src/imap.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2012 Hiroyuki Yamamoto and the Claws Mail team
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #  include "config.h"
  22 #include "claws-features.h"
  23 #endif
  24
  25 #include "defs.h"
  26
  27 #include <glib.h>
  28 #include <glib/gi18n.h>
  29 #include <stdio.h>
  30 #include <string.h>
  31 #include "imap.h"
  32 #include "imap_gtk.h"
  33 #include "inc.h"
  34 #include "xml.h"
  35 #include "alertpanel.h"
  36
  37 #ifdef HAVE_LIBETPAN
  38
  39 #include <stdlib.h>
  40 #include <dirent.h>
  41 #include <unistd.h>
  42 #include <ctype.h>
  43 #include <time.h>
  44 #include <errno.h>
  45 #if HAVE_ICONV
  46 #  include <iconv.h>
  47 #endif
  48
  49 #ifdef USE_GNUTLS
  50 #  include "ssl.h"
  51 #endif
  52
  53 #include "folder.h"
  54 #include "session.h"
  55 #include "procmsg.h"
  56 #include "socket.h"
  57 #include "recv.h"
  58 #include "procheader.h"
  59 #include "prefs_account.h"
  60 #include "codeconv.h"
  61 #include "md5.h"
  62 #include "base64.h"
  63 #include "utils.h"
  64 #include "prefs_common.h"
  65 #include "inputdialog.h"
  66 #include "log.h"
  67 #include "remotefolder.h"
  68 #include "claws.h"
  69 #include "statusbar.h"
  70 #include "msgcache.h"
  71 #include "imap-thread.h"
  72 #include "account.h"
  73 #include "tags.h"
  74 #include "main.h"
  75
  76 typedef struct _IMAPFolder      IMAPFolder;
  77 typedef struct _IMAPSession     IMAPSession;
  78 typedef struct _IMAPNameSpace   IMAPNameSpace;
  79 typedef struct _IMAPFolderItem  IMAPFolderItem;
  80
  81 #include "prefs_account.h"
  82
  83 #define IMAP_FOLDER(obj)        ((IMAPFolder *)obj)
  84 #define IMAP_FOLDER_ITEM(obj)   ((IMAPFolderItem *)obj)
  85 #define IMAP_SESSION(obj)       ((IMAPSession *)obj)
  86
  87 struct _IMAPFolder
  88 {
  89         RemoteFolder rfolder;
  90
  91         /* list of IMAPNameSpace */
  92         GList *ns_personal;
  93         GList *ns_others;
  94         GList *ns_shared;
  95         gchar last_seen_separator;
  96         guint refcnt;
  97         guint max_set_size;
  98         gchar *search_charset;
  99         gboolean search_charset_supported;
 100 };
 101
 102 struct _IMAPSession
 103 {
 104         Session session;
 105
 106         gboolean authenticated;
 107
 108         GSList *capability;
 109         gboolean uidplus;
 110
 111         gchar *mbox;
 112         guint cmd_count;
 113
 114         /* CLAWS */
 115         gboolean folder_content_changed;
 116         guint exists;
 117         guint recent;
 118         guint expunge;
 119         guint unseen;
 120         guint uid_validity;
 121         guint uid_next;
 122
 123         Folder * folder;
 124         gboolean busy;
 125         gboolean cancelled;
 126         gboolean sens_update_block;
 127         gboolean do_destroy;
 128 };
 129
 130 struct _IMAPNameSpace
 131 {
 132         gchar *name;
 133         gchar separator;
 134 };
 135
 136 #define IMAPBUFSIZE     8192
 137
 138 #define IMAP_IS_SEEN(flags)     ((flags & IMAP_FLAG_SEEN) != 0)
 139 #define IMAP_IS_ANSWERED(flags) ((flags & IMAP_FLAG_ANSWERED) != 0)
 140 #define IMAP_IS_FLAGGED(flags)  ((flags & IMAP_FLAG_FLAGGED) != 0)
 141 #define IMAP_IS_DELETED(flags)  ((flags & IMAP_FLAG_DELETED) != 0)
 142 #define IMAP_IS_DRAFT(flags)    ((flags & IMAP_FLAG_DRAFT) != 0)
 143 #define IMAP_IS_FORWARDED(flags)        ((flags & IMAP_FLAG_FORWARDED) != 0)
 144 #define IMAP_IS_SPAM(flags)     ((flags & IMAP_FLAG_SPAM) != 0)
 145 #define IMAP_IS_HAM(flags)      ((flags & IMAP_FLAG_HAM) != 0)
 146
 147
 148 #define IMAP4_PORT      143
 149 #ifdef USE_GNUTLS
 150 #define IMAPS_PORT      993
 151 #endif
 152
 153 #define IMAP_CMD_LIMIT  1000
 154
 155 enum {
 156         ITEM_CAN_CREATE_FLAGS_UNKNOWN = 0,
 157         ITEM_CAN_CREATE_FLAGS,
 158         ITEM_CANNOT_CREATE_FLAGS
 159 };
 160
 161 struct _IMAPFolderItem
 162 {
 163         FolderItem item;
 164
 165         guint lastuid;
 166         guint uid_next;
 167         GSList *uid_list;
 168         gboolean batching;
 169
 170         GHashTable *flags_set_table;
 171         GHashTable *flags_unset_table;
 172         guint32 last_change;
 173         guint32 last_sync;
 174         gboolean should_update;
 175         gboolean should_trash_cache;
 176         gint can_create_flags;
 177
 178         GHashTable *tags_set_table;
 179         GHashTable *tags_unset_table;
 180         GSList *ok_flags;
 181
 182 };
 183
 184 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item);
 185 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag);
 186
 187 static void imap_folder_init            (Folder         *folder,
 188                                          const gchar    *name,
 189                                          const gchar    *path);
 190
 191 static Folder   *imap_folder_new        (const gchar    *name,
 192                                          const gchar    *path);
 193 static void      imap_folder_destroy    (Folder         *folder);
 194
 195 static IMAPSession *imap_session_new    (Folder         *folder,
 196                                          const PrefsAccount     *account);
 197 static gint     imap_session_authenticate(IMAPSession   *session,
 198                                           PrefsAccount  *account);
 199 static void     imap_session_destroy    (Session        *session);
 200
 201 static gchar   *imap_fetch_msg          (Folder         *folder,
 202                                          FolderItem     *item,
 203                                          gint            uid);
 204 static gchar   *imap_fetch_msg_full     (Folder         *folder,
 205                                          FolderItem     *item,
 206                                          gint            uid,
 207                                          gboolean        headers,
 208                                          gboolean        body);
 209 static void     imap_remove_cached_msg  (Folder         *folder,
 210                                          FolderItem     *item,
 211                                          MsgInfo        *msginfo);
 212 static gint     imap_add_msg            (Folder         *folder,
 213                                          FolderItem     *dest,
 214                                          const gchar    *file,
 215                                          MsgFlags       *flags);
 216 static gint     imap_add_msgs           (Folder         *folder,
 217                                          FolderItem     *dest,
 218                                          GSList         *file_list,
 219                                          GHashTable     *relation);
 220
 221 static gint     imap_copy_msg           (Folder         *folder,
 222                                          FolderItem     *dest,
 223                                          MsgInfo        *msginfo);
 224 static gint     imap_copy_msgs          (Folder         *folder,
 225                                          FolderItem     *dest,
 226                                          MsgInfoList    *msglist,
 227                                          GHashTable     *relation);
 228
 229 static gint     search_msgs             (Folder                 *folder,
 230                                          FolderItem             *container,
 231                                          MsgNumberList          **msgs,
 232                                          gboolean               *on_server,
 233                                          MatcherList            *predicate,
 234                                          SearchProgressNotify   progress_cb,
 235                                          gpointer               progress_data);
 236
 237 static gint     imap_remove_msg         (Folder         *folder,
 238                                          FolderItem     *item,
 239                                          gint            uid);
 240 static gint     imap_remove_msgs        (Folder         *folder,
 241                                          FolderItem     *dest,
 242                                          MsgInfoList    *msglist,
 243                                          GHashTable     *relation);
 244 static gint     imap_expunge            (Folder         *folder,
 245                                          FolderItem     *dest);
 246 static gint     imap_remove_all_msg     (Folder         *folder,
 247                                          FolderItem     *item);
 248
 249 static gboolean imap_is_msg_changed     (Folder         *folder,
 250                                          FolderItem     *item,
 251                                          MsgInfo        *msginfo);
 252
 253 static gint     imap_close              (Folder         *folder,
 254                                          FolderItem     *item);
 255
 256 static gint     imap_scan_tree          (Folder         *folder);
 257
 258 static gint     imap_create_tree        (Folder         *folder);
 259
 260 static FolderItem *imap_create_folder   (Folder         *folder,
 261                                          FolderItem     *parent,
 262                                          const gchar    *name);
 263 static gint     imap_rename_folder      (Folder         *folder,
 264                                          FolderItem     *item,
 265                                          const gchar    *name);
 266 static gint     imap_remove_folder      (Folder         *folder,
 267                                          FolderItem     *item);
 268
 269 static FolderItem *imap_folder_item_new (Folder         *folder);
 270 static void imap_folder_item_destroy    (Folder         *folder,
 271                                          FolderItem     *item);
 272
 273 static IMAPSession *imap_session_get    (Folder         *folder);
 274
 275 static gint imap_auth                   (IMAPSession    *session,
 276                                          const gchar    *user,
 277                                          const gchar    *pass,
 278                                          IMAPAuthType    type);
 279
 280 static gint imap_scan_tree_recursive    (IMAPSession    *session,
 281                                          FolderItem     *item,
 282                                          gboolean        subs_only);
 283
 284 static void imap_create_missing_folders (Folder         *folder);
 285 static FolderItem *imap_create_special_folder
 286                                         (Folder                 *folder,
 287                                          SpecialFolderItemType   stype,
 288                                          const gchar            *name);
 289
 290 static gint imap_do_copy_msgs           (Folder         *folder,
 291                                          FolderItem     *dest,
 292                                          MsgInfoList    *msglist,
 293                                          GHashTable     *relation);
 294
 295 static void imap_delete_all_cached_messages     (FolderItem     *item);
 296 static void imap_set_batch              (Folder         *folder,
 297                                          FolderItem     *item,
 298                                          gboolean        batch);
 299 static gint imap_set_message_flags      (IMAPSession    *session,
 300                                          IMAPFolderItem *item,
 301                                          MsgNumberList  *numlist,
 302                                          IMAPFlags       flags,
 303                                          GSList         *tags,
 304                                          gboolean        is_set);
 305 static gint imap_select                 (IMAPSession    *session,
 306                                          IMAPFolder     *folder,
 307                                          FolderItem     *item,
 308                                          gint           *exists,
 309                                          gint           *recent,
 310                                          gint           *unseen,
 311                                          guint32        *uid_validity,
 312                                          gint           *can_create_flags,
 313                                          gboolean        block);
 314 static gint imap_status                 (IMAPSession    *session,
 315                                          IMAPFolder     *folder,
 316                                          const gchar    *path,
 317                                          IMAPFolderItem *item,
 318                                          gint           *messages,
 319                                          guint32        *uid_next,
 320                                          guint32        *uid_validity,
 321                                          gint           *unseen,
 322                                          gboolean        block);
 323 static void     imap_commit_tags        (FolderItem     *item,
 324                                          MsgInfo        *msginfo,
 325                                          GSList         *set_tags,
 326                                          GSList         *unset_tags);
 327
 328 static gchar imap_get_path_separator            (IMAPSession    *session,
 329                                                  IMAPFolder     *folder,
 330                                                  const gchar    *path,
 331                                                  gint           *ok);
 332 static gchar *imap_get_real_path                (IMAPSession    *session,
 333                                                  IMAPFolder     *folder,
 334                                                  const gchar    *path,
 335                                                  gint           *ok);
 336 #ifdef HAVE_LIBETPAN
 337 static void imap_synchronise            (FolderItem     *item, gint days);
 338 #endif
 339 static gboolean imap_is_busy            (Folder *folder);
 340
 341 static void imap_free_capabilities      (IMAPSession    *session);
 342
 343 /* low-level IMAP4rev1 commands */
 344 static gint imap_cmd_login      (IMAPSession    *session,
 345                                  const gchar    *user,
 346                                  const gchar    *pass,
 347                                  const gchar    *type);
 348 static gint imap_cmd_noop       (IMAPSession    *session);
 349 #ifdef USE_GNUTLS
 350 static gint imap_cmd_starttls   (IMAPSession    *session);
 351 #endif
 352 static gint imap_cmd_select     (IMAPSession    *session,
 353                                  const gchar    *folder,
 354                                  gint           *exists,
 355                                  gint           *recent,
 356                                  gint           *unseen,
 357                                  guint32        *uid_validity,
 358                                  gint           *can_create_flags,
 359                                  GSList         **ok_flags,
 360                                  gboolean        block);
 361 static gint imap_cmd_close      (IMAPSession    *session);
 362 static gint imap_cmd_examine    (IMAPSession    *session,
 363                                  const gchar    *folder,
 364                                  gint           *exists,
 365                                  gint           *recent,
 366                                  gint           *unseen,
 367                                  guint32        *uid_validity,
 368                                  gboolean        block);
 369 static gint imap_cmd_create     (IMAPSession    *sock,
 370                                  const gchar    *folder);
 371 static gint imap_cmd_rename     (IMAPSession    *sock,
 372                                  const gchar    *oldfolder,
 373                                  const gchar    *newfolder);
 374 static gint imap_cmd_delete     (IMAPSession    *session,
 375                                  const gchar    *folder);
 376 static gint imap_cmd_fetch      (IMAPSession    *sock,
 377                                  guint32         uid,
 378                                  const gchar    *filename,
 379                                  gboolean        headers,
 380                                  gboolean        body);
 381 static gint imap_cmd_append     (IMAPSession    *session,
 382                                  IMAPFolderItem *item,
 383                                  const gchar    *destfolder,
 384                                  const gchar    *file,
 385                                  IMAPFlags       flags,
 386                                  guint32        *new_uid);
 387 static gint imap_cmd_copy       (IMAPSession *session,
 388                                  struct mailimap_set * set,
 389                                  const gchar *destfolder,
 390                                  struct mailimap_set ** source,
 391                                  struct mailimap_set ** dest);
 392 static gint imap_cmd_store      (IMAPSession    *session,
 393                                  IMAPFolderItem *item,
 394                                  struct mailimap_set * set,
 395                                  IMAPFlags flags,
 396                                  GSList *tags,
 397                                  int do_add);
 398 static gint imap_cmd_expunge    (IMAPSession    *session, gboolean force);
 399
 400 static void imap_path_separator_subst           (gchar          *str,
 401                                                  gchar           separator);
 402
 403 static gboolean imap_rename_folder_func         (GNode          *node,
 404                                                  gpointer        data);
 405 static gint imap_get_num_list                   (Folder         *folder,
 406                                                  FolderItem     *item,
 407                                                  GSList        **list,
 408                                                  gboolean       *old_uids_valid);
 409 static GSList *imap_get_msginfos                (Folder         *folder,
 410                                                  FolderItem     *item,
 411                                                  GSList         *msgnum_list);
 412 static MsgInfo *imap_get_msginfo                (Folder         *folder,
 413                                                  FolderItem     *item,
 414                                                  gint            num);
 415 static gboolean imap_scan_required              (Folder         *folder,
 416                                                  FolderItem     *item);
 417 static void imap_change_flags                   (Folder         *folder,
 418                                                  FolderItem     *item,
 419                                                  MsgInfo        *msginfo,
 420                                                  MsgPermFlags    newflags);
 421 static gint imap_get_flags                      (Folder         *folder,
 422                                                  FolderItem     *item,
 423                                                  MsgInfoList    *msglist,
 424                                                  GHashTable     *msgflags);
 425 static gchar *imap_folder_get_path              (Folder         *folder);
 426 static gchar *imap_item_get_path                (Folder         *folder,
 427                                                  FolderItem     *item);
 428 static MsgInfo *imap_parse_msg(const gchar *file, FolderItem *item);
 429
 430
 431 /* data types conversion libetpan <-> claws */
 432 static GSList * imap_list_from_lep(IMAPFolder * folder,
 433                                    clist * list, const gchar * real_path, gboolean all);
 434 static GSList * imap_get_lep_set_from_numlist(IMAPFolder *folder, MsgNumberList *numlist);
 435 static GSList * imap_get_lep_set_from_msglist(IMAPFolder *folder, MsgInfoList *msglist);
 436 static GSList * imap_uid_list_from_lep(clist * list, gint* length);
 437 static GSList * imap_uid_list_from_lep_tab(carray * list);
 438 static void imap_flags_hash_from_lep_uid_flags_tab(carray * list,
 439                                                    GHashTable * hash,
 440                                                    GHashTable *tags_hash);
 441 static MsgInfo *imap_envelope_from_lep(struct imap_fetch_env_info * info,
 442                                        FolderItem *item);
 443 static void imap_lep_set_free(GSList *seq_list);
 444 static struct mailimap_flag_list * imap_flag_to_lep(IMAPFolderItem *item, IMAPFlags flags, GSList *tags);
 445
 446 typedef struct _hashtable_data {
 447         GSList *msglist;
 448         IMAPFolderItem *item;
 449 } hashtable_data;
 450
 451 static FolderClass imap_class;
 452
 453 FolderClass *imap_get_class(void)
 454 {
 455         if (imap_class.idstr == NULL) {
 456                 imap_class.type = F_IMAP;
 457                 imap_class.idstr = "imap";
 458                 imap_class.uistr = "IMAP4";
 459                 imap_class.supports_server_search = TRUE;
 460
 461                 /* Folder functions */
 462                 imap_class.new_folder = imap_folder_new;
 463                 imap_class.destroy_folder = imap_folder_destroy;
 464                 imap_class.scan_tree = imap_scan_tree;
 465                 imap_class.create_tree = imap_create_tree;
 466
 467                 /* FolderItem functions */
 468                 imap_class.item_new = imap_folder_item_new;
 469                 imap_class.item_destroy = imap_folder_item_destroy;
 470                 imap_class.item_get_path = imap_item_get_path;
 471                 imap_class.create_folder = imap_create_folder;
 472                 imap_class.rename_folder = imap_rename_folder;
 473                 imap_class.remove_folder = imap_remove_folder;
 474                 imap_class.close = imap_close;
 475                 imap_class.get_num_list = imap_get_num_list;
 476                 imap_class.scan_required = imap_scan_required;
 477                 imap_class.set_xml = folder_set_xml;
 478                 imap_class.get_xml = folder_get_xml;
 479                 imap_class.item_set_xml = imap_item_set_xml;
 480                 imap_class.item_get_xml = imap_item_get_xml;
 481
 482                 /* Message functions */
 483                 imap_class.get_msginfo = imap_get_msginfo;
 484                 imap_class.get_msginfos = imap_get_msginfos;
 485                 imap_class.fetch_msg = imap_fetch_msg;
 486                 imap_class.fetch_msg_full = imap_fetch_msg_full;
 487                 imap_class.add_msg = imap_add_msg;
 488                 imap_class.add_msgs = imap_add_msgs;
 489                 imap_class.copy_msg = imap_copy_msg;
 490                 imap_class.copy_msgs = imap_copy_msgs;
 491                 imap_class.search_msgs = search_msgs;
 492                 imap_class.remove_msg = imap_remove_msg;
 493                 imap_class.remove_msgs = imap_remove_msgs;
 494                 imap_class.expunge = imap_expunge;
 495                 imap_class.remove_all_msg = imap_remove_all_msg;
 496                 imap_class.is_msg_changed = imap_is_msg_changed;
 497                 imap_class.change_flags = imap_change_flags;
 498                 imap_class.get_flags = imap_get_flags;
 499                 imap_class.set_batch = imap_set_batch;
 500                 imap_class.synchronise = imap_synchronise;
 501                 imap_class.remove_cached_msg = imap_remove_cached_msg;
 502                 imap_class.commit_tags = imap_commit_tags;
 503 #ifdef USE_PTREAD
 504                 pthread_mutex_init(&imap_mutex, NULL);
 505 #endif
 506         }
 507
 508         return &imap_class;
 509 }
 510
 511 static void imap_refresh_sensitivity (IMAPSession *session)
 512 {
 513         MainWindow *mainwin;
 514
 515         if (session->sens_update_block)
 516                 return;
 517         mainwin = mainwindow_get_mainwindow();
 518         if (mainwin) {
 519                 toolbar_main_set_sensitive(mainwin);
 520                 main_window_set_menu_sensitive(mainwin);
 521         }
 522 }
 523
 524 static void lock_session(IMAPSession *session)
 525 {
 526         if (session) {
 527                 debug_print("locking session %p (%d)\n", session, session->busy);
 528                 if (session->busy)
 529                         debug_print("         SESSION WAS LOCKED !!      \n");
 530                 session->busy = TRUE;
 531                 imap_refresh_sensitivity(session);
 532         } else {
 533                 debug_print("can't lock null session\n");
 534         }
 535 }
 536
 537 static void unlock_session(IMAPSession *session)
 538 {
 539         if (session) {
 540                 debug_print("unlocking session %p\n", session);
 541                 session->busy = FALSE;
 542                 imap_refresh_sensitivity(session);
 543         } else {
 544                 debug_print("can't unlock null session\n");
 545         }
 546 }
 547
 548 static gboolean imap_ping(gpointer data)
 549 {
 550         Session *session = (Session *)data;
 551         IMAPSession *imap_session = IMAP_SESSION(session);
 552         int r;
 553
 554         if (session->state != SESSION_READY)
 555                 return FALSE;
 556         if (imap_session->busy || !imap_session->authenticated)
 557                 return TRUE;
 558
 559         lock_session(imap_session);
 560         r = imap_cmd_noop(imap_session);
 561         unlock_session(imap_session);
 562
 563         return r == MAILIMAP_NO_ERROR;
 564 }
 565
 566 static void imap_disc_session_destroy(IMAPSession *session)
 567 {
 568         RemoteFolder *rfolder = NULL;
 569
 570         if (session == NULL)
 571                 return;
 572
 573         rfolder = REMOTE_FOLDER(IMAP_SESSION(session)->folder);
 574
 575         if (rfolder == NULL)
 576                 return;
 577         log_warning(LOG_PROTOCOL, _("IMAP4 connection broken\n"));
 578         SESSION(session)->state = SESSION_DISCONNECTED;
 579         SESSION(session)->sock = NULL;
 580 }
 581
 582 static void imap_safe_destroy(IMAPSession *session)
 583 {
 584         if (!session->busy)
 585                 session_destroy(SESSION(session));
 586         else
 587                 session->do_destroy = TRUE;
 588 }
 589
 590 static gboolean is_fatal(int libetpan_errcode)
 591 {
 592         switch(libetpan_errcode) {
 593         case MAILIMAP_ERROR_STREAM:
 594         case MAILIMAP_ERROR_PROTOCOL:
 595         case MAILIMAP_ERROR_PARSE:
 596         case MAILIMAP_ERROR_BAD_STATE:
 597                 return TRUE;
 598         default:
 599                 return FALSE;
 600         }
 601 }
 602
 603 static void imap_handle_error(Session *session, const gchar *server, int libetpan_errcode)
 604 {
 605         const gchar *session_server = (session ? session->server : NULL);
 606
 607         if (session_server == NULL)
 608                 session_server = server;
 609         if (session_server == NULL)
 610                 session_server = "(null)";
 611
 612         switch(libetpan_errcode) {
 613         case MAILIMAP_NO_ERROR:
 614                 return;
 615         case MAILIMAP_NO_ERROR_AUTHENTICATED:
 616                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: authenticated\n"), session_server);
 617                 break;
 618         case MAILIMAP_NO_ERROR_NON_AUTHENTICATED:
 619                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: not authenticated\n"), session_server);
 620                 break;
 621         case MAILIMAP_ERROR_BAD_STATE:
 622                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: bad state\n"), session_server);
 623                 break;
 624         case MAILIMAP_ERROR_STREAM:
 625                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: stream error\n"), session_server);
 626                 break;
 627         case MAILIMAP_ERROR_PARSE:
 628                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: parse error "
 629                                             "(very probably non-RFC compliance from the server)\n"), session_server);
 630                 break;
 631         case MAILIMAP_ERROR_CONNECTION_REFUSED:
 632                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: connection refused\n"), session_server);
 633                 break;
 634         case MAILIMAP_ERROR_MEMORY:
 635                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: memory error\n"), session_server);
 636                 break;
 637         case MAILIMAP_ERROR_FATAL:
 638                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: fatal error\n"), session_server);
 639                 break;
 640         case MAILIMAP_ERROR_PROTOCOL:
 641                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: protocol error"
 642                                             "(very probably non-RFC compliance from the server)\n"), session_server);
 643                 break;
 644         case MAILIMAP_ERROR_DONT_ACCEPT_CONNECTION:
 645                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: connection not accepted\n"), session_server);
 646                 break;
 647         case MAILIMAP_ERROR_APPEND:
 648                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: APPEND error\n"), session_server);
 649                 break;
 650         case MAILIMAP_ERROR_NOOP:
 651                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: NOOP error\n"), session_server);
 652                 break;
 653         case MAILIMAP_ERROR_LOGOUT:
 654                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: LOGOUT error\n"), session_server);
 655                 break;
 656         case MAILIMAP_ERROR_CAPABILITY:
 657                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: CAPABILITY error\n"), session_server);
 658                 break;
 659         case MAILIMAP_ERROR_CHECK:
 660                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: CHECK error\n"), session_server);
 661                 break;
 662         case MAILIMAP_ERROR_CLOSE:
 663                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: CLOSE error\n"), session_server);
 664                 break;
 665         case MAILIMAP_ERROR_EXPUNGE:
 666                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: EXPUNGE error\n"), session_server);
 667                 break;
 668         case MAILIMAP_ERROR_COPY:
 669                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: COPY error\n"), session_server);
 670                 break;
 671         case MAILIMAP_ERROR_UID_COPY:
 672                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: UID COPY error\n"), session_server);
 673                 break;
 674         case MAILIMAP_ERROR_CREATE:
 675                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: CREATE error\n"), session_server);
