("getting session...\n");
3914         session = imap_session_get(folder);
3915         g_return_val_if_fail(session != NULL, -1);
3916
3917         lock_session(session); /* unlocked by get_list_of_uids */
3918         if (FOLDER_ITEM(item)->path)
3919                 statusbar_print_all(_("Scanning folder %s%c%s ..."),
3920                                       FOLDER_ITEM(item)->folder->name,
3921                                       G_DIR_SEPARATOR,
3922                                       FOLDER_ITEM(item)->path);
3923         else
3924                 statusbar_print_all(_("Scanning folder %s ..."),
3925                                       FOLDER_ITEM(item)->folder->name);
3926
3927         selected_folder = (session->mbox != NULL) &&
3928                           (!strcmp(session->mbox, item->item.path));
3929
3930         if (item->should_trash_cache) {
3931                 *old_uids_valid = FALSE;
3932                 debug_print("get_num_list: trashing num list\n");
3933                 debug_print("Freeing imap uid cache\n");
3934                 item->lastuid = 0;
3935                 g_slist_free(item->uid_list);
3936                 item->uid_list = NULL;
3937
3938                 imap_delete_all_cached_messages((FolderItem *)item);
3939         } else {
3940                 debug_print("get_num_list: updating num list\n");
3941                 *old_uids_valid = TRUE;
3942         }
3943
3944         nummsgs = get_list_of_uids(session, folder, item, &uidlist);
3945         /* session could be broken now, in case of fatal error */
3946
3947         debug_print("get_num_list: got %d msgs\n", nummsgs);
3948
3949         if (nummsgs < 0) {
3950                 statusbar_pop_all();
3951                 return -1;
3952         }
3953
3954         *msgnum_list = uidlist;
3955
3956         dir = folder_item_get_path((FolderItem *)item);
3957         debug_print("removing old messages from %s\n", dir);
3958         remove_numbered_files_not_in_list(dir, *msgnum_list);
3959         g_free(dir);
3960
3961         debug_print("get_num_list - ok - %i\n", nummsgs);
3962         statusbar_pop_all();
3963         item->should_trash_cache = FALSE;
3964         item->should_update = FALSE;
3965         return nummsgs;
3966 }
3967
3968 static MsgInfo *imap_parse_msg(const gchar *file, FolderItem *item)
3969 {
3970         MsgInfo *msginfo;
3971         MsgFlags flags;
3972
3973         flags.perm_flags = MSG_NEW|MSG_UNREAD;
3974         flags.tmp_flags = 0;
3975
3976         g_return_val_if_fail(item != NULL, NULL);
3977         g_return_val_if_fail(file != NULL, NULL);
3978
3979         if (folder_has_parent_of_type(item, F_QUEUE)) {
3980                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
3981         } else if (folder_has_parent_of_type(item, F_DRAFT)) {
3982                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
3983         }
3984
3985         msginfo = procheader_parse_file(file, flags, FALSE, FALSE);
3986         if (!msginfo) return NULL;
3987
3988         msginfo->plaintext_file = g_strdup(file);
3989         msginfo->folder = item;
3990
3991         return msginfo;
3992 }
3993
3994 GSList *imap_get_msginfos(Folder *folder, FolderItem *item,
3995                           GSList *msgnum_list)
3996 {
3997         IMAPSession *session;
3998         MsgInfoList *ret = NULL;
3999         gint ok;
4000
4001         debug_print("get_msginfos\n");
4002
4003         g_return_val_if_fail(folder != NULL, NULL);
4004         g_return_val_if_fail(item != NULL, NULL);
4005         g_return_val_if_fail(msgnum_list != NULL, NULL);
4006
4007         debug_print("getting session...\n");
4008         session = imap_session_get(folder);
4009         g_return_val_if_fail(session != NULL, NULL);
4010
4011         lock_session(session); /* unlocked later in the function */
4012
4013         debug_print("IMAP getting msginfos\n");
4014         ok = imap_select(session, IMAP_FOLDER(folder), item,
4015                          NULL, NULL, NULL, NULL, NULL, FALSE);
4016         if (ok != MAILIMAP_NO_ERROR) {
4017                 return NULL;
4018         }
4019         if (!(folder_has_parent_of_type(item, F_DRAFT) ||
4020               folder_has_parent_of_type(item, F_QUEUE))) {
4021                 ret = g_slist_concat(ret,
4022                         imap_get_uncached_messages(session, item,
4023                                                    msgnum_list, &ok));
4024                 if (ok != MAILIMAP_NO_ERROR)
4025                         return NULL;
4026                 unlock_session(session);
4027         } else {
4028                 MsgNumberList *sorted_list, *elem, *llast = NULL;
4029                 gint startnum, lastnum;
4030
4031                 unlock_session(session);
4032
4033                 sorted_list = g_slist_sort(g_slist_copy(msgnum_list), g_int_compare);
4034
4035                 startnum = lastnum = GPOINTER_TO_INT(sorted_list->data);
4036
4037                 llast = g_slist_last(ret);
4038                 for (elem = sorted_list;; elem = g_slist_next(elem)) {
4039                         guint num = 0;
4040
4041                         if (elem)
4042                                 num = GPOINTER_TO_INT(elem->data);
4043
4044                         if (num > lastnum + 1 || elem == NULL) {
4045                                 int i;
4046                                 for (i = startnum; i <= lastnum; ++i) {
4047                                         gchar *file;
4048                                         file = imap_fetch_msg(folder, item, i);
4049                                         if (file != NULL) {
4050                                                 MsgInfo *msginfo = imap_parse_msg(file, item);
4051                                                 if (msginfo != NULL) {
4052                                                         msginfo->msgnum = i;
4053                                                         if (llast == NULL)
4054                                                                 llast = ret = g_slist_append(ret, msginfo);
4055                                                         else {
4056                                                                 llast = g_slist_append(llast, msginfo);
4057                                                                 llast = llast->next;
4058                                                         }
4059                                                 }
4060                                                 g_free(file);
4061                                         }
4062                                 }
4063
4064                                 if (elem == NULL)
4065                                         break;
4066
4067                                 startnum = num;
4068                         }
4069                         lastnum = num;
4070                 }
4071
4072                 g_slist_free(sorted_list);
4073         }
4074         return ret;
4075 }
4076
4077 MsgInfo *imap_get_msginfo(Folder *folder, FolderItem *item, gint uid)
4078 {
4079         MsgInfo *msginfo = NULL;
4080         MsgInfoList *msginfolist;
4081         MsgNumberList numlist;
4082
4083         numlist.next = NULL;
4084         numlist.data = GINT_TO_POINTER(uid);
4085
4086         msginfolist = imap_get_msginfos(folder, item, &numlist);
4087         if (msginfolist != NULL) {
4088                 msginfo = msginfolist->data;
4089                 g_slist_free(msginfolist);
4090         }
4091
4092         return msginfo;
4093 }
4094
4095 gboolean imap_scan_required(Folder *folder, FolderItem *_item)
4096 {
4097         IMAPSession *session;
4098         IMAPFolderItem *item = (IMAPFolderItem *)_item;
4099         gint ok, exists = 0, unseen = 0;
4100         guint32 uid_next = 0, uid_val = 0;
4101         gboolean selected_folder;
4102
4103         g_return_val_if_fail(folder != NULL, FALSE);
4104         g_return_val_if_fail(item != NULL, FALSE);
4105         g_return_val_if_fail(item->item.folder != NULL, FALSE);
4106         g_return_val_if_fail(FOLDER_CLASS(item->item.folder) == &imap_class, FALSE);
4107
4108         if (item->item.path == NULL)
4109                 return FALSE;
4110
4111         if (item->should_update) {
4112                 debug_print("scan already required\n");
4113                 return TRUE;
4114         }
4115         debug_print("getting session...\n");
4116         session = imap_session_get(folder);
4117
4118         g_return_val_if_fail(session != NULL, FALSE);
4119         lock_session(session); /* unlocked later in the function */
4120
4121         selected_folder = (session->mbox != NULL) &&
4122                           (!strcmp(session->mbox, item->item.path));
4123         if (selected_folder) {
4124                 if (!session->folder_content_changed) {
4125                         ok = imap_cmd_noop(session);
4126                         if (ok != MAILIMAP_NO_ERROR) {
4127                                 debug_print("disconnected!\n");
4128                                 if (!is_fatal(ok))
4129                                         session = imap_reconnect_if_possible(folder, session);
4130                                 else
4131                                         session = imap_session_get(folder);
4132                                 if (session == NULL)
