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                 return -1;
1677         statusbar_print_all(_("Adding messages..."));
1678         total = g_slist_length(file_list);
1679         for (cur = file_list; cur != NULL; cur = cur->next) {
1680                 IMAPFlags iflags = 0;
1681                 guint32 new_uid = 0;
1682                 gchar *real_file = NULL;
1683                 fileinfo = (MsgFileInfo *)cur->data;
1684
1685                 statusbar_progress_all(curnum, total, total < 10 ? 1:10);
1686                 curnum++;
1687
1688                 if (fileinfo->flags) {
1689                         if (MSG_IS_MARKED(*fileinfo->flags))
1690                                 iflags |= IMAP_FLAG_FLAGGED;
1691                         if (MSG_IS_REPLIED(*fileinfo->flags))
1692                                 iflags |= IMAP_FLAG_ANSWERED;
1693                         if (MSG_IS_FORWARDED(*fileinfo->flags))
1694                                 iflags |= IMAP_FLAG_FORWARDED;
1695                         if (MSG_IS_SPAM(*fileinfo->flags))
1696                                 iflags |= IMAP_FLAG_SPAM;
1697                         else
1698                                 iflags |= IMAP_FLAG_HAM;
1699                         if (!MSG_IS_UNREAD(*fileinfo->flags))
1700                                 iflags |= IMAP_FLAG_SEEN;
1701
1702                 }
1703
1704                 if (real_file == NULL)
1705                         real_file = g_strdup(fileinfo->file);
1706
1707                 if (folder_has_parent_of_type(dest, F_QUEUE) ||
1708                     folder_has_parent_of_type(dest, F_OUTBOX) ||
1709                     folder_has_parent_of_type(dest, F_DRAFT) ||
1710                     folder_has_parent_of_type(dest, F_TRASH))
1711                         iflags |= IMAP_FLAG_SEEN;
1712
1713                 ok = imap_cmd_append(session, IMAP_FOLDER_ITEM(dest), destdir, real_file, iflags,
1714                                      &new_uid);
1715
1716                 if (ok != MAILIMAP_NO_ERROR) {
1717                         g_warning("can't append message %s\n", real_file);
1718                         g_free(real_file);
1719                         g_free(destdir);
1720                         statusbar_progress_all(0,0,0);
1721                         statusbar_pop_all();
1722                         return -1;
1723                 } else {
1724                         debug_print("appended new message as %d\n", new_uid);
1725                         /* put the local file in the imapcache, so that we don't
1726                          * have to fetch it back later. */
1727
1728                         if (new_uid == 0) {
1729                                 missing_uids = TRUE;
1730                                 debug_print("Missing UID (0)\n");
1731                         }
1732                         if (new_uid > 0) {
1733                                 gchar *cache_path = folder_item_get_path(dest);
1734                                 if (!is_dir_exist(cache_path))
1735                                         make_dir_hier(cache_path);
1736                                 if (is_dir_exist(cache_path)) {
1737                                         gchar *cache_file = g_strconcat(
1738                                                 cache_path, G_DIR_SEPARATOR_S,
1739                                                 itos(new_uid), NULL);
1740                                         copy_file(real_file, cache_file, TRUE);
1741                                         debug_print("got UID %d, copied to cache: %s\n", new_uid, cache_file);
1742                                         g_free(cache_file);
1743                                 }
1744                                 g_free(cache_path);
1745                         }
1746                 }
1747
1748                 if (relation != NULL)
1749                         g_hash_table_insert(relation, fileinfo->msginfo != NULL ?
1750                                           (gpointer) fileinfo->msginfo : (gpointer) fileinfo,
1751                                           GINT_TO_POINTER(new_uid));
1752                 if (last_uid < new_uid) {
1753                         last_uid = new_uid;
1754                 }
1755
1756                 g_free(real_file);
1757         }
1758
1759         statusbar_progress_all(0,0,0);
1760         statusbar_pop_all();
1761
1762
1763         g_free(destdir);
1764
1765         imap_scan_required(folder, dest);
1766
1767         session = imap_session_get(folder);
1768         if (!session) {
1769                 return -1;
1770         }
1771         if (missing_uids) {
1772                 gint a;
1773                 ok = imap_select(session, IMAP_FOLDER(folder), dest,
1774                          &a, NULL, NULL, NULL, NULL, FALSE);
1775         }
1776         return last_uid;
1777 }
1778
1779 static GSList *flatten_mailimap_set(struct mailimap_set * set)
1780 {
1781         GSList *result = NULL;
1782         clistiter *list;
1783         guint32 start, end, t;
1784         GSList *cur;
1785
1786         if (!set || !set->set_list)
1787                 return NULL;
1788
1789         for (list = clist_begin(set->set_list); list; list = clist_next(list)) {
1790                 struct mailimap_set_item *item = (struct mailimap_set_item *)clist_content(list);
1791                 start = item->set_first;
1792                 end = item->set_last;
1793                 if (start <= end) {
1794                         for (t = start; t <= end; t++) {
1795                                 result = g_slist_prepend(result, GINT_TO_POINTER(t));
1796                         }
1797                 }
1798         }
1799         result = g_slist_reverse(result);
1800         if (debug_get_mode()) {
1801                 debug_print("flat imap set: ");
1802                 for (cur = result; cur; cur = cur->next) {
1803                         debug_print("%d ", GPOINTER_TO_INT(cur->data));
1804                 }
1805                 debug_print("\n");
1806         }
1807
1808         return result;
1809 }
1810 static gint imap_do_copy_msgs(Folder *folder, FolderItem *dest,
1811                               MsgInfoList *msglist, GHashTable *relation)
1812 {
1813         FolderItem *src;
1814         gchar *destdir;
1815         GSList *seq_list, *cur;
1816         MsgInfo *msginfo;
1817         IMAPSession *session;
1818         gint ok = MAILIMAP_NO_ERROR;
1819         GHashTable *uid_hash;
1820         gint last_num = 0;
1821
1822         g_return_val_if_fail(folder != NULL, -1);
1823         g_return_val_if_fail(dest != NULL, -1);
1824         g_return_val_if_fail(msglist != NULL, -1);
1825
1826         debug_print("getting session...\n");
1827         session = imap_session_get(folder);
1828
1829         if (!session) {
1830                 return -1;
1831         }
1832
1833         msginfo = (MsgInfo *)msglist->data;
1834         src = msginfo->folder;
1835         if (src == dest) {
1836                 g_warning("the src folder is identical to the dest.\n");
1837                 return -1;
1838         }
1839
1840         if (src->folder != dest->folder) {
1841                 GSList *infolist = NULL, *cur;
1842                 int res = -1;
1843                 for (cur = msglist; cur; cur = cur->next) {
1844                         msginfo = (MsgInfo *)cur->data;
1845                         MsgFileInfo *fileinfo = g_new0(MsgFileInfo, 1);
1846                         fileinfo->file = procmsg_get_message_file(msginfo);
1847                         fileinfo->flags = &(msginfo->flags);
1848                         infolist = g_slist_prepend(infolist, fileinfo);
1849                 }
1850                 infolist = g_slist_reverse(infolist);
1851                 res = folder_item_add_msgs(dest, infolist, FALSE);
1852                 for (cur = infolist; cur; cur = cur->next) {
1853                         MsgFileInfo *info = (MsgFileInfo *)cur->data;
1854                         g_free(info->file);
1855                         g_free(info);
1856                 }
1857                 g_slist_free(infolist);
1858                 return res;
1859         }
1860
1861         lock_session(session); /* unlocked later in the function */
1862
1863         ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
1864                          NULL, NULL, NULL, NULL, NULL, FALSE);
1865         if (ok != MAILIMAP_NO_ERROR) {
1866                 return ok;
1867         }
1868
1869         unlock_session(session);
1870
1871         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
1872
1873         if (is_fatal(ok))
1874                 return ok;
1875
1876         seq_list = imap_get_lep_set_from_msglist(IMAP_FOLDER(folder), msglist);
1877         uid_hash = g_hash_table_new(g_direct_hash, g_direct_equal);
1878
1879         statusbar_print_all(_("Copying messages..."));
1880         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
1881                 struct mailimap_set * seq_set;
1882                 struct mailimap_set * source = NULL;
1883                 struct mailimap_set * dest = NULL;
1884                 seq_set = cur->data;
1885
1886                 debug_print("Copying messages from %s to %s ...\n",
1887                             src->path, destdir);
1888
1889                 lock_session(session); /* unlocked later in the function */
1890                 ok = imap_cmd_copy(session, seq_set, destdir,
1891                         &source, &dest);
1892
1893                 if (is_fatal(ok)) {
1894                         session = NULL;
1895                 }
1896
1897                 if (ok == MAILIMAP_NO_ERROR) {
1898                         unlock_session(session);
1899                         if (relation && source && dest) {
1900                                 GSList *s_list = flatten_mailimap_set(source);
1901                                 GSList *d_list = flatten_mailimap_set(dest);
1902                                 GSList *s_cur, *d_cur;
1903                                 if (g_slist_length(s_list) == g_slist_length(d_list)) {
1904
1905                                         for (s_cur = s_list, d_cur = d_list;
1906                                              s_cur && d_cur;
1907                                              s_cur = s_cur->next, d_cur = d_cur->next) {
1908                                                 g_hash_table_insert(uid_hash, s_cur->data, d_cur->data);
1909                                         }
1910
1911                                 } else {
1912                                         debug_print("hhhmm, source list length != dest list length.\n");
1913                                 }
1914                                 g_slist_free(s_list);
1915                                 g_slist_free(d_list);
1916                         }
1917                 }
1918
1919
1920                 if (source)
1921                         mailimap_set_free(source);
1922                 if (dest)
1923                         mailimap_set_free(dest);
1924
1925                 if (ok != MAILIMAP_NO_ERROR) {
1926                         g_hash_table_destroy(uid_hash);
1927                         imap_lep_set_free(seq_list);
1928                         statusbar_pop_all();
1929                         return -1;
1930                 }
1931         }
1932
1933         for (cur = msglist; cur != NULL; cur = g_slist_next(cur)) {
1934                 MsgInfo *msginfo = (MsgInfo *)cur->data;
1935                 gpointer hashval;
1936
1937                 hashval = g_hash_table_lookup(uid_hash, GINT_TO_POINTER(msginfo->msgnum));
1938
1939                 if (hashval != NULL) {
1940                         gint num = GPOINTER_TO_INT(hashval);
1941                         g_hash_table_insert(relation, msginfo,
1942                                           GINT_TO_POINTER(num));
1943                         if (num > last_num)
1944                                 last_num = num;
1945                         debug_print("copied message %d as %d\n", msginfo->msgnum, num);
1946                         /* put the local file in the imapcache, so that we don't
1947                          * have to fetch it back later. */
1948                         if (num > 0) {
1949                                 gchar *cache_path = folder_item_get_path(msginfo->folder);
1950                                 gchar *real_file = g_strconcat(
1951                                         cache_path, G_DIR_SEPARATOR_S,
1952                                         itos(msginfo->msgnum), NULL);
1953                                 gchar *cache_file = NULL;
1954                                 g_free(cache_path);
1955                                 cache_path = folder_item_get_path(dest);
1956                                 cache_file = g_strconcat(
1957                                         cache_path, G_DIR_SEPARATOR_S,
1958                                         itos(num), NULL);
1959                                 if (!is_dir_exist(cache_path))
1960                                         make_dir_hier(cache_path);
1961                                 if (is_file_exist(real_file) && is_dir_exist(cache_path)) {
1962                                         copy_file(real_file, cache_file, TRUE);
1963                                         debug_print("copied to cache: %s\n", cache_file);
1964                                 }
1965                                 g_free(real_file);
1966                                 g_free(cache_file);
1967                                 g_free(cache_path);
1968                         }
1969                 } else
1970                         g_hash_table_insert(relation, msginfo,
1971                                           GINT_TO_POINTER(0));
1972         }
1973         statusbar_pop_all();
1974
1975         g_hash_table_destroy(uid_hash);
1976         imap_lep_set_free(seq_list);
1977
1978         g_free(destdir);
1979
1980         IMAP_FOLDER_ITEM(dest)->lastuid = 0;
1981         IMAP_FOLDER_ITEM(dest)->uid_next = 0;
1982         g_slist_free(IMAP_FOLDER_ITEM(dest)->uid_list);
1983         IMAP_FOLDER_ITEM(dest)->uid_list = NULL;
1984
1985         imap_scan_required(folder, dest);
1986         if (ok == MAILIMAP_NO_ERROR)
1987                 return last_num;
1988         else
1989                 return -1;
1990 }
1991
1992 static gint imap_copy_msg(Folder *folder, FolderItem *dest, MsgInfo *msginfo)
1993 {
1994         GSList msglist;
1995
1996         g_return_val_if_fail(msginfo != NULL, -1);
1997
1998         msglist.data = msginfo;
1999         msglist.next = NULL;
2000
2001         return imap_copy_msgs(folder, dest, &msglist, NULL);
2002 }
2003
2004 static gint imap_copy_msgs(Folder *folder, FolderItem *dest,
2005                     MsgInfoList *msglist, GHashTable *relation)
2006 {
2007         MsgInfo *msginfo;
2008         gint ret;
2009
2010         g_return_val_if_fail(folder != NULL, -1);
2011         g_return_val_if_fail(dest != NULL, -1);
2012         g_return_val_if_fail(msglist != NULL, -1);
2013
2014         msginfo = (MsgInfo *)msglist->data;
2015         g_return_val_if_fail(msginfo->folder != NULL, -1);
2016
2017         ret = imap_do_copy_msgs(folder, dest, msglist, relation);
2018         return ret;
2019 }
2020
2021 static gboolean imap_matcher_type_is_local(gint matchertype)
2022 {
2023         switch (matchertype) {
2024         case MATCHCRITERIA_FROM:
2025         case MATCHCRITERIA_TO:
2026         case MATCHCRITERIA_CC:
2027         case MATCHCRITERIA_TO_OR_CC:
2028         case MATCHCRITERIA_SUBJECT:
2029         case MATCHCRITERIA_REFERENCES:
2030         case MATCHCRITERIA_INREPLYTO:
2031         case MATCHCRITERIA_AGE_GREATER:
2032         case MATCHCRITERIA_AGE_LOWER:
2033         case MATCHCRITERIA_FORWARDED:
2034         case MATCHCRITERIA_SPAM:
2035         case MATCHCRITERIA_UNREAD:
2036         case MATCHCRITERIA_NEW:
2037         case MATCHCRITERIA_MARKED:
2038         case MATCHCRITERIA_REPLIED:
2039         case MATCHCRITERIA_DELETED:
2040         case MATCHCRITERIA_SIZE_GREATER:
2041         case MATCHCRITERIA_SIZE_SMALLER:
2042         case MATCHCRITERIA_SIZE_EQUAL:
2043                 return TRUE;
2044         }
2045         return FALSE;
2046 }
2047
2048 static IMAPSearchKey* search_make_key(MatcherProp* match, gboolean* is_all)
2049 {
2050         if (match->matchtype == MATCHTYPE_MATCHCASE || match->matchtype == MATCHTYPE_MATCH) {
2051                 IMAPSearchKey* result = NULL;
2052                 gboolean invert = FALSE;
2053                 gint matchertype = match->criteria;
2054
2055                 if (is_all) {
2056                         *is_all = FALSE;
2057                 }
2058
2059                 switch (matchertype) {
2060                 case MATCHCRITERIA_NOT_NEW: invert = TRUE; matchertype = MATCHCRITERIA_NEW; break;
2061                 case MATCHCRITERIA_NOT_MARKED: invert = TRUE; matchertype = MATCHCRITERIA_MARKED; break;
2062                 case MATCHCRITERIA_NOT_FORWARDED: invert = TRUE; matchertype = MATCHCRITERIA_FORWARDED; break;
2063                 case MATCHCRITERIA_NOT_SPAM: invert = TRUE; matchertype = MATCHCRITERIA_SPAM; break;
2064                 case MATCHCRITERIA_NOT_SUBJECT: invert = TRUE; matchertype = MATCHCRITERIA_SUBJECT; break;
2065                 case MATCHCRITERIA_NOT_FROM: invert = TRUE; matchertype = MATCHCRITERIA_FROM; break;
2066                 case MATCHCRITERIA_NOT_TO: invert = TRUE; matchertype = MATCHCRITERIA_TO; break;
2067                 case MATCHCRITERIA_NOT_CC: invert = TRUE; matchertype = MATCHCRITERIA_CC; break;
2068                 case MATCHCRITERIA_NOT_REFERENCES: invert = TRUE; matchertype = MATCHCRITERIA_REFERENCES; break;
2069                 case MATCHCRITERIA_NOT_HEADER: invert = TRUE; matchertype = MATCHCRITERIA_HEADER; break;
2070                 case MATCHCRITERIA_NOT_TAG: invert = TRUE; matchertype = MATCHCRITERIA_TAG; break;
2071                 case MATCHCRITERIA_NOT_HEADERS_PART: invert = TRUE; matchertype = MATCHCRITERIA_HEADERS_PART; break;
2072                 case MATCHCRITERIA_NOT_MESSAGE: invert = TRUE; matchertype = MATCHCRITERIA_MESSAGE; break;
2073                 case MATCHCRITERIA_NOT_BODY_PART: invert = TRUE; matchertype = MATCHCRITERIA_BODY_PART; break;
2074                 case MATCHCRITERIA_NOT_TO_AND_NOT_CC: invert = TRUE; matchertype = MATCHCRITERIA_TO_OR_CC; break;
2075                 case MATCHCRITERIA_NOT_INREPLYTO: invert = TRUE; matchertype = MATCHCRITERIA_INREPLYTO; break;
2076                 }
2077
2078                 /*
2079                  * this aborts conversion even for predicates understood by the following code.
2080                  * while that might seem wasteful, claws local search for information listed below
2081                  * has proven faster than IMAP search plus network roundtrips. once this changes,
2082                  * consider removing these exceptions.
2083                  */
2084                 if (imap_matcher_type_is_local(matchertype))
2085                         return NULL;
2086
2087                 /* the Message-ID header is also cached */
2088                 if (matchertype == MATCHCRITERIA_HEADER && g_strcmp0("Message-ID", match->header) == 0) {
2089                         return NULL;
2090                 }
2091
2092                 switch (matchertype) {
2093                 case MATCHCRITERIA_FORWARDED:
2094                         result = imap_search_new(IMAP_SEARCH_CRITERIA_TAG, NULL, RTAG_FORWARDED, 0);
2095                         break;
2096
2097                 case MATCHCRITERIA_SPAM:
2098                         result = imap_search_new(IMAP_SEARCH_CRITERIA_TAG, NULL, RTAG_JUNK, 0);
2099                         break;
2100
2101                 case MATCHCRITERIA_INREPLYTO:
2102                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, "In-Reply-To", match->expr, 0);
2103                         break;
2104
2105                 case MATCHCRITERIA_REFERENCES:
2106                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, "References", match->expr, 0);
2107                         break;
2108
2109                 case MATCHCRITERIA_TO_OR_CC:
2110                         result = imap_search_or(
2111                                         imap_search_new(IMAP_SEARCH_CRITERIA_TO, NULL, match->expr, 0),
2112                                         imap_search_new(IMAP_SEARCH_CRITERIA_CC, NULL, match->expr, 0)
2113                                         );
2114                         break;
2115
2116                 case MATCHCRITERIA_HEADERS_PART:
2117                         result = imap_search_and(
2118                                         imap_search_not(imap_search_new(IMAP_SEARCH_CRITERIA_BODY, NULL, match->expr, 0)),
2119                                         imap_search_new(IMAP_SEARCH_CRITERIA_MESSAGE, NULL, match->expr, 0)
2120                                         );
2121                         break;
2122
2123                 case MATCHCRITERIA_SIZE_EQUAL:
2124                         result = imap_search_and(
2125                                         imap_search_not(imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_SMALLER, NULL, NULL, match->value)),
2126                                         imap_search_not(imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_GREATER, NULL, NULL, match->value))
2127                                         );
2128                         break;
2129
2130                 case MATCHCRITERIA_NOT_UNREAD:
2131                         result = imap_search_new(IMAP_SEARCH_CRITERIA_READ, NULL, NULL, 0);
2132                         break;
2133
2134                 case MATCHCRITERIA_UNREAD:
2135                         result = imap_search_new(IMAP_SEARCH_CRITERIA_UNREAD, NULL, NULL, 0);
2136                         break;
2137
2138                 case MATCHCRITERIA_NEW:
2139                         result = imap_search_new(IMAP_SEARCH_CRITERIA_NEW, NULL, NULL, 0);
2140                         break;
2141
2142                 case MATCHCRITERIA_MARKED:
2143                         result = imap_search_new(IMAP_SEARCH_CRITERIA_MARKED, NULL, NULL, 0);
2144                         break;
2145
2146                 case MATCHCRITERIA_DELETED:
2147                         result = imap_search_new(IMAP_SEARCH_CRITERIA_DELETED, NULL, NULL, 0);
2148                         break;
2149
2150                 case MATCHCRITERIA_REPLIED:
2151                         result = imap_search_new(IMAP_SEARCH_CRITERIA_REPLIED, NULL, NULL, 0);
2152                         break;
2153
2154                 case MATCHCRITERIA_TAG:
2155                         {
2156                                 gchar *tmp = imap_utf8_to_modified_utf7(match->expr, TRUE);
2157                                 result = imap_search_new(IMAP_SEARCH_CRITERIA_TAG, NULL, tmp, 0);
2158                                 g_free(tmp);
2159                         }
2160                         break;
2161
2162                 case MATCHCRITERIA_SUBJECT:
2163                         result = imap_search_new(IMAP_SEARCH_CRITERIA_SUBJECT, NULL, match->expr, 0);
2164                         break;
2165
2166                 case MATCHCRITERIA_FROM:
2167                         result = imap_search_new(IMAP_SEARCH_CRITERIA_FROM, NULL, match->expr, 0);
2168                         break;
2169
2170                 case MATCHCRITERIA_TO:
2171                         result = imap_search_new(IMAP_SEARCH_CRITERIA_TO, NULL, match->expr, 0);
2172                         break;
2173
2174                 case MATCHCRITERIA_CC:
2175                         result = imap_search_new(IMAP_SEARCH_CRITERIA_CC, NULL, match->expr, 0);
2176                         break;
2177
2178                 case MATCHCRITERIA_AGE_GREATER:
2179                         result = imap_search_new(IMAP_SEARCH_CRITERIA_AGE_GREATER, NULL, NULL, match->value);
2180                         break;
2181
2182                 case MATCHCRITERIA_AGE_LOWER:
2183                         result = imap_search_new(IMAP_SEARCH_CRITERIA_AGE_LOWER, NULL, NULL, match->value);
2184                         break;
2185
2186                 case MATCHCRITERIA_BODY_PART:
2187                         result = imap_search_new(IMAP_SEARCH_CRITERIA_BODY, NULL, match->expr, 0);
2188                         break;
2189
2190                 case MATCHCRITERIA_MESSAGE:
2191                         result = imap_search_new(IMAP_SEARCH_CRITERIA_MESSAGE, NULL, match->expr, 0);
2192                         break;
2193
2194                 case MATCHCRITERIA_HEADER:
2195                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, match->header, match->expr, 0);
2196                         break;
2197
2198                 case MATCHCRITERIA_SIZE_GREATER:
2199                         result = imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_GREATER, NULL, NULL, match->value);
2200                         break;
2201
2202                 case MATCHCRITERIA_SIZE_SMALLER:
2203                         result = imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_SMALLER, NULL, NULL, match->value);
2204                         break;
2205
2206                 default:
2207                         result = imap_search_new(IMAP_SEARCH_CRITERIA_ALL, NULL, NULL, 0);
2208                         if (is_all) {
2209                                 *is_all = TRUE;
2210                         }
2211                         break;
2212                 }
2213
2214                 if (invert) {
2215                         result = imap_search_not(result);
2216                         if (is_all && *is_all) {
2217                                 *is_all = FALSE;
2218                         }
2219                 }
2220
2221                 return result;
2222         }
2223
2224         return NULL;
2225 }
2226
2227 static void imap_change_search_charset(IMAPFolder *folder)
2228 {
2229         /* If server supports charset in searches, but the last used one failed,
2230          * changed to the next preferred charset. If none are still available,
2231          * disable charset searches.
