src/imap.c

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