4133                                         return FALSE;
4134                         }
4135
4136                         if (session->folder_content_changed) {
4137                                 debug_print("CHANGED (self-noop)! scan_required\n");
4138                                 item->should_update = TRUE;
4139                                 if (session->uid_validity && session->uid_validity != item->item.mtime) {
4140                                         item->item.mtime = session->uid_validity;
4141                                         item->should_trash_cache = TRUE;
4142                                 }
4143                                 unlock_session(session);
4144                                 return TRUE;
4145                         }
4146                 } else {
4147                         debug_print("CHANGED (previous noop)! scan_required\n");
4148                         item->should_update = TRUE;
4149                         if (session->uid_validity && session->uid_validity != item->item.mtime) {
4150                                 item->item.mtime = session->uid_validity;
4151                                 item->should_trash_cache = TRUE;
4152                         }
4153                         unlock_session(session);
4154                         return TRUE;
4155                 }
4156         } else {
4157                 ok = imap_status(session, IMAP_FOLDER(folder), item->item.path, IMAP_FOLDER_ITEM(item),
4158                                  &exists, &uid_next, &uid_val, &unseen, FALSE);
4159                 if (ok != MAILIMAP_NO_ERROR) {
4160                         return FALSE;
4161                 }
4162
4163                 debug_print("exists %d, item->item.total_msgs %d\n",
4164                         exists, item->item.total_msgs);
4165                 if (exists != item->item.total_msgs
4166                     || unseen != item->item.unread_msgs
4167                     || uid_next != item->uid_next
4168                     || uid_val != item->item.mtime) {
4169                         debug_print("CHANGED (status)! scan_required\n");
4170                         item->last_change = time(NULL);
4171                         item->should_update = TRUE;
4172                         item->uid_next = uid_next;
4173                         if (uid_val != item->item.mtime) {
4174                                 item->item.mtime = uid_val;
4175                                 item->should_trash_cache = TRUE;
4176                         }
4177                         unlock_session(session);
4178                         return TRUE;
4179                 }
4180         }
4181         unlock_session(session);
4182
4183         item->should_update = FALSE;
4184         return FALSE;
4185 }
4186
4187 void imap_change_flags(Folder *folder, FolderItem *item, MsgInfo *msginfo, MsgPermFlags newflags)
4188 {
4189         IMAPSession *session;
4190         IMAPFlags flags_set = 0, flags_unset = 0;
4191         gint ok = MAILIMAP_NO_ERROR;
4192         MsgNumberList numlist;
4193         hashtable_data *ht_data = NULL;
4194
4195         g_return_if_fail(folder != NULL);
4196         g_return_if_fail(folder->klass == &imap_class);
4197         g_return_if_fail(item != NULL);
4198         g_return_if_fail(item->folder == folder);
4199         g_return_if_fail(msginfo != NULL);
4200         g_return_if_fail(msginfo->folder == item);
4201
4202         if (!MSG_IS_MARKED(msginfo->flags) &&  (newflags & MSG_MARKED))
4203                 flags_set |= IMAP_FLAG_FLAGGED;
4204         if ( MSG_IS_MARKED(msginfo->flags) && !(newflags & MSG_MARKED))
4205                 flags_unset |= IMAP_FLAG_FLAGGED;
4206
4207         if (!MSG_IS_UNREAD(msginfo->flags) &&  (newflags & MSG_UNREAD))
4208                 flags_unset |= IMAP_FLAG_SEEN;
4209         if ( MSG_IS_UNREAD(msginfo->flags) && !(newflags & MSG_UNREAD))
4210                 flags_set |= IMAP_FLAG_SEEN;
4211
4212         if (!MSG_IS_REPLIED(msginfo->flags) &&  (newflags & MSG_REPLIED))
4213                 flags_set |= IMAP_FLAG_ANSWERED;
4214         if ( MSG_IS_REPLIED(msginfo->flags) && !(newflags & MSG_REPLIED))
4215                 flags_unset |= IMAP_FLAG_ANSWERED;
4216
4217         if (!MSG_IS_FORWARDED(msginfo->flags) &&  (newflags & MSG_FORWARDED))
4218                 flags_set |= IMAP_FLAG_FORWARDED;
4219         if ( MSG_IS_FORWARDED(msginfo->flags) && !(newflags & MSG_FORWARDED))
4220                 flags_unset |= IMAP_FLAG_FORWARDED;
4221
4222         if (!MSG_IS_DELETED(msginfo->flags) &&  (newflags & MSG_DELETED))
4223                 flags_set |= IMAP_FLAG_DELETED;
4224         if ( MSG_IS_DELETED(msginfo->flags) && !(newflags & MSG_DELETED))
4225                 flags_unset |= IMAP_FLAG_DELETED;
4226
4227         if (!flags_set && !flags_unset) {
4228                 /* the changed flags were not translatable to IMAP-speak.
4229                  * like MSG_POSTFILTERED, so just apply. */
4230                 msginfo->flags.perm_flags = newflags;
4231                 return;
4232         }
4233
4234         debug_print("getting session...\n");
4235         session = imap_session_get(folder);
4236         if (!session) {
4237                 return;
4238         }
4239
4240         if ((ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
4241             NULL, NULL, NULL, NULL, NULL, FALSE)) != MAILIMAP_NO_ERROR) {
4242                 return;
4243         }
4244         numlist.next = NULL;
4245         numlist.data = GINT_TO_POINTER(msginfo->msgnum);
4246
4247         if (IMAP_FOLDER_ITEM(item)->batching) {
4248                 /* instead of performing an UID STORE command for each message change,
4249                  * as a lot of them can change "together", we just fill in hashtables
4250                  * and defer the treatment so that we're able to send only one
4251                  * command.
4252                  */
4253                 debug_print("IMAP batch mode on, deferring flags change\n");
4254                 if (flags_set) {
4255                         ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->flags_set_table,
4256                                 GINT_TO_POINTER(flags_set));
4257                         if (ht_data == NULL) {
4258                                 ht_data = g_new0(hashtable_data, 1);
4259                                 ht_data->item = IMAP_FOLDER_ITEM(item);
4260                                 g_hash_table_insert(IMAP_FOLDER_ITEM(item)->flags_set_table,
4261                                         GINT_TO_POINTER(flags_set), ht_data);
4262                         }
4263                         ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
4264                 }
4265                 if (flags_unset) {
4266                         ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->flags_unset_table,
4267                                 GINT_TO_POINTER(flags_unset));
4268                         if (ht_data == NULL) {
4269                                 ht_data = g_new0(hashtable_data, 1);
4270                                 ht_data->item = IMAP_FOLDER_ITEM(item);
4271                                 g_hash_table_insert(IMAP_FOLDER_ITEM(item)->flags_unset_table,
4272                                         GINT_TO_POINTER(flags_unset), ht_data);
4273                         }
4274                         ht_data->msglist = g_slist_prepend(ht_data->msglist,
4275                                         GINT_TO_POINTER(msginfo->msgnum));
4276                 }
4277         } else {
4278                 debug_print("IMAP changing flags\n");
4279                 if (flags_set) {
4280                         ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item), &numlist, flags_set, NULL, TRUE);
4281                         if (ok != MAILIMAP_NO_ERROR) {
4282                                 return;
4283                         }
4284                 }
4285
4286                 if (flags_unset) {
4287                         ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item), &numlist, flags_unset, NULL, FALSE);
4288                         if (ok != MAILIMAP_NO_ERROR) {
4289                                 return;
4290                         }
4291                 }
4292         }
4293         msginfo->flags.perm_flags = newflags;
4294         return;
4295 }
4296
4297 static gint imap_remove_msg(Folder *folder, FolderItem *item, gint uid)
4298 {
4299         gint ok;
4300         IMAPSession *session;
4301         gchar *dir;
4302         MsgNumberList numlist;
4303
4304         g_return_val_if_fail(folder != NULL, -1);
4305         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
4306         g_return_val_if_fail(item != NULL, -1);
4307
4308         debug_print("getting session...\n");
4309         session = imap_session_get(folder);
4310         if (!session) return -1;
4311
4312         ok = imap_select(session, IMAP_FOLDER(folder), item,
4313                          NULL, NULL, NULL, NULL, NULL, FALSE);
4314         if (ok != MAILIMAP_NO_ERROR) {
4315                 return ok;
4316         }
4317         numlist.next = NULL;
4318         numlist.data = GINT_TO_POINTER(uid);
4319
4320         ok = imap_set_message_flags
4321                 (session, IMAP_FOLDER_ITEM(item), &numlist, IMAP_FLAG_DELETED, NULL, TRUE);
4322         if (ok != MAILIMAP_NO_ERROR) {