2232          * Charsets are tried in the following order:
2233          * UTF-8, locale's charset, UTF-7.
2234          */
2235
2236         if (folder->search_charset_supported) {
2237                 if (folder->search_charset && !strcmp(folder->search_charset, conv_get_locale_charset_str_no_utf8()))
2238                         folder->search_charset = "UTF-8";
2239                 else if (folder->search_charset && !strcmp(folder->search_charset, "UTF-8"))
2240                         folder->search_charset = "UTF-7";
2241                 else {
2242                         folder->search_charset = NULL;
2243                         folder->search_charset_supported = FALSE;
2244                 }
2245         }
2246 }
2247
2248 static MatcherProp *imap_matcher_prop_set_charset(IMAPFolder *folder,
2249                                                   MatcherProp *utf8_prop,
2250                                                   gchar **charset)
2251 {
2252         /* If the match is going to be done locally, or the criteria is on
2253          * tag (special-cased to modified-UTF-7), or the expression searched
2254          * is ASCII, don't bother converting.
2255          */
2256         if (imap_matcher_type_is_local(utf8_prop->criteria)
2257          || utf8_prop->criteria == MATCHCRITERIA_TAG
2258          || utf8_prop->criteria == MATCHCRITERIA_NOT_TAG
2259          || utf8_prop->expr == NULL
2260          || is_ascii_str(utf8_prop->expr))
2261                 return matcherprop_new(utf8_prop->criteria,
2262                                utf8_prop->header,
2263                                utf8_prop->matchtype,
2264                                utf8_prop->expr,
2265                                utf8_prop->value);
2266         else {
2267                 gchar *conv_expr = NULL;
2268
2269                 /* If the search is server-side and the server doesn't support
2270                  * searching with the charsets we handle, bail out.
2271                  */
2272                 if (folder->search_charset_supported == FALSE)
2273                         return NULL;
2274
2275                 /* Else, convert. */
2276                 if (*charset == NULL)
2277                         *charset = g_strdup(folder->search_charset);
2278
2279                 conv_expr = conv_codeset_strdup(utf8_prop->expr, CS_UTF_8, *charset);
2280
2281                 if (conv_expr == NULL)
2282                         conv_expr = g_strdup(utf8_prop->expr);
2283
2284                 return matcherprop_new(utf8_prop->criteria,
2285                                utf8_prop->header,
2286                                utf8_prop->matchtype,
2287                                conv_expr,
2288                                utf8_prop->value);
2289         }
2290 }
2291
2292 static gint     search_msgs             (Folder                 *folder,
2293                                          FolderItem             *container,
2294                                          MsgNumberList          **msgs,
2295                                          gboolean               *on_server,
2296                                          MatcherList            *predicate,
2297                                          SearchProgressNotify   progress_cb,
2298                                          gpointer               progress_data)
2299 {
2300         IMAPSearchKey* key = NULL;
2301         GSList* cur;
2302         int result = -1;
2303         clist* uidlist = NULL;
2304         gboolean server_filtering_useless = FALSE;
2305         IMAPSession *session;
2306         gchar *charset_to_use = NULL;
2307
2308         if (on_server == NULL || !*on_server) {
2309                 return folder_item_search_msgs_local(folder, container, msgs, on_server,
2310                                 predicate, progress_cb, progress_data);
2311         }
2312
2313         for (cur = predicate->matchers; cur != NULL; cur = cur->next) {
2314                 IMAPSearchKey* matcherPart = NULL;
2315                 MatcherProp* prop = (MatcherProp*) cur->data;
2316                 gboolean is_all;
2317                 MatcherProp *imap_prop = imap_matcher_prop_set_charset(IMAP_FOLDER(folder), prop, &charset_to_use);
2318
2319                 if (imap_prop == NULL) {
2320                         /* Couldn't convert matcherprop to IMAP - probably not ascii
2321                          * and server doesn't support the charsets we do. */
2322                          return -1;
2323                 }
2324
2325                 matcherPart = search_make_key(imap_prop, &is_all);
2326
2327                 matcherprop_free(imap_prop);
2328
2329                 if (on_server) {
2330                         *on_server &= matcherPart != NULL && prop->matchtype == MATCHTYPE_MATCHCASE;
2331                 }
2332
2333                 if (matcherPart) {
2334                         if (key == NULL) {
2335                                 key = matcherPart;
2336                                 server_filtering_useless = is_all;
2337                         } else if (predicate->bool_and) {
2338                                 key = imap_search_and(key, matcherPart);
2339                                 server_filtering_useless &= is_all;
2340                         } else {
2341                                 key = imap_search_or(key, matcherPart);
2342                                 server_filtering_useless |= is_all;
2343                         }
2344                 }
2345         }
2346
2347         if (server_filtering_useless) {
2348                 imap_search_free(key);
2349                 key = NULL;
2350         }
2351
2352         if (key == NULL && progress_cb != NULL) {
2353                 GSList* cur;
2354                 GSList* list;
2355                 int count = 0;
2356
2357                 progress_cb(progress_data, TRUE, 0, 0, container->total_msgs);
2358                 progress_cb(progress_data, TRUE, container->total_msgs, 0, container->total_msgs);
2359
2360                 list = folder_item_get_msg_list(container);
2361                 for (cur = list; cur != NULL; cur = cur->next) {
2362                         *msgs = g_slist_prepend(*msgs, GUINT_TO_POINTER(((MsgInfo*) cur->data)->msgnum));
2363                         count++;
2364                 }
2365                 procmsg_msg_list_free(list);
2366
2367                 *msgs = g_slist_reverse(*msgs);
2368
2369                 return count;
2370         }
2371
2372         session = imap_session_get(folder);
2373         if (!session) {
2374                 return -1;
2375         }
2376         result = imap_select(session, IMAP_FOLDER(folder), FOLDER_ITEM(container),
2377                          NULL, NULL, NULL, NULL, NULL, TRUE);
2378         if (result != MAILIMAP_NO_ERROR)
2379                 return -1;
2380
2381         if (progress_cb)
2382                 progress_cb(progress_data, TRUE, 0, 0, container->total_msgs);
2383         result = imap_threaded_search(folder, IMAP_SEARCH_TYPE_KEYED, key, charset_to_use, NULL, &uidlist);
2384         if (progress_cb)
2385                 progress_cb(progress_data, TRUE, container->total_msgs, 0, container->total_msgs);
2386
2387         if (result == MAILIMAP_NO_ERROR) {
2388                 gint result = 0;
2389
2390                 *msgs = imap_uid_list_from_lep(uidlist, &result);
2391
2392                 mailimap_search_result_free(uidlist);
2393
2394                 if (charset_to_use != NULL)
2395                         g_free(charset_to_use);
2396
2397                 return result;
2398         } else if (charset_to_use != NULL) {
2399                 /* If search failed and was on an 8-bit string, try the next
2400                  * available charset to search if there still are some.
2401                  */
2402                 g_free(charset_to_use);
2403
2404                 imap_change_search_charset(IMAP_FOLDER(folder));
2405                 if (IMAP_FOLDER(folder)->search_charset_supported)
2406                         return search_msgs(folder, container, msgs, on_server, predicate,
2407                                    progress_cb, progress_data);
2408                 else
2409                         return -1;
2410         } else {
2411                 return -1;
2412         }
2413 }
2414
2415
2416 static gint imap_do_remove_msgs(Folder *folder, FolderItem *dest,
2417                                 MsgInfoList *msglist, GHashTable *relation)
2418 {
2419         gchar *destdir, *dir;
2420         GSList *numlist = NULL, *cur;
2421         MsgInfo *msginfo;
2422         IMAPSession *session;
2423         gint ok = MAILIMAP_NO_ERROR;
2424
2425         g_return_val_if_fail(folder != NULL, -1);
2426         g_return_val_if_fail(dest != NULL, -1);
2427         g_return_val_if_fail(msglist != NULL, -1);
2428
2429         debug_print("getting session...\n");
2430         session = imap_session_get(folder);
2431         if (!session) {
2432                 return -1;
2433         }
2434
2435         lock_session(session); /* unlocked later in the function */
2436
2437         msginfo = (MsgInfo *)msglist->data;
2438
2439         ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
2440                          NULL, NULL, NULL, NULL, NULL, FALSE);
2441         if (ok != MAILIMAP_NO_ERROR) {
2442                 return ok;
2443         }
2444
2445         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
2446         if (is_fatal(ok)) {
2447                 g_free(destdir);
2448                 return ok;
2449         }
2450         for (cur = msglist; cur; cur = cur->next) {
2451                 msginfo = (MsgInfo *)cur->data;
2452                 if (!MSG_IS_DELETED(msginfo->flags))
2453                         numlist = g_slist_prepend(numlist, GINT_TO_POINTER(msginfo->msgnum));
2454         }
2455         numlist = g_slist_reverse(numlist);
2456
2457         if (numlist != NULL) {
2458                 ok = imap_set_message_flags
2459                         (session, IMAP_FOLDER_ITEM(msginfo->folder), numlist, IMAP_FLAG_DELETED, NULL, TRUE);
2460                 if (ok != MAILIMAP_NO_ERROR) {
2461                         log_warning(LOG_PROTOCOL, _("can't set deleted flags\n"));
2462                         g_free(destdir);
2463                         return ok;
2464                 }
2465         } /* else we just need to expunge */
2466         ok = imap_cmd_expunge(session, folder->account->imap_use_trash);
2467         if (ok != MAILIMAP_NO_ERROR) {
2468                 log_warning(LOG_PROTOCOL, _("can't expunge\n"));
2469                 g_free(destdir);
2470                 return ok;
2471         }
2472
2473         session->folder_content_changed = TRUE;
2474         unlock_session(session);
2475
2476         dir = folder_item_get_path(msginfo->folder);
2477         if (is_dir_exist(dir)) {
2478                 for (cur = msglist; cur; cur = cur->next) {
2479                         msginfo = (MsgInfo *)cur->data;
2480                         remove_numbered_files(dir, msginfo->msgnum, msginfo->msgnum);
2481                 }
2482         }
2483         g_free(dir);
2484
2485         g_slist_free(numlist);
2486
2487         imap_scan_required(folder, dest);
2488
2489         g_free(destdir);
2490         if (ok == MAILIMAP_NO_ERROR)
2491                 return 0;
2492         else
2493                 return -1;
2494 }
2495
2496 static gint imap_remove_msgs(Folder *folder, FolderItem *dest,
2497                     MsgInfoList *msglist, GHashTable *relation)
2498 {
2499         MsgInfo *msginfo;
2500
2501         g_return_val_if_fail(folder != NULL, -1);
2502         g_return_val_if_fail(dest != NULL, -1);
2503         if (msglist == NULL)
2504                 return 0;
2505
2506         msginfo = (MsgInfo *)msglist->data;
2507         g_return_val_if_fail(msginfo->folder != NULL, -1);
2508
2509         return imap_do_remove_msgs(folder, dest, msglist, relation);
2510 }
2511
2512 static gint imap_remove_all_msg(Folder *folder, FolderItem *item)
2513 {
2514         GSList *list = folder_item_get_msg_list(item);
2515         gint res = imap_remove_msgs(folder, item, list, NULL);
2516         procmsg_msg_list_free(list);
2517         return res;
2518 }
2519
2520 static gboolean imap_is_msg_changed(Folder *folder, FolderItem *item,
2521                                     MsgInfo *msginfo)
2522 {
2523         /* TODO: properly implement this method */
2524         return FALSE;
2525 }
2526
2527 static gint imap_close(Folder *folder, FolderItem *item)
2528 {
2529         return 0;
2530 }
2531
2532 static gint imap_scan_tree_real(Folder *folder, gboolean subs_only)
2533 {
2534         FolderItem *item = NULL;
2535         IMAPSession *session;
2536         gchar *root_folder = NULL;
2537
2538         g_return_val_if_fail(folder != NULL, -1);
2539         g_return_val_if_fail(folder->account != NULL, -1);
2540
2541         debug_print("getting session...\n");
2542         session = imap_session_get(folder);
2543         if (!session) {
2544                 if (!folder->node) {
2545                         folder_tree_destroy(folder);
2546                         item = folder_item_new(folder, folder->name, NULL);
2547                         item->folder = folder;
2548                         folder->node = item->node = g_node_new(item);
2549                 }
2550                 return -1;
2551         }
2552
2553         if (folder->account->imap_dir && *folder->account->imap_dir) {
2554                 gchar *real_path;
2555                 int r = MAILIMAP_NO_ERROR;
2556                 clist * lep_list;
2557
2558                 Xstrdup_a(root_folder, folder->account->imap_dir, {return -1;});
2559                 extract_quote(root_folder, '"');
2560                 subst_char(root_folder,
2561                            imap_get_path_separator(session, IMAP_FOLDER(folder),
2562                                                    root_folder, &r),
2563                            '/');
2564                 if (is_fatal(r))
2565                         return -1;
2566                 strtailchomp(root_folder, '/');
2567                 real_path = imap_get_real_path
2568                         (session, IMAP_FOLDER(folder), root_folder, &r);
2569                 if (is_fatal(r))
2570                         return -1;
2571                 debug_print("IMAP root directory: %s\n", real_path);
2572
2573                 /* check if root directory exist */
2574
2575                 r = imap_threaded_list(session->folder, "", real_path,
2576                                        &lep_list);
2577
2578                 if (r != MAILIMAP_NO_ERROR)
2579                         imap_handle_error(SESSION(session), NULL, r);
2580
2581                 if ((r != MAILIMAP_NO_ERROR) || (clist_count(lep_list) == 0)) {
2582                         if (!folder->node) {
2583                                 item = folder_item_new(folder, folder->name, NULL);
2584                                 item->folder = folder;
2585                                 folder->node = item->node = g_node_new(item);
2586                         }
2587                         return -1;
2588                 }
2589                 mailimap_list_result_free(lep_list);
2590
2591                 g_free(real_path);
2592         }
2593
2594         if (folder->node)
2595                 item = FOLDER_ITEM(folder->node->data);
2596
2597         if (item && !item->path && root_folder) {
2598                 item->path = g_strdup(root_folder);
2599         }
2600
2601         if (!item || ((item->path || root_folder) &&
2602                       strcmp2(item->path, root_folder) != 0)) {
2603                 folder_tree_destroy(folder);
2604                 item = folder_item_new(folder, folder->name, root_folder);
2605                 item->folder = folder;
2606                 folder->node = item->node = g_node_new(item);
2607         }
2608
2609         imap_scan_tree_recursive(session, FOLDER_ITEM(folder->node->data), subs_only);
2610         imap_create_missing_folders(folder);
2611
2612         return 0;
2613 }
2614
2615 static gint imap_scan_tree(Folder *folder)
2616 {
2617         gboolean subs_only = FALSE;
2618         if (folder->account) {
2619                 debug_print(" scanning only subs %d\n", folder->account->imap_subsonly);
2620                 subs_only = folder->account->imap_subsonly;
2621         }
2622         return imap_scan_tree_real(folder, subs_only);
2623 }
2624
2625 static gint imap_scan_tree_recursive(IMAPSession *session, FolderItem *item, gboolean subs_only)
2626 {
2627         Folder *folder;
2628         IMAPFolder *imapfolder;
2629         FolderItem *new_item;
2630         GSList *item_list, *cur;
2631         GNode *node;
2632         gchar *real_path;
2633         gchar *wildcard_path;
2634         gchar separator;
2635         gchar wildcard[3];
2636         clist * lep_list;
2637         int r = MAILIMAP_NO_ERROR;
2638
2639         g_return_val_if_fail(item != NULL, -1);
2640         g_return_val_if_fail(item->folder != NULL, -1);
2641         g_return_val_if_fail(item->no_sub == FALSE, -1);
2642
2643         folder = item->folder;
2644         imapfolder = IMAP_FOLDER(folder);
2645
2646         separator = imap_get_path_separator(session, imapfolder, item->path, &r);
2647         if (is_fatal(r))
2648                 return r;
2649
2650         if (folder->ui_func)
2651                 folder->ui_func(folder, item, folder->ui_func_data);
2652
2653         if (item->path) {
2654                 wildcard[0] = separator;
2655                 wildcard[1] = '%';
2656                 wildcard[2] = '\0';
2657                 real_path = imap_get_real_path(session, imapfolder, item->path, &r);
2658                 if (is_fatal(r)) {
2659                         g_free(real_path);
2660                         return r;
2661                 }
2662         } else {
2663                 wildcard[0] = '%';
2664                 wildcard[1] = '\0';
2665                 real_path = g_strdup("");
2666         }
2667
2668         Xstrcat_a(wildcard_path, real_path, wildcard,
2669                   {g_free(real_path); return MAILIMAP_ERROR_BAD_STATE;});
2670         lep_list = NULL;
2671
2672         if (subs_only)
2673                 r = imap_threaded_lsub(folder, "", wildcard_path, &lep_list);
2674         else
2675                 r = imap_threaded_list(folder, "", wildcard_path, &lep_list);
2676
2677         if (r != MAILIMAP_NO_ERROR) {
2678                 imap_handle_error(SESSION(session), NULL, r);
2679                 item_list = NULL;
2680                 g_free(real_path);
2681                 return r;
2682         }
2683         else {
2684                 item_list = imap_list_from_lep(imapfolder,
2685                                                lep_list, real_path, FALSE);
2686                 mailimap_list_result_free(lep_list);
2687         }
2688
2689         g_free(real_path);
2690
2691         node = item->node->children;
2692         while (node != NULL) {
2693                 FolderItem *old_item = FOLDER_ITEM(node->data);
2694                 GNode *next = node->next;
2695
2696                 new_item = NULL;
2697                 for (cur = item_list; cur != NULL; cur = cur->next) {
2698                         FolderItem *cur_item = FOLDER_ITEM(cur->data);
2699                         if (!strcmp2(old_item->path, cur_item->path)) {
2700                                 new_item = cur_item;
2701                                 break;
2702                         }
2703                 }
2704                 if (!new_item) {
2705                         if (old_item && old_item->path && !strcmp(old_item->path, "INBOX")) {
2706                                 debug_print("not removing INBOX\n");
2707                         } else {
2708                                 debug_print("folder '%s' not found. removing...\n",
2709                                             old_item->path);
2710                                 folder_item_remove(old_item);
2711                         }
2712                 } else {
2713                         old_item->no_sub = new_item->no_sub;
2714                         old_item->no_select = new_item->no_select;
2715                         if (old_item->no_sub == TRUE && node->children) {
2716                                 debug_print("folder '%s' doesn't have "
2717                                             "subfolders. removing...\n",
2718                                             old_item->path);
2719                                 folder_item_remove_children(old_item);
2720                         }
2721                 }
2722
2723                 node = next;
2724         }
2725
2726         for (cur = item_list; cur != NULL; cur = cur->next) {
2727                 FolderItem *cur_item = FOLDER_ITEM(cur->data);
2728                 new_item = NULL;
2729
2730                 for (node = item->node->children; node != NULL;
2731                      node = node->next) {
2732                         if (!strcmp2(FOLDER_ITEM(node->data)->path,
2733                                      cur_item->path)) {
2734                                 new_item = FOLDER_ITEM(node->data);
2735                                 folder_item_destroy(cur_item);
2736                                 cur_item = NULL;
2737                                 break;
2738                         }
2739                 }
2740                 if (!new_item) {
2741                         new_item = cur_item;
2742                         debug_print("new folder '%s' found.\n", new_item->path);
2743                         folder_item_append(item, new_item);
2744                 }
2745
2746                 if (!strcmp(new_item->path, "INBOX")) {
2747                         new_item->stype = F_INBOX;
2748                         folder->inbox = new_item;
2749                 } else if (!folder_item_parent(item) || item->stype == F_INBOX) {
2750                         gchar *base;
2751
2752                         base = g_path_get_basename(new_item->path);
2753
2754                         if (!folder->outbox && !g_ascii_strcasecmp(base, "Sent")) {
2755                                 new_item->stype = F_OUTBOX;
2756                                 folder->outbox = new_item;
2757                         } else if (!folder->draft && !g_ascii_strcasecmp(base, "Drafts")) {
2758                                 new_item->stype = F_DRAFT;
2759                                 folder->draft = new_item;
2760                         } else if (!folder->queue && !g_ascii_strcasecmp(base, "Queue")) {
2761                                 new_item->stype = F_QUEUE;
2762                                 folder->queue = new_item;
2763                         } else if (!folder->trash && !g_ascii_strcasecmp(base, "Trash")) {
2764                                 new_item->stype = F_TRASH;
2765                                 folder->trash = new_item;
2766                         }
2767                         g_free(base);
2768                 }
2769
2770                 if (new_item->no_sub == FALSE)
2771                         imap_scan_tree_recursive(session, new_item, subs_only);
2772         }
2773
2774         g_slist_free(item_list);
2775
2776         return MAILIMAP_NO_ERROR;
2777 }
2778
2779 GList *imap_scan_subtree(Folder *folder, FolderItem *item, gboolean unsubs_only, gboolean recursive)
2780 {
2781         IMAPSession *session = imap_session_get(folder);
2782         gchar *real_path;
2783         gchar *wildcard_path;
2784         gchar separator;
2785         gchar wildcard[3];
2786         clist * lep_list;
2787         GSList *item_list = NULL, *cur;
2788         GList *child_list = NULL, *tmplist = NULL;
2789         GSList *sub_list = NULL;
2790         int r = MAILIMAP_NO_ERROR;
2791