 676                 break;
 677         case MAILIMAP_ERROR_DELETE:
 678                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: DELETE error\n"), session_server);
 679                 break;
 680         case MAILIMAP_ERROR_EXAMINE:
 681                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: EXAMINE error\n"), session_server);
 682                 break;
 683         case MAILIMAP_ERROR_FETCH:
 684                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: FETCH error\n"), session_server);
 685                 break;
 686         case MAILIMAP_ERROR_UID_FETCH:
 687                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: UID FETCH error\n"), session_server);
 688                 break;
 689         case MAILIMAP_ERROR_LIST:
 690                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: LIST error\n"), session_server);
 691                 break;
 692         case MAILIMAP_ERROR_LOGIN:
 693                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: LOGIN error\n"), session_server);
 694                 break;
 695         case MAILIMAP_ERROR_LSUB:
 696                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: LSUB error\n"), session_server);
 697                 break;
 698         case MAILIMAP_ERROR_RENAME:
 699                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: RENAME error\n"), session_server);
 700                 break;
 701         case MAILIMAP_ERROR_SEARCH:
 702                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: SEARCH error\n"), session_server);
 703                 break;
 704         case MAILIMAP_ERROR_UID_SEARCH:
 705                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: UID SEARCH error\n"), session_server);
 706                 break;
 707         case MAILIMAP_ERROR_SELECT:
 708                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: SELECT error\n"), session_server);
 709                 break;
 710         case MAILIMAP_ERROR_STATUS:
 711                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: STATUS error\n"), session_server);
 712                 break;
 713         case MAILIMAP_ERROR_STORE:
 714                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: STORE error\n"), session_server);
 715                 break;
 716         case MAILIMAP_ERROR_UID_STORE:
 717                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: UID STORE error\n"), session_server);
 718                 break;
 719         case MAILIMAP_ERROR_SUBSCRIBE:
 720                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: SUBSCRIBE error\n"), session_server);
 721                 break;
 722         case MAILIMAP_ERROR_UNSUBSCRIBE:
 723                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: UNSUBSCRIBE error\n"), session_server);
 724                 break;
 725         case MAILIMAP_ERROR_STARTTLS:
 726                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: STARTTLS error\n"), session_server);
 727                 break;
 728         case MAILIMAP_ERROR_INVAL:
 729                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: INVAL error\n"), session_server);
 730                 break;
 731         case MAILIMAP_ERROR_EXTENSION:
 732                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: EXTENSION error\n"), session_server);
 733                 break;
 734         case MAILIMAP_ERROR_SASL:
 735                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: SASL error\n"), session_server);
 736                 break;
 737 #ifdef USE_GNUTLS
 738         case MAILIMAP_ERROR_SSL:
 739                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: SSL error\n"), session_server);
 740                 break;
 741 #endif
 742         default:
 743                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: Unknown error [%d]\n"),
 744                         session_server, libetpan_errcode);
 745                 break;
 746         }
 747
 748         if (session && is_fatal(libetpan_errcode)) {
 749                 imap_disc_session_destroy(IMAP_SESSION(session));
 750         } else if (session && !is_fatal(libetpan_errcode)) {
 751                 if (IMAP_SESSION(session)->busy)
 752                         unlock_session(IMAP_SESSION(session));
 753         }
 754 }
 755
 756 static Folder *imap_folder_new(const gchar *name, const gchar *path)
 757 {
 758         Folder *folder;
 759
 760         folder = (Folder *)g_new0(IMAPFolder, 1);
 761         folder->klass = &imap_class;
 762         imap_folder_init(folder, name, path);
 763
 764         return folder;
 765 }
 766
 767 static void imap_folder_destroy(Folder *folder)
 768 {
 769         while (imap_folder_get_refcnt(folder) > 0)
 770                 gtk_main_iteration();
 771
 772         g_free(IMAP_FOLDER(folder)->search_charset);
 773
 774         folder_remote_folder_destroy(REMOTE_FOLDER(folder));
 775         imap_done(folder);
 776 }
 777
 778 static void imap_folder_init(Folder *folder, const gchar *name,
 779                              const gchar *path)
 780 {
 781         folder_remote_folder_init((Folder *)folder, name, path);
 782         IMAP_FOLDER(folder)->max_set_size = IMAP_SET_MAX_COUNT;
 783         IMAP_FOLDER(folder)->search_charset_supported = TRUE;
 784         IMAP_FOLDER(folder)->search_charset = g_strdup(conv_get_locale_charset_str_no_utf8());
 785 }
 786
 787 static FolderItem *imap_folder_item_new(Folder *folder)
 788 {
 789         IMAPFolderItem *item;
 790
 791         item = g_new0(IMAPFolderItem, 1);
 792         item->lastuid = 0;
 793         item->uid_next = 0;
 794         item->uid_list = NULL;
 795
 796         return (FolderItem *)item;
 797 }
 798
 799 static void imap_folder_item_destroy(Folder *folder, FolderItem *_item)
 800 {
 801         IMAPFolderItem *item = (IMAPFolderItem *)_item;
 802
 803         g_return_if_fail(item != NULL);
 804         g_slist_free(item->uid_list);
 805
 806         g_free(_item);
 807 }
 808
 809 static gboolean imap_reset_uid_lists_func(GNode *node, gpointer data)
 810 {
 811         IMAPFolderItem *item = (IMAPFolderItem *)node->data;
 812
 813         item->lastuid = 0;
 814         g_slist_free(item->uid_list);
 815         item->uid_list = NULL;
 816
 817         return FALSE;
 818 }
 819
 820 static void imap_reset_uid_lists(Folder *folder)
 821 {
 822         if(folder->node == NULL)
 823                 return;
 824
 825         /* Destroy all uid lists and rest last uid */
 826         g_node_traverse(folder->node, G_IN_ORDER, G_TRAVERSE_ALL, -1, imap_reset_uid_lists_func, NULL);
 827 }
 828
 829 static int imap_get_capabilities(IMAPSession *session)
 830 {
 831         struct mailimap_capability_data *capabilities = NULL;
 832         clistiter *cur;
 833         int result = -1;
 834
 835         if (session->capability != NULL)
 836                 return MAILIMAP_NO_ERROR;
 837
 838         capabilities = imap_threaded_capability(session->folder, &result);
 839
 840         if (result != MAILIMAP_NO_ERROR) {
 841                 return result;
 842         }
 843
 844         if (capabilities == NULL || capabilities->cap_list == NULL) {
 845                 return MAILIMAP_NO_ERROR;
 846         }
 847
 848         for(cur = clist_begin(capabilities->cap_list) ; cur != NULL ;
 849             cur = clist_next(cur)) {
 850                 struct mailimap_capability * cap =
 851                         clist_content(cur);
 852                 if (!cap || cap->cap_data.cap_name == NULL)
 853                         continue;
 854                 session->capability = g_slist_append
 855                                 (session->capability,
 856                                  g_strdup(cap->cap_data.cap_name));
 857                 debug_print("got capa %s\n", cap->cap_data.cap_name);
 858         }
 859         mailimap_capability_data_free(capabilities);
 860         return MAILIMAP_NO_ERROR;
 861 }
 862
 863 static gboolean imap_has_capability(IMAPSession *session, const gchar *cap)
 864 {
 865         GSList *cur;
 866         for (cur = session->capability; cur; cur = cur->next) {
 867                 if (!g_ascii_strcasecmp(cur->data, cap))
 868                         return TRUE;
 869         }
 870         return FALSE;
 871 }
 872
 873 static gint imap_auth(IMAPSession *session, const gchar *user, const gchar *pass,
 874                       IMAPAuthType type)
 875 {
 876         gint ok = MAILIMAP_ERROR_LOGIN;
 877         static time_t last_login_err = 0;
 878         gchar *ext_info = "";
 879         int r;
 880         gchar *server = NULL;
 881         if ((r = imap_get_capabilities(session)) != MAILIMAP_NO_ERROR) {
 882                 imap_handle_error(SESSION(session), NULL, r);
 883                 return r;
 884         }
 885         server = g_strdup(SESSION(session)->server);
 886         switch(type) {
 887         case IMAP_AUTH_ANON:
 888                 ok = imap_cmd_login(session, user, pass, "ANONYMOUS");
 889                 break;
 890         case IMAP_AUTH_CRAM_MD5:
 891                 ok = imap_cmd_login(session, user, pass, "CRAM-MD5");
 892                 break;
 893         case IMAP_AUTH_DIGEST_MD5:
 894                 ok = imap_cmd_login(session, user, pass, "DIGEST-MD5");
 895                 break;
 896         case IMAP_AUTH_LOGIN:
 897                 ok = imap_cmd_login(session, user, pass, "LOGIN");
 898                 break;
 899         case IMAP_AUTH_GSSAPI:
 900                 ok = imap_cmd_login(session, user, pass, "GSSAPI");
 901                 break;
 902         default:
 903                 debug_print("capabilities:\n"
 904                                 "\t ANONYMOUS %d\n"
 905                                 "\t CRAM-MD5 %d\n"
 906                                 "\t DIGEST-MD5 %d\n"
 907                                 "\t LOGIN %d\n"
 908                                 "\t GSSAPI %d\n",
 909                         imap_has_capability(session, "ANONYMOUS"),
 910                         imap_has_capability(session, "CRAM-MD5"),
 911                         imap_has_capability(session, "DIGEST-MD5"),
 912                         imap_has_capability(session, "LOGIN"),
 913                         imap_has_capability(session, "GSSAPI"));
 914                 if (imap_has_capability(session, "CRAM-MD5"))
 915                         ok = imap_cmd_login(session, user, pass, "CRAM-MD5");
 916                 if (ok == MAILIMAP_ERROR_LOGIN && imap_has_capability(session, "DIGEST-MD5"))
 917                         ok = imap_cmd_login(session, user, pass, "DIGEST-MD5");
 918                 if (ok == MAILIMAP_ERROR_LOGIN && imap_has_capability(session, "GSSAPI"))
 919                         ok = imap_cmd_login(session, user, pass, "GSSAPI");
 920                 if (ok == MAILIMAP_ERROR_LOGIN) /* we always try LOGIN before giving up */
 921                         ok = imap_cmd_login(session, user, pass, "LOGIN");
 922         }
 923
 924         if (ok == MAILIMAP_NO_ERROR)
 925                 session->authenticated = TRUE;
 926         else {
 927                 if (type == IMAP_AUTH_CRAM_MD5) {
 928                         ext_info = _("\n\nCRAM-MD5 logins only work if libetpan has been "
 929                                      "compiled with SASL support and the "
 930                                      "CRAM-MD5 SASL plugin is installed.");
 931                 }
 932
 933                 if (type == IMAP_AUTH_DIGEST_MD5) {
 934                         ext_info = _("\n\nDIGEST-MD5 logins only work if libetpan has been "
 935                                      "compiled with SASL support and the "
 936                                      "DIGEST-MD5 SASL plugin is installed.");
 937                 }
 938
 939                 if (time(NULL) - last_login_err > 10) {
 940                         if (!prefs_common.no_recv_err_panel) {
 941                                 alertpanel_error_log(_("Connection to %s failed: "
 942                                         "login refused.%s"),
 943                                         server, ext_info);
 944                         } else {
 945                                 log_error(LOG_PROTOCOL, _("Connection to %s failed: "
 946                                         "login refused.%s\n"),
 947                                         server, ext_info);
 948                         }
 949                 }
 950                 last_login_err = time(NULL);
 951         }
 952         g_free(server);
 953         return ok;
 954 }
 955
 956 static IMAPSession *imap_reconnect_if_possible(Folder *folder, IMAPSession *session)
 957 {
 958         RemoteFolder *rfolder = REMOTE_FOLDER(folder);
 959         /* Check if this is the first try to establish a
 960            connection, if yes we don't try to reconnect */
 961         debug_print("reconnecting\n");
 962         if (rfolder->session == NULL) {
 963                 log_warning(LOG_PROTOCOL, _("Connecting to %s failed"),
 964                             folder->account->recv_server);
 965                 SESSION(session)->sock = NULL;
 966                 imap_safe_destroy(session);
 967                 session = NULL;
 968         } else {
 969                 rfolder->session = NULL;
 970                 log_warning(LOG_PROTOCOL, _("IMAP4 connection to %s has been"
 971                             " disconnected. Reconnecting...\n"),
 972                             folder->account->recv_server);
 973                 statusbar_print_all(_("IMAP4 connection to %s has been"
 974                             " disconnected. Reconnecting...\n"),
 975                             folder->account->recv_server);
 976                 SESSION(session)->state = SESSION_DISCONNECTED;
 977                 SESSION(session)->sock = NULL;
 978                 imap_safe_destroy(session);
 979                 /* Clear folders session to make imap_session_get create
 980                    a new session, because of rfolder->session == NULL
 981                    it will not try to reconnect again and so avoid an
 982                    endless loop */
 983                 debug_print("getting session...\n");
 984                 session = imap_session_get(folder);
 985                 rfolder->session = SESSION(session);
 986                 statusbar_pop_all();
 987         }
 988         return session;
 989 }
 990
 991 static IMAPSession *imap_session_get(Folder *folder)
 992 {
 993         RemoteFolder *rfolder = REMOTE_FOLDER(folder);
 994         IMAPSession *session = NULL;
 995         gint r = MAILIMAP_NO_ERROR;
 996
 997         g_return_val_if_fail(folder != NULL, NULL);
 998         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, NULL);
 999         g_return_val_if_fail(folder->account != NULL, NULL);
1000
1001         if (prefs_common.work_offline &&
1002             !inc_offline_should_override(FALSE,
1003                 _("Claws Mail needs network access in order "
1004                   "to access the IMAP server."))) {
1005                 return NULL;
1006         }
1007
1008         /* check for deferred destroy */
1009         if (rfolder->session != NULL) {
1010                 session = IMAP_SESSION(rfolder->session);
1011                 if (!session->busy && session->do_destroy) {
1012                         rfolder->session = NULL;
1013                         imap_safe_destroy(session);
1014                         session = NULL;
1015                 }
1016         }
1017
1018         /* Make sure we have a session */
1019         if (rfolder->session != NULL && rfolder->session->state != SESSION_DISCONNECTED) {
1020                 session = IMAP_SESSION(rfolder->session);
1021         } else if (rfolder->session != NULL && rfolder->session->state == SESSION_DISCONNECTED) {
1022                 imap_safe_destroy(IMAP_SESSION(rfolder->session));
1023                 rfolder->session = NULL;
1024                 goto new_conn;
1025         } else if (rfolder->connecting) {
1026                 debug_print("already connecting\n");
1027                 return NULL;
1028         } else {
1029 new_conn:
1030                 imap_reset_uid_lists(folder);
1031                 if (time(NULL) - rfolder->last_failure <= 2)
1032                         return NULL;
1033                 rfolder->connecting = TRUE;
1034                 session = imap_session_new(folder, folder->account);
1035         }
1036         if(session == NULL) {
1037                 rfolder->last_failure = time(NULL);
1038                 rfolder->connecting = FALSE;
1039                 return NULL;
1040         }
1041
1042         /* Make sure session is authenticated */
1043         if (!IMAP_SESSION(session)->authenticated)
1044                 r = imap_session_authenticate(IMAP_SESSION(session), folder->account);
1045
1046         if (r != MAILIMAP_NO_ERROR || (!is_fatal(r) && !IMAP_SESSION(session)->authenticated)) {
1047                 rfolder->session = NULL;
1048                 if (!is_fatal(r)) {
1049                         imap_threaded_disconnect(session->folder);
1050                 }
1051                 SESSION(session)->state = SESSION_DISCONNECTED;
1052                 SESSION(session)->sock = NULL;
1053                 imap_safe_destroy(session);
1054                 rfolder->last_failure = time(NULL);
1055                 rfolder->connecting = FALSE;
1056                 return NULL;
1057         }
1058
1059         /* I think the point of this code is to avoid sending a
1060          * keepalive if we've used the session recently and therefore
1061          * think it's still alive.  Unfortunately, most of the code
1062          * does not yet check for errors on the socket, and so if the
1063          * connection drops we don't notice until the timeout expires.
1064          * A better solution than sending a NOOP every time would be
1065          * for every command to be prepared to retry until it is
1066          * successfully sent. -- mbp */
1067         if ((time(NULL) - SESSION(session)->last_access_time > SESSION_TIMEOUT_INTERVAL) || session->cancelled) {
1068                 /* verify that the session is still alive */
1069                 r = imap_cmd_noop(session);
1070
1071                 if (r != MAILIMAP_NO_ERROR) {
1072                         debug_print("disconnected!\n");
1073                         if (!is_fatal(r))
1074                                 session = imap_reconnect_if_possible(folder, session);
1075                         else {
1076                                 rfolder->session = NULL;
1077                                 rfolder->connecting = FALSE;
1078                                 SESSION(session)->state = SESSION_DISCONNECTED;
1079                                 SESSION(session)->sock = NULL;
1080                                 imap_safe_destroy(session);
1081                                 session = imap_session_get(folder);
1082                         }
1083                 }
1084                 if (session)
1085                         session->cancelled = FALSE;
1086         }
1087
1088         rfolder->session = SESSION(session);
1089         rfolder->connecting = FALSE;
1090
1091         return IMAP_SESSION(session);
1092 }
1093
1094 static IMAPSession *imap_session_new(Folder * folder,
1095                                      const PrefsAccount *account)
1096 {
1097         IMAPSession *session;
1098         gushort port;
1099         int r;
1100         int authenticated = FALSE;
1101         gchar *buf;
1102
1103 #ifdef USE_GNUTLS
1104         /* FIXME: IMAP over SSL only... */
1105         SSLType ssl_type;
1106
1107         port = account->set_imapport ? account->imapport
1108                 : account->ssl_imap == SSL_TUNNEL ? IMAPS_PORT : IMAP4_PORT;
1109         ssl_type = account->ssl_imap;
1110 #else
1111         if (account->ssl_imap != SSL_NONE) {
1112                 if (alertpanel_full(_("Insecure connection"),
1113                         _("This connection is configured to be secured "
1114                           "using SSL, but SSL is not available in this "
1115                           "build of Claws Mail. \n\n"
1116                           "Do you want to continue connecting to this "
1117                           "server? The communication would not be "
1118                           "secure."),
1119                           GTK_STOCK_CANCEL, _("Con_tinue connecting"),
1120                           NULL, FALSE, NULL, ALERT_WARNING,
1121                           G_ALERTDEFAULT) != G_ALERTALTERNATE)
1122                         return NULL;
1123         }
1124         port = account->set_imapport ? account->imapport
1125                 : IMAP4_PORT;
1126 #endif
1127
1128         imap_init(folder);
1129         buf = g_strdup_printf(_("Account '%s': Connecting to IMAP4 server: %s:%d..."),
1130                                 folder->account->account_name, folder->account->recv_server,
1131                                 port);
1132         statuswindow_print_all("%s", buf);
1133         log_message(LOG_PROTOCOL, "%s\n", buf);
1134         g_free(buf);
1135
1136 #ifndef G_OS_WIN32
1137         if (account->set_tunnelcmd) {
1138                 r = imap_threaded_connect_cmd(folder,
1139                                               account->tunnelcmd,
1140                                               account->recv_server,
1141                                               port);
1142         }
1143         else
1144 #endif
1145         {
1146 #ifdef USE_GNUTLS
1147                 if (ssl_type == SSL_TUNNEL) {
1148                         r = imap_threaded_connect_ssl(folder,
1149                                                       account->recv_server,
1150                                                       port);
1151                 }
1152                 else
1153 #endif
1154                 {
1155                         r = imap_threaded_connect(folder,
1156                                                   account->recv_server,
1157                                                   port);
1158                 }
1159         }
1160
1161         statuswindow_pop_all();
1162         if (r == MAILIMAP_NO_ERROR_AUTHENTICATED) {
1163                 authenticated = TRUE;
1164         }
1165         else if (r == MAILIMAP_NO_ERROR_NON_AUTHENTICATED) {
1166                 authenticated = FALSE;
1167         }
1168         else {
1169 #ifdef USE_GNUTLS
1170                 if (r == MAILIMAP_ERROR_SSL)
1171                         log_error(LOG_PROTOCOL, _("SSL handshake failed\n"));
1172                 else
1173 #endif
1174                         imap_handle_error(NULL, account->recv_server, r);
1175
1176                 if(!prefs_common.no_recv_err_panel) {
1177                         alertpanel_error_log(_("Can't connect to IMAP4 server: %s:%d"),
1178                                          account->recv_server, port);
1179                 } else {
1180                         log_error(LOG_PROTOCOL, _("Can't connect to IMAP4 server: %s:%d\n"),
1181                                          account->recv_server, port);
1182                 }
1183
1184                 return NULL;
1185         }
1186
1187         session = g_new0(IMAPSession, 1);
1188         session_init(SESSION(session), account, FALSE);
1189         SESSION(session)->type             = SESSION_IMAP;
1190         SESSION(session)->server           = g_strdup(account->recv_server);
1191         SESSION(session)->port             = port;
1192         SESSION(session)->sock             = NULL;
1193
1194         SESSION(session)->destroy          = imap_session_destroy;
1195
1196         session->capability = NULL;
1197
1198         session->authenticated = authenticated;
1199         session->mbox = NULL;
1200         session->exists = 0;
1201         session->recent = 0;
1202         session->expunge = 0;
1203         session->cmd_count = 0;
1204         session->folder = folder;
1205         IMAP_FOLDER(session->folder)->last_seen_separator = 0;
1206
1207 #ifdef USE_GNUTLS
1208         if (account->ssl_imap == SSL_STARTTLS) {
1209                 gint ok;
1210
1211                 ok = imap_cmd_starttls(session);
1212                 if (ok != MAILIMAP_NO_ERROR) {
1213                         log_warning(LOG_PROTOCOL, _("Can't start TLS session.\n"));
1214                         if (!is_fatal(ok)) {
1215                                 SESSION(session)->sock = NULL;
1216                                 imap_safe_destroy(session);
1217                         }
1218                         return NULL;
1219                 }
1220
1221                 imap_free_capabilities(session);
1222                 session->authenticated = FALSE;
1223                 session->uidplus = FALSE;
1224                 session->cmd_count = 1;
1225         }
1226 #endif
1227         log_message(LOG_PROTOCOL, "IMAP connection is %s-authenticated\n",
1228                     (session->authenticated) ? "pre" : "un");
1229
1230         session_register_ping(SESSION(session), imap_ping);
1231
1232         return session;
1233 }
1234
1235 static gint imap_session_authenticate(IMAPSession *session,
1236                                       PrefsAccount *account)
1237 {
1238         gchar *pass, *acc_pass;
1239         gboolean failed = FALSE;
1240         gint ok = MAILIMAP_NO_ERROR;
1241         g_return_val_if_fail(account->userid != NULL, MAILIMAP_ERROR_BAD_STATE);
1242
1243         if (password_get(account->userid, account->recv_server, "imap",
1244                          SESSION(session)->port, &pass)) {
1245                 Xstrdup_a(acc_pass, pass, {g_free(pass); return MAILIMAP_NO_ERROR;});
1246                 g_free(pass);
1247         } else {
1248                 acc_pass = account->passwd;
1249         }
1250 try_again:
1251         pass = acc_pass;
1252         if (!pass && account->imap_auth_type != IMAP_AUTH_ANON && account->imap_auth_type != IMAP_AUTH_GSSAPI) {
1253                 gchar *tmp_pass;
1254                 tmp_pass = input_dialog_query_password_keep(account->recv_server,
1255                                                             account->userid,
1256                                                             &(account->session_passwd));
1257                 if (!tmp_pass)
1258                         return MAILIMAP_NO_ERROR;
1259                 Xstrdup_a(pass, tmp_pass, {g_free(tmp_pass); return MAILIMAP_NO_ERROR;});
1260                 g_free(tmp_pass);
1261         } else if (account->imap_auth_type == IMAP_AUTH_ANON || account->imap_auth_type == IMAP_AUTH_GSSAPI) {
1262                 pass = "";
1263         }
1264         if ((ok = imap_auth(session, account->userid, pass, account->imap_auth_type)) != MAILIMAP_NO_ERROR) {
1265
1266                 if (!failed && !is_fatal(ok)) {
1267                         acc_pass = NULL;
1268                         failed = TRUE;
1269                         if (account->session_passwd != NULL) {
1270                                 g_free(account->session_passwd);
1271                                 account->session_passwd = NULL;
1272                         }
1273                         goto try_again;
1274                 } else {
1275                         if (prefs_common.no_recv_err_panel) {
1276                                 log_error(LOG_PROTOCOL, _("Couldn't login to IMAP server %s.\n"), account->recv_server);
1277                                 mainwindow_show_error();
1278                         } else
1279                                 alertpanel_error_log(_("Couldn't login to IMAP server %s."), account->recv_server);
1280                 }
1281
1282                 return ok;
1283         }
1284
1285         statuswindow_pop_all();
1286         session->authenticated = TRUE;
1287         return MAILIMAP_NO_ERROR;
1288 }
1289
1290 static void imap_session_destroy(Session *session)
1291 {
1292         if (session->state != SESSION_DISCONNECTED)
1293                 imap_threaded_disconnect(IMAP_SESSION(session)->folder);
1294
1295         imap_free_capabilities(IMAP_SESSION(session));
1296         g_free(IMAP_SESSION(session)->mbox);
1297 }
1298
1299 static gchar *imap_fetch_msg(Folder *folder, FolderItem *item, gint uid)
1300 {
1301         return imap_fetch_msg_full(folder, item, uid, TRUE, TRUE);
1302 }
1303
1304 static guint get_file_size_with_crs(const gchar *filename)
1305 {
1306         FILE *fp = NULL;
1307         guint cnt = 0;
1308         gchar buf[4096];
1309
1310         if (filename == NULL)
1311                 return -1;
1312
1313         fp = g_fopen(filename, "rb");
1314         if (!fp)
1315                 return -1;
1316
1317         while (fgets(buf, sizeof (buf), fp) != NULL) {
1318                 cnt += strlen(buf);
1319                 if (!strstr(buf, "\r\n") && strstr(buf, "\n"))
1320                         cnt++;
1321         }
1322
1323         fclose(fp);
1324         return cnt;
1325 }
1326
1327 static void imap_remove_cached_msg(Folder *folder, FolderItem *item, MsgInfo *msginfo)
1328 {
1329         gchar *path, *filename;
1330
1331         path = folder_item_get_path(item);
1332
1333         if (!is_dir_exist(path)) {
1334                 g_free(path);
1335                 return;
1336         }
1337
1338         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(msginfo->msgnum), NULL);
1339         g_free(path);
1340
1341         if (is_file_exist(filename)) {
1342                 claws_unlink(filename);
1343         }
1344         g_free(filename);
1345 }
1346
1347 typedef struct _TagsData {
1348         gchar *str;
1349         GSList *msglist;
1350         IMAPFolderItem *item;
1351 } TagsData;
1352
1353 static void imap_commit_tags(FolderItem *item, MsgInfo *msginfo, GSList *tags_set, GSList *tags_unset)
1354 {
1355         IMAPSession *session;
1356         gint ok, can_create_tags;
1357         Folder *folder = NULL;
1358         TagsData *ht_data = NULL;
1359         GSList *cur;
1360
1361         g_return_if_fail(item != NULL);
1362         g_return_if_fail(msginfo != NULL);
1363
1364         folder = item->folder;
1365         debug_print("getting session...\n");
1366         session = imap_session_get(folder);
1367
1368         if (!session) {
1369                 debug_print("can't get session\n");
1370                 return;
1371         }
1372
1373         ok = imap_select(session, IMAP_FOLDER(folder), item,
1374                          NULL, NULL, NULL, NULL, &can_create_tags, FALSE);
1375
1376         if (ok != MAILIMAP_NO_ERROR) {
1377                 return;
1378         }
1379
1380
1381         if (IMAP_FOLDER_ITEM(item)->can_create_flags != ITEM_CAN_CREATE_FLAGS)
1382                 return;
1383
1384         if (IMAP_FOLDER_ITEM(item)->batching) {
1385                 /* instead of performing an UID STORE command for each message change,
1386                  * as a lot of them can change "together", we just fill in hashtables
1387                  * and defer the treatment so that we're able to send only one
1388                  * command.