4323                 log_warning(LOG_PROTOCOL, _("can't set deleted flags: %d\n"), uid);
4324                 return ok;
4325         }
4326
4327         if (!session->uidplus) {
4328                 ok = imap_cmd_expunge(session);
4329         } else {
4330                 gchar *uidstr;
4331
4332                 uidstr = g_strdup_printf("%u", uid);
4333                 ok = imap_cmd_expunge(session);
4334                 g_free(uidstr);
4335         }
4336         if (ok != MAILIMAP_NO_ERROR) {
4337                 log_warning(LOG_PROTOCOL, _("can't expunge\n"));
4338                 return ok;
4339         }
4340
4341         IMAP_FOLDER_ITEM(item)->uid_list = g_slist_remove(
4342             IMAP_FOLDER_ITEM(item)->uid_list, numlist.data);
4343         dir = folder_item_get_path(item);
4344         if (is_dir_exist(dir))
4345                 remove_numbered_files(dir, uid, uid);
4346         g_free(dir);
4347         return MAILIMAP_NO_ERROR;
4348 }
4349
4350 static gint compare_msginfo(gconstpointer a, gconstpointer b)
4351 {
4352         return ((MsgInfo *)a)->msgnum - ((MsgInfo *)b)->msgnum;
4353 }
4354
4355 static guint gslist_find_next_num(MsgNumberList **list, guint num)
4356 {
4357         GSList *elem;
4358
4359         g_return_val_if_fail(list != NULL, -1);
4360
4361         for (elem = *list; elem != NULL; elem = g_slist_next(elem))
4362                 if (GPOINTER_TO_INT(elem->data) >= num)
4363                         break;
4364         *list = elem;
4365         return elem != NULL ? GPOINTER_TO_INT(elem->data) : (gint)-1;
4366 }
4367
4368 static gboolean flag_ok(IMAPFolderItem *item, guint flag)
4369 {
4370         if (item->ok_flags && g_slist_find(item->ok_flags, GUINT_TO_POINTER(flag))) {
4371                 debug_print("flag %d is OK\n", flag);
4372                 return TRUE;
4373         }
4374         if (item->can_create_flags == ITEM_CAN_CREATE_FLAGS) {
4375                 debug_print("creating flags is OK\n");
4376                 return TRUE;
4377         }
4378         return FALSE;
4379 }
4380
4381 /*
4382  * NEW and DELETED flags are not syncronized
4383  * - The NEW/RECENT flags in IMAP folders can not really be directly
4384  *   modified by Sylpheed
4385  * - The DELETE/DELETED flag in IMAP and Sylpheed don't have the same
4386  *   meaning, in IMAP it always removes the messages from the FolderItem
4387  *   in Sylpheed it can mean to move the message to trash
4388  */
4389
4390 typedef struct _get_flags_data {
4391         Folder *folder;
4392         FolderItem *item;
4393         MsgInfoList *msginfo_list;
4394         GRelation *msgflags;
4395         gboolean full_search;
4396         gboolean done;
4397 } get_flags_data;
4398
4399 static /*gint*/ void *imap_get_flags_thread(void *data)
4400 {
4401         get_flags_data *stuff = (get_flags_data *)data;
4402         Folder *folder = stuff->folder;
4403         FolderItem *fitem = (FolderItem *) stuff->item;
4404         MsgInfoList *msginfo_list = stuff->msginfo_list;
4405         GRelation *msgflags = stuff->msgflags;
4406         GSList *elem;
4407         carray * lep_uidtab;
4408         IMAPSession *session;
4409         gint ok;
4410         int r = MAILIMAP_NO_ERROR;
4411         GHashTable *flags_hash = NULL;
4412         GHashTable *tags_hash = NULL;
4413         gboolean full_search = stuff->full_search;
4414         GSList *sorted_list = NULL;
4415         GSList *unseen = NULL, *answered = NULL, *flagged = NULL, *deleted = NULL, *forwarded = NULL;
4416         GSList *p_unseen, *p_answered, *p_flagged, *p_deleted, *p_forwarded;
4417         GSList *seq_list, *cur;
4418         gboolean reverse_seen = FALSE;
4419         gboolean selected_folder;
4420         gint exists_cnt, unseen_cnt;
4421         gboolean got_alien_tags = FALSE;
4422
4423         session = imap_session_get(folder);
4424
4425         if (session == NULL) {
4426                 stuff->done = TRUE;
4427                 return GINT_TO_POINTER(-1);
4428         }
4429         selected_folder = (session->mbox != NULL) &&
4430                           (!strcmp(session->mbox, fitem->path));
4431
4432         lock_session(session);
4433         if (!selected_folder) {
4434                 ok = imap_select(session, IMAP_FOLDER(folder), fitem,
4435                         &exists_cnt, NULL, &unseen_cnt, NULL, NULL, TRUE);
4436                 if (ok != MAILIMAP_NO_ERROR) {
4437                         stuff->done = TRUE;
4438                         return GINT_TO_POINTER(-1);
4439                 }
4440
4441                 if (unseen_cnt > exists_cnt / 2)
4442                         reverse_seen = TRUE;
4443         }
4444         else {
4445                 if (fitem->unread_msgs > fitem->total_msgs / 2)
4446                         reverse_seen = TRUE;
4447         }
4448
4449         sorted_list = g_slist_sort(g_slist_copy(msginfo_list), compare_msginfo);
4450         if (!full_search) {
4451                 seq_list = imap_get_lep_set_from_msglist(IMAP_FOLDER(folder), msginfo_list);
4452         } else {
4453                 struct mailimap_set * set;
4454                 set = mailimap_set_new_interval(1, 0);
4455                 seq_list = g_slist_append(NULL, set);
4456         }
4457
4458         if (folder->account && folder->account->low_bandwidth) {
4459                 for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
4460                         struct mailimap_set * imapset;
4461                         clist * lep_uidlist;
4462                         int r;
4463
4464                         imapset = cur->data;
4465                         if (reverse_seen) {
4466                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SEEN,
4467                                                          full_search ? NULL:imapset, &lep_uidlist);
4468                         }
4469                         else {
4470                                 r = imap_threaded_search(folder,
4471                                                          IMAP_SEARCH_TYPE_UNSEEN,
4472                                                          full_search ? NULL:imapset, &lep_uidlist);
4473                         }
4474                         if (r == MAILIMAP_NO_ERROR) {
4475                                 GSList * uidlist;
4476
4477                                 uidlist = imap_uid_list_from_lep(lep_uidlist);
4478                                 mailimap_search_result_free(lep_uidlist);
4479
4480                                 unseen = g_slist_concat(unseen, uidlist);
4481                         } else {
4482                                 imap_handle_error(SESSION(session), r);
4483                                 goto bail;
4484                         }
4485
4486                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_FLAGGED,
4487                                                  full_search ? NULL:imapset, &lep_uidlist);
4488                         if (r == MAILIMAP_NO_ERROR) {
4489                                 GSList * uidlist;
4490
4491                                 uidlist = imap_uid_list_from_lep(lep_uidlist);
4492                                 mailimap_search_result_free(lep_uidlist);
4493
4494                                 flagged = g_slist_concat(flagged, uidlist);
4495                         } else {
4496                                 imap_handle_error(SESSION(session), r);
4497                                 goto bail;
4498                         }
4499
4500                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
4501                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_ANSWERED,
4502                                                          full_search ? NULL:imapset, &lep_uidlist);
4503                                 if (r == MAILIMAP_NO_ERROR) {
4504                                         GSList * uidlist;
4505
4506                                         uidlist = imap_uid_list_from_lep(lep_uidlist);
4507                                         mailimap_search_result_free(lep_uidlist);
4508
4509                                         answered = g_slist_concat(answered, uidlist);
4510                                 } else {
4511                                         imap_handle_error(SESSION(session), r);
4512                                         goto bail;
4513                                 }
4514
4515                                 if (flag_ok(IMAP_FOLDER_ITEM(fitem), IMAP_FLAG_FORWARDED)) {
4516                                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_FORWARDED,
4517                                                                  full_search ? NULL:imapset, &lep_uidlist);
4518                                         if (r == MAILIMAP_NO_ERROR) {
4519                                                 GSList * uidlist;
4520
4521                                                 uidlist = imap_uid_list_from_lep(lep_uidlist);
4522                                                 mailimap_search_result_free(lep_uidlist);
4523
4524                                                 forwarded = g_slist_concat(forwarded, uidlist);
4525                                         } else {
4526                                                 imap_handle_error(SESSION(session), r);
4527                                                 goto bail;
4528                                         }