2792         if (!session)
2793                 return NULL;
2794
2795         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &r);
2796         if (is_fatal(r))
2797                 return NULL;
2798
2799         if (item->path) {
2800                 wildcard[0] = separator;
2801                 wildcard[1] = '%';
2802                 wildcard[2] = '\0';
2803                 real_path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &r);
2804                 if (is_fatal(r)) {
2805                         g_free(real_path);
2806                         return NULL;
2807                 }
2808         } else {
2809                 wildcard[0] = '%';
2810                 wildcard[1] = '\0';
2811                 real_path = g_strdup("");
2812         }
2813
2814         Xstrcat_a(wildcard_path, real_path, wildcard,
2815                   {g_free(real_path); return NULL;});
2816         lep_list = NULL;
2817
2818         if (unsubs_only)
2819                 statusbar_print_all(_("Looking for unsubscribed folders in %s..."),
2820                                 item->path?item->path:item->name);
2821         else
2822                 statusbar_print_all(_("Looking for subfolders of %s..."),
2823                                 item->path?item->path:item->name);
2824
2825         r = imap_threaded_list(folder, "", wildcard_path, &lep_list);
2826         if (r) {
2827                 g_free(real_path);
2828                 statusbar_pop_all();
2829                 return NULL;
2830         }
2831         item_list = imap_list_from_lep(IMAP_FOLDER(folder),
2832                                lep_list, real_path, FALSE);
2833         mailimap_list_result_free(lep_list);
2834
2835         for (cur = item_list; cur != NULL; cur = cur->next) {
2836                 FolderItem *cur_item = FOLDER_ITEM(cur->data);
2837                 if (recursive) {
2838                         tmplist = imap_scan_subtree(folder, cur_item,
2839                                         unsubs_only, recursive);
2840                         if (tmplist)
2841                                 child_list = g_list_concat(child_list, tmplist);
2842                 }
2843                 child_list = g_list_prepend(child_list,
2844                                 imap_get_real_path(session,
2845                                         IMAP_FOLDER(folder), cur_item->path, &r));
2846                 if (is_fatal(r)) {
2847                         g_free(real_path);
2848                         statusbar_pop_all();
2849                         return NULL;
2850                 }
2851                 folder_item_destroy(cur_item);
2852         }
2853         child_list = g_list_reverse(child_list);
2854         g_slist_free(item_list);
2855
2856         if (unsubs_only) {
2857                 r = imap_threaded_lsub(folder, "", wildcard_path, &lep_list);
2858                 if (r) {
2859                         g_free(real_path);
2860                         statusbar_pop_all();
2861                         return NULL;
2862                 }
2863                 sub_list = imap_list_from_lep(IMAP_FOLDER(folder),
2864                                        lep_list, real_path, FALSE);
2865                 mailimap_list_result_free(lep_list);
2866
2867                 for (cur = sub_list; cur != NULL; cur = cur->next) {
2868                         FolderItem *cur_item = FOLDER_ITEM(cur->data);
2869                         GList *oldlitem = NULL;
2870                         gchar *tmp = imap_get_real_path(session,
2871                                         IMAP_FOLDER(folder), cur_item->path, &r);
2872                         if (r) {
2873                                 g_free(real_path);
2874                                 statusbar_pop_all();
2875                                 return NULL;
2876                         }
2877                         folder_item_destroy(cur_item);
2878                         oldlitem = g_list_find_custom(
2879                                         child_list, tmp, (GCompareFunc)strcmp2);
2880                         if (oldlitem) {
2881                                 child_list = g_list_remove_link(child_list, oldlitem);
2882                                 g_free(oldlitem->data);
2883                                 g_list_free(oldlitem);
2884                         }
2885                         g_free(tmp);
2886                 }
2887         }
2888
2889         g_free(real_path);
2890         statusbar_pop_all();
2891
2892         return child_list;
2893 }
2894
2895 static gint imap_create_tree(Folder *folder)
2896 {
2897         g_return_val_if_fail(folder != NULL, -1);
2898         g_return_val_if_fail(folder->node != NULL, -1);
2899         g_return_val_if_fail(folder->node->data != NULL, -1);
2900         g_return_val_if_fail(folder->account != NULL, -1);
2901
2902         imap_scan_tree(folder);
2903         imap_create_missing_folders(folder);
2904
2905         return 0;
2906 }
2907
2908 static void imap_create_missing_folders(Folder *folder)
2909 {
2910         g_return_if_fail(folder != NULL);
2911
2912         if (!folder->inbox)
2913                 folder->inbox = imap_create_special_folder
2914                         (folder, F_INBOX, "INBOX");
2915         if (!folder->trash)
2916                 folder->trash = imap_create_special_folder
2917                         (folder, F_TRASH, "Trash");
2918         if (!folder->queue)
2919                 folder->queue = imap_create_special_folder
2920                         (folder, F_QUEUE, "Queue");
2921         if (!folder->outbox)
2922                 folder->outbox = imap_create_special_folder
2923                         (folder, F_OUTBOX, "Sent");
2924         if (!folder->draft)
2925                 folder->draft = imap_create_special_folder
2926                         (folder, F_DRAFT, "Drafts");
2927 }
2928
2929 static FolderItem *imap_create_special_folder(Folder *folder,
2930                                               SpecialFolderItemType stype,
2931                                               const gchar *name)
2932 {
2933         FolderItem *item;
2934         FolderItem *new_item;
2935
2936         g_return_val_if_fail(folder != NULL, NULL);
2937         g_return_val_if_fail(folder->node != NULL, NULL);
2938         g_return_val_if_fail(folder->node->data != NULL, NULL);
2939         g_return_val_if_fail(folder->account != NULL, NULL);
2940         g_return_val_if_fail(name != NULL, NULL);
2941
2942         item = FOLDER_ITEM(folder->node->data);
2943         new_item = imap_create_folder(folder, item, name);
2944
2945         if (!new_item) {
2946                 g_warning("Can't create '%s'\n", name);
2947                 if (!folder->inbox) return NULL;
2948
2949                 new_item = imap_create_folder(folder, folder->inbox, name);
2950                 if (!new_item)
2951                         g_warning("Can't create '%s' under INBOX\n", name);
2952                 else
2953                         new_item->stype = stype;
2954         } else
2955                 new_item->stype = stype;
2956
2957         return new_item;
2958 }
2959
2960 static gchar *imap_folder_get_path(Folder *folder)
2961 {
2962         gchar *folder_path;
2963
2964         g_return_val_if_fail(folder != NULL, NULL);
2965         g_return_val_if_fail(folder->account != NULL, NULL);
2966
2967         folder_path = g_strconcat(get_imap_cache_dir(),
2968                                   G_DIR_SEPARATOR_S,
2969                                   folder->account->recv_server,
2970                                   G_DIR_SEPARATOR_S,
2971                                   folder->account->userid,
2972                                   NULL);
2973
2974         return folder_path;
2975 }
2976
2977 #ifdef G_OS_WIN32
2978 static gchar *imap_encode_unsafe_chars(const gchar *str)
2979 {
2980         gchar *ret = NULL, *o_ret;
2981         gchar *i;
2982         if (!str)
2983                 return NULL;
2984         ret = g_malloc(3*strlen(str)+1);
2985         o_ret = ret;
2986         for (i = str; *i; i++) {
2987                 switch(*i) {
2988                         case ':':
2989                         case '|':
2990                         case '<':
2991                         case '>':
2992                         case '*':
2993                         case '?':
2994                         case '#':
2995                                 *ret++ = '%';
2996                                 *ret++ = '0'+(*i/10);
2997                                 *ret++ = '0'+(*i%10);
2998                                 break;
2999                         default:
3000                                 *ret++ = *i;
3001                 }
3002         }
3003         *ret++ = '\0';
3004         return o_ret;
3005 }
3006 #endif
3007 static gchar *imap_item_get_path(Folder *folder, FolderItem *item)
3008 {
3009         gchar *folder_path, *path;
3010         gchar *item_path = NULL;
3011
3012         g_return_val_if_fail(folder != NULL, NULL);
3013         g_return_val_if_fail(item != NULL, NULL);
3014         folder_path = imap_folder_get_path(folder);
3015
3016         g_return_val_if_fail(folder_path != NULL, NULL);
3017
3018 #ifdef G_OS_UNIX
3019         item_path = g_strdup(item->path);
3020 #else
3021         item_path = imap_encode_unsafe_chars(item->path);
3022 #endif
3023
3024         if (g_path_is_absolute(folder_path)) {
3025                 if (item_path)
3026                         path = g_strconcat(folder_path, G_DIR_SEPARATOR_S,
3027                                            item_path, NULL);
3028                 else
3029                         path = g_strdup(folder_path);
3030         } else {
3031                 if (item_path)
3032                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
3033                                            folder_path, G_DIR_SEPARATOR_S,
3034                                            item_path, NULL);
3035                 else
3036                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
3037                                            folder_path, NULL);
3038         }
3039         g_free(folder_path);
3040         g_free(item_path);
3041 #ifdef G_OS_WIN32
3042         while (strchr(path, '/'))
3043                 *strchr(path, '/') = '\\';
3044 #endif
3045
3046         return path;
3047 }
3048
3049 static FolderItem *imap_create_folder(Folder *folder, FolderItem *parent,
3050                                const gchar *name)
3051 {
3052         gchar *dirpath, *imap_path;
3053         IMAPSession *session;
3054         FolderItem *new_item;
3055         gchar separator;
3056         gchar *new_name;
3057         const gchar *p;
3058         gint ok = MAILIMAP_NO_ERROR;
3059         gboolean no_select = FALSE, no_sub = FALSE;
3060         gboolean exist = FALSE;
3061
3062         g_return_val_if_fail(folder != NULL, NULL);
3063         g_return_val_if_fail(folder->account != NULL, NULL);
3064         g_return_val_if_fail(parent != NULL, NULL);
3065         g_return_val_if_fail(name != NULL, NULL);
3066
3067         debug_print("getting session...\n");
3068         session = imap_session_get(folder);
3069         if (!session) {
3070                 return NULL;
3071         }
3072
3073         if (!folder_item_parent(parent) && strcmp(name, "INBOX") == 0) {
3074                 dirpath = g_strdup(name);
3075         }else if (parent->path)
3076                 dirpath = g_strconcat(parent->path, "/", name, NULL);
3077         else if ((p = strchr(name, '/')) != NULL && *(p + 1) != '\0')
3078                 dirpath = g_strdup(name);
3079         else if (folder->account->imap_dir && *folder->account->imap_dir) {
3080                 gchar *imap_dir;
3081
3082                 Xstrdup_a(imap_dir, folder->account->imap_dir, {return NULL;});
3083                 strtailchomp(imap_dir, '/');
3084                 dirpath = g_strconcat(imap_dir, "/", name, NULL);
3085         } else
3086                 dirpath = g_strdup(name);
3087
3088
3089
3090         /* keep trailing directory separator to create a folder that contains
3091            sub folder */
3092         imap_path = imap_utf8_to_modified_utf7(dirpath, FALSE);
3093
3094         strtailchomp(dirpath, '/');
3095         Xstrdup_a(new_name, name, {
3096                 g_free(dirpath);
3097                 g_free(imap_path);
3098                 return NULL;});
3099
3100         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), imap_path, &ok);
3101         if (is_fatal(ok)) {
3102                 g_free(imap_path);
3103                 return NULL;
3104         }
3105         imap_path_separator_subst(imap_path, separator);
3106         /* remove trailing / for display */
3107         strtailchomp(new_name, '/');
3108
3109         if (strcmp(dirpath, "INBOX") != 0) {
3110                 GPtrArray *argbuf;
3111                 int r;
3112                 clist * lep_list;
3113
3114                 argbuf = g_ptr_array_new();
3115                 r = imap_threaded_list(folder, "", imap_path, &lep_list);
3116                 if (r != MAILIMAP_NO_ERROR) {
3117                         imap_handle_error(SESSION(session), NULL, r);
3118                         log_warning(LOG_PROTOCOL, _("can't create mailbox: LIST failed\n"));
3119                         g_free(imap_path);
3120                         g_free(dirpath);
3121                         ptr_array_free_strings(argbuf);
3122                         g_ptr_array_free(argbuf, TRUE);
3123                         return NULL;
3124                 }
3125
3126                 if (clist_count(lep_list) > 0)
3127                         exist = TRUE;
3128                 mailimap_list_result_free(lep_list);
3129                 lep_list = NULL;
3130                 if (!exist) {
3131                         ok = imap_cmd_create(session, imap_path);
3132                         if (ok != MAILIMAP_NO_ERROR) {
3133                                 log_warning(LOG_PROTOCOL, _("can't create mailbox\n"));
3134                                 g_free(imap_path);
3135                                 g_free(dirpath);
3136                                 return NULL;
3137                         }
3138                         r = imap_threaded_list(folder, "", imap_path, &lep_list);
3139                         if (r == MAILIMAP_NO_ERROR) {
3140                                 GSList *item_list = imap_list_from_lep(IMAP_FOLDER(folder),
3141                                                lep_list, dirpath, TRUE);
3142                                 if (item_list) {
3143                                         FolderItem *cur_item = FOLDER_ITEM(item_list->data);
3144                                         no_select = cur_item->no_select;
3145                                         no_sub = cur_item->no_sub;
3146                                         g_slist_free(item_list);
3147                                 }
3148                                 mailimap_list_result_free(lep_list);
3149                         } else {
3150                                 imap_handle_error(SESSION(session), NULL, r);
3151                         }
3152                 }
3153                 imap_threaded_subscribe(folder, imap_path, TRUE);
3154         } else {
3155                 clist *lep_list;
3156                 int r;
3157                 /* just get flags */
3158                 r = imap_threaded_list(folder, "", "INBOX", &lep_list);
3159                 if (r == MAILIMAP_NO_ERROR) {
3160                         GSList *item_list = imap_list_from_lep(IMAP_FOLDER(folder),
3161                                        lep_list, dirpath, TRUE);
3162                         if (item_list) {
3163                                 FolderItem *cur_item = FOLDER_ITEM(item_list->data);
3164                                 no_select = cur_item->no_select;
3165                                 no_sub = cur_item->no_sub;
3166                                 g_slist_free(item_list);
3167                         }
3168                         mailimap_list_result_free(lep_list);
3169                 } else {
3170                         imap_handle_error(SESSION(session), NULL, r);
3171                 }
3172         }
3173
3174         new_item = folder_item_new(folder, new_name, dirpath);
3175         new_item->no_select = no_select;
3176         new_item->no_sub = no_sub;
3177         folder_item_append(parent, new_item);
3178         g_free(imap_path);
3179         g_free(dirpath);
3180
3181         dirpath = folder_item_get_path(new_item);
3182         if (!is_dir_exist(dirpath))
3183                 make_dir_hier(dirpath);
3184         g_free(dirpath);
3185
3186         if (exist) {
3187                 /* folder existed, scan it */
3188                 imap_scan_required(folder, new_item);
3189                 folder_item_scan_full(new_item, FALSE);
3190         }
3191
3192         return new_item;
3193 }
3194
3195 static gint imap_rename_folder(Folder *folder, FolderItem *item,
3196                                const gchar *name)
3197 {
3198         gchar *dirpath;
3199         gchar *newpath;
3200         gchar *real_oldpath;
3201         gchar *real_newpath;
3202         gchar *paths[2];
3203         gchar *old_cache_dir;
3204         gchar *new_cache_dir;
3205         IMAPSession *session;
3206         gchar separator;
3207         gint ok = MAILIMAP_NO_ERROR;
3208         gint exists, recent, unseen;
3209         guint32 uid_validity;
3210
3211         g_return_val_if_fail(folder != NULL, -1);
3212         g_return_val_if_fail(item != NULL, -1);
3213         g_return_val_if_fail(item->path != NULL, -1);
3214         g_return_val_if_fail(name != NULL, -1);
3215
3216         debug_print("getting session...\n");
3217         session = imap_session_get(folder);
3218         if (!session) {
3219                 return -1;
3220         }
3221
3222         if (strchr(name, imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &ok)) != NULL ||
3223                 is_fatal(ok)) {
3224                 g_warning(_("New folder name must not contain the namespace "
3225                             "path separator"));
3226                 return -1;
3227         }
3228
3229         real_oldpath = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &ok);
3230         if (is_fatal(ok)) {
3231                 return -1;
3232         }
3233
3234         g_free(session->mbox);
3235         session->mbox = NULL;
3236         session->exists = 0;
3237         session->recent = 0;
3238         session->expunge = 0;
3239         ok = imap_cmd_examine(session, "INBOX",
3240                               &exists, &recent, &unseen, &uid_validity, FALSE);
3241         if (ok != MAILIMAP_NO_ERROR) {
3242                 g_free(real_oldpath);
3243                 return -1;
3244         }
3245
3246         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &ok);
3247         if (is_fatal(ok))
3248                 return -1;
3249         if (strchr(item->path, G_DIR_SEPARATOR)) {
3250                 dirpath = g_path_get_dirname(item->path);
3251                 newpath = g_strconcat(dirpath, G_DIR_SEPARATOR_S, name, NULL);
3252                 g_free(dirpath);
3253         } else
3254                 newpath = g_strdup(name);
3255
3256         real_newpath = imap_utf8_to_modified_utf7(newpath, FALSE);
3257         imap_path_separator_subst(real_newpath, separator);
3258
3259         ok = imap_cmd_rename(session, real_oldpath, real_newpath);
3260         if (ok != MAILIMAP_NO_ERROR) {
3261                 log_warning(LOG_PROTOCOL, _("can't rename mailbox: %s to %s\n"),
3262                             real_oldpath, real_newpath);
3263                 g_free(real_oldpath);
3264                 g_free(newpath);
3265                 g_free(real_newpath);
3266                 return -1;
3267         }
3268         g_free(item->name);
3269         item->name = g_strdup(name);
3270
3271         old_cache_dir = folder_item_get_path(item);
3272
3273         paths[0] = g_strdup(item->path);
3274         paths[1] = newpath;
3275         g_node_traverse(item->node, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
3276                         imap_rename_folder_func, paths);
3277
3278         if (is_dir_exist(old_cache_dir)) {
3279                 new_cache_dir = folder_item_get_path(item);
3280                 if (g_rename(old_cache_dir, new_cache_dir) < 0) {
3281                         FILE_OP_ERROR(old_cache_dir, "rename");
3282                 }
3283                 g_free(new_cache_dir);
3284         }
3285
3286         g_free(old_cache_dir);
3287         g_free(paths[0]);
3288         g_free(newpath);
3289         g_free(real_oldpath);
3290         g_free(real_newpath);
3291         return 0;
3292 }
3293
3294 gint imap_subscribe(Folder *folder, FolderItem *item, gchar *rpath, gboolean sub)
3295 {
3296         gchar *path;
3297         gint r = MAILIMAP_NO_ERROR;
3298         IMAPSession *session;
3299         debug_print("getting session...\n");
3300
3301         session = imap_session_get(folder);
3302         if (!session) {
3303                 return -1;
3304         }
3305         if (item && item->path) {
3306                 path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &r);
3307                 if (!path)
3308                         return -1;
3309                 if (is_fatal(r)) {
3310                         g_free(path);
3311                         return -1;
3312                 }
3313                 if (!strcmp(path, "INBOX") && sub == FALSE) {
3314                         g_free(path);
3315                         return -1;
3316                 }
3317                 debug_print("%ssubscribing %s\n", sub?"":"un", path);
3318                 r = imap_threaded_subscribe(folder, path, sub);
3319                 g_free(path);
3320         } else if (rpath) {
3321                 r = imap_threaded_subscribe(folder, rpath, sub);
3322         } else
3323                 return -1;
3324         return r;
3325 }
3326
3327 static gint imap_remove_folder_real(Folder *folder, FolderItem *item)
3328 {
3329         gint ok = MAILIMAP_NO_ERROR;
3330         IMAPSession *session;
3331         gchar *path;
3332         gchar *cache_dir;
3333         gboolean selected_folder;
3334
3335         g_return_val_if_fail(folder != NULL, -1);
3336         g_return_val_if_fail(item != NULL, -1);
3337         g_return_val_if_fail(item->path != NULL, -1);
3338
3339         debug_print("getting session...\n");
3340         session = imap_session_get(folder);
3341         if (!session) {
3342                 return -1;
3343         }
3344         path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &ok);
3345         if (is_fatal(ok))
3346                 return -1;
3347
3348         imap_threaded_subscribe(folder, path, FALSE);
3349
3350         selected_folder = (session->mbox != NULL) &&
3351                           (!strcmp(session->mbox, item->path));
3352         if (selected_folder) {
3353                 ok = imap_cmd_close(session);
3354                 if (ok != MAILIMAP_NO_ERROR) {
3355                         debug_print("close err %d\n", ok);
3356                         return ok;
3357                 }
3358         }
3359         ok = imap_cmd_delete(session, path);
3360         if (ok != MAILIMAP_NO_ERROR && !is_fatal(ok)) {
3361                 gchar *tmp = NULL;
3362
3363                 ok = MAILIMAP_NO_ERROR;
3364                 tmp = g_strdup_printf("%s%c", path,
3365                                 imap_get_path_separator(session, IMAP_FOLDER(folder), path, &ok));
3366                 g_free(path);
3367                 path = tmp;
3368                 if (!is_fatal(ok))
3369                         ok = imap_cmd_delete(session, path);
3370         }
3371
3372         if (ok != MAILIMAP_NO_ERROR) {
