src/imap.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2007 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 #endif
  23
  24 #include "defs.h"
  25
  26 #include <glib.h>
  27 #include <glib/gi18n.h>
  28 #include <stdio.h>
  29 #include <string.h>
  30 #include "imap.h"
  31 #include "imap_gtk.h"
  32 #include "inc.h"
  33 #include "xml.h"
  34 #include "alertpanel.h"
  35
  36 #ifdef HAVE_LIBETPAN
  37
  38 #include <stdlib.h>
  39 #include <dirent.h>
  40 #include <unistd.h>
  41 #include <ctype.h>
  42 #include <time.h>
  43 #include <errno.h>
  44 #if HAVE_ICONV
  45 #  include <iconv.h>
  46 #endif
  47
  48 #if (defined(USE_OPENSSL) || defined (USE_GNUTLS))
  49 #  include "ssl.h"
  50 #endif
  51
  52 #include "folder.h"
  53 #include "session.h"
  54 #include "procmsg.h"
  55 #include "socket.h"
  56 #include "recv.h"
  57 #include "procheader.h"
  58 #include "prefs_account.h"
  59 #include "codeconv.h"
  60 #include "md5.h"
  61 #include "base64.h"
  62 #include "utils.h"
  63 #include "prefs_common.h"
  64 #include "inputdialog.h"
  65 #include "log.h"
  66 #include "remotefolder.h"
  67 #include "claws.h"
  68 #include "statusbar.h"
  69 #include "msgcache.h"
  70 #include "imap-thread.h"
  71 #include "account.h"
  72
  73 typedef struct _IMAPFolder      IMAPFolder;
  74 typedef struct _IMAPSession     IMAPSession;
  75 typedef struct _IMAPNameSpace   IMAPNameSpace;
  76 typedef struct _IMAPFolderItem  IMAPFolderItem;
  77
  78 #include "prefs_account.h"
  79
  80 #define IMAP_FOLDER(obj)        ((IMAPFolder *)obj)
  81 #define IMAP_FOLDER_ITEM(obj)   ((IMAPFolderItem *)obj)
  82 #define IMAP_SESSION(obj)       ((IMAPSession *)obj)
  83
  84 struct _IMAPFolder
  85 {
  86         RemoteFolder rfolder;
  87
  88         /* list of IMAPNameSpace */
  89         GList *ns_personal;
  90         GList *ns_others;
  91         GList *ns_shared;
  92         gchar last_seen_separator;
  93         guint refcnt;
  94 };
  95
  96 struct _IMAPSession
  97 {
  98         Session session;
  99
 100         gboolean authenticated;
 101
 102         GSList *capability;
 103         gboolean uidplus;
 104
 105         gchar *mbox;
 106         guint cmd_count;
 107
 108         /* CLAWS */
 109         gboolean folder_content_changed;
 110         guint exists;
 111         guint recent;
 112         guint expunge;
 113         guint unseen;
 114         guint uid_validity;
 115         guint uid_next;
 116
 117         Folder * folder;
 118         gboolean busy;
 119         gboolean cancelled;
 120         gboolean sens_update_block;
 121 };
 122
 123 struct _IMAPNameSpace
 124 {
 125         gchar *name;
 126         gchar separator;
 127 };
 128
 129 #define IMAP_SUCCESS    0
 130 #define IMAP_SOCKET     2
 131 #define IMAP_AUTHFAIL   3
 132 #define IMAP_PROTOCOL   4
 133 #define IMAP_SYNTAX     5
 134 #define IMAP_IOERR      6
 135 #define IMAP_ERROR      7
 136
 137 #define IMAPBUFSIZE     8192
 138
 139 typedef enum
 140 {
 141         IMAP_FLAG_SEEN          = 1 << 0,
 142         IMAP_FLAG_ANSWERED      = 1 << 1,
 143         IMAP_FLAG_FLAGGED       = 1 << 2,
 144         IMAP_FLAG_DELETED       = 1 << 3,
 145         IMAP_FLAG_DRAFT         = 1 << 4
 146 } IMAPFlags;
 147
 148 #define IMAP_IS_SEEN(flags)     ((flags & IMAP_FLAG_SEEN) != 0)
 149 #define IMAP_IS_ANSWERED(flags) ((flags & IMAP_FLAG_ANSWERED) != 0)
 150 #define IMAP_IS_FLAGGED(flags)  ((flags & IMAP_FLAG_FLAGGED) != 0)
 151 #define IMAP_IS_DELETED(flags)  ((flags & IMAP_FLAG_DELETED) != 0)
 152 #define IMAP_IS_DRAFT(flags)    ((flags & IMAP_FLAG_DRAFT) != 0)
 153
 154
 155 #define IMAP4_PORT      143
 156 #if (defined(USE_OPENSSL) || defined (USE_GNUTLS))
 157 #define IMAPS_PORT      993
 158 #endif
 159
 160 #define IMAP_CMD_LIMIT  1000
 161
 162 struct _IMAPFolderItem
 163 {
 164         FolderItem item;
 165
 166         guint lastuid;
 167         guint uid_next;
 168         GSList *uid_list;
 169         gboolean batching;
 170
 171         GHashTable *flags_set_table;
 172         GHashTable *flags_unset_table;
 173         guint32 last_change;
 174         guint32 last_sync;
 175         gboolean should_update;
 176         gboolean should_trash_cache;
 177 };
 178
 179 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item);
 180 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag);
 181
 182 static void imap_folder_init            (Folder         *folder,
 183                                          const gchar    *name,
 184                                          const gchar    *path);
 185
 186 static Folder   *imap_folder_new        (const gchar    *name,
 187                                          const gchar    *path);
 188 static void      imap_folder_destroy    (Folder         *folder);
 189
 190 static IMAPSession *imap_session_new    (Folder         *folder,
 191                                          const PrefsAccount     *account);
 192 static void     imap_session_authenticate(IMAPSession           *session,
 193                                           const PrefsAccount    *account);
 194 static void     imap_session_destroy    (Session        *session);
 195
 196 static gchar   *imap_fetch_msg          (Folder         *folder,
 197                                          FolderItem     *item,
 198                                          gint            uid);
 199 static gchar   *imap_fetch_msg_full     (Folder         *folder,
 200                                          FolderItem     *item,
 201                                          gint            uid,
 202                                          gboolean        headers,
 203                                          gboolean        body);
 204 static void     imap_remove_cached_msg  (Folder         *folder,
 205                                          FolderItem     *item,
 206                                          MsgInfo        *msginfo);
 207 static gint     imap_add_msg            (Folder         *folder,
 208                                          FolderItem     *dest,
 209                                          const gchar    *file,
 210                                          MsgFlags       *flags);
 211 static gint     imap_add_msgs           (Folder         *folder,
 212                                          FolderItem     *dest,
 213                                          GSList         *file_list,
 214                                          GRelation      *relation);
 215
 216 static gint     imap_copy_msg           (Folder         *folder,
 217                                          FolderItem     *dest,
 218                                          MsgInfo        *msginfo);
 219 static gint     imap_copy_msgs          (Folder         *folder,
 220                                          FolderItem     *dest,
 221                                          MsgInfoList    *msglist,
 222                                          GRelation      *relation);
 223
 224 static gint     imap_remove_msg         (Folder         *folder,
 225                                          FolderItem     *item,
 226                                          gint            uid);
 227 static gint     imap_remove_msgs        (Folder         *folder,
 228                                          FolderItem     *dest,
 229                                          MsgInfoList    *msglist,
 230                                          GRelation      *relation);
 231 static gint     imap_remove_all_msg     (Folder         *folder,
 232                                          FolderItem     *item);
 233
 234 static gboolean imap_is_msg_changed     (Folder         *folder,
 235                                          FolderItem     *item,
 236                                          MsgInfo        *msginfo);
 237
 238 static gint     imap_close              (Folder         *folder,
 239                                          FolderItem     *item);
 240
 241 static gint     imap_scan_tree          (Folder         *folder);
 242
 243 static gint     imap_create_tree        (Folder         *folder);
 244
 245 static FolderItem *imap_create_folder   (Folder         *folder,
 246                                          FolderItem     *parent,
 247                                          const gchar    *name);
 248 static gint     imap_rename_folder      (Folder         *folder,
 249                                          FolderItem     *item,
 250                                          const gchar    *name);
 251 static gint     imap_remove_folder      (Folder         *folder,
 252                                          FolderItem     *item);
 253
 254 static FolderItem *imap_folder_item_new (Folder         *folder);
 255 static void imap_folder_item_destroy    (Folder         *folder,
 256                                          FolderItem     *item);
 257
 258 static IMAPSession *imap_session_get    (Folder         *folder);
 259
 260 static gint imap_auth                   (IMAPSession    *session,
 261                                          const gchar    *user,
 262                                          const gchar    *pass,
 263                                          IMAPAuthType    type);
 264
 265 static gint imap_scan_tree_recursive    (IMAPSession    *session,
 266                                          FolderItem     *item,
 267                                          gboolean        subs_only);
 268
 269 static void imap_create_missing_folders (Folder         *folder);
 270 static FolderItem *imap_create_special_folder
 271                                         (Folder                 *folder,
 272                                          SpecialFolderItemType   stype,
 273                                          const gchar            *name);
 274
 275 static gint imap_do_copy_msgs           (Folder         *folder,
 276                                          FolderItem     *dest,
 277                                          MsgInfoList    *msglist,
 278                                          GRelation      *relation);
 279
 280 static void imap_delete_all_cached_messages     (FolderItem     *item);
 281 static void imap_set_batch              (Folder         *folder,
 282                                          FolderItem     *item,
 283                                          gboolean        batch);
 284 static gint imap_set_message_flags      (IMAPSession    *session,
 285                                          MsgNumberList  *numlist,
 286                                          IMAPFlags       flags,
 287                                          gboolean        is_set);
 288 static gint imap_select                 (IMAPSession    *session,
 289                                          IMAPFolder     *folder,
 290                                          const gchar    *path,
 291                                          gint           *exists,
 292                                          gint           *recent,
 293                                          gint           *unseen,
 294                                          guint32        *uid_validity,
 295                                          gboolean        block);
 296 static gint imap_status                 (IMAPSession    *session,
 297                                          IMAPFolder     *folder,
 298                                          const gchar    *path,
 299                                          IMAPFolderItem *item,
 300                                          gint           *messages,
 301                                          guint32        *uid_next,
 302                                          guint32        *uid_validity,
 303                                          gint           *unseen,
 304                                          gboolean        block);
 305
 306 static gchar imap_get_path_separator            (IMAPSession    *session,
 307                                                  IMAPFolder     *folder,
 308                                                  const gchar    *path);
 309 static gchar *imap_get_real_path                (IMAPSession    *session,
 310                                                  IMAPFolder     *folder,
 311                                                  const gchar    *path);
 312 #ifdef HAVE_LIBETPAN
 313 static void imap_synchronise            (FolderItem     *item, gint days);
 314 #endif
 315 static gboolean imap_is_busy            (Folder *folder);
 316
 317 static void imap_free_capabilities      (IMAPSession    *session);
 318
 319 /* low-level IMAP4rev1 commands */
 320 static gint imap_cmd_login      (IMAPSession    *session,
 321                                  const gchar    *user,
 322                                  const gchar    *pass,
 323                                  const gchar    *type);
 324 static gint imap_cmd_noop       (IMAPSession    *session);
 325 #if (defined(USE_OPENSSL) || defined (USE_GNUTLS))
 326 static gint imap_cmd_starttls   (IMAPSession    *session);
 327 #endif
 328 static gint imap_cmd_select     (IMAPSession    *session,
 329                                  const gchar    *folder,
 330                                  gint           *exists,
 331                                  gint           *recent,
 332                                  gint           *unseen,
 333                                  guint32        *uid_validity,
 334                                  gboolean        block);
 335 static gint imap_cmd_close      (IMAPSession    *session);
 336 static gint imap_cmd_examine    (IMAPSession    *session,
 337                                  const gchar    *folder,
 338                                  gint           *exists,
 339                                  gint           *recent,
 340                                  gint           *unseen,
 341                                  guint32        *uid_validity,
 342                                  gboolean        block);
 343 static gint imap_cmd_create     (IMAPSession    *sock,
 344                                  const gchar    *folder);
 345 static gint imap_cmd_rename     (IMAPSession    *sock,
 346                                  const gchar    *oldfolder,
 347                                  const gchar    *newfolder);
 348 static gint imap_cmd_delete     (IMAPSession    *session,
 349                                  const gchar    *folder);
 350 static gint imap_cmd_fetch      (IMAPSession    *sock,
 351                                  guint32         uid,
 352                                  const gchar    *filename,
 353                                  gboolean        headers,
 354                                  gboolean        body);
 355 static gint imap_cmd_append     (IMAPSession    *session,
 356                                  const gchar    *destfolder,
 357                                  const gchar    *file,
 358                                  IMAPFlags       flags,
 359                                  guint32        *new_uid);
 360 static gint imap_cmd_copy       (IMAPSession *session,
 361                                  struct mailimap_set * set,
 362                                  const gchar *destfolder,
 363                                  GRelation *uid_mapping,
 364                                  struct mailimap_set ** source,
 365                                  struct mailimap_set ** dest);
 366 static gint imap_cmd_store      (IMAPSession    *session,
 367                                  struct mailimap_set * set,
 368                                  IMAPFlags flags,
 369                                  int do_add);
 370 static gint imap_cmd_expunge    (IMAPSession    *session);
 371
 372 static void imap_path_separator_subst           (gchar          *str,
 373                                                  gchar           separator);
 374
 375 static gchar *imap_utf8_to_modified_utf7        (const gchar    *from);
 376 static gchar *imap_modified_utf7_to_utf8        (const gchar    *mutf7_str);
 377
 378 static gboolean imap_rename_folder_func         (GNode          *node,
 379                                                  gpointer        data);
 380 static gint imap_get_num_list                   (Folder         *folder,
 381                                                  FolderItem     *item,
 382                                                  GSList        **list,
 383                                                  gboolean       *old_uids_valid);
 384 static GSList *imap_get_msginfos                (Folder         *folder,
 385                                                  FolderItem     *item,
 386                                                  GSList         *msgnum_list);
 387 static MsgInfo *imap_get_msginfo                (Folder         *folder,
 388                                                  FolderItem     *item,
 389                                                  gint            num);
 390 static gboolean imap_scan_required              (Folder         *folder,
 391                                                  FolderItem     *item);
 392 static void imap_change_flags                   (Folder         *folder,
 393                                                  FolderItem     *item,
 394                                                  MsgInfo        *msginfo,
 395                                                  MsgPermFlags    newflags);
 396 static gint imap_get_flags                      (Folder         *folder,
 397                                                  FolderItem     *item,
