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