3373                 log_warning(LOG_PROTOCOL, _("can't delete mailbox\n"));
3374                 g_free(path);
3375                 return -1;
3376         }
3377
3378         g_free(path);
3379         cache_dir = folder_item_get_path(item);
3380         if (is_dir_exist(cache_dir) && remove_dir_recursive(cache_dir) < 0)
3381                 g_warning("can't remove directory '%s'\n", cache_dir);
3382         g_free(cache_dir);
3383         folder_item_remove(item);
3384         return 0;
3385 }
3386
3387 static gint imap_remove_folder(Folder *folder, FolderItem *item)
3388 {
3389         GNode *node, *next;
3390
3391         g_return_val_if_fail(item != NULL, -1);
3392         g_return_val_if_fail(item->folder != NULL, -1);
3393         g_return_val_if_fail(item->node != NULL, -1);
3394
3395         node = item->node->children;
3396         while (node != NULL) {
3397                 next = node->next;
3398                 if (imap_remove_folder(folder, FOLDER_ITEM(node->data)) < 0)
3399                         return -1;
3400                 node = next;
3401         }
3402         debug_print("IMAP removing %s\n", item->path);
3403
3404         if (imap_remove_all_msg(folder, item) < 0)
3405                 return -1;
3406         return imap_remove_folder_real(folder, item);
3407 }
3408
3409 typedef struct _uncached_data {
3410         IMAPSession *session;
3411         FolderItem *item;
3412         MsgNumberList *numlist;
3413         guint cur;
3414         guint total;
3415         gboolean done;
3416         int ok;
3417 } uncached_data;
3418
3419 static void *imap_get_uncached_messages_thread(void *data)
3420 {
3421         uncached_data *stuff = (uncached_data *)data;
3422         IMAPSession *session = stuff->session;
3423         FolderItem *item = stuff->item;
3424         MsgNumberList *numlist = stuff->numlist;
3425         GSList *newlist = NULL;
3426         GSList *llast = NULL;
3427         GSList *seq_list, *cur;
3428         gboolean got_alien_tags = FALSE;
3429
3430         debug_print("uncached_messages\n");
3431
3432         if (session == NULL || item == NULL || item->folder == NULL
3433             || FOLDER_CLASS(item->folder) != &imap_class) {
3434                 stuff->done = TRUE;
3435                 return NULL;
3436         }
3437
3438         seq_list = imap_get_lep_set_from_numlist(IMAP_FOLDER(item->folder), numlist);
3439         debug_print("get msgs info\n");
3440         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
3441                 struct mailimap_set * imapset;
3442                 unsigned int i;
3443                 int r;
3444                 carray * env_list;
3445                 int count;
3446
3447                 if (session->cancelled)
3448                         break;
3449
3450                 imapset = cur->data;
3451
3452                 r = imap_threaded_fetch_env(session->folder,
3453                                             imapset, &env_list);
3454                 if (r != MAILIMAP_NO_ERROR) {
3455                         imap_handle_error(SESSION(session), NULL, r);
3456                         if (is_fatal(r)) {
3457                                 stuff->ok = r;
3458                                 return NULL;
3459                         }
3460                         continue;
3461                 }
3462
3463                 session_set_access_time(SESSION(session));
3464
3465                 count = 0;
3466                 for(i = 0 ; i < carray_count(env_list) ; i += 2) {
3467                         struct imap_fetch_env_info * info;
3468                         MsgInfo * msginfo;
3469                         GSList *tags = NULL, *cur = NULL;
3470                         info = carray_get(env_list, i);
3471                         tags = carray_get(env_list, i+1);
3472                         msginfo = imap_envelope_from_lep(info, item);
3473                         if (msginfo == NULL) {
3474                                 slist_free_strings_full(tags);
3475                                 continue;
3476                         }
3477                         g_slist_free(msginfo->tags);
3478                         msginfo->tags = NULL;
3479
3480                         for (cur = tags; cur; cur = cur->next) {
3481                                 gchar *real_tag = imap_modified_utf7_to_utf8(cur->data, TRUE);
3482                                 gint id = 0;
3483                                 id = tags_get_id_for_str(real_tag);
3484                                 if (id == -1) {
3485                                         id = tags_add_tag(real_tag);
3486                                         got_alien_tags = TRUE;
3487                                 }
3488                                 if (!g_slist_find(msginfo->tags, GINT_TO_POINTER(id))) {
3489                                         msginfo->tags = g_slist_prepend(
3490                                                         msginfo->tags,
3491                                                         GINT_TO_POINTER(id));
3492                                 }
3493                                 g_free(real_tag);
3494                         }
3495                         if (msginfo->tags)
3496                                 msginfo->tags = g_slist_reverse(msginfo->tags);
3497                         slist_free_strings_full(tags);
3498                         msginfo->folder = item;
3499                         if (!newlist)
3500                                 llast = newlist = g_slist_append(newlist, msginfo);
3501                         else {
3502                                 llast = g_slist_append(llast, msginfo);
3503                                 llast = llast->next;
3504                         }
3505                         count ++;
3506                 }
3507
3508                 imap_fetch_env_free(env_list);
3509         }
3510
3511         if (got_alien_tags) {
3512                 tags_write_tags();
3513                 main_window_reflect_tags_changes(mainwindow_get_mainwindow());
3514         }
3515
3516         imap_lep_set_free(seq_list);
3517
3518         session_set_access_time(SESSION(session));
3519         stuff->done = TRUE;
3520         return newlist;
3521 }
3522
3523 #define MAX_MSG_NUM 50
3524
3525 static GSList *imap_get_uncached_messages(IMAPSession *session,
3526                                         FolderItem *item,
3527                                         MsgNumberList *numlist,
3528                                         int *r)
3529 {
3530         GSList *result = NULL;
3531         GSList * cur;
3532         uncached_data *data = g_new0(uncached_data, 1);
3533
3534         cur = numlist;
3535         data->total = g_slist_length(numlist);
3536         data->ok = MAILIMAP_NO_ERROR;
3537         debug_print("messages list : %i\n", data->total);
3538
3539         while (cur != NULL) {
3540                 GSList * partial_result;
3541                 int count;
3542                 GSList * newlist;
3543                 GSList * llast;
3544
3545                 llast = NULL;
3546                 count = 0;
3547                 newlist = NULL;
3548                 while (count < MAX_MSG_NUM) {
3549                         void * p;
3550
3551                         p = cur->data;
3552
3553                         if (newlist == NULL)
3554                                 llast = newlist = g_slist_append(newlist, p);
3555                         else {
3556                                 llast = g_slist_append(llast, p);
3557                                 llast = llast->next;
3558                         }
3559                         count ++;
3560
3561                         cur = cur->next;
3562                         if (cur == NULL)
3563                                 break;
3564                 }
3565
3566                 data->done = FALSE;
3567                 data->session = session;
3568                 data->item = item;
3569                 data->numlist = newlist;
3570                 data->cur += count;
3571
3572                 if (prefs_common.work_offline &&
3573                     !inc_offline_should_override(FALSE,
3574                         _("Claws Mail needs network access in order "
3575                           "to access the IMAP server."))) {
3576                         g_free(data);
3577                         return NULL;
3578                 }
3579
3580                 partial_result =
3581                         (GSList *)imap_get_uncached_messages_thread(data);
3582                 *r = data->ok;
3583                 if (data->ok != MAILIMAP_NO_ERROR) {
3584                         goto bail;
3585                 }
3586                 statusbar_progress_all(data->cur,data->total, 1);
3587
3588                 g_slist_free(newlist);
3589
3590                 result = g_slist_concat(result, partial_result);
3591         }
3592 bail:
3593         g_free(data);
3594
3595         statusbar_progress_all(0,0,0);
3596         statusbar_pop_all();
3597
3598         return result;
3599 }
3600
3601 static void imap_delete_all_cached_messages(FolderItem *item)
3602 {
3603         gchar *dir;
3604
3605         g_return_if_fail(item != NULL);
3606         g_return_if_fail(item->folder != NULL);
3607         g_return_if_fail(FOLDER_CLASS(item->folder) == &imap_class);
3608
3609         debug_print("Deleting all cached messages...\n");
3610
3611         dir = folder_item_get_path(item);
3612         if (is_dir_exist(dir))
3613                 remove_all_numbered_files(dir);
3614         g_free(dir);
3615
3616         debug_print("done.\n");
3617 }
3618
3619 gchar imap_get_path_separator_for_item(FolderItem *item)
3620 {
3621         Folder *folder = NULL;
3622         IMAPFolder *imap_folder = NULL;
3623         IMAPSession *session = NULL;
3624         gchar result = '/';
3625         gint ok = MAILIMAP_NO_ERROR;
3626         if (!item)
3627                 return '/';
3628         folder = item->folder;
3629
3630         if (!folder)
3631                 return '/';
3632
3633         imap_folder = IMAP_FOLDER(folder);
3634
3635         if (!imap_folder)
3636                 return '/';
3637
3638         debug_print("getting session...");
3639         session = imap_session_get(FOLDER(folder));
3640         result = imap_get_path_separator(session, imap_folder, item->path, &ok);
3641         return result;
3642 }
3643
3644 static gchar imap_refresh_path_separator(IMAPSession *session, IMAPFolder *folder, const gchar *subfolder, gint *ok)
3645 {
3646         clist * lep_list;
3647         int r;
3648         gchar separator = '\0';
3649
3650         g_return_val_if_fail(session != NULL, '/');
3651         r = imap_threaded_list((Folder *)folder, "", subfolder, &lep_list);
3652
3653         if (r != MAILIMAP_NO_ERROR) {
3654                 imap_handle_error(SESSION(session), NULL, r);
3655                 log_warning(LOG_PROTOCOL, _("LIST failed\n"));
3656                 *ok = r;
3657                 return '\0';
3658         }
3659
3660         if (lep_list != NULL && clist_count(lep_list) > 0) {
3661                 clistiter * iter = clist_begin(lep_list);
3662                 struct mailimap_mailbox_list * mb;
3663                 mb = clist_content(iter);
3664
3665                 separator = mb->mb_delimiter;
3666                 debug_print("got separator: %c\n", folder->last_seen_separator);
3667         }
3668         *ok = MAILIMAP_NO_ERROR;
3669         mailimap_list_result_free(lep_list);
3670         return separator;
3671 }
3672
3673 static gchar imap_get_path_separator(IMAPSession *session, IMAPFolder *folder, const gchar *path, gint *ok)
3674 {
3675         gchar separator = '/';
3676         *ok = MAILIMAP_NO_ERROR;
3677         if (folder->last_seen_separator == 0) {
3678                 folder->last_seen_separator = imap_refresh_path_separator(session, folder, "", ok);
3679         }
3680
3681         if (folder->last_seen_separator == 0) {
3682                 folder->last_seen_separator = imap_refresh_path_separator(session, folder, "INBOX", ok);
3683         }
3684
3685         if (folder->last_seen_separator != 0) {
3686                 debug_print("using separator: %c\n", folder->last_seen_separator);
3687                 return folder->last_seen_separator;
3688         }
3689
3690         return separator;
3691 }
3692
3693 static gchar *imap_get_real_path(IMAPSession *session, IMAPFolder *folder, const gchar *path, gint *ok)
3694 {
3695         gchar *real_path = NULL;
3696         gchar separator;
3697
3698         g_return_val_if_fail(folder != NULL, NULL);
3699         g_return_val_if_fail(path != NULL, NULL);
3700
3701         *ok = MAILIMAP_NO_ERROR;
3702
3703         real_path = imap_utf8_to_modified_utf7(path, FALSE);
3704         separator = imap_get_path_separator(session, folder, path, ok);
3705         if (*ok == MAILIMAP_NO_ERROR)
3706                 imap_path_separator_subst(real_path, separator);
3707
3708         return real_path;
3709 }
3710
3711 static gint imap_set_message_flags(IMAPSession *session,
3712                                    IMAPFolderItem *item,
3713                                    MsgNumberList *numlist,
3714                                    IMAPFlags flags,
3715                                    GSList *tags,
3716                                    gboolean is_set)
3717 {
3718         gint ok = 0;
3719         GSList *seq_list;
3720         GSList * cur;
3721         gint total = 0;
3722         IMAPFolder *folder = NULL;
3723         GSList *sorted_list = NULL;
3724
3725         if (numlist == NULL || session == NULL)
3726                 return MAILIMAP_ERROR_BAD_STATE;
3727
3728         folder = IMAP_FOLDER(session->folder);
3729
3730         sorted_list = g_slist_copy(numlist);
3731         sorted_list = g_slist_sort(sorted_list, g_int_compare);
3732
3733         cur = g_slist_last(sorted_list);
3734
3735         if (cur)
3736                 total = GPOINTER_TO_INT(cur->data);
3737
3738         seq_list = imap_get_lep_set_from_numlist(IMAP_FOLDER(session->folder), sorted_list);
3739
3740         statusbar_print_all(_("Flagging messages..."));
3741
3742         for(cur = seq_list ; cur != NULL ; cur = g_slist_next(cur)) {
3743                 struct mailimap_set * imapset = (struct mailimap_set *)cur->data;
3744                 struct mailimap_set_item *set_item = NULL;
3745
3746                 if (imapset->set_list)
3747                         set_item = clist_content(clist_begin(imapset->set_list));
3748                 else
3749                         continue;
3750
3751                 if (set_item == NULL)
3752                         continue;
3753
3754                 statusbar_progress_all(set_item->set_first, total, 1);
3755
3756                 ok = imap_cmd_store(session, item, imapset,
3757                                     flags, tags, is_set);
3758                 statusbar_progress_all(set_item->set_last, total, 1);
3759                 if (ok != MAILIMAP_NO_ERROR && folder->max_set_size > 20) {
3760                         /* reduce max set size */
3761                         folder->max_set_size /= 2;
3762                 }
3763                 if (ok != MAILIMAP_NO_ERROR && is_fatal(ok)) {
3764                         break;
3765                 }
3766         }
3767
3768         g_slist_free(sorted_list);
3769
3770         statusbar_progress_all(0,0,0);
3771         statusbar_pop_all();
3772
3773         imap_lep_set_free(seq_list);
3774
3775         return ok;
3776 }
3777
3778 typedef struct _select_data {
3779         IMAPSession *session;
3780         gchar *real_path;
3781         gint *exists;
3782         gint *recent;
3783         gint *unseen;
3784         guint32 *uid_validity;
3785         gboolean done;
3786 } select_data;
3787
3788 static gint imap_select(IMAPSession *session, IMAPFolder *folder,
3789                         FolderItem *item,
3790                         gint *exists, gint *recent, gint *unseen,
3791                         guint32 *uid_validity, gint *can_create_flags,
3792                         gboolean block)
3793 {
3794         gchar *real_path;
3795         gint ok = MAILIMAP_NO_ERROR;
3796         gint exists_, recent_, unseen_;
3797         guint32 uid_validity_;
3798         gint can_create_flags_;
3799         const gchar *path = item ? item->path:NULL;
3800
3801         if (!item) {
3802                 return MAILIMAP_ERROR_BAD_STATE;
3803         }
3804
3805         if (!exists && !recent && !unseen && !uid_validity && !can_create_flags) {
3806                 if (session->mbox && strcmp(session->mbox, path) == 0)
3807                         return MAILIMAP_NO_ERROR;
3808         }
3809         if (!exists && !recent && !unseen && !uid_validity && can_create_flags) {
3810                 if (session->mbox && strcmp(session->mbox, path) == 0) {
3811                         if (IMAP_FOLDER_ITEM(item)->can_create_flags != ITEM_CAN_CREATE_FLAGS_UNKNOWN)
3812                                 return MAILIMAP_NO_ERROR;
3813                 }
3814         }
3815         if (!exists)
3816                 exists = &exists_;
3817         if (!recent)
3818                 recent = &recent_;
3819         if (!unseen)
3820                 unseen = &unseen_;
3821         if (!uid_validity)
3822                 uid_validity = &uid_validity_;
3823         if (!can_create_flags)
3824                 can_create_flags = &can_create_flags_;
3825
3826         g_free(session->mbox);
3827         session->mbox = NULL;
3828         session->exists = 0;
3829         session->recent = 0;
3830         session->expunge = 0;
3831
3832         real_path = imap_get_real_path(session, folder, path, &ok);
3833         if (is_fatal(ok))
3834                 return ok;
3835         g_slist_free(IMAP_FOLDER_ITEM(item)->ok_flags);
3836         IMAP_FOLDER_ITEM(item)->ok_flags = NULL;
3837         ok = imap_cmd_select(session, real_path,
3838                              exists, recent, unseen, uid_validity, can_create_flags,
3839                              &(IMAP_FOLDER_ITEM(item)->ok_flags), block);
3840         if (ok != MAILIMAP_NO_ERROR) {
3841                 log_warning(LOG_PROTOCOL, _("can't select folder: %s\n"), real_path);
3842         } else {
3843                 session->mbox = g_strdup(path);
3844                 session->folder_content_changed = FALSE;
3845                 session->exists = *exists;
3846                 session->recent = *recent;
3847                 session->expunge = 0;
3848                 session->unseen = *unseen;
3849                 session->uid_validity = *uid_validity;
3850                 debug_print("select: exists %d recent %d expunge %d uid_validity %d can_create_flags %d\n",
3851                         session->exists, session->recent, session->expunge,
3852                         session->uid_validity, *can_create_flags);
3853         }
3854         if (*can_create_flags) {
3855                 IMAP_FOLDER_ITEM(item)->can_create_flags = ITEM_CAN_CREATE_FLAGS;
3856         } else {
3857                 IMAP_FOLDER_ITEM(item)->can_create_flags = ITEM_CANNOT_CREATE_FLAGS;
3858         }
3859         g_free(real_path);
3860
3861         return ok;
3862 }
3863
3864 static gint imap_status(IMAPSession *session, IMAPFolder *folder,
3865                         const gchar *path, IMAPFolderItem *item,
3866                         gint *messages,
3867                         guint32 *uid_next, guint32 *uid_validity,
3868                         gint *unseen, gboolean block)
3869 {
3870         int r = MAILIMAP_NO_ERROR;
3871         clistiter * iter;
3872         struct mailimap_mailbox_data_status * data_status;
3873         int got_values;
3874         gchar *real_path;
3875         guint mask = 0;
3876
3877         real_path = imap_get_real_path(session, folder, path, &r);
3878         if (is_fatal(r)) {
3879                 g_free(real_path);
3880                 return r;
3881         }
3882         if (messages) {
3883                 mask |= 1 << 0;
3884                 *messages = 0;
3885         }
3886         if (uid_next) {
3887                 mask |= 1 << 2;
3888                 *uid_next = 0;
3889         }
3890         if (uid_validity) {
3891                 mask |= 1 << 3;
3892                 *uid_validity = 0;
3893         }
3894         if (unseen) {
3895                 mask |= 1 << 4;
3896                 *unseen = 0;
3897         }
3898
3899         if (session->mbox != NULL &&
3900             !strcmp(session->mbox, item->item.path)) {
3901                 r = imap_cmd_close(session);
3902                 if (r != MAILIMAP_NO_ERROR) {
3903                         debug_print("close err %d\n", r);
3904                         g_free(real_path);
3905                         return r;
3906                 }
3907         }
3908
3909         r = imap_threaded_status(FOLDER(folder), real_path,
3910                 &data_status, mask);
3911
3912         g_free(real_path);
3913         if (r != MAILIMAP_NO_ERROR) {
3914                 imap_handle_error(SESSION(session), NULL, r);
3915                 debug_print("status err %d\n", r);
3916                 return r;
3917         }
3918
3919         if (data_status == NULL || data_status->st_info_list == NULL) {
3920                 debug_print("data_status %p\n", data_status);
3921                 if (data_status) {
3922                         debug_print("data_status->st_info_list %p\n", data_status->st_info_list);
3923                         mailimap_mailbox_data_status_free(data_status);
3924                 }
3925                 return MAILIMAP_ERROR_BAD_STATE;
3926         }
3927
3928         got_values = 0;
3929         if (data_status->st_info_list) {
3930                 for(iter = clist_begin(data_status->st_info_list) ; iter != NULL ;
3931                     iter = clist_next(iter)) {
3932                         struct mailimap_status_info * info;
3933
3934                         info = clist_content(iter);
3935                         switch (info->st_att) {
3936                         case MAILIMAP_STATUS_ATT_MESSAGES:
3937                                 if (messages) {
3938                                         * messages = info->st_value;
3939                                         got_values |= 1 << 0;
3940                                 }
3941                                 break;
3942
3943                         case MAILIMAP_STATUS_ATT_UIDNEXT:
3944                                 if (uid_next) {
3945                                         * uid_next = info->st_value;
3946                                         got_values |= 1 << 2;
3947                                 }
3948                                 break;
3949
3950                         case MAILIMAP_STATUS_ATT_UIDVALIDITY:
3951                                 if (uid_validity) {
3952                                         * uid_validity = info->st_value;
3953                                         got_values |= 1 << 3;
3954                                 }
3955                                 break;
3956
3957                         case MAILIMAP_STATUS_ATT_UNSEEN:
3958                                 if (unseen) {
3959                                         * unseen = info->st_value;
3960                                         got_values |= 1 << 4;
3961                                 }
3962                                 break;
3963                         }
3964                 }
3965         }
3966         mailimap_mailbox_data_status_free(data_status);
3967
3968         if (got_values != mask) {
3969                 g_warning("status: incomplete values received (%d)\n", got_values);
3970         }
3971         return MAILIMAP_NO_ERROR;
3972 }
3973
3974 static void imap_free_capabilities(IMAPSession *session)
3975 {
3976         slist_free_strings_full(session->capability);
3977         session->capability = NULL;