 398                                                  MsgInfoList    *msglist,
 399                                                  GRelation      *msgflags);
 400 static gchar *imap_folder_get_path              (Folder         *folder);
 401 static gchar *imap_item_get_path                (Folder         *folder,
 402                                                  FolderItem     *item);
 403 static MsgInfo *imap_parse_msg(const gchar *file, FolderItem *item);
 404
 405
 406 /* data types conversion libetpan <-> claws */
 407 static GSList * imap_list_from_lep(IMAPFolder * folder,
 408                                    clist * list, const gchar * real_path, gboolean all);
 409 static GSList * imap_get_lep_set_from_numlist(MsgNumberList *numlist);
 410 static GSList * imap_get_lep_set_from_msglist(MsgInfoList *msglist);
 411 static GSList * imap_uid_list_from_lep(clist * list);
 412 static GSList * imap_uid_list_from_lep_tab(carray * list);
 413 static void imap_flags_hash_from_lep_uid_flags_tab(carray * list,
 414                                                    GHashTable * hash);
 415 static MsgInfo *imap_envelope_from_lep(struct imap_fetch_env_info * info,
 416                                        FolderItem *item);
 417 static void imap_lep_set_free(GSList *seq_list);
 418 static struct mailimap_flag_list * imap_flag_to_lep(IMAPFlags flags);
 419
 420 typedef struct _hashtable_data {
 421         IMAPSession *session;
 422         GSList *msglist;
 423         IMAPFolderItem *item;
 424 } hashtable_data;
 425
 426 static FolderClass imap_class;
 427
 428 typedef struct _thread_data {
 429         gchar *server;
 430         gushort port;
 431         gboolean done;
 432         SockInfo *sock;
 433 #if (defined(USE_OPENSSL) || defined (USE_GNUTLS))
 434         SSLType ssl_type;
 435 #endif
 436 } thread_data;
 437
 438 FolderClass *imap_get_class(void)
 439 {
 440         if (imap_class.idstr == NULL) {
 441                 imap_class.type = F_IMAP;
 442                 imap_class.idstr = "imap";
 443                 imap_class.uistr = "IMAP4";
 444
 445                 /* Folder functions */
 446                 imap_class.new_folder = imap_folder_new;
 447                 imap_class.destroy_folder = imap_folder_destroy;
 448                 imap_class.scan_tree = imap_scan_tree;
 449                 imap_class.create_tree = imap_create_tree;
 450
 451                 /* FolderItem functions */
 452                 imap_class.item_new = imap_folder_item_new;
 453                 imap_class.item_destroy = imap_folder_item_destroy;
 454                 imap_class.item_get_path = imap_item_get_path;
 455                 imap_class.create_folder = imap_create_folder;
 456                 imap_class.rename_folder = imap_rename_folder;
 457                 imap_class.remove_folder = imap_remove_folder;
 458                 imap_class.close = imap_close;
 459                 imap_class.get_num_list = imap_get_num_list;
 460                 imap_class.scan_required = imap_scan_required;
 461                 imap_class.set_xml = folder_set_xml;
 462                 imap_class.get_xml = folder_get_xml;
 463                 imap_class.item_set_xml = imap_item_set_xml;
 464                 imap_class.item_get_xml = imap_item_get_xml;
 465
 466                 /* Message functions */
 467                 imap_class.get_msginfo = imap_get_msginfo;
 468                 imap_class.get_msginfos = imap_get_msginfos;
 469                 imap_class.fetch_msg = imap_fetch_msg;
 470                 imap_class.fetch_msg_full = imap_fetch_msg_full;
 471                 imap_class.add_msg = imap_add_msg;
 472                 imap_class.add_msgs = imap_add_msgs;
 473                 imap_class.copy_msg = imap_copy_msg;
 474                 imap_class.copy_msgs = imap_copy_msgs;
 475                 imap_class.remove_msg = imap_remove_msg;
 476                 imap_class.remove_msgs = imap_remove_msgs;
 477                 imap_class.remove_all_msg = imap_remove_all_msg;
 478                 imap_class.is_msg_changed = imap_is_msg_changed;
 479                 imap_class.change_flags = imap_change_flags;
 480                 imap_class.get_flags = imap_get_flags;
 481                 imap_class.set_batch = imap_set_batch;
 482                 imap_class.synchronise = imap_synchronise;
 483                 imap_class.remove_cached_msg = imap_remove_cached_msg;
 484 #ifdef USE_PTREAD
 485                 pthread_mutex_init(&imap_mutex, NULL);
 486 #endif
 487         }
 488
 489         return &imap_class;
 490 }
 491
 492 static Folder *imap_folder_new(const gchar *name, const gchar *path)
 493 {
 494         Folder *folder;
 495
 496         folder = (Folder *)g_new0(IMAPFolder, 1);
 497         folder->klass = &imap_class;
 498         imap_folder_init(folder, name, path);
 499
 500         return folder;
 501 }
 502
 503 static void imap_folder_destroy(Folder *folder)
 504 {
 505         while (imap_folder_get_refcnt(folder) > 0)
 506                 gtk_main_iteration();
 507
 508         folder_remote_folder_destroy(REMOTE_FOLDER(folder));
 509         imap_done(folder);
 510 }
 511
 512 static void imap_folder_init(Folder *folder, const gchar *name,
 513                              const gchar *path)
 514 {
 515         folder_remote_folder_init((Folder *)folder, name, path);
 516 }
 517
 518 static FolderItem *imap_folder_item_new(Folder *folder)
 519 {
 520         IMAPFolderItem *item;
 521
 522         item = g_new0(IMAPFolderItem, 1);
 523         item->lastuid = 0;
 524         item->uid_next = 0;
 525         item->uid_list = NULL;
 526
 527         return (FolderItem *)item;
 528 }
 529
 530 static void imap_folder_item_destroy(Folder *folder, FolderItem *_item)
 531 {
 532         IMAPFolderItem *item = (IMAPFolderItem *)_item;
 533
 534         g_return_if_fail(item != NULL);
 535         g_slist_free(item->uid_list);
 536
 537         g_free(_item);
 538 }
 539
 540 static gboolean imap_reset_uid_lists_func(GNode *node, gpointer data)
 541 {
 542         IMAPFolderItem *item = (IMAPFolderItem *)node->data;
 543
 544         item->lastuid = 0;
 545         g_slist_free(item->uid_list);
 546         item->uid_list = NULL;
 547
 548         return FALSE;
 549 }
 550
 551 static void imap_reset_uid_lists(Folder *folder)
 552 {
 553         if(folder->node == NULL)
 554                 return;
 555
 556         /* Destroy all uid lists and rest last uid */
 557         g_node_traverse(folder->node, G_IN_ORDER, G_TRAVERSE_ALL, -1, imap_reset_uid_lists_func, NULL);
 558 }
 559
 560 static int imap_get_capabilities(IMAPSession *session)
 561 {
 562         struct mailimap_capability_data *capabilities = NULL;
 563         clistiter *cur;
 564         int result = -1;
 565
 566         if (session->capability != NULL)
 567                 return MAILIMAP_NO_ERROR;
 568
 569         capabilities = imap_threaded_capability(session->folder, &result);
 570
 571         if (result != MAILIMAP_NO_ERROR) {
 572                 return MAILIMAP_ERROR_CAPABILITY;
 573         }
 574
 575         if (capabilities == NULL) {
 576                 return MAILIMAP_NO_ERROR;
 577         }
 578
 579         for(cur = clist_begin(capabilities->cap_list) ; cur != NULL ;
 580             cur = clist_next(cur)) {
 581                 struct mailimap_capability * cap =
 582                         clist_content(cur);
 583                 if (!cap || cap->cap_data.cap_name == NULL)
 584                         continue;
 585                 session->capability = g_slist_append
 586                                 (session->capability,
 587                                  g_strdup(cap->cap_data.cap_name));
 588                 debug_print("got capa %s\n", cap->cap_data.cap_name);
 589         }
 590         mailimap_capability_data_free(capabilities);
 591         return MAILIMAP_NO_ERROR;
 592 }
 593
 594 static gboolean imap_has_capability(IMAPSession *session, const gchar *cap)
 595 {
 596         GSList *cur;
 597         for (cur = session->capability; cur; cur = cur->next) {
 598                 if (!g_ascii_strcasecmp(cur->data, cap))
 599                         return TRUE;
 600         }
 601         return FALSE;
 602 }
 603
 604 static gint imap_auth(IMAPSession *session, const gchar *user, const gchar *pass,
 605                       IMAPAuthType type)
 606 {
 607         gint ok = IMAP_ERROR;
 608         static time_t last_login_err = 0;
 609         gchar *ext_info = "";
 610
 611         if (imap_get_capabilities(session) != MAILIMAP_NO_ERROR)
 612                 return IMAP_ERROR;
 613
 614         switch(type) {
 615         case IMAP_AUTH_ANON:
 616                 ok = imap_cmd_login(session, user, pass, "ANONYMOUS");
 617                 break;
 618         case IMAP_AUTH_CRAM_MD5:
 619                 ok = imap_cmd_login(session, user, pass, "CRAM-MD5");
 620                 break;
 621         case IMAP_AUTH_LOGIN:
 622                 ok = imap_cmd_login(session, user, pass, "LOGIN");
 623                 break;
 624         case IMAP_AUTH_GSSAPI:
 625                 ok = imap_cmd_login(session, user, pass, "GSSAPI");
 626                 break;
 627         default:
 628                 debug_print("capabilities:\n"
 629                                 "\t ANONYMOUS %d\n"
 630                                 "\t CRAM-MD5 %d\n"
 631                                 "\t LOGIN %d\n"
 632                                 "\t GSSAPI %d\n",
 633                         imap_has_capability(session, "ANONYMOUS"),
 634                         imap_has_capability(session, "CRAM-MD5"),
 635                         imap_has_capability(session, "LOGIN"),
 636                         imap_has_capability(session, "GSSAPI"));
 637                 if (imap_has_capability(session, "CRAM-MD5"))
 638                         ok = imap_cmd_login(session, user, pass, "CRAM-MD5");
 639                 if (ok == IMAP_ERROR && imap_has_capability(session, "GSSAPI"))
 640                         ok = imap_cmd_login(session, user, pass, "GSSAPI");
 641                 if (ok == IMAP_ERROR) /* we always try LOGIN before giving up */
 642                         ok = imap_cmd_login(session, user, pass, "LOGIN");
 643         }
 644
 645         if (ok == IMAP_SUCCESS)
 646                 session->authenticated = TRUE;
 647         else {
 648                 if (type == IMAP_AUTH_CRAM_MD5) {
 649                         ext_info = _("\n\nCRAM-MD5 logins only work if libetpan has been "
 650                                      "compiled with SASL support and the "
 651                                      "CRAM-MD5 SASL plugin is installed.");
 652                 }
 653
 654                 if (time(NULL) - last_login_err > 10) {
 655                         if (!prefs_common.no_recv_err_panel) {
 656                                 alertpanel_error(_("Connection to %s failed: "
 657                                         "login refused.%s"),
 658                                         SESSION(session)->server, ext_info);
 659                         } else {
 660                                 log_error(LOG_PROTOCOL, _("Connection to %s failed: "
 661                                         "login refused.%s\n"),
 662                                         SESSION(session)->server, ext_info);
 663                         }
 664                 }
 665                 last_login_err = time(NULL);
 666         }
 667         return ok;
 668 }
 669
 670 static IMAPSession *imap_reconnect_if_possible(Folder *folder, IMAPSession *session)
 671 {
 672         RemoteFolder *rfolder = REMOTE_FOLDER(folder);
 673         /* Check if this is the first try to establish a
 674            connection, if yes we don't try to reconnect */
 675         debug_print("reconnecting\n");
 676         if (rfolder->session == NULL) {
 677                 log_warning(LOG_PROTOCOL, _("Connecting to %s failed"),
 678                             folder->account->recv_server);
 679                 session_destroy(SESSION(session));
 680                 session = NULL;
 681         } else {
 682                 rfolder->session = NULL;
 683                 log_warning(LOG_PROTOCOL, _("IMAP4 connection to %s has been"
 684                             " disconnected. Reconnecting...\n"),
 685                             folder->account->recv_server);
 686                 statusbar_print_all(_("IMAP4 connection to %s has been"
 687                             " disconnected. Reconnecting...\n"),
 688                             folder->account->recv_server);
 689                 SESSION(session)->state = SESSION_DISCONNECTED;
 690                 session_destroy(SESSION(session));
 691                 /* Clear folders session to make imap_session_get create
 692                    a new session, because of rfolder->session == NULL
 693                    it will not try to reconnect again and so avoid an
 694                    endless loop */
 695                 debug_print("getting session...\n");
 696                 session = imap_session_get(folder);
 697                 rfolder->session = SESSION(session);
 698                 statusbar_pop_all();
 699         }
 700         return session;
 701 }
 702
 703 static void imap_refresh_sensitivity (IMAPSession *session)
 704 {
 705         MainWindow *mainwin;
 706
 707         if (session->sens_update_block)
 708                 return;
 709         mainwin = mainwindow_get_mainwindow();
 710         if (mainwin) {
 711                 toolbar_main_set_sensitive(mainwin);
 712                 main_window_set_menu_sensitive(mainwin);
 713         }
 714 }
 715
 716 static void lock_session(IMAPSession *session)
 717 {
 718         if (session) {
 719                 debug_print("locking session %p (%d)\n", session, session->busy);
 720                 if (session->busy)
 721                         debug_print("         SESSION WAS LOCKED !!      \n");
 722                 session->busy = TRUE;
 723                 imap_refresh_sensitivity(session);
 724         } else {
 725                 debug_print("can't lock null session\n");
 726         }
 727 }
 728
 729 static void unlock_session(IMAPSession *session)
 730 {
 731         if (session) {
 732                 debug_print("unlocking session %p\n", session);
 733                 session->busy = FALSE;
 734                 imap_refresh_sensitivity(session);
 735         } else {
 736                 debug_print("can't unlock null session\n");
 737         }
 738 }
 739
 740 static void imap_disc_session_destroy(Folder *folder)
 741 {
 742         RemoteFolder *rfolder = REMOTE_FOLDER(folder);
 743         IMAPSession *session = NULL;
 744
 745         if (!rfolder)
 746                 return;
 747         session = IMAP_SESSION(rfolder->session);
 748         if (!session)
 749                 return;
 750         rfolder->session = NULL;
 751         log_warning(LOG_PROTOCOL, _("IMAP4 connection broken\n"));
 752         SESSION(session)->state = SESSION_DISCONNECTED;
 753         session_destroy(SESSION(session));
 754 }
 755
 756 static IMAPSession *imap_session_get(Folder *folder)
 757 {
 758         RemoteFolder *rfolder = REMOTE_FOLDER(folder);
 759         IMAPSession *session = NULL;
 760
 761         g_return_val_if_fail(folder != NULL, NULL);
 762         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, NULL);
 763         g_return_val_if_fail(folder->account != NULL, NULL);
 764
 765         if (prefs_common.work_offline &&
 766             !inc_offline_should_override(FALSE,
 767                 _("Claws Mail needs network access in order "
 768                   "to access the IMAP server."))) {
 769                 return NULL;
 770         }
 771
 772         /* Make sure we have a session */
 773         if (rfolder->session != NULL) {
 774                 session = IMAP_SESSION(rfolder->session);
 775         } else if (rfolder->connecting) {
 776                 debug_print("already connecting\n");
 777                 return NULL;
 778         } else {
 779                 imap_reset_uid_lists(folder);
 780                 if (time(NULL) - rfolder->last_failure <= 2)
 781                         return NULL;
 782                 rfolder->connecting = TRUE;
 783                 session = imap_session_new(folder, folder->account);
 784         }
 785         if(session == NULL) {
 786                 rfolder->last_failure = time(NULL);
 787                 rfolder->connecting = FALSE;
 788                 return NULL;
 789         }
 790
 791         /* Make sure session is authenticated */
 792         if (!IMAP_SESSION(session)->authenticated)
 793                 imap_session_authenticate(IMAP_SESSION(session), folder->account);
 794
 795         if (!IMAP_SESSION(session)->authenticated) {
 796                 imap_threaded_disconnect(session->folder);
 797                 rfolder->session = NULL;
 798                 SESSION(session)->state = SESSION_DISCONNECTED;
 799                 session_destroy(SESSION(session));
 800                 rfolder->last_failure = time(NULL);
 801                 rfolder->connecting = FALSE;
 802                 return NULL;
 803         }
 804
 805         lock_session(session);
 806
 807         /* I think the point of this code is to avoid sending a
 808          * keepalive if we've used the session recently and therefore
 809          * think it's still alive.  Unfortunately, most of the code
 810          * does not yet check for errors on the socket, and so if the
 811          * connection drops we don't notice until the timeout expires.