1389                  */
1390                 debug_print("IMAP batch mode on, deferring tags change\n");
1391                 for (cur = tags_set; cur; cur = cur->next) {
1392                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1393                         if (cur_tag) {
1394                                 ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->tags_set_table,
1395                                         GINT_TO_POINTER(cur_tag));
1396                                 if (ht_data == NULL) {
1397                                         ht_data = g_new0(TagsData, 1);
1398                                         ht_data->str = g_strdup(tags_get_tag(cur_tag));
1399                                         ht_data->item = IMAP_FOLDER_ITEM(item);
1400                                         g_hash_table_insert(IMAP_FOLDER_ITEM(item)->tags_set_table,
1401                                                 GINT_TO_POINTER(cur_tag), ht_data);
1402                                 }
1403                                 ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
1404                         }
1405                 }
1406                 for (cur = tags_unset; cur; cur = cur->next) {
1407                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1408                         if (cur_tag) {
1409                                 ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->tags_unset_table,
1410                                         GINT_TO_POINTER(cur_tag));
1411                                 if (ht_data == NULL) {
1412                                         ht_data = g_new0(TagsData, 1);
1413                                         ht_data->str = g_strdup(tags_get_tag(cur_tag));
1414                                         ht_data->item = IMAP_FOLDER_ITEM(item);
1415                                         g_hash_table_insert(IMAP_FOLDER_ITEM(item)->tags_unset_table,
1416                                                 GINT_TO_POINTER(cur_tag), ht_data);
1417                                 }
1418                                 ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
1419                         }
1420                 }
1421         } else {
1422                 GSList *list_set = NULL;
1423                 GSList *list_unset = NULL;
1424                 GSList numlist;
1425
1426                 numlist.data = GINT_TO_POINTER(msginfo->msgnum);
1427                 numlist.next = NULL;
1428
1429                 debug_print("IMAP changing tags NOW\n");
1430                 for (cur = tags_set; cur; cur = cur->next) {
1431                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1432                         const gchar *str = tags_get_tag(cur_tag);
1433                         if (IS_NOT_RESERVED_TAG(str))
1434                                 list_set = g_slist_prepend(list_set, g_strdup(str));
1435                 }
1436                 if (list_set) {
1437                         ok = imap_set_message_flags(session,
1438                                 IMAP_FOLDER_ITEM(item), &numlist, 0, list_set, TRUE);
1439                         slist_free_strings_full(list_set);
1440                         if (ok != MAILIMAP_NO_ERROR) {
1441                                 return;
1442                         }
1443                 }
1444
1445                 for (cur = tags_unset; cur; cur = cur->next) {
1446                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1447                         const gchar *str = tags_get_tag(cur_tag);
1448                         if (IS_NOT_RESERVED_TAG(str))
1449                                 list_unset = g_slist_prepend(list_unset, g_strdup(str));
1450                 }
1451                 if (list_unset) {
1452                         ok = imap_set_message_flags(session,
1453                                 IMAP_FOLDER_ITEM(item), &numlist, 0, list_unset, FALSE);
1454                         slist_free_strings_full(list_unset);
1455                         if (ok != MAILIMAP_NO_ERROR) {
1456                                 return;
1457                         }
1458                 }
1459         }
1460 }
1461
1462 static gchar *imap_fetch_msg_full(Folder *folder, FolderItem *item, gint uid,
1463                                   gboolean headers, gboolean body)
1464 {
1465         gchar *path, *filename;
1466         IMAPSession *session;
1467         gint ok;
1468
1469         g_return_val_if_fail(folder != NULL, NULL);
1470         g_return_val_if_fail(item != NULL, NULL);
1471
1472         if (uid == 0)
1473                 return NULL;
1474
1475         path = folder_item_get_path(item);
1476         if (!is_dir_exist(path))
1477                 make_dir_hier(path);
1478         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(uid), NULL);
1479         g_free(path);
1480         debug_print("trying to fetch cached %s\n", filename);
1481         if (is_file_exist(filename)) {
1482                 /* see whether the local file represents the whole message
1483                  * or not. As the IMAP server reports size with \r chars,
1484                  * we have to update the local file (UNIX \n only) size */
1485                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1486                 guint have_size = -1;
1487
1488                 if (cached)
1489                         debug_print("message %d has been already %scached.\n", uid,
1490                                 MSG_IS_FULLY_CACHED(cached->flags) ? "fully ":"");
1491
1492                 if (!cached || !MSG_IS_FULLY_CACHED(cached->flags)) {
1493                         have_size = get_file_size_with_crs(filename);
1494                         if (cached && (cached->size <= have_size || !body)) {
1495                                 ok = file_strip_crs(filename);
1496                                 if (ok == 0 && cached && cached->size <= have_size) {
1497                                         /* we have it all and stripped */
1498                                         debug_print("...fully cached in fact (%u/%zd); setting flag.\n",
1499                                                         have_size, cached->size);
1500                                         procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1501                                 }
1502                                 procmsg_msginfo_free(cached);
1503                                 return filename;
1504                         } else if (!cached && time(NULL) - get_file_mtime(filename) < 60) {
1505                                 debug_print("message not cached and file recent, considering file complete\n");
1506                                 ok = file_strip_crs(filename);
1507                                 if (ok == 0)
1508                                         return filename;
1509                         } else {
1510                                 procmsg_msginfo_free(cached);
1511                         }
1512                 }
1513                 if (cached && MSG_IS_FULLY_CACHED(cached->flags)) {
1514                         procmsg_msginfo_free(cached);
1515                         return filename;
1516                 }
1517         } else {
1518                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1519                 if (cached) {
1520                         procmsg_msginfo_unset_flags(cached, MSG_FULLY_CACHED, 0);
1521                         procmsg_msginfo_free(cached);
1522                 }
1523         }
1524
1525         debug_print("getting session...\n");
1526         session = imap_session_get(folder);
1527
1528         if (!session) {
1529                 g_free(filename);
1530                 return NULL;
1531         }
1532         session_set_access_time(SESSION(session));
1533         lock_session(session); /* unlocked later in the function */
1534
1535         debug_print("IMAP fetching messages\n");
1536         ok = imap_select(session, IMAP_FOLDER(folder), item,
1537                          NULL, NULL, NULL, NULL, NULL, FALSE);
1538         if (ok != MAILIMAP_NO_ERROR) {
1539                 g_warning("can't select mailbox %s\n", item->path);
1540                 g_free(filename);
1541                 return NULL;
1542         }
1543
1544         session_set_access_time(SESSION(session));
1545
1546         debug_print("getting message %d...\n", uid);
1547         ok = imap_cmd_fetch(session, (guint32)uid, filename, headers, body);
1548
1549         if (ok != MAILIMAP_NO_ERROR) {
1550                 g_warning("can't fetch message %d\n", uid);
1551                 g_free(filename);
1552                 return NULL;
1553         }
1554
1555         session_set_access_time(SESSION(session));
1556         unlock_session(session);
1557
1558         ok = file_strip_crs(filename);
1559
1560         if (ok == 0 && headers && body) {
1561                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1562                 if (cached) {
1563                         procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1564                         procmsg_msginfo_free(cached);
1565                 }
1566         } else if (ok == -1) {
1567                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1568                 if (cached) {
1569                         procmsg_msginfo_unset_flags(cached, MSG_FULLY_CACHED, 0);
1570                         procmsg_msginfo_free(cached);
1571                 }
1572         }
1573         return filename;
1574 }
1575
1576 static gboolean imap_is_msg_fully_cached(Folder *folder, FolderItem *item, gint uid)
1577 {
1578         gchar *path, *filename;
1579         guint size = 0;
1580         MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1581
1582         if (!cached)
1583                 return FALSE;
1584
1585         if (MSG_IS_FULLY_CACHED(cached->flags)) {
1586                 procmsg_msginfo_free(cached);
1587                 return TRUE;
1588         }
1589         path = folder_item_get_path(item);
1590         if (!is_dir_exist(path)) {
1591                 g_free(path);
1592                 return FALSE;
1593         }
1594
1595         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(uid), NULL);
1596         g_free(path);
1597         if (is_file_exist(filename)) {
1598                 if (cached && cached->total_size == cached->size) {
1599                         /* fast path */
1600                         g_free(filename);
1601                         procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1602                         return TRUE;
1603                 }
1604                 size = get_file_size_with_crs(filename);
1605         }
1606         g_free(filename);
1607         debug_print("msg %d cached, has size %d, full should be %zd.\n", uid, size, cached->size);
1608         if (cached && size >= cached->size) {
1609                 cached->total_size = cached->size;
1610                 procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1611                 procmsg_msginfo_free(cached);
1612                 return TRUE;
1613         }
1614         if (cached)
1615                 procmsg_msginfo_free(cached);
1616         return FALSE;
1617 }
1618
1619 void imap_cache_msg(FolderItem *item, gint msgnum)
1620 {
1621         Folder *folder = NULL;
1622
1623         if (!item)
1624                 return;
1625         folder = item->folder;
1626
1627         if (!imap_is_msg_fully_cached(folder, item, msgnum)) {
1628                 gchar *tmp = imap_fetch_msg_full(folder, item, msgnum, TRUE, TRUE);
1629                 debug_print("fetched %s\n", tmp);
1630                 g_free(tmp);
1631         }
1632 }
1633
1634 static gint imap_add_msg(Folder *folder, FolderItem *dest,
1635                          const gchar *file, MsgFlags *flags)
1636 {
1637         gint ret;
1638         GSList file_list;
1639         MsgFileInfo fileinfo;
1640
1641         g_return_val_if_fail(file != NULL, -1);
1642
1643         fileinfo.msginfo = NULL;
1644         fileinfo.file = (gchar *)file;
1645         fileinfo.flags = flags;
1646         file_list.data = &fileinfo;
1647         file_list.next = NULL;
1648
1649         ret = imap_add_msgs(folder, dest, &file_list, NULL);
1650         return ret;
1651 }
1652
1653 static gint imap_add_msgs(Folder *folder, FolderItem *dest, GSList *file_list,
1654                    GHashTable *relation)
1655 {
1656         gchar *destdir;
1657         IMAPSession *session;
1658         guint32 last_uid = 0;
1659         GSList *cur;
1660         MsgFileInfo *fileinfo;
1661         gint ok = MAILIMAP_NO_ERROR;
1662         gint curnum = 0, total = 0;
1663         gboolean missing_uids = FALSE;
1664
1665         g_return_val_if_fail(folder != NULL, -1);
1666         g_return_val_if_fail(dest != NULL, -1);
1667         g_return_val_if_fail(file_list != NULL, -1);
1668
1669         debug_print("getting session...\n");
1670         session = imap_session_get(folder);
1671         if (!session) {
1672                 return -1;
1673         }
1674         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
1675         if (is_fatal(ok)) {
1676                 g_free(destdir);
1677                 return -1;
1678         }
1679         statusbar_print_all(_("Adding messages..."));
1680         total = g_slist_length(file_list);
1681         for (cur = file_list; cur != NULL; cur = cur->next) {
1682                 IMAPFlags iflags = 0;
1683                 guint32 new_uid = 0;
1684                 gchar *real_file = NULL;
1685                 fileinfo = (MsgFileInfo *)cur->data;
1686
1687                 statusbar_progress_all(curnum, total, total < 10 ? 1:10);
1688                 curnum++;
1689
1690                 if (fileinfo->flags) {
1691                         if (MSG_IS_MARKED(*fileinfo->flags))
1692                                 iflags |= IMAP_FLAG_FLAGGED;
1693                         if (MSG_IS_REPLIED(*fileinfo->flags))
1694                                 iflags |= IMAP_FLAG_ANSWERED;
1695                         if (MSG_IS_FORWARDED(*fileinfo->flags))
1696                                 iflags |= IMAP_FLAG_FORWARDED;
1697                         if (MSG_IS_SPAM(*fileinfo->flags))
1698                                 iflags |= IMAP_FLAG_SPAM;
1699                         else
1700                                 iflags |= IMAP_FLAG_HAM;
1701                         if (!MSG_IS_UNREAD(*fileinfo->flags))
1702                                 iflags |= IMAP_FLAG_SEEN;
1703
1704                 }
1705
1706                 if (real_file == NULL)
1707                         real_file = g_strdup(fileinfo->file);
1708
1709                 if (folder_has_parent_of_type(dest, F_QUEUE) ||
1710                     folder_has_parent_of_type(dest, F_OUTBOX) ||
1711                     folder_has_parent_of_type(dest, F_DRAFT) ||
1712                     folder_has_parent_of_type(dest, F_TRASH))
1713                         iflags |= IMAP_FLAG_SEEN;
1714
1715                 ok = imap_cmd_append(session, IMAP_FOLDER_ITEM(dest), destdir, real_file, iflags,
1716                                      &new_uid);
1717
1718                 if (ok != MAILIMAP_NO_ERROR) {
1719                         g_warning("can't append message %s\n", real_file);
1720                         g_free(real_file);
1721                         g_free(destdir);
1722                         statusbar_progress_all(0,0,0);
1723                         statusbar_pop_all();
1724                         return -1;
1725                 } else {
1726                         debug_print("appended new message as %d\n", new_uid);
1727                         /* put the local file in the imapcache, so that we don't
1728                          * have to fetch it back later. */
1729
1730                         if (new_uid == 0) {
1731                                 missing_uids = TRUE;
1732                                 debug_print("Missing UID (0)\n");
1733                         }
1734                         if (new_uid > 0) {
1735                                 gchar *cache_path = folder_item_get_path(dest);
1736                                 if (!is_dir_exist(cache_path))
1737                                         make_dir_hier(cache_path);
1738                                 if (is_dir_exist(cache_path)) {
1739                                         gchar *cache_file = g_strconcat(
1740                                                 cache_path, G_DIR_SEPARATOR_S,
1741                                                 itos(new_uid), NULL);
1742                                         copy_file(real_file, cache_file, TRUE);
1743                                         debug_print("got UID %d, copied to cache: %s\n", new_uid, cache_file);
1744                                         g_free(cache_file);
1745                                 }
1746                                 g_free(cache_path);
1747                         }
1748                 }
1749
1750                 if (relation != NULL)
1751                         g_hash_table_insert(relation, fileinfo->msginfo != NULL ?
1752                                           (gpointer) fileinfo->msginfo : (gpointer) fileinfo,
1753                                           GINT_TO_POINTER(new_uid));
1754                 if (last_uid < new_uid) {
1755                         last_uid = new_uid;
1756                 }
1757
1758                 g_free(real_file);
1759         }
1760
1761         statusbar_progress_all(0,0,0);
1762         statusbar_pop_all();
1763
1764
1765         g_free(destdir);
1766
1767         imap_scan_required(folder, dest);
1768
1769         session = imap_session_get(folder);
1770         if (!session) {
1771                 return -1;
1772         }
1773         if (missing_uids) {
1774                 gint a;
1775                 ok = imap_select(session, IMAP_FOLDER(folder), dest,
1776                          &a, NULL, NULL, NULL, NULL, FALSE);
1777         }
1778         return last_uid;
1779 }
1780
1781 static GSList *flatten_mailimap_set(struct mailimap_set * set)
1782 {
1783         GSList *result = NULL;
1784         clistiter *list;
1785         guint32 start, end, t;
1786         GSList *cur;
1787
1788         if (!set || !set->set_list)
1789                 return NULL;
1790
1791         for (list = clist_begin(set->set_list); list; list = clist_next(list)) {
1792                 struct mailimap_set_item *item = (struct mailimap_set_item *)clist_content(list);
1793                 start = item->set_first;
1794                 end = item->set_last;
1795                 if (start <= end) {
1796                         for (t = start; t <= end; t++) {
1797                                 result = g_slist_prepend(result, GINT_TO_POINTER(t));
1798                         }
1799                 }
1800         }
1801         result = g_slist_reverse(result);
1802         if (debug_get_mode()) {
1803                 debug_print("flat imap set: ");
1804                 for (cur = result; cur; cur = cur->next) {
1805                         debug_print("%d ", GPOINTER_TO_INT(cur->data));
1806                 }
1807                 debug_print("\n");
1808         }
1809
1810         return result;
1811 }
1812 static gint imap_do_copy_msgs(Folder *folder, FolderItem *dest,
1813                               MsgInfoList *msglist, GHashTable *relation)
1814 {
1815         FolderItem *src;
1816         gchar *destdir;
1817         GSList *seq_list, *cur;
1818         MsgInfo *msginfo;
1819         IMAPSession *session;
1820         gint ok = MAILIMAP_NO_ERROR;
1821         GHashTable *uid_hash;
1822         gint last_num = 0;
1823
1824         g_return_val_if_fail(folder != NULL, -1);
1825         g_return_val_if_fail(dest != NULL, -1);
1826         g_return_val_if_fail(msglist != NULL, -1);
1827
1828         debug_print("getting session...\n");
1829         session = imap_session_get(folder);
1830
1831         if (!session) {
1832                 return -1;
1833         }
1834
1835         msginfo = (MsgInfo *)msglist->data;
1836         src = msginfo->folder;
1837         if (src == dest) {
1838                 g_warning("the src folder is identical to the dest.\n");
1839                 return -1;
1840         }
1841
1842         if (src->folder != dest->folder) {
1843                 GSList *infolist = NULL, *cur;
1844                 int res = -1;
1845                 for (cur = msglist; cur; cur = cur->next) {
1846                         msginfo = (MsgInfo *)cur->data;
1847                         MsgFileInfo *fileinfo = g_new0(MsgFileInfo, 1);
1848                         fileinfo->file = procmsg_get_message_file(msginfo);
1849                         fileinfo->flags = &(msginfo->flags);
1850                         infolist = g_slist_prepend(infolist, fileinfo);
1851                 }
1852                 infolist = g_slist_reverse(infolist);
1853                 res = folder_item_add_msgs(dest, infolist, FALSE);
1854                 for (cur = infolist; cur; cur = cur->next) {
1855                         MsgFileInfo *info = (MsgFileInfo *)cur->data;
1856                         g_free(info->file);
1857                         g_free(info);
1858                 }
1859                 g_slist_free(infolist);
1860                 return res;
1861         }
1862
1863         lock_session(session); /* unlocked later in the function */
1864
1865         ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
1866                          NULL, NULL, NULL, NULL, NULL, FALSE);
1867         if (ok != MAILIMAP_NO_ERROR) {
1868                 return ok;
1869         }
1870
1871         unlock_session(session);
1872
1873         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
1874
1875         if (is_fatal(ok)) {
1876                 g_free(destdir);
1877                 return ok;
1878         }
1879
1880         seq_list = imap_get_lep_set_from_msglist(IMAP_FOLDER(folder), msglist);
1881         uid_hash = g_hash_table_new(g_direct_hash, g_direct_equal);
1882
1883         statusbar_print_all(_("Copying messages..."));
1884         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
1885                 struct mailimap_set * seq_set;
1886                 struct mailimap_set * source = NULL;
1887                 struct mailimap_set * dest = NULL;
1888                 seq_set = cur->data;
1889
1890                 debug_print("Copying messages from %s to %s ...\n",
1891                             src->path, destdir);
1892
1893                 lock_session(session); /* unlocked later in the function */
1894                 ok = imap_cmd_copy(session, seq_set, destdir,
1895                         &source, &dest);
1896
1897                 if (is_fatal(ok)) {
1898                         session = NULL;
1899                 }
1900
1901                 if (ok == MAILIMAP_NO_ERROR) {
1902                         unlock_session(session);
1903                         if (relation && source && dest) {
1904                                 GSList *s_list = flatten_mailimap_set(source);
1905                                 GSList *d_list = flatten_mailimap_set(dest);
1906                                 GSList *s_cur, *d_cur;
1907                                 if (g_slist_length(s_list) == g_slist_length(d_list)) {
1908
1909                                         for (s_cur = s_list, d_cur = d_list;
1910                                              s_cur && d_cur;
1911                                              s_cur = s_cur->next, d_cur = d_cur->next) {
1912                                                 g_hash_table_insert(uid_hash, s_cur->data, d_cur->data);
1913                                         }
1914
1915                                 } else {
1916                                         debug_print("hhhmm, source list length != dest list length.\n");
1917                                 }
1918                                 g_slist_free(s_list);
1919                                 g_slist_free(d_list);
1920                         }
1921                 }
1922
1923
1924                 if (source)
1925                         mailimap_set_free(source);
1926                 if (dest)
1927                         mailimap_set_free(dest);
1928
1929                 if (ok != MAILIMAP_NO_ERROR) {
1930                         g_hash_table_destroy(uid_hash);
1931                         imap_lep_set_free(seq_list);
1932                         statusbar_pop_all();
1933                         return -1;
1934                 }
1935         }
1936
1937         for (cur = msglist; cur != NULL; cur = g_slist_next(cur)) {
1938                 MsgInfo *msginfo = (MsgInfo *)cur->data;
1939                 gpointer hashval;
1940
1941                 hashval = g_hash_table_lookup(uid_hash, GINT_TO_POINTER(msginfo->msgnum));
1942
1943                 if (hashval != NULL) {
1944                         gint num = GPOINTER_TO_INT(hashval);
1945                         g_hash_table_insert(relation, msginfo,
1946                                           GINT_TO_POINTER(num));
1947                         if (num > last_num)
1948                                 last_num = num;
1949                         debug_print("copied message %d as %d\n", msginfo->msgnum, num);
1950                         /* put the local file in the imapcache, so that we don't
1951                          * have to fetch it back later. */
1952                         if (num > 0) {
1953                                 gchar *cache_path = folder_item_get_path(msginfo->folder);
1954                                 gchar *real_file = g_strconcat(
1955                                         cache_path, G_DIR_SEPARATOR_S,
1956                                         itos(msginfo->msgnum), NULL);
1957                                 gchar *cache_file = NULL;
1958                                 g_free(cache_path);
1959                                 cache_path = folder_item_get_path(dest);
1960                                 cache_file = g_strconcat(
1961                                         cache_path, G_DIR_SEPARATOR_S,
1962                                         itos(num), NULL);
1963                                 if (!is_dir_exist(cache_path))
1964                                         make_dir_hier(cache_path);
1965                                 if (is_file_exist(real_file) && is_dir_exist(cache_path)) {
1966                                         copy_file(real_file, cache_file, TRUE);
1967                                         debug_print("copied to cache: %s\n", cache_file);
1968                                 }
1969                                 g_free(real_file);
1970                                 g_free(cache_file);
1971                                 g_free(cache_path);
1972                         }
1973                 } else
1974                         g_hash_table_insert(relation, msginfo,
1975                                           GINT_TO_POINTER(0));
1976         }
1977         statusbar_pop_all();
1978
1979         g_hash_table_destroy(uid_hash);
1980         imap_lep_set_free(seq_list);
1981
1982         g_free(destdir);
1983
1984         IMAP_FOLDER_ITEM(dest)->lastuid = 0;
1985         IMAP_FOLDER_ITEM(dest)->uid_next = 0;
1986         g_slist_free(IMAP_FOLDER_ITEM(dest)->uid_list);
1987         IMAP_FOLDER_ITEM(dest)->uid_list = NULL;
1988
1989         imap_scan_required(folder, dest);
1990         if (ok == MAILIMAP_NO_ERROR)
1991                 return last_num;
1992         else
1993                 return -1;
1994 }
1995
1996 static gint imap_copy_msg(Folder *folder, FolderItem *dest, MsgInfo *msginfo)
1997 {
1998         GSList msglist;
1999
2000         g_return_val_if_fail(msginfo != NULL, -1);
2001
2002         msglist.data = msginfo;
2003         msglist.next = NULL;
2004
2005         return imap_copy_msgs(folder, dest, &msglist, NULL);
2006 }
2007
2008 static gint imap_copy_msgs(Folder *folder, FolderItem *dest,
2009                     MsgInfoList *msglist, GHashTable *relation)
2010 {
2011         MsgInfo *msginfo;
2012         gint ret;
2013
2014         g_return_val_if_fail(folder != NULL, -1);
2015         g_return_val_if_fail(dest != NULL, -1);
2016         g_return_val_if_fail(msglist != NULL, -1);
2017
2018         msginfo = (MsgInfo *)msglist->data;
2019         g_return_val_if_fail(msginfo->folder != NULL, -1);
2020
2021         ret = imap_do_copy_msgs(folder, dest, msglist, relation);
2022         return ret;
2023 }
2024
2025 static gboolean imap_matcher_type_is_local(gint matchertype)
2026 {
2027         switch (matchertype) {
2028         case MATCHCRITERIA_FROM:
2029         case MATCHCRITERIA_TO:
2030         case MATCHCRITERIA_CC:
2031         case MATCHCRITERIA_TO_OR_CC:
2032         case MATCHCRITERIA_SUBJECT:
2033         case MATCHCRITERIA_REFERENCES:
2034         case MATCHCRITERIA_INREPLYTO:
2035         case MATCHCRITERIA_AGE_GREATER:
2036         case MATCHCRITERIA_AGE_LOWER:
2037         case MATCHCRITERIA_FORWARDED:
2038         case MATCHCRITERIA_SPAM:
2039         case MATCHCRITERIA_UNREAD:
2040         case MATCHCRITERIA_NEW:
2041         case MATCHCRITERIA_MARKED:
2042         case MATCHCRITERIA_REPLIED:
2043         case MATCHCRITERIA_DELETED:
2044         case MATCHCRITERIA_SIZE_GREATER:
2045         case MATCHCRITERIA_SIZE_SMALLER:
2046         case MATCHCRITERIA_SIZE_EQUAL:
2047                 return TRUE;
2048         }
2049         return FALSE;
2050 }
2051
2052 static IMAPSearchKey* search_make_key(MatcherProp* match, gboolean* is_all)
2053 {
2054         if (match->matchtype == MATCHTYPE_MATCHCASE || match->matchtype == MATCHTYPE_MATCH) {
2055                 IMAPSearchKey* result = NULL;
2056                 gboolean invert = FALSE;
2057                 gint matchertype = match->criteria;
2058
2059                 if (is_all) {
2060                         *is_all = FALSE;
2061                 }
2062
2063                 switch (matchertype) {
2064                 case MATCHCRITERIA_NOT_NEW: invert = TRUE; matchertype = MATCHCRITERIA_NEW; break;
2065                 case MATCHCRITERIA_NOT_MARKED: invert = TRUE; matchertype = MATCHCRITERIA_MARKED; break;
2066                 case MATCHCRITERIA_NOT_FORWARDED: invert = TRUE; matchertype = MATCHCRITERIA_FORWARDED; break;
2067                 case MATCHCRITERIA_NOT_SPAM: invert = TRUE; matchertype = MATCHCRITERIA_SPAM; break;
2068                 case MATCHCRITERIA_NOT_SUBJECT: invert = TRUE; matchertype = MATCHCRITERIA_SUBJECT; break;
2069                 case MATCHCRITERIA_NOT_FROM: invert = TRUE; matchertype = MATCHCRITERIA_FROM; break;
2070                 case MATCHCRITERIA_NOT_TO: invert = TRUE; matchertype = MATCHCRITERIA_TO; break;
2071                 case MATCHCRITERIA_NOT_CC: invert = TRUE; matchertype = MATCHCRITERIA_CC; break;
2072                 case MATCHCRITERIA_NOT_REFERENCES: invert = TRUE; matchertype = MATCHCRITERIA_REFERENCES; break;
2073                 case MATCHCRITERIA_NOT_HEADER: invert = TRUE; matchertype = MATCHCRITERIA_HEADER; break;
2074                 case MATCHCRITERIA_NOT_TAG: invert = TRUE; matchertype = MATCHCRITERIA_TAG; break;
2075                 case MATCHCRITERIA_NOT_HEADERS_PART: invert = TRUE; matchertype = MATCHCRITERIA_HEADERS_PART; break;
2076                 case MATCHCRITERIA_NOT_MESSAGE: invert = TRUE; matchertype = MATCHCRITERIA_MESSAGE; break;
2077                 case MATCHCRITERIA_NOT_BODY_PART: invert = TRUE; matchertype = MATCHCRITERIA_BODY_PART; break;
2078                 case MATCHCRITERIA_NOT_TO_AND_NOT_CC: invert = TRUE; matchertype = MATCHCRITERIA_TO_OR_CC; break;
2079                 case MATCHCRITERIA_NOT_INREPLYTO: invert = TRUE; matchertype = MATCHCRITERIA_INREPLYTO; break;
2080                 }
2081
2082                 /*
2083                  * this aborts conversion even for predicates understood by the following code.
2084                  * while that might seem wasteful, claws local search for information listed below
2085                  * has proven faster than IMAP search plus network roundtrips. once this changes,
2086                  * consider removing these exceptions.
2087                  */
2088                 if (imap_matcher_type_is_local(matchertype))
2089                         return NULL;
2090
2091                 /* the Message-ID header is also cached */
2092                 if (matchertype == MATCHCRITERIA_HEADER && g_strcmp0("Message-ID", match->header) == 0) {
2093                         return NULL;
2094                 }
2095
2096                 switch (matchertype) {
2097                 case MATCHCRITERIA_FORWARDED:
2098                         result = imap_search_new(IMAP_SEARCH_CRITERIA_TAG, NULL, RTAG_FORWARDED, 0);
2099                         break;
2100
2101                 case MATCHCRITERIA_SPAM:
2102                         result = imap_search_new(IMAP_SEARCH_CRITERIA_TAG, NULL, RTAG_JUNK, 0);
2103                         break;
2104
2105                 case MATCHCRITERIA_INREPLYTO:
2106                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, "In-Reply-To", match->expr, 0);
2107                         break;
2108
2109                 case MATCHCRITERIA_REFERENCES:
2110                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, "References", match->expr, 0);
2111                         break;
2112
2113                 case MATCHCRITERIA_TO_OR_CC:
2114                         result = imap_search_or(
2115                                         imap_search_new(IMAP_SEARCH_CRITERIA_TO, NULL, match->expr, 0),
2116                                         imap_search_new(IMAP_SEARCH_CRITERIA_CC, NULL, match->expr, 0)
2117                                         );
2118                         break;
2119
2120                 case MATCHCRITERIA_HEADERS_PART:
2121                         result = imap_search_and(
2122                                         imap_search_not(imap_search_new(IMAP_SEARCH_CRITERIA_BODY, NULL, match->expr, 0)),
2123                                         imap_search_new(IMAP_SEARCH_CRITERIA_MESSAGE, NULL, match->expr, 0)
2124                                         );
2125                         break;
2126
2127                 case MATCHCRITERIA_SIZE_EQUAL:
2128                         result = imap_search_and(
2129                                         imap_search_not(imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_SMALLER, NULL, NULL, match->value)),
2130                                         imap_search_not(imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_GREATER, NULL, NULL, match->value))
2131                                         );
2132                         break;
2133
2134                 case MATCHCRITERIA_NOT_UNREAD:
2135                         result = imap_search_new(IMAP_SEARCH_CRITERIA_READ, NULL, NULL, 0);
2136                         break;
2137
2138                 case MATCHCRITERIA_UNREAD:
2139                         result = imap_search_new(IMAP_SEARCH_CRITERIA_UNREAD, NULL, NULL, 0);
2140                         break;
2141
2142                 case MATCHCRITERIA_NEW:
2143                         result = imap_search_new(IMAP_SEARCH_CRITERIA_NEW, NULL, NULL, 0);
2144                         break;
2145
2146                 case MATCHCRITERIA_MARKED:
2147                         result = imap_search_new(IMAP_SEARCH_CRITERIA_MARKED, NULL, NULL, 0);
2148                         break;
2149
2150                 case MATCHCRITERIA_DELETED:
2151                         result = imap_search_new(IMAP_SEARCH_CRITERIA_DELETED, NULL, NULL, 0);
2152                         break;
2153
2154                 case MATCHCRITERIA_REPLIED:
2155                         result = imap_search_new(IMAP_SEARCH_CRITERIA_REPLIED, NULL, NULL, 0);
2156                         break;
2157
2158                 case MATCHCRITERIA_TAG:
2159                         {
2160                                 gchar *tmp = imap_utf8_to_modified_utf7(match->expr, TRUE);
2161                                 result = imap_search_new(IMAP_SEARCH_CRITERIA_TAG, NULL, tmp, 0);
2162                                 g_free(tmp);
2163                         }
2164                         break;
2165
2166                 case MATCHCRITERIA_SUBJECT:
2167                         result = imap_search_new(IMAP_SEARCH_CRITERIA_SUBJECT, NULL, match->expr, 0);
2168                         break;
2169
2170                 case MATCHCRITERIA_FROM:
2171                         result = imap_search_new(IMAP_SEARCH_CRITERIA_FROM, NULL, match->expr, 0);
2172                         break;
2173
2174                 case MATCHCRITERIA_TO:
2175                         result = imap_search_new(IMAP_SEARCH_CRITERIA_TO, NULL, match->expr, 0);
2176                         break;
2177
2178                 case MATCHCRITERIA_CC:
2179                         result = imap_search_new(IMAP_SEARCH_CRITERIA_CC, NULL, match->expr, 0);
2180                         break;
2181
2182                 case MATCHCRITERIA_AGE_GREATER:
2183                         result = imap_search_new(IMAP_SEARCH_CRITERIA_AGE_GREATER, NULL, NULL, match->value);
2184                         break;
2185
2186                 case MATCHCRITERIA_AGE_LOWER:
2187                         result = imap_search_new(IMAP_SEARCH_CRITERIA_AGE_LOWER, NULL, NULL, match->value);
2188                         break;
2189
2190                 case MATCHCRITERIA_BODY_PART:
2191                         result = imap_search_new(IMAP_SEARCH_CRITERIA_BODY, NULL, match->expr, 0);
2192                         break;
2193
2194                 case MATCHCRITERIA_MESSAGE:
2195                         result = imap_search_new(IMAP_SEARCH_CRITERIA_MESSAGE, NULL, match->expr, 0);
2196                         break;
2197
2198                 case MATCHCRITERIA_HEADER:
2199                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, match->header, match->expr, 0);
2200                         break;
2201
2202                 case MATCHCRITERIA_SIZE_GREATER:
2203                         result = imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_GREATER, NULL, NULL, match->value);
2204                         break;
2205
2206                 case MATCHCRITERIA_SIZE_SMALLER:
2207                         result = imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_SMALLER, NULL, NULL, match->value);
2208                         break;
2209
2210                 default:
2211                         result = imap_search_new(IMAP_SEARCH_CRITERIA_ALL, NULL, NULL, 0);
2212                         if (is_all) {
2213                                 *is_all = TRUE;
2214                         }
2215                         break;
2216                 }
2217
2218                 if (invert) {
2219                         result = imap_search_not(result);
2220                         if (is_all && *is_all) {
2221                                 *is_all = FALSE;
2222                         }
2223                 }
2224
2225                 return result;
2226         }
2227
2228         return NULL;
2229 }
2230
2231 static void imap_change_search_charset(IMAPFolder *folder)
2232 {
2233         /* If server supports charset in searches, but the last used one failed,
2234          * changed to the next preferred charset. If none are still available,
2235          * disable charset searches.
2236          * Charsets are tried in the following order:
2237          * UTF-8, locale's charset, UTF-7.
2238          */
2239
2240         if (folder->search_charset_supported) {
2241                 if (folder->search_charset && !strcmp(folder->search_charset, conv_get_locale_charset_str_no_utf8()))
2242                         folder->search_charset = "UTF-8";
2243                 else if (folder->search_charset && !strcmp(folder->search_charset, "UTF-8"))
2244                         folder->search_charset = "UTF-7";
2245                 else {
2246                         folder->search_charset = NULL;
2247                         folder->search_charset_supported = FALSE;
2248                 }
2249         }
2250 }
2251
2252 static MatcherProp *imap_matcher_prop_set_charset(IMAPFolder *folder,
2253                                                   MatcherProp *utf8_prop,
2254                                                   gchar **charset)
2255 {
2256         /* If the match is going to be done locally, or the criteria is on
2257          * tag (special-cased to modified-UTF-7), or the expression searched
2258          * is ASCII, don't bother converting.
2259          */
2260         if (imap_matcher_type_is_local(utf8_prop->criteria)
2261          || utf8_prop->criteria == MATCHCRITERIA_TAG
2262          || utf8_prop->criteria == MATCHCRITERIA_NOT_TAG
2263          || utf8_prop->expr == NULL
2264          || is_ascii_str(utf8_prop->expr))
2265                 return matcherprop_new(utf8_prop->criteria,
2266                                utf8_prop->header,
2267                                utf8_prop->matchtype,
2268                                utf8_prop->expr,
2269                                utf8_prop->value);
2270         else {
2271                 gchar *conv_expr = NULL;
2272
2273                 /* If the search is server-side and the server doesn't support
2274                  * searching with the charsets we handle, bail out.