3978 }
3979
3980 /* low-level IMAP4rev1 commands */
3981
3982 static gint imap_cmd_login(IMAPSession *session,
3983                            const gchar *user, const gchar *pass,
3984                            const gchar *type)
3985 {
3986         int r;
3987         gint ok;
3988
3989         if (!strcmp(type, "LOGIN") && imap_has_capability(session, "LOGINDISABLED")) {
3990                 gint ok = MAILIMAP_ERROR_BAD_STATE;
3991                 if (imap_has_capability(session, "STARTTLS")) {
3992 #ifdef USE_GNUTLS
3993                         log_warning(LOG_PROTOCOL, _("Server requires TLS to log in.\n"));
3994                         ok = imap_cmd_starttls(session);
3995                         if (ok != MAILIMAP_NO_ERROR) {
3996                                 log_warning(LOG_PROTOCOL, _("Can't start TLS session.\n"));
3997                                 return ok;
3998                         } else {
3999                                 /* refresh capas */
4000                                 imap_free_capabilities(session);
4001                                 if ((r = imap_get_capabilities(session)) != MAILIMAP_NO_ERROR) {
4002                                         imap_handle_error(SESSION(session), NULL, r);
4003                                         log_warning(LOG_PROTOCOL, _("Can't refresh capabilities.\n"));
4004                                         return r;
4005                                 }
4006                         }
4007 #else
4008                         log_error(LOG_PROTOCOL, _("Connection to %s failed: "
4009                                         "server requires TLS, but Claws Mail "
4010                                         "has been compiled without OpenSSL "
4011                                         "support.\n"),
4012                                         SESSION(session)->server);
4013                         return MAILIMAP_ERROR_LOGIN;
4014 #endif
4015                 } else {
4016                         log_error(LOG_PROTOCOL, _("Server logins are disabled.\n"));
4017                         return MAILIMAP_ERROR_LOGIN;
4018                 }
4019         }
4020
4021         log_print(LOG_PROTOCOL, "IMAP4> Logging %s to %s using %s\n",
4022                         user,
4023                         SESSION(session)->server,
4024                         type);
4025         r = imap_threaded_login(session->folder, user, pass, type);
4026         if (r != MAILIMAP_NO_ERROR) {
4027                 imap_handle_error(SESSION(session), NULL, r);
4028                 log_print(LOG_PROTOCOL, "IMAP4< Error logging in to %s\n",
4029                                 SESSION(session)->server);
4030                 ok = r;
4031         } else {
4032                 log_print(LOG_PROTOCOL, "IMAP4< Login to %s successful\n",
4033                                 SESSION(session)->server);
4034                 ok = MAILIMAP_NO_ERROR;
4035         }
4036         return ok;
4037 }
4038
4039 static gint imap_cmd_noop(IMAPSession *session)
4040 {
4041         int r;
4042         unsigned int exists, recent, expunge, unseen, uidnext, uidval;
4043
4044         r = imap_threaded_noop(session->folder, &exists, &recent, &expunge, &unseen, &uidnext, &uidval);
4045         if (r != MAILIMAP_NO_ERROR) {
4046                 imap_handle_error(SESSION(session), NULL, r);
4047                 debug_print("noop err %d\n", r);
4048                 return r;
4049         }
4050
4051         if ((exists && exists != session->exists)
4052          || (recent && recent != session->recent)
4053          || (expunge && expunge != session->expunge)
4054          || (unseen && unseen != session->unseen)) {
4055                 session->folder_content_changed = TRUE;
4056         }
4057         if (uidnext != 0 && uidnext != session->uid_next) {
4058                 session->uid_next = uidnext;
4059                 session->folder_content_changed = TRUE;
4060         }
4061         if (uidval != 0 && uidval != session->uid_validity) {
4062                 session->uid_validity = uidval;
4063                 session->folder_content_changed = TRUE;
4064         }
4065
4066         session->exists = exists;
4067         session->recent = recent;
4068         session->expunge = expunge;
4069         session->unseen = unseen;
4070
4071         session_set_access_time(SESSION(session));
4072
4073         return MAILIMAP_NO_ERROR;
4074 }
4075
4076 #ifdef USE_GNUTLS
4077 static gint imap_cmd_starttls(IMAPSession *session)
4078 {
4079         int r;
4080
4081         r = imap_threaded_starttls(session->folder,
4082                 SESSION(session)->server, SESSION(session)->port);
4083         if (r != MAILIMAP_NO_ERROR) {
4084                 imap_handle_error(SESSION(session), NULL, r);
4085                 debug_print("starttls err %d\n", r);
4086                 return r;
4087         }
4088         return MAILIMAP_NO_ERROR;
4089 }
4090 #endif
4091
4092 static gint imap_cmd_select(IMAPSession *session, const gchar *folder,
4093                             gint *exists, gint *recent, gint *unseen,
4094                             guint32 *uid_validity, gint *can_create_flags,
4095                             GSList **ok_flags, gboolean block)
4096 {
4097         int r;
4098
4099         r = imap_threaded_select(session->folder, folder,
4100                                  exists, recent, unseen, uid_validity, can_create_flags, ok_flags);
4101         if (r != MAILIMAP_NO_ERROR) {
4102                 imap_handle_error(SESSION(session), NULL, r);
4103                 debug_print("select err %d\n", r);
4104                 return r;
4105         }
4106         return MAILIMAP_NO_ERROR;
4107 }
4108
4109 static gint imap_cmd_close(IMAPSession *session)
4110 {
4111         int r;
4112
4113         r = imap_threaded_close(session->folder);
4114         if (r != MAILIMAP_NO_ERROR) {
4115                 imap_handle_error(SESSION(session), NULL, r);
4116                 debug_print("close err %d\n", r);
4117                 return r;
4118         }
4119         g_free(session->mbox);
4120         session->mbox = NULL;
4121         session->exists = 0;
4122         session->recent = 0;
4123         session->expunge = 0;
4124         return MAILIMAP_NO_ERROR;
4125 }
4126
4127 static gint imap_cmd_examine(IMAPSession *session, const gchar *folder,
4128                              gint *exists, gint *recent, gint *unseen,
4129                              guint32 *uid_validity, gboolean block)
4130 {
4131         int r;
4132
4133         r = imap_threaded_examine(session->folder, folder,
4134                                   exists, recent, unseen, uid_validity);
4135         if (r != MAILIMAP_NO_ERROR) {
4136                 imap_handle_error(SESSION(session), NULL, r);
4137                 debug_print("examine err %d\n", r);
4138
4139                 return r;
4140         }
4141         return MAILIMAP_NO_ERROR;
4142 }
4143
4144 static gint imap_cmd_create(IMAPSession *session, const gchar *folder)
4145 {
4146         int r;
4147
4148         r = imap_threaded_create(session->folder, folder);
4149         if (r != MAILIMAP_NO_ERROR) {
4150                 imap_handle_error(SESSION(session), NULL, r);
4151                 return r;
4152         }
4153
4154         return MAILIMAP_NO_ERROR;
4155 }
4156
4157 static gint imap_cmd_rename(IMAPSession *session, const gchar *old_folder,
4158                             const gchar *new_folder)
4159 {
4160         int r;
4161
4162         r = imap_threaded_rename(session->folder, old_folder,
4163                                  new_folder);
4164         if (r != MAILIMAP_NO_ERROR) {
4165                 imap_handle_error(SESSION(session), NULL, r);
4166                 return r;
4167         }
4168
4169         return MAILIMAP_NO_ERROR;
4170 }
4171
4172 static gint imap_cmd_delete(IMAPSession *session, const gchar *folder)
4173 {
4174         int r;
4175
4176
4177         r = imap_threaded_delete(session->folder, folder);
4178         if (r != MAILIMAP_NO_ERROR) {
4179                 imap_handle_error(SESSION(session), NULL, r);
4180                 return r;
4181         }
4182
4183         return MAILIMAP_NO_ERROR;
4184 }
4185
4186 typedef struct _fetch_data {
4187         IMAPSession *session;
4188         guint32 uid;
4189         const gchar *filename;
4190         gboolean headers;
4191         gboolean body;
4192         gboolean done;
4193 } fetch_data;
4194
4195 static void *imap_cmd_fetch_thread(void *data)
4196 {
4197         fetch_data *stuff = (fetch_data *)data;
4198         IMAPSession *session = stuff->session;
4199         guint32 uid = stuff->uid;
4200         const gchar *filename = stuff->filename;
4201         int r;
4202
4203         if (stuff->body) {
4204                 r = imap_threaded_fetch_content(session->folder,
4205                                                uid, 1, filename);
4206         }
4207         else {
4208                 r = imap_threaded_fetch_content(session->folder,
4209                                                 uid, 0, filename);
4210         }
4211         if (r != MAILIMAP_NO_ERROR) {
4212                 imap_handle_error(SESSION(session), NULL, r);
4213                 debug_print("fetch err %d\n", r);
4214                 return GINT_TO_POINTER(r);
4215         }
4216         return GINT_TO_POINTER(MAILIMAP_NO_ERROR);
4217 }
4218
4219 static gint imap_cmd_fetch(IMAPSession *session, guint32 uid,
4220                                 const gchar *filename, gboolean headers,
4221                                 gboolean body)
4222 {
4223         fetch_data *data = g_new0(fetch_data, 1);
4224         int result = 0;
4225         data->done = FALSE;
4226         data->session = session;
4227         data->uid = uid;
4228         data->filename = filename;
4229         data->headers = headers;
4230         data->body = body;
4231
4232         if (prefs_common.work_offline &&
4233             !inc_offline_should_override(FALSE,
4234                 _("Claws Mail needs network access in order "
4235                   "to access the IMAP server."))) {
4236                 g_free(data);
4237                 return -1;
4238         }
4239         statusbar_print_all(_("Fetching message..."));
4240         result = GPOINTER_TO_INT(imap_cmd_fetch_thread(data));
4241         statusbar_pop_all();
4242         g_free(data);
4243         return result;
4244 }
4245
4246
4247 static gint imap_cmd_append(IMAPSession *session,
4248                             IMAPFolderItem *item,
4249                             const gchar *destfolder,
4250                             const gchar *file, IMAPFlags flags,
4251                             guint32 *new_uid)
4252 {
4253         struct mailimap_flag_list * flag_list;
4254         int r;
4255
4256         cm_return_val_if_fail(file != NULL, MAILIMAP_ERROR_BAD_STATE);
4257
4258         flag_list = imap_flag_to_lep(item, flags, NULL);
4259         lock_session(session);
4260         r = imap_threaded_append(session->folder, destfolder,
4261                          file, flag_list, (int *)new_uid);
4262         mailimap_flag_list_free(flag_list);
4263
4264         if (r != MAILIMAP_NO_ERROR) {
4265                 imap_handle_error(SESSION(session), NULL, r);
4266                 debug_print("append err %d\n", r);
4267                 return r;
4268         }
4269
4270         unlock_session(session);
4271
4272         return MAILIMAP_NO_ERROR;
4273 }
4274
4275 static gint imap_cmd_copy(IMAPSession *session, struct mailimap_set * set,
4276                           const gchar *destfolder,
4277                           struct mailimap_set **source, struct mailimap_set **dest)
4278 {
4279         int r;
4280
4281         g_return_val_if_fail(session != NULL, MAILIMAP_ERROR_BAD_STATE);
4282         g_return_val_if_fail(set != NULL, MAILIMAP_ERROR_BAD_STATE);
4283         g_return_val_if_fail(destfolder != NULL, MAILIMAP_ERROR_BAD_STATE);
4284
4285         r = imap_threaded_copy(session->folder, set, destfolder, source, dest);
4286         if (r != MAILIMAP_NO_ERROR) {
4287                 imap_handle_error(SESSION(session), NULL, r);
4288                 return r;
4289         }
4290
4291         return MAILIMAP_NO_ERROR;
4292 }
4293
4294 static gint imap_cmd_store(IMAPSession *session,
4295                            IMAPFolderItem *item,
4296                            struct mailimap_set * set,
4297                            IMAPFlags flags, GSList *tags, int do_add)
4298 {
4299         int r;
4300         struct mailimap_flag_list * flag_list = NULL;
4301         struct mailimap_store_att_flags * store_att_flags;
4302
4303         flag_list = imap_flag_to_lep(item, flags, tags);
4304
4305         if (do_add)
4306                 store_att_flags =
4307                         mailimap_store_att_flags_new_add_flags_silent(flag_list);
4308         else
4309                 store_att_flags =
4310                         mailimap_store_att_flags_new_remove_flags_silent(flag_list);
4311
4312         r = imap_threaded_store(session->folder, set, store_att_flags);
4313         mailimap_store_att_flags_free(store_att_flags);
4314         if (r != MAILIMAP_NO_ERROR) {
4315                 imap_handle_error(SESSION(session), NULL, r);
4316                 return r;
4317         }
4318
4319         return MAILIMAP_NO_ERROR;
4320 }
4321
4322 static gint imap_cmd_expunge(IMAPSession *session, gboolean do_expunge)
4323 {
4324         int r;
4325
4326         if (!do_expunge)
4327                 return MAILIMAP_NO_ERROR;
4328
4329         if (prefs_common.work_offline &&
4330             !inc_offline_should_override(FALSE,
4331                 _("Claws Mail needs network access in order "
4332                   "to access the IMAP server."))) {
4333                 return -1;
4334         }
4335
4336         r = imap_threaded_expunge(session->folder);
4337         if (r != MAILIMAP_NO_ERROR) {
4338                 imap_handle_error(SESSION(session), NULL, r);
4339                 return r;
4340         }
4341
4342         return MAILIMAP_NO_ERROR;
4343 }
4344
4345 gint imap_expunge(Folder *folder, FolderItem *item)
4346 {
4347         IMAPSession *session = imap_session_get(folder);
4348         if (session == NULL)
4349                 return -1;
4350
4351         return imap_cmd_expunge(session, TRUE);
4352 }
4353
4354 static void imap_path_separator_subst(gchar *str, gchar separator)
4355 {
4356         gchar *p;
4357         gboolean in_escape = FALSE;
4358
4359         if (!separator || separator == '/') return;
4360
4361         for (p = str; *p != '\0'; p++) {
4362                 if (*p == '/' && !in_escape)
4363                         *p = separator;
4364                 else if (*p == '&' && *(p + 1) != '-' && !in_escape)
4365                         in_escape = TRUE;
4366                 else if (*p == '-' && in_escape)
4367                         in_escape = FALSE;
4368         }
4369 }
4370
4371 static gboolean imap_rename_folder_func(GNode *node, gpointer data)
4372 {
4373         FolderItem *item = node->data;
4374         gchar **paths = data;
4375         const gchar *oldpath = paths[0];
4376         const gchar *newpath = paths[1];
4377         gchar *real_oldpath, *real_newpath;
4378         gchar *base;
4379         gchar *new_itempath;
4380         gint oldpathlen;
4381         IMAPSession *session = imap_session_get(item->folder);
4382         gint ok = MAILIMAP_NO_ERROR;
4383         oldpathlen = strlen(oldpath);
4384         if (strncmp(oldpath, item->path, oldpathlen) != 0) {
4385                 g_warning("path doesn't match: %s, %s\n", oldpath, item->path);
4386                 return TRUE;
4387         }
4388
4389         base = item->path + oldpathlen;
4390         while (*base == G_DIR_SEPARATOR) base++;
4391         if (*base == '\0')
4392                 new_itempath = g_strdup(newpath);
4393         else
4394                 new_itempath = g_strconcat(newpath, G_DIR_SEPARATOR_S, base,
4395                                            NULL);
4396
4397         real_oldpath = imap_get_real_path(session, IMAP_FOLDER(item->folder), item->path, &ok);
4398         g_free(item->path);
4399         item->path = new_itempath;
4400
4401         real_newpath = imap_get_real_path(session, IMAP_FOLDER(item->folder), item->path, &ok);
4402
4403         imap_threaded_subscribe(item->folder, real_oldpath, FALSE);
4404         imap_threaded_subscribe(item->folder, real_newpath, TRUE);
4405
4406         g_free(real_oldpath);
4407         g_free(real_newpath);
4408         return FALSE;
4409 }
4410
4411 static gint get_list_of_uids(IMAPSession *session, Folder *folder, IMAPFolderItem *item, GSList **msgnum_list)
4412 {
4413         GSList *uidlist, *elem;
4414         int r = -1;
4415         clist * lep_uidlist;
4416         gint ok, nummsgs = 0;
4417
4418         if (session == NULL) {
4419                 return -1;
4420         }
4421
4422         ok = imap_select(session, IMAP_FOLDER(folder), FOLDER_ITEM(item),
4423                          NULL, NULL, NULL, NULL, NULL, TRUE);
4424         if (ok != MAILIMAP_NO_ERROR) {
4425                 return -1;
4426         }
4427
4428         g_slist_free(item->uid_list);
4429         item->uid_list = NULL;
4430
4431         uidlist = NULL;
4432
4433         if (folder->account && folder->account->low_bandwidth) {
4434                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SIMPLE,
4435                                 NULL, NULL, NULL, &lep_uidlist);
4436         }
4437
4438         if (r == MAILIMAP_NO_ERROR) {
4439                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
4440                 mailimap_search_result_free(lep_uidlist);
4441         } else {
4442                 carray * lep_uidtab;
4443                 if (r != -1) { /* inited */
4444                         imap_handle_error(SESSION(session), NULL, r);
4445                         if (is_fatal(r))
4446                                 return -1;
4447                 }
4448                 r = imap_threaded_fetch_uid(folder, 1,
4449                                     &lep_uidtab);
4450                 if (r == MAILIMAP_NO_ERROR) {
4451                         uidlist = imap_uid_list_from_lep_tab(lep_uidtab);
4452                         imap_fetch_uid_list_free(lep_uidtab);
4453                 }
4454         }
4455
4456         if (r != MAILIMAP_NO_ERROR) {
4457                 imap_handle_error(SESSION(session), NULL, r);
4458                 return -1;
4459         }
4460
4461         for (elem = uidlist; elem != NULL; elem = g_slist_next(elem)) {
4462                 guint msgnum;
4463
4464                 msgnum = GPOINTER_TO_INT(elem->data);
4465
4466                 *msgnum_list = g_slist_prepend(*msgnum_list, GINT_TO_POINTER(msgnum));
4467                 item->uid_list = g_slist_prepend(item->uid_list, GINT_TO_POINTER(msgnum));
4468                 nummsgs++;
4469         }
4470         g_slist_free(uidlist);
4471
4472         unlock_session(session); /* locked from imap_get_num_list */
4473
4474         return nummsgs;
4475
4476 }
4477
4478 gint imap_get_num_list(Folder *folder, FolderItem *_item, GSList **msgnum_list, gboolean *old_uids_valid)
4479 {
4480         IMAPFolderItem *item = (IMAPFolderItem *)_item;
4481         IMAPSession *session;
4482         gint nummsgs;
4483         GSList *uidlist = NULL;
4484         gchar *dir;
4485         gint known_list_len = 0;
4486         debug_print("get_num_list\n");
4487
4488         g_return_val_if_fail(folder != NULL, -1);
4489         g_return_val_if_fail(item != NULL, -1);
4490         g_return_val_if_fail(item->item.path != NULL, -1);
4491         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
4492         g_return_val_if_fail(folder->account != NULL, -1);
4493
4494         known_list_len = g_slist_length(item->uid_list);
4495         if (!item->should_update) {
4496                 debug_print("get_num_list: nothing to update\n");
4497                 *old_uids_valid = TRUE;
4498                 if (known_list_len == item->item.total_msgs
4499                  && known_list_len > 0) {
4500                         *msgnum_list = g_slist_copy(item->uid_list);
4501                         return known_list_len;
4502                 } else {
4503                         debug_print("don't know the list length...\n");
4504                 }
4505         }
4506
4507         if (prefs_common.work_offline &&
4508             !inc_offline_should_override(FALSE,
4509                 _("Claws Mail needs network access in order "
4510                   "to access the IMAP server."))) {
4511                 return -1;
4512         }
4513
4514         debug_print("getting session...\n");
4515         session = imap_session_get(folder);
4516         g_return_val_if_fail(session != NULL, -1);
4517
4518         lock_session(session); /* unlocked by get_list_of_uids */
4519         if (FOLDER_ITEM(item)->path)
4520                 statusbar_print_all(_("Scanning folder %s%c%s..."),
4521                                       FOLDER_ITEM(item)->folder->name,
4522                                       G_DIR_SEPARATOR,
4523                                       FOLDER_ITEM(item)->path);
4524         else
4525                 statusbar_print_all(_("Scanning folder %s..."),
4526                                       FOLDER_ITEM(item)->folder->name);
4527
4528         if (item->should_trash_cache) {
4529                 *old_uids_valid = FALSE;
4530                 debug_print("get_num_list: trashing num list\n");
4531                 debug_print("Freeing imap uid cache\n");
4532                 item->lastuid = 0;
4533                 g_slist_free(item->uid_list);
4534                 item->uid_list = NULL;
4535
4536                 imap_delete_all_cached_messages((FolderItem *)item);
4537         } else {
4538                 debug_print("get_num_list: updating num list\n");
4539                 *old_uids_valid = TRUE;
4540         }
4541
4542         nummsgs = get_list_of_uids(session, folder, item, &uidlist);
4543         /* session could be broken now, in case of fatal error */
4544
4545         debug_print("get_num_list: got %d msgs\n", nummsgs);
4546
4547         if (nummsgs < 0) {
4548                 statusbar_pop_all();
4549                 return -1;
4550         }
4551
4552         *msgnum_list = uidlist;
4553
4554         dir = folder_item_get_path((FolderItem *)item);
4555         debug_print("removing old messages from %s\n", dir);
4556         remove_numbered_files_not_in_list(dir, *msgnum_list);
4557         g_free(dir);
4558
4559         debug_print("get_num_list - ok - %i\n", nummsgs);
4560         statusbar_pop_all();
4561         item->should_trash_cache = FALSE;
4562         item->should_update = FALSE;
4563         return nummsgs;
4564 }
4565
4566 static MsgInfo *imap_parse_msg(const gchar *file, FolderItem *item)
4567 {
4568         MsgInfo *msginfo;
4569         MsgFlags flags;
4570
4571         flags.perm_flags = MSG_NEW|MSG_UNREAD;
4572         flags.tmp_flags = 0;
4573
4574         g_return_val_if_fail(item != NULL, NULL);
4575         g_return_val_if_fail(file != NULL, NULL);
4576
4577         if (folder_has_parent_of_type(item, F_QUEUE)) {
4578                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
4579         } else if (folder_has_parent_of_type(item, F_DRAFT)) {
4580                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
4581         }
4582
4583         msginfo = procheader_parse_file(file, flags, FALSE, FALSE);
4584         if (!msginfo) return NULL;
4585
4586         msginfo->plaintext_file = g_strdup(file);
4587         msginfo->folder = item;
4588
4589         return msginfo;
4590 }
4591
4592 GSList *imap_get_msginfos(Folder *folder, FolderItem *item,
4593                           GSList *msgnum_list)
4594 {
4595         IMAPSession *session;