 812          * A better solution than sending a NOOP every time would be
 813          * for every command to be prepared to retry until it is
 814          * successfully sent. -- mbp */
 815         if ((time(NULL) - SESSION(session)->last_access_time > SESSION_TIMEOUT_INTERVAL) || session->cancelled) {
 816                 /* verify that the session is still alive */
 817                 if (imap_cmd_noop(session) != IMAP_SUCCESS) {
 818                         debug_print("disconnected!\n");
 819                         session = imap_reconnect_if_possible(folder, session);
 820                 }
 821                 if (session)
 822                         session->cancelled = FALSE;
 823         }
 824
 825         rfolder->session = SESSION(session);
 826         rfolder->connecting = FALSE;
 827
 828         return IMAP_SESSION(session);
 829 }
 830
 831 static IMAPSession *imap_session_new(Folder * folder,
 832                                      const PrefsAccount *account)
 833 {
 834         IMAPSession *session;
 835         gushort port;
 836         int r;
 837         int authenticated = FALSE;
 838
 839 #if (defined(USE_OPENSSL) || defined (USE_GNUTLS))
 840         /* FIXME: IMAP over SSL only... */
 841         SSLType ssl_type;
 842
 843         port = account->set_imapport ? account->imapport
 844                 : account->ssl_imap == SSL_TUNNEL ? IMAPS_PORT : IMAP4_PORT;
 845         ssl_type = account->ssl_imap;
 846 #else
 847         if (account->ssl_imap != SSL_NONE) {
 848                 if (alertpanel_full(_("Insecure connection"),
 849                         _("This connection is configured to be secured "
 850                           "using SSL, but SSL is not available in this "
 851                           "build of Claws Mail. \n\n"
 852                           "Do you want to continue connecting to this "
 853                           "server? The communication would not be "
 854                           "secure."),
 855                           GTK_STOCK_CANCEL, _("Con_tinue connecting"),
 856                           NULL, FALSE, NULL, ALERT_WARNING,
 857                           G_ALERTDEFAULT) != G_ALERTALTERNATE)
 858                         return NULL;
 859         }
 860         port = account->set_imapport ? account->imapport
 861                 : IMAP4_PORT;
 862 #endif
 863
 864         imap_init(folder);
 865         statuswindow_print_all(_("Connecting to IMAP4 server: %s..."), folder->account->recv_server);
 866         if (account->set_tunnelcmd) {
 867                 r = imap_threaded_connect_cmd(folder,
 868                                               account->tunnelcmd,
 869                                               account->recv_server,
 870                                               port);
 871         }
 872         else {
 873 #if (defined(USE_OPENSSL) || defined (USE_GNUTLS))
 874                 if (ssl_type == SSL_TUNNEL) {
 875                         r = imap_threaded_connect_ssl(folder,
 876                                                       account->recv_server,
 877                                                       port);
 878                 }
 879                 else
 880 #endif
 881                 {
 882                         r = imap_threaded_connect(folder,
 883                                                   account->recv_server,
 884                                                   port);
 885                 }
 886         }
 887
 888         statuswindow_pop_all();
 889         if (r == MAILIMAP_NO_ERROR_AUTHENTICATED) {
 890                 authenticated = TRUE;
 891         }
 892         else if (r == MAILIMAP_NO_ERROR_NON_AUTHENTICATED) {
 893                 authenticated = FALSE;
 894         }
 895         else {
 896 #if (LIBETPAN_VERSION_MAJOR > 0 || LIBETPAN_VERSION_MINOR > 48)
 897 #if (defined(USE_OPENSSL) || defined (USE_GNUTLS))
 898                 if (r == MAILIMAP_ERROR_SSL)
 899                         log_error(LOG_PROTOCOL, _("SSL handshake failed\n"));
 900 #endif
 901 #endif
 902                 if(!prefs_common.no_recv_err_panel) {
 903                         alertpanel_error_log(_("Can't connect to IMAP4 server: %s:%d"),
 904                                          account->recv_server, port);
 905                 } else {
 906                         log_error(LOG_PROTOCOL, _("Can't connect to IMAP4 server: %s:%d\n"),
 907                                          account->recv_server, port);
 908                 }
 909
 910                 return NULL;
 911         }
 912
 913         session = g_new0(IMAPSession, 1);
 914         session_init(SESSION(session));
 915         SESSION(session)->type             = SESSION_IMAP;
 916         SESSION(session)->server           = g_strdup(account->recv_server);
 917         SESSION(session)->sock             = NULL;
 918
 919         SESSION(session)->destroy          = imap_session_destroy;
 920
 921         session->capability = NULL;
 922
 923         session->authenticated = authenticated;
 924         session->mbox = NULL;
 925         session->exists = 0;
 926         session->recent = 0;
 927         session->expunge = 0;
 928         session->cmd_count = 0;
 929         session->folder = folder;
 930         IMAP_FOLDER(session->folder)->last_seen_separator = 0;
 931
 932 #if (defined(USE_OPENSSL) || defined (USE_GNUTLS))
 933         if (account->ssl_imap == SSL_STARTTLS) {
 934                 gint ok;
 935
 936                 ok = imap_cmd_starttls(session);
 937                 if (ok != IMAP_SUCCESS) {
 938                         log_warning(LOG_PROTOCOL, _("Can't start TLS session.\n"));
 939                         session_destroy(SESSION(session));
 940                         return NULL;
 941                 }
 942
 943                 imap_free_capabilities(session);
 944                 session->authenticated = FALSE;
 945                 session->uidplus = FALSE;
 946                 session->cmd_count = 1;
 947         }
 948 #endif
 949         log_message(LOG_PROTOCOL, "IMAP connection is %s-authenticated\n",
 950                     (session->authenticated) ? "pre" : "un");
 951
 952         return session;
 953 }
 954
 955 static void imap_session_authenticate(IMAPSession *session,
 956                                       const PrefsAccount *account)
 957 {
 958         gchar *pass, *acc_pass;
 959         gboolean failed = FALSE;
 960
 961         g_return_if_fail(account->userid != NULL);
 962         acc_pass = account->passwd;
 963 try_again:
 964         pass = acc_pass;
 965         if (!pass && account->imap_auth_type != IMAP_AUTH_ANON) {
 966                 gchar *tmp_pass;
 967                 tmp_pass = input_dialog_query_password(account->recv_server, account->userid);
 968                 if (!tmp_pass)
 969                         return;
 970                 Xstrdup_a(pass, tmp_pass, {g_free(tmp_pass); return;});
 971                 g_free(tmp_pass);
 972         } else if (account->imap_auth_type == IMAP_AUTH_ANON) {
 973                 pass = "";
 974         }
 975         statuswindow_print_all(_("Connecting to IMAP4 server %s...\n"),
 976                                 account->recv_server);
 977         if (imap_auth(session, account->userid, pass, account->imap_auth_type) != IMAP_SUCCESS) {
 978                 statusbar_pop_all();
 979
 980                 if (!failed) {
 981                         acc_pass = NULL;
 982                         failed = TRUE;
 983                         goto try_again;
 984                 } else {
 985                         if (prefs_common.no_recv_err_panel) {
 986                                 log_error(LOG_PROTOCOL, _("Couldn't login to IMAP server %s."), account->recv_server);
 987                                 mainwindow_show_error();
 988                         } else
 989                                 alertpanel_error_log(_("Couldn't login to IMAP server %s."), account->recv_server);
 990                 }
 991
 992                 return;
 993         }
 994
 995         statuswindow_pop_all();
 996         session->authenticated = TRUE;
 997         return;
 998 }
 999
1000 static void imap_session_destroy(Session *session)
1001 {
1002         if (session->state != SESSION_DISCONNECTED)
1003                 imap_threaded_disconnect(IMAP_SESSION(session)->folder);
1004
1005         imap_free_capabilities(IMAP_SESSION(session));
1006         g_free(IMAP_SESSION(session)->mbox);
1007         sock_close(session->sock);
1008         session->sock = NULL;
1009 }
1010
1011 static gchar *imap_fetch_msg(Folder *folder, FolderItem *item, gint uid)
1012 {
1013         return imap_fetch_msg_full(folder, item, uid, TRUE, TRUE);
1014 }
1015
1016 static guint get_file_size_with_crs(const gchar *filename)
1017 {
1018         FILE *fp = NULL;
1019         guint cnt = 0;
1020         gchar buf[4096];
1021
1022         if (filename == NULL)
1023                 return -1;
1024
1025         fp = fopen(filename, "rb");
1026         if (!fp)
1027                 return -1;
1028
1029         while (fgets(buf, sizeof (buf), fp) != NULL) {
1030                 cnt += strlen(buf);
1031                 if (!strstr(buf, "\r\n") && strstr(buf, "\n"))
1032                         cnt++;
1033         }
1034
1035         fclose(fp);
1036         return cnt;
1037 }
1038
1039 static void imap_remove_cached_msg(Folder *folder, FolderItem *item, MsgInfo *msginfo)
1040 {
1041         gchar *path, *filename;
1042
1043         path = folder_item_get_path(item);
1044
1045         if (!is_dir_exist(path)) {
1046                 g_free(path);
1047                 return;
1048         }
1049
1050         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(msginfo->msgnum), NULL);
1051         g_free(path);
1052
1053         if (is_file_exist(filename)) {
1054                 g_unlink(filename);
1055         }
1056         g_free(filename);
1057 }
1058
1059 static gchar *imap_fetch_msg_full(Folder *folder, FolderItem *item, gint uid,
1060                                   gboolean headers, gboolean body)
1061 {
1062         gchar *path, *filename;
1063         IMAPSession *session;
1064         gint ok;
1065
1066         g_return_val_if_fail(folder != NULL, NULL);
1067         g_return_val_if_fail(item != NULL, NULL);
1068
1069         if (uid == 0)
1070                 return NULL;
1071
1072         path = folder_item_get_path(item);
1073         if (!is_dir_exist(path))
1074                 make_dir_hier(path);
1075         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(uid), NULL);
1076         g_free(path);
1077         debug_print("trying to fetch cached %s\n", filename);
1078         if (is_file_exist(filename)) {
1079                 /* see whether the local file represents the whole message
1080                  * or not. As the IMAP server reports size with \r chars,
1081                  * we have to update the local file (UNIX \n only) size */
1082                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1083                 guint have_size = -1;
1084
1085                 if (cached)
1086                         debug_print("message %d has been already %scached.\n", uid,
1087                                 MSG_IS_FULLY_CACHED(cached->flags) ? "fully ":"");
1088
1089                 if (!cached || !MSG_IS_FULLY_CACHED(cached->flags)) {
1090                         have_size = get_file_size_with_crs(filename);
1091                         if (cached && (cached->size <= have_size || !body)) {
1092                                 procmsg_msginfo_free(cached);
1093                                 ok = file_strip_crs(filename);
1094                                 if (ok == 0 && cached && cached->size <= have_size) {
1095                                         /* we have it all and stripped */
1096                                         debug_print("...fully cached in fact; setting flag.\n");
1097                                         procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1098                                 }
1099                                 return filename;
1100                         } else if (!cached && time(NULL) - get_file_mtime(filename) < 60) {
1101                                 debug_print("message not cached and file recent, considering file complete\n");
1102                                 ok = file_strip_crs(filename);
1103                                 if (ok == 0)
1104                                         return filename;
1105                         } else {
1106                                 procmsg_msginfo_free(cached);
1107                         }
1108                 }
1109                 if (cached && MSG_IS_FULLY_CACHED(cached->flags)) {
1110                         procmsg_msginfo_free(cached);
1111                         return filename;
1112                 }
1113         } else {
1114                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1115                 if (cached) {
1116                         procmsg_msginfo_unset_flags(cached, MSG_FULLY_CACHED, 0);
1117                         procmsg_msginfo_free(cached);
1118                 }
1119         }
1120
1121         debug_print("getting session...\n");
1122         session = imap_session_get(folder);
1123
1124         if (!session) {
1125                 g_free(filename);
1126                 return NULL;
1127         }
1128
1129         debug_print("IMAP fetching messages\n");
1130         ok = imap_select(session, IMAP_FOLDER(folder), item->path,
1131                          NULL, NULL, NULL, NULL, FALSE);
1132         if (ok != IMAP_SUCCESS) {
1133                 g_warning("can't select mailbox %s\n", item->path);
1134                 g_free(filename);
1135                 unlock_session(session);
1136                 if (ok == MAILIMAP_ERROR_STREAM) {
1137                         imap_disc_session_destroy(folder);
1138                         session = NULL;
1139                 }
1140                 return NULL;
1141         }
1142
1143         debug_print("getting message %d...\n", uid);
1144         ok = imap_cmd_fetch(session, (guint32)uid, filename, headers, body);
1145
1146         if (ok != IMAP_SUCCESS) {
1147                 g_warning("can't fetch message %d\n", uid);
1148                 g_free(filename);
1149                 unlock_session(session);
1150                 if (ok == MAILIMAP_ERROR_STREAM) {
1151                         imap_disc_session_destroy(folder);
1152                         session = NULL;
1153                 }
1154                 return NULL;
1155         }
1156
1157         unlock_session(session);
1158         ok = file_strip_crs(filename);
1159
1160         if (ok == 0 && headers && body) {
1161                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1162                 if (cached) {
1163                         procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1164                         procmsg_msginfo_free(cached);
1165                 }
1166         } else if (ok == -1) {
1167                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1168                 if (cached) {
1169                         procmsg_msginfo_unset_flags(cached, MSG_FULLY_CACHED, 0);
1170                         procmsg_msginfo_free(cached);
1171                 }
1172         }
1173         return filename;
1174 }
1175
1176 static gboolean imap_is_msg_fully_cached(Folder *folder, FolderItem *item, gint uid)
1177 {
1178         gchar *path, *filename;
1179         guint size = 0;
1180         MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1181
1182         if (!cached)
1183                 return FALSE;
1184
1185         if (MSG_IS_FULLY_CACHED(cached->flags)) {
1186                 procmsg_msginfo_free(cached);
1187                 return TRUE;
1188         }
1189         path = folder_item_get_path(item);
1190         if (!is_dir_exist(path))
1191                 return FALSE;
1192
1193         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(uid), NULL);
1194         g_free(path);
1195         if (is_file_exist(filename)) {
1196                 if (cached && cached->total_size == cached->size) {
1197                         /* fast path */
1198                         g_free(filename);
1199                         procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1200                         return TRUE;
1201                 }
1202                 size = get_file_size_with_crs(filename);
1203                 g_free(filename);
1204         }
1205         if (cached && size >= cached->size) {
1206                 cached->total_size = cached->size;
1207                 procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1208                 procmsg_msginfo_free(cached);
1209                 return TRUE;
1210         }
1211         if (cached)
1212                 procmsg_msginfo_free(cached);
1213         return FALSE;
1214 }
1215
1216 void imap_cache_msg(FolderItem *item, gint msgnum)
1217 {
1218         Folder *folder = NULL;
1219
1220         if (!item)
1221                 return;
1222         folder = item->folder;
1223
1224         if (!imap_is_msg_fully_cached(folder, item, msgnum)) {
1225                 gchar *tmp = imap_fetch_msg_full(folder, item, msgnum, TRUE, TRUE);
1226                 debug_print("fetched %s\n", tmp);
1227                 g_free(tmp);
1228         }
1229 }
1230
1231 static gint imap_add_msg(Folder *folder, FolderItem *dest,
1232                          const gchar *file, MsgFlags *flags)
1233 {
1234         gint ret;
1235         GSList file_list;
1236         MsgFileInfo fileinfo;
1237
1238         g_return_val_if_fail(file != NULL, -1);
1239
1240         fileinfo.msginfo = NULL;
1241         fileinfo.file = (gchar *)file;
1242         fileinfo.flags = flags;
1243         file_list.data = &fileinfo;
1244         file_list.next = NULL;
1245
1246         ret = imap_add_msgs(folder, dest, &file_list, NULL);
1247         return ret;
1248 }
1249
1250 static gint imap_add_msgs(Folder *folder, FolderItem *dest, GSList *file_list,
1251                    GRelation *relation)
1252 {
1253         gchar *destdir;
1254         IMAPSession *session;
1255         guint32 last_uid = 0;
1256         GSList *cur;
1257         MsgFileInfo *fileinfo;
1258         gint ok;
1259         gint curnum = 0, total = 0;
1260         gboolean missing_uids = FALSE;
1261
1262         g_return_val_if_fail(folder != NULL, -1);
1263         g_return_val_if_fail(dest != NULL, -1);
1264         g_return_val_if_fail(file_list != NULL, -1);
1265
1266         debug_print("getting session...\n");
1267         session = imap_session_get(folder);
1268         if (!session) {
1269                 return -1;
1270         }
1271         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path);
1272
1273         statusbar_print_all(_("Adding messages..."));
1274         total = g_slist_length(file_list);
1275         for (cur = file_list; cur != NULL; cur = cur->next) {
1276                 IMAPFlags iflags = 0;
1277                 guint32 new_uid = 0;
1278                 gchar *real_file = NULL;
1279                 fileinfo = (MsgFileInfo *)cur->data;
1280
1281                 statusbar_progress_all(curnum, total, total < 10 ? 1:10);
1282                 curnum++;
1283
1284                 if (fileinfo->flags) {
1285                         if (MSG_IS_MARKED(*fileinfo->flags))
1286                                 iflags |= IMAP_FLAG_FLAGGED;
1287                         if (MSG_IS_REPLIED(*fileinfo->flags))
1288                                 iflags |= IMAP_FLAG_ANSWERED;
1289                         if (!MSG_IS_UNREAD(*fileinfo->flags))
1290                                 iflags |= IMAP_FLAG_SEEN;
1291                 }
1292
1293                 if (real_file == NULL)
1294                         real_file = g_strdup(fileinfo->file);
1295
1296                 if (folder_has_parent_of_type(dest, F_QUEUE) ||
1297                     folder_has_parent_of_type(dest, F_OUTBOX) ||
1298                     folder_has_parent_of_type(dest, F_DRAFT) ||
1299                     folder_has_parent_of_type(dest, F_TRASH))
1300                         iflags |= IMAP_FLAG_SEEN;
1301
1302                 ok = imap_cmd_append(session, destdir, real_file, iflags,
1303                                      &new_uid);
1304
1305                 if (ok != IMAP_SUCCESS) {
1306                         g_warning("can't append message %s\n", real_file);
1307                         g_free(real_file);
1308                         g_free(destdir);
1309                         unlock_session(session);
1310                         statusbar_progress_all(0,0,0);
1311                         statusbar_pop_all();
1312                         if (ok == MAILIMAP_ERROR_STREAM) {
1313                                 imap_disc_session_destroy(folder);
1314                                 session = NULL;
1315                         }
1316                         return -1;
1317                 } else {
1318                         debug_print("appended new message as %d\n", new_uid);
1319                         /* put the local file in the imapcache, so that we don't
1320                          * have to fetch it back later. */
1321
1322                         if (new_uid == 0) {
1323                                 missing_uids = TRUE;
1324                                 debug_print("Missing UID (0)\n");
1325                         }
1326                         if (new_uid > 0) {
1327                                 gchar *cache_path = folder_item_get_path(dest);
1328                                 if (!is_dir_exist(cache_path))
1329                                         make_dir_hier(cache_path);
1330                                 if (is_dir_exist(cache_path)) {
1331                                         gchar *cache_file = g_strconcat(
1332                                                 cache_path, G_DIR_SEPARATOR_S,
1333                                                 itos(new_uid), NULL);
1334                                         copy_file(real_file, cache_file, TRUE);
1335                                         debug_print("got UID %d, copied to cache: %s\n", new_uid, cache_file);
1336                                         g_free(cache_file);
1337                                 }
1338                                 g_free(cache_path);
1339                         }
1340                 }
1341
1342                 if (relation != NULL)
1343                         g_relation_insert(relation, fileinfo->msginfo != NULL ?