2275                  */
2276                 if (folder->search_charset_supported == FALSE)
2277                         return NULL;
2278
2279                 /* Else, convert. */
2280                 if (*charset == NULL)
2281                         *charset = g_strdup(folder->search_charset);
2282
2283                 conv_expr = conv_codeset_strdup(utf8_prop->expr, CS_UTF_8, *charset);
2284
2285                 if (conv_expr == NULL)
2286                         conv_expr = g_strdup(utf8_prop->expr);
2287
2288                 return matcherprop_new(utf8_prop->criteria,
2289                                utf8_prop->header,
2290                                utf8_prop->matchtype,
2291                                conv_expr,
2292                                utf8_prop->value);
2293         }
2294 }
2295
2296 static gint     search_msgs             (Folder                 *folder,
2297                                          FolderItem             *container,
2298                                          MsgNumberList          **msgs,
2299                                          gboolean               *on_server,
2300                                          MatcherList            *predicate,
2301                                          SearchProgressNotify   progress_cb,
2302                                          gpointer               progress_data)
2303 {
2304         IMAPSearchKey* key = NULL;
2305         GSList* cur;
2306         int result = -1;
2307         clist* uidlist = NULL;
2308         gboolean server_filtering_useless = FALSE;
2309         IMAPSession *session;
2310         gchar *charset_to_use = NULL;
2311
2312         if (on_server == NULL || !*on_server) {
2313                 return folder_item_search_msgs_local(folder, container, msgs, on_server,
2314                                 predicate, progress_cb, progress_data);
2315         }
2316
2317         for (cur = predicate->matchers; cur != NULL; cur = cur->next) {
2318                 IMAPSearchKey* matcherPart = NULL;
2319                 MatcherProp* prop = (MatcherProp*) cur->data;
2320                 gboolean is_all;
2321                 MatcherProp *imap_prop = imap_matcher_prop_set_charset(IMAP_FOLDER(folder), prop, &charset_to_use);
2322
2323                 if (imap_prop == NULL) {
2324                         /* Couldn't convert matcherprop to IMAP - probably not ascii
2325                          * and server doesn't support the charsets we do. */
2326                          return -1;
2327                 }
2328
2329                 matcherPart = search_make_key(imap_prop, &is_all);
2330
2331                 matcherprop_free(imap_prop);
2332
2333                 if (on_server) {
2334                         *on_server &= matcherPart != NULL && prop->matchtype == MATCHTYPE_MATCHCASE;
2335                 }
2336
2337                 if (matcherPart) {
2338                         if (key == NULL) {
2339                                 key = matcherPart;
2340                                 server_filtering_useless = is_all;
2341                         } else if (predicate->bool_and) {
2342                                 key = imap_search_and(key, matcherPart);
2343                                 server_filtering_useless &= is_all;
2344                         } else {
2345                                 key = imap_search_or(key, matcherPart);
2346                                 server_filtering_useless |= is_all;
2347                         }
2348                 }
2349         }
2350
2351         if (server_filtering_useless) {
2352                 imap_search_free(key);
2353                 key = NULL;
2354         }
2355
2356         if (key == NULL && progress_cb != NULL) {
2357                 GSList* cur;
2358                 GSList* list;
2359                 int count = 0;
2360
2361                 progress_cb(progress_data, TRUE, 0, 0, container->total_msgs);
2362                 progress_cb(progress_data, TRUE, container->total_msgs, 0, container->total_msgs);
2363
2364                 list = folder_item_get_msg_list(container);
2365                 for (cur = list; cur != NULL; cur = cur->next) {
2366                         *msgs = g_slist_prepend(*msgs, GUINT_TO_POINTER(((MsgInfo*) cur->data)->msgnum));
2367                         count++;
2368                 }
2369                 procmsg_msg_list_free(list);
2370
2371                 *msgs = g_slist_reverse(*msgs);
2372
2373                 return count;
2374         }
2375
2376         session = imap_session_get(folder);
2377         if (!session) {
2378                 return -1;
2379         }
2380         result = imap_select(session, IMAP_FOLDER(folder), FOLDER_ITEM(container),
2381                          NULL, NULL, NULL, NULL, NULL, TRUE);
2382         if (result != MAILIMAP_NO_ERROR)
2383                 return -1;
2384
2385         if (progress_cb)
2386                 progress_cb(progress_data, TRUE, 0, 0, container->total_msgs);
2387         result = imap_threaded_search(folder, IMAP_SEARCH_TYPE_KEYED, key, charset_to_use, NULL, &uidlist);
2388         if (progress_cb)
2389                 progress_cb(progress_data, TRUE, container->total_msgs, 0, container->total_msgs);
2390
2391         if (result == MAILIMAP_NO_ERROR) {
2392                 gint result = 0;
2393
2394                 *msgs = imap_uid_list_from_lep(uidlist, &result);
2395
2396                 mailimap_search_result_free(uidlist);
2397
2398                 if (charset_to_use != NULL)
2399                         g_free(charset_to_use);
2400
2401                 return result;
2402         } else if (charset_to_use != NULL) {
2403                 /* If search failed and was on an 8-bit string, try the next
2404                  * available charset to search if there still are some.
2405                  */
2406                 g_free(charset_to_use);
2407
2408                 imap_change_search_charset(IMAP_FOLDER(folder));
2409                 if (IMAP_FOLDER(folder)->search_charset_supported)
2410                         return search_msgs(folder, container, msgs, on_server, predicate,
2411                                    progress_cb, progress_data);
2412                 else
2413                         return -1;
2414         } else {
2415                 return -1;
2416         }
2417 }
2418
2419
2420 static gint imap_do_remove_msgs(Folder *folder, FolderItem *dest,
2421                                 MsgInfoList *msglist, GHashTable *relation)
2422 {
2423         gchar *destdir, *dir;
2424         GSList *numlist = NULL, *cur;
2425         MsgInfo *msginfo;
2426         IMAPSession *session;
2427         gint ok = MAILIMAP_NO_ERROR;
2428
2429         g_return_val_if_fail(folder != NULL, -1);
2430         g_return_val_if_fail(dest != NULL, -1);
2431         g_return_val_if_fail(msglist != NULL, -1);
2432
2433         debug_print("getting session...\n");
2434         session = imap_session_get(folder);
2435         if (!session) {
2436                 return -1;
2437         }
2438
2439         lock_session(session); /* unlocked later in the function */
2440
2441         msginfo = (MsgInfo *)msglist->data;
2442
2443         ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
2444                          NULL, NULL, NULL, NULL, NULL, FALSE);
2445         if (ok != MAILIMAP_NO_ERROR) {
2446                 return ok;
2447         }
2448
2449         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
2450         if (is_fatal(ok)) {
2451                 g_free(destdir);
2452                 return ok;
2453         }
2454         for (cur = msglist; cur; cur = cur->next) {
2455                 msginfo = (MsgInfo *)cur->data;
2456                 if (!MSG_IS_DELETED(msginfo->flags))
2457                         numlist = g_slist_prepend(numlist, GINT_TO_POINTER(msginfo->msgnum));
2458         }
2459         numlist = g_slist_reverse(numlist);
2460
2461         if (numlist != NULL) {
2462                 ok = imap_set_message_flags
2463                         (session, IMAP_FOLDER_ITEM(msginfo->folder), numlist, IMAP_FLAG_DELETED, NULL, TRUE);
2464                 if (ok != MAILIMAP_NO_ERROR) {
2465                         log_warning(LOG_PROTOCOL, _("can't set deleted flags\n"));
2466                         g_free(destdir);
2467                         return ok;
2468                 }
2469         } /* else we just need to expunge */
2470         ok = imap_cmd_expunge(session, folder->account->imap_use_trash);
2471         if (ok != MAILIMAP_NO_ERROR) {
2472                 log_warning(LOG_PROTOCOL, _("can't expunge\n"));
2473                 g_free(destdir);
2474                 return ok;
2475         }
2476
2477         session->folder_content_changed = TRUE;
2478         unlock_session(session);
2479
2480         dir = folder_item_get_path(msginfo->folder);
2481         if (is_dir_exist(dir)) {
2482                 for (cur = msglist; cur; cur = cur->next) {
2483                         msginfo = (MsgInfo *)cur->data;
2484                         remove_numbered_files(dir, msginfo->msgnum, msginfo->msgnum);
2485                 }
2486         }
2487         g_free(dir);
2488
2489         g_slist_free(numlist);
2490
2491         imap_scan_required(folder, dest);
2492
2493         g_free(destdir);
2494
2495         return 0;
2496 }
2497
2498 static gint imap_remove_msgs(Folder *folder, FolderItem *dest,
2499                     MsgInfoList *msglist, GHashTable *relation)
2500 {
2501         MsgInfo *msginfo;
2502
2503         g_return_val_if_fail(folder != NULL, -1);
2504         g_return_val_if_fail(dest != NULL, -1);
2505         if (msglist == NULL)
2506                 return 0;
2507
2508         msginfo = (MsgInfo *)msglist->data;
2509         g_return_val_if_fail(msginfo->folder != NULL, -1);
2510
2511         return imap_do_remove_msgs(folder, dest, msglist, relation);
2512 }
2513
2514 static gint imap_remove_all_msg(Folder *folder, FolderItem *item)
2515 {
2516         GSList *list = folder_item_get_msg_list(item);
2517         gint res = imap_remove_msgs(folder, item, list, NULL);
2518         procmsg_msg_list_free(list);
2519         return res;
2520 }
2521
2522 static gboolean imap_is_msg_changed(Folder *folder, FolderItem *item,
2523                                     MsgInfo *msginfo)
2524 {
2525         /* TODO: properly implement this method */
2526         return FALSE;
2527 }
2528
2529 static gint imap_close(Folder *folder, FolderItem *item)
2530 {
2531         return 0;
2532 }
2533
2534 static gint imap_scan_tree_real(Folder *folder, gboolean subs_only)
2535 {
2536         FolderItem *item = NULL;
2537         IMAPSession *session;
2538         gchar *root_folder = NULL;
2539
2540         g_return_val_if_fail(folder != NULL, -1);
2541         g_return_val_if_fail(folder->account != NULL, -1);
2542
2543         debug_print("getting session...\n");
2544         session = imap_session_get(folder);
2545         if (!session) {
2546                 if (!folder->node) {
2547                         folder_tree_destroy(folder);
2548                         item = folder_item_new(folder, folder->name, NULL);
2549                         item->folder = folder;
2550                         folder->node = item->node = g_node_new(item);
2551                 }
2552                 return -1;
2553         }
2554
2555         if (folder->account->imap_dir && *folder->account->imap_dir) {
2556                 gchar *real_path;
2557                 int r = MAILIMAP_NO_ERROR;
2558                 clist * lep_list;
2559
2560                 Xstrdup_a(root_folder, folder->account->imap_dir, {return -1;});
2561                 extract_quote(root_folder, '"');
2562                 subst_char(root_folder,
2563                            imap_get_path_separator(session, IMAP_FOLDER(folder),
2564                                                    root_folder, &r),
2565                            '/');
2566                 if (is_fatal(r))
2567                         return -1;
2568                 strtailchomp(root_folder, '/');
2569                 real_path = imap_get_real_path
2570                         (session, IMAP_FOLDER(folder), root_folder, &r);
2571                 if (is_fatal(r)) {
2572                         g_free(real_path);
2573                         return -1;
2574                 }
2575                 debug_print("IMAP root directory: %s\n", real_path);
2576
2577                 /* check if root directory exist */
2578
2579                 r = imap_threaded_list(session->folder, "", real_path,
2580                                        &lep_list);
2581
2582                 if (r != MAILIMAP_NO_ERROR)
2583                         imap_handle_error(SESSION(session), NULL, r);
2584
2585                 if ((r != MAILIMAP_NO_ERROR) || (clist_count(lep_list) == 0)) {
2586                         if (!folder->node) {
2587                                 item = folder_item_new(folder, folder->name, NULL);
2588                                 item->folder = folder;
2589                                 folder->node = item->node = g_node_new(item);
2590                         }
2591                         return -1;
2592                 }
2593                 mailimap_list_result_free(lep_list);
2594
2595                 g_free(real_path);
2596         }
2597
2598         if (folder->node)
2599                 item = FOLDER_ITEM(folder->node->data);
2600
2601         if (item && !item->path && root_folder) {
2602                 item->path = g_strdup(root_folder);
2603         }
2604
2605         if (!item || ((item->path || root_folder) &&
2606                       strcmp2(item->path, root_folder) != 0)) {
2607                 folder_tree_destroy(folder);
2608                 item = folder_item_new(folder, folder->name, root_folder);
2609                 item->folder = folder;
2610                 folder->node = item->node = g_node_new(item);
2611         }
2612
2613         imap_scan_tree_recursive(session, FOLDER_ITEM(folder->node->data), subs_only);
2614         imap_create_missing_folders(folder);
2615
2616         return 0;
2617 }
2618
2619 static gint imap_scan_tree(Folder *folder)
2620 {
2621         gboolean subs_only = FALSE;
2622         if (folder->account) {
2623                 debug_print(" scanning only subs %d\n", folder->account->imap_subsonly);
2624                 subs_only = folder->account->imap_subsonly;
2625         }
2626         return imap_scan_tree_real(folder, subs_only);
2627 }
2628
2629 static gint imap_scan_tree_recursive(IMAPSession *session, FolderItem *item, gboolean subs_only)
2630 {
2631         Folder *folder;
2632         IMAPFolder *imapfolder;
2633         FolderItem *new_item;
2634         GSList *item_list, *cur;
2635         GNode *node;
2636         gchar *real_path;
2637         gchar *wildcard_path;
2638         gchar separator;
2639         gchar wildcard[3];
2640         clist * lep_list;
2641         int r = MAILIMAP_NO_ERROR;
2642
2643         g_return_val_if_fail(item != NULL, -1);
2644         g_return_val_if_fail(item->folder != NULL, -1);
2645         g_return_val_if_fail(item->no_sub == FALSE, -1);
2646
2647         folder = item->folder;
2648         imapfolder = IMAP_FOLDER(folder);
2649
2650         separator = imap_get_path_separator(session, imapfolder, item->path, &r);
2651         if (is_fatal(r))
2652                 return r;
2653
2654         if (folder->ui_func)
2655                 folder->ui_func(folder, item, folder->ui_func_data);
2656
2657         if (item->path) {
2658                 wildcard[0] = separator;
2659                 wildcard[1] = '%';
2660                 wildcard[2] = '\0';
2661                 real_path = imap_get_real_path(session, imapfolder, item->path, &r);
2662                 if (is_fatal(r)) {
2663                         g_free(real_path);
2664                         return r;
2665                 }
2666         } else {
2667                 wildcard[0] = '%';
2668                 wildcard[1] = '\0';
2669                 real_path = g_strdup("");
2670         }
2671
2672         Xstrcat_a(wildcard_path, real_path, wildcard,
2673                   {g_free(real_path); return MAILIMAP_ERROR_BAD_STATE;});
2674         lep_list = NULL;
2675
2676         if (subs_only)
2677                 r = imap_threaded_lsub(folder, "", wildcard_path, &lep_list);
2678         else
2679                 r = imap_threaded_list(folder, "", wildcard_path, &lep_list);
2680
2681         if (r != MAILIMAP_NO_ERROR) {
2682                 imap_handle_error(SESSION(session), NULL, r);
2683                 item_list = NULL;
2684                 g_free(real_path);
2685                 return r;
2686         }
2687         else {
2688                 item_list = imap_list_from_lep(imapfolder,
2689                                                lep_list, real_path, FALSE);
2690                 mailimap_list_result_free(lep_list);
2691         }
2692
2693         g_free(real_path);
2694
2695         node = item->node->children;
2696         while (node != NULL) {
2697                 FolderItem *old_item = FOLDER_ITEM(node->data);
2698                 GNode *next = node->next;
2699
2700                 new_item = NULL;
2701                 for (cur = item_list; cur != NULL; cur = cur->next) {
2702                         FolderItem *cur_item = FOLDER_ITEM(cur->data);
2703                         if (!strcmp2(old_item->path, cur_item->path)) {
2704                                 new_item = cur_item;
2705                                 break;
2706                         }
2707                 }
2708                 if (!new_item) {
2709                         if (old_item && old_item->path && !strcmp(old_item->path, "INBOX")) {
2710                                 debug_print("not removing INBOX\n");
2711                         } else {
2712                                 debug_print("folder '%s' not found. removing...\n",
2713                                             old_item->path);
2714                                 folder_item_remove(old_item);
2715                         }
2716                 } else {
2717                         old_item->no_sub = new_item->no_sub;
2718                         old_item->no_select = new_item->no_select;
2719                         if (old_item->no_sub == TRUE && node->children) {
2720                                 debug_print("folder '%s' doesn't have "
2721                                             "subfolders. removing...\n",
2722                                             old_item->path);
2723                                 folder_item_remove_children(old_item);
2724                         }
2725                 }
2726
2727                 node = next;
2728         }
2729
2730         for (cur = item_list; cur != NULL; cur = cur->next) {
2731                 FolderItem *cur_item = FOLDER_ITEM(cur->data);
2732                 new_item = NULL;
2733
2734                 for (node = item->node->children; node != NULL;
2735                      node = node->next) {
2736                         if (!strcmp2(FOLDER_ITEM(node->data)->path,
2737                                      cur_item->path)) {
2738                                 new_item = FOLDER_ITEM(node->data);
2739                                 folder_item_destroy(cur_item);
2740                                 cur_item = NULL;
2741                                 break;
2742                         }
2743                 }
2744                 if (!new_item) {
2745                         new_item = cur_item;
2746                         debug_print("new folder '%s' found.\n", new_item->path);
2747                         folder_item_append(item, new_item);
2748                 }
2749
2750                 if (!strcmp(new_item->path, "INBOX")) {
2751                         new_item->stype = F_INBOX;
2752                         folder->inbox = new_item;
2753                 } else if (!folder_item_parent(item) || item->stype == F_INBOX) {
2754                         gchar *base;
2755
2756                         base = g_path_get_basename(new_item->path);
2757
2758                         if (!folder->outbox && !g_ascii_strcasecmp(base, "Sent")) {
2759                                 new_item->stype = F_OUTBOX;
2760                                 folder->outbox = new_item;
2761                         } else if (!folder->draft && !g_ascii_strcasecmp(base, "Drafts")) {
2762                                 new_item->stype = F_DRAFT;
2763                                 folder->draft = new_item;
2764                         } else if (!folder->queue && !g_ascii_strcasecmp(base, "Queue")) {
2765                                 new_item->stype = F_QUEUE;
2766                                 folder->queue = new_item;
2767                         } else if (!folder->trash && !g_ascii_strcasecmp(base, "Trash")) {
2768                                 new_item->stype = F_TRASH;
2769                                 folder->trash = new_item;
2770                         }
2771                         g_free(base);
2772                 }
2773
2774                 if (new_item->no_sub == FALSE)
2775                         imap_scan_tree_recursive(session, new_item, subs_only);
2776         }
2777
2778         g_slist_free(item_list);
2779
2780         return MAILIMAP_NO_ERROR;
2781 }
2782
2783 GList *imap_scan_subtree(Folder *folder, FolderItem *item, gboolean unsubs_only, gboolean recursive)
2784 {
2785         IMAPSession *session = imap_session_get(folder);
2786         gchar *real_path;
2787         gchar *wildcard_path;
2788         gchar separator;
2789         gchar wildcard[3];
2790         clist * lep_list;
2791         GSList *item_list = NULL, *cur;
2792         GList *child_list = NULL, *tmplist = NULL;
2793         GSList *sub_list = NULL;
2794         int r = MAILIMAP_NO_ERROR;
2795
2796         if (!session)
2797                 return NULL;
2798
2799         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &r);
2800         if (is_fatal(r))
2801                 return NULL;
2802
2803         if (item->path) {
2804                 wildcard[0] = separator;
2805                 wildcard[1] = '%';
2806                 wildcard[2] = '\0';
2807                 real_path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &r);
2808                 if (is_fatal(r)) {
2809                         g_free(real_path);
2810                         return NULL;
2811                 }
2812         } else {
2813                 wildcard[0] = '%';
2814                 wildcard[1] = '\0';
2815                 real_path = g_strdup("");
2816         }
2817
2818         Xstrcat_a(wildcard_path, real_path, wildcard,
2819                   {g_free(real_path); return NULL;});
2820         lep_list = NULL;
2821
2822         if (unsubs_only)
2823                 statusbar_print_all(_("Looking for unsubscribed folders in %s..."),
2824                                 item->path?item->path:item->name);
2825         else
2826                 statusbar_print_all(_("Looking for subfolders of %s..."),
2827                                 item->path?item->path:item->name);
2828
2829         r = imap_threaded_list(folder, "", wildcard_path, &lep_list);
2830         if (r) {
2831                 g_free(real_path);
2832                 statusbar_pop_all();
2833                 return NULL;
2834         }
2835         item_list = imap_list_from_lep(IMAP_FOLDER(folder),
2836                                lep_list, real_path, FALSE);
2837         mailimap_list_result_free(lep_list);
2838
2839         for (cur = item_list; cur != NULL; cur = cur->next) {
2840                 FolderItem *cur_item = FOLDER_ITEM(cur->data);
2841                 if (recursive) {
2842                         tmplist = imap_scan_subtree(folder, cur_item,
2843                                         unsubs_only, recursive);
2844                         if (tmplist)
2845                                 child_list = g_list_concat(child_list, tmplist);
2846                 }
2847                 child_list = g_list_prepend(child_list,
2848                                 imap_get_real_path(session,
2849                                         IMAP_FOLDER(folder), cur_item->path, &r));
2850                 if (is_fatal(r)) {
2851                         g_free(real_path);
2852                         statusbar_pop_all();
2853                         return NULL;
2854                 }
2855                 folder_item_destroy(cur_item);
2856         }
2857         child_list = g_list_reverse(child_list);
2858         g_slist_free(item_list);
2859
2860         if (unsubs_only) {
2861                 r = imap_threaded_lsub(folder, "", wildcard_path, &lep_list);
2862                 if (r) {
2863                         g_free(real_path);
2864                         statusbar_pop_all();
2865                         return NULL;
2866                 }
2867                 sub_list = imap_list_from_lep(IMAP_FOLDER(folder),
2868                                        lep_list, real_path, FALSE);
2869                 mailimap_list_result_free(lep_list);
2870
2871                 for (cur = sub_list; cur != NULL; cur = cur->next) {
2872                         FolderItem *cur_item = FOLDER_ITEM(cur->data);
2873                         GList *oldlitem = NULL;
2874                         gchar *tmp = imap_get_real_path(session,
2875                                         IMAP_FOLDER(folder), cur_item->path, &r);
2876                         if (r) {
2877                                 g_free(real_path);
2878                                 statusbar_pop_all();
2879                                 g_free(tmp);
2880                                 return NULL;
2881                         }
2882                         folder_item_destroy(cur_item);
2883                         oldlitem = g_list_find_custom(
2884                                         child_list, tmp, (GCompareFunc)strcmp2);
2885                         if (oldlitem) {
2886                                 child_list = g_list_remove_link(child_list, oldlitem);
2887                                 g_free(oldlitem->data);
2888                                 g_list_free(oldlitem);
2889                         }
2890                         g_free(tmp);
2891                 }
2892         }
2893
2894         g_free(real_path);
2895         statusbar_pop_all();
2896
2897         return child_list;
2898 }
2899
2900 static gint imap_create_tree(Folder *folder)
2901 {
2902         g_return_val_if_fail(folder != NULL, -1);
2903         g_return_val_if_fail(folder->node != NULL, -1);
2904         g_return_val_if_fail(folder->node->data != NULL, -1);
2905         g_return_val_if_fail(folder->account != NULL, -1);
2906
2907         imap_scan_tree(folder);
2908         imap_create_missing_folders(folder);
2909
2910         return 0;
2911 }
2912
2913 static void imap_create_missing_folders(Folder *folder)
2914 {
2915         g_return_if_fail(folder != NULL);
2916
2917         if (!folder->inbox)
2918                 folder->inbox = imap_create_special_folder
2919                         (folder, F_INBOX, "INBOX");
2920         if (!folder->trash)
2921                 folder->trash = imap_create_special_folder
2922                         (folder, F_TRASH, "Trash");
2923         if (!folder->queue)
2924                 folder->queue = imap_create_special_folder
2925                         (folder, F_QUEUE, "Queue");
2926         if (!folder->outbox)
2927                 folder->outbox = imap_create_special_folder
2928                         (folder, F_OUTBOX, "Sent");
2929         if (!folder->draft)
2930                 folder->draft = imap_create_special_folder
2931                         (folder, F_DRAFT, "Drafts");
2932 }
2933
2934 static FolderItem *imap_create_special_folder(Folder *folder,
2935                                               SpecialFolderItemType stype,
2936                                               const gchar *name)
2937 {
2938         FolderItem *item;
2939         FolderItem *new_item;
2940
2941         g_return_val_if_fail(folder != NULL, NULL);
2942         g_return_val_if_fail(folder->node != NULL, NULL);
2943         g_return_val_if_fail(folder->node->data != NULL, NULL);
2944         g_return_val_if_fail(folder->account != NULL, NULL);
2945         g_return_val_if_fail(name != NULL, NULL);
2946
2947         item = FOLDER_ITEM(folder->node->data);
2948         new_item = imap_create_folder(folder, item, name);
2949
2950         if (!new_item) {
2951                 g_warning("Can't create '%s'\n", name);
2952                 if (!folder->inbox) return NULL;
2953
2954                 new_item = imap_create_folder(folder, folder->inbox, name);
2955                 if (!new_item)
2956                         g_warning("Can't create '%s' under INBOX\n", name);
2957                 else
2958                         new_item->stype = stype;
2959         } else
2960                 new_item->stype = stype;
2961
2962         return new_item;
2963 }
2964
2965 static gchar *imap_folder_get_path(Folder *folder)
2966 {
2967         gchar *folder_path;
2968
2969         g_return_val_if_fail(folder != NULL, NULL);
2970         g_return_val_if_fail(folder->account != NULL, NULL);
2971
2972         folder_path = g_strconcat(get_imap_cache_dir(),
2973                                   G_DIR_SEPARATOR_S,
2974                                   folder->account->recv_server,
2975                                   G_DIR_SEPARATOR_S,
2976                                   folder->account->userid,
2977                                   NULL);
2978
2979         return folder_path;
2980 }
2981
2982 #ifdef G_OS_WIN32
2983 static gchar *imap_encode_unsafe_chars(const gchar *str)
2984 {
2985         gchar *ret = NULL, *o_ret;
2986         gchar *i;
2987         if (!str)
2988                 return NULL;
2989         ret = g_malloc(3*strlen(str)+1);
2990         o_ret = ret;
2991         for (i = str; *i; i++) {
2992                 switch(*i) {
2993                         case ':':
2994                         case '|':
2995                         case '<':
2996                         case '>':
2997                         case '*':
2998                         case '?':
2999                         case '#':
3000                                 *ret++ = '%';
3001                                 *ret++ = '0'+(*i/10);
3002                                 *ret++ = '0'+(*i%10);
3003                                 break;
3004                         default:
3005                                 *ret++ = *i;
3006                 }
3007         }
3008         *ret++ = '\0';
3009         return o_ret;
3010 }
3011 #endif
3012 static gchar *imap_item_get_path(Folder *folder, FolderItem *item)
3013 {
3014         gchar *folder_path, *path;
3015         gchar *item_path = NULL;
3016
3017         g_return_val_if_fail(folder != NULL, NULL);
3018         g_return_val_if_fail(item != NULL, NULL);
3019         folder_path = imap_folder_get_path(folder);
3020
3021         g_return_val_if_fail(folder_path != NULL, NULL);
3022
3023 #ifdef G_OS_UNIX
3024         item_path = g_strdup(item->path);
3025 #else
3026         item_path = imap_encode_unsafe_chars(item->path);
3027 #endif
3028
3029         if (g_path_is_absolute(folder_path)) {
3030                 if (item_path)
3031                         path = g_strconcat(folder_path, G_DIR_SEPARATOR_S,
3032                                            item_path, NULL);
3033                 else
3034                         path = g_strdup(folder_path);
3035         } else {
3036                 if (item_path)
3037                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
3038                                            folder_path, G_DIR_SEPARATOR_S,
3039                                            item_path, NULL);
3040                 else
3041                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
3042                                            folder_path, NULL);
3043         }
3044         g_free(folder_path);
3045         g_free(item_path);
3046 #ifdef G_OS_WIN32
3047         while (strchr(path, '/'))
3048                 *strchr(path, '/') = '\\';
3049 #endif
3050
3051         return path;
3052 }
3053
3054 static FolderItem *imap_create_folder(Folder *folder, FolderItem *parent,
3055                                const gchar *name)
3056 {
3057         gchar *dirpath, *imap_path;
3058         IMAPSession *session;
3059         FolderItem *new_item;
3060         gchar separator;
3061         gchar *new_name;
3062         const gchar *p;
3063         gint ok = MAILIMAP_NO_ERROR;
3064         gboolean no_select = FALSE, no_sub = FALSE;
3065         gboolean exist = FALSE;
3066
3067         g_return_val_if_fail(folder != NULL, NULL);
3068         g_return_val_if_fail(folder->account != NULL, NULL);
3069         g_return_val_if_fail(parent != NULL, NULL);
3070         g_return_val_if_fail(name != NULL, NULL);
3071
3072         debug_print("getting session...\n");
3073         session = imap_session_get(folder);
3074         if (!session) {
3075                 return NULL;
3076         }
3077
3078         if (!folder_item_parent(parent) && strcmp(name, "INBOX") == 0) {
3079                 dirpath = g_strdup(name);
3080         }else if (parent->path)
3081                 dirpath = g_strconcat(parent->path, "/", name, NULL);
3082         else if ((p = strchr(name, '/')) != NULL && *(p + 1) != '\0')
3083                 dirpath = g_strdup(name);
3084         else if (folder->account->imap_dir && *folder->account->imap_dir) {
3085                 gchar *imap_dir;
3086
3087                 Xstrdup_a(imap_dir, folder->account->imap_dir, {return NULL;});
3088                 strtailchomp(imap_dir, '/');
3089                 dirpath = g_strconcat(imap_dir, "/", name, NULL);
3090         } else
3091                 dirpath = g_strdup(name);
3092
3093
3094
3095         /* keep trailing directory separator to create a folder that contains
3096            sub folder */
3097         imap_path = imap_utf8_to_modified_utf7(dirpath, FALSE);
3098
3099         strtailchomp(dirpath, '/');
3100         Xstrdup_a(new_name, name, {
3101                 g_free(dirpath);
3102                 g_free(imap_path);
3103                 return NULL;});
3104
3105         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), imap_path, &ok);
3106         if (is_fatal(ok)) {
3107                 g_free(imap_path);
3108                 return NULL;
3109         }
3110         imap_path_separator_subst(imap_path, separator);
3111         /* remove trailing / for display */
3112         strtailchomp(new_name, '/');
3113
3114         if (strcmp(dirpath, "INBOX") != 0) {
3115                 GPtrArray *argbuf;
3116                 int r;
3117                 clist * lep_list;
3118
3119                 argbuf = g_ptr_array_new();
3120                 r = imap_threaded_list(folder, "", imap_path, &lep_list);