4596         MsgInfoList *ret = NULL;
4597         gint ok;
4598
4599         debug_print("get_msginfos\n");
4600
4601         g_return_val_if_fail(folder != NULL, NULL);
4602         g_return_val_if_fail(item != NULL, NULL);
4603         g_return_val_if_fail(msgnum_list != NULL, NULL);
4604
4605         debug_print("getting session...\n");
4606         session = imap_session_get(folder);
4607         g_return_val_if_fail(session != NULL, NULL);
4608
4609         lock_session(session); /* unlocked later in the function */
4610
4611         debug_print("IMAP getting msginfos\n");
4612         ok = imap_select(session, IMAP_FOLDER(folder), item,
4613                          NULL, NULL, NULL, NULL, NULL, FALSE);
4614         if (ok != MAILIMAP_NO_ERROR) {
4615                 return NULL;
4616         }
4617         if (!(folder_has_parent_of_type(item, F_DRAFT) ||
4618               folder_has_parent_of_type(item, F_QUEUE))) {
4619                 ret = g_slist_concat(ret,
4620                         imap_get_uncached_messages(session, item,
4621                                                    msgnum_list, &ok));
4622                 if (ok != MAILIMAP_NO_ERROR)
4623                         return NULL;
4624                 unlock_session(session);
4625         } else {
4626                 MsgNumberList *sorted_list, *elem, *llast = NULL;
4627                 gint startnum, lastnum;
4628
4629                 unlock_session(session);
4630
4631                 sorted_list = g_slist_sort(g_slist_copy(msgnum_list), g_int_compare);
4632
4633                 startnum = lastnum = GPOINTER_TO_INT(sorted_list->data);
4634
4635                 llast = g_slist_last(ret);
4636                 for (elem = sorted_list;; elem = g_slist_next(elem)) {
4637                         guint num = 0;
4638
4639                         if (elem)
4640                                 num = GPOINTER_TO_INT(elem->data);
4641
4642                         if (num > lastnum + 1 || elem == NULL) {
4643                                 int i;
4644                                 for (i = startnum; i <= lastnum; ++i) {
4645                                         gchar *file;
4646                                         file = imap_fetch_msg(folder, item, i);
4647                                         if (file != NULL) {
4648                                                 MsgInfo *msginfo = imap_parse_msg(file, item);
4649                                                 if (msginfo != NULL) {
4650                                                         msginfo->msgnum = i;
4651                                                         if (llast == NULL)
4652                                                                 llast = ret = g_slist_append(ret, msginfo);
4653                                                         else {
4654                                                                 llast = g_slist_append(llast, msginfo);
4655                                                                 llast = llast->next;
4656                                                         }
4657                                                 }
4658                                                 g_free(file);
4659                                         }
4660                                 }
4661
4662                                 if (elem == NULL)
4663                                         break;
4664
4665                                 startnum = num;
4666                         }
4667                         lastnum = num;
4668                 }
4669
4670                 g_slist_free(sorted_list);
4671         }
4672         return ret;
4673 }
4674
4675 MsgInfo *imap_get_msginfo(Folder *folder, FolderItem *item, gint uid)
4676 {
4677         MsgInfo *msginfo = NULL;
4678         MsgInfoList *msginfolist;
4679         MsgNumberList numlist;
4680
4681         numlist.next = NULL;
4682         numlist.data = GINT_TO_POINTER(uid);
4683
4684         msginfolist = imap_get_msginfos(folder, item, &numlist);
4685         if (msginfolist != NULL) {
4686                 msginfo = msginfolist->data;
4687                 g_slist_free(msginfolist);
4688         }
4689
4690         return msginfo;
4691 }
4692
4693 gboolean imap_scan_required(Folder *folder, FolderItem *_item)
4694 {
4695         IMAPSession *session;
4696         IMAPFolderItem *item = (IMAPFolderItem *)_item;
4697         gint ok, exists = 0, unseen = 0;
4698         guint32 uid_next = 0, uid_val = 0;
4699         gboolean selected_folder;
4700
4701         g_return_val_if_fail(folder != NULL, FALSE);
4702         g_return_val_if_fail(item != NULL, FALSE);
4703         g_return_val_if_fail(item->item.folder != NULL, FALSE);
4704         g_return_val_if_fail(FOLDER_CLASS(item->item.folder) == &imap_class, FALSE);
4705
4706         if (item->item.path == NULL)
4707                 return FALSE;
4708
4709         if (item->should_update) {
4710                 debug_print("scan already required\n");
4711                 return TRUE;
4712         }
4713         debug_print("getting session...\n");
4714         session = imap_session_get(folder);
4715
4716         g_return_val_if_fail(session != NULL, FALSE);
4717         lock_session(session); /* unlocked later in the function */
4718
4719         selected_folder = (session->mbox != NULL) &&
4720                           (!strcmp(session->mbox, item->item.path));
4721         if (selected_folder) {
4722                 if (!session->folder_content_changed) {
4723                         ok = imap_cmd_noop(session);
4724                         if (ok != MAILIMAP_NO_ERROR) {
4725                                 debug_print("disconnected!\n");
4726                                 if (!is_fatal(ok))
4727                                         session = imap_reconnect_if_possible(folder, session);
4728                                 else
4729                                         session = imap_session_get(folder);
4730                                 if (session == NULL)
4731                                         return FALSE;
4732                         }
4733
4734                         if (session->folder_content_changed) {
4735                                 debug_print("CHANGED (self-noop)! scan_required\n");
4736                                 item->should_update = TRUE;
4737                                 if (session->uid_validity && session->uid_validity != item->item.mtime) {
4738                                         item->item.mtime = session->uid_validity;
4739                                         item->should_trash_cache = TRUE;
4740                                 }
4741                                 unlock_session(session);
4742                                 return TRUE;
4743                         }
4744                 } else {
4745                         debug_print("CHANGED (previous noop)! scan_required\n");
4746                         item->should_update = TRUE;
4747                         if (session->uid_validity && session->uid_validity != item->item.mtime) {
4748                                 item->item.mtime = session->uid_validity;
4749                                 item->should_trash_cache = TRUE;
4750                         }
4751                         unlock_session(session);
4752                         return TRUE;
4753                 }
4754         } else {
4755                 ok = imap_status(session, IMAP_FOLDER(folder), item->item.path, IMAP_FOLDER_ITEM(item),
4756                                  &exists, &uid_next, &uid_val, &unseen, FALSE);
4757                 if (ok != MAILIMAP_NO_ERROR) {
4758                         return FALSE;
4759                 }
4760
4761                 debug_print("exists %d, item->item.total_msgs %d\n",
4762                         exists, item->item.total_msgs);
4763                 if (exists != item->item.total_msgs
4764                     || unseen != item->item.unread_msgs
4765                     || uid_next != item->uid_next
4766                     || uid_val != item->item.mtime) {
4767                         debug_print("CHANGED (status)! scan_required\n");
4768                         item->last_change = time(NULL);
4769                         item->should_update = TRUE;
4770                         item->uid_next = uid_next;
4771                         if (uid_val != item->item.mtime) {
4772                                 item->item.mtime = uid_val;
4773                                 item->should_trash_cache = TRUE;
4774                         }
4775                         unlock_session(session);
4776                         return TRUE;
4777                 }
4778         }
4779         unlock_session(session);
4780
4781         item->should_update = FALSE;
4782         return FALSE;
4783 }
4784
4785 void imap_change_flags(Folder *folder, FolderItem *item, MsgInfo *msginfo, MsgPermFlags newflags)
4786 {
4787         IMAPSession *session;
4788         IMAPFlags flags_set = 0, flags_unset = 0;
4789         gint ok = MAILIMAP_NO_ERROR;
4790         MsgNumberList numlist;
4791         hashtable_data *ht_data = NULL;
4792
4793         g_return_if_fail(folder != NULL);
4794         g_return_if_fail(folder->klass == &imap_class);
4795         g_return_if_fail(item != NULL);
4796         g_return_if_fail(item->folder == folder);
4797         g_return_if_fail(msginfo != NULL);
4798         g_return_if_fail(msginfo->folder == item);
4799
4800         if (!MSG_IS_MARKED(msginfo->flags) &&  (newflags & MSG_MARKED))
4801                 flags_set |= IMAP_FLAG_FLAGGED;
4802         if ( MSG_IS_MARKED(msginfo->flags) && !(newflags & MSG_MARKED))
4803                 flags_unset |= IMAP_FLAG_FLAGGED;
4804
4805         if (!MSG_IS_UNREAD(msginfo->flags) &&  (newflags & MSG_UNREAD))
4806                 flags_unset |= IMAP_FLAG_SEEN;
4807         if ( MSG_IS_UNREAD(msginfo->flags) && !(newflags & MSG_UNREAD))
4808                 flags_set |= IMAP_FLAG_SEEN;
4809
4810         if (!MSG_IS_REPLIED(msginfo->flags) &&  (newflags & MSG_REPLIED))
4811                 flags_set |= IMAP_FLAG_ANSWERED;
4812         if ( MSG_IS_REPLIED(msginfo->flags) && !(newflags & MSG_REPLIED))
4813                 flags_unset |= IMAP_FLAG_ANSWERED;
4814
4815         if (!MSG_IS_FORWARDED(msginfo->flags) &&  (newflags & MSG_FORWARDED))
4816                 flags_set |= IMAP_FLAG_FORWARDED;
4817         if ( MSG_IS_FORWARDED(msginfo->flags) && !(newflags & MSG_FORWARDED))
4818                 flags_unset |= IMAP_FLAG_FORWARDED;
4819
4820         if (!MSG_IS_SPAM(msginfo->flags) &&  (newflags & MSG_SPAM)) {
4821                 flags_set |= IMAP_FLAG_SPAM;
4822                 flags_unset |= IMAP_FLAG_HAM;
4823         }
4824         if ( MSG_IS_SPAM(msginfo->flags) && !(newflags & MSG_SPAM)) {
4825                 flags_set |= IMAP_FLAG_HAM;
4826                 flags_unset |= IMAP_FLAG_SPAM;
4827         }
4828         if (!MSG_IS_DELETED(msginfo->flags) &&  (newflags & MSG_DELETED))
4829                 flags_set |= IMAP_FLAG_DELETED;
4830         if ( MSG_IS_DELETED(msginfo->flags) && !(newflags & MSG_DELETED))
4831                 flags_unset |= IMAP_FLAG_DELETED;
4832
4833         if (!flags_set && !flags_unset) {
4834                 /* the changed flags were not translatable to IMAP-speak.
4835                  * like MSG_POSTFILTERED, so just apply. */
4836                 msginfo->flags.perm_flags = newflags;
4837                 return;
4838         }
4839
4840         debug_print("getting session...\n");
4841         session = imap_session_get(folder);
4842         if (!session) {
4843                 return;
4844         }
4845
4846         if ((ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
4847             NULL, NULL, NULL, NULL, NULL, FALSE)) != MAILIMAP_NO_ERROR) {
4848                 return;
4849         }
4850         numlist.next = NULL;
4851         numlist.data = GINT_TO_POINTER(msginfo->msgnum);
4852
4853         if (IMAP_FOLDER_ITEM(item)->batching) {
4854                 /* instead of performing an UID STORE command for each message change,
4855                  * as a lot of them can change "together", we just fill in hashtables
4856                  * and defer the treatment so that we're able to send only one
4857                  * command.
4858                  */
4859                 debug_print("IMAP batch mode on, deferring flags change\n");
4860                 if (flags_set) {
4861                         ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->flags_set_table,
4862                                 GINT_TO_POINTER(flags_set));
4863                         if (ht_data == NULL) {
4864                                 ht_data = g_new0(hashtable_data, 1);
4865                                 ht_data->item = IMAP_FOLDER_ITEM(item);
4866                                 g_hash_table_insert(IMAP_FOLDER_ITEM(item)->flags_set_table,
4867                                         GINT_TO_POINTER(flags_set), ht_data);
4868                         }
4869                         ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
4870                 }
4871                 if (flags_unset) {
4872                         ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->flags_unset_table,
4873                                 GINT_TO_POINTER(flags_unset));
4874                         if (ht_data == NULL) {
4875                                 ht_data = g_new0(hashtable_data, 1);
4876                                 ht_data->item = IMAP_FOLDER_ITEM(item);
4877                                 g_hash_table_insert(IMAP_FOLDER_ITEM(item)->flags_unset_table,
4878                                         GINT_TO_POINTER(flags_unset), ht_data);
4879                         }
4880                         ht_data->msglist = g_slist_prepend(ht_data->msglist,
4881                                         GINT_TO_POINTER(msginfo->msgnum));
4882                 }
4883         } else {
4884                 debug_print("IMAP changing flags\n");
4885                 if (flags_set) {
4886                         ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item), &numlist, flags_set, NULL, TRUE);
4887                         if (ok != MAILIMAP_NO_ERROR) {
4888                                 return;
4889                         }
4890                 }
4891
4892                 if (flags_unset) {
4893                         ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item), &numlist, flags_unset, NULL, FALSE);
4894                         if (ok != MAILIMAP_NO_ERROR) {
4895                                 return;
4896                         }
4897                 }
4898         }
4899         msginfo->flags.perm_flags = newflags;
4900         return;
4901 }
4902
4903 static gint imap_remove_msg(Folder *folder, FolderItem *item, gint uid)
4904 {
4905         gint ok;
4906         IMAPSession *session;
4907         gchar *dir;
4908         MsgNumberList numlist;
4909
4910         g_return_val_if_fail(folder != NULL, -1);
4911         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
4912         g_return_val_if_fail(item != NULL, -1);
4913
4914         debug_print("getting session...\n");
4915         session = imap_session_get(folder);
4916         if (!session) return -1;
4917
4918         ok = imap_select(session, IMAP_FOLDER(folder), item,
4919                          NULL, NULL, NULL, NULL, NULL, FALSE);
4920         if (ok != MAILIMAP_NO_ERROR) {
4921                 return ok;
4922         }
4923         numlist.next = NULL;
4924         numlist.data = GINT_TO_POINTER(uid);
4925
4926         ok = imap_set_message_flags
4927                 (session, IMAP_FOLDER_ITEM(item), &numlist, IMAP_FLAG_DELETED, NULL, TRUE);
4928         if (ok != MAILIMAP_NO_ERROR) {
4929                 log_warning(LOG_PROTOCOL, _("can't set deleted flags: %d\n"), uid);
4930                 return ok;
4931         }
4932
4933         ok = imap_cmd_expunge(session, folder->account->imap_use_trash);
4934
4935         if (ok != MAILIMAP_NO_ERROR) {
4936                 log_warning(LOG_PROTOCOL, _("can't expunge\n"));
4937                 return ok;
4938         }
4939
4940         IMAP_FOLDER_ITEM(item)->uid_list = g_slist_remove(
4941             IMAP_FOLDER_ITEM(item)->uid_list, numlist.data);
4942         dir = folder_item_get_path(item);
4943         if (is_dir_exist(dir))
4944                 remove_numbered_files(dir, uid, uid);
4945         g_free(dir);
4946         return MAILIMAP_NO_ERROR;
4947 }
4948
4949 static gint compare_msginfo(gconstpointer a, gconstpointer b)
4950 {
4951         return ((MsgInfo *)a)->msgnum - ((MsgInfo *)b)->msgnum;
4952 }
4953
4954 static guint gslist_find_next_num(MsgNumberList **list, guint num)
4955 {
4956         GSList *elem;
4957
4958         g_return_val_if_fail(list != NULL, -1);
4959
4960         for (elem = *list; elem != NULL; elem = g_slist_next(elem))
4961                 if (GPOINTER_TO_INT(elem->data) >= num)
4962                         break;
4963         *list = elem;
4964         return elem != NULL ? GPOINTER_TO_INT(elem->data) : (gint)-1;
4965 }
4966
4967 static gboolean flag_ok(IMAPFolderItem *item, guint flag)
4968 {
4969         if (item->ok_flags && g_slist_find(item->ok_flags, GUINT_TO_POINTER(flag))) {
4970                 debug_print("flag %d is OK\n", flag);
4971                 return TRUE;
4972         }
4973         if (item->can_create_flags == ITEM_CAN_CREATE_FLAGS) {
4974                 debug_print("creating flags is OK\n");
4975                 return TRUE;
4976         }
4977         return FALSE;
4978 }
4979
4980 /*
4981  * NEW and DELETED flags are not syncronized
4982  * - The NEW/RECENT flags in IMAP folders can not really be directly
4983  *   modified by Sylpheed
4984  * - The DELETE/DELETED flag in IMAP and Sylpheed don't have the same
4985  *   meaning, in IMAP it always removes the messages from the FolderItem
4986  *   in Sylpheed it can mean to move the message to trash
4987  */
4988
4989 typedef struct _get_flags_data {
4990         Folder *folder;
4991         FolderItem *item;
4992         MsgInfoList *msginfo_list;
4993         GHashTable *msgflags;
4994         gboolean full_search;
4995         gboolean done;
4996 } get_flags_data;
4997
4998 static /*gint*/ void *imap_get_flags_thread(void *data)
4999 {
5000         get_flags_data *stuff = (get_flags_data *)data;
5001         Folder *folder = stuff->folder;
5002         FolderItem *fitem = (FolderItem *) stuff->item;
5003         MsgInfoList *msginfo_list = stuff->msginfo_list;
5004         GHashTable *msgflags = stuff->msgflags;
5005         GSList *elem;
5006         carray * lep_uidtab;
5007         IMAPSession *session;
5008         gint ok;
5009         int r = MAILIMAP_NO_ERROR;
5010         GHashTable *flags_hash = NULL;
5011         GHashTable *tags_hash = NULL;
5012         gboolean full_search = stuff->full_search;
5013         GSList *sorted_list = NULL;
5014         GSList *unseen = NULL, *answered = NULL, *flagged = NULL, *deleted = NULL, *forwarded = NULL, *spam = NULL;
5015         GSList *seq_list, *cur;
5016         gboolean reverse_seen = FALSE;
5017         gboolean selected_folder;
5018         gint exists_cnt, unseen_cnt;
5019         gboolean got_alien_tags = FALSE;
5020
5021         session = imap_session_get(folder);
5022
5023         if (session == NULL) {
5024                 stuff->done = TRUE;
5025                 return GINT_TO_POINTER(-1);
5026         }
5027         selected_folder = (session->mbox != NULL) &&
5028                           (!strcmp(session->mbox, fitem->path));
5029
5030         lock_session(session);
5031         if (!selected_folder) {
5032                 ok = imap_select(session, IMAP_FOLDER(folder), fitem,
5033                         &exists_cnt, NULL, &unseen_cnt, NULL, NULL, TRUE);
5034                 if (ok != MAILIMAP_NO_ERROR) {
5035                         stuff->done = TRUE;
5036                         return GINT_TO_POINTER(-1);
5037                 }
5038
5039                 if (unseen_cnt > exists_cnt / 2)
5040                         reverse_seen = TRUE;
5041         }
5042         else {
5043                 if (fitem->unread_msgs > fitem->total_msgs / 2)
5044                         reverse_seen = TRUE;
5045         }
5046
5047         sorted_list = g_slist_sort(g_slist_copy(msginfo_list), compare_msginfo);
5048         if (!full_search) {
5049                 seq_list = imap_get_lep_set_from_msglist(IMAP_FOLDER(folder), msginfo_list);
5050         } else {
5051                 struct mailimap_set * set;
5052                 set = mailimap_set_new_interval(1, 0);
5053                 seq_list = g_slist_append(NULL, set);
5054         }
5055
5056         if (folder->account && folder->account->low_bandwidth) {
5057                 for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
5058                         struct mailimap_set * imapset;
5059                         clist * lep_uidlist;
5060                         int r;
5061
5062                         imapset = cur->data;
5063                         if (reverse_seen) {
5064                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SEEN, NULL,
5065                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5066                         }
5067                         else {
5068                                 r = imap_threaded_search(folder,
5069                                                          IMAP_SEARCH_TYPE_UNSEEN, NULL,
5070                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5071                         }
5072                         if (r == MAILIMAP_NO_ERROR) {
5073                                 GSList * uidlist;
5074
5075                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5076                                 mailimap_search_result_free(lep_uidlist);
5077
5078                                 unseen = g_slist_concat(unseen, uidlist);
5079                         } else {
5080                                 imap_handle_error(SESSION(session), NULL, r);
5081                                 goto bail;
5082                         }
5083
5084                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_FLAGGED, NULL,
5085                                                  NULL, full_search ? NULL:imapset, &lep_uidlist);
5086                         if (r == MAILIMAP_NO_ERROR) {
5087                                 GSList * uidlist;
5088
5089                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5090                                 mailimap_search_result_free(lep_uidlist);
5091
5092                                 flagged = g_slist_concat(flagged, uidlist);
5093                         } else {
5094                                 imap_handle_error(SESSION(session), NULL, r);
5095                                 goto bail;
5096                         }
5097
5098                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
5099                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_ANSWERED, NULL,
5100                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5101                                 if (r == MAILIMAP_NO_ERROR) {
5102                                         GSList * uidlist;
5103
5104                                         uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5105                                         mailimap_search_result_free(lep_uidlist);
5106
5107                                         answered = g_slist_concat(answered, uidlist);
5108                                 } else {
5109                                         imap_handle_error(SESSION(session), NULL, r);
5110                                         goto bail;
5111                                 }
5112