1344                                           (gpointer) fileinfo->msginfo : (gpointer) fileinfo,
1345                                           GINT_TO_POINTER(new_uid));
1346                 if (last_uid < new_uid) {
1347                         last_uid = new_uid;
1348                 }
1349
1350                 g_free(real_file);
1351         }
1352
1353         statusbar_progress_all(0,0,0);
1354         statusbar_pop_all();
1355
1356         unlock_session(session);
1357
1358         g_free(destdir);
1359
1360         imap_scan_required(folder, dest);
1361
1362         session = imap_session_get(folder);
1363         if (!session) {
1364                 return -1;
1365         } else {
1366                 unlock_session(session);
1367         }
1368         if (missing_uids) {
1369                 gint a;
1370                 ok = imap_select(session, IMAP_FOLDER(folder), dest->path,
1371                          &a, NULL, NULL, NULL, FALSE);
1372                 if (ok == MAILIMAP_ERROR_STREAM) {
1373                         imap_disc_session_destroy(folder);
1374                         session = NULL;
1375                 }
1376         }
1377         return last_uid;
1378 }
1379
1380 static GSList *flatten_mailimap_set(struct mailimap_set * set)
1381 {
1382         GSList *result = NULL;
1383         clistiter *list;
1384         int start, end, t;
1385         GSList *cur;
1386
1387         for (list = clist_begin(set->set_list); list; list = clist_next(list)) {
1388                 struct mailimap_set_item *item = (struct mailimap_set_item *)clist_content(list);
1389                 start = item->set_first;
1390                 end = item->set_last;
1391                 for (t = start; t <= end; t++) {
1392                         result = g_slist_prepend(result, GINT_TO_POINTER(t));
1393                 }
1394         }
1395         result = g_slist_reverse(result);
1396         if (debug_get_mode()) {
1397                 debug_print("flat imap set: ");
1398                 for (cur = result; cur; cur = cur->next) {
1399                         debug_print("%d ", GPOINTER_TO_INT(cur->data));
1400                 }
1401                 debug_print("\n");
1402         }
1403
1404         return result;
1405 }
1406 static gint imap_do_copy_msgs(Folder *folder, FolderItem *dest,
1407                               MsgInfoList *msglist, GRelation *relation)
1408 {
1409         FolderItem *src;
1410         gchar *destdir;
1411         GSList *seq_list, *cur;
1412         MsgInfo *msginfo;
1413         IMAPSession *session;
1414         gint ok = IMAP_SUCCESS;
1415         GRelation *uid_mapping;
1416         gint last_num = 0;
1417         gboolean single = FALSE;
1418
1419         g_return_val_if_fail(folder != NULL, -1);
1420         g_return_val_if_fail(dest != NULL, -1);
1421         g_return_val_if_fail(msglist != NULL, -1);
1422
1423         debug_print("getting session...\n");
1424         session = imap_session_get(folder);
1425
1426         if (!session) {
1427                 return -1;
1428         }
1429
1430         msginfo = (MsgInfo *)msglist->data;
1431         if (msglist->next == NULL)
1432                 single = TRUE;
1433         src = msginfo->folder;
1434         if (src == dest) {
1435                 g_warning("the src folder is identical to the dest.\n");
1436                 unlock_session(session);
1437                 return -1;
1438         }
1439
1440         if (src->folder != dest->folder) {
1441                 GSList *infolist = NULL, *cur;
1442                 int res = -1;
1443                 for (cur = msglist; cur; cur = cur->next) {
1444                         msginfo = (MsgInfo *)cur->data;
1445                         MsgFileInfo *fileinfo = g_new0(MsgFileInfo, 1);
1446                         fileinfo->file = procmsg_get_message_file(msginfo);
1447                         fileinfo->flags = &(msginfo->flags);
1448                         infolist = g_slist_prepend(infolist, fileinfo);
1449                 }
1450                 infolist = g_slist_reverse(infolist);
1451                 unlock_session(session);
1452                 res = folder_item_add_msgs(dest, infolist, FALSE);
1453                 for (cur = infolist; cur; cur = cur->next) {
1454                         MsgFileInfo *info = (MsgFileInfo *)cur->data;
1455                         g_free(info->file);
1456                         g_free(info);
1457                 }
1458                 g_slist_free(infolist);
1459                 return res;
1460         }
1461
1462         ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder->path,
1463                          NULL, NULL, NULL, NULL, FALSE);
1464         if (ok != IMAP_SUCCESS) {
1465                 unlock_session(session);
1466                 if (ok == MAILIMAP_ERROR_STREAM) {
1467                         imap_disc_session_destroy(folder);
1468                         session = NULL;
1469                 }
1470                 return ok;
1471         }
1472
1473         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path);
1474         seq_list = imap_get_lep_set_from_msglist(msglist);
1475         uid_mapping = g_relation_new(2);
1476         g_relation_index(uid_mapping, 0, g_direct_hash, g_direct_equal);
1477
1478         statusbar_print_all(_("Copying messages..."));
1479         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
1480                 struct mailimap_set * seq_set;
1481                 struct mailimap_set * source = NULL;
1482                 struct mailimap_set * dest = NULL;
1483                 seq_set = cur->data;
1484
1485                 debug_print("Copying messages from %s to %s ...\n",
1486                             src->path, destdir);
1487
1488                 ok = imap_cmd_copy(session, seq_set, destdir, uid_mapping,
1489                         &source, &dest);
1490
1491                 if (ok == MAILIMAP_ERROR_STREAM) {
1492                         imap_disc_session_destroy(folder);
1493                         session = NULL;
1494                 }
1495                 if (ok == IMAP_SUCCESS) {
1496                         if (relation && source && dest) {
1497                                 GSList *s_list = flatten_mailimap_set(source);
1498                                 GSList *d_list = flatten_mailimap_set(dest);
1499                                 GSList *s_cur, *d_cur;
1500                                 if (g_slist_length(s_list) == g_slist_length(d_list)) {
1501
1502                                         for (s_cur = s_list, d_cur = d_list;
1503                                              s_cur && d_cur;
1504                                              s_cur = s_cur->next, d_cur = d_cur->next) {
1505                                                 g_relation_insert(uid_mapping, s_cur->data, d_cur->data);
1506                                         }
1507
1508                                 } else {
1509                                         debug_print("hhhmm, source list length != dest list length.\n");
1510                                 }
1511                                 g_slist_free(s_list);
1512                                 g_slist_free(d_list);
1513                         }
1514                 }
1515
1516
1517                 if (source)
1518                         mailimap_set_free(source);
1519                 if (dest)
1520                         mailimap_set_free(dest);
1521
1522                 if (ok != IMAP_SUCCESS) {
1523                         g_relation_destroy(uid_mapping);
1524                         imap_lep_set_free(seq_list);
1525                         unlock_session(session);
1526                         statusbar_pop_all();
1527                         return -1;
1528                 }
1529         }
1530
1531         for (cur = msglist; cur != NULL; cur = g_slist_next(cur)) {
1532                 MsgInfo *msginfo = (MsgInfo *)cur->data;
1533                 GTuples *tuples;
1534
1535                 tuples = g_relation_select(uid_mapping,
1536                                            GINT_TO_POINTER(msginfo->msgnum),
1537                                            0);
1538                 if (tuples->len > 0) {
1539                         gint num = GPOINTER_TO_INT(g_tuples_index(tuples, 0, 1));
1540                         g_relation_insert(relation, msginfo,
1541                                           GINT_TO_POINTER(num));
1542                         if (num > last_num)
1543                                 last_num = num;
1544                         debug_print("copied message %d as %d\n", msginfo->msgnum, num);
1545                         /* put the local file in the imapcache, so that we don't
1546                          * have to fetch it back later. */
1547                         if (num > 0) {
1548                                 gchar *cache_path = folder_item_get_path(msginfo->folder);
1549                                 gchar *real_file = g_strconcat(
1550                                         cache_path, G_DIR_SEPARATOR_S,
1551                                         itos(msginfo->msgnum), NULL);
1552                                 gchar *cache_file = NULL;
1553                                 g_free(cache_path);
1554                                 cache_path = folder_item_get_path(dest);
1555                                 cache_file = g_strconcat(
1556                                         cache_path, G_DIR_SEPARATOR_S,
1557                                         itos(num), NULL);
1558                                 if (!is_dir_exist(cache_path))
1559                                         make_dir_hier(cache_path);
1560                                 if (is_file_exist(real_file) && is_dir_exist(cache_path)) {
1561                                         copy_file(real_file, cache_file, TRUE);
1562                                         debug_print("copied to cache: %s\n", cache_file);
1563                                 }
1564                                 g_free(real_file);
1565                                 g_free(cache_file);
1566                                 g_free(cache_path);
1567                         }
1568                 } else
1569                         g_relation_insert(relation, msginfo,
1570                                           GINT_TO_POINTER(0));
1571                 g_tuples_destroy(tuples);
1572         }
1573         statusbar_pop_all();
1574
1575         g_relation_destroy(uid_mapping);
1576         imap_lep_set_free(seq_list);
1577
1578         g_free(destdir);
1579
1580         IMAP_FOLDER_ITEM(dest)->lastuid = 0;
1581         IMAP_FOLDER_ITEM(dest)->uid_next = 0;
1582         g_slist_free(IMAP_FOLDER_ITEM(dest)->uid_list);
1583         IMAP_FOLDER_ITEM(dest)->uid_list = NULL;
1584
1585         unlock_session(session);
1586         imap_scan_required(folder, dest);
1587         if (ok == IMAP_SUCCESS)
1588                 return last_num;
1589         else
1590                 return -1;
1591 }
1592
1593 static gint imap_copy_msg(Folder *folder, FolderItem *dest, MsgInfo *msginfo)
1594 {
1595         GSList msglist;
1596
1597         g_return_val_if_fail(msginfo != NULL, -1);
1598
1599         msglist.data = msginfo;
1600         msglist.next = NULL;
1601
1602         return imap_copy_msgs(folder, dest, &msglist, NULL);
1603 }
1604
1605 static gint imap_copy_msgs(Folder *folder, FolderItem *dest,
1606                     MsgInfoList *msglist, GRelation *relation)
1607 {
1608         MsgInfo *msginfo;
1609         gint ret;
1610
1611         g_return_val_if_fail(folder != NULL, -1);
1612         g_return_val_if_fail(dest != NULL, -1);
1613         g_return_val_if_fail(msglist != NULL, -1);
1614
1615         msginfo = (MsgInfo *)msglist->data;
1616         g_return_val_if_fail(msginfo->folder != NULL, -1);
1617
1618         ret = imap_do_copy_msgs(folder, dest, msglist, relation);
1619         return ret;
1620 }
1621
1622
1623 static gint imap_do_remove_msgs(Folder *folder, FolderItem *dest,
1624                                 MsgInfoList *msglist, GRelation *relation)
1625 {
1626         gchar *destdir, *dir;
1627         GSList *numlist = NULL, *cur;
1628         MsgInfo *msginfo;
1629         IMAPSession *session;
1630         gint ok = IMAP_SUCCESS;
1631         GRelation *uid_mapping;
1632
1633         g_return_val_if_fail(folder != NULL, -1);
1634         g_return_val_if_fail(dest != NULL, -1);
1635         g_return_val_if_fail(msglist != NULL, -1);
1636
1637         debug_print("getting session...\n");
1638         session = imap_session_get(folder);
1639         if (!session) {
1640                 return -1;
1641         }
1642
1643         msginfo = (MsgInfo *)msglist->data;
1644
1645         ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder->path,
1646                          NULL, NULL, NULL, NULL, FALSE);
1647         if (ok != IMAP_SUCCESS) {
1648                 unlock_session(session);
1649                 if (ok == MAILIMAP_ERROR_STREAM) {
1650                         imap_disc_session_destroy(folder);
1651                         session = NULL;
1652                 }
1653                 return ok;
1654         }
1655
1656         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path);
1657         for (cur = msglist; cur; cur = cur->next) {
1658                 msginfo = (MsgInfo *)cur->data;
1659                 if (!MSG_IS_DELETED(msginfo->flags))
1660                         numlist = g_slist_prepend(numlist, GINT_TO_POINTER(msginfo->msgnum));
1661         }
1662         numlist = g_slist_reverse(numlist);
1663
1664         uid_mapping = g_relation_new(2);
1665         g_relation_index(uid_mapping, 0, g_direct_hash, g_direct_equal);
1666
1667         ok = imap_set_message_flags
1668                 (session, numlist, IMAP_FLAG_DELETED, TRUE);
1669         if (ok != IMAP_SUCCESS) {
1670                 log_warning(LOG_PROTOCOL, _("can't set deleted flags\n"));
1671                 unlock_session(session);
1672                 if (ok == MAILIMAP_ERROR_STREAM) {
1673                         imap_disc_session_destroy(folder);
1674                         session = NULL;
1675                 }
1676                 return ok;
1677         }
1678         ok = imap_cmd_expunge(session);
1679         if (ok != IMAP_SUCCESS) {
1680                 log_warning(LOG_PROTOCOL, _("can't expunge\n"));
1681                 unlock_session(session);
1682                 if (ok == MAILIMAP_ERROR_STREAM) {
1683                         imap_disc_session_destroy(folder);
1684                         session = NULL;
1685                 }
1686                 return ok;
1687         }
1688
1689         dir = folder_item_get_path(msginfo->folder);
1690         if (is_dir_exist(dir)) {
1691                 for (cur = msglist; cur; cur = cur->next) {
1692                         msginfo = (MsgInfo *)cur->data;
1693                         remove_numbered_files(dir, msginfo->msgnum, msginfo->msgnum);
1694                 }
1695         }
1696         g_free(dir);
1697
1698         g_relation_destroy(uid_mapping);
1699         g_slist_free(numlist);
1700
1701         g_free(destdir);
1702         unlock_session(session);
1703         if (ok == IMAP_SUCCESS)
1704                 return 0;
1705         else
1706                 return -1;
1707 }
1708
1709 static gint imap_remove_msgs(Folder *folder, FolderItem *dest,
1710                     MsgInfoList *msglist, GRelation *relation)
1711 {
1712         MsgInfo *msginfo;
1713
1714         g_return_val_if_fail(folder != NULL, -1);
1715         g_return_val_if_fail(dest != NULL, -1);
1716         if (msglist == NULL)
1717                 return 0;
1718
1719         msginfo = (MsgInfo *)msglist->data;
1720         g_return_val_if_fail(msginfo->folder != NULL, -1);
1721
1722         return imap_do_remove_msgs(folder, dest, msglist, relation);
1723 }
1724
1725 static gint imap_remove_all_msg(Folder *folder, FolderItem *item)
1726 {
1727         GSList *list = folder_item_get_msg_list(item);
1728         gint res = imap_remove_msgs(folder, item, list, NULL);
1729         procmsg_msg_list_free(list);
1730         return res;
1731 }
1732
1733 static gboolean imap_is_msg_changed(Folder *folder, FolderItem *item,
1734                                     MsgInfo *msginfo)
1735 {
1736         /* TODO: properly implement this method */
1737         return FALSE;
1738 }
1739
1740 static gint imap_close(Folder *folder, FolderItem *item)
1741 {
1742         return 0;
1743 }
1744
1745 static gint imap_scan_tree_real(Folder *folder, gboolean subs_only)
1746 {
1747         FolderItem *item = NULL;
1748         IMAPSession *session;
1749         gchar *root_folder = NULL;
1750
1751         g_return_val_if_fail(folder != NULL, -1);
1752         g_return_val_if_fail(folder->account != NULL, -1);
1753
1754         debug_print("getting session...\n");
1755         session = imap_session_get(folder);
1756         if (!session) {
1757                 if (!folder->node) {
1758                         folder_tree_destroy(folder);
1759                         item = folder_item_new(folder, folder->name, NULL);
1760                         item->folder = folder;
1761                         folder->node = item->node = g_node_new(item);
1762                 }
1763                 return -1;
1764         }
1765
1766         if (folder->account->imap_dir && *folder->account->imap_dir) {
1767                 gchar *real_path;
1768                 int r;
1769                 clist * lep_list;
1770
1771                 Xstrdup_a(root_folder, folder->account->imap_dir, {unlock_session(session);return -1;});
1772                 extract_quote(root_folder, '"');
1773                 subst_char(root_folder,
1774                            imap_get_path_separator(session, IMAP_FOLDER(folder),
1775                                                    root_folder),
1776                            '/');
1777                 strtailchomp(root_folder, '/');
1778                 real_path = imap_get_real_path
1779                         (session, IMAP_FOLDER(folder), root_folder);
1780                 debug_print("IMAP root directory: %s\n", real_path);
1781
1782                 /* check if root directory exist */
1783
1784                 r = imap_threaded_list(session->folder, "", real_path,
1785                                        &lep_list);
1786                 if ((r != MAILIMAP_NO_ERROR) || (clist_count(lep_list) == 0)) {
1787                         if (!folder->node) {
1788                                 item = folder_item_new(folder, folder->name, NULL);
1789                                 item->folder = folder;
1790                                 folder->node = item->node = g_node_new(item);
1791                         }
1792                         unlock_session(session);
1793                         return -1;
1794                 }
1795                 mailimap_list_result_free(lep_list);
1796
1797                 g_free(real_path);
1798         }
1799
1800         if (folder->node)
1801                 item = FOLDER_ITEM(folder->node->data);
1802
1803         if (item && !item->path && root_folder) {
1804                 item->path = g_strdup(root_folder);
1805         }
1806
1807         if (!item || ((item->path || root_folder) &&
1808                       strcmp2(item->path, root_folder) != 0)) {
1809                 folder_tree_destroy(folder);
1810                 item = folder_item_new(folder, folder->name, root_folder);
1811                 item->folder = folder;
1812                 folder->node = item->node = g_node_new(item);
1813         }
1814
1815         imap_scan_tree_recursive(session, FOLDER_ITEM(folder->node->data), subs_only);
1816         imap_create_missing_folders(folder);
1817         unlock_session(session);
1818
1819         return 0;
1820 }
1821
1822 static gint imap_scan_tree(Folder *folder)
1823 {
1824         gboolean subs_only = FALSE;
1825         if (folder->account) {
1826                 debug_print(" scanning only subs %d\n", folder->account->imap_subsonly);
1827                 subs_only = folder->account->imap_subsonly;
1828         }
1829         return imap_scan_tree_real(folder, subs_only);
1830 }
1831
1832 static gint imap_scan_tree_recursive(IMAPSession *session, FolderItem *item, gboolean subs_only)
1833 {
1834         Folder *folder;
1835         IMAPFolder *imapfolder;
1836         FolderItem *new_item;
1837         GSList *item_list, *cur;
1838         GNode *node;
1839         gchar *real_path;
1840         gchar *wildcard_path;
1841         gchar separator;
1842         gchar wildcard[3];
1843         clist * lep_list;
1844         int r;
1845
1846         g_return_val_if_fail(item != NULL, -1);
1847         g_return_val_if_fail(item->folder != NULL, -1);
1848         g_return_val_if_fail(item->no_sub == FALSE, -1);
1849
1850         folder = item->folder;
1851         imapfolder = IMAP_FOLDER(folder);
1852