3121                 if (r != MAILIMAP_NO_ERROR) {
3122                         imap_handle_error(SESSION(session), NULL, r);
3123                         log_warning(LOG_PROTOCOL, _("can't create mailbox: LIST failed\n"));
3124                         g_free(imap_path);
3125                         g_free(dirpath);
3126                         ptr_array_free_strings(argbuf);
3127                         g_ptr_array_free(argbuf, TRUE);
3128                         return NULL;
3129                 }
3130
3131                 if (clist_count(lep_list) > 0)
3132                         exist = TRUE;
3133                 mailimap_list_result_free(lep_list);
3134                 lep_list = NULL;
3135                 if (!exist) {
3136                         ok = imap_cmd_create(session, imap_path);
3137                         if (ok != MAILIMAP_NO_ERROR) {
3138                                 log_warning(LOG_PROTOCOL, _("can't create mailbox\n"));
3139                                 g_free(imap_path);
3140                                 g_free(dirpath);
3141                                 return NULL;
3142                         }
3143                         r = imap_threaded_list(folder, "", imap_path, &lep_list);
3144                         if (r == MAILIMAP_NO_ERROR) {
3145                                 GSList *item_list = imap_list_from_lep(IMAP_FOLDER(folder),
3146                                                lep_list, dirpath, TRUE);
3147                                 if (item_list) {
3148                                         FolderItem *cur_item = FOLDER_ITEM(item_list->data);
3149                                         no_select = cur_item->no_select;
3150                                         no_sub = cur_item->no_sub;
3151                                         g_slist_free(item_list);
3152                                 }
3153                                 mailimap_list_result_free(lep_list);
3154                         } else {
3155                                 imap_handle_error(SESSION(session), NULL, r);
3156                         }
3157                 }
3158                 imap_threaded_subscribe(folder, imap_path, TRUE);
3159         } else {
3160                 clist *lep_list;
3161                 int r;
3162                 /* just get flags */
3163                 r = imap_threaded_list(folder, "", "INBOX", &lep_list);
3164                 if (r == MAILIMAP_NO_ERROR) {
3165                         GSList *item_list = imap_list_from_lep(IMAP_FOLDER(folder),
3166                                        lep_list, dirpath, TRUE);
3167                         if (item_list) {
3168                                 FolderItem *cur_item = FOLDER_ITEM(item_list->data);
3169                                 no_select = cur_item->no_select;
3170                                 no_sub = cur_item->no_sub;
3171                                 g_slist_free(item_list);
3172                         }
3173                         mailimap_list_result_free(lep_list);
3174                 } else {
3175                         imap_handle_error(SESSION(session), NULL, r);
3176                 }
3177         }
3178
3179         new_item = folder_item_new(folder, new_name, dirpath);
3180         new_item->no_select = no_select;
3181         new_item->no_sub = no_sub;
3182         folder_item_append(parent, new_item);
3183         g_free(imap_path);
3184         g_free(dirpath);
3185
3186         dirpath = folder_item_get_path(new_item);
3187         if (!is_dir_exist(dirpath))
3188                 make_dir_hier(dirpath);
3189         g_free(dirpath);
3190
3191         if (exist) {
3192                 /* folder existed, scan it */
3193                 imap_scan_required(folder, new_item);
3194                 folder_item_scan_full(new_item, FALSE);
3195         }
3196
3197         return new_item;
3198 }
3199
3200 static gint imap_rename_folder(Folder *folder, FolderItem *item,
3201                                const gchar *name)
3202 {
3203         gchar *dirpath;
3204         gchar *newpath;
3205         gchar *real_oldpath;
3206         gchar *real_newpath;
3207         gchar *paths[2];
3208         gchar *old_cache_dir;
3209         gchar *new_cache_dir;
3210         IMAPSession *session;
3211         gchar separator;
3212         gint ok = MAILIMAP_NO_ERROR;
3213         gint exists, recent, unseen;
3214         guint32 uid_validity;
3215
3216         g_return_val_if_fail(folder != NULL, -1);
3217         g_return_val_if_fail(item != NULL, -1);
3218         g_return_val_if_fail(item->path != NULL, -1);
3219         g_return_val_if_fail(name != NULL, -1);
3220
3221         debug_print("getting session...\n");
3222         session = imap_session_get(folder);
3223         if (!session) {
3224                 return -1;
3225         }
3226
3227         if (strchr(name, imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &ok)) != NULL ||
3228                 is_fatal(ok)) {
3229                 g_warning(_("New folder name must not contain the namespace "
3230                             "path separator"));
3231                 return -1;
3232         }
3233
3234         real_oldpath = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &ok);
3235         if (is_fatal(ok)) {
3236                 g_free(real_oldpath);
3237                 return -1;
3238         }
3239
3240         g_free(session->mbox);
3241         session->mbox = NULL;
3242         session->exists = 0;
3243         session->recent = 0;
3244         session->expunge = 0;
3245         ok = imap_cmd_examine(session, "INBOX",
3246                               &exists, &recent, &unseen, &uid_validity, FALSE);
3247         if (ok != MAILIMAP_NO_ERROR) {
3248                 g_free(real_oldpath);
3249                 return -1;
3250         }
3251
3252         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &ok);
3253         if (is_fatal(ok)) {
3254                 g_free(real_oldpath);
3255                 return -1;
3256         }
3257         if (strchr(item->path, G_DIR_SEPARATOR)) {
3258                 dirpath = g_path_get_dirname(item->path);
3259                 newpath = g_strconcat(dirpath, G_DIR_SEPARATOR_S, name, NULL);
3260                 g_free(dirpath);
3261         } else
3262                 newpath = g_strdup(name);
3263
3264         real_newpath = imap_utf8_to_modified_utf7(newpath, FALSE);
3265         imap_path_separator_subst(real_newpath, separator);
3266
3267         ok = imap_cmd_rename(session, real_oldpath, real_newpath);
3268         if (ok != MAILIMAP_NO_ERROR) {
3269                 log_warning(LOG_PROTOCOL, _("can't rename mailbox: %s to %s\n"),
3270                             real_oldpath, real_newpath);
3271                 g_free(real_oldpath);
3272                 g_free(newpath);
3273                 g_free(real_newpath);
3274                 return -1;
3275         }
3276         g_free(item->name);
3277         item->name = g_strdup(name);
3278
3279         old_cache_dir = folder_item_get_path(item);
3280
3281         paths[0] = g_strdup(item->path);
3282         paths[1] = newpath;
3283         g_node_traverse(item->node, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
3284                         imap_rename_folder_func, paths);
3285
3286         if (is_dir_exist(old_cache_dir)) {
3287                 new_cache_dir = folder_item_get_path(item);
3288                 if (g_rename(old_cache_dir, new_cache_dir) < 0) {
3289                         FILE_OP_ERROR(old_cache_dir, "rename");
3290                 }
3291                 g_free(new_cache_dir);
3292         }
3293
3294         g_free(old_cache_dir);
3295         g_free(paths[0]);
3296         g_free(newpath);
3297         g_free(real_oldpath);
3298         g_free(real_newpath);
3299         return 0;
3300 }
3301
3302 gint imap_subscribe(Folder *folder, FolderItem *item, gchar *rpath, gboolean sub)
3303 {
3304         gchar *path;
3305         gint r = MAILIMAP_NO_ERROR;
3306         IMAPSession *session;
3307         debug_print("getting session...\n");
3308
3309         session = imap_session_get(folder);
3310         if (!session) {
3311                 return -1;
3312         }
3313         if (item && item->path) {
3314                 path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &r);
3315                 if (!path)
3316                         return -1;
3317                 if (is_fatal(r)) {
3318                         g_free(path);
3319                         return -1;
3320                 }
3321                 if (!strcmp(path, "INBOX") && sub == FALSE) {
3322                         g_free(path);
3323                         return -1;
3324                 }
3325                 debug_print("%ssubscribing %s\n", sub?"":"un", path);
3326                 r = imap_threaded_subscribe(folder, path, sub);
3327                 g_free(path);
3328         } else if (rpath) {
3329                 r = imap_threaded_subscribe(folder, rpath, sub);
3330         } else
3331                 return -1;
3332         return r;
3333 }
3334
3335 static gint imap_remove_folder_real(Folder *folder, FolderItem *item)
3336 {
3337         gint ok = MAILIMAP_NO_ERROR;
3338         IMAPSession *session;
3339         gchar *path;
3340         gchar *cache_dir;
3341         gboolean selected_folder;
3342
3343         g_return_val_if_fail(folder != NULL, -1);
3344         g_return_val_if_fail(item != NULL, -1);
3345         g_return_val_if_fail(item->path != NULL, -1);
3346
3347         debug_print("getting session...\n");
3348         session = imap_session_get(folder);
3349         if (!session) {
3350                 return -1;
3351         }
3352         path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &ok);
3353         if (is_fatal(ok)) {
3354                 g_free(path);
3355                 return -1;
3356         }
3357         imap_threaded_subscribe(folder, path, FALSE);
3358
3359         selected_folder = (session->mbox != NULL) &&
3360                           (!strcmp(session->mbox, item->path));
3361         if (selected_folder) {
3362                 ok = imap_cmd_close(session);
3363                 if (ok != MAILIMAP_NO_ERROR) {
3364                         debug_print("close err %d\n", ok);
3365                         return ok;
3366                 }
3367         }
3368         ok = imap_cmd_delete(session, path);
3369         if (ok != MAILIMAP_NO_ERROR && !is_fatal(ok)) {
3370                 gchar *tmp = NULL;
3371
3372                 ok = MAILIMAP_NO_ERROR;
3373                 tmp = g_strdup_printf("%s%c", path,
3374                                 imap_get_path_separator(session, IMAP_FOLDER(folder), path, &ok));
3375                 g_free(path);
3376                 path = tmp;
3377                 if (!is_fatal(ok))
3378                         ok = imap_cmd_delete(session, path);
3379         }
3380
3381         if (ok != MAILIMAP_NO_ERROR) {
3382                 log_warning(LOG_PROTOCOL, _("can't delete mailbox\n"));
3383                 g_free(path);
3384                 return -1;
3385         }
3386
3387         g_free(path);
3388         cache_dir = folder_item_get_path(item);
3389         if (is_dir_exist(cache_dir) && remove_dir_recursive(cache_dir) < 0)
3390                 g_warning("can't remove directory '%s'\n", cache_dir);
3391         g_free(cache_dir);
3392         folder_item_remove(item);
3393         return 0;
3394 }
3395
3396 static gint imap_remove_folder(Folder *folder, FolderItem *item)
3397 {
3398         GNode *node, *next;
3399
3400         g_return_val_if_fail(item != NULL, -1);
3401         g_return_val_if_fail(item->folder != NULL, -1);
3402         g_return_val_if_fail(item->node != NULL, -1);
3403
3404         node = item->node->children;
3405         while (node != NULL) {
3406                 next = node->next;
3407                 if (imap_remove_folder(folder, FOLDER_ITEM(node->data)) < 0)
3408                         return -1;
3409                 node = next;
3410         }
3411         debug_print("IMAP removing %s\n", item->path);
3412
3413         if (imap_remove_all_msg(folder, item) < 0)
3414                 return -1;
3415         return imap_remove_folder_real(folder, item);
3416 }
3417
3418 typedef struct _uncached_data {
3419         IMAPSession *session;
3420         FolderItem *item;
3421         MsgNumberList *numlist;
3422         guint cur;
3423         guint total;
3424         gboolean done;
3425         int ok;
3426 } uncached_data;
3427
3428 static void *imap_get_uncached_messages_thread(void *data)
3429 {
3430         uncached_data *stuff = (uncached_data *)data;
3431         IMAPSession *session = stuff->session;
3432         FolderItem *item = stuff->item;
3433         MsgNumberList *numlist = stuff->numlist;
3434         GSList *newlist = NULL;
3435         GSList *llast = NULL;
3436         GSList *seq_list, *cur;
3437         gboolean got_alien_tags = FALSE;
3438
3439         debug_print("uncached_messages\n");
3440
3441         if (session == NULL || item == NULL || item->folder == NULL
3442             || FOLDER_CLASS(item->folder) != &imap_class) {
3443                 stuff->done = TRUE;
3444                 return NULL;
3445         }
3446
3447         seq_list = imap_get_lep_set_from_numlist(IMAP_FOLDER(item->folder), numlist);
3448         debug_print("get msgs info\n");
3449         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
3450                 struct mailimap_set * imapset;
3451                 unsigned int i;
3452                 int r;
3453                 carray * env_list;
3454                 int count;
3455
3456                 if (session->cancelled)
3457                         break;
3458
3459                 imapset = cur->data;
3460
3461                 r = imap_threaded_fetch_env(session->folder,
3462                                             imapset, &env_list);
3463                 if (r != MAILIMAP_NO_ERROR) {
3464                         imap_handle_error(SESSION(session), NULL, r);
3465                         if (is_fatal(r)) {
3466                                 stuff->ok = r;
3467                                 return NULL;
3468                         }
3469                         continue;
3470                 }
3471
3472                 session_set_access_time(SESSION(session));
3473
3474                 count = 0;
3475                 for(i = 0 ; i < carray_count(env_list) ; i += 2) {
3476                         struct imap_fetch_env_info * info;
3477                         MsgInfo * msginfo;
3478                         GSList *tags = NULL, *cur = NULL;
3479                         info = carray_get(env_list, i);
3480                         tags = carray_get(env_list, i+1);
3481                         msginfo = imap_envelope_from_lep(info, item);
3482                         if (msginfo == NULL) {
3483                                 slist_free_strings_full(tags);
3484                                 continue;
3485                         }
3486                         g_slist_free(msginfo->tags);
3487                         msginfo->tags = NULL;
3488
3489                         for (cur = tags; cur; cur = cur->next) {
3490                                 gchar *real_tag = imap_modified_utf7_to_utf8(cur->data, TRUE);
3491                                 gint id = 0;
3492                                 id = tags_get_id_for_str(real_tag);
3493                                 if (id == -1) {
3494                                         id = tags_add_tag(real_tag);
3495                                         got_alien_tags = TRUE;
3496                                 }
3497                                 if (!g_slist_find(msginfo->tags, GINT_TO_POINTER(id))) {
3498                                         msginfo->tags = g_slist_prepend(
3499                                                         msginfo->tags,
3500                                                         GINT_TO_POINTER(id));
3501                                 }
3502                                 g_free(real_tag);
3503                         }
3504                         if (msginfo->tags)
3505                                 msginfo->tags = g_slist_reverse(msginfo->tags);
3506                         slist_free_strings_full(tags);
3507                         msginfo->folder = item;
3508                         if (!newlist)
3509                                 llast = newlist = g_slist_append(newlist, msginfo);
3510                         else {
3511                                 llast = g_slist_append(llast, msginfo);
3512                                 llast = llast->next;
3513                         }
3514                         count ++;
3515                 }
3516
3517                 imap_fetch_env_free(env_list);
3518         }
3519
3520         if (got_alien_tags) {
3521                 tags_write_tags();
3522                 main_window_reflect_tags_changes(mainwindow_get_mainwindow());
3523         }
3524
3525         imap_lep_set_free(seq_list);
3526
3527         session_set_access_time(SESSION(session));
3528         stuff->done = TRUE;
3529         return newlist;
3530 }
3531
3532 #define MAX_MSG_NUM 50
3533
3534 static GSList *imap_get_uncached_messages(IMAPSession *session,
3535                                         FolderItem *item,
3536                                         MsgNumberList *numlist,
3537                                         int *r)
3538 {
3539         GSList *result = NULL;
3540         GSList * cur;
3541         uncached_data *data = g_new0(uncached_data, 1);
3542
3543         cur = numlist;
3544         data->total = g_slist_length(numlist);
3545         data->ok = MAILIMAP_NO_ERROR;
3546         debug_print("messages list : %i\n", data->total);
3547
3548         while (cur != NULL) {
3549                 GSList * partial_result;
3550                 int count;
3551                 GSList * newlist;
3552                 GSList * llast;
3553
3554                 llast = NULL;
3555                 count = 0;
3556                 newlist = NULL;
3557                 while (count < MAX_MSG_NUM) {
3558                         void * p;
3559
3560                         p = cur->data;
3561
3562                         if (newlist == NULL)
3563                                 llast = newlist = g_slist_append(newlist, p);
3564                         else {
3565                                 llast = g_slist_append(llast, p);
3566                                 llast = llast->next;
3567                         }
3568                         count ++;
3569
3570                         cur = cur->next;
3571                         if (cur == NULL)
3572                                 break;
3573                 }
3574
3575                 data->done = FALSE;
3576                 data->session = session;
3577                 data->item = item;
3578                 data->numlist = newlist;
3579                 data->cur += count;
3580
3581                 if (prefs_common.work_offline &&
3582                     !inc_offline_should_override(FALSE,
3583                         _("Claws Mail needs network access in order "
3584                           "to access the IMAP server."))) {
3585                         g_free(data);
3586                         return NULL;
3587                 }
3588
3589                 partial_result =
3590                         (GSList *)imap_get_uncached_messages_thread(data);
3591                 *r = data->ok;
3592                 if (data->ok != MAILIMAP_NO_ERROR) {
3593                         goto bail;
3594                 }
3595                 statusbar_progress_all(data->cur,data->total, 1);
3596
3597                 g_slist_free(newlist);
3598
3599                 result = g_slist_concat(result, partial_result);
3600         }
3601 bail:
3602         g_free(data);
3603
3604         statusbar_progress_all(0,0,0);
3605         statusbar_pop_all();
3606
3607         return result;
3608 }
3609
3610 static void imap_delete_all_cached_messages(FolderItem *item)
3611 {
3612         gchar *dir;
3613
3614         g_return_if_fail(item != NULL);
3615         g_return_if_fail(item->folder != NULL);
3616         g_return_if_fail(FOLDER_CLASS(item->folder) == &imap_class);
3617
3618         debug_print("Deleting all cached messages...\n");
3619
3620         dir = folder_item_get_path(item);
3621         if (is_dir_exist(dir))
3622                 remove_all_numbered_files(dir);
3623         g_free(dir);
3624
3625         debug_print("done.\n");
3626 }
3627
3628 gchar imap_get_path_separator_for_item(FolderItem *item)
3629 {
3630         Folder *folder = NULL;
3631         IMAPFolder *imap_folder = NULL;
3632         IMAPSession *session = NULL;
3633         gchar result = '/';
3634         gint ok = MAILIMAP_NO_ERROR;
3635         if (!item)
3636                 return '/';
3637         folder = item->folder;
3638
3639         if (!folder)
3640                 return '/';
3641
3642         imap_folder = IMAP_FOLDER(folder);
3643
3644         debug_print("getting session...");
3645         session = imap_session_get(FOLDER(folder));
3646         result = imap_get_path_separator(session, imap_folder, item->path, &ok);
3647         return result;
3648 }
3649
3650 static gchar imap_refresh_path_separator(IMAPSession *session, IMAPFolder *folder, const gchar *subfolder, gint *ok)
3651 {
3652         clist * lep_list;
3653         int r;
3654         gchar separator = '\0';
3655
3656         g_return_val_if_fail(session != NULL, '/');
3657         r = imap_threaded_list((Folder *)folder, "", subfolder, &lep_list);
3658
3659         if (r != MAILIMAP_NO_ERROR) {
3660                 imap_handle_error(SESSION(session), NULL, r);
3661                 log_warning(LOG_PROTOCOL, _("LIST failed\n"));
3662                 *ok = r;
3663                 return '\0';
3664         }
3665
3666         if (lep_list != NULL && clist_count(lep_list) > 0) {
3667                 clistiter * iter = clist_begin(lep_list);
3668                 struct mailimap_mailbox_list * mb;
3669                 mb = clist_content(iter);
3670
3671                 separator = mb->mb_delimiter;
3672                 debug_print("got separator: %c\n", folder->last_seen_separator);
3673         }
3674         *ok = MAILIMAP_NO_ERROR;
3675         mailimap_list_result_free(lep_list);
3676         return separator;
3677 }
3678
3679 static gchar imap_get_path_separator(IMAPSession *session, IMAPFolder *folder, const gchar *path, gint *ok)
3680 {
3681         gchar separator = '/';
3682         *ok = MAILIMAP_NO_ERROR;
3683         if (folder->last_seen_separator == 0) {
3684                 folder->last_seen_separator = imap_refresh_path_separator(session, folder, "", ok);
3685         }
3686
3687         if (folder->last_seen_separator == 0) {
3688                 folder->last_seen_separator = imap_refresh_path_separator(session, folder, "INBOX", ok);
3689         }
3690
3691         if (folder->last_seen_separator != 0) {
3692                 debug_print("using separator: %c\n", folder->last_seen_separator);
3693                 return folder->last_seen_separator;
3694         }
3695
3696         return separator;
3697 }
3698
3699 static gchar *imap_get_real_path(IMAPSession *session, IMAPFolder *folder, const gchar *path, gint *ok)
3700 {
3701         gchar *real_path = NULL;
3702         gchar separator;
3703
3704         g_return_val_if_fail(folder != NULL, NULL);
3705         g_return_val_if_fail(path != NULL, NULL);
3706
3707         *ok = MAILIMAP_NO_ERROR;
3708
3709         real_path = imap_utf8_to_modified_utf7(path, FALSE);
3710         separator = imap_get_path_separator(session, folder, path, ok);
3711         if (*ok == MAILIMAP_NO_ERROR)
3712                 imap_path_separator_subst(real_path, separator);
3713
3714         return real_path;
3715 }
3716
3717 static gint imap_set_message_flags(IMAPSession *session,
3718                                    IMAPFolderItem *item,
3719                                    MsgNumberList *numlist,
3720                                    IMAPFlags flags,
3721                                    GSList *tags,
3722                                    gboolean is_set)
3723 {
3724         gint ok = 0;
3725         GSList *seq_list;
3726         GSList * cur;
3727         gint total = 0;
3728         IMAPFolder *folder = NULL;
3729         GSList *sorted_list = NULL;
3730
3731         if (numlist == NULL || session == NULL)
3732                 return MAILIMAP_ERROR_BAD_STATE;
3733
3734         folder = IMAP_FOLDER(session->folder);
3735
3736         sorted_list = g_slist_copy(numlist);
3737         sorted_list = g_slist_sort(sorted_list, g_int_compare);
3738
3739         cur = g_slist_last(sorted_list);
3740
3741         if (cur)
3742                 total = GPOINTER_TO_INT(cur->data);
3743
3744         seq_list = imap_get_lep_set_from_numlist(IMAP_FOLDER(session->folder), sorted_list);
3745
3746         statusbar_print_all(_("Flagging messages..."));
3747
3748         for(cur = seq_list ; cur != NULL ; cur = g_slist_next(cur)) {
3749                 struct mailimap_set * imapset = (struct mailimap_set *)cur->data;
3750                 struct mailimap_set_item *set_item = NULL;
3751
3752                 if (imapset->set_list)
3753                         set_item = clist_content(clist_begin(imapset->set_list));
3754                 else
3755                         continue;
3756
3757                 if (set_item == NULL)
3758                         continue;
3759
3760                 statusbar_progress_all(set_item->set_first, total, 1);
3761
3762                 ok = imap_cmd_store(session, item, imapset,
3763                                     flags, tags, is_set);
3764                 statusbar_progress_all(set_item->set_last, total, 1);
3765                 if (ok != MAILIMAP_NO_ERROR && folder->max_set_size > 20) {
3766                         /* reduce max set size */
3767                         folder->max_set_size /= 2;
3768                 }
3769                 if (ok != MAILIMAP_NO_ERROR && is_fatal(ok)) {
3770                         break;
3771                 }
3772         }
3773
3774         g_slist_free(sorted_list);
3775
3776         statusbar_progress_all(0,0,0);
3777         statusbar_pop_all();
3778
3779         imap_lep_set_free(seq_list);
3780
3781         return ok;
3782 }
3783
3784 typedef struct _select_data {
3785         IMAPSession *session;
3786         gchar *real_path;
3787         gint *exists;
3788         gint *recent;
3789         gint *unseen;
3790         guint32 *uid_validity;
3791         gboolean done;
3792 } select_data;
3793
3794 static gint imap_select(IMAPSession *session, IMAPFolder *folder,
3795                         FolderItem *item,
3796                         gint *exists, gint *recent, gint *unseen,
3797                         guint32 *uid_validity, gint *can_create_flags,
3798                         gboolean block)
3799 {
3800         gchar *real_path;
3801         gint ok = MAILIMAP_NO_ERROR;
3802         gint exists_, recent_, unseen_;
3803         guint32 uid_validity_;
3804         gint can_create_flags_;
3805         const gchar *path = item ? item->path:NULL;
3806
3807         if (!item) {
3808                 return MAILIMAP_ERROR_BAD_STATE;
3809         }
3810
3811         if (!exists && !recent && !unseen && !uid_validity && !can_create_flags) {
3812                 if (session->mbox && strcmp(session->mbox, path) == 0)
3813                         return MAILIMAP_NO_ERROR;
3814         }
3815         if (!exists && !recent && !unseen && !uid_validity && can_create_flags) {
3816                 if (session->mbox && strcmp(session->mbox, path) == 0) {
3817                         if (IMAP_FOLDER_ITEM(item)->can_create_flags != ITEM_CAN_CREATE_FLAGS_UNKNOWN)
3818                                 return MAILIMAP_NO_ERROR;
3819                 }
3820         }
3821         if (!exists)
3822                 exists = &exists_;
3823         if (!recent)
3824                 recent = &recent_;
3825         if (!unseen)
3826                 unseen = &unseen_;
3827         if (!uid_validity)
3828                 uid_validity = &uid_validity_;
3829         if (!can_create_flags)
3830                 can_create_flags = &can_create_flags_;
3831
3832         g_free(session->mbox);
3833         session->mbox = NULL;
3834         session->exists = 0;
3835         session->recent = 0;
3836         session->expunge = 0;
3837
3838         real_path = imap_get_real_path(session, folder, path, &ok);
3839         if (is_fatal(ok)) {
3840                 g_free(real_path);
3841                 return ok;
3842         }
3843         g_slist_free(IMAP_FOLDER_ITEM(item)->ok_flags);
3844         IMAP_FOLDER_ITEM(item)->ok_flags = NULL;
3845         ok = imap_cmd_select(session, real_path,
3846                              exists, recent, unseen, uid_validity, can_create_flags,
3847                              &(IMAP_FOLDER_ITEM(item)->ok_flags), block);
3848         if (ok != MAILIMAP_NO_ERROR) {
3849                 log_warning(LOG_PROTOCOL, _("can't select folder: %s\n"), real_path);
3850         } else {
3851                 session->mbox = g_strdup(path);
3852                 session->folder_content_changed = FALSE;
3853                 session->exists = *exists;
3854                 session->recent = *recent;
3855                 session->expunge = 0;
3856                 session->unseen = *unseen;
3857                 session->uid_validity = *uid_validity;
3858                 debug_print("select: exists %d recent %d expunge %d uid_validity %d can_create_flags %d\n",
3859                         session->exists, session->recent, session->expunge,
3860                         session->uid_validity, *can_create_flags);
3861         }
3862         if (*can_create_flags) {
3863                 IMAP_FOLDER_ITEM(item)->can_create_flags = ITEM_CAN_CREATE_FLAGS;
3864         } else {
3865                 IMAP_FOLDER_ITEM(item)->can_create_flags = ITEM_CANNOT_CREATE_FLAGS;
3866         }
3867         g_free(real_path);
3868
3869         return ok;
3870 }
3871
3872 static gint imap_status(IMAPSession *session, IMAPFolder *folder,
3873                         const gchar *path, IMAPFolderItem *item,
3874                         gint *messages,
3875                         guint32 *uid_next, guint32 *uid_validity,
3876                         gint *unseen, gboolean block)
3877 {
3878         int r = MAILIMAP_NO_ERROR;
3879         clistiter * iter;
3880         struct mailimap_mailbox_data_status * data_status;
3881         int got_values;
3882         gchar *real_path;
3883         guint mask = 0;
3884
3885         real_path = imap_get_real_path(session, folder, path, &r);
3886         if (is_fatal(r)) {
3887                 g_free(real_path);
3888                 return r;
3889         }
3890         if (messages) {
3891                 mask |= 1 << 0;
3892                 *messages = 0;
3893         }
3894         if (uid_next) {
3895                 mask |= 1 << 2;
3896                 *uid_next = 0;
3897         }
3898         if (uid_validity) {
3899                 mask |= 1 << 3;
3900                 *uid_validity = 0;
3901         }
3902         if (unseen) {
3903                 mask |= 1 << 4;
3904                 *unseen = 0;
3905         }
3906
3907         if (session->mbox != NULL &&
3908             !strcmp(session->mbox, item->item.path)) {
3909                 r = imap_cmd_close(session);
3910                 if (r != MAILIMAP_NO_ERROR) {
3911                         debug_print("close err %d\n", r);
3912                         g_free(real_path);
3913                         return r;
3914                 }
3915         }
3916
3917         r = imap_threaded_status(FOLDER(folder), real_path,
3918                 &data_status, mask);
3919
3920         g_free(real_path);
3921         if (r != MAILIMAP_NO_ERROR) {
3922                 imap_handle_error(SESSION(session), NULL, r);
3923                 debug_print("status err %d\n", r);
3924                 return r;
3925         }
3926
3927         if (data_status == NULL || data_status->st_info_list == NULL) {
3928                 debug_print("data_status %p\n", data_status);
3929                 if (data_status) {
3930                         debug_print("data_status->st_info_list %p\n", data_status->st_info_list);
3931                         mailimap_mailbox_data_status_free(data_status);
3932                 }
3933                 return MAILIMAP_ERROR_BAD_STATE;
3934         }
3935
3936         got_values = 0;
3937         if (data_status->st_info_list) {
3938                 for(iter = clist_begin(data_status->st_info_list) ; iter != NULL ;
3939                     iter = clist_next(iter)) {
3940                         struct mailimap_status_info * info;
3941
3942                         info = clist_content(iter);
3943                         switch (info->st_att) {
3944                         case MAILIMAP_STATUS_ATT_MESSAGES:
3945                                 if (messages) {
3946                                         * messages = info->st_value;
3947                                         got_values |= 1 << 0;
3948                                 }
3949                                 break;
3950
3951                         case MAILIMAP_STATUS_ATT_UIDNEXT:
3952                                 if (uid_next) {
3953                                         * uid_next = info->st_value;
3954                                         got_values |= 1 << 2;
3955                                 }
3956                                 break;
3957
3958                         case MAILIMAP_STATUS_ATT_UIDVALIDITY:
3959                                 if (uid_validity) {
3960                                         * uid_validity = info->st_value;
3961                                         got_values |= 1 << 3;
3962                                 }
3963                                 break;
3964
3965                         case MAILIMAP_STATUS_ATT_UNSEEN:
3966                                 if (unseen) {
3967                                         * unseen = info->st_value;
3968                                         got_values |= 1 << 4;
3969                                 }
3970                                 break;
3971                         }
3972                 }
3973         }
3974         mailimap_mailbox_data_status_free(data_status);
3975
3976         if (got_values != mask) {
3977                 g_warning("status: incomplete values received (%d)\n", got_values);
3978         }
3979         return MAILIMAP_NO_ERROR;
3980 }
3981
3982 static void imap_free_capabilities(IMAPSession *session)
3983 {
3984         slist_free_strings_full(session->capability);
3985         session->capability = NULL;
3986 }
3987
3988 /* low-level IMAP4rev1 commands */
3989
3990 static gint imap_cmd_login(IMAPSession *session,
3991                            const gchar *user, const gchar *pass,