4529                                 }
4530
4531                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_DELETED,
4532                                                          full_search ? NULL:imapset, &lep_uidlist);
4533                                 if (r == MAILIMAP_NO_ERROR) {
4534                                         GSList * uidlist;
4535
4536                                         uidlist = imap_uid_list_from_lep(lep_uidlist);
4537                                         mailimap_search_result_free(lep_uidlist);
4538
4539                                         deleted = g_slist_concat(deleted, uidlist);
4540                                 } else {
4541                                         imap_handle_error(SESSION(session), r);
4542                                         goto bail;
4543                                 }
4544                         }
4545                 }
4546                 p_unseen = unseen;
4547                 p_answered = answered;
4548                 p_forwarded = forwarded;
4549                 p_flagged = flagged;
4550                 p_deleted = deleted;
4551
4552         } else {
4553                 r = imap_threaded_fetch_uid_flags(folder, 1, &lep_uidtab);
4554                 if (r == MAILIMAP_NO_ERROR) {
4555                         flags_hash = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, NULL);
4556                         tags_hash = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, NULL);
4557                         imap_flags_hash_from_lep_uid_flags_tab(lep_uidtab, flags_hash, tags_hash);
4558                         imap_fetch_uid_flags_list_free(lep_uidtab);
4559                 } else {
4560                         imap_handle_error(SESSION(session), r);
4561                         goto bail;
4562                 }
4563         }
4564
4565 bail:
4566         if (r == MAILIMAP_NO_ERROR)
4567                 unlock_session(session);
4568
4569         for (elem = sorted_list; elem != NULL; elem = g_slist_next(elem)) {
4570                 MsgInfo *msginfo;
4571                 MsgPermFlags flags, oldflags;
4572                 gboolean wasnew;
4573
4574                 msginfo = (MsgInfo *) elem->data;
4575                 flags = msginfo->flags.perm_flags;
4576                 wasnew = (flags & MSG_NEW);
4577                 oldflags = flags & ~(MSG_NEW|MSG_UNREAD|MSG_REPLIED|MSG_FORWARDED|MSG_MARKED|MSG_DELETED);
4578
4579                 if (folder->account && folder->account->low_bandwidth) {
4580                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
4581                                 flags &= ~((reverse_seen ? 0 : MSG_UNREAD | MSG_NEW) | MSG_REPLIED | MSG_FORWARDED | MSG_MARKED);
4582                         } else {
4583                                 flags &= ~((reverse_seen ? 0 : MSG_UNREAD | MSG_NEW | MSG_MARKED));
4584                         }
4585                         if (reverse_seen)
4586                                 flags |= MSG_UNREAD | (wasnew ? MSG_NEW : 0);
4587                         if (gslist_find_next_num(&p_unseen, msginfo->msgnum) == msginfo->msgnum) {
4588                                 if (!reverse_seen) {
4589                                         flags |= MSG_UNREAD | (wasnew ? MSG_NEW : 0);
4590                                 } else {
4591                                         flags &= ~(MSG_UNREAD | MSG_NEW);
4592                                 }
4593                         }
4594
4595                         if (gslist_find_next_num(&p_flagged, msginfo->msgnum) == msginfo->msgnum)
4596                                 flags |= MSG_MARKED;
4597                         else
4598                                 flags &= ~MSG_MARKED;
4599
4600                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
4601                                 if (gslist_find_next_num(&p_answered, msginfo->msgnum) == msginfo->msgnum)
4602                                         flags |= MSG_REPLIED;
4603                                 else
4604                                         flags &= ~MSG_REPLIED;
4605                                 if (gslist_find_next_num(&p_forwarded, msginfo->msgnum) == msginfo->msgnum)
4606                                         flags |= MSG_FORWARDED;
4607                                 else
4608                                         flags &= ~MSG_FORWARDED;
4609                                 if (gslist_find_next_num(&p_deleted, msginfo->msgnum) == msginfo->msgnum)
4610                                         flags |= MSG_DELETED;
4611                                 else
4612                                         flags &= ~MSG_DELETED;
4613                         }
4614                 } else {
4615                         if (flags_hash != NULL) {
4616
4617                                 flags = GPOINTER_TO_INT(g_hash_table_lookup(flags_hash,
4618                                                 GINT_TO_POINTER(msginfo->msgnum)));
4619                         }
4620
4621                         if ((flags & MSG_UNREAD) == 0)
4622                                 flags &= ~MSG_NEW;
4623                         else if (wasnew)
4624                                 flags |= MSG_NEW;
4625                         flags |= oldflags;
4626
4627                         if (tags_hash != NULL) {
4628                                 GSList *tags = g_hash_table_lookup(tags_hash, GINT_TO_POINTER(msginfo->msgnum));
4629                                 GSList *cur;
4630
4631                                 if (tags != NULL) {
4632                                         g_slist_free(msginfo->tags);
4633                                         msginfo->tags = NULL;
4634                                 }
4635                                 for (cur = tags; cur; cur = cur->next) {
4636                                         gchar *real_tag = imap_modified_utf7_to_utf8(cur->data, TRUE);
4637                                         gint id = 0;
4638                                         id = tags_get_id_for_str(real_tag);
4639                                         if (id == -1) {
4640                                                 id = tags_add_tag(real_tag);
4641                                                 got_alien_tags = TRUE;
4642                                         }
4643                                         if (!g_slist_find(msginfo->tags, GINT_TO_POINTER(id))) {
4644                                                 msginfo->tags = g_slist_append(
4645                                                                 msginfo->tags,
4646                                                                 GINT_TO_POINTER(id));
4647                                         }
4648                                         g_free(real_tag);
4649                                 }
4650                                 slist_free_strings(tags);
4651                                 g_slist_free(tags);
4652                         }
4653                 }
4654
4655                 g_relation_insert(msgflags, msginfo, GINT_TO_POINTER(flags));
4656         }
4657
4658         if (got_alien_tags) {
4659                 tags_write_tags();
4660                 main_window_reflect_tags_changes(mainwindow_get_mainwindow());
4661         }
4662
4663         if (flags_hash)
4664                 g_hash_table_destroy(flags_hash);
4665         if (tags_hash)
4666                 g_hash_table_destroy(tags_hash);
4667
4668         imap_lep_set_free(seq_list);
4669         g_slist_free(flagged);
4670         g_slist_free(deleted);
4671         g_slist_free(answered);
4672         g_slist_free(forwarded);
4673         g_slist_free(unseen);
4674         g_slist_free(sorted_list);
4675
4676         stuff->done = TRUE;
4677         return GINT_TO_POINTER(0);
4678 }
4679
4680 static gint imap_get_flags(Folder *folder, FolderItem *item,
4681                            MsgInfoList *msginfo_list, GRelation *msgflags)
4682 {
4683         gint result;
4684         get_flags_data *data = g_new0(get_flags_data, 1);
4685         data->done = FALSE;
4686         data->folder = folder;
4687         data->item = item;
4688         data->msginfo_list = msginfo_list;
4689         data->msgflags = msgflags;
4690         data->full_search = FALSE;
4691
4692         GSList *tmp = NULL, *cur;
4693
4694         if (prefs_common.work_offline &&
4695             !inc_offline_should_override(FALSE,
4696                 _("Claws Mail needs network access in order "
4697                   "to access the IMAP server."))) {
4698                 g_free(data);
4699                 return -1;
4700         }
4701
4702         tmp = folder_item_get_msg_list(item);
4703
4704         if (g_slist_length(tmp) <= g_slist_length(msginfo_list))
4705                 data->full_search = TRUE;
4706
4707         for (cur = tmp; cur; cur = cur->next)
4708                 procmsg_msginfo_free((MsgInfo *)cur->data);
4709
4710         g_slist_free(tmp);
4711
4712         result = GPOINTER_TO_INT(imap_get_flags_thread(data));
4713
4714         g_free(data);
4715         return result;
4716
4717 }
4718
4719 static gboolean process_flags(gpointer key, gpointer value, gpointer user_data)
4720 {
4721         gboolean flags_set = GPOINTER_TO_INT(user_data);
4722         gint flags_value = GPOINTER_TO_INT(key);
4723         hashtable_data *data = (hashtable_data *)value;