1853         separator = imap_get_path_separator(session, imapfolder, item->path);
1854
1855         if (folder->ui_func)
1856                 folder->ui_func(folder, item, folder->ui_func_data);
1857
1858         if (item->path) {
1859                 wildcard[0] = separator;
1860                 wildcard[1] = '%';
1861                 wildcard[2] = '\0';
1862                 real_path = imap_get_real_path(session, imapfolder, item->path);
1863         } else {
1864                 wildcard[0] = '%';
1865                 wildcard[1] = '\0';
1866                 real_path = g_strdup("");
1867         }
1868
1869         Xstrcat_a(wildcard_path, real_path, wildcard,
1870                   {g_free(real_path); return IMAP_ERROR;});
1871         lep_list = NULL;
1872
1873         if (subs_only)
1874                 r = imap_threaded_lsub(folder, "", wildcard_path, &lep_list);
1875         else
1876                 r = imap_threaded_list(folder, "", wildcard_path, &lep_list);
1877
1878         if (r != MAILIMAP_NO_ERROR) {
1879                 item_list = NULL;
1880         }
1881         else {
1882                 item_list = imap_list_from_lep(imapfolder,
1883                                                lep_list, real_path, FALSE);
1884                 mailimap_list_result_free(lep_list);
1885         }
1886
1887         g_free(real_path);
1888
1889         node = item->node->children;
1890         while (node != NULL) {
1891                 FolderItem *old_item = FOLDER_ITEM(node->data);
1892                 GNode *next = node->next;
1893
1894                 new_item = NULL;
1895                 for (cur = item_list; cur != NULL; cur = cur->next) {
1896                         FolderItem *cur_item = FOLDER_ITEM(cur->data);
1897                         if (!strcmp2(old_item->path, cur_item->path)) {
1898                                 new_item = cur_item;
1899                                 break;
1900                         }
1901                 }
1902                 if (!new_item) {
1903                         if (old_item && old_item->path && !strcmp(old_item->path, "INBOX")) {
1904                                 debug_print("not removing INBOX\n");
1905                         } else {
1906                                 debug_print("folder '%s' not found. removing...\n",
1907                                             old_item->path);
1908                                 folder_item_remove(old_item);
1909                         }
1910                 } else {
1911                         old_item->no_sub = new_item->no_sub;
1912                         old_item->no_select = new_item->no_select;
1913                         if (old_item->no_sub == TRUE && node->children) {
1914                                 debug_print("folder '%s' doesn't have "
1915                                             "subfolders. removing...\n",
1916                                             old_item->path);
1917                                 folder_item_remove_children(old_item);
1918                         }
1919                 }
1920
1921                 node = next;
1922         }
1923
1924         for (cur = item_list; cur != NULL; cur = cur->next) {
1925                 FolderItem *cur_item = FOLDER_ITEM(cur->data);
1926                 new_item = NULL;
1927
1928                 for (node = item->node->children; node != NULL;
1929                      node = node->next) {
1930                         if (!strcmp2(FOLDER_ITEM(node->data)->path,
1931                                      cur_item->path)) {
1932                                 new_item = FOLDER_ITEM(node->data);
1933                                 folder_item_destroy(cur_item);
1934                                 cur_item = NULL;
1935                                 break;
1936                         }
1937                 }
1938                 if (!new_item) {
1939                         new_item = cur_item;
1940                         debug_print("new folder '%s' found.\n", new_item->path);
1941                         folder_item_append(item, new_item);
1942                 }
1943
1944                 if (!strcmp(new_item->path, "INBOX")) {
1945                         new_item->stype = F_INBOX;
1946                         folder->inbox = new_item;
1947                 } else if (!folder_item_parent(item) || item->stype == F_INBOX) {
1948                         gchar *base;
1949
1950                         base = g_path_get_basename(new_item->path);
1951
1952                         if (!folder->outbox && !g_ascii_strcasecmp(base, "Sent")) {
1953                                 new_item->stype = F_OUTBOX;
1954                                 folder->outbox = new_item;
1955                         } else if (!folder->draft && !g_ascii_strcasecmp(base, "Drafts")) {
1956                                 new_item->stype = F_DRAFT;
1957                                 folder->draft = new_item;
1958                         } else if (!folder->queue && !g_ascii_strcasecmp(base, "Queue")) {
1959                                 new_item->stype = F_QUEUE;
1960                                 folder->queue = new_item;
1961                         } else if (!folder->trash && !g_ascii_strcasecmp(base, "Trash")) {
1962                                 new_item->stype = F_TRASH;
1963                                 folder->trash = new_item;
1964                         }
1965                         g_free(base);
1966                 }
1967
1968                 if (new_item->no_sub == FALSE)
1969                         imap_scan_tree_recursive(session, new_item, subs_only);
1970         }
1971
1972         g_slist_free(item_list);
1973
1974         return IMAP_SUCCESS;
1975 }
1976
1977 GList *imap_scan_subtree(Folder *folder, FolderItem *item, gboolean unsubs_only, gboolean recursive)
1978 {
1979         IMAPSession *session = imap_session_get(folder);
1980         gchar *real_path;
1981         gchar *wildcard_path;
1982         gchar separator;
1983         gchar wildcard[3];
1984         clist * lep_list;
1985         GSList *item_list = NULL, *cur;
1986         GList *child_list = NULL, *tmplist = NULL;
1987         GSList *sub_list = NULL;
1988         int r;
1989
1990         if (!session)
1991                 return NULL;
1992
1993         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), item->path);
1994
1995         if (item->path) {
1996                 wildcard[0] = separator;
1997                 wildcard[1] = '%';
1998                 wildcard[2] = '\0';
1999                 real_path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path);
2000         } else {
2001                 wildcard[0] = '%';
2002                 wildcard[1] = '\0';
2003                 real_path = g_strdup("");
2004         }
2005
2006         Xstrcat_a(wildcard_path, real_path, wildcard,
2007                   {g_free(real_path); return NULL;});
2008         lep_list = NULL;
2009
2010         if (unsubs_only)
2011                 statusbar_print_all(_("Looking for unsubscribed folders in %s..."),
2012                                 item->path?item->path:item->name);
2013         else
2014                 statusbar_print_all(_("Looking for subfolders of %s..."),
2015                                 item->path?item->path:item->name);
2016
2017         r = imap_threaded_list(folder, "", wildcard_path, &lep_list);
2018         if (r) {
2019                 statusbar_pop_all();
2020                 return NULL;
2021         }
2022         item_list = imap_list_from_lep(IMAP_FOLDER(folder),
2023                                lep_list, real_path, FALSE);
2024         mailimap_list_result_free(lep_list);
2025
2026         for (cur = item_list; cur != NULL; cur = cur->next) {
2027                 FolderItem *cur_item = FOLDER_ITEM(cur->data);
2028                 if (recursive) {
2029                         tmplist = imap_scan_subtree(folder, cur_item,
2030                                         unsubs_only, recursive);
2031                         if (tmplist)
2032                                 child_list = g_list_concat(child_list, tmplist);
2033                 }
2034                 child_list = g_list_prepend(child_list,
2035                                 imap_get_real_path(session,
2036                                         IMAP_FOLDER(folder), cur_item->path));
2037
2038                 folder_item_destroy(cur_item);
2039         }
2040         child_list = g_list_reverse(child_list);
2041         g_slist_free(item_list);
2042
2043         if (unsubs_only) {
2044                 r = imap_threaded_lsub(folder, "", wildcard_path, &lep_list);
2045                 if (r) {
2046                         statusbar_pop_all();
2047                         return NULL;
2048                 }
2049                 sub_list = imap_list_from_lep(IMAP_FOLDER(folder),
2050                                        lep_list, real_path, FALSE);
2051                 mailimap_list_result_free(lep_list);
2052
2053                 for (cur = sub_list; cur != NULL; cur = cur->next) {
2054                         FolderItem *cur_item = FOLDER_ITEM(cur->data);
2055                         GList *oldlitem = NULL;
2056                         gchar *tmp = imap_get_real_path(session,
2057                                         IMAP_FOLDER(folder), cur_item->path);
2058                         folder_item_destroy(cur_item);
2059                         oldlitem = g_list_find_custom(
2060                                         child_list, tmp, (GCompareFunc)strcmp2);
2061                         if (oldlitem) {
2062                                 child_list = g_list_remove_link(child_list, oldlitem);
2063                                 g_free(oldlitem->data);
2064                                 g_list_free(oldlitem);
2065                         }
2066                         g_free(tmp);
2067                 }
2068         }
2069
2070         statusbar_pop_all();
2071
2072         return child_list;
2073 }
2074
2075 static gint imap_create_tree(Folder *folder)
2076 {
2077         g_return_val_if_fail(folder != NULL, -1);
2078         g_return_val_if_fail(folder->node != NULL, -1);
2079         g_return_val_if_fail(folder->node->data != NULL, -1);
2080         g_return_val_if_fail(folder->account != NULL, -1);
2081
2082         imap_scan_tree(folder);
2083         imap_create_missing_folders(folder);
2084
2085         return 0;
2086 }
2087
2088 static void imap_create_missing_folders(Folder *folder)
2089 {
2090         g_return_if_fail(folder != NULL);
2091
2092         if (!folder->inbox)
2093                 folder->inbox = imap_create_special_folder
2094                         (folder, F_INBOX, "INBOX");
2095         if (!folder->trash)
2096                 folder->trash = imap_create_special_folder
2097                         (folder, F_TRASH, "Trash");
2098         if (!folder->queue)
2099                 folder->queue = imap_create_special_folder
2100                         (folder, F_QUEUE, "Queue");
2101         if (!folder->outbox)
2102                 folder->outbox = imap_create_special_folder
2103                         (folder, F_OUTBOX, "Sent");
2104         if (!folder->draft)
2105                 folder->draft = imap_create_special_folder
2106                         (folder, F_DRAFT, "Drafts");
2107 }
2108
2109 static FolderItem *imap_create_special_folder(Folder *folder,
2110                                               SpecialFolderItemType stype,
2111                                               const gchar *name)
2112 {
2113         FolderItem *item;
2114         FolderItem *new_item;
2115
2116         g_return_val_if_fail(folder != NULL, NULL);
2117         g_return_val_if_fail(folder->node != NULL, NULL);
2118         g_return_val_if_fail(folder->node->data != NULL, NULL);
2119         g_return_val_if_fail(folder->account != NULL, NULL);
2120         g_return_val_if_fail(name != NULL, NULL);
2121
2122         item = FOLDER_ITEM(folder->node->data);
2123         new_item = imap_create_folder(folder, item, name);
2124
2125         if (!new_item) {
2126                 g_warning("Can't create '%s'\n", name);
2127                 if (!folder->inbox) return NULL;
2128
2129                 new_item = imap_create_folder(folder, folder->inbox, name);
2130                 if (!new_item)
2131                         g_warning("Can't create '%s' under INBOX\n", name);
2132                 else
2133                         new_item->stype = stype;
2134         } else
2135                 new_item->stype = stype;
2136
2137         return new_item;
2138 }
2139
2140 static gchar *imap_folder_get_path(Folder *folder)
2141 {
2142         gchar *folder_path;
2143
2144         g_return_val_if_fail(folder != NULL, NULL);
2145         g_return_val_if_fail(folder->account != NULL, NULL);
2146
2147         folder_path = g_strconcat(get_imap_cache_dir(),
2148                                   G_DIR_SEPARATOR_S,
2149                                   folder->account->recv_server,
2150                                   G_DIR_SEPARATOR_S,
2151                                   folder->account->userid,
2152                                   NULL);
2153
2154         return folder_path;
2155 }
2156
2157 static gchar *imap_item_get_path(Folder *folder, FolderItem *item)
2158 {
2159         gchar *folder_path, *path;
2160
2161         g_return_val_if_fail(folder != NULL, NULL);
2162         g_return_val_if_fail(item != NULL, NULL);
2163         folder_path = imap_folder_get_path(folder);
2164
2165         g_return_val_if_fail(folder_path != NULL, NULL);
2166         if (folder_path[0] == G_DIR_SEPARATOR) {
2167                 if (item->path)
2168                         path = g_strconcat(folder_path, G_DIR_SEPARATOR_S,
2169                                            item->path, NULL);
2170                 else
2171                         path = g_strdup(folder_path);
2172         } else {
2173                 if (item->path)
2174                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
2175                                            folder_path, G_DIR_SEPARATOR_S,
2176                                            item->path, NULL);
2177                 else
2178                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
2179                                            folder_path, NULL);
2180         }
2181         g_free(folder_path);
2182
2183         return path;
2184 }
2185
2186 static FolderItem *imap_create_folder(Folder *folder, FolderItem *parent,
2187                                const gchar *name)
2188 {
2189         gchar *dirpath, *imap_path;
2190         IMAPSession *session;
2191         FolderItem *new_item;
2192         gchar separator;
2193         gchar *new_name;
2194         const gchar *p;
2195         gint ok;
2196         gboolean no_select = FALSE, no_sub = FALSE;
2197         gboolean exist = FALSE;
2198
2199         g_return_val_if_fail(folder != NULL, NULL);
2200         g_return_val_if_fail(folder->account != NULL, NULL);
2201         g_return_val_if_fail(parent != NULL, NULL);
2202         g_return_val_if_fail(name != NULL, NULL);
2203
2204         debug_print("getting session...\n");
2205         session = imap_session_get(folder);
2206         if (!session) {
2207                 return NULL;
2208         }
2209
2210         if (!folder_item_parent(parent) && strcmp(name, "INBOX") == 0) {
2211                 dirpath = g_strdup(name);
2212         }else if (parent->path)
2213                 dirpath = g_strconcat(parent->path, "/", name, NULL);
2214         else if ((p = strchr(name, '/')) != NULL && *(p + 1) != '\0')
2215                 dirpath = g_strdup(name);
2216         else if (folder->account->imap_dir && *folder->account->imap_dir) {
2217                 gchar *imap_dir;
2218
2219                 Xstrdup_a(imap_dir, folder->account->imap_dir, {unlock_session(session);return NULL;});
2220                 strtailchomp(imap_dir, '/');
2221                 dirpath = g_strconcat(imap_dir, "/", name, NULL);
2222         } else
2223                 dirpath = g_strdup(name);
2224
2225
2226
2227         /* keep trailing directory separator to create a folder that contains
2228            sub folder */
2229         imap_path = imap_utf8_to_modified_utf7(dirpath);
2230
2231         strtailchomp(dirpath, '/');
2232         Xstrdup_a(new_name, name, {
2233                 g_free(dirpath);
2234                 unlock_session(session);
2235                 return NULL;});
2236
2237         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), imap_path);
2238         imap_path_separator_subst(imap_path, separator);
2239         /* remove trailing / for display */
2240         strtailchomp(new_name, '/');
2241
2242         if (strcmp(dirpath, "INBOX") != 0) {
2243                 GPtrArray *argbuf;
2244                 int r;
2245                 clist * lep_list;
2246
2247                 argbuf = g_ptr_array_new();
2248                 r = imap_threaded_list(folder, "", imap_path, &lep_list);
2249                 if (r != MAILIMAP_NO_ERROR) {
2250                         log_warning(LOG_PROTOCOL, _("can't create mailbox: LIST failed\n"));
2251                         g_free(imap_path);
2252                         g_free(dirpath);
2253                         ptr_array_free_strings(argbuf);
2254                         g_ptr_array_free(argbuf, TRUE);
2255                         unlock_session(session);
2256                         return NULL;
2257                 }
2258
2259                 if (clist_count(lep_list) > 0)
2260                         exist = TRUE;
2261                 mailimap_list_result_free(lep_list);
2262                 lep_list = NULL;
2263                 if (!exist) {
2264                         ok = imap_cmd_create(session, imap_path);
2265                         if (ok != IMAP_SUCCESS) {
2266                                 log_warning(LOG_PROTOCOL, _("can't create mailbox\n"));
2267                                 g_free(imap_path);
2268                                 g_free(dirpath);
2269                                 unlock_session(session);
2270                                 if (ok == MAILIMAP_ERROR_STREAM) {
2271                                         imap_disc_session_destroy(folder);
2272                                         session = NULL;
2273                                 }
2274                                 return NULL;
2275                         }
2276                         r = imap_threaded_list(folder, "", imap_path, &lep_list);
2277                         if (r == MAILIMAP_NO_ERROR) {
2278                                 GSList *item_list = imap_list_from_lep(IMAP_FOLDER(folder),
2279                                                lep_list, dirpath, TRUE);
2280                                 if (item_list) {
2281                                         FolderItem *cur_item = FOLDER_ITEM(item_list->data);
2282                                         no_select = cur_item->no_select;
2283                                         no_sub = cur_item->no_sub;
2284                                         g_slist_free(item_list);
2285                                 }
2286                                 mailimap_list_result_free(lep_list);
2287                         }
2288                 }
2289                 imap_threaded_subscribe(folder, imap_path, TRUE);
2290         } else {
2291                 clist *lep_list;
2292                 int r;
2293                 /* just get flags */
2294                 r = imap_threaded_list(folder, "", "INBOX", &lep_list);
2295                 if (r == MAILIMAP_NO_ERROR) {
2296                         GSList *item_list = imap_list_from_lep(IMAP_FOLDER(folder),
2297                                        lep_list, dirpath, TRUE);
2298                         if (item_list) {
2299                                 FolderItem *cur_item = FOLDER_ITEM(item_list->data);
2300                                 no_select = cur_item->no_select;
2301                                 no_sub = cur_item->no_sub;
2302                                 g_slist_free(item_list);
2303                         }
2304                         mailimap_list_result_free(lep_list);
2305                 }
2306         }
2307
2308         new_item = folder_item_new(folder, new_name, dirpath);
2309         new_item->no_select = no_select;
2310         new_item->no_sub = no_sub;
2311         folder_item_append(parent, new_item);
2312         g_free(imap_path);
2313         g_free(dirpath);
2314
2315         dirpath = folder_item_get_path(new_item);
2316         if (!is_dir_exist(dirpath))
2317                 make_dir_hier(dirpath);
2318         g_free(dirpath);
2319         unlock_session(session);
2320
2321         if (exist) {
2322                 /* folder existed, scan it */
2323                 imap_scan_required(folder, new_item);
2324                 folder_item_scan_full(new_item, FALSE);
2325         }
2326
2327         return new_item;
2328 }
2329