3992                            const gchar *type)
3993 {
3994         int r;
3995         gint ok;
3996
3997         if (!strcmp(type, "LOGIN") && imap_has_capability(session, "LOGINDISABLED")) {
3998                 gint ok = MAILIMAP_ERROR_BAD_STATE;
3999                 if (imap_has_capability(session, "STARTTLS")) {
4000 #ifdef USE_GNUTLS
4001                         log_warning(LOG_PROTOCOL, _("Server requires TLS to log in.\n"));
4002                         ok = imap_cmd_starttls(session);
4003                         if (ok != MAILIMAP_NO_ERROR) {
4004                                 log_warning(LOG_PROTOCOL, _("Can't start TLS session.\n"));
4005                                 return ok;
4006                         } else {
4007                                 /* refresh capas */
4008                                 imap_free_capabilities(session);
4009                                 if ((r = imap_get_capabilities(session)) != MAILIMAP_NO_ERROR) {
4010                                         imap_handle_error(SESSION(session), NULL, r);
4011                                         log_warning(LOG_PROTOCOL, _("Can't refresh capabilities.\n"));
4012                                         return r;
4013                                 }
4014                         }
4015 #else
4016                         log_error(LOG_PROTOCOL, _("Connection to %s failed: "
4017                                         "server requires TLS, but Claws Mail "
4018                                         "has been compiled without OpenSSL "
4019                                         "support.\n"),
4020                                         SESSION(session)->server);
4021                         return MAILIMAP_ERROR_LOGIN;
4022 #endif
4023                 } else {
4024                         log_error(LOG_PROTOCOL, _("Server logins are disabled.\n"));
4025                         return MAILIMAP_ERROR_LOGIN;
4026                 }
4027         }
4028
4029         log_print(LOG_PROTOCOL, "IMAP4> Logging %s to %s using %s\n",
4030                         user,
4031                         SESSION(session)->server,
4032                         type);
4033         r = imap_threaded_login(session->folder, user, pass, type);
4034         if (r != MAILIMAP_NO_ERROR) {
4035                 imap_handle_error(SESSION(session), NULL, r);
4036                 log_print(LOG_PROTOCOL, "IMAP4< Error logging in to %s\n",
4037                                 SESSION(session)->server);
4038                 ok = r;
4039         } else {
4040                 log_print(LOG_PROTOCOL, "IMAP4< Login to %s successful\n",
4041                                 SESSION(session)->server);
4042                 ok = MAILIMAP_NO_ERROR;
4043         }
4044         return ok;
4045 }
4046
4047 static gint imap_cmd_noop(IMAPSession *session)
4048 {
4049         int r;
4050         unsigned int exists, recent, expunge, unseen, uidnext, uidval;
4051
4052         r = imap_threaded_noop(session->folder, &exists, &recent, &expunge, &unseen, &uidnext, &uidval);
4053         if (r != MAILIMAP_NO_ERROR) {
4054                 imap_handle_error(SESSION(session), NULL, r);
4055                 debug_print("noop err %d\n", r);
4056                 return r;
4057         }
4058
4059         if ((exists && exists != session->exists)
4060          || (recent && recent != session->recent)
4061          || (expunge && expunge != session->expunge)
4062          || (unseen && unseen != session->unseen)) {
4063                 session->folder_content_changed = TRUE;
4064         }
4065         if (uidnext != 0 && uidnext != session->uid_next) {
4066                 session->uid_next = uidnext;
4067                 session->folder_content_changed = TRUE;
4068         }
4069         if (uidval != 0 && uidval != session->uid_validity) {
4070                 session->uid_validity = uidval;
4071                 session->folder_content_changed = TRUE;
4072         }
4073
4074         session->exists = exists;
4075         session->recent = recent;
4076         session->expunge = expunge;
4077         session->unseen = unseen;
4078
4079         session_set_access_time(SESSION(session));
4080
4081         return MAILIMAP_NO_ERROR;
4082 }
4083
4084 #ifdef USE_GNUTLS
4085 static gint imap_cmd_starttls(IMAPSession *session)
4086 {
4087         int r;
4088
4089         r = imap_threaded_starttls(session->folder,
4090                 SESSION(session)->server, SESSION(session)->port);
4091         if (r != MAILIMAP_NO_ERROR) {
4092                 imap_handle_error(SESSION(session), NULL, r);
4093                 debug_print("starttls err %d\n", r);
4094                 return r;
4095         }
4096         return MAILIMAP_NO_ERROR;
4097 }
4098 #endif
4099
4100 static gint imap_cmd_select(IMAPSession *session, const gchar *folder,
4101                             gint *exists, gint *recent, gint *unseen,
4102                             guint32 *uid_validity, gint *can_create_flags,
4103                             GSList **ok_flags, gboolean block)
4104 {
4105         int r;
4106
4107         r = imap_threaded_select(session->folder, folder,
4108                                  exists, recent, unseen, uid_validity, can_create_flags, ok_flags);
4109         if (r != MAILIMAP_NO_ERROR) {
4110                 imap_handle_error(SESSION(session), NULL, r);
4111                 debug_print("select err %d\n", r);
4112                 return r;
4113         }
4114         return MAILIMAP_NO_ERROR;
4115 }
4116
4117 static gint imap_cmd_close(IMAPSession *session)
4118 {
4119         int r;
4120
4121         r = imap_threaded_close(session->folder);
4122         if (r != MAILIMAP_NO_ERROR) {
4123                 imap_handle_error(SESSION(session), NULL, r);
4124                 debug_print("close err %d\n", r);
4125                 return r;
4126         }
4127         g_free(session->mbox);
4128         session->mbox = NULL;
4129         session->exists = 0;
4130         session->recent = 0;
4131         session->expunge = 0;
4132         return MAILIMAP_NO_ERROR;
4133 }
4134
4135 static gint imap_cmd_examine(IMAPSession *session, const gchar *folder,
4136                              gint *exists, gint *recent, gint *unseen,
4137                              guint32 *uid_validity, gboolean block)
4138 {
4139         int r;
4140
4141         r = imap_threaded_examine(session->folder, folder,
4142                                   exists, recent, unseen, uid_validity);
4143         if (r != MAILIMAP_NO_ERROR) {
4144                 imap_handle_error(SESSION(session), NULL, r);
4145                 debug_print("examine err %d\n", r);
4146
4147                 return r;
4148         }
4149         return MAILIMAP_NO_ERROR;
4150 }
4151
4152 static gint imap_cmd_create(IMAPSession *session, const gchar *folder)
4153 {
4154         int r;
4155
4156         r = imap_threaded_create(session->folder, folder);
4157         if (r != MAILIMAP_NO_ERROR) {
4158                 imap_handle_error(SESSION(session), NULL, r);
4159                 return r;
4160         }
4161
4162         return MAILIMAP_NO_ERROR;
4163 }
4164
4165 static gint imap_cmd_rename(IMAPSession *session, const gchar *old_folder,
4166                             const gchar *new_folder)
4167 {
4168         int r;
4169
4170         r = imap_threaded_rename(session->folder, old_folder,
4171                                  new_folder);
4172         if (r != MAILIMAP_NO_ERROR) {
4173                 imap_handle_error(SESSION(session), NULL, r);
4174                 return r;
4175         }
4176
4177         return MAILIMAP_NO_ERROR;
4178 }
4179
4180 static gint imap_cmd_delete(IMAPSession *session, const gchar *folder)
4181 {
4182         int r;
4183
4184
4185         r = imap_threaded_delete(session->folder, folder);
4186         if (r != MAILIMAP_NO_ERROR) {
4187                 imap_handle_error(SESSION(session), NULL, r);
4188                 return r;
4189         }
4190
4191         return MAILIMAP_NO_ERROR;
4192 }
4193
4194 typedef struct _fetch_data {
4195         IMAPSession *session;
4196         guint32 uid;
4197         const gchar *filename;
4198         gboolean headers;
4199         gboolean body;
4200         gboolean done;
4201 } fetch_data;
4202
4203 static void *imap_cmd_fetch_thread(void *data)
4204 {
4205         fetch_data *stuff = (fetch_data *)data;
4206         IMAPSession *session = stuff->session;
4207         guint32 uid = stuff->uid;
4208         const gchar *filename = stuff->filename;
4209         int r;
4210
4211         if (stuff->body) {
4212                 r = imap_threaded_fetch_content(session->folder,
4213                                                uid, 1, filename);
4214         }
4215         else {
4216                 r = imap_threaded_fetch_content(session->folder,
4217                                                 uid, 0, filename);
4218         }
4219         if (r != MAILIMAP_NO_ERROR) {
4220                 imap_handle_error(SESSION(session), NULL, r);
4221                 debug_print("fetch err %d\n", r);
4222                 return GINT_TO_POINTER(r);
4223         }
4224         return GINT_TO_POINTER(MAILIMAP_NO_ERROR);
4225 }
4226
4227 static gint imap_cmd_fetch(IMAPSession *session, guint32 uid,
4228                                 const gchar *filename, gboolean headers,
4229                                 gboolean body)
4230 {
4231         fetch_data *data = g_new0(fetch_data, 1);
4232         int result = 0;
4233         data->done = FALSE;
4234         data->session = session;
4235         data->uid = uid;
4236         data->filename = filename;
4237         data->headers = headers;
4238         data->body = body;
4239
4240         if (prefs_common.work_offline &&
4241             !inc_offline_should_override(FALSE,
4242                 _("Claws Mail needs network access in order "
4243                   "to access the IMAP server."))) {
4244                 g_free(data);
4245                 return -1;
4246         }
4247         statusbar_print_all(_("Fetching message..."));
4248         result = GPOINTER_TO_INT(imap_cmd_fetch_thread(data));
4249         statusbar_pop_all();
4250         g_free(data);
4251         return result;
4252 }
4253
4254
4255 static gint imap_cmd_append(IMAPSession *session,
4256                             IMAPFolderItem *item,
4257                             const gchar *destfolder,
4258                             const gchar *file, IMAPFlags flags,
4259                             guint32 *new_uid)
4260 {
4261         struct mailimap_flag_list * flag_list;
4262         int r;
4263
4264         cm_return_val_if_fail(file != NULL, MAILIMAP_ERROR_BAD_STATE);
4265
4266         flag_list = imap_flag_to_lep(item, flags, NULL);
4267         lock_session(session);
4268         r = imap_threaded_append(session->folder, destfolder,
4269                          file, flag_list, (int *)new_uid);
4270         mailimap_flag_list_free(flag_list);
4271
4272         if (r != MAILIMAP_NO_ERROR) {
4273                 imap_handle_error(SESSION(session), NULL, r);
4274                 debug_print("append err %d\n", r);
4275                 return r;
4276         }
4277
4278         unlock_session(session);
4279
4280         return MAILIMAP_NO_ERROR;
4281 }
4282
4283 static gint imap_cmd_copy(IMAPSession *session, struct mailimap_set * set,
4284                           const gchar *destfolder,
4285                           struct mailimap_set **source, struct mailimap_set **dest)
4286 {
4287         int r;
4288
4289         g_return_val_if_fail(session != NULL, MAILIMAP_ERROR_BAD_STATE);
4290         g_return_val_if_fail(set != NULL, MAILIMAP_ERROR_BAD_STATE);
4291         g_return_val_if_fail(destfolder != NULL, MAILIMAP_ERROR_BAD_STATE);
4292
4293         r = imap_threaded_copy(session->folder, set, destfolder, source, dest);
4294         if (r != MAILIMAP_NO_ERROR) {
4295                 imap_handle_error(SESSION(session), NULL, r);
4296                 return r;
4297         }
4298
4299         return MAILIMAP_NO_ERROR;
4300 }
4301
4302 static gint imap_cmd_store(IMAPSession *session,
4303                            IMAPFolderItem *item,
4304                            struct mailimap_set * set,
4305                            IMAPFlags flags, GSList *tags, int do_add)
4306 {
4307         int r;
4308         struct mailimap_flag_list * flag_list = NULL;
4309         struct mailimap_store_att_flags * store_att_flags;
4310
4311         flag_list = imap_flag_to_lep(item, flags, tags);
4312
4313         if (do_add)
4314                 store_att_flags =
4315                         mailimap_store_att_flags_new_add_flags_silent(flag_list);
4316         else
4317                 store_att_flags =
4318                         mailimap_store_att_flags_new_remove_flags_silent(flag_list);
4319
4320         r = imap_threaded_store(session->folder, set, store_att_flags);
4321         mailimap_store_att_flags_free(store_att_flags);
4322         if (r != MAILIMAP_NO_ERROR) {
4323                 imap_handle_error(SESSION(session), NULL, r);
4324                 return r;
4325         }
4326
4327         return MAILIMAP_NO_ERROR;
4328 }
4329
4330 static gint imap_cmd_expunge(IMAPSession *session, gboolean do_expunge)
4331 {
4332         int r;
4333
4334         if (!do_expunge)
4335                 return MAILIMAP_NO_ERROR;
4336
4337         if (prefs_common.work_offline &&
4338             !inc_offline_should_override(FALSE,
4339                 _("Claws Mail needs network access in order "
4340                   "to access the IMAP server."))) {
4341                 return -1;
4342         }
4343
4344         r = imap_threaded_expunge(session->folder);
4345         if (r != MAILIMAP_NO_ERROR) {
4346                 imap_handle_error(SESSION(session), NULL, r);
4347                 return r;
4348         }
4349
4350         return MAILIMAP_NO_ERROR;
4351 }
4352
4353 gint imap_expunge(Folder *folder, FolderItem *item)
4354 {
4355         IMAPSession *session = imap_session_get(folder);
4356         if (session == NULL)
4357                 return -1;
4358
4359         return imap_cmd_expunge(session, TRUE);
4360 }
4361
4362 static void imap_path_separator_subst(gchar *str, gchar separator)
4363 {
4364         gchar *p;
4365         gboolean in_escape = FALSE;
4366
4367         if (!separator || separator == '/') return;
4368
4369         for (p = str; *p != '\0'; p++) {
4370                 if (*p == '/' && !in_escape)
4371                         *p = separator;
4372                 else if (*p == '&' && *(p + 1) != '-' && !in_escape)
4373                         in_escape = TRUE;
4374                 else if (*p == '-' && in_escape)
4375                         in_escape = FALSE;
4376         }
4377 }
4378
4379 static gboolean imap_rename_folder_func(GNode *node, gpointer data)
4380 {
4381         FolderItem *item = node->data;
4382         gchar **paths = data;
4383         const gchar *oldpath = paths[0];
4384         const gchar *newpath = paths[1];
4385         gchar *real_oldpath, *real_newpath;
4386         gchar *base;
4387         gchar *new_itempath;
4388         gint oldpathlen;
4389         IMAPSession *session = imap_session_get(item->folder);
4390         gint ok = MAILIMAP_NO_ERROR;
4391         oldpathlen = strlen(oldpath);
4392         if (strncmp(oldpath, item->path, oldpathlen) != 0) {
4393                 g_warning("path doesn't match: %s, %s\n", oldpath, item->path);
4394                 return TRUE;
4395         }
4396
4397         base = item->path + oldpathlen;
4398         while (*base == G_DIR_SEPARATOR) base++;
4399         if (*base == '\0')
4400                 new_itempath = g_strdup(newpath);
4401         else
4402                 new_itempath = g_strconcat(newpath, G_DIR_SEPARATOR_S, base,
4403                                            NULL);
4404
4405         real_oldpath = imap_get_real_path(session, IMAP_FOLDER(item->folder), item->path, &ok);
4406         g_free(item->path);
4407         item->path = new_itempath;
4408
4409         real_newpath = imap_get_real_path(session, IMAP_FOLDER(item->folder), item->path, &ok);
4410
4411         imap_threaded_subscribe(item->folder, real_oldpath, FALSE);
4412         imap_threaded_subscribe(item->folder, real_newpath, TRUE);
4413
4414         g_free(real_oldpath);
4415         g_free(real_newpath);
4416         return FALSE;
4417 }
4418
4419 static gint get_list_of_uids(IMAPSession *session, Folder *folder, IMAPFolderItem *item, GSList **msgnum_list)
4420 {
4421         GSList *uidlist, *elem;
4422         int r = -1;
4423         clist * lep_uidlist;
4424         gint ok, nummsgs = 0;
4425
4426         if (session == NULL) {
4427                 return -1;
4428         }
4429
4430         ok = imap_select(session, IMAP_FOLDER(folder), FOLDER_ITEM(item),
4431                          NULL, NULL, NULL, NULL, NULL, TRUE);
4432         if (ok != MAILIMAP_NO_ERROR) {
4433                 return -1;
4434         }
4435
4436         g_slist_free(item->uid_list);
4437         item->uid_list = NULL;
4438
4439         uidlist = NULL;
4440
4441         if (folder->account && folder->account->low_bandwidth) {
4442                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SIMPLE,
4443                                 NULL, NULL, NULL, &lep_uidlist);
4444         }
4445
4446         if (r == MAILIMAP_NO_ERROR) {
4447                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
4448                 mailimap_search_result_free(lep_uidlist);
4449         } else {
4450                 carray * lep_uidtab;
4451                 if (r != -1) { /* inited */
4452                         imap_handle_error(SESSION(session), NULL, r);
4453                         if (is_fatal(r))
4454                                 return -1;
4455                 }
4456                 r = imap_threaded_fetch_uid(folder, 1,
4457                                     &lep_uidtab);
4458                 if (r == MAILIMAP_NO_ERROR) {
4459                         uidlist = imap_uid_list_from_lep_tab(lep_uidtab);
4460                         imap_fetch_uid_list_free(lep_uidtab);
4461                 }
4462         }
4463
4464         if (r != MAILIMAP_NO_ERROR) {
4465                 imap_handle_error(SESSION(session), NULL, r);
4466                 return -1;
4467         }
4468
4469         for (elem = uidlist; elem != NULL; elem = g_slist_next(elem)) {
4470                 guint msgnum;
4471
4472                 msgnum = GPOINTER_TO_INT(elem->data);
4473
4474                 *msgnum_list = g_slist_prepend(*msgnum_list, GINT_TO_POINTER(msgnum));
4475                 item->uid_list = g_slist_prepend(item->uid_list, GINT_TO_POINTER(msgnum));
4476                 nummsgs++;
4477         }
4478         g_slist_free(uidlist);
4479
4480         unlock_session(session); /* locked from imap_get_num_list */
4481
4482         return nummsgs;
4483
4484 }
4485
4486 gint imap_get_num_list(Folder *folder, FolderItem *_item, GSList **msgnum_list, gboolean *old_uids_valid)
4487 {
4488         IMAPFolderItem *item = (IMAPFolderItem *)_item;
4489         IMAPSession *session;
4490         gint nummsgs;
4491         GSList *uidlist = NULL;
4492         gchar *dir;
4493         gint known_list_len = 0;
4494         debug_print("get_num_list\n");
4495
4496         g_return_val_if_fail(folder != NULL, -1);
4497         g_return_val_if_fail(item != NULL, -1);
4498         g_return_val_if_fail(item->item.path != NULL, -1);
4499         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
4500         g_return_val_if_fail(folder->account != NULL, -1);
4501
4502         known_list_len = g_slist_length(item->uid_list);
4503         if (!item->should_update) {
4504                 debug_print("get_num_list: nothing to update\n");
4505                 *old_uids_valid = TRUE;
4506                 if (known_list_len == item->item.total_msgs
4507                  && known_list_len > 0) {
4508                         *msgnum_list = g_slist_copy(item->uid_list);
4509                         return known_list_len;
4510                 } else {
4511                         debug_print("don't know the list length...\n");
4512                 }
4513         }
4514
4515         if (prefs_common.work_offline &&
4516             !inc_offline_should_override(FALSE,
4517                 _("Claws Mail needs network access in order "
4518                   "to access the IMAP server."))) {
4519                 return -1;
4520         }
4521
4522         debug_print("getting session...\n");
4523         session = imap_session_get(folder);
4524         g_return_val_if_fail(session != NULL, -1);
4525
4526         lock_session(session); /* unlocked by get_list_of_uids */
4527         if (FOLDER_ITEM(item)->path)
4528                 statusbar_print_all(_("Scanning folder %s%c%s..."),
4529                                       FOLDER_ITEM(item)->folder->name,
4530                                       G_DIR_SEPARATOR,
4531                                       FOLDER_ITEM(item)->path);
4532         else
4533                 statusbar_print_all(_("Scanning folder %s..."),
4534                                       FOLDER_ITEM(item)->folder->name);
4535
4536         if (item->should_trash_cache) {
4537                 *old_uids_valid = FALSE;
4538                 debug_print("get_num_list: trashing num list\n");
4539                 debug_print("Freeing imap uid cache\n");
4540                 item->lastuid = 0;
4541                 g_slist_free(item->uid_list);
4542                 item->uid_list = NULL;
4543
4544                 imap_delete_all_cached_messages((FolderItem *)item);
4545         } else {
4546                 debug_print("get_num_list: updating num list\n");
4547                 *old_uids_valid = TRUE;
4548         }
4549
4550         nummsgs = get_list_of_uids(session, folder, item, &uidlist);
4551         /* session could be broken now, in case of fatal error */
4552
4553         debug_print("get_num_list: got %d msgs\n", nummsgs);
4554
4555         if (nummsgs < 0) {
4556                 statusbar_pop_all();
4557                 return -1;
4558         }
4559
4560         *msgnum_list = uidlist;
4561
4562         dir = folder_item_get_path((FolderItem *)item);
4563         debug_print("removing old messages from %s\n", dir);
4564         remove_numbered_files_not_in_list(dir, *msgnum_list);
4565         g_free(dir);
4566
4567         debug_print("get_num_list - ok - %i\n", nummsgs);
4568         statusbar_pop_all();
4569         item->should_trash_cache = FALSE;
4570         item->should_update = FALSE;
4571         return nummsgs;
4572 }
4573
4574 static MsgInfo *imap_parse_msg(const gchar *file, FolderItem *item)
4575 {
4576         MsgInfo *msginfo;
4577         MsgFlags flags;
4578
4579         flags.perm_flags = MSG_NEW|MSG_UNREAD;
4580         flags.tmp_flags = 0;
4581
4582         g_return_val_if_fail(item != NULL, NULL);
4583         g_return_val_if_fail(file != NULL, NULL);
4584
4585         if (folder_has_parent_of_type(item, F_QUEUE)) {
4586                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
4587         } else if (folder_has_parent_of_type(item, F_DRAFT)) {
4588                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
4589         }
4590
4591         msginfo = procheader_parse_file(file, flags, FALSE, FALSE);
4592         if (!msginfo) return NULL;
4593
4594         msginfo->plaintext_file = g_strdup(file);
4595         msginfo->folder = item;
4596
4597         return msginfo;
4598 }
4599
4600 GSList *imap_get_msginfos(Folder *folder, FolderItem *item,
4601                           GSList *msgnum_list)
4602 {
4603         IMAPSession *session;
4604         MsgInfoList *ret = NULL;
4605         gint ok;
4606
4607         debug_print("get_msginfos\n");
4608
4609         g_return_val_if_fail(folder != NULL, NULL);
4610         g_return_val_if_fail(item != NULL, NULL);
4611         g_return_val_if_fail(msgnum_list != NULL, NULL);
4612
4613         debug_print("getting session...\n");
4614         session = imap_session_get(folder);
4615         g_return_val_if_fail(session != NULL, NULL);
4616
4617         lock_session(session); /* unlocked later in the function */
4618
4619         debug_print("IMAP getting msginfos\n");
4620         ok = imap_select(session, IMAP_FOLDER(folder), item,
4621                          NULL, NULL, NULL, NULL, NULL, FALSE);
4622         if (ok != MAILIMAP_NO_ERROR) {
4623                 return NULL;
4624         }
4625         if (!(folder_has_parent_of_type(item, F_DRAFT) ||
4626               folder_has_parent_of_type(item, F_QUEUE))) {
4627                 ret = g_slist_concat(ret,
4628                         imap_get_uncached_messages(session, item,
4629                                                    msgnum_list, &ok));
4630                 if (ok != MAILIMAP_NO_ERROR)
4631                         return NULL;
4632                 unlock_session(session);
4633         } else {
4634                 MsgNumberList *sorted_list, *elem, *llast = NULL;
4635                 gint startnum, lastnum;
4636
4637                 unlock_session(session);
4638
4639                 sorted_list = g_slist_sort(g_slist_copy(msgnum_list), g_int_compare);
4640
4641                 startnum = lastnum = GPOINTER_TO_INT(sorted_list->data);
4642
4643                 llast = g_slist_last(ret);
4644                 for (elem = sorted_list;; elem = g_slist_next(elem)) {
4645                         guint num = 0;
4646
4647                         if (elem)
4648                                 num = GPOINTER_TO_INT(elem->data);
4649
4650                         if (num > lastnum + 1 || elem == NULL) {
4651                                 int i;
4652                                 for (i = startnum; i <= lastnum; ++i) {
4653                                         gchar *file;
4654                                         file = imap_fetch_msg(folder, item, i);
4655                                         if (file != NULL) {
4656                                                 MsgInfo *msginfo = imap_parse_msg(file, item);
4657                                                 if (msginfo != NULL) {
4658                                                         msginfo->msgnum = i;
4659                                                         if (llast == NULL)
4660                                                                 llast = ret = g_slist_append(ret, msginfo);
4661                                                         else {
4662                                                                 llast = g_slist_append(llast, msginfo);
4663                                                                 llast = llast->next;
4664                                                         }
4665                                                 }
4666                                                 g_free(file);
4667                                         }
4668                                 }
4669
4670                                 if (elem == NULL)
4671                                         break;
4672
4673                                 startnum = num;
4674                         }
4675                         lastnum = num;
4676                 }
4677
4678                 g_slist_free(sorted_list);
4679         }
4680         return ret;
4681 }
4682
4683 MsgInfo *imap_get_msginfo(Folder *folder, FolderItem *item, gint uid)
4684 {
4685         MsgInfo *msginfo = NULL;
4686         MsgInfoList *msginfolist;
4687         MsgNumberList numlist;
4688
4689         numlist.next = NULL;
4690         numlist.data = GINT_TO_POINTER(uid);
4691
4692         msginfolist = imap_get_msginfos(folder, item, &numlist);
4693         if (msginfolist != NULL) {
4694                 msginfo = msginfolist->data;
4695                 g_slist_free(msginfolist);
4696         }
4697
4698         return msginfo;
4699 }
4700
4701 gboolean imap_scan_required(Folder *folder, FolderItem *_item)
4702 {
4703         IMAPSession *session;
4704         IMAPFolderItem *item = (IMAPFolderItem *)_item;
4705         gint ok, exists = 0, unseen = 0;
4706         guint32 uid_next = 0, uid_val = 0;
4707         gboolean selected_folder;
4708
4709         g_return_val_if_fail(folder != NULL, FALSE);
4710         g_return_val_if_fail(item != NULL, FALSE);
4711         g_return_val_if_fail(item->item.folder != NULL, FALSE);
4712         g_return_val_if_fail(FOLDER_CLASS(item->item.folder) == &imap_class, FALSE);
4713
4714         if (item->item.path == NULL)
4715                 return FALSE;
4716
4717         if (item->should_update) {
4718                 debug_print("scan already required\n");
4719                 return TRUE;
4720         }
4721         debug_print("getting session...\n");
4722         session = imap_session_get(folder);
4723
4724         g_return_val_if_fail(session != NULL, FALSE);
4725         lock_session(session); /* unlocked later in the function */
4726
4727         selected_folder = (session->mbox != NULL) &&
4728                           (!strcmp(session->mbox, item->item.path));
4729         if (selected_folder) {
4730                 if (!session->folder_content_changed) {
4731                         ok = imap_cmd_noop(session);
4732                         if (ok != MAILIMAP_NO_ERROR) {
4733                                 debug_print("disconnected!\n");
4734                                 if (!is_fatal(ok))
4735                                         session = imap_reconnect_if_possible(folder, session);
4736                                 else
4737                                         session = imap_session_get(folder);
4738                                 if (session == NULL)
4739                                         return FALSE;
4740                         }
4741
4742                         if (session->folder_content_changed) {
4743                                 debug_print("CHANGED (self-noop)! scan_required\n");
4744                                 item->should_update = TRUE;
4745                                 if (session->uid_validity && session->uid_validity != item->item.mtime) {
4746                                         item->item.mtime = session->uid_validity;
4747                                         item->should_trash_cache = TRUE;
4748                                 }
4749                                 unlock_session(session);
4750                                 return TRUE;
4751                         }
4752                 } else {
4753                         debug_print("CHANGED (previous noop)! scan_required\n");
4754                         item->should_update = TRUE;
4755                         if (session->uid_validity && session->uid_validity != item->item.mtime) {
4756                                 item->item.mtime = session->uid_validity;
4757                                 item->should_trash_cache = TRUE;
4758                         }
4759                         unlock_session(session);
4760                         return TRUE;
4761                 }
4762         } else {
4763                 ok = imap_status(session, IMAP_FOLDER(folder), item->item.path, IMAP_FOLDER_ITEM(item),
4764                                  &exists, &uid_next, &uid_val, &unseen, FALSE);
4765                 if (ok != MAILIMAP_NO_ERROR) {
4766                         return FALSE;
4767                 }
4768
4769                 debug_print("exists %d, item->item.total_msgs %d\n",
4770                         exists, item->item.total_msgs);
4771                 if (exists != item->item.total_msgs
4772                     || unseen != item->item.unread_msgs
4773                     || uid_next != item->uid_next
4774                     || uid_val != item->item.mtime) {
4775                         debug_print("CHANGED (status)! scan_required\n");
4776                         item->last_change = time(NULL);
4777                         item->should_update = TRUE;
4778                         item->uid_next = uid_next;
4779                         if (uid_val != item->item.mtime) {
4780                                 item->item.mtime = uid_val;
4781                                 item->should_trash_cache = TRUE;
4782                         }
4783                         unlock_session(session);
4784                         return TRUE;
4785                 }
4786         }
4787         unlock_session(session);
4788
4789         item->should_update = FALSE;
4790         return FALSE;
4791 }
4792
4793 void imap_change_flags(Folder *folder, FolderItem *item, MsgInfo *msginfo, MsgPermFlags newflags)
4794 {
4795         IMAPSession *session;
4796         IMAPFlags flags_set = 0, flags_unset = 0;
4797         gint ok = MAILIMAP_NO_ERROR;
4798         MsgNumberList numlist;
4799         hashtable_data *ht_data = NULL;
4800
4801         g_return_if_fail(folder != NULL);
4802         g_return_if_fail(folder->klass == &imap_class);
4803         g_return_if_fail(item != NULL);
4804         g_return_if_fail(item->folder == folder);
4805         g_return_if_fail(msginfo != NULL);
4806         g_return_if_fail(msginfo->folder == item);
4807
4808         if (!MSG_IS_MARKED(msginfo->flags) &&  (newflags & MSG_MARKED))
4809                 flags_set |= IMAP_FLAG_FLAGGED;
4810         if ( MSG_IS_MARKED(msginfo->flags) && !(newflags & MSG_MARKED))
4811                 flags_unset |= IMAP_FLAG_FLAGGED;
4812
4813         if (!MSG_IS_UNREAD(msginfo->flags) &&  (newflags & MSG_UNREAD))
4814                 flags_unset |= IMAP_FLAG_SEEN;
4815         if ( MSG_IS_UNREAD(msginfo->flags) && !(newflags & MSG_UNREAD))
4816                 flags_set |= IMAP_FLAG_SEEN;
4817
4818         if (!MSG_IS_REPLIED(msginfo->flags) &&  (newflags & MSG_REPLIED))
4819                 flags_set |= IMAP_FLAG_ANSWERED;
4820         if ( MSG_IS_REPLIED(msginfo->flags) && !(newflags & MSG_REPLIED))
4821                 flags_unset |= IMAP_FLAG_ANSWERED;
4822
4823         if (!MSG_IS_FORWARDED(msginfo->flags) &&  (newflags & MSG_FORWARDED))
4824                 flags_set |= IMAP_FLAG_FORWARDED;
4825         if ( MSG_IS_FORWARDED(msginfo->flags) && !(newflags & MSG_FORWARDED))
4826                 flags_unset |= IMAP_FLAG_FORWARDED;
4827
4828         if (!MSG_IS_SPAM(msginfo->flags) &&  (newflags & MSG_SPAM)) {
4829                 flags_set |= IMAP_FLAG_SPAM;
4830                 flags_unset |= IMAP_FLAG_HAM;
4831         }
4832         if ( MSG_IS_SPAM(msginfo->flags) && !(newflags & MSG_SPAM)) {
4833                 flags_set |= IMAP_FLAG_HAM;
4834                 flags_unset |= IMAP_FLAG_SPAM;
4835         }
4836         if (!MSG_IS_DELETED(msginfo->flags) &&  (newflags & MSG_DELETED))
4837                 flags_set |= IMAP_FLAG_DELETED;
4838         if ( MSG_IS_DELETED(msginfo->flags) && !(newflags & MSG_DELETED))
4839                 flags_unset |= IMAP_FLAG_DELETED;
4840
4841         if (!flags_set && !flags_unset) {
4842                 /* the changed flags were not translatable to IMAP-speak.