5113                                 if (flag_ok(IMAP_FOLDER_ITEM(fitem), IMAP_FLAG_FORWARDED)) {
5114                                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_FORWARDED, NULL,
5115                                                                  NULL, full_search ? NULL:imapset, &lep_uidlist);
5116                                         if (r == MAILIMAP_NO_ERROR) {
5117                                                 GSList * uidlist;
5118
5119                                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5120                                                 mailimap_search_result_free(lep_uidlist);
5121
5122                                                 forwarded = g_slist_concat(forwarded, uidlist);
5123                                         } else {
5124                                                 imap_handle_error(SESSION(session), NULL, r);
5125                                                 goto bail;
5126                                         }
5127                                 }
5128
5129                                 if (flag_ok(IMAP_FOLDER_ITEM(fitem), IMAP_FLAG_SPAM)) {
5130                                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SPAM, NULL,
5131                                                                  NULL, full_search ? NULL:imapset, &lep_uidlist);
5132                                         if (r == MAILIMAP_NO_ERROR) {
5133                                                 GSList * uidlist;
5134
5135                                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5136                                                 mailimap_search_result_free(lep_uidlist);
5137
5138                                                 spam = g_slist_concat(spam, uidlist);
5139                                         } else {
5140                                                 imap_handle_error(SESSION(session), NULL, r);
5141                                                 goto bail;
5142                                         }
5143                                 }
5144
5145                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_DELETED, NULL,
5146                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5147                                 if (r == MAILIMAP_NO_ERROR) {
5148                                         GSList * uidlist;
5149
5150                                         uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5151                                         mailimap_search_result_free(lep_uidlist);
5152
5153                                         deleted = g_slist_concat(deleted, uidlist);
5154                                 } else {
5155                                         imap_handle_error(SESSION(session), NULL, r);
5156                                         goto bail;
5157                                 }
5158                         }
5159                 }
5160
5161         } else {
5162                 r = imap_threaded_fetch_uid_flags(folder, 1, &lep_uidtab);
5163                 if (r == MAILIMAP_NO_ERROR) {
5164                         flags_hash = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, NULL);
5165                         tags_hash = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, NULL);
5166                         imap_flags_hash_from_lep_uid_flags_tab(lep_uidtab, flags_hash, tags_hash);
5167                         imap_fetch_uid_flags_list_free(lep_uidtab);
5168                 } else {
5169                         imap_handle_error(SESSION(session), NULL, r);
5170                         goto bail;
5171                 }
5172         }
5173
5174 bail:
5175         if (r == MAILIMAP_NO_ERROR)
5176                 unlock_session(session);
5177
5178         for (elem = sorted_list; elem != NULL; elem = g_slist_next(elem)) {
5179                 MsgInfo *msginfo;
5180                 MsgPermFlags flags, oldflags;
5181                 gboolean wasnew;
5182
5183                 msginfo = (MsgInfo *) elem->data;
5184                 flags = msginfo->flags.perm_flags;
5185                 wasnew = (flags & MSG_NEW);
5186                 oldflags = flags & ~(MSG_NEW|MSG_UNREAD|MSG_REPLIED|MSG_FORWARDED|MSG_MARKED|MSG_DELETED|MSG_SPAM);
5187
5188                 if (folder->account && folder->account->low_bandwidth) {
5189                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
5190                                 flags &= ~((reverse_seen ? 0 : MSG_UNREAD | MSG_NEW) | MSG_REPLIED | MSG_FORWARDED | MSG_MARKED | MSG_SPAM);
5191                         } else {
5192                                 flags &= ~((reverse_seen ? 0 : MSG_UNREAD | MSG_NEW | MSG_MARKED));
5193                         }
5194                         if (reverse_seen)
5195                                 flags |= MSG_UNREAD | (wasnew ? MSG_NEW : 0);
5196                         if (gslist_find_next_num(&unseen, msginfo->msgnum) == msginfo->msgnum) {
5197                                 if (!reverse_seen) {
5198                                         flags |= MSG_UNREAD | (wasnew ? MSG_NEW : 0);
5199                                 } else {
5200                                         flags &= ~(MSG_UNREAD | MSG_NEW);
5201                                 }
5202                         }
5203
5204                         if (gslist_find_next_num(&flagged, msginfo->msgnum) == msginfo->msgnum)
5205                                 flags |= MSG_MARKED;
5206                         else
5207                                 flags &= ~MSG_MARKED;
5208
5209                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
5210                                 if (gslist_find_next_num(&answered, msginfo->msgnum) == msginfo->msgnum)
5211                                         flags |= MSG_REPLIED;
5212                                 else
5213                                         flags &= ~MSG_REPLIED;
5214                                 if (gslist_find_next_num(&forwarded, msginfo->msgnum) == msginfo->msgnum)
5215                                         flags |= MSG_FORWARDED;
5216                                 else
5217                                         flags &= ~MSG_FORWARDED;
5218                                 if (gslist_find_next_num(&spam, msginfo->msgnum) == msginfo->msgnum)
5219                                         flags |= MSG_SPAM;
5220                                 else
5221                                         flags &= ~MSG_SPAM;
5222                                 if (gslist_find_next_num(&deleted, msginfo->msgnum) == msginfo->msgnum)
5223                                         flags |= MSG_DELETED;
5224                                 else
5225                                         flags &= ~MSG_DELETED;
5226                         }
5227                 } else {
5228                         if (flags_hash != NULL) {
5229
5230                                 flags = GPOINTER_TO_INT(g_hash_table_lookup(flags_hash,
5231                                                 GINT_TO_POINTER(msginfo->msgnum)));
5232                         }
5233
5234                         if ((flags & MSG_UNREAD) == 0)
5235                                 flags &= ~MSG_NEW;
5236                         else if (wasnew)
5237                                 flags |= MSG_NEW;
5238                         flags |= oldflags;
5239
5240                         if (tags_hash != NULL) {
5241                                 GSList *tags = g_hash_table_lookup(tags_hash, GINT_TO_POINTER(msginfo->msgnum));
5242                                 GSList *cur;
5243
5244                                 g_slist_free(msginfo->tags);
5245                                 msginfo->tags = NULL;
5246
5247                                 for (cur = tags; cur; cur = cur->next) {
5248                                         gchar *real_tag = imap_modified_utf7_to_utf8(cur->data, TRUE);
5249                                         gint id = 0;
5250                                         id = tags_get_id_for_str(real_tag);
5251                                         if (id == -1) {
5252                                                 id = tags_add_tag(real_tag);
5253                                                 got_alien_tags = TRUE;
5254                                         }
5255                                         msginfo->tags = g_slist_append(
5256                                                                 msginfo->tags,
5257                                                                 GINT_TO_POINTER(id));
5258                                         g_free(real_tag);
5259                                 }
5260                                 slist_free_strings_full(tags);
5261                         }
5262                 }
5263
5264                 g_hash_table_insert(msgflags, msginfo, GINT_TO_POINTER(flags));
5265         }
5266
5267         if (got_alien_tags) {
5268                 tags_write_tags();
5269                 main_window_reflect_tags_changes(mainwindow_get_mainwindow());
5270         }
5271
5272         if (flags_hash)
5273                 g_hash_table_destroy(flags_hash);
5274         if (tags_hash)
5275                 g_hash_table_destroy(tags_hash);
5276
5277         imap_lep_set_free(seq_list);
5278         g_slist_free(flagged);
5279         g_slist_free(deleted);
5280         g_slist_free(answered);
5281         g_slist_free(forwarded);
5282         g_slist_free(spam);
5283         g_slist_free(unseen);
5284         g_slist_free(sorted_list);
5285
5286         stuff->done = TRUE;
5287         return GINT_TO_POINTER(0);
5288 }
5289
5290 static gint imap_get_flags(Folder *folder, FolderItem *item,
5291                            MsgInfoList *msginfo_list, GHashTable *msgflags)
5292 {
5293         gint result;
5294         get_flags_data *data = g_new0(get_flags_data, 1);
5295         data->done = FALSE;
5296         data->folder = folder;
5297         data->item = item;
5298         data->msginfo_list = msginfo_list;
5299         data->msgflags = msgflags;
5300         data->full_search = FALSE;
5301
5302         GSList *tmp = NULL, *cur;
5303
5304         if (prefs_common.work_offline &&
5305             !inc_offline_should_override(FALSE,
5306                 _("Claws Mail needs network access in order "
5307                   "to access the IMAP server."))) {
5308                 g_free(data);
5309                 return -1;
5310         }
5311
5312         tmp = folder_item_get_msg_list(item);
5313
5314         if (g_slist_length(tmp) <= g_slist_length(msginfo_list))
5315                 data->full_search = TRUE;
5316
5317         for (cur = tmp; cur; cur = cur->next)
5318                 procmsg_msginfo_free((MsgInfo *)cur->data);
5319
5320         g_slist_free(tmp);
5321
5322         result = GPOINTER_TO_INT(imap_get_flags_thread(data));
5323
5324         g_free(data);
5325         return result;
5326
5327 }
5328
5329 static gboolean process_flags(gpointer key, gpointer value, gpointer user_data)
5330 {
5331         gboolean flags_set = GPOINTER_TO_INT(user_data);
5332         gint flags_value = GPOINTER_TO_INT(key);
5333         hashtable_data *data = (hashtable_data *)value;
5334         IMAPFolderItem *_item = data->item;
5335         FolderItem *item = (FolderItem *)_item;
5336         gint ok = MAILIMAP_ERROR_BAD_STATE;
5337         IMAPSession *session = NULL;
5338
5339         debug_print("getting session...\n");
5340         session = imap_session_get(item->folder);
5341
5342         data->msglist = g_slist_reverse(data->msglist);
5343
5344         debug_print("IMAP %ssetting flags to %d for %d messages\n",
5345                 flags_set?"":"un",
5346                 flags_value,
5347                 g_slist_length(data->msglist));
5348
5349         lock_session(session);
5350         if (session) {
5351                 ok = imap_select(session, IMAP_FOLDER(item->folder), item,
5352                          NULL, NULL, NULL, NULL, NULL, FALSE);
5353         }
5354         if (ok == MAILIMAP_NO_ERROR) {
5355                 ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item),
5356                         data->msglist, flags_value, NULL, flags_set);
5357         } else {
5358                 g_warning("can't select mailbox %s\n", item->path);
5359         }
5360
5361         if (!is_fatal(ok))
5362                 unlock_session(session);
5363
5364         g_slist_free(data->msglist);
5365         g_free(data);
5366         return TRUE;
5367 }
5368
5369 static gboolean process_tags(gpointer key, gpointer value, gpointer user_data)
5370 {
5371         gboolean tags_set = GPOINTER_TO_INT(user_data);
5372         TagsData *data = (TagsData *)value;
5373         IMAPFolderItem *_item = data->item;
5374         FolderItem *item = (FolderItem *)_item;
5375         gchar *str = data->str;
5376         gint ok = MAILIMAP_ERROR_BAD_STATE;
5377         IMAPSession *session = NULL;
5378
5379         debug_print("getting session...\n");
5380         session = imap_session_get(item->folder);
5381
5382         data->msglist = g_slist_reverse(data->msglist);
5383
5384         debug_print("IMAP %ssetting tags %s for %d messages\n",
5385                 tags_set?"":"un",
5386                 str,
5387                 g_slist_length(data->msglist));
5388
5389         lock_session(session);
5390         if (session) {
5391                 ok = imap_select(session, IMAP_FOLDER(item->folder), item,
5392                          NULL, NULL, NULL, NULL, NULL, FALSE);
5393         }
5394         if (ok == MAILIMAP_NO_ERROR) {
5395                 GSList list;
5396                 list.data = str;
5397                 list.next = NULL;
5398                 ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item),
5399                         data->msglist, 0, &list, tags_set);
5400         } else {
5401                 g_warning("can't select mailbox %s\n", item->path);
5402         }
5403
5404         if (!is_fatal(ok))
5405                 unlock_session(session);
5406
5407         g_slist_free(data->msglist);
5408         g_free(data->str);
5409         g_free(data);
5410         return TRUE;
5411 }
5412
5413 static void process_hashtable(IMAPFolderItem *item)
5414 {
5415         if (item->flags_set_table) {
5416                 g_hash_table_foreach_remove(item->flags_set_table, process_flags, GINT_TO_POINTER(TRUE));
5417                 g_hash_table_destroy(item->flags_set_table);
5418                 item->flags_set_table = NULL;
5419         }
5420         if (item->flags_unset_table) {
5421                 g_hash_table_foreach_remove(item->flags_unset_table, process_flags, GINT_TO_POINTER(FALSE));
5422                 g_hash_table_destroy(item->flags_unset_table);
5423                 item->flags_unset_table = NULL;
5424         }
5425         if (item->tags_set_table) {
5426                 g_hash_table_foreach_remove(item->tags_set_table, process_tags, GINT_TO_POINTER(TRUE));
5427                 g_hash_table_destroy(item->tags_set_table);
5428                 item->tags_set_table = NULL;
5429         }
5430         if (item->tags_unset_table) {
5431                 g_hash_table_foreach_remove(item->tags_unset_table, process_tags, GINT_TO_POINTER(FALSE));
5432                 g_hash_table_destroy(item->tags_unset_table);
5433                 item->tags_unset_table = NULL;
5434         }
5435
5436 }
5437
5438 static void imap_set_batch (Folder *folder, FolderItem *_item, gboolean batch)
5439 {
5440         IMAPFolderItem *item = (IMAPFolderItem *)_item;
5441         IMAPSession *session;
5442
5443         g_return_if_fail(item != NULL);
5444
5445         if (item->batching == batch)
5446                 return;
5447
5448         if (batch) {
5449                 item->batching = TRUE;
5450                 debug_print("IMAP switching to batch mode\n");
5451                 if (!item->flags_set_table) {
5452                         item->flags_set_table = g_hash_table_new(NULL, g_direct_equal);
5453                 }
5454                 if (!item->flags_unset_table) {
5455                         item->flags_unset_table = g_hash_table_new(NULL, g_direct_equal);
5456                 }
5457                 if (!item->tags_set_table) {
5458                         item->tags_set_table = g_hash_table_new(NULL, g_direct_equal);
5459                 }
5460                 if (!item->tags_unset_table) {
5461                         item->tags_unset_table = g_hash_table_new(NULL, g_direct_equal);
5462                 }
5463                 session = imap_session_get(folder);
5464                 if (session) {
5465                         imap_refresh_sensitivity(session);
5466                         session->sens_update_block = TRUE;
5467                 }
5468         } else {
5469                 debug_print("IMAP switching away from batch mode\n");
5470                 /* process stuff */
5471                 process_hashtable(item);
5472                 item->batching = FALSE;
5473                 session = imap_session_get(folder);
5474                 if (session) {
5475                         session->sens_update_block = FALSE;
5476                         imap_refresh_sensitivity(session);
5477                 }
5478         }
5479 }
5480
5481
5482
5483 /* data types conversion libetpan <-> claws */
5484
5485
5486
5487 #define ETPAN_IMAP_MB_MARKED      1
5488 #define ETPAN_IMAP_MB_UNMARKED    2
5489 #define ETPAN_IMAP_MB_NOSELECT    4
5490 #define ETPAN_IMAP_MB_NOINFERIORS 8
5491
5492 static int imap_flags_to_flags(struct mailimap_mbx_list_flags * imap_flags)
5493 {
5494   int flags;
5495   clistiter * cur;
5496
5497   flags = 0;
5498   if (imap_flags->mbf_type == MAILIMAP_MBX_LIST_FLAGS_SFLAG) {
5499     switch (imap_flags->mbf_sflag) {
5500     case MAILIMAP_MBX_LIST_SFLAG_MARKED:
5501       flags |= ETPAN_IMAP_MB_MARKED;
5502       break;
5503     case MAILIMAP_MBX_LIST_SFLAG_NOSELECT:
5504       flags |= ETPAN_IMAP_MB_NOSELECT;
5505       break;
5506     case MAILIMAP_MBX_LIST_SFLAG_UNMARKED:
5507       flags |= ETPAN_IMAP_MB_UNMARKED;
5508       break;
5509     }
5510   }
5511
5512   if (imap_flags->mbf_oflags) {
5513     for(cur = clist_begin(imap_flags->mbf_oflags) ; cur != NULL ;
5514         cur = clist_next(cur)) {
5515       struct mailimap_mbx_list_oflag * oflag;
5516
5517       oflag = clist_content(cur);
5518
5519       switch (oflag->of_type) {
5520       case MAILIMAP_MBX_LIST_OFLAG_NOINFERIORS:
5521         flags |= ETPAN_IMAP_MB_NOINFERIORS;
5522         break;
5523       }
5524     }
5525   }
5526   return flags;
5527 }
5528
5529 static GSList * imap_list_from_lep(IMAPFolder * folder,
5530                                    clist * list, const gchar * real_path, gboolean all)
5531 {
5532         clistiter * iter;
5533         GSList * item_list = NULL, *llast = NULL;
5534
5535         if (list) {
5536                 for(iter = clist_begin(list) ; iter != NULL ;
5537                     iter = clist_next(iter)) {
5538                         struct mailimap_mailbox_list * mb;
5539                         int flags;
5540                         char delimiter;
5541                         char * name;
5542                         char * dup_name;
5543                         gchar * base;
5544                         gchar * loc_name;
5545                         gchar * loc_path;
5546                         FolderItem *new_item;
5547
5548                         mb = clist_content(iter);
5549
5550                         if (mb == NULL)
5551                                 continue;
5552
5553                         flags = 0;
5554                         if (mb->mb_flag != NULL)
5555                                 flags = imap_flags_to_flags(mb->mb_flag);
5556
5557                         delimiter = mb->mb_delimiter;
5558                         name = mb->mb_name;
5559
5560                         dup_name = strdup(name);
5561                         if (delimiter != '\0')
5562                                 subst_char(dup_name, delimiter, '/');
5563
5564                         base = g_path_get_basename(dup_name);
5565                         if (base[0] == '.') {
5566                                 g_free(base);
5567                                 free(dup_name);
5568                                 continue;
5569                         }
5570                         if (!all && path_cmp(name, real_path) == 0) {
5571                                 g_free(base);
5572                                 free(dup_name);
5573                                 continue;
5574                         }
5575
5576                         if (!all && dup_name[strlen(dup_name)-1] == '/') {
5577                                 dup_name[strlen(dup_name)-1] = '\0';
5578                         }
5579
5580                         loc_name = imap_modified_utf7_to_utf8(base, FALSE);
5581                         loc_path = imap_modified_utf7_to_utf8(dup_name, FALSE);
5582
5583                         new_item = folder_item_new(FOLDER(folder), loc_name, loc_path);
5584                         if ((flags & ETPAN_IMAP_MB_NOINFERIORS) != 0)
5585                                 new_item->no_sub = TRUE;
5586                         if (strcmp(dup_name, "INBOX") != 0 &&
5587                             ((flags & ETPAN_IMAP_MB_NOSELECT) != 0))
5588                                 new_item->no_select = TRUE;
5589
5590                         if (item_list == NULL)
5591                                 llast = item_list = g_slist_append(item_list, new_item);
5592                         else {
5593                                 llast = g_slist_append(llast, new_item);
5594                                 llast = llast->next;
5595                         }
5596                         debug_print("folder '%s' found.\n", loc_path);
5597                         g_free(base);
5598                         g_free(loc_path);
5599                         g_free(loc_name);
5600
5601                         free(dup_name);
5602                 }
5603         }
5604         return item_list;
5605 }
5606
5607 static GSList * imap_get_lep_set_from_numlist(IMAPFolder *folder, MsgNumberList *numlist)
5608 {
5609         GSList *sorted_list, *cur;
5610         guint first, last, next;
5611         GSList *ret_list = NULL, *llast = NULL;
5612         struct mailimap_set * current_set;
5613         unsigned int item_count;
5614
5615         if (numlist == NULL)
5616                 return NULL;
5617
5618         current_set = mailimap_set_new_empty();
5619
5620         sorted_list = g_slist_copy(numlist);
5621         sorted_list = g_slist_sort(sorted_list, g_int_compare);
5622
5623         first = GPOINTER_TO_INT(sorted_list->data);
5624
5625         item_count = 0;
5626         for (cur = sorted_list; cur != NULL; cur = g_slist_next(cur)) {
5627                 if (GPOINTER_TO_INT(cur->data) == 0)
5628                         continue;
5629
5630                 item_count ++;
5631
5632                 last = GPOINTER_TO_INT(cur->data);
5633                 if (cur->next)
5634                         next = GPOINTER_TO_INT(cur->next->data);
5635                 else
5636                         next = 0;
5637
5638                 if (last + 1 != next || next == 0 || item_count >= folder->max_set_size) {
5639
5640                         struct mailimap_set_item * item;
5641                         item = mailimap_set_item_new(first, last);
5642                         mailimap_set_add(current_set, item);
5643
5644                         first = next;
5645
5646                         if (item_count >= folder->max_set_size) {
5647                                 if (ret_list == NULL)
5648                                         llast = ret_list = g_slist_append(ret_list,
5649                                                           current_set);
5650                                 else {