2330 static gint imap_rename_folder(Folder *folder, FolderItem *item,
2331                                const gchar *name)
2332 {
2333         gchar *dirpath;
2334         gchar *newpath;
2335         gchar *real_oldpath;
2336         gchar *real_newpath;
2337         gchar *paths[2];
2338         gchar *old_cache_dir;
2339         gchar *new_cache_dir;
2340         IMAPSession *session;
2341         gchar separator;
2342         gint ok;
2343         gint exists, recent, unseen;
2344         guint32 uid_validity;
2345
2346         g_return_val_if_fail(folder != NULL, -1);
2347         g_return_val_if_fail(item != NULL, -1);
2348         g_return_val_if_fail(item->path != NULL, -1);
2349         g_return_val_if_fail(name != NULL, -1);
2350
2351         debug_print("getting session...\n");
2352         session = imap_session_get(folder);
2353         if (!session) {
2354                 return -1;
2355         }
2356
2357         if (strchr(name, imap_get_path_separator(session, IMAP_FOLDER(folder), item->path)) != NULL) {
2358                 g_warning(_("New folder name must not contain the namespace "
2359                             "path separator"));
2360                 unlock_session(session);
2361                 return -1;
2362         }
2363
2364         real_oldpath = imap_get_real_path(session, IMAP_FOLDER(folder), item->path);
2365
2366         g_free(session->mbox);
2367         session->mbox = NULL;
2368         session->exists = 0;
2369         session->recent = 0;
2370         session->expunge = 0;
2371         ok = imap_cmd_examine(session, "INBOX",
2372                               &exists, &recent, &unseen, &uid_validity, FALSE);
2373         if (ok != IMAP_SUCCESS) {
2374                 g_free(real_oldpath);
2375                 unlock_session(session);
2376                 if (ok == MAILIMAP_ERROR_STREAM) {
2377                         imap_disc_session_destroy(folder);
2378                         session = NULL;
2379                 }
2380                 return -1;
2381         }
2382
2383         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), item->path);
2384         if (strchr(item->path, G_DIR_SEPARATOR)) {
2385                 dirpath = g_path_get_dirname(item->path);
2386                 newpath = g_strconcat(dirpath, G_DIR_SEPARATOR_S, name, NULL);
2387                 g_free(dirpath);
2388         } else
2389                 newpath = g_strdup(name);
2390
2391         real_newpath = imap_utf8_to_modified_utf7(newpath);
2392         imap_path_separator_subst(real_newpath, separator);
2393
2394         ok = imap_cmd_rename(session, real_oldpath, real_newpath);
2395         if (ok != IMAP_SUCCESS) {
2396                 log_warning(LOG_PROTOCOL, _("can't rename mailbox: %s to %s\n"),
2397                             real_oldpath, real_newpath);
2398                 g_free(real_oldpath);
2399                 g_free(newpath);
2400                 g_free(real_newpath);
2401                 unlock_session(session);
2402                 if (ok == MAILIMAP_ERROR_STREAM) {
2403                         imap_disc_session_destroy(folder);
2404                         session = NULL;
2405                 }
2406                 return -1;
2407         }
2408         g_free(item->name);
2409         item->name = g_strdup(name);
2410
2411         old_cache_dir = folder_item_get_path(item);
2412
2413         paths[0] = g_strdup(item->path);
2414         paths[1] = newpath;
2415         g_node_traverse(item->node, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
2416                         imap_rename_folder_func, paths);
2417
2418         if (is_dir_exist(old_cache_dir)) {
2419                 new_cache_dir = folder_item_get_path(item);
2420                 if (rename(old_cache_dir, new_cache_dir) < 0) {
2421                         FILE_OP_ERROR(old_cache_dir, "rename");
2422                 }
2423                 g_free(new_cache_dir);
2424         }
2425
2426         g_free(old_cache_dir);
2427         g_free(paths[0]);
2428         g_free(newpath);
2429         g_free(real_oldpath);
2430         g_free(real_newpath);
2431         unlock_session(session);
2432         return 0;
2433 }
2434
2435 gint imap_subscribe(Folder *folder, FolderItem *item, gchar *rpath, gboolean sub)
2436 {
2437         gchar *path;
2438         gint r = -1;
2439         IMAPSession *session;
2440         debug_print("getting session...\n");
2441
2442         session = imap_session_get(folder);
2443         if (!session) {
2444                 return -1;
2445         }
2446         if (item && item->path) {
2447                 path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path);
2448                 if (!path)
2449                         return -1;
2450                 if (!strcmp(path, "INBOX") && sub == FALSE)
2451                         return -1;
2452                 debug_print("%ssubscribing %s\n", sub?"":"un", path);
2453                 r = imap_threaded_subscribe(folder, path, sub);
2454                 g_free(path);
2455         } else if (rpath) {
2456                 r = imap_threaded_subscribe(folder, rpath, sub);
2457         } else
2458                 return -1;
2459         return r;
2460 }
2461
2462 static gint imap_remove_folder_real(Folder *folder, FolderItem *item)
2463 {
2464         gint ok;
2465         IMAPSession *session;
2466         gchar *path;
2467         gchar *cache_dir;
2468         gboolean selected_folder;
2469
2470         g_return_val_if_fail(folder != NULL, -1);
2471         g_return_val_if_fail(item != NULL, -1);
2472         g_return_val_if_fail(item->path != NULL, -1);
2473
2474         debug_print("getting session...\n");
2475         session = imap_session_get(folder);
2476         if (!session) {
2477                 return -1;
2478         }
2479         path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path);
2480
2481         imap_threaded_subscribe(folder, path, FALSE);
2482
2483         selected_folder = (session->mbox != NULL) &&
2484                           (!strcmp(session->mbox, item->path));
2485         if (selected_folder) {
2486                 ok = imap_cmd_close(session);
2487                 if (ok != MAILIMAP_NO_ERROR) {
2488                         debug_print("close err %d\n", ok);
2489                         if (ok == MAILIMAP_ERROR_STREAM) {
2490                                 imap_disc_session_destroy(folder);
2491                                 session = NULL;
2492                         }
2493                         return IMAP_ERROR;
2494                 }
2495         }
2496         ok = imap_cmd_delete(session, path);
2497         if (ok != IMAP_SUCCESS) {
2498                 gchar *tmp = g_strdup_printf("%s%c", path,
2499                                 imap_get_path_separator(session, IMAP_FOLDER(folder), path));
2500                 g_free(path);
2501                 path = tmp;
2502                 ok = imap_cmd_delete(session, path);
2503         }
2504
2505         if (ok != IMAP_SUCCESS) {
2506                 log_warning(LOG_PROTOCOL, _("can't delete mailbox\n"));
2507                 g_free(path);
2508                 unlock_session(session);
2509                 if (ok == MAILIMAP_ERROR_STREAM) {
2510                         imap_disc_session_destroy(folder);
2511                         session = NULL;
2512                 }
2513                 return -1;
2514         }
2515
2516         g_free(path);
2517         cache_dir = folder_item_get_path(item);
2518         if (is_dir_exist(cache_dir) && remove_dir_recursive(cache_dir) < 0)
2519                 g_warning("can't remove directory '%s'\n", cache_dir);
2520         g_free(cache_dir);
2521         folder_item_remove(item);
2522         unlock_session(session);
2523         return 0;
2524 }
2525
2526 static gint imap_remove_folder(Folder *folder, FolderItem *item)
2527 {
2528         GNode *node, *next;
2529
2530         g_return_val_if_fail(item != NULL, -1);
2531         g_return_val_if_fail(item->folder != NULL, -1);
2532         g_return_val_if_fail(item->node != NULL, -1);
2533
2534         node = item->node->children;
2535         while (node != NULL) {
2536                 next = node->next;
2537                 if (imap_remove_folder(folder, FOLDER_ITEM(node->data)) < 0)
2538                         return -1;
2539                 node = next;
2540         }
2541         debug_print("IMAP removing %s\n", item->path);
2542
2543         if (imap_remove_all_msg(folder, item) < 0)
2544                 return -1;
2545         return imap_remove_folder_real(folder, item);
2546 }
2547
2548 typedef struct _uncached_data {
2549         IMAPSession *session;
2550         FolderItem *item;
2551         MsgNumberList *numlist;
2552         guint cur;
2553         guint total;
2554         gboolean done;
2555 } uncached_data;
2556
2557 static void *imap_get_uncached_messages_thread(void *data)
2558 {
2559         uncached_data *stuff = (uncached_data *)data;
2560         IMAPSession *session = stuff->session;
2561         FolderItem *item = stuff->item;
2562         MsgNumberList *numlist = stuff->numlist;
2563
2564         GSList *newlist = NULL;
2565         GSList *llast = NULL;
2566         GSList *seq_list, *cur;
2567
2568         debug_print("uncached_messages\n");
2569
2570         if (session == NULL || item == NULL || item->folder == NULL
2571             || FOLDER_CLASS(item->folder) != &imap_class) {
2572                 stuff->done = TRUE;
2573                 return NULL;
2574         }
2575
2576         seq_list = imap_get_lep_set_from_numlist(numlist);
2577         debug_print("get msgs info\n");
2578         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
2579                 struct mailimap_set * imapset;
2580                 unsigned int i;
2581                 int r;
2582                 carray * env_list;
2583                 int count;
2584
2585                 if (session->cancelled)
2586                         break;
2587
2588                 imapset = cur->data;
2589
2590                 r = imap_threaded_fetch_env(session->folder,
2591                                             imapset, &env_list);
2592                 if (r != MAILIMAP_NO_ERROR)
2593                         continue;
2594
2595                 session_set_access_time(SESSION(session));
2596
2597                 count = 0;
2598                 for(i = 0 ; i < carray_count(env_list) ; i ++) {
2599                         struct imap_fetch_env_info * info;
2600                         MsgInfo * msginfo;
2601
2602                         info = carray_get(env_list, i);
2603                         msginfo = imap_envelope_from_lep(info, item);
2604                         if (msginfo == NULL)
2605                                 continue;
2606                         msginfo->folder = item;
2607                         if (!newlist)
2608                                 llast = newlist = g_slist_append(newlist, msginfo);
2609                         else {
2610                                 llast = g_slist_append(llast, msginfo);
2611                                 llast = llast->next;
2612                         }
2613                         count ++;
2614                 }
2615
2616                 imap_fetch_env_free(env_list);
2617         }
2618
2619         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
2620                 struct mailimap_set * imapset;
2621
2622                 imapset = cur->data;
2623                 mailimap_set_free(imapset);
2624         }
2625
2626         session_set_access_time(SESSION(session));
2627         stuff->done = TRUE;
2628         return newlist;
2629 }
2630
2631 #define MAX_MSG_NUM 50
2632
2633 static GSList *imap_get_uncached_messages(IMAPSession *session,
2634                                         FolderItem *item,
2635                                         MsgNumberList *numlist)
2636 {
2637         GSList *result = NULL;
2638         GSList * cur;
2639         uncached_data *data = g_new0(uncached_data, 1);
2640         int finished;
2641
2642         finished = 0;
2643         cur = numlist;
2644         data->total = g_slist_length(numlist);
2645         debug_print("messages list : %i\n", data->total);
2646
2647         while (cur != NULL) {
2648                 GSList * partial_result;
2649                 int count;
2650                 GSList * newlist;
2651                 GSList * llast;
2652
2653                 llast = NULL;
2654                 count = 0;
2655                 newlist = NULL;
2656                 while (count < MAX_MSG_NUM) {
2657                         void * p;
2658
2659                         p = cur->data;
2660
2661                         if (newlist == NULL)
2662                                 llast = newlist = g_slist_append(newlist, p);
2663                         else {
2664                                 llast = g_slist_append(llast, p);
2665                                 llast = llast->next;
2666                         }
2667                         count ++;
2668
2669                         cur = cur->next;
2670                         if (cur == NULL)
2671                                 break;
2672                 }
2673
2674                 data->done = FALSE;
2675                 data->session = session;
2676                 data->item = item;
2677                 data->numlist = newlist;
2678                 data->cur += count;
2679
2680                 if (prefs_common.work_offline &&
2681                     !inc_offline_should_override(FALSE,
2682                         _("Claws Mail needs network access in order "
2683                           "to access the IMAP server."))) {
2684                         g_free(data);
2685                         return NULL;
2686                 }
2687
2688                 partial_result =
2689                         (GSList *)imap_get_uncached_messages_thread(data);
2690
2691                 statusbar_progress_all(data->cur,data->total, 1);
2692
2693                 g_slist_free(newlist);
2694
2695                 result = g_slist_concat(result, partial_result);
2696         }
2697         g_free(data);
2698
2699         statusbar_progress_all(0,0,0);
2700         statusbar_pop_all();
2701
2702         return result;
2703 }
2704
2705 static void imap_delete_all_cached_messages(FolderItem *item)
2706 {
2707         gchar *dir;
2708
2709         g_return_if_fail(item != NULL);
2710         g_return_if_fail(item->folder != NULL);
2711         g_return_if_fail(FOLDER_CLASS(item->folder) == &imap_class);
2712
2713         debug_print("Deleting all cached messages...\n");
2714
2715         dir = folder_item_get_path(item);
2716         if (is_dir_exist(dir))
2717                 remove_all_numbered_files(dir);
2718         g_free(dir);
2719
2720         debug_print("done.\n");
2721 }
2722
2723 gchar imap_get_path_separator_for_item(FolderItem *item)
2724 {
2725         Folder *folder = NULL;
2726         IMAPFolder *imap_folder = NULL;
2727         IMAPSession *session = NULL;
2728         gchar result = '/';
2729
2730         if (!item)
2731                 return '/';
2732         folder = item->folder;
2733
2734         if (!folder)
2735                 return '/';
2736
2737         imap_folder = IMAP_FOLDER(folder);
2738
2739         if (!imap_folder)
2740                 return '/';
2741
2742         debug_print("getting session...");
2743         session = imap_session_get(FOLDER(folder));
2744         result = imap_get_path_separator(session, imap_folder, item->path);
2745         unlock_session(session);
2746         return result;
2747 }
2748
2749 static gchar imap_refresh_path_separator(IMAPSession *session, IMAPFolder *folder, const gchar *subfolder)
2750 {
2751         clist * lep_list;
2752         int r;
2753         gchar separator = '\0';
2754
2755         g_return_val_if_fail(session != NULL, '/');
2756         r = imap_threaded_list((Folder *)folder, "", subfolder, &lep_list);
2757
2758         if (r != MAILIMAP_NO_ERROR) {
2759                 log_warning(LOG_PROTOCOL, _("LIST failed\n"));
2760                 return '\0';
2761         }
2762
2763         if (clist_count(lep_list) > 0) {
2764                 clistiter * iter = clist_begin(lep_list);
2765                 struct mailimap_mailbox_list * mb;
2766                 mb = clist_content(iter);
2767
2768                 separator = mb->mb_delimiter;
2769                 debug_print("got separator: %c\n", folder->last_seen_separator);
2770         }
2771         mailimap_list_result_free(lep_list);
2772         return separator;
2773 }
2774
2775 static gchar imap_get_path_separator(IMAPSession *session, IMAPFolder *folder, const gchar *path)
2776 {
2777         gchar separator = '/';
2778
2779         if (folder->last_seen_separator == 0) {
2780                 folder->last_seen_separator = imap_refresh_path_separator(session, folder, "");
2781         }
2782
2783         if (folder->last_seen_separator == 0) {
2784                 folder->last_seen_separator = imap_refresh_path_separator(session, folder, "INBOX");
2785         }
2786
2787         if (folder->last_seen_separator != 0) {
2788                 debug_print("using separator: %c\n", folder->last_seen_separator);
2789                 return folder->last_seen_separator;
2790         }
2791
2792         return separator;
2793 }
2794
2795 static gchar *imap_get_real_path(IMAPSession *session, IMAPFolder *folder, const gchar *path)
2796 {
2797         gchar *real_path;
2798         gchar separator;
2799
2800         g_return_val_if_fail(folder != NULL, NULL);
2801         g_return_val_if_fail(path != NULL, NULL);
2802
2803         real_path = imap_utf8_to_modified_utf7(path);
2804         separator = imap_get_path_separator(session, folder, path);
2805         imap_path_separator_subst(real_path, separator);
2806
2807         return real_path;
2808 }
2809
2810 static gint imap_set_message_flags(IMAPSession *session,
2811                                    MsgNumberList *numlist,
2812                                    IMAPFlags flags,
2813                                    gboolean is_set)
2814 {
2815         gint ok = 0;
2816         GSList *seq_list;
2817         GSList * cur;
2818
2819         seq_list = imap_get_lep_set_from_numlist(numlist);
2820
2821         for(cur = seq_list ; cur != NULL ; cur = g_slist_next(cur)) {
2822                 struct mailimap_set * imapset;
2823
2824                 imapset = cur->data;
2825
2826                 ok = imap_cmd_store(session, imapset,
2827                                     flags, is_set);
2828         }
2829
2830         imap_lep_set_free(seq_list);
2831
2832         return IMAP_SUCCESS;
2833 }
2834
2835 typedef struct _select_data {
2836         IMAPSession *session;
2837         gchar *real_path;
2838         gint *exists;
2839         gint *recent;
2840         gint *unseen;
2841         guint32 *uid_validity;
2842         gboolean done;
2843 } select_data;
2844
2845 static gint imap_select(IMAPSession *session, IMAPFolder *folder,
2846                         const gchar *path,
2847                         gint *exists, gint *recent, gint *unseen,
2848                         guint32 *uid_validity, gboolean block)
2849 {
2850         gchar *real_path;
2851         gint ok;
2852         gint exists_, recent_, unseen_;
2853         guint32 uid_validity_;
2854
2855         if (!exists && !recent && !unseen && !uid_validity) {
2856                 if (session->mbox && strcmp(session->mbox, path) == 0)
2857                         return IMAP_SUCCESS;
2858         }
2859         if (!exists)
2860                 exists = &exists_;
2861         if (!recent)
2862                 recent = &recent_;
2863         if (!unseen)
2864                 unseen = &unseen_;
2865         if (!uid_validity)
2866                 uid_validity = &uid_validity_;
2867
2868         g_free(session->mbox);
2869         session->mbox = NULL;
2870         session->exists = 0;
2871         session->recent = 0;
2872         session->expunge = 0;
2873
2874         real_path = imap_get_real_path(session, folder, path);
2875
2876         ok = imap_cmd_select(session, real_path,
2877                              exists, recent, unseen, uid_validity, block);
2878         if (ok != IMAP_SUCCESS) {
2879                 log_warning(LOG_PROTOCOL, _("can't select folder: %s\n"), real_path);
2880                 if (ok == MAILIMAP_ERROR_STREAM) {
2881                         imap_disc_session_destroy(FOLDER(folder));
2882                         session = NULL;
2883                 }
2884         } else {
2885                 session->mbox = g_strdup(path);
2886                 session->folder_content_changed = FALSE;
2887                 session->exists = *exists;
2888                 session->recent = *recent;
2889                 session->expunge = 0;
2890                 session->unseen = *unseen;
2891                 session->uid_validity = *uid_validity;
2892                 debug_print("select: exists %d recent %d expunge %d uid_validity %d\n",