4843                  * like MSG_POSTFILTERED, so just apply. */
4844                 msginfo->flags.perm_flags = newflags;
4845                 return;
4846         }
4847
4848         debug_print("getting session...\n");
4849         session = imap_session_get(folder);
4850         if (!session) {
4851                 return;
4852         }
4853
4854         if ((ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
4855             NULL, NULL, NULL, NULL, NULL, FALSE)) != MAILIMAP_NO_ERROR) {
4856                 return;
4857         }
4858         numlist.next = NULL;
4859         numlist.data = GINT_TO_POINTER(msginfo->msgnum);
4860
4861         if (IMAP_FOLDER_ITEM(item)->batching) {
4862                 /* instead of performing an UID STORE command for each message change,
4863                  * as a lot of them can change "together", we just fill in hashtables
4864                  * and defer the treatment so that we're able to send only one
4865                  * command.
4866                  */
4867                 debug_print("IMAP batch mode on, deferring flags change\n");
4868                 if (flags_set) {
4869                         ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->flags_set_table,
4870                                 GINT_TO_POINTER(flags_set));
4871                         if (ht_data == NULL) {
4872                                 ht_data = g_new0(hashtable_data, 1);
4873                                 ht_data->item = IMAP_FOLDER_ITEM(item);
4874                                 g_hash_table_insert(IMAP_FOLDER_ITEM(item)->flags_set_table,
4875                                         GINT_TO_POINTER(flags_set), ht_data);
4876                         }
4877                         ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
4878                 }
4879                 if (flags_unset) {
4880                         ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->flags_unset_table,
4881                                 GINT_TO_POINTER(flags_unset));
4882                         if (ht_data == NULL) {
4883                                 ht_data = g_new0(hashtable_data, 1);
4884                                 ht_data->item = IMAP_FOLDER_ITEM(item);
4885                                 g_hash_table_insert(IMAP_FOLDER_ITEM(item)->flags_unset_table,
4886                                         GINT_TO_POINTER(flags_unset), ht_data);
4887                         }
4888                         ht_data->msglist = g_slist_prepend(ht_data->msglist,
4889                                         GINT_TO_POINTER(msginfo->msgnum));
4890                 }
4891         } else {
4892                 debug_print("IMAP changing flags\n");
4893                 if (flags_set) {
4894                         ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item), &numlist, flags_set, NULL, TRUE);
4895                         if (ok != MAILIMAP_NO_ERROR) {
4896                                 return;
4897                         }
4898                 }
4899
4900                 if (flags_unset) {
4901                         ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item), &numlist, flags_unset, NULL, FALSE);
4902                         if (ok != MAILIMAP_NO_ERROR) {
4903                                 return;
4904                         }
4905                 }
4906         }
4907         msginfo->flags.perm_flags = newflags;
4908         return;
4909 }
4910
4911 static gint imap_remove_msg(Folder *folder, FolderItem *item, gint uid)
4912 {
4913         gint ok;
4914         IMAPSession *session;
4915         gchar *dir;
4916         MsgNumberList numlist;
4917
4918         g_return_val_if_fail(folder != NULL, -1);
4919         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
4920         g_return_val_if_fail(item != NULL, -1);
4921
4922         debug_print("getting session...\n");
4923         session = imap_session_get(folder);
4924         if (!session) return -1;
4925
4926         ok = imap_select(session, IMAP_FOLDER(folder), item,
4927                          NULL, NULL, NULL, NULL, NULL, FALSE);
4928         if (ok != MAILIMAP_NO_ERROR) {
4929                 return ok;
4930         }
4931         numlist.next = NULL;
4932         numlist.data = GINT_TO_POINTER(uid);
4933
4934         ok = imap_set_message_flags
4935                 (session, IMAP_FOLDER_ITEM(item), &numlist, IMAP_FLAG_DELETED, NULL, TRUE);
4936         if (ok != MAILIMAP_NO_ERROR) {
4937                 log_warning(LOG_PROTOCOL, _("can't set deleted flags: %d\n"), uid);
4938                 return ok;
4939         }
4940
4941         ok = imap_cmd_expunge(session, folder->account->imap_use_trash);
4942
4943         if (ok != MAILIMAP_NO_ERROR) {
4944                 log_warning(LOG_PROTOCOL, _("can't expunge\n"));
4945                 return ok;
4946         }
4947
4948         IMAP_FOLDER_ITEM(item)->uid_list = g_slist_remove(
4949             IMAP_FOLDER_ITEM(item)->uid_list, numlist.data);
4950         dir = folder_item_get_path(item);
4951         if (is_dir_exist(dir))
4952                 remove_numbered_files(dir, uid, uid);
4953         g_free(dir);
4954         return MAILIMAP_NO_ERROR;
4955 }
4956
4957 static gint compare_msginfo(gconstpointer a, gconstpointer b)
4958 {
4959         return ((MsgInfo *)a)->msgnum - ((MsgInfo *)b)->msgnum;
4960 }
4961
4962 static guint gslist_find_next_num(MsgNumberList **list, guint num)
4963 {
4964         GSList *elem;
4965
4966         g_return_val_if_fail(list != NULL, -1);
4967
4968         for (elem = *list; elem != NULL; elem = g_slist_next(elem))
4969                 if (GPOINTER_TO_INT(elem->data) >= num)
4970                         break;
4971         *list = elem;
4972         return elem != NULL ? GPOINTER_TO_INT(elem->data) : (gint)-1;
4973 }
4974
4975 static gboolean flag_ok(IMAPFolderItem *item, guint flag)
4976 {
4977         if (item->ok_flags && g_slist_find(item->ok_flags, GUINT_TO_POINTER(flag))) {
4978                 debug_print("flag %d is OK\n", flag);
4979                 return TRUE;
4980         }
4981         if (item->can_create_flags == ITEM_CAN_CREATE_FLAGS) {
4982                 debug_print("creating flags is OK\n");
4983                 return TRUE;
4984         }
4985         return FALSE;
4986 }
4987
4988 /*
4989  * NEW and DELETED flags are not syncronized
4990  * - The NEW/RECENT flags in IMAP folders can not really be directly
4991  *   modified by Sylpheed
4992  * - The DELETE/DELETED flag in IMAP and Sylpheed don't have the same
4993  *   meaning, in IMAP it always removes the messages from the FolderItem
4994  *   in Sylpheed it can mean to move the message to trash
4995  */
4996
4997 typedef struct _get_flags_data {
4998         Folder *folder;
4999         FolderItem *item;
5000         MsgInfoList *msginfo_list;
5001         GHashTable *msgflags;
5002         gboolean full_search;
5003         gboolean done;
5004 } get_flags_data;
5005
5006 static /*gint*/ void *imap_get_flags_thread(void *data)
5007 {
5008         get_flags_data *stuff = (get_flags_data *)data;
5009         Folder *folder = stuff->folder;
5010         FolderItem *fitem = (FolderItem *) stuff->item;
5011         MsgInfoList *msginfo_list = stuff->msginfo_list;
5012         GHashTable *msgflags = stuff->msgflags;
5013         GSList *elem;
5014         carray * lep_uidtab;
5015         IMAPSession *session;
5016         gint ok;
5017         int r = MAILIMAP_NO_ERROR;
5018         GHashTable *flags_hash = NULL;
5019         GHashTable *tags_hash = NULL;
5020         gboolean full_search = stuff->full_search;
5021         GSList *sorted_list = NULL;
5022         GSList *unseen = NULL, *answered = NULL, *flagged = NULL, *deleted = NULL, *forwarded = NULL, *spam = NULL;
5023         GSList *seq_list, *cur;
5024         gboolean reverse_seen = FALSE;
5025         gboolean selected_folder;
5026         gint exists_cnt, unseen_cnt;
5027         gboolean got_alien_tags = FALSE;
5028
5029         session = imap_session_get(folder);
5030
5031         if (session == NULL) {
5032                 stuff->done = TRUE;
5033                 return GINT_TO_POINTER(-1);
5034         }
5035         selected_folder = (session->mbox != NULL) &&
5036                           (!strcmp(session->mbox, fitem->path));
5037
5038         lock_session(session);
5039         if (!selected_folder) {
5040                 ok = imap_select(session, IMAP_FOLDER(folder), fitem,
5041                         &exists_cnt, NULL, &unseen_cnt, NULL, NULL, TRUE);
5042                 if (ok != MAILIMAP_NO_ERROR) {
5043                         stuff->done = TRUE;
5044                         return GINT_TO_POINTER(-1);
5045                 }
5046
5047                 if (unseen_cnt > exists_cnt / 2)
5048                         reverse_seen = TRUE;
5049         }
5050         else {
5051                 if (fitem->unread_msgs > fitem->total_msgs / 2)
5052                         reverse_seen = TRUE;
5053         }
5054
5055         sorted_list = g_slist_sort(g_slist_copy(msginfo_list), compare_msginfo);
5056         if (!full_search) {
5057                 seq_list = imap_get_lep_set_from_msglist(IMAP_FOLDER(folder), msginfo_list);
5058         } else {
5059                 struct mailimap_set * set;
5060                 set = mailimap_set_new_interval(1, 0);
5061                 seq_list = g_slist_append(NULL, set);
5062         }
5063
5064         if (folder->account && folder->account->low_bandwidth) {
5065                 for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
5066                         struct mailimap_set * imapset;
5067                         clist * lep_uidlist;
5068                         int r;
5069
5070                         imapset = cur->data;
5071                         if (reverse_seen) {
5072                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SEEN, NULL,
5073                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5074                         }
5075                         else {
5076                                 r = imap_threaded_search(folder,
5077                                                          IMAP_SEARCH_TYPE_UNSEEN, NULL,
5078                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5079                         }
5080                         if (r == MAILIMAP_NO_ERROR) {
5081                                 GSList * uidlist;
5082
5083                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5084                                 mailimap_search_result_free(lep_uidlist);
5085
5086                                 unseen = g_slist_concat(unseen, uidlist);
5087                         } else {
5088                                 imap_handle_error(SESSION(session), NULL, r);
5089                                 goto bail;
5090                         }
5091
5092                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_FLAGGED, NULL,
5093                                                  NULL, full_search ? NULL:imapset, &lep_uidlist);
5094                         if (r == MAILIMAP_NO_ERROR) {
5095                                 GSList * uidlist;
5096
5097                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5098                                 mailimap_search_result_free(lep_uidlist);
5099
5100                                 flagged = g_slist_concat(flagged, uidlist);
5101                         } else {
5102                                 imap_handle_error(SESSION(session), NULL, r);
5103                                 goto bail;
5104                         }
5105
5106                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
5107                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_ANSWERED, NULL,
5108                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5109                                 if (r == MAILIMAP_NO_ERROR) {
5110                                         GSList * uidlist;
5111
5112                                         uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5113                                         mailimap_search_result_free(lep_uidlist);
5114
5115                                         answered = g_slist_concat(answered, uidlist);
5116                                 } else {
5117                                         imap_handle_error(SESSION(session), NULL, r);
5118                                         goto bail;
5119                                 }
5120
5121                                 if (flag_ok(IMAP_FOLDER_ITEM(fitem), IMAP_FLAG_FORWARDED)) {
5122                                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_FORWARDED, NULL,
5123                                                                  NULL, full_search ? NULL:imapset, &lep_uidlist);
5124                                         if (r == MAILIMAP_NO_ERROR) {
5125                                                 GSList * uidlist;
5126
5127                                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5128                                                 mailimap_search_result_free(lep_uidlist);
5129
5130                                                 forwarded = g_slist_concat(forwarded, uidlist);
5131                                         } else {
5132                                                 imap_handle_error(SESSION(session), NULL, r);
5133                                                 goto bail;
5134                                         }
5135                                 }
5136
5137                                 if (flag_ok(IMAP_FOLDER_ITEM(fitem), IMAP_FLAG_SPAM)) {
5138                                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SPAM, NULL,
5139                                                                  NULL, full_search ? NULL:imapset, &lep_uidlist);
5140                                         if (r == MAILIMAP_NO_ERROR) {
5141                                                 GSList * uidlist;
5142
5143                                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5144                                                 mailimap_search_result_free(lep_uidlist);
5145
5146                                                 spam = g_slist_concat(spam, uidlist);
5147                                         } else {
5148                                                 imap_handle_error(SESSION(session), NULL, r);
5149                                                 goto bail;
5150                                         }
5151                                 }
5152
5153                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_DELETED, NULL,
5154                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5155                                 if (r == MAILIMAP_NO_ERROR) {
5156                                         GSList * uidlist;
5157
5158                                         uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5159                                         mailimap_search_result_free(lep_uidlist);
5160
5161                                         deleted = g_slist_concat(deleted, uidlist);
5162                                 } else {
5163                                         imap_handle_error(SESSION(session), NULL, r);
5164                                         goto bail;
5165                                 }
5166                         }
5167                 }
5168
5169         } else {
5170                 r = imap_threaded_fetch_uid_flags(folder, 1, &lep_uidtab);
5171                 if (r == MAILIMAP_NO_ERROR) {
5172                         flags_hash = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, NULL);
5173                         tags_hash = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, NULL);
5174                         imap_flags_hash_from_lep_uid_flags_tab(lep_uidtab, flags_hash, tags_hash);
5175                         imap_fetch_uid_flags_list_free(lep_uidtab);
5176                 } else {
5177                         imap_handle_error(SESSION(session), NULL, r);
5178                         goto bail;
5179                 }
5180         }
5181
5182 bail:
5183         if (r == MAILIMAP_NO_ERROR)
5184                 unlock_session(session);
5185
5186         for (elem = sorted_list; elem != NULL; elem = g_slist_next(elem)) {
5187                 MsgInfo *msginfo;
5188                 MsgPermFlags flags, oldflags;
5189                 gboolean wasnew;
5190
5191                 msginfo = (MsgInfo *) elem->data;
5192                 flags = msginfo->flags.perm_flags;
5193                 wasnew = (flags & MSG_NEW);
5194                 oldflags = flags & ~(MSG_NEW|MSG_UNREAD|MSG_REPLIED|MSG_FORWARDED|MSG_MARKED|MSG_DELETED|MSG_SPAM);
5195
5196                 if (folder->account && folder->account->low_bandwidth) {
5197                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
5198                                 flags &= ~((reverse_seen ? 0 : MSG_UNREAD | MSG_NEW) | MSG_REPLIED | MSG_FORWARDED | MSG_MARKED | MSG_SPAM);
5199                         } else {
5200                                 flags &= ~((reverse_seen ? 0 : MSG_UNREAD | MSG_NEW | MSG_MARKED));
5201                         }
5202                         if (reverse_seen)
5203                                 flags |= MSG_UNREAD | (wasnew ? MSG_NEW : 0);
5204                         if (gslist_find_next_num(&unseen, msginfo->msgnum) == msginfo->msgnum) {
5205                                 if (!reverse_seen) {
5206                                         flags |= MSG_UNREAD | (wasnew ? MSG_NEW : 0);
5207                                 } else {
5208                                         flags &= ~(MSG_UNREAD | MSG_NEW);
5209                                 }
5210                         }
5211
5212                         if (gslist_find_next_num(&flagged, msginfo->msgnum) == msginfo->msgnum)
5213                                 flags |= MSG_MARKED;
5214                         else
5215                                 flags &= ~MSG_MARKED;
5216
5217                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
5218                                 if (gslist_find_next_num(&answered, msginfo->msgnum) == msginfo->msgnum)
5219                                         flags |= MSG_REPLIED;
5220                                 else
5221                                         flags &= ~MSG_REPLIED;
5222                                 if (gslist_find_next_num(&forwarded, msginfo->msgnum) == msginfo->msgnum)
5223                                         flags |= MSG_FORWARDED;
5224                                 else
5225                                         flags &= ~MSG_FORWARDED;
5226                                 if (gslist_find_next_num(&spam, msginfo->msgnum) == msginfo->msgnum)
5227                                         flags |= MSG_SPAM;
5228                                 else
5229                                         flags &= ~MSG_SPAM;
5230                                 if (gslist_find_next_num(&deleted, msginfo->msgnum) == msginfo->msgnum)
5231                                         flags |= MSG_DELETED;
5232                                 else
5233                                         flags &= ~MSG_DELETED;
5234                         }
5235                 } else {
5236                         if (flags_hash != NULL) {
5237
5238                                 flags = GPOINTER_TO_INT(g_hash_table_lookup(flags_hash,
5239                                                 GINT_TO_POINTER(msginfo->msgnum)));
5240                         }
5241
5242                         if ((flags & MSG_UNREAD) == 0)
5243                                 flags &= ~MSG_NEW;
5244                         else if (wasnew)
5245                                 flags |= MSG_NEW;
5246                         flags |= oldflags;
5247
5248                         if (tags_hash != NULL) {
5249                                 GSList *tags = g_hash_table_lookup(tags_hash, GINT_TO_POINTER(msginfo->msgnum));
5250                                 GSList *cur;
5251
5252                                 g_slist_free(msginfo->tags);
5253                                 msginfo->tags = NULL;
5254
5255                                 for (cur = tags; cur; cur = cur->next) {
5256                                         gchar *real_tag = imap_modified_utf7_to_utf8(cur->data, TRUE);
5257                                         gint id = 0;
5258                                         id = tags_get_id_for_str(real_tag);
5259                                         if (id == -1) {
5260                                                 id = tags_add_tag(real_tag);
5261                                                 got_alien_tags = TRUE;
5262                                         }
5263                                         msginfo->tags = g_slist_append(
5264                                                                 msginfo->tags,
5265                                                                 GINT_TO_POINTER(id));
5266                                         g_free(real_tag);
5267                                 }
5268                                 slist_free_strings_full(tags);
5269                         }
5270                 }
5271
5272                 g_hash_table_insert(msgflags, msginfo, GINT_TO_POINTER(flags));
5273         }
5274
5275         if (got_alien_tags) {
5276                 tags_write_tags();
5277                 main_window_reflect_tags_changes(mainwindow_get_mainwindow());
5278         }
5279
5280         if (flags_hash)
5281                 g_hash_table_destroy(flags_hash);
5282         if (tags_hash)
5283                 g_hash_table_destroy(tags_hash);
5284
5285         imap_lep_set_free(seq_list);
5286         g_slist_free(flagged);
5287         g_slist_free(deleted);
5288         g_slist_free(answered);
5289         g_slist_free(forwarded);
5290         g_slist_free(spam);
5291         g_slist_free(unseen);
5292         g_slist_free(sorted_list);
5293
5294         stuff->done = TRUE;
5295         return GINT_TO_POINTER(0);
5296 }
5297
5298 static gint imap_get_flags(Folder *folder, FolderItem *item,
5299                            MsgInfoList *msginfo_list, GHashTable *msgflags)
5300 {
5301         gint result;
5302         get_flags_data *data = g_new0(get_flags_data, 1);
5303         data->done = FALSE;
5304         data->folder = folder;
5305         data->item = item;
5306         data->msginfo_list = msginfo_list;
5307         data->msgflags = msgflags;
5308         data->full_search = FALSE;
5309
5310         GSList *tmp = NULL, *cur;
5311
5312         if (prefs_common.work_offline &&
5313             !inc_offline_should_override(FALSE,
5314                 _("Claws Mail needs network access in order "
5315                   "to access the IMAP server."))) {
5316                 g_free(data);
5317                 return -1;
5318         }
5319
5320         tmp = folder_item_get_msg_list(item);
5321
5322         if (g_slist_length(tmp) <= g_slist_length(msginfo_list))
5323                 data->full_search = TRUE;
5324
5325         for (cur = tmp; cur; cur = cur->next)
5326                 procmsg_msginfo_free((MsgInfo *)cur->data);
5327
5328         g_slist_free(tmp);
5329
5330         result = GPOINTER_TO_INT(imap_get_flags_thread(data));
5331
5332         g_free(data);
5333         return result;
5334
5335 }
5336
5337 static gboolean process_flags(gpointer key, gpointer value, gpointer user_data)
5338 {
5339         gboolean flags_set = GPOINTER_TO_INT(user_data);
5340         gint flags_value = GPOINTER_TO_INT(key);
5341         hashtable_data *data = (hashtable_data *)value;
5342         IMAPFolderItem *_item = data->item;
5343         FolderItem *item = (FolderItem *)_item;
5344         gint ok = MAILIMAP_ERROR_BAD_STATE;
5345         IMAPSession *session = NULL;
5346
5347         debug_print("getting session...\n");
5348         session = imap_session_get(item->folder);
5349
5350         data->msglist = g_slist_reverse(data->msglist);
5351
5352         debug_print("IMAP %ssetting flags to %d for %d messages\n",
5353                 flags_set?"":"un",
5354                 flags_value,
5355                 g_slist_length(data->msglist));
5356
5357         lock_session(session);
5358         if (session) {
5359                 ok = imap_select(session, IMAP_FOLDER(item->folder), item,
5360                          NULL, NULL, NULL, NULL, NULL, FALSE);
5361         }
5362         if (ok == MAILIMAP_NO_ERROR) {
5363                 ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item),
5364                         data->msglist, flags_value, NULL, flags_set);
5365         } else {
5366                 g_warning("can't select mailbox %s\n", item->path);
5367         }
5368
5369         if (!is_fatal(ok))
5370                 unlock_session(session);
5371
5372         g_slist_free(data->msglist);
5373         g_free(data);
5374         return TRUE;
5375 }
5376
5377 static gboolean process_tags(gpointer key, gpointer value, gpointer user_data)
5378 {
5379         gboolean tags_set = GPOINTER_TO_INT(user_data);
5380         TagsData *data = (TagsData *)value;
5381         IMAPFolderItem *_item = data->item;
5382         FolderItem *item = (FolderItem *)_item;
5383         gchar *str = data->str;
5384         gint ok = MAILIMAP_ERROR_BAD_STATE;
5385         IMAPSession *session = NULL;
5386
5387         debug_print("getting session...\n");
5388         session = imap_session_get(item->folder);
5389
5390         data->msglist = g_slist_reverse(data->msglist);
5391
5392         debug_print("IMAP %ssetting tags %s for %d messages\n",
5393                 tags_set?"":"un",
5394                 str,
5395                 g_slist_length(data->msglist));
5396
5397         lock_session(session);
5398         if (session) {
5399                 ok = imap_select(session, IMAP_FOLDER(item->folder), item,
5400                          NULL, NULL, NULL, NULL, NULL, FALSE);
5401         }
5402         if (ok == MAILIMAP_NO_ERROR) {
5403                 GSList list;
5404                 list.data = str;
5405                 list.next = NULL;
5406                 ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item),
5407                         data->msglist, 0, &list, tags_set);
5408         } else {
5409                 g_warning("can't select mailbox %s\n", item->path);
5410         }
5411
5412         if (!is_fatal(ok))
5413                 unlock_session(session);
5414
5415         g_slist_free(data->msglist);
5416         g_free(data->str);
5417         g_free(data);
5418         return TRUE;
5419 }
5420
5421 static void process_hashtable(IMAPFolderItem *item)
5422 {
5423         if (item->flags_set_table) {
5424                 g_hash_table_foreach_remove(item->flags_set_table, process_flags, GINT_TO_POINTER(TRUE));
5425                 g_hash_table_destroy(item->flags_set_table);
5426                 item->flags_set_table = NULL;
5427         }
5428         if (item->flags_unset_table) {
5429                 g_hash_table_foreach_remove(item->flags_unset_table, process_flags, GINT_TO_POINTER(FALSE));
5430                 g_hash_table_destroy(item->flags_unset_table);
5431                 item->flags_unset_table = NULL;
5432         }
5433         if (item->tags_set_table) {
5434                 g_hash_table_foreach_remove(item->tags_set_table, process_tags, GINT_TO_POINTER(TRUE));
5435                 g_hash_table_destroy(item->tags_set_table);
5436                 item->tags_set_table = NULL;
5437         }
5438         if (item->tags_unset_table) {
5439                 g_hash_table_foreach_remove(item->tags_unset_table, process_tags, GINT_TO_POINTER(FALSE));
5440                 g_hash_table_destroy(item->tags_unset_table);
5441                 item->tags_unset_table = NULL;
5442         }
5443
5444 }
5445
5446 static void imap_set_batch (Folder *folder, FolderItem *_item, gboolean batch)
5447 {
5448         IMAPFolderItem *item = (IMAPFolderItem *)_item;
5449         IMAPSession *session;
5450
5451         g_return_if_fail(item != NULL);
5452
5453         if (item->batching == batch)
5454                 return;
5455
5456         if (batch) {
5457                 item->batching = TRUE;
5458                 debug_print("IMAP switching to batch mode\n");
5459                 if (!item->flags_set_table) {
5460                         item->flags_set_table = g_hash_table_new(NULL, g_direct_equal);
5461                 }
5462                 if (!item->flags_unset_table) {
5463                         item->flags_unset_table = g_hash_table_new(NULL, g_direct_equal);
5464                 }
5465                 if (!item->tags_set_table) {
5466                         item->tags_set_table = g_hash_table_new(NULL, g_direct_equal);
5467                 }
5468                 if (!item->tags_unset_table) {
5469                         item->tags_unset_table = g_hash_table_new(NULL, g_direct_equal);
5470                 }
5471                 session = imap_session_get(folder);
5472                 if (session) {
5473                         imap_refresh_sensitivity(session);
5474                         session->sens_update_block = TRUE;
5475                 }
5476         } else {
5477                 debug_print("IMAP switching away from batch mode\n");
5478                 /* process stuff */
5479                 process_hashtable(item);
5480                 item->batching = FALSE;
5481                 session = imap_session_get(folder);
5482                 if (session) {
5483                         session->sens_update_block = FALSE;
5484                         imap_refresh_sensitivity(session);
5485                 }
5486         }
5487 }
5488
5489
5490
5491 /* data types conversion libetpan <-> claws */
5492
5493
5494
5495 #define ETPAN_IMAP_MB_MARKED      1
5496 #define ETPAN_IMAP_MB_UNMARKED    2
5497 #define ETPAN_IMAP_MB_NOSELECT    4
5498 #define ETPAN_IMAP_MB_NOINFERIORS 8
5499
5500 static int imap_flags_to_flags(struct mailimap_mbx_list_flags * imap_flags)
5501 {