5651                                         llast = g_slist_append(llast, current_set);
5652                                         llast = llast->next;
5653                                 }
5654
5655                                 current_set = mailimap_set_new_empty();
5656                                 item_count = 0;
5657                         }
5658                 }
5659         }
5660
5661         if (clist_count(current_set->set_list) > 0) {
5662                 ret_list = g_slist_append(ret_list,
5663                                           current_set);
5664         }
5665
5666         g_slist_free(sorted_list);
5667
5668         return ret_list;
5669 }
5670
5671 static GSList * imap_get_lep_set_from_msglist(IMAPFolder *folder, MsgInfoList *msglist)
5672 {
5673         MsgNumberList *numlist = NULL;
5674         GSList *seq_list;
5675
5676         numlist = procmsg_get_number_list_for_msgs(msglist);
5677
5678         seq_list = imap_get_lep_set_from_numlist(folder, numlist);
5679         g_slist_free(numlist);
5680
5681         return seq_list;
5682 }
5683
5684 static GSList * imap_uid_list_from_lep(clist * list, gint* length)
5685 {
5686         clistiter * iter;
5687         GSList * result;
5688         gint len = 0;
5689
5690         result = NULL;
5691
5692         if (list) {
5693                 for(iter = clist_begin(list) ; iter != NULL ;
5694                     iter = clist_next(iter)) {
5695                         uint32_t * puid;
5696
5697                         puid = clist_content(iter);
5698                         result = g_slist_prepend(result, GINT_TO_POINTER(* puid));
5699                         len++;
5700                 }
5701                 result = g_slist_reverse(result);
5702         }
5703         if (length)
5704                 *length = len;
5705         return result;
5706 }
5707
5708 static GSList * imap_uid_list_from_lep_tab(carray * list)
5709 {
5710         unsigned int i;
5711         GSList * result;
5712
5713         result = NULL;
5714
5715         for(i = 0 ; i < carray_count(list) ; i ++) {
5716                 uint32_t * puid;
5717
5718                 puid = carray_get(list, i);
5719                 result = g_slist_prepend(result, GINT_TO_POINTER(* puid));
5720         }
5721         result = g_slist_reverse(result);
5722         return result;
5723 }
5724
5725 static void imap_flags_hash_from_lep_uid_flags_tab(carray * list,
5726                                                    GHashTable * hash,
5727                                                    GHashTable * tags_hash)
5728 {
5729         unsigned int i;
5730
5731         for(i = 0 ; i < carray_count(list) ; i += 3) {
5732                 uint32_t * puid;
5733                 int * pflags;
5734                 GSList *tags;
5735
5736                 puid = carray_get(list, i);
5737                 pflags = carray_get(list, i + 1);
5738                 tags = carray_get(list, i + 2);
5739
5740                 g_hash_table_insert(hash, GINT_TO_POINTER(*puid), GINT_TO_POINTER(* pflags));
5741                 g_hash_table_insert(tags_hash, GINT_TO_POINTER(*puid), tags);
5742         }
5743 }
5744
5745 static MsgInfo *imap_envelope_from_lep(struct imap_fetch_env_info * info,
5746                                        FolderItem *item)
5747 {
5748         MsgInfo *msginfo = NULL;
5749         guint32 uid = 0;
5750         goffset size = 0;
5751         MsgFlags flags = {0, 0};
5752
5753         if (info->headers == NULL)
5754                 return NULL;
5755
5756         MSG_SET_TMP_FLAGS(flags, MSG_IMAP);
5757         if (folder_has_parent_of_type(item, F_QUEUE)) {
5758                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
5759         } else if (folder_has_parent_of_type(item, F_DRAFT)) {
5760                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
5761         }
5762         flags.perm_flags = info->flags;
5763
5764         uid = info->uid;
5765         size = (goffset) info->size;
5766         msginfo = procheader_parse_str(info->headers, flags, FALSE, FALSE);
5767
5768         if (msginfo) {
5769                 msginfo->msgnum = uid;
5770                 msginfo->size = size;
5771         }
5772
5773         return msginfo;
5774 }
5775
5776 static void imap_lep_set_free(GSList *seq_list)
5777 {
5778         GSList * cur;
5779
5780         for(cur = seq_list ; cur != NULL ; cur = g_slist_next(cur)) {
5781                 struct mailimap_set * imapset;
5782
5783                 imapset = cur->data;
5784                 mailimap_set_free(imapset);
5785         }
5786         g_slist_free(seq_list);
5787 }
5788
5789 static struct mailimap_flag_list * imap_flag_to_lep(IMAPFolderItem *item, IMAPFlags flags, GSList *tags)
5790 {
5791         struct mailimap_flag_list * flag_list;
5792         GSList *cur = tags;
5793
5794         flag_list = mailimap_flag_list_new_empty();
5795
5796         if (IMAP_IS_SEEN(flags))
5797                 mailimap_flag_list_add(flag_list,
5798                                        mailimap_flag_new_seen());
5799         if (IMAP_IS_ANSWERED(flags))
5800                 mailimap_flag_list_add(flag_list,
5801                                        mailimap_flag_new_answered());
5802         if (IMAP_IS_FLAGGED(flags))
5803                 mailimap_flag_list_add(flag_list,
5804                                        mailimap_flag_new_flagged());
5805         if (IMAP_IS_DELETED(flags))
5806                 mailimap_flag_list_add(flag_list,
5807                                        mailimap_flag_new_deleted());
5808         if (IMAP_IS_DRAFT(flags))
5809                 mailimap_flag_list_add(flag_list,
5810                                        mailimap_flag_new_draft());
5811         if (IMAP_IS_FORWARDED(flags) && flag_ok(item, IMAP_FLAG_FORWARDED))
5812                 mailimap_flag_list_add(flag_list,
5813                                        mailimap_flag_new_flag_keyword(strdup(RTAG_FORWARDED)));
5814         if (IMAP_IS_SPAM(flags) && flag_ok(item, IMAP_FLAG_SPAM))
5815                 mailimap_flag_list_add(flag_list,
5816                                        mailimap_flag_new_flag_keyword(strdup(RTAG_JUNK)));
5817         else if (IMAP_IS_HAM(flags) && flag_ok(item, IMAP_FLAG_HAM))
5818                 mailimap_flag_list_add(flag_list,
5819                                        mailimap_flag_new_flag_keyword(strdup(RTAG_NON_JUNK)));
5820
5821         for (; cur; cur = cur->next) {
5822                 gchar *enc_str =
5823                         imap_utf8_to_modified_utf7(cur->data, TRUE);
5824                 g_strstrip(enc_str);
5825
5826                 mailimap_flag_list_add(flag_list,
5827                         mailimap_flag_new_flag_keyword(enc_str));
5828         }
5829
5830         return flag_list;
5831 }
5832
5833 guint imap_folder_get_refcnt(Folder *folder)
5834 {
5835         return ((IMAPFolder *)folder)->refcnt;
5836 }
5837
5838 void imap_folder_ref(Folder *folder)
5839 {
5840         ((IMAPFolder *)folder)->refcnt++;
5841 }
5842
5843 void imap_disconnect_all(gboolean have_connectivity)
5844 {
5845         GList *list;
5846         gboolean short_timeout;
5847 #ifdef HAVE_NETWORKMANAGER_SUPPORT
5848         GError *error;
5849 #endif
5850
5851 #ifdef HAVE_NETWORKMANAGER_SUPPORT
5852         error = NULL;
5853         short_timeout = !networkmanager_is_online(&error);
5854         if(error) {
5855                 short_timeout = TRUE;
5856                 g_error_free(error);
5857         }
5858 #else
5859         short_timeout = TRUE;
5860 #endif
5861
5862         if(short_timeout)
5863                 imap_main_set_timeout(1);
5864
5865         for (list = account_get_list(); list != NULL; list = list->next) {
5866                 PrefsAccount *account = list->data;
5867                 if (account->protocol == A_IMAP4) {
5868                         RemoteFolder *folder = (RemoteFolder *)account->folder;
5869                         if (folder && folder->session) {
5870                                 if (imap_is_busy(FOLDER(folder)))
5871                                         imap_threaded_cancel(FOLDER(folder));
5872
5873                                 IMAPSession *session = (IMAPSession *)folder->session;
5874                                 if (have_connectivity)
5875                                         imap_threaded_disconnect(FOLDER(folder));
5876                                 SESSION(session)->state = SESSION_DISCONNECTED;
5877                                 SESSION(session)->sock = NULL;
5878                                 imap_safe_destroy(session);
5879                                 folder->session = NULL;
5880                         }
5881                 }
5882         }
5883
5884         if(short_timeout)
5885                 imap_main_set_timeout(prefs_common.io_timeout_secs);
5886 }
5887
5888 void imap_folder_unref(Folder *folder)
5889 {
5890         if (((IMAPFolder *)folder)->refcnt > 0)
5891                 ((IMAPFolder *)folder)->refcnt--;
5892 }
5893
5894 void imap_cancel_all(void)
5895 {
5896         GList *folderlist;
5897         GList *cur;
5898
5899         folderlist = folder_get_list();
5900         for (cur = folderlist; cur != NULL; cur = g_list_next(cur)) {
5901                 Folder *folder = (Folder *) cur->data;
5902
5903                 if (folder->klass == &imap_class) {
5904                         if (imap_is_busy(folder)) {
5905                                 IMAPSession *imap_session;
5906                                 RemoteFolder *rfolder;
5907
5908                                 g_printerr("cancelled\n");
5909                                 imap_threaded_cancel(folder);
5910                                 rfolder = (RemoteFolder *) folder;
5911                                 imap_session = (IMAPSession *) rfolder->session;
5912                                 if (imap_session)
5913                                         imap_session->cancelled = 1;
5914                         }
5915                 }
5916         }
5917 }
5918
5919 gboolean imap_cancel_all_enabled(void)
5920 {
5921         GList *folderlist;
5922         GList *cur;
5923
5924         folderlist = folder_get_list();
5925         for (cur = folderlist; cur != NULL; cur = g_list_next(cur)) {
5926                 Folder *folder = (Folder *) cur->data;
5927
5928                 if (folder->klass == &imap_class) {
5929                         if (imap_is_busy(folder)) {
5930                                 return TRUE;
5931                         }
5932                 }
5933         }
5934
5935         return FALSE;
5936 }
5937
5938 static gboolean imap_is_busy(Folder *folder)
5939 {
5940         IMAPSession *imap_session;
5941         RemoteFolder *rfolder;
5942
5943         rfolder = (RemoteFolder *) folder;
5944         imap_session = (IMAPSession *) rfolder->session;
5945         if (imap_session == NULL)
5946                 return FALSE;
5947
5948         return imap_session->busy;
5949 }
5950
5951 #else /* HAVE_LIBETPAN */
5952
5953 static FolderClass imap_class;
5954
5955 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item);
5956 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag);
5957
5958 static Folder   *imap_folder_new        (const gchar    *name,
5959                                          const gchar    *path)
5960 {
5961         static gboolean missing_imap_warning = TRUE;
5962         if (missing_imap_warning) {
5963                 missing_imap_warning = FALSE;
5964                 alertpanel_error(
5965                         _("You have one or more IMAP accounts "
5966                           "defined. However this version of "
5967                           "Claws Mail has been built without "
5968                           "IMAP support; your IMAP account(s) are "
5969                           "disabled.\n\n"
5970                           "You probably need to "
5971                           "install libetpan and recompile "
5972                           "Claws Mail."));
5973         }
5974         return NULL;
5975 }
5976 static gint     imap_create_tree        (Folder         *folder)
5977 {
5978         return -1;
5979 }
5980 static FolderItem *imap_create_folder   (Folder         *folder,
5981                                          FolderItem     *parent,
5982                                          const gchar    *name)
5983 {
5984         return NULL;
5985 }
5986 static gint     imap_rename_folder      (Folder         *folder,
5987                                          FolderItem     *item,
5988                                          const gchar    *name)
5989 {
5990         return -1;
5991 }
5992
5993 gchar imap_get_path_separator_for_item(FolderItem *item)
5994 {
5995         return '/';
5996 }
5997
5998 FolderClass *imap_get_class(void)
5999 {
6000         if (imap_class.idstr == NULL) {
6001                 imap_class.type = F_IMAP;
6002                 imap_class.idstr = "imap";
6003                 imap_class.uistr = "IMAP4";
6004
6005                 imap_class.new_folder = imap_folder_new;
6006                 imap_class.create_tree = imap_create_tree;
6007                 imap_class.create_folder = imap_create_folder;
6008                 imap_class.rename_folder = imap_rename_folder;
6009
6010                 imap_class.set_xml = folder_set_xml;
6011                 imap_class.get_xml = folder_get_xml;
6012                 imap_class.item_set_xml = imap_item_set_xml;
6013                 imap_class.item_get_xml = imap_item_get_xml;
6014                 /* nothing implemented */
6015         }
6016
6017         return &imap_class;
6018 }
6019
6020 void imap_disconnect_all(gboolean have_connectivity)
6021 {
6022 }
6023
6024 gint imap_subscribe(Folder *folder, FolderItem *item, gchar *rpath, gboolean sub)
6025 {
6026         return -1;
6027 }
6028
6029 GList * imap_scan_subtree(Folder *folder, FolderItem *item, gboolean unsubs_only, gboolean recursive)
6030 {
6031         return NULL;
6032 }
6033
6034 void imap_cache_msg(FolderItem *item, gint msgnum)
6035 {
6036 }
6037
6038 void imap_cancel_all(void)
6039 {
6040 }
6041
6042 gboolean imap_cancel_all_enabled(void)
6043 {
6044         return FALSE;
6045 }
6046
6047 #endif
6048
6049 #ifdef HAVE_LIBETPAN
6050 static void imap_synchronise(FolderItem *item, gint days)
6051 {
6052         if (IMAP_FOLDER_ITEM(item)->last_sync == IMAP_FOLDER_ITEM(item)->last_change) {
6053                 debug_print("%s already synced\n", item->path?item->path:item->name);
6054                 return;
6055         }
6056         debug_print("syncing %s\n", item->path?item->path:item->name);
6057         imap_gtk_synchronise(item, days);
6058         IMAP_FOLDER_ITEM(item)->last_sync = IMAP_FOLDER_ITEM(item)->last_change;
6059 }
6060 #endif
6061
6062 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag)
6063 {
6064 #ifdef HAVE_LIBETPAN
6065         GList *cur;
6066 #endif
6067         folder_item_set_xml(folder, item, tag);
6068
6069 #ifdef HAVE_LIBETPAN
6070         for (cur = tag->attr; cur != NULL; cur = g_list_next(cur)) {
6071                 XMLAttr *attr = (XMLAttr *) cur->data;
6072
6073                 if (!attr || !attr->name || !attr->value) continue;
6074                 if (!strcmp(attr->name, "uidnext"))
6075                         IMAP_FOLDER_ITEM(item)->uid_next = atoi(attr->value);
6076                 if (!strcmp(attr->name, "last_sync"))
6077                         IMAP_FOLDER_ITEM(item)->last_sync = atoi(attr->value);
6078                 if (!strcmp(attr->name, "last_change"))
6079                         IMAP_FOLDER_ITEM(item)->last_change = atoi(attr->value);
6080         }
6081         if (IMAP_FOLDER_ITEM(item)->last_change == 0)
6082                 IMAP_FOLDER_ITEM(item)->last_change = time(NULL);
6083 #endif
6084 }
6085
6086 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item)
6087 {
6088         XMLTag *tag;
6089
6090         tag = folder_item_get_xml(folder, item);
6091
6092 #ifdef HAVE_LIBETPAN
6093         xml_tag_add_attr(tag, xml_attr_new_int("uidnext",
6094                         IMAP_FOLDER_ITEM(item)->uid_next));
6095         xml_tag_add_attr(tag, xml_attr_new_int("last_sync",
6096                         IMAP_FOLDER_ITEM(item)->last_sync));
6097         xml_tag_add_attr(tag, xml_attr_new_int("last_change",
6098                         IMAP_FOLDER_ITEM(item)->last_change));
6099
6100 #endif
6101         return tag;
6102 }
6103
6104 /* ===================================================================
6105  * UTF-7 conversion routines as in RFC 2192
6106  * ===================================================================
6107  * These two functions from:
6108  * libimap library.
6109  * Copyright (C) 2003-2004 Pawel Salek. */
6110
6111 /* UTF7 modified base64 alphabet */
6112 static char base64chars[] =
6113   "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+,";
6114 #define UNDEFINED 64
6115
6116 /* UTF16 definitions */
6117 #define UTF16MASK       0x03FFUL
6118 #define UTF16SHIFT      10
6119 #define UTF16BASE       0x10000UL
6120 #define UTF16HIGHSTART  0xD800UL
6121 #define UTF16HIGHEND    0xDBFFUL
6122 #define UTF16LOSTART    0xDC00UL
6123 #define UTF16LOEND      0xDFFFUL
6124
6125
6126 /* Convert an IMAP mailbox to a UTF-8 string.
6127  *  dst needs to have roughly 4 times the storage space of src
6128  *    Hex encoding can triple the size of the input
6129  *    UTF-7 can be slightly denser than UTF-8
6130  *     (worst case: 8 octets UTF-7 becomes 9 octets UTF-8)
6131  */
6132 char* imap_modified_utf7_to_utf8(const char *mbox, gboolean change_spaces)
6133 {
6134   unsigned c, i, bitcount;
6135   unsigned long ucs4, utf16, bitbuf;
6136   unsigned char base64[256];
6137   const char *src;
6138   char *dst, *res  = g_malloc(2*strlen(mbox)+1);
6139
6140   dst = res;
6141   src = mbox;
6142   if(!dst) return NULL;
6143   /* initialize modified base64 decoding table */
6144   memset(base64, UNDEFINED, sizeof (base64));
6145   for (i = 0; i < sizeof (base64chars); ++i) {
6146     base64[(unsigned)base64chars[i]] = i;
6147   }
6148
6149   /* loop until end of string */
6150   while (*src != '\0') {
6151     c = *src++;
6152     /* deal with literal characters and &- */
6153     if (c != '&' || *src == '-') {
6154       /* encode literally */
6155       if (change_spaces && c == '_')
6156         *dst++ = ' ';
6157       else
6158         *dst++ = c;
6159       /* skip over the '-' if this is an &- sequence */
6160       if (c == '&') ++src;
6161     } else {
6162       /* convert modified UTF-7 -> UTF-16 -> UCS-4 -> UTF-8 -> HEX */
6163       bitbuf = 0;
6164       bitcount = 0;
6165       ucs4 = 0;
6166       while ((c = base64[(unsigned char) *src]) != UNDEFINED) {
6167         ++src;
6168         bitbuf = (bitbuf << 6) | c;
6169         bitcount += 6;
6170         /* enough bits for a UTF-16 character? */
6171         if (bitcount >= 16) {
6172           bitcount -= 16;
6173           utf16 = (bitcount ? bitbuf >> bitcount
6174                    : bitbuf) & 0xffff;
6175           /* convert UTF16 to UCS4 */
6176           if
6177             (utf16 >= UTF16HIGHSTART && utf16 <= UTF16HIGHEND) {
6178             ucs4 = (utf16 - UTF16HIGHSTART) << UTF16SHIFT;
6179             continue;
6180           } else if
6181             (utf16 >= UTF16LOSTART && utf16 <= UTF16LOEND) {
6182             ucs4 += utf16 - UTF16LOSTART + UTF16BASE;
6183           } else {
6184             ucs4 = utf16;
6185           }
6186
6187           /* convert UTF-16 range of UCS4 to UTF-8 */
6188           if (ucs4 <= 0x7fUL) {
6189             dst[0] = ucs4;
6190             dst += 1;
6191           } else if (ucs4 <= 0x7ffUL) {
6192             dst[0] = 0xc0 | (ucs4 >> 6);
6193             dst[1] = 0x80 | (ucs4 & 0x3f);
6194             dst += 2;
6195           } else if (ucs4 <= 0xffffUL) {
6196             dst[0] = 0xe0 | (ucs4 >> 12);
6197             dst[1] = 0x80 | ((ucs4 >> 6) & 0x3f);
6198             dst[2] = 0x80 | (ucs4 & 0x3f);
6199             dst += 3;
6200           } else {
6201             dst[0] = 0xf0 | (ucs4 >> 18);
6202             dst[1] = 0x80 | ((ucs4 >> 12) & 0x3f);
6203             dst[2] = 0x80 | ((ucs4 >> 6) & 0x3f);
6204             dst[3] = 0x80 | (ucs4 & 0x3f);
6205             dst += 4;
6206           }
6207         }
6208       }
6209       /* skip over trailing '-' in modified UTF-7 encoding */
6210       if (*src == '-') ++src;
6211     }
6212   }
6213   /* terminate destination string */
6214   *dst = '\0';
6215   return res;
6216 }
6217
6218 /* Convert hex coded UTF-8 string to modified UTF-7 IMAP mailbox
6219  *  dst should be about twice the length of src to deal with non-hex
6220  *  coded URLs
6221  */
6222 char* imap_utf8_to_modified_utf7(const char *src, gboolean change_spaces)
6223 {
6224   unsigned int utf8pos, utf8total, c, utf7mode, bitstogo, utf16flag;
6225   unsigned long ucs4 = 0, bitbuf = 0;
6226
6227   /* initialize hex lookup table */
6228   char *dst, *res;
6229
6230   if (!src) return NULL;
6231
6232   res = malloc(2*strlen(src)+1);
6233   dst = res;
6234   if(!dst) return NULL;
6235
6236   utf7mode = 0;
6237   utf8total = 0;
6238   bitstogo = 0;
6239   utf8pos = 0;
6240   while ((c = (unsigned char)*src) != '\0') {
6241     ++src;
6242     /* normal character? */
6243     if (c >= ' ' && c <= '~' && (c != '_' || !change_spaces)) {
6244       /* switch out of UTF-7 mode */
6245       if (utf7mode) {
6246         if (bitstogo) {
6247           *dst++ = base64chars[(bitbuf << (6 - bitstogo)) & 0x3F];
6248         }
6249         *dst++ = '-';
6250         utf7mode = 0;
6251         utf8pos  = 0;
6252         bitstogo = 0;
6253         utf8total= 0;
6254       }
6255       if (change_spaces && c == ' ')
6256         *dst++ = '_';
6257       else
6258         *dst++ = c;
6259       /* encode '&' as '&-' */
6260       if (c == '&') {
6261         *dst++ = '-';
6262       }
6263       continue;
6264     }
6265     /* switch to UTF-7 mode */
6266     if (!utf7mode) {
6267       *dst++ = '&';
6268       utf7mode = 1;
6269     }
6270     /* Encode US-ASCII characters as themselves */
6271     if (c < 0x80) {
6272       ucs4 = c;
6273     } else if (utf8total) {
6274       /* save UTF8 bits into UCS4 */
6275       ucs4 = (ucs4 << 6) | (c & 0x3FUL);
6276       if (++utf8pos < utf8total) {
6277         continue;
6278       }
6279     } else {
6280       utf8pos = 1;
6281       if (c < 0xE0) {
6282         utf8total = 2;
6283         ucs4 = c & 0x1F;
6284       } else if (c < 0xF0) {
6285         utf8total = 3;
6286         ucs4 = c & 0x0F;
6287       } else {
6288         /* NOTE: can't convert UTF8 sequences longer than 4 */
6289         utf8total = 4;
6290         ucs4 = c & 0x03;
6291       }
6292       continue;
6293     }
6294     /* loop to split ucs4 into two utf16 chars if necessary */
6295     utf8total = 0;
6296     do {
6297       if (ucs4 >= UTF16BASE) {
6298         ucs4 -= UTF16BASE;
6299         bitbuf = (bitbuf << 16) | ((ucs4 >> UTF16SHIFT)
6300                                    + UTF16HIGHSTART);
6301         ucs4 = (ucs4 & UTF16MASK) + UTF16LOSTART;
6302         utf16flag = 1;
6303       } else {
6304         bitbuf = (bitbuf << 16) | ucs4;
6305         utf16flag = 0;
6306       }
6307       bitstogo += 16;
6308       /* spew out base64 */
6309       while (bitstogo >= 6) {
6310         bitstogo -= 6;
6311         *dst++ = base64chars[(bitstogo ? (bitbuf >> bitstogo)
6312                               : bitbuf)
6313                              & 0x3F];
6314       }
6315     } while (utf16flag);
6316   }
6317   /* if in UTF-7 mode, finish in ASCII */
6318   if (utf7mode) {
6319     if (bitstogo) {
6320       *dst++ = base64chars[(bitbuf << (6 - bitstogo)) & 0x3F];
6321     }
6322     *dst++ = '-';
6323   }
6324   /* tie off string */
6325   *dst = '\0';
6326   return res;
6327 }