2893                         session->exists, session->recent, session->expunge,
2894                         session->uid_validity);
2895         }
2896         g_free(real_path);
2897
2898         return ok;
2899 }
2900
2901 static gint imap_status(IMAPSession *session, IMAPFolder *folder,
2902                         const gchar *path, IMAPFolderItem *item,
2903                         gint *messages,
2904                         guint32 *uid_next, guint32 *uid_validity,
2905                         gint *unseen, gboolean block)
2906 {
2907         int r;
2908         clistiter * iter;
2909         struct mailimap_mailbox_data_status * data_status;
2910         int got_values;
2911         gchar *real_path;
2912         guint mask = 0;
2913
2914         real_path = imap_get_real_path(session, folder, path);
2915
2916         if (messages) {
2917                 mask |= 1 << 0;
2918                 *messages = 0;
2919         }
2920         if (uid_next) {
2921                 mask |= 1 << 2;
2922                 *uid_next = 0;
2923         }
2924         if (uid_validity) {
2925                 mask |= 1 << 3;
2926                 *uid_validity = 0;
2927         }
2928         if (unseen) {
2929                 mask |= 1 << 4;
2930                 *unseen = 0;
2931         }
2932
2933         if (session->mbox != NULL &&
2934             !strcmp(session->mbox, item->item.path)) {
2935                 r = imap_cmd_close(session);
2936                 if (r != MAILIMAP_NO_ERROR) {
2937                         debug_print("close err %d\n", r);
2938                         return IMAP_ERROR;
2939                 }
2940         }
2941
2942         r = imap_threaded_status(FOLDER(folder), real_path,
2943                 &data_status, mask);
2944
2945         g_free(real_path);
2946         if (r != MAILIMAP_NO_ERROR) {
2947                 debug_print("status err %d\n", r);
2948                 return r;
2949         }
2950
2951         if (data_status->st_info_list == NULL) {
2952                 mailimap_mailbox_data_status_free(data_status);
2953                 debug_print("status->st_info_list == NULL\n");
2954                 return IMAP_ERROR;
2955         }
2956
2957         got_values = 0;
2958         for(iter = clist_begin(data_status->st_info_list) ; iter != NULL ;
2959             iter = clist_next(iter)) {
2960                 struct mailimap_status_info * info;
2961
2962                 info = clist_content(iter);
2963                 switch (info->st_att) {
2964                 case MAILIMAP_STATUS_ATT_MESSAGES:
2965                         if (messages) {
2966                                 * messages = info->st_value;
2967                                 got_values |= 1 << 0;
2968                         }
2969                         break;
2970
2971                 case MAILIMAP_STATUS_ATT_UIDNEXT:
2972                         if (uid_next) {
2973                                 * uid_next = info->st_value;
2974                                 got_values |= 1 << 2;
2975                         }
2976                         break;
2977
2978                 case MAILIMAP_STATUS_ATT_UIDVALIDITY:
2979                         if (uid_validity) {
2980                                 * uid_validity = info->st_value;
2981                                 got_values |= 1 << 3;
2982                         }
2983                         break;
2984
2985                 case MAILIMAP_STATUS_ATT_UNSEEN:
2986                         if (unseen) {
2987                                 * unseen = info->st_value;
2988                                 got_values |= 1 << 4;
2989                         }
2990                         break;
2991                 }
2992         }
2993         mailimap_mailbox_data_status_free(data_status);
2994
2995         if (got_values != mask) {
2996                 g_warning("status: incomplete values received (%d)\n", got_values);
2997         }
2998         return IMAP_SUCCESS;
2999 }
3000
3001 static void imap_free_capabilities(IMAPSession *session)
3002 {
3003         slist_free_strings(session->capability);
3004         g_slist_free(session->capability);
3005         session->capability = NULL;
3006 }
3007
3008 /* low-level IMAP4rev1 commands */
3009
3010 static gint imap_cmd_login(IMAPSession *session,
3011                            const gchar *user, const gchar *pass,
3012                            const gchar *type)
3013 {
3014         int r;
3015         gint ok;
3016
3017         if (!strcmp(type, "LOGIN") && imap_has_capability(session, "LOGINDISABLED")) {
3018                 gint ok = IMAP_ERROR;
3019                 if (imap_has_capability(session, "STARTTLS")) {
3020 #if (defined(USE_OPENSSL) || defined (USE_GNUTLS))
3021                         log_warning(LOG_PROTOCOL, _("Server requires TLS to log in.\n"));
3022                         ok = imap_cmd_starttls(session);
3023                         if (ok != IMAP_SUCCESS) {
3024                                 log_warning(LOG_PROTOCOL, _("Can't start TLS session.\n"));
3025                                 return IMAP_ERROR;
3026                         } else {
3027                                 /* refresh capas */
3028                                 imap_free_capabilities(session);
3029                                 if (imap_get_capabilities(session) != MAILIMAP_NO_ERROR) {
3030                                         log_warning(LOG_PROTOCOL, _("Can't refresh capabilities.\n"));
3031                                         return IMAP_ERROR;
3032                                 }
3033                         }
3034 #else
3035                         log_error(LOG_PROTOCOL, _("Connection to %s failed: "
3036                                         "server requires TLS, but Claws Mail "
3037                                         "has been compiled without OpenSSL "
3038                                         "support.\n"),
3039                                         SESSION(session)->server);
3040                         return IMAP_ERROR;
3041 #endif
3042                 } else {
3043                         log_error(LOG_PROTOCOL, _("Server logins are disabled.\n"));
3044                         return IMAP_ERROR;
3045                 }
3046         }
3047
3048         log_print(LOG_PROTOCOL, "IMAP4> Logging %s to %s using %s\n",
3049                         user,
3050                         SESSION(session)->server,
3051                         type);
3052         r = imap_threaded_login(session->folder, user, pass, type);
3053         if (r != MAILIMAP_NO_ERROR) {
3054                 log_print(LOG_PROTOCOL, "IMAP4< Error logging in to %s\n",
3055                                 SESSION(session)->server);
3056                 ok = IMAP_ERROR;
3057         } else {
3058                 log_print(LOG_PROTOCOL, "IMAP4< Login to %s successful\n",
3059                                 SESSION(session)->server);
3060                 ok = IMAP_SUCCESS;
3061         }
3062         return ok;
3063 }
3064
3065 static gint imap_cmd_noop(IMAPSession *session)
3066 {
3067         int r;
3068         unsigned int exists, recent, expunge, unseen, uidnext, uidval;
3069
3070         r = imap_threaded_noop(session->folder, &exists, &recent, &expunge, &unseen, &uidnext, &uidval);
3071         if (r != MAILIMAP_NO_ERROR) {
3072                 debug_print("noop err %d\n", r);
3073                 return IMAP_ERROR;
3074         }
3075
3076         session->folder_content_changed = FALSE;
3077
3078         if ((exists && exists != session->exists)
3079          || (recent && recent != session->recent)
3080          || (expunge && expunge != session->expunge)
3081          || (unseen && unseen != session->unseen)) {
3082                 session->folder_content_changed = TRUE;
3083         }
3084         if (uidnext != 0 && uidnext != session->uid_next) {
3085                 session->uid_next = uidnext;
3086                 session->folder_content_changed = TRUE;
3087         }
3088         if (uidval != 0 && uidval != session->uid_validity) {
3089                 session->uid_validity = uidval;
3090                 session->folder_content_changed = TRUE;
3091         }
3092
3093         session->exists = exists;
3094         session->recent = recent;
3095         session->expunge = expunge;
3096         session->unseen = unseen;
3097
3098         session_set_access_time(SESSION(session));
3099
3100         return IMAP_SUCCESS;
3101 }
3102
3103 #if (defined(USE_OPENSSL) || defined (USE_GNUTLS))
3104 static gint imap_cmd_starttls(IMAPSession *session)
3105 {
3106         int r;
3107
3108         r = imap_threaded_starttls(session->folder,
3109                 SESSION(session)->server, SESSION(session)->port);
3110         if (r != MAILIMAP_NO_ERROR) {
3111                 debug_print("starttls err %d\n", r);
3112                 return IMAP_ERROR;
3113         }
3114         return IMAP_SUCCESS;
3115 }
3116 #endif
3117
3118 static gint imap_cmd_select(IMAPSession *session, const gchar *folder,
3119                             gint *exists, gint *recent, gint *unseen,
3120                             guint32 *uid_validity, gboolean block)
3121 {
3122         int r;
3123
3124         r = imap_threaded_select(session->folder, folder,
3125                                  exists, recent, unseen, uid_validity);
3126         if (r != MAILIMAP_NO_ERROR) {
3127                 debug_print("select err %d\n", r);
3128                 return r;
3129         }
3130         return IMAP_SUCCESS;
3131 }
3132
3133 static gint imap_cmd_close(IMAPSession *session)
3134 {
3135         int r;
3136
3137         r = imap_threaded_close(session->folder);
3138         if (r != MAILIMAP_NO_ERROR) {
3139                 debug_print("close err %d\n", r);
3140                 return IMAP_ERROR;
3141         }
3142         g_free(session->mbox);
3143         session->mbox = NULL;
3144         session->exists = 0;
3145         session->recent = 0;
3146         session->expunge = 0;
3147         return IMAP_SUCCESS;
3148 }
3149
3150 static gint imap_cmd_examine(IMAPSession *session, const gchar *folder,
3151                              gint *exists, gint *recent, gint *unseen,
3152                              guint32 *uid_validity, gboolean block)
3153 {
3154         int r;
3155
3156         r = imap_threaded_examine(session->folder, folder,
3157                                   exists, recent, unseen, uid_validity);
3158         if (r != MAILIMAP_NO_ERROR) {
3159                 debug_print("examine err %d\n", r);
3160
3161                 return IMAP_ERROR;
3162         }
3163         return IMAP_SUCCESS;
3164 }
3165
3166 static gint imap_cmd_create(IMAPSession *session, const gchar *folder)
3167 {
3168         int r;
3169
3170         r = imap_threaded_create(session->folder, folder);
3171         if (r != MAILIMAP_NO_ERROR) {
3172
3173                 return IMAP_ERROR;
3174         }
3175
3176         return IMAP_SUCCESS;
3177 }
3178
3179 static gint imap_cmd_rename(IMAPSession *session, const gchar *old_folder,
3180                             const gchar *new_folder)
3181 {
3182         int r;
3183
3184         r = imap_threaded_rename(session->folder, old_folder,
3185                                  new_folder);
3186         if (r != MAILIMAP_NO_ERROR) {
3187
3188                 return IMAP_ERROR;
3189         }
3190
3191         return IMAP_SUCCESS;
3192 }
3193
3194 static gint imap_cmd_delete(IMAPSession *session, const gchar *folder)
3195 {
3196         int r;
3197
3198
3199         r = imap_threaded_delete(session->folder, folder);
3200         if (r != MAILIMAP_NO_ERROR) {
3201
3202                 return IMAP_ERROR;
3203         }
3204
3205         return IMAP_SUCCESS;
3206 }
3207
3208 typedef struct _fetch_data {
3209         IMAPSession *session;
3210         guint32 uid;
3211         const gchar *filename;
3212         gboolean headers;
3213         gboolean body;
3214         gboolean done;
3215 } fetch_data;
3216
3217 static void *imap_cmd_fetch_thread(void *data)
3218 {
3219         fetch_data *stuff = (fetch_data *)data;
3220         IMAPSession *session = stuff->session;
3221         guint32 uid = stuff->uid;
3222         const gchar *filename = stuff->filename;
3223         int r;
3224
3225         if (stuff->body) {
3226                 r = imap_threaded_fetch_content(session->folder,
3227                                                uid, 1, filename);
3228         }
3229         else {
3230                 r = imap_threaded_fetch_content(session->folder,
3231                                                 uid, 0, filename);
3232         }
3233         if (r != MAILIMAP_NO_ERROR) {
3234                 debug_print("fetch err %d\n", r);
3235                 return GINT_TO_POINTER(IMAP_ERROR);
3236         }
3237         return GINT_TO_POINTER(IMAP_SUCCESS);
3238 }
3239
3240 static gint imap_cmd_fetch(IMAPSession *session, guint32 uid,
3241                                 const gchar *filename, gboolean headers,
3242                                 gboolean body)
3243 {
3244         fetch_data *data = g_new0(fetch_data, 1);
3245         int result = 0;
3246         data->done = FALSE;
3247         data->session = session;
3248         data->uid = uid;
3249         data->filename = filename;
3250         data->headers = headers;
3251         data->body = body;
3252
3253         if (prefs_common.work_offline &&
3254             !inc_offline_should_override(FALSE,
3255                 _("Claws Mail needs network access in order "
3256                   "to access the IMAP server."))) {
3257                 g_free(data);
3258                 return -1;
3259         }
3260         statusbar_print_all(_("Fetching message..."));
3261         result = GPOINTER_TO_INT(imap_cmd_fetch_thread(data));
3262         statusbar_pop_all();
3263         g_free(data);
3264         return result;
3265 }
3266
3267
3268 static gint imap_cmd_append(IMAPSession *session, const gchar *destfolder,
3269                             const gchar *file, IMAPFlags flags,
3270                             guint32 *new_uid)
3271 {
3272         struct mailimap_flag_list * flag_list;
3273         int r;
3274
3275         g_return_val_if_fail(file != NULL, IMAP_ERROR);
3276
3277         flag_list = imap_flag_to_lep(flags);
3278         r = imap_threaded_append(session->folder, destfolder,
3279                          file, flag_list, (int *)new_uid);
3280         mailimap_flag_list_free(flag_list);
3281
3282         if (r != MAILIMAP_NO_ERROR) {
3283                 debug_print("append err %d\n", r);
3284                 return IMAP_ERROR;
3285         }
3286         return IMAP_SUCCESS;
3287 }
3288
3289 static gint imap_cmd_copy(IMAPSession *session, struct mailimap_set * set,
3290                           const gchar *destfolder, GRelation *uid_mapping,
3291                           struct mailimap_set **source, struct mailimap_set **dest)
3292 {
3293         int r;
3294
3295         g_return_val_if_fail(session != NULL, IMAP_ERROR);
3296         g_return_val_if_fail(set != NULL, IMAP_ERROR);
3297         g_return_val_if_fail(destfolder != NULL, IMAP_ERROR);
3298
3299         r = imap_threaded_copy(session->folder, set, destfolder, source, dest);
3300         if (r != MAILIMAP_NO_ERROR) {
3301
3302                 return IMAP_ERROR;
3303         }
3304
3305         return IMAP_SUCCESS;
3306 }
3307
3308 static gint imap_cmd_store(IMAPSession *session, struct mailimap_set * set,
3309                            IMAPFlags flags, int do_add)
3310 {
3311         int r;
3312         struct mailimap_flag_list * flag_list;
3313         struct mailimap_store_att_flags * store_att_flags;
3314
3315         flag_list = imap_flag_to_lep(flags);
3316
3317         if (do_add)
3318                 store_att_flags =
3319                         mailimap_store_att_flags_new_add_flags_silent(flag_list);
3320         else
3321                 store_att_flags =
3322                         mailimap_store_att_flags_new_remove_flags_silent(flag_list);
3323
3324         r = imap_threaded_store(session->folder, set, store_att_flags);
3325         mailimap_store_att_flags_free(store_att_flags);
3326         if (r != MAILIMAP_NO_ERROR) {
3327
3328                 return IMAP_ERROR;
3329         }
3330
3331         return IMAP_SUCCESS;
3332 }
3333
3334 static gint imap_cmd_expunge(IMAPSession *session)
3335 {
3336         int r;
3337
3338         if (prefs_common.work_offline &&
3339             !inc_offline_should_override(FALSE,
3340                 _("Claws Mail needs network access in order "
3341                   "to access the IMAP server."))) {
3342                 return -1;
3343         }
3344
3345         r = imap_threaded_expunge(session->folder);
3346         if (r != MAILIMAP_NO_ERROR) {
3347
3348                 return IMAP_ERROR;
3349         }
3350
3351         return IMAP_SUCCESS;
3352 }
3353
3354 static void imap_path_separator_subst(gchar *str, gchar separator)
3355 {
3356         gchar *p;
3357         gboolean in_escape = FALSE;
3358
3359         if (!separator || separator == '/') return;
3360
3361         for (p = str; *p != '\0'; p++) {
3362                 if (*p == '/' && !in_escape)
3363                         *p = separator;
3364                 else if (*p == '&' && *(p + 1) != '-' && !in_escape)
3365                         in_escape = TRUE;
3366                 else if (*p == '-' && in_escape)
3367                         in_escape = FALSE;
3368         }
3369 }
3370
3371 static gchar *imap_modified_utf7_to_utf8(const gchar *mutf7_str)
3372 {
3373         static iconv_t cd = (iconv_t)-1;
3374         static gboolean iconv_ok = TRUE;
3375         GString *norm_utf7;
3376         gchar *norm_utf7_p;
3377         size_t norm_utf7_len;
3378         const gchar *p;
3379         gchar *to_str, *to_p;
3380         size_t to_len;
3381         gboolean in_escape = FALSE;
3382
3383         if (!iconv_ok) return g_strdup(mutf7_str);
3384
3385         if (cd == (iconv_t)-1) {
3386                 cd = iconv_open(CS_INTERNAL, CS_UTF_7);
3387                 if (cd == (iconv_t)-1) {
3388                         g_warning("iconv cannot convert UTF-7 to %s\n",
3389                                   CS_INTERNAL);
3390                         iconv_ok = FALSE;
3391                         return g_strdup(mutf7_str);
3392                 }
3393         }
3394
3395         /* modified UTF-7 to normal UTF-7 conversion */
3396         norm_utf7 = g_string_new(NULL);
3397
3398         for (p = mutf7_str; *p != '\0'; p++) {
3399                 /* replace: '&'  -> '+',
3400                             "&-" -> '&',
3401                             escaped ','  -> '/' */
3402                 if (!in_escape && *p == '&') {
3403                         if (*(p + 1) != '-') {
3404                                 g_string_append_c(norm_utf7, '+');
3405                                 in_escape = TRUE;
3406                         } else {
3407                                 g_string_append_c(norm_utf7, '&');
3408                                 p++;
3409                         }
3410                 } else if (in_escape && *p == ',') {
3411                         g_string_append_c(norm_utf7, '/');
3412                 } else if (in_escape && *p == '-') {
3413                         g_string_append_c(norm_utf7, '-');
3414                         in_escape = FALSE;
3415                 } else {
3416                         g_string_append_c(norm_utf7, *p);
3417                 }
3418         }
3419
3420         norm_utf7_p = norm_utf7->str;
3421         norm_utf7_len = norm_utf7->len;
3422         to_len = strlen(mutf7_str) * 5;
3423         to_p = to_str = g_malloc(to_len + 1);
3424
3425         if (iconv(cd, (ICONV_CONST gchar **)&norm_utf7_p, &norm_utf7_len,
3426                   &to_p, &to_len) == -1) {
3427                 g_warning(_("iconv cannot convert UTF-7 to %s\n"),
3428                           conv_get_locale_charset_str());
3429                 g_string_free(norm_utf7, TRUE);
3430                 g_free(to_str);
3431                 return g_strdup(mutf7_str);
3432         }
3433
3434         /* second iconv() call for flushing */
3435         iconv(cd, NULL, NULL, &to_p, &to_len);
3436         g_string_free(norm_utf7, TRUE);
3437         *to_p = '\0';
3438
3439         return to_str;
3440 }
3441
3442 static gchar *imap_utf8_to_modified_utf7(const gchar *from)
3443 {
3444         static iconv_t cd = (iconv_t)-1;
3445         static gboolean iconv_ok = TRUE;
3446         gchar *norm_utf7, *norm_utf7_p;
3447         size_t from_len, norm_utf7_len;
3448         GString *to_str;
3449         gchar *from_tmp, *to, *p;
3450         gboolean in_escape = FALSE;
3451
3452         if (!iconv_ok) return g_strdup(from);
3453
3454         if (cd == (iconv_t)-1) {
3455                 cd = iconv_open(CS_UTF_7, CS_INTERNAL);
3456                 if (cd == (iconv_t)-1) {