5502   int flags;
5503   clistiter * cur;
5504
5505   flags = 0;
5506   if (imap_flags->mbf_type == MAILIMAP_MBX_LIST_FLAGS_SFLAG) {
5507     switch (imap_flags->mbf_sflag) {
5508     case MAILIMAP_MBX_LIST_SFLAG_MARKED:
5509       flags |= ETPAN_IMAP_MB_MARKED;
5510       break;
5511     case MAILIMAP_MBX_LIST_SFLAG_NOSELECT:
5512       flags |= ETPAN_IMAP_MB_NOSELECT;
5513       break;
5514     case MAILIMAP_MBX_LIST_SFLAG_UNMARKED:
5515       flags |= ETPAN_IMAP_MB_UNMARKED;
5516       break;
5517     }
5518   }
5519
5520   if (imap_flags->mbf_oflags) {
5521     for(cur = clist_begin(imap_flags->mbf_oflags) ; cur != NULL ;
5522         cur = clist_next(cur)) {
5523       struct mailimap_mbx_list_oflag * oflag;
5524
5525       oflag = clist_content(cur);
5526
5527       switch (oflag->of_type) {
5528       case MAILIMAP_MBX_LIST_OFLAG_NOINFERIORS:
5529         flags |= ETPAN_IMAP_MB_NOINFERIORS;
5530         break;
5531       }
5532     }
5533   }
5534   return flags;
5535 }
5536
5537 static GSList * imap_list_from_lep(IMAPFolder * folder,
5538                                    clist * list, const gchar * real_path, gboolean all)
5539 {
5540         clistiter * iter;
5541         GSList * item_list = NULL, *llast = NULL;
5542
5543         if (list) {
5544                 for(iter = clist_begin(list) ; iter != NULL ;
5545                     iter = clist_next(iter)) {
5546                         struct mailimap_mailbox_list * mb;
5547                         int flags;
5548                         char delimiter;
5549                         char * name;
5550                         char * dup_name;
5551                         gchar * base;
5552                         gchar * loc_name;
5553                         gchar * loc_path;
5554                         FolderItem *new_item;
5555
5556                         mb = clist_content(iter);
5557
5558                         if (mb == NULL)
5559                                 continue;
5560
5561                         flags = 0;
5562                         if (mb->mb_flag != NULL)
5563                                 flags = imap_flags_to_flags(mb->mb_flag);
5564
5565                         delimiter = mb->mb_delimiter;
5566                         name = mb->mb_name;
5567
5568                         dup_name = strdup(name);
5569                         if (delimiter != '\0')
5570                                 subst_char(dup_name, delimiter, '/');
5571
5572                         base = g_path_get_basename(dup_name);
5573                         if (base[0] == '.') {
5574                                 g_free(base);
5575                                 free(dup_name);
5576                                 continue;
5577                         }
5578                         if (!all && path_cmp(name, real_path) == 0) {
5579                                 g_free(base);
5580                                 free(dup_name);
5581                                 continue;
5582                         }
5583
5584                         if (!all && dup_name[strlen(dup_name)-1] == '/') {
5585                                 dup_name[strlen(dup_name)-1] = '\0';
5586                         }
5587
5588                         loc_name = imap_modified_utf7_to_utf8(base, FALSE);
5589                         loc_path = imap_modified_utf7_to_utf8(dup_name, FALSE);
5590
5591                         new_item = folder_item_new(FOLDER(folder), loc_name, loc_path);
5592                         if ((flags & ETPAN_IMAP_MB_NOINFERIORS) != 0)
5593                                 new_item->no_sub = TRUE;
5594                         if (strcmp(dup_name, "INBOX") != 0 &&
5595                             ((flags & ETPAN_IMAP_MB_NOSELECT) != 0))
5596                                 new_item->no_select = TRUE;
5597
5598                         if (item_list == NULL)
5599                                 llast = item_list = g_slist_append(item_list, new_item);
5600                         else {
5601                                 llast = g_slist_append(llast, new_item);
5602                                 llast = llast->next;
5603                         }
5604                         debug_print("folder '%s' found.\n", loc_path);
5605                         g_free(base);
5606                         g_free(loc_path);
5607                         g_free(loc_name);
5608
5609                         free(dup_name);
5610                 }
5611         }
5612         return item_list;
5613 }
5614
5615 static GSList * imap_get_lep_set_from_numlist(IMAPFolder *folder, MsgNumberList *numlist)
5616 {
5617         GSList *sorted_list, *cur;
5618         guint first, last, next;
5619         GSList *ret_list = NULL, *llast = NULL;
5620         struct mailimap_set * current_set;
5621         unsigned int item_count;
5622
5623         if (numlist == NULL)
5624                 return NULL;
5625
5626         current_set = mailimap_set_new_empty();
5627
5628         sorted_list = g_slist_copy(numlist);
5629         sorted_list = g_slist_sort(sorted_list, g_int_compare);
5630
5631         first = GPOINTER_TO_INT(sorted_list->data);
5632
5633         item_count = 0;
5634         for (cur = sorted_list; cur != NULL; cur = g_slist_next(cur)) {
5635                 if (GPOINTER_TO_INT(cur->data) == 0)
5636                         continue;
5637
5638                 item_count ++;
5639
5640                 last = GPOINTER_TO_INT(cur->data);
5641                 if (cur->next)
5642                         next = GPOINTER_TO_INT(cur->next->data);
5643                 else
5644                         next = 0;
5645
5646                 if (last + 1 != next || next == 0 || item_count >= folder->max_set_size) {
5647
5648                         struct mailimap_set_item * item;
5649                         item = mailimap_set_item_new(first, last);
5650                         mailimap_set_add(current_set, item);
5651
5652                         first = next;
5653
5654                         if (item_count >= folder->max_set_size) {
5655                                 if (ret_list == NULL)
5656                                         llast = ret_list = g_slist_append(ret_list,
5657                                                           current_set);
5658                                 else {
5659                                         llast = g_slist_append(llast, current_set);
5660                                         llast = llast->next;
5661                                 }
5662
5663                                 current_set = mailimap_set_new_empty();
5664                                 item_count = 0;
5665                         }
5666                 }
5667         }
5668
5669         if (clist_count(current_set->set_list) > 0) {
5670                 ret_list = g_slist_append(ret_list,
5671                                           current_set);
5672         }
5673
5674         g_slist_free(sorted_list);
5675
5676         return ret_list;
5677 }
5678
5679 static GSList * imap_get_lep_set_from_msglist(IMAPFolder *folder, MsgInfoList *msglist)
5680 {
5681         MsgNumberList *numlist = NULL;
5682         GSList *seq_list;
5683
5684         numlist = procmsg_get_number_list_for_msgs(msglist);
5685
5686         seq_list = imap_get_lep_set_from_numlist(folder, numlist);
5687         g_slist_free(numlist);
5688
5689         return seq_list;
5690 }
5691
5692 static GSList * imap_uid_list_from_lep(clist * list, gint* length)
5693 {
5694         clistiter * iter;
5695         GSList * result;
5696         gint len = 0;
5697
5698         result = NULL;
5699
5700         if (list) {
5701                 for(iter = clist_begin(list) ; iter != NULL ;
5702                     iter = clist_next(iter)) {
5703                         uint32_t * puid;
5704
5705                         puid = clist_content(iter);
5706                         result = g_slist_prepend(result, GINT_TO_POINTER(* puid));
5707                         len++;
5708                 }
5709                 result = g_slist_reverse(result);
5710         }
5711         if (length)
5712                 *length = len;
5713         return result;
5714 }
5715
5716 static GSList * imap_uid_list_from_lep_tab(carray * list)
5717 {
5718         unsigned int i;
5719         GSList * result;
5720
5721         result = NULL;
5722
5723         for(i = 0 ; i < carray_count(list) ; i ++) {
5724                 uint32_t * puid;
5725
5726                 puid = carray_get(list, i);
5727                 result = g_slist_prepend(result, GINT_TO_POINTER(* puid));
5728         }
5729         result = g_slist_reverse(result);
5730         return result;
5731 }
5732
5733 static void imap_flags_hash_from_lep_uid_flags_tab(carray * list,
5734                                                    GHashTable * hash,
5735                                                    GHashTable * tags_hash)
5736 {
5737         unsigned int i;
5738
5739         for(i = 0 ; i < carray_count(list) ; i += 3) {
5740                 uint32_t * puid;
5741                 int * pflags;
5742                 GSList *tags;
5743
5744                 puid = carray_get(list, i);
5745                 pflags = carray_get(list, i + 1);
5746                 tags = carray_get(list, i + 2);
5747
5748                 g_hash_table_insert(hash, GINT_TO_POINTER(*puid), GINT_TO_POINTER(* pflags));
5749                 g_hash_table_insert(tags_hash, GINT_TO_POINTER(*puid), tags);
5750         }
5751 }
5752
5753 static MsgInfo *imap_envelope_from_lep(struct imap_fetch_env_info * info,
5754                                        FolderItem *item)
5755 {
5756         MsgInfo *msginfo = NULL;
5757         guint32 uid = 0;
5758         goffset size = 0;
5759         MsgFlags flags = {0, 0};
5760
5761         if (info->headers == NULL)
5762                 return NULL;
5763
5764         MSG_SET_TMP_FLAGS(flags, MSG_IMAP);
5765         if (folder_has_parent_of_type(item, F_QUEUE)) {
5766                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
5767         } else if (folder_has_parent_of_type(item, F_DRAFT)) {
5768                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
5769         }
5770         flags.perm_flags = info->flags;
5771
5772         uid = info->uid;
5773         size = (goffset) info->size;
5774         msginfo = procheader_parse_str(info->headers, flags, FALSE, FALSE);
5775
5776         if (msginfo) {
5777                 msginfo->msgnum = uid;
5778                 msginfo->size = size;
5779         }
5780
5781         return msginfo;
5782 }
5783
5784 static void imap_lep_set_free(GSList *seq_list)
5785 {
5786         GSList * cur;
5787
5788         for(cur = seq_list ; cur != NULL ; cur = g_slist_next(cur)) {
5789                 struct mailimap_set * imapset;
5790
5791                 imapset = cur->data;
5792                 mailimap_set_free(imapset);
5793         }
5794         g_slist_free(seq_list);
5795 }
5796
5797 static struct mailimap_flag_list * imap_flag_to_lep(IMAPFolderItem *item, IMAPFlags flags, GSList *tags)
5798 {
5799         struct mailimap_flag_list * flag_list;
5800         GSList *cur = tags;
5801
5802         flag_list = mailimap_flag_list_new_empty();
5803
5804         if (IMAP_IS_SEEN(flags))
5805                 mailimap_flag_list_add(flag_list,
5806                                        mailimap_flag_new_seen());
5807         if (IMAP_IS_ANSWERED(flags))
5808                 mailimap_flag_list_add(flag_list,
5809                                        mailimap_flag_new_answered());
5810         if (IMAP_IS_FLAGGED(flags))
5811                 mailimap_flag_list_add(flag_list,
5812                                        mailimap_flag_new_flagged());
5813         if (IMAP_IS_DELETED(flags))
5814                 mailimap_flag_list_add(flag_list,
5815                                        mailimap_flag_new_deleted());
5816         if (IMAP_IS_DRAFT(flags))
5817                 mailimap_flag_list_add(flag_list,
5818                                        mailimap_flag_new_draft());
5819         if (IMAP_IS_FORWARDED(flags) && flag_ok(item, IMAP_FLAG_FORWARDED))
5820                 mailimap_flag_list_add(flag_list,
5821                                        mailimap_flag_new_flag_keyword(strdup(RTAG_FORWARDED)));
5822         if (IMAP_IS_SPAM(flags) && flag_ok(item, IMAP_FLAG_SPAM))
5823                 mailimap_flag_list_add(flag_list,
5824                                        mailimap_flag_new_flag_keyword(strdup(RTAG_JUNK)));
5825         else if (IMAP_IS_HAM(flags) && flag_ok(item, IMAP_FLAG_HAM))
5826                 mailimap_flag_list_add(flag_list,
5827                                        mailimap_flag_new_flag_keyword(strdup(RTAG_NON_JUNK)));
5828
5829         for (; cur; cur = cur->next) {
5830                 gchar *enc_str =
5831                         imap_utf8_to_modified_utf7(cur->data, TRUE);
5832                 g_strstrip(enc_str);
5833
5834                 mailimap_flag_list_add(flag_list,
5835                         mailimap_flag_new_flag_keyword(enc_str));
5836         }
5837
5838         return flag_list;
5839 }
5840
5841 guint imap_folder_get_refcnt(Folder *folder)
5842 {
5843         return ((IMAPFolder *)folder)->refcnt;
5844 }
5845
5846 void imap_folder_ref(Folder *folder)
5847 {
5848         ((IMAPFolder *)folder)->refcnt++;
5849 }
5850
5851 void imap_disconnect_all(gboolean have_connectivity)
5852 {
5853         GList *list;
5854         gboolean short_timeout;
5855 #ifdef HAVE_NETWORKMANAGER_SUPPORT
5856         GError *error;
5857 #endif
5858
5859 #ifdef HAVE_NETWORKMANAGER_SUPPORT
5860         error = NULL;
5861         short_timeout = !networkmanager_is_online(&error);
5862         if(error) {
5863                 short_timeout = TRUE;
5864                 g_error_free(error);
5865         }
5866 #else
5867         short_timeout = TRUE;
5868 #endif
5869
5870         if(short_timeout)
5871                 imap_main_set_timeout(1);
5872
5873         for (list = account_get_list(); list != NULL; list = list->next) {
5874                 PrefsAccount *account = list->data;
5875                 if (account->protocol == A_IMAP4) {
5876                         RemoteFolder *folder = (RemoteFolder *)account->folder;
5877                         if (folder && folder->session) {
5878                                 if (imap_is_busy(FOLDER(folder)))
5879                                         imap_threaded_cancel(FOLDER(folder));
5880
5881                                 IMAPSession *session = (IMAPSession *)folder->session;
5882                                 if (have_connectivity)
5883                                         imap_threaded_disconnect(FOLDER(folder));
5884                                 SESSION(session)->state = SESSION_DISCONNECTED;
5885                                 SESSION(session)->sock = NULL;
5886                                 imap_safe_destroy(session);
5887                                 folder->session = NULL;
5888                         }
5889                 }
5890         }
5891
5892         if(short_timeout)
5893                 imap_main_set_timeout(prefs_common.io_timeout_secs);
5894 }
5895
5896 void imap_folder_unref(Folder *folder)
5897 {
5898         if (((IMAPFolder *)folder)->refcnt > 0)
5899                 ((IMAPFolder *)folder)->refcnt--;
5900 }
5901
5902 void imap_cancel_all(void)
5903 {
5904         GList *folderlist;
5905         GList *cur;
5906
5907         folderlist = folder_get_list();
5908         for (cur = folderlist; cur != NULL; cur = g_list_next(cur)) {
5909                 Folder *folder = (Folder *) cur->data;
5910
5911                 if (folder->klass == &imap_class) {
5912                         if (imap_is_busy(folder)) {
5913                                 IMAPSession *imap_session;
5914                                 RemoteFolder *rfolder;
5915
5916                                 g_printerr("cancelled\n");
5917                                 imap_threaded_cancel(folder);
5918                                 rfolder = (RemoteFolder *) folder;
5919                                 imap_session = (IMAPSession *) rfolder->session;
5920                                 if (imap_session)
5921                                         imap_session->cancelled = 1;
5922                         }
5923                 }
5924         }
5925 }
5926
5927 gboolean imap_cancel_all_enabled(void)
5928 {
5929         GList *folderlist;
5930         GList *cur;
5931
5932         folderlist = folder_get_list();
5933         for (cur = folderlist; cur != NULL; cur = g_list_next(cur)) {
5934                 Folder *folder = (Folder *) cur->data;
5935
5936                 if (folder->klass == &imap_class) {
5937                         if (imap_is_busy(folder)) {
5938                                 return TRUE;
5939                         }
5940                 }
5941         }
5942
5943         return FALSE;
5944 }
5945
5946 static gboolean imap_is_busy(Folder *folder)
5947 {
5948         IMAPSession *imap_session;
5949         RemoteFolder *rfolder;
5950
5951         rfolder = (RemoteFolder *) folder;
5952         imap_session = (IMAPSession *) rfolder->session;
5953         if (imap_session == NULL)
5954                 return FALSE;
5955
5956         return imap_session->busy;
5957 }
5958
5959 #else /* HAVE_LIBETPAN */
5960
5961 static FolderClass imap_class;
5962
5963 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item);
5964 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag);
5965
5966 static Folder   *imap_folder_new        (const gchar    *name,
5967                                          const gchar    *path)
5968 {
5969         static gboolean missing_imap_warning = TRUE;
5970         if (missing_imap_warning) {
5971                 missing_imap_warning = FALSE;
5972                 alertpanel_error(
5973                         _("You have one or more IMAP accounts "
5974                           "defined. However this version of "
5975                           "Claws Mail has been built without "
5976                           "IMAP support; your IMAP account(s) are "
5977                           "disabled.\n\n"
5978                           "You probably need to "
5979                           "install libetpan and recompile "
5980                           "Claws Mail."));
5981         }
5982         return NULL;
5983 }
5984 static gint     imap_create_tree        (Folder         *folder)
5985 {
5986         return -1;
5987 }
5988 static FolderItem *imap_create_folder   (Folder         *folder,
5989                                          FolderItem     *parent,
5990                                          const gchar    *name)
5991 {
5992         return NULL;
5993 }
5994 static gint     imap_rename_folder      (Folder         *folder,
5995                                          FolderItem     *item,
5996                                          const gchar    *name)
5997 {
5998         return -1;
5999 }
6000
6001 gchar imap_get_path_separator_for_item(FolderItem *item)
6002 {
6003         return '/';
6004 }
6005
6006 FolderClass *imap_get_class(void)
6007 {
6008         if (imap_class.idstr == NULL) {
6009                 imap_class.type = F_IMAP;
6010                 imap_class.idstr = "imap";
6011                 imap_class.uistr = "IMAP4";
6012
6013                 imap_class.new_folder = imap_folder_new;
6014                 imap_class.create_tree = imap_create_tree;
6015                 imap_class.create_folder = imap_create_folder;
6016                 imap_class.rename_folder = imap_rename_folder;
6017
6018                 imap_class.set_xml = folder_set_xml;
6019                 imap_class.get_xml = folder_get_xml;
6020                 imap_class.item_set_xml = imap_item_set_xml;
6021                 imap_class.item_get_xml = imap_item_get_xml;
6022                 /* nothing implemented */
6023         }
6024
6025         return &imap_class;
6026 }
6027
6028 void imap_disconnect_all(gboolean have_connectivity)
6029 {
6030 }
6031
6032 gint imap_subscribe(Folder *folder, FolderItem *item, gchar *rpath, gboolean sub)
6033 {
6034         return -1;
6035 }
6036
6037 GList * imap_scan_subtree(Folder *folder, FolderItem *item, gboolean unsubs_only, gboolean recursive)
6038 {
6039         return NULL;
6040 }
6041
6042 void imap_cache_msg(FolderItem *item, gint msgnum)
6043 {
6044 }
6045
6046 void imap_cancel_all(void)
6047 {
6048 }
6049
6050 gboolean imap_cancel_all_enabled(void)
6051 {
6052         return FALSE;
6053 }
6054
6055 #endif
6056
6057 #ifdef HAVE_LIBETPAN
6058 static void imap_synchronise(FolderItem *item, gint days)
6059 {
6060         if (IMAP_FOLDER_ITEM(item)->last_sync == IMAP_FOLDER_ITEM(item)->last_change) {
6061                 debug_print("%s already synced\n", item->path?item->path:item->name);
6062                 return;
6063         }
6064         debug_print("syncing %s\n", item->path?item->path:item->name);
6065         imap_gtk_synchronise(item, days);
6066         IMAP_FOLDER_ITEM(item)->last_sync = IMAP_FOLDER_ITEM(item)->last_change;
6067 }
6068 #endif
6069
6070 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag)
6071 {
6072 #ifdef HAVE_LIBETPAN
6073         GList *cur;
6074 #endif
6075         folder_item_set_xml(folder, item, tag);
6076
6077 #ifdef HAVE_LIBETPAN
6078         for (cur = tag->attr; cur != NULL; cur = g_list_next(cur)) {
6079                 XMLAttr *attr = (XMLAttr *) cur->data;
6080
6081                 if (!attr || !attr->name || !attr->value) continue;
6082                 if (!strcmp(attr->name, "uidnext"))
6083                         IMAP_FOLDER_ITEM(item)->uid_next = atoi(attr->value);
6084                 if (!strcmp(attr->name, "last_sync"))
6085                         IMAP_FOLDER_ITEM(item)->last_sync = atoi(attr->value);
6086                 if (!strcmp(attr->name, "last_change"))
6087                         IMAP_FOLDER_ITEM(item)->last_change = atoi(attr->value);
6088         }
6089         if (IMAP_FOLDER_ITEM(item)->last_change == 0)
6090                 IMAP_FOLDER_ITEM(item)->last_change = time(NULL);
6091 #endif
6092 }
6093
6094 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item)
6095 {
6096         XMLTag *tag;
6097
6098         tag = folder_item_get_xml(folder, item);
6099
6100 #ifdef HAVE_LIBETPAN
6101         xml_tag_add_attr(tag, xml_attr_new_int("uidnext",
6102                         IMAP_FOLDER_ITEM(item)->uid_next));
6103         xml_tag_add_attr(tag, xml_attr_new_int("last_sync",
6104                         IMAP_FOLDER_ITEM(item)->last_sync));
6105         xml_tag_add_attr(tag, xml_attr_new_int("last_change",
6106                         IMAP_FOLDER_ITEM(item)->last_change));
6107
6108 #endif
6109         return tag;
6110 }
6111
6112 /* ===================================================================
6113  * UTF-7 conversion routines as in RFC 2192
6114  * ===================================================================
6115  * These two functions from:
6116  * libimap library.
6117  * Copyright (C) 2003-2004 Pawel Salek. */
6118
6119 /* UTF7 modified base64 alphabet */
6120 static char base64chars[] =
6121   "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+,";
6122 #define UNDEFINED 64
6123
6124 /* UTF16 definitions */
6125 #define UTF16MASK       0x03FFUL
6126 #define UTF16SHIFT      10
6127 #define UTF16BASE       0x10000UL
6128 #define UTF16HIGHSTART  0xD800UL
6129 #define UTF16HIGHEND    0xDBFFUL
6130 #define UTF16LOSTART    0xDC00UL
6131 #define UTF16LOEND      0xDFFFUL
6132
6133
6134 /* Convert an IMAP mailbox to a UTF-8 string.
6135  *  dst needs to have roughly 4 times the storage space of src
6136  *    Hex encoding can triple the size of the input
6137  *    UTF-7 can be slightly denser than UTF-8
6138  *     (worst case: 8 octets UTF-7 becomes 9 octets UTF-8)
6139  */
6140 char* imap_modified_utf7_to_utf8(const char *mbox, gboolean change_spaces)
6141 {
6142   unsigned c, i, bitcount;
6143   unsigned long ucs4, utf16, bitbuf;
6144   unsigned char base64[256];
6145   const char *src;
6146   char *dst, *res  = g_malloc(2*strlen(mbox)+1);
6147
6148   dst = res;
6149   src = mbox;
6150   if(!dst) return NULL;
6151   /* initialize modified base64 decoding table */
6152   memset(base64, UNDEFINED, sizeof (base64));
6153   for (i = 0; i < sizeof (base64chars); ++i) {
6154     base64[(unsigned)base64chars[i]] = i;
6155   }
6156
6157   /* loop until end of string */
6158   while (*src != '\0') {
6159     c = *src++;
6160     /* deal with literal characters and &- */
6161     if (c != '&' || *src == '-') {
6162       /* encode literally */
6163       if (change_spaces && c == '_')
6164         *dst++ = ' ';
6165       else
6166         *dst++ = c;
6167       /* skip over the '-' if this is an &- sequence */
6168       if (c == '&') ++src;
6169     } else {
6170       /* convert modified UTF-7 -> UTF-16 -> UCS-4 -> UTF-8 -> HEX */
6171       bitbuf = 0;
6172       bitcount = 0;
6173       ucs4 = 0;
6174       while ((c = base64[(unsigned char) *src]) != UNDEFINED) {
6175         ++src;
6176         bitbuf = (bitbuf << 6) | c;
6177         bitcount += 6;
6178         /* enough bits for a UTF-16 character? */
6179         if (bitcount >= 16) {
6180           bitcount -= 16;
6181           utf16 = (bitcount ? bitbuf >> bitcount
6182                    : bitbuf) & 0xffff;
6183           /* convert UTF16 to UCS4 */
6184           if
6185             (utf16 >= UTF16HIGHSTART && utf16 <= UTF16HIGHEND) {
6186             ucs4 = (utf16 - UTF16HIGHSTART) << UTF16SHIFT;
6187             continue;
6188           } else if
6189             (utf16 >= UTF16LOSTART && utf16 <= UTF16LOEND) {
6190             ucs4 += utf16 - UTF16LOSTART + UTF16BASE;
6191           } else {
6192             ucs4 = utf16;
6193           }
6194
6195           /* convert UTF-16 range of UCS4 to UTF-8 */
6196           if (ucs4 <= 0x7fUL) {
6197             dst[0] = ucs4;
6198             dst += 1;
6199           } else if (ucs4 <= 0x7ffUL) {
6200             dst[0] = 0xc0 | (ucs4 >> 6);
6201             dst[1] = 0x80 | (ucs4 & 0x3f);
6202             dst += 2;
6203           } else if (ucs4 <= 0xffffUL) {
6204             dst[0] = 0xe0 | (ucs4 >> 12);
6205             dst[1] = 0x80 | ((ucs4 >> 6) & 0x3f);
6206             dst[2] = 0x80 | (ucs4 & 0x3f);
6207             dst += 3;
6208           } else {
6209             dst[0] = 0xf0 | (ucs4 >> 18);
6210             dst[1] = 0x80 | ((ucs4 >> 12) & 0x3f);
6211             dst[2] = 0x80 | ((ucs4 >> 6) & 0x3f);
6212             dst[3] = 0x80 | (ucs4 & 0x3f);
6213             dst += 4;
6214           }
6215         }
6216       }
6217       /* skip over trailing '-' in modified UTF-7 encoding */
6218       if (*src == '-') ++src;
6219     }
6220   }
6221   /* terminate destination string */
6222   *dst = '\0';
6223   return res;
6224 }
6225
6226 /* Convert hex coded UTF-8 string to modified UTF-7 IMAP mailbox
6227  *  dst should be about twice the length of src to deal with non-hex
6228  *  coded URLs
6229  */
6230 char* imap_utf8_to_modified_utf7(const char *src, gboolean change_spaces)
6231 {
6232   unsigned int utf8pos, utf8total, c, utf7mode, bitstogo, utf16flag;
6233   unsigned long ucs4 = 0, bitbuf = 0;
6234
6235   /* initialize hex lookup table */
6236   char *dst, *res;
6237
6238   if (!src) return NULL;
6239
6240   res = malloc(2*strlen(src)+1);
6241   dst = res;
6242   if(!dst) return NULL;
6243
6244   utf7mode = 0;
6245   utf8total = 0;
6246   bitstogo = 0;
6247   utf8pos = 0;
6248   while ((c = (unsigned char)*src) != '\0') {
6249     ++src;
6250     /* normal character? */
6251     if (c >= ' ' && c <= '~' && (c != '_' || !change_spaces)) {
6252       /* switch out of UTF-7 mode */
6253       if (utf7mode) {
6254         if (bitstogo) {
6255           *dst++ = base64chars[(bitbuf << (6 - bitstogo)) & 0x3F];
6256         }
6257         *dst++ = '-';
6258         utf7mode = 0;
6259         utf8pos  = 0;
6260         bitstogo = 0;
6261         utf8total= 0;
6262       }
6263       if (change_spaces && c == ' ')
6264         *dst++ = '_';
6265       else
6266         *dst++ = c;
6267       /* encode '&' as '&-' */
6268       if (c == '&') {
6269         *dst++ = '-';
6270       }
6271       continue;
6272     }
6273     /* switch to UTF-7 mode */
6274     if (!utf7mode) {
6275       *dst++ = '&';
6276       utf7mode = 1;
6277     }
6278     /* Encode US-ASCII characters as themselves */
6279     if (c < 0x80) {
6280       ucs4 = c;
6281     } else if (utf8total) {
6282       /* save UTF8 bits into UCS4 */
6283       ucs4 = (ucs4 << 6) | (c & 0x3FUL);
6284       if (++utf8pos < utf8total) {
6285         continue;
6286       }
6287     } else {
6288       utf8pos = 1;
6289       if (c < 0xE0) {
6290         utf8total = 2;
6291         ucs4 = c & 0x1F;
6292       } else if (c < 0xF0) {
6293         utf8total = 3;
6294         ucs4 = c & 0x0F;
6295       } else {
6296         /* NOTE: can't convert UTF8 sequences longer than 4 */
6297         utf8total = 4;
6298         ucs4 = c & 0x03;
6299       }
6300       continue;
6301     }
6302     /* loop to split ucs4 into two utf16 chars if necessary */
6303     utf8total = 0;
6304     do {
6305       if (ucs4 >= UTF16BASE) {
6306         ucs4 -= UTF16BASE;
6307         bitbuf = (bitbuf << 16) | ((ucs4 >> UTF16SHIFT)
6308                                    + UTF16HIGHSTART);
6309         ucs4 = (ucs4 & UTF16MASK) + UTF16LOSTART;
6310         utf16flag = 1;
6311       } else {
6312         bitbuf = (bitbuf << 16) | ucs4;
6313         utf16flag = 0;
6314       }
6315       bitstogo += 16;
6316       /* spew out base64 */
6317       while (bitstogo >= 6) {
6318         bitstogo -= 6;
6319         *dst++ = base64chars[(bitstogo ? (bitbuf >> bitstogo)
6320                               : bitbuf)
6321                              & 0x3F];
6322       }
6323     } while (utf16flag);
6324   }
6325   /* if in UTF-7 mode, finish in ASCII */
6326   if (utf7mode) {
6327     if (bitstogo) {
6328       *dst++ = base64chars[(bitbuf << (6 - bitstogo)) & 0x3F];
6329     }
6330     *dst++ = '-';
6331   }
6332   /* tie off string */
6333   *dst = '\0';
6334   return res;
6335 }