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