4724         IMAPFolderItem *_item = data->item;
4725         FolderItem *item = (FolderItem *)_item;
4726         gint ok = MAILIMAP_ERROR_BAD_STATE;
4727         IMAPSession *session = NULL;
4728
4729         debug_print("getting session...\n");
4730         session = imap_session_get(item->folder);
4731
4732         data->msglist = g_slist_reverse(data->msglist);
4733
4734         debug_print("IMAP %ssetting flags to %d for %d messages\n",
4735                 flags_set?"":"un",
4736                 flags_value,
4737                 g_slist_length(data->msglist));
4738
4739         lock_session(session);
4740         if (session) {
4741                 ok = imap_select(session, IMAP_FOLDER(item->folder), item,
4742                          NULL, NULL, NULL, NULL, NULL, FALSE);
4743         }
4744         if (ok == MAILIMAP_NO_ERROR) {
4745                 ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item),
4746                         data->msglist, flags_value, NULL, flags_set);
4747         } else {
4748                 g_warning("can't select mailbox %s\n", item->path);
4749         }
4750
4751         if (!is_fatal(ok))
4752                 unlock_session(session);
4753
4754         g_slist_free(data->msglist);
4755         g_free(data);
4756         return TRUE;
4757 }
4758
4759 static gboolean process_tags(gpointer key, gpointer value, gpointer user_data)
4760 {
4761         gboolean tags_set = GPOINTER_TO_INT(user_data);
4762         TagsData *data = (TagsData *)value;
4763         IMAPFolderItem *_item = data->item;
4764         FolderItem *item = (FolderItem *)_item;
4765         gchar *str = data->str;
4766         gint ok = MAILIMAP_ERROR_BAD_STATE;
4767         IMAPSession *session = NULL;
4768
4769         debug_print("getting session...\n");
4770         session = imap_session_get(item->folder);
4771
4772         data->msglist = g_slist_reverse(data->msglist);
4773
4774         debug_print("IMAP %ssetting tags %s for %d messages\n",
4775                 tags_set?"":"un",
4776                 str,
4777                 g_slist_length(data->msglist));
4778
4779         lock_session(session);
4780         if (session) {
4781                 ok = imap_select(session, IMAP_FOLDER(item->folder), item,
4782                          NULL, NULL, NULL, NULL, NULL, FALSE);
4783         }
4784         if (ok == MAILIMAP_NO_ERROR) {
4785                 GSList list;
4786                 list.data = str;
4787                 list.next = NULL;
4788                 ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item),
4789                         data->msglist, 0, &list, tags_set);
4790         } else {
4791                 g_warning("can't select mailbox %s\n", item->path);
4792         }
4793
4794         if (!is_fatal(ok))
4795                 unlock_session(session);
4796
4797         g_slist_free(data->msglist);
4798         g_free(data->str);
4799         g_free(data);
4800         return TRUE;
4801 }
4802
4803 static void process_hashtable(IMAPFolderItem *item)
4804 {
4805         if (item->flags_set_table) {
4806                 g_hash_table_foreach_remove(item->flags_set_table, process_flags, GINT_TO_POINTER(TRUE));
4807                 g_hash_table_destroy(item->flags_set_table);
4808                 item->flags_set_table = NULL;
4809         }
4810         if (item->flags_unset_table) {
4811                 g_hash_table_foreach_remove(item->flags_unset_table, process_flags, GINT_TO_POINTER(FALSE));
4812                 g_hash_table_destroy(item->flags_unset_table);
4813                 item->flags_unset_table = NULL;
4814         }
4815         if (item->tags_set_table) {
4816                 g_hash_table_foreach_remove(item->tags_set_table, process_tags, GINT_TO_POINTER(TRUE));
4817                 g_hash_table_destroy(item->tags_set_table);
4818                 item->tags_set_table = NULL;
4819         }
4820         if (item->tags_unset_table) {
4821                 g_hash_table_foreach_remove(item->tags_unset_table, process_tags, GINT_TO_POINTER(FALSE));
4822                 g_hash_table_destroy(item->tags_unset_table);
4823                 item->tags_unset_table = NULL;
4824         }
4825
4826 }
4827
4828 static void imap_set_batch (Folder *folder, FolderItem *_item, gboolean batch)
4829 {
4830         IMAPFolderItem *item = (IMAPFolderItem *)_item;
4831         IMAPSession *session;
4832
4833         g_return_if_fail(item != NULL);
4834
4835         if (item->batching == batch)
4836                 return;
4837
4838         if (batch) {
4839                 item->batching = TRUE;
4840                 debug_print("IMAP switching to batch mode\n");
4841                 if (!item->flags_set_table) {
4842                         item->flags_set_table = g_hash_table_new(NULL, g_direct_equal);
4843                 }
4844                 if (!item->flags_unset_table) {
4845                         item->flags_unset_table = g_hash_table_new(NULL, g_direct_equal);
4846                 }
4847                 if (!item->tags_set_table) {
4848                         item->tags_set_table = g_hash_table_new(NULL, g_direct_equal);
4849                 }
4850                 if (!item->tags_unset_table) {
4851                         item->tags_unset_table = g_hash_table_new(NULL, g_direct_equal);
4852                 }
4853                 session = imap_session_get(folder);
4854                 if (session) {
4855                         imap_refresh_sensitivity(session);
4856                         session->sens_update_block = TRUE;
4857                 }
4858         } else {
4859                 debug_print("IMAP switching away from batch mode\n");
4860                 /* process stuff */
4861                 process_hashtable(item);
4862                 item->batching = FALSE;
4863                 session = imap_session_get(folder);
4864                 if (session) {
4865                         session->sens_update_block = FALSE;
4866                         imap_refresh_sensitivity(session);
4867                 }
4868         }
4869 }
4870
4871
4872
4873 /* data types conversion libetpan <-> claws */
4874
4875
4876
4877 #define ETPAN_IMAP_MB_MARKED      1
4878 #define ETPAN_IMAP_MB_UNMARKED    2
4879 #define ETPAN_IMAP_MB_NOSELECT    4
4880 #define ETPAN_IMAP_MB_NOINFERIORS 8
4881
4882 static int imap_flags_to_flags(struct mailimap_mbx_list_flags * imap_flags)
4883 {
4884   int flags;
4885   clistiter * cur;
4886
4887   flags = 0;
4888   if (imap_flags->mbf_type == MAILIMAP_MBX_LIST_FLAGS_SFLAG) {
4889     switch (imap_flags->mbf_sflag) {
4890     case MAILIMAP_MBX_LIST_SFLAG_MARKED:
4891       flags |= ETPAN_IMAP_MB_MARKED;
4892       break;
4893     case MAILIMAP_MBX_LIST_SFLAG_NOSELECT:
4894       flags |= ETPAN_IMAP_MB_NOSELECT;
4895       break;
4896     case MAILIMAP_MBX_LIST_SFLAG_UNMARKED:
4897       flags |= ETPAN_IMAP_MB_UNMARKED;
4898       break;
4899     }
4900   }
4901
4902   for(cur = clist_begin(imap_flags->mbf_oflags) ; cur != NULL ;
4903       cur = clist_next(cur)) {
4904     struct mailimap_mbx_list_oflag * oflag;
4905
4906     oflag = clist_content(cur);
4907
4908     switch (oflag->of_type) {
4909     case MAILIMAP_MBX_LIST_OFLAG_NOINFERIORS:
4910       flags |= ETPAN_IMAP_MB_NOINFERIORS;
4911       break;
4912     }
4913   }
4914
4915   return flags;
4916 }
4917
4918 static GSList * imap_list_from_lep(IMAPFolder * folder,
4919                                    clist * list, const gchar * real_path, gboolean all)
4920 {
4921         clistiter * iter;
4922         GSList * item_list = NULL, *llast = NULL;
4923
4924         for(iter = clist_begin(list) ; iter != NULL ;
4925             iter = clist_next(iter)) {
4926                 struct mailimap_mailbox_list * mb;
4927                 int flags;
4928                 char delimiter;
4929                 char * name;
4930                 char * dup_name;
4931                 gchar * base;
4932                 gchar * loc_name;
4933                 gchar * loc_path;
4934                 FolderItem *new_item;
4935
4936                 mb = clist_content(iter);
4937
4938                 if (mb == NULL)
4939                         continue;
4940
4941                 flags = 0;
4942                 if (mb->mb_flag != NULL)
4943                         flags = imap_flags_to_flags(mb->mb_flag);
4944
4945                 delimiter = mb->mb_delimiter;
4946                 name = mb->mb_name;
4947
4948                 dup_name = strdup(name);
4949                 if (delimiter != '\0')
4950                         subst_char(dup_name, delimiter, '/');
4951
4952                 base = g_path_get_basename(dup_name);
4953                 if (base[0] == '.') {
4954                         g_free(base);
4955                         free(dup_name);
4956                         continue;
4957                 }
4958                 if (!all && path_cmp(name, real_path) == 0) {
4959                         g_free(base);
4960                         free(dup_name);
4961                         continue;
4962                 }
4963
4964                 if (!all && dup_name[strlen(dup_name)-1] == '/') {
4965                         dup_name[strlen(dup_name)-1] = '\0';
4966                 }
4967
4968                 loc_name = imap_modified_utf7_to_utf8(base, FALSE);
4969                 loc_path = imap_modified_utf7_to_utf8(dup_name, FALSE);
4970
4971                 new_item = folder_item_new(FOLDER(folder), loc_name, loc_path);
4972                 if ((flags & ETPAN_IMAP_MB_NOINFERIORS) != 0)
4973                         new_item->no_sub = TRUE;
4974                 if (strcmp(dup_name, "INBOX") != 0 &&
4975                     ((flags & ETPAN_IMAP_MB_NOSELECT) != 0))
4976                         new_item->no_select = TRUE;
4977
4978                 if (item_list == NULL)
4979                         llast = item_list = g_slist_append(item_list, new_item);
4980                 else {
4981                         llast = g_slist_append(llast, new_item);
4982                         llast = llast->next;
4983                 }
4984                 debug_print("folder '%s' found.\n", loc_path);
4985                 g_free(base);
4986                 g_free(loc_path);
4987                 g_free(loc_name);
4988
4989                 free(dup_name);
4990         }
4991
4992         return item_list;
4993 }
4994
4995 static GSList * imap_get_lep_set_from_numlist(IMAPFolder *folder, MsgNumberList *numlist)
4996 {
4997         GSList *sorted_list, *cur;
4998         guint first, last, next;
4999         GSList *ret_list = NULL, *llast = NULL;
5000         struct mailimap_set * current_set;
5001         unsigned int item_count;
5002
5003         if (numlist == NULL)
5004                 return NULL;
5005
5006         current_set = mailimap_set_new_empty();
5007
5008         sorted_list = g_slist_copy(numlist);
5009         sorted_list = g_slist_sort(sorted_list, g_int_compare);
5010
5011         first = GPOINTER_TO_INT(sorted_list->data);
5012
5013         item_count = 0;
5014         for (cur = sorted_list; cur != NULL; cur = g_slist_next(cur)) {
5015                 if (GPOINTER_TO_INT(cur->data) == 0)
5016                         continue;
5017
5018                 item_count ++;
5019
5020                 last = GPOINTER_TO_INT(cur->data);
5021                 if (cur->next)
5022                         next = GPOINTER_TO_INT(cur->next->data);
5023                 else
5024                         next = 0;
5025
5026                 if (last + 1 != next || next == 0 || item_count >= folder->max_set_size) {
5027
5028                         struct mailimap_set_item * item;
5029                         item = mailimap_set_item_new(first, last);
5030                         mailimap_set_add(current_set, item);
5031
5032                         first = next;
5033
5034                         if (item_count >= folder->max_set_size) {
5035                                 if (ret_list == NULL)
5036                                         llast = ret_list = g_slist_append(ret_list,
5037                                                           current_set);
5038                                 else {
5039                                         llast = g_slist_append(llast, current_set);
5040                                         llast = llast->next;
5041                                 }
5042
5043                                 current_set = mailimap_set_new_empty();
5044                                 item_count = 0;
5045                         }
5046                 }
5047         }
5048
5049         if (clist_count(current_set->set_list) > 0) {
5050                 ret_list = g_slist_append(ret_list,
5051                                           current_set);
5052         }
5053
5054         g_slist_free(sorted_list);
5055
5056         return ret_list;
5057 }
5058
5059 static GSList * imap_get_lep_set_from_msglist(IMAPFolder *folder, MsgInfoList *msglist)
5060 {
5061         MsgNumberList *numlist = NULL;
5062         MsgInfoList *cur;
5063         GSList *seq_list;
5064
5065         for (cur = msglist; cur != NULL; cur = g_slist_next(cur)) {
5066                 MsgInfo *msginfo = (MsgInfo *) cur->data;
5067
5068                 numlist = g_slist_prepend(numlist, GINT_TO_POINTER(msginfo->msgnum));
5069         }
5070         numlist = g_slist_reverse(numlist);
5071         seq_list = imap_get_lep_set_from_numlist(folder, numlist);
5072         g_slist_free(numlist);
5073
5074         return seq_list;
5075 }
5076
5077 static GSList * imap_uid_list_from_lep(clist * list)
5078 {
5079         clistiter * iter;
5080         GSList * result;
5081
5082         result = NULL;
5083
5084         for(iter = clist_begin(list) ; iter != NULL ;
5085             iter = clist_next(iter)) {
5086                 uint32_t * puid;
5087
5088                 puid = clist_content(iter);
5089                 result = g_slist_prepend(result, GINT_TO_POINTER(* puid));
5090         }
5091
5092         result = g_slist_reverse(result);
5093         return result;
5094 }
5095
5096 static GSList * imap_uid_list_from_lep_tab(carray * list)
5097 {
5098         unsigned int i;
5099         GSList * result;
5100
5101         result = NULL;
5102
5103         for(i = 0 ; i < carray_count(list) ; i ++) {
5104                 uint32_t * puid;
5105
5106                 puid = carray_get(list, i);
5107                 result = g_slist_prepend(result, GINT_TO_POINTER(* puid));
5108         }
5109         result = g_slist_reverse(result);
5110         return result;
5111 }
5112
5113 static void imap_flags_hash_from_lep_uid_flags_tab(carray * list,
5114                                                    GHashTable * hash,
5115                                                    GHashTable * tags_hash)
5116 {
5117         unsigned int i;
5118         GSList * result;
5119
5120         result = NULL;
5121
5122         for(i = 0 ; i < carray_count(list) ; i += 3) {
5123                 uint32_t * puid;
5124                 int * pflags;
5125                 GSList *tags;
5126
5127                 puid = carray_get(list, i);
5128                 pflags = carray_get(list, i + 1);
5129                 tags = carray_get(list, i + 2);
5130
5131                 g_hash_table_insert(hash, GINT_TO_POINTER(*puid), GINT_TO_POINTER(* pflags));
5132                 g_hash_table_insert(tags_hash, GINT_TO_POINTER(*puid), tags);
5133         }
5134 }
5135
5136 static MsgInfo *imap_envelope_from_lep(struct imap_fetch_env_info * info,
5137                                        FolderItem *item)
5138 {
5139         MsgInfo *msginfo = NULL;
5140         guint32 uid = 0;
5141         size_t size = 0;
5142         MsgFlags flags = {0, 0};
5143
5144         if (info->headers == NULL)
5145                 return NULL;
5146
5147         MSG_SET_TMP_FLAGS(flags, MSG_IMAP);
5148         if (folder_has_parent_of_type(item, F_QUEUE)) {
5149                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
5150         } else if (folder_has_parent_of_type(item, F_DRAFT)) {
5151                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
5152         }
5153         flags.perm_flags = info->flags;
5154
5155         uid = info->uid;
5156         size = info->size;
5157         msginfo = procheader_parse_str(info->headers, flags, FALSE, FALSE);
5158
5159         if (msginfo) {
5160                 msginfo->msgnum = uid;
5161                 msginfo->size = size;
5162         }
5163
5164         return msginfo;
5165 }
5166
5167 static void imap_lep_set_free(GSList *seq_list)
5168 {
5169         GSList * cur;
5170
5171         for(cur = seq_list ; cur != NULL ; cur = g_slist_next(cur)) {
5172                 struct mailimap_set * imapset;
5173
5174                 imapset = cur->data;
5175                 mailimap_set_free(imapset);
5176         }
5177         g_slist_free(seq_list);
5178 }
5179
5180 static struct mailimap_flag_list * imap_flag_to_lep(IMAPFolderItem *item, IMAPFlags flags, GSList *tags)
5181 {
5182         struct mailimap_flag_list * flag_list;
5183         GSList *cur = tags;
5184
5185         flag_list = mailimap_flag_list_new_empty();
5186
5187         if (IMAP_IS_SEEN(flags))
5188                 mailimap_flag_list_add(flag_list,
5189                                        mailimap_flag_new_seen());
5190         if (IMAP_IS_ANSWERED(flags))
5191                 mailimap_flag_list_add(flag_list,
5192                                        mailimap_flag_new_answered());
5193         if (IMAP_IS_FLAGGED(flags))
5194                 mailimap_flag_list_add(flag_list,
5195                                        mailimap_flag_new_flagged());
5196         if (IMAP_IS_DELETED(flags))
5197                 mailimap_flag_list_add(flag_list,
5198                                        mailimap_flag_new_deleted());
5199         if (IMAP_IS_DRAFT(flags))
5200                 mailimap_flag_list_add(flag_list,
5201                                        mailimap_flag_new_draft());
5202         if (IMAP_IS_FORWARDED(flags) && flag_ok(item, IMAP_FLAG_FORWARDED))
5203                 mailimap_flag_list_add(flag_list,
5204                                        mailimap_flag_new_flag_keyword(strdup("$Forwarded")));
5205
5206         for (; cur; cur = cur->next) {
5207                 gchar *enc_str =
5208                         imap_utf8_to_modified_utf7(cur->data, TRUE);
5209                 g_strstrip(enc_str);
5210
5211                 mailimap_flag_list_add(flag_list,
5212                         mailimap_flag_new_flag_keyword(enc_str));
5213         }
5214
5215         return flag_list;
5216 }
5217
5218 guint imap_folder_get_refcnt(Folder *folder)
5219 {
5220         return ((IMAPFolder *)folder)->refcnt;
5221 }
5222
5223 void imap_folder_ref(Folder *folder)
5224 {
5225         ((IMAPFolder *)folder)->refcnt++;
5226 }
5227
5228 void imap_disconnect_all(void)
5229 {
5230         GList *list;
5231         gboolean short_timeout;
5232 #ifdef HAVE_NETWORKMANAGER_SUPPORT
5233         GError *error;
5234 #endif
5235
5236 #ifdef HAVE_NETWORKMANAGER_SUPPORT
5237         error = NULL;
5238         short_timeout = !networkmanager_is_online(&error);
5239         if(error) {
5240                 short_timeout = TRUE;
5241                 g_error_free(error);
5242         }
5243 #else
5244         short_timeout = TRUE;
5245 #endif
5246
5247         if(short_timeout)
5248                 imap_main_set_timeout(1);
5249
5250         for (list = account_get_list(); list != NULL; list = list->next) {
5251                 PrefsAccount *account = list->data;
5252                 if (account->protocol == A_IMAP4) {
5253                         RemoteFolder *folder = (RemoteFolder *)account->folder;
5254                         if (folder && folder->session) {
5255                                 IMAPSession *session = (IMAPSession *)folder->session;
5256                                 imap_threaded_disconnect(FOLDER(folder));
5257                                 SESSION(session)->state = SESSION_DISCONNECTED;
5258                                 session_destroy(SESSION(session));
5259                                 folder->session = NULL;
5260                         }
5261                 }
5262         }
5263
5264         if(short_timeout)
5265                 imap_main_set_timeout(prefs_common.io_timeout_secs);
5266 }
5267
5268 void imap_folder_unref(Folder *folder)
5269 {
5270         if (((IMAPFolder *)folder)->refcnt > 0)
5271                 ((IMAPFolder *)folder)->refcnt--;
5272 }
5273
5274 void imap_cancel_all(void)
5275 {
5276         GList *folderlist;
5277         GList *cur;
5278
5279         folderlist = folder_get_list();
5280         for (cur = folderlist; cur != NULL; cur = g_list_next(cur)) {
5281                 Folder *folder = (Folder *) cur->data;
5282
5283                 if (folder->klass == &imap_class) {
5284                         if (imap_is_busy(folder)) {
5285                                 IMAPSession *imap_session;
5286                                 RemoteFolder *rfolder;
5287
5288                                 g_printerr("cancelled\n");
5289                                 imap_threaded_cancel(folder);
5290                                 rfolder = (RemoteFolder *) folder;
5291                                 imap_session = (IMAPSession *) rfolder->session;
5292                                 if (imap_session)
5293                                         imap_session->cancelled = 1;
5294                         }
5295                 }
5296         }
5297 }
5298
5299 gboolean imap_cancel_all_enabled(void)
5300 {
5301         GList *folderlist;
5302         GList *cur;
5303
5304         folderlist = folder_get_list();
5305         for (cur = folderlist; cur != NULL; cur = g_list_next(cur)) {
5306                 Folder *folder = (Folder *) cur->data;
5307
5308                 if (folder->klass == &imap_class) {
5309                         if (imap_is_busy(folder)) {
5310                                 return TRUE;
5311                         }
5312                 }
5313         }
5314
5315         return FALSE;
5316 }
5317
5318 static gboolean imap_is_busy(Folder *folder)
5319 {
5320         IMAPSession *imap_session;
5321         RemoteFolder *rfolder;
5322
5323         rfolder = (RemoteFolder *) folder;
5324         imap_session = (IMAPSession *) rfolder->session;
5325         if (imap_session == NULL)
5326                 return FALSE;
5327
5328         return imap_session->busy;
5329 }
5330
5331 #else /* HAVE_LIBETPAN */
5332
5333 static FolderClass imap_class;
5334
5335 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item);
5336 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag);
5337
5338 static Folder   *imap_folder_new        (const gchar    *name,
5339                                          const gchar    *path)
5340 {
5341         static gboolean missing_imap_warning = TRUE;
5342         if (missing_imap_warning) {
5343                 missing_imap_warning = FALSE;
5344                 alertpanel_error(
5345                         _("You have one or more IMAP accounts "
5346                           "defined. However this version of "
5347                           "Claws Mail has been built without "
5348                           "IMAP support; your IMAP account(s) are "
5349                           "disabled.\n\n"
5350                           "You probably need to "
5351                           "install libetpan and recompile "
5352                           "Claws Mail."));
5353         }
5354         return NULL;
5355 }
5356 static gint     imap_create_tree        (Folder         *folder)
5357 {
5358         return -1;
5359 }
5360 static FolderItem *imap_create_folder   (Folder         *folder,
5361                                          FolderItem     *parent,
5362                                          const gchar    *name)
5363 {
5364         return NULL;
5365 }
5366 static gint     imap_rename_folder      (Folder         *folder,
5367                                          FolderItem     *item,
5368                                          const gchar    *name)
5369 {
5370         return -1;
5371 }
5372
5373 gchar imap_get_path_separator_for_item(FolderItem *item)
5374 {
5375         return '/';
5376 }
5377
5378 FolderClass *imap_get_class(void)
5379 {
5380         if (imap_class.idstr == NULL) {
5381                 imap_class.type = F_IMAP;
5382                 imap_class.idstr = "imap";
5383                 imap_class.uistr = "IMAP4";
5384
5385                 imap_class.new_folder = imap_folder_new;
5386                 imap_class.create_tree = imap_create_tree;
5387                 imap_class.create_folder = imap_create_folder;
5388                 imap_class.rename_folder = imap_rename_folder;
5389
5390                 imap_class.set_xml = folder_set_xml;
5391                 imap_class.get_xml = folder_get_xml;
5392                 imap_class.item_set_xml = imap_item_set_xml;
5393                 imap_class.item_get_xml = imap_item_get_xml;
5394                 /* nothing implemented */
5395         }
5396
5397         return &imap_class;
5398 }
5399
5400 void imap_disconnect_all(void)
5401 {
5402 }
5403
5404 gint imap_subscribe(Folder *folder, FolderItem *item, gchar *rpath, gboolean sub)
5405 {
5406         return -1;
5407 }
5408
5409 GList * imap_scan_subtree(Folder *folder, FolderItem *item, gboolean unsubs_only, gboolean recursive)
5410 {
5411         return NULL;
5412 }
5413
5414 void imap_cache_msg(FolderItem *item, gint msgnum)
5415 {
5416 }
5417
5418 void imap_cancel_all(void)
5419 {
5420 }
5421
5422 gboolean imap_cancel_all_enabled(void)
5423 {
5424         return FALSE;
5425 }
5426
5427 #endif
5428
5429 #ifdef HAVE_LIBETPAN
5430 static void imap_synchronise(FolderItem *item, gint days)
5431 {
5432         if (IMAP_FOLDER_ITEM(item)->last_sync == IMAP_FOLDER_ITEM(item)->last_change) {
5433                 debug_print("%s already synced\n", item->path?item->path:item->name);
5434                 return;
5435         }
5436         debug_print("syncing %s\n", item->path?item->path:item->name);
5437         imap_gtk_synchronise(item, days);
5438         IMAP_FOLDER_ITEM(item)->last_sync = IMAP_FOLDER_ITEM(item)->last_change;
5439 }
5440 #endif
5441
5442 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag)
5443 {
5444 #ifdef HAVE_LIBETPAN
5445         GList *cur;
5446 #endif
5447         folder_item_set_xml(folder, item, tag);
5448
5449 #ifdef HAVE_LIBETPAN
5450         for (cur = tag->attr; cur != NULL; cur = g_list_next(cur)) {
5451                 XMLAttr *attr = (XMLAttr *) cur->data;
5452
5453                 if (!attr || !attr->name || !attr->value) continue;
5454                 if (!strcmp(attr->name, "uidnext"))
5455                         IMAP_FOLDER_ITEM(item)->uid_next = atoi(attr->value);
5456                 if (!strcmp(attr->name, "last_sync"))
5457                         IMAP_FOLDER_ITEM(item)->last_sync = atoi(attr->value);
5458                 if (!strcmp(attr->name, "last_change"))
5459                         IMAP_FOLDER_ITEM(item)->last_change = atoi(attr->value);
5460         }
5461         if (IMAP_FOLDER_ITEM(item)->last_change == 0)
5462                 IMAP_FOLDER_ITEM(item)->last_change = time(NULL);
5463 #endif
5464 }
5465
5466 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item)
5467 {
5468         XMLTag *tag;
5469
5470         tag = folder_item_get_xml(folder, item);
5471
5472 #ifdef HAVE_LIBETPAN
5473         xml_tag_add_attr(tag, xml_attr_new_int("uidnext",
5474                         IMAP_FOLDER_ITEM(item)->uid_next));
5475         xml_tag_add_attr(tag, xml_attr_new_int("last_sync",
5476                         IMAP_FOLDER_ITEM(item)->last_sync));
5477         xml_tag_add_attr(tag, xml_attr_new_int("last_change",
5478                         IMAP_FOLDER_ITEM(item)->last_change));
5479
5480 #endif
5481         return tag;
5482 }
5483
5484 /* ===================================================================
5485  * UTF-7 conversion routines as in RFC 2192
5486  * ===================================================================
5487  * These two functions from:
5488  * libimap library.
5489  * Copyright (C) 2003-2004 Pawel Salek. */
5490
5491 /* UTF7 modified base64 alphabet */
5492 static char base64chars[] =
5493   "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+,";
5494 #define UNDEFINED 64
5495
5496 /* UTF16 definitions */
5497 #define UTF16MASK       0x03FFUL
5498 #define UTF16SHIFT      10
5499 #define UTF16BASE       0x10000UL
5500 #define UTF16HIGHSTART  0xD800UL
5501 #define UTF16HIGHEND    0xDBFFUL
5502 #define UTF16LOSTART    0xDC00UL
5503 #define UTF16LOEND      0xDFFFUL
5504
5505
5506 /* Convert an IMAP mailbox to a UTF-8 string.
5507  *  dst needs to have roughly 4 times the storage space of src
5508  *    Hex encoding can triple the size of the input
5509  *    UTF-7 can be slightly denser than UTF-8
5510  *     (worst case: 8 octets UTF-7 becomes 9 octets UTF-8)
5511  */
5512 char* imap_modified_utf7_to_utf8(const char *mbox, gboolean change_spaces)
5513 {
5514   unsigned c, i, bitcount;
5515   unsigned long ucs4, utf16, bitbuf;
5516   unsigned char base64[256];
5517   const char *src;
5518   char *dst, *res  = malloc(2*strlen(mbox)+1);
5519
5520   bitbuf = 0;
5521   dst = res;
5522   src = mbox;
5523   if(!dst) return NULL;
5524   /* initialize modified base64 decoding table */
5525   memset(base64, UNDEFINED, sizeof (base64));
5526   for (i = 0; i < sizeof (base64chars); ++i) {
5527     base64[(unsigned)base64chars[i]] = i;
5528   }
5529
5530   /* loop until end of string */
5531   while (*src != '\0') {
5532     c = *src++;
5533     /* deal with literal characters and &- */
5534     if (c != '&' || *src == '-') {
5535       /* encode literally */
5536       if (change_spaces && c == '_')
5537         *dst++ = ' ';
5538       else
5539         *dst++ = c;
5540       /* skip over the '-' if this is an &- sequence */
5541       if (c == '&') ++src;
5542     } else {
5543       /* convert modified UTF-7 -> UTF-16 -> UCS-4 -> UTF-8 -> HEX */
5544       bitbuf = 0;
5545       bitcount = 0;
5546       ucs4 = 0;
5547       while ((c = base64[(unsigned char) *src]) != UNDEFINED) {
5548         ++src;
5549         bitbuf = (bitbuf << 6) | c;
5550         bitcount += 6;
5551         /* enough bits for a UTF-16 character? */
5552         if (bitcount >= 16) {
5553           bitcount -= 16;
5554           utf16 = (bitcount ? bitbuf >> bitcount
5555                    : bitbuf) & 0xffff;
5556           /* convert UTF16 to UCS4 */
5557           if
5558             (utf16 >= UTF16HIGHSTART && utf16 <= UTF16HIGHEND) {
5559             ucs4 = (utf16 - UTF16HIGHSTART) << UTF16SHIFT;
5560             continue;
5561           } else if
5562             (utf16 >= UTF16LOSTART && utf16 <= UTF16LOEND) {
5563             ucs4 += utf16 - UTF16LOSTART + UTF16BASE;
5564           } else {
5565             ucs4 = utf16;
5566           }
5567
5568           /* convert UTF-16 range of UCS4 to UTF-8 */
5569           if (ucs4 <= 0x7fUL) {
5570             dst[0] = ucs4;
5571             dst += 1;
5572           } else if (ucs4 <= 0x7ffUL) {
5573             dst[0] = 0xc0 | (ucs4 >> 6);
5574             dst[1] = 0x80 | (ucs4 & 0x3f);
5575             dst += 2;
5576           } else if (ucs4 <= 0xffffUL) {
5577             dst[0] = 0xe0 | (ucs4 >> 12);
5578             dst[1] = 0x80 | ((ucs4 >> 6) & 0x3f);
5579             dst[2] = 0x80 | (ucs4 & 0x3f);
5580             dst += 3;
5581           } else {
5582             dst[0] = 0xf0 | (ucs4 >> 18);
5583             dst[1] = 0x80 | ((ucs4 >> 12) & 0x3f);
5584             dst[2] = 0x80 | ((ucs4 >> 6) & 0x3f);
5585             dst[3] = 0x80 | (ucs4 & 0x3f);
5586             dst += 4;
5587           }
5588         }
5589       }
5590       /* skip over trailing '-' in modified UTF-7 encoding */
5591       if (*src == '-') ++src;
5592     }
5593   }
5594   /* terminate destination string */
5595   *dst = '\0';
5596   return res;
5597 }
5598
5599 /* Convert hex coded UTF-8 string to modified UTF-7 IMAP mailbox
5600  *  dst should be about twice the length of src to deal with non-hex
5601  *  coded URLs
5602  */
5603 char* imap_utf8_to_modified_utf7(const char *src, gboolean change_spaces)
5604 {
5605   unsigned int utf8pos, utf8total, c, utf7mode, bitstogo, utf16flag;
5606   unsigned long ucs4 = 0, bitbuf = 0;
5607
5608   /* initialize hex lookup table */
5609   char *dst, *res = malloc(2*strlen(src)+1);
5610   dst = res;
5611   if(!dst) return NULL;
5612
5613   utf7mode = 0;
5614   utf8total = 0;
5615   bitstogo = 0;
5616   utf8pos = 0;
5617   while ((c = (unsigned char)*src) != '\0') {
5618     ++src;
5619     /* normal character? */
5620     if (c >= ' ' && c <= '~' && (c != '_' || !change_spaces)) {
5621       /* switch out of UTF-7 mode */
5622       if (utf7mode) {
5623         if (bitstogo) {
5624           *dst++ = base64chars[(bitbuf << (6 - bitstogo)) & 0x3F];
5625         }
5626         *dst++ = '-';
5627         utf7mode = 0;
5628         utf8pos  = 0;
5629         bitstogo = 0;
5630         utf8total= 0;
5631       }
5632       if (change_spaces && c == ' ')
5633         *dst++ = '_';
5634       else
5635         *dst++ = c;
5636       /* encode '&' as '&-' */
5637       if (c == '&') {
5638         *dst++ = '-';
5639       }
5640       continue;
5641     }
5642     /* switch to UTF-7 mode */
5643     if (!utf7mode) {
5644       *dst++ = '&';
5645       utf7mode = 1;
5646     }
5647     /* Encode US-ASCII characters as themselves */
5648     if (c < 0x80) {
5649       ucs4 = c;
5650       utf8total = 1;
5651     } else if (utf8total) {
5652       /* save UTF8 bits into UCS4 */
5653       ucs4 = (ucs4 << 6) | (c & 0x3FUL);
5654       if (++utf8pos < utf8total) {
5655         continue;
5656       }
5657     } else {
5658       utf8pos = 1;
5659       if (c < 0xE0) {
5660         utf8total = 2;
5661         ucs4 = c & 0x1F;
5662       } else if (c < 0xF0) {
5663         utf8total = 3;
5664         ucs4 = c & 0x0F;
5665       } else {
5666         /* NOTE: can't convert UTF8 sequences longer than 4 */
5667         utf8total = 4;
5668         ucs4 = c & 0x03;
5669       }
5670       continue;
5671     }
5672     /* loop to split ucs4 into two utf16 chars if necessary */
5673     utf8total = 0;
5674     do {
5675       if (ucs4 >= UTF16BASE) {
5676         ucs4 -= UTF16BASE;
5677         bitbuf = (bitbuf << 16) | ((ucs4 >> UTF16SHIFT)
5678                                    + UTF16HIGHSTART);
5679         ucs4 = (ucs4 & UTF16MASK) + UTF16LOSTART;
5680         utf16flag = 1;
5681       } else {
5682         bitbuf = (bitbuf << 16) | ucs4;
5683         utf16flag = 0;
5684       }
5685       bitstogo += 16;
5686       /* spew out base64 */
5687       while (bitstogo >= 6) {
5688         bitstogo -= 6;
5689         *dst++ = base64chars[(bitstogo ? (bitbuf >> bitstogo)
5690                               : bitbuf)
5691                              & 0x3F];
5692       }
5693     } while (utf16flag);
5694   }
5695   /* if in UTF-7 mode, finish in ASCII */
5696   if (utf7mode) {
5697     if (bitstogo) {
5698       *dst++ = base64chars[(bitbuf << (6 - bitstogo)) & 0x3F];
5699     }
5700     *dst++ = '-';
5701   }
5702   /* tie off string */
5703   *dst = '\0';
5704   return res;
5705 }