3457                         g_warning(_("iconv cannot convert %s to UTF-7\n"),
3458                                   CS_INTERNAL);
3459                         iconv_ok = FALSE;
3460                         return g_strdup(from);
3461                 }
3462         }
3463
3464         /* UTF-8 to normal UTF-7 conversion */
3465         Xstrdup_a(from_tmp, from, return g_strdup(from));
3466         from_len = strlen(from);
3467         norm_utf7_len = from_len * 5;
3468         Xalloca(norm_utf7, norm_utf7_len + 1, return g_strdup(from));
3469         norm_utf7_p = norm_utf7;
3470
3471 #define IS_PRINT(ch) (isprint(ch) && IS_ASCII(ch))
3472
3473         while (from_len > 0) {
3474                 if (*from_tmp == '+') {
3475                         *norm_utf7_p++ = '+';
3476                         *norm_utf7_p++ = '-';
3477                         norm_utf7_len -= 2;
3478                         from_tmp++;
3479                         from_len--;
3480                 } else if (IS_PRINT(*(guchar *)from_tmp)) {
3481                         /* printable ascii char */
3482                         *norm_utf7_p = *from_tmp;
3483                         norm_utf7_p++;
3484                         norm_utf7_len--;
3485                         from_tmp++;
3486                         from_len--;
3487                 } else {
3488                         size_t conv_len = 0;
3489
3490                         /* unprintable char: convert to UTF-7 */
3491                         p = from_tmp;
3492                         while (!IS_PRINT(*(guchar *)p) && conv_len < from_len) {
3493                                 conv_len += g_utf8_skip[*(guchar *)p];
3494                                 p += g_utf8_skip[*(guchar *)p];
3495                         }
3496
3497                         from_len -= conv_len;
3498                         if (iconv(cd, (ICONV_CONST gchar **)&from_tmp,
3499                                   &conv_len,
3500                                   &norm_utf7_p, &norm_utf7_len) == -1) {
3501                                 g_warning(_("iconv cannot convert UTF-8 to UTF-7\n"));
3502                                 return g_strdup(from);
3503                         }
3504
3505                         /* second iconv() call for flushing */
3506                         iconv(cd, NULL, NULL, &norm_utf7_p, &norm_utf7_len);
3507                 }
3508         }
3509
3510 #undef IS_PRINT
3511
3512         *norm_utf7_p = '\0';
3513         to_str = g_string_new(NULL);
3514         for (p = norm_utf7; p < norm_utf7_p; p++) {
3515                 /* replace: '&' -> "&-",
3516                             '+' -> '&',
3517                             "+-" -> '+',
3518                             BASE64 '/' -> ',' */
3519                 if (!in_escape && *p == '&') {
3520                         g_string_append(to_str, "&-");
3521                 } else if (!in_escape && *p == '+') {
3522                         if (*(p + 1) == '-') {
3523                                 g_string_append_c(to_str, '+');
3524                                 p++;
3525                         } else {
3526                                 g_string_append_c(to_str, '&');
3527                                 in_escape = TRUE;
3528                         }
3529                 } else if (in_escape && *p == '/') {
3530                         g_string_append_c(to_str, ',');
3531                 } else if (in_escape && *p == '-') {
3532                         g_string_append_c(to_str, '-');
3533                         in_escape = FALSE;
3534                 } else {
3535                         g_string_append_c(to_str, *p);
3536                 }
3537         }
3538
3539         if (in_escape) {
3540                 in_escape = FALSE;
3541                 g_string_append_c(to_str, '-');
3542         }
3543
3544         to = to_str->str;
3545         g_string_free(to_str, FALSE);
3546
3547         return to;
3548 }
3549
3550 static gboolean imap_rename_folder_func(GNode *node, gpointer data)
3551 {
3552         FolderItem *item = node->data;
3553         gchar **paths = data;
3554         const gchar *oldpath = paths[0];
3555         const gchar *newpath = paths[1];
3556         gchar *real_oldpath, *real_newpath;
3557         gchar *base;
3558         gchar *new_itempath;
3559         gint oldpathlen;
3560         IMAPSession *session = imap_session_get(item->folder);
3561
3562         oldpathlen = strlen(oldpath);
3563         if (strncmp(oldpath, item->path, oldpathlen) != 0) {
3564                 g_warning("path doesn't match: %s, %s\n", oldpath, item->path);
3565                 return TRUE;
3566         }
3567
3568         base = item->path + oldpathlen;
3569         while (*base == G_DIR_SEPARATOR) base++;
3570         if (*base == '\0')
3571                 new_itempath = g_strdup(newpath);
3572         else
3573                 new_itempath = g_strconcat(newpath, G_DIR_SEPARATOR_S, base,
3574                                            NULL);
3575
3576         real_oldpath = imap_get_real_path(session, IMAP_FOLDER(item->folder), item->path);
3577         g_free(item->path);
3578         item->path = new_itempath;
3579
3580         real_newpath = imap_get_real_path(session, IMAP_FOLDER(item->folder), item->path);
3581
3582         imap_threaded_subscribe(item->folder, real_oldpath, FALSE);
3583         imap_threaded_subscribe(item->folder, real_newpath, TRUE);
3584
3585         g_free(real_oldpath);
3586         g_free(real_newpath);
3587         return FALSE;
3588 }
3589
3590 typedef struct _get_list_uid_data {
3591         Folder *folder;
3592         IMAPSession *session;
3593         IMAPFolderItem *item;
3594         GSList **msgnum_list;
3595         gboolean done;
3596 } get_list_uid_data;
3597
3598 static void *get_list_of_uids_thread(void *data)
3599 {
3600         get_list_uid_data *stuff = (get_list_uid_data *)data;
3601         Folder *folder = stuff->folder;
3602         IMAPFolderItem *item = stuff->item;
3603         GSList **msgnum_list = stuff->msgnum_list;
3604         gint ok, nummsgs = 0, lastuid_old;
3605         IMAPSession *session;
3606         GSList *uidlist, *elem;
3607         int r = -1;
3608         clist * lep_uidlist;
3609
3610         session = stuff->session;
3611         if (session == NULL) {
3612                 stuff->done = TRUE;
3613                 return GINT_TO_POINTER(-1);
3614         }
3615         /* no session locking here, it's already locked by caller */
3616         ok = imap_select(session, IMAP_FOLDER(folder), item->item.path,
3617                          NULL, NULL, NULL, NULL, TRUE);
3618         if (ok != IMAP_SUCCESS) {
3619                 stuff->done = TRUE;
3620                 if (ok == MAILIMAP_ERROR_STREAM) {
3621                         imap_disc_session_destroy(folder);
3622                         session = NULL;
3623                 }
3624                 return GINT_TO_POINTER(-1);
3625         }
3626
3627         g_slist_free(item->uid_list);
3628         item->uid_list = NULL;
3629
3630         uidlist = NULL;
3631
3632         if (folder->account && folder->account->low_bandwidth) {
3633                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SIMPLE, NULL,
3634                                  &lep_uidlist);
3635         }
3636
3637         if (r == MAILIMAP_NO_ERROR) {
3638                 GSList * fetchuid_list =
3639                         imap_uid_list_from_lep(lep_uidlist);
3640                 mailimap_search_result_free(lep_uidlist);
3641
3642                 uidlist = g_slist_concat(fetchuid_list, uidlist);
3643         } else {
3644                 carray * lep_uidtab;
3645                 r = imap_threaded_fetch_uid(folder, 1,
3646                                     &lep_uidtab);
3647                 if (r == MAILIMAP_NO_ERROR) {
3648                         GSList * fetchuid_list =
3649                                 imap_uid_list_from_lep_tab(lep_uidtab);
3650                         imap_fetch_uid_list_free(lep_uidtab);
3651                         uidlist = g_slist_concat(fetchuid_list, uidlist);
3652                 }
3653         }
3654
3655         if (r != MAILIMAP_NO_ERROR) {
3656                 stuff->done = TRUE;
3657                 return GINT_TO_POINTER(-1);
3658         }
3659
3660         lastuid_old = item->lastuid;
3661
3662         for (elem = uidlist; elem != NULL; elem = g_slist_next(elem)) {
3663                 guint msgnum;
3664
3665                 msgnum = GPOINTER_TO_INT(elem->data);
3666
3667                 *msgnum_list = g_slist_prepend(*msgnum_list, GINT_TO_POINTER(msgnum));
3668                 item->uid_list = g_slist_prepend(item->uid_list, GINT_TO_POINTER(msgnum));
3669                 nummsgs++;
3670         }
3671         g_slist_free(uidlist);
3672         stuff->done = TRUE;
3673         return GINT_TO_POINTER(nummsgs);
3674 }
3675
3676 static gint get_list_of_uids(IMAPSession *session, Folder *folder, IMAPFolderItem *item, GSList **msgnum_list)
3677 {
3678         gint result;
3679         get_list_uid_data *data = g_new0(get_list_uid_data, 1);
3680         data->done = FALSE;
3681         data->folder = folder;
3682         data->item = item;
3683         data->msgnum_list = msgnum_list;
3684         data->session = session;
3685         if (prefs_common.work_offline &&
3686             !inc_offline_should_override(FALSE,
3687                 _("Claws Mail needs network access in order "
3688                   "to access the IMAP server."))) {
3689                 g_free(data);
3690                 return -1;
3691         }
3692
3693         result = GPOINTER_TO_INT(get_list_of_uids_thread(data));
3694         g_free(data);
3695         return result;
3696
3697 }
3698
3699 gint imap_get_num_list(Folder *folder, FolderItem *_item, GSList **msgnum_list, gboolean *old_uids_valid)
3700 {
3701         IMAPFolderItem *item = (IMAPFolderItem *)_item;
3702         IMAPSession *session;
3703         gint nummsgs;
3704         GSList *uidlist = NULL;
3705         gchar *dir;
3706         gboolean selected_folder;
3707         gint known_list_len = 0;
3708         debug_print("get_num_list\n");
3709
3710         g_return_val_if_fail(folder != NULL, -1);
3711         g_return_val_if_fail(item != NULL, -1);
3712         g_return_val_if_fail(item->item.path != NULL, -1);
3713         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
3714         g_return_val_if_fail(folder->account != NULL, -1);
3715
3716         known_list_len = g_slist_length(item->uid_list);
3717         if (!item->should_update) {
3718                 debug_print("get_num_list: nothing to update\n");
3719                 *old_uids_valid = TRUE;
3720                 if (known_list_len == item->item.total_msgs
3721                  && known_list_len > 0) {
3722                         *msgnum_list = g_slist_copy(item->uid_list);
3723                         return known_list_len;
3724                 } else {
3725                         debug_print("don't know the list length...\n");
3726                 }
3727         }
3728
3729         debug_print("getting session...\n");
3730         session = imap_session_get(folder);
3731         g_return_val_if_fail(session != NULL, -1);
3732
3733         if (FOLDER_ITEM(item)->path)
3734                 statusbar_print_all(_("Scanning folder %s%c%s ..."),
3735                                       FOLDER_ITEM(item)->folder->name,
3736                                       G_DIR_SEPARATOR,
3737                                       FOLDER_ITEM(item)->path);
3738         else
3739                 statusbar_print_all(_("Scanning folder %s ..."),
3740                                       FOLDER_ITEM(item)->folder->name);
3741
3742         selected_folder = (session->mbox != NULL) &&
3743                           (!strcmp(session->mbox, item->item.path));
3744
3745         if (item->should_trash_cache) {
3746                 *old_uids_valid = FALSE;
3747                 debug_print("get_num_list: trashing num list\n");
3748                 debug_print("Freeing imap uid cache\n");
3749                 item->lastuid = 0;
3750                 g_slist_free(item->uid_list);
3751                 item->uid_list = NULL;
3752
3753                 imap_delete_all_cached_messages((FolderItem *)item);
3754         } else {
3755                 debug_print("get_num_list: updating num list\n");
3756                 *old_uids_valid = TRUE;
3757         }
3758
3759         nummsgs = get_list_of_uids(session, folder, item, &uidlist);
3760         debug_print("get_num_list: got %d msgs\n", nummsgs);
3761
3762         if (nummsgs < 0) {
3763                 statusbar_pop_all();
3764                 unlock_session(session);
3765                 return -1;
3766         }
3767
3768         *msgnum_list = uidlist;
3769
3770         dir = folder_item_get_path((FolderItem *)item);
3771         debug_print("removing old messages from %s\n", dir);
3772         remove_numbered_files_not_in_list(dir, *msgnum_list);
3773         g_free(dir);
3774
3775         debug_print("get_num_list - ok - %i\n", nummsgs);
3776         statusbar_pop_all();
3777         unlock_session(session);
3778         item->should_trash_cache = FALSE;
3779         item->should_update = FALSE;
3780         return nummsgs;
3781 }
3782
3783 static MsgInfo *imap_parse_msg(const gchar *file, FolderItem *item)
3784 {
3785         MsgInfo *msginfo;
3786         MsgFlags flags;
3787
3788         flags.perm_flags = MSG_NEW|MSG_UNREAD;
3789         flags.tmp_flags = 0;
3790
3791         g_return_val_if_fail(item != NULL, NULL);
3792         g_return_val_if_fail(file != NULL, NULL);
3793
3794         if (folder_has_parent_of_type(item, F_QUEUE)) {
3795                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
3796         } else if (folder_has_parent_of_type(item, F_DRAFT)) {
3797                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
3798         }
3799
3800         msginfo = procheader_parse_file(file, flags, FALSE, FALSE);
3801         if (!msginfo) return NULL;
3802
3803         msginfo->plaintext_file = g_strdup(file);
3804         msginfo->folder = item;
3805
3806         return msginfo;
3807 }
3808
3809 GSList *imap_get_msginfos(Folder *folder, FolderItem *item,
3810                           GSList *msgnum_list)
3811 {
3812         IMAPSession *session;
3813         MsgInfoList *ret = NULL;
3814         gint ok;
3815
3816         debug_print("get_msginfos\n");
3817
3818         g_return_val_if_fail(folder != NULL, NULL);
3819         g_return_val_if_fail(item != NULL, NULL);
3820         g_return_val_if_fail(msgnum_list != NULL, NULL);
3821
3822         debug_print("getting session...\n");
3823         session = imap_session_get(folder);
3824         g_return_val_if_fail(session != NULL, NULL);
3825
3826         debug_print("IMAP getting msginfos\n");
3827         ok = imap_select(session, IMAP_FOLDER(folder), item->path,
3828                          NULL, NULL, NULL, NULL, FALSE);
3829         if (ok != IMAP_SUCCESS) {
3830                 unlock_session(session);
3831                 if (ok == MAILIMAP_ERROR_STREAM) {
3832                         imap_disc_session_destroy(folder);
3833                         session = NULL;
3834                 }
3835                 return NULL;
3836         }
3837         if (!(folder_has_parent_of_type(item, F_DRAFT) ||
3838               folder_has_parent_of_type(item, F_QUEUE))) {
3839                 ret = g_slist_concat(ret,
3840                         imap_get_uncached_messages(session, item,
3841                                                    msgnum_list));
3842         } else {
3843                 MsgNumberList *sorted_list, *elem, *llast = NULL;
3844                 gint startnum, lastnum;
3845
3846                 sorted_list = g_slist_sort(g_slist_copy(msgnum_list), g_int_compare);
3847
3848                 startnum = lastnum = GPOINTER_TO_INT(sorted_list->data);
3849
3850                 llast = g_slist_last(ret);
3851                 for (elem = sorted_list;; elem = g_slist_next(elem)) {
3852                         guint num = 0;
3853
3854                         if (elem)
3855                                 num = GPOINTER_TO_INT(elem->data);
3856
3857                         if (num > lastnum + 1 || elem == NULL) {
3858                                 int i;
3859                                 for (i = startnum; i <= lastnum; ++i) {
3860                                         gchar *file;
3861                                         unlock_session(session);
3862                                         file = imap_fetch_msg(folder, item, i);
3863                                         lock_session(session);
3864                                         if (file != NULL) {
3865                                                 MsgInfo *msginfo = imap_parse_msg(file, item);
3866                                                 if (msginfo != NULL) {
3867                                                         msginfo->msgnum = i;
3868                                                         if (llast == NULL)
3869                                                                 llast = ret = g_slist_append(ret, msginfo);
3870                                                         else {
3871                                                                 llast = g_slist_append(llast, msginfo);
3872                                                                 llast = llast->next;
3873                                                         }
3874                                                 }
3875                                                 g_free(file);
3876                                         }
3877                                         session_set_access_time(SESSION(session));
3878                                 }
3879
3880                                 if (elem == NULL)
3881                                         break;
3882
3883                                 startnum = num;
3884                         }
3885                         lastnum = num;
3886                 }
3887
3888                 g_slist_free(sorted_list);
3889         }
3890         unlock_session(session);
3891         return ret;
3892 }
3893
3894 MsgInfo *imap_get_msginfo(Folder *folder, FolderItem *item, gint uid)
3895 {
3896         MsgInfo *msginfo = NULL;
3897         MsgInfoList *msginfolist;
3898         MsgNumberList numlist;
3899
3900         numlist.next = NULL;
3901         numlist.data = GINT_TO_POINTER(uid);
3902
3903         msginfolist = imap_get_msginfos(folder, item, &numlist);
3904         if (msginfolist != NULL) {
3905                 msginfo = msginfolist->data;
3906                 g_slist_free(msginfolist);
3907         }
3908
3909         return msginfo;
3910 }
3911
3912 gboolean imap_scan_required(Folder *folder, FolderItem *_item)
3913 {
3914         IMAPSession *session;
3915         IMAPFolderItem *item = (IMAPFolderItem *)_item;
3916         gint ok, exists = 0, unseen = 0;
3917         guint32 uid_next = 0, uid_val = 0;
3918         gboolean selected_folder;
3919
3920         g_return_val_if_fail(folder != NULL, FALSE);
3921         g_return_val_if_fail(item != NULL, FALSE);
3922         g_return_val_if_fail(item->item.folder != NULL, FALSE);
3923         g_return_val_if_fail(FOLDER_CLASS(item->item.folder) == &imap_class, FALSE);
3924
3925         if (item->item.path == NULL)
3926                 return FALSE;
3927
3928         if (item->should_update) {
3929                 debug_print("scan already required\n");
3930                 return TRUE;
3931         }
3932         debug_print("getting session...\n");
3933         session = imap_session_get(folder);
3934         g_return_val_if_fail(session != NULL, FALSE);
3935
3936         selected_folder = (session->mbox != NULL) &&
3937                           (!strcmp(session->mbox, item->item.path));
3938         if (selected_folder) {
3939                 if (!session->folder_content_changed) {
3940                         ok = imap_cmd_noop(session);
3941                         if (ok != IMAP_SUCCESS) {
3942                                 debug_print("disconnected!\n");
3943                                 session = imap_reconnect_if_possible(folder, session);
3944                                 if (session == NULL)
3945                                         return FALSE;
3946                         }
3947
3948                         if (session->folder_content_changed) {
3949                                 debug_print("CHANGED (self-noop)! scan_required\n");
3950                                 unlock_session(session);
3951                                 item->should_update = TRUE;
3952                                 if (session->uid_validity && session->uid_validity != item->item.mtime) {
3953                                         item->item.mtime = session->uid_validity;
3954                                         item->should_trash_cache = TRUE;
3955                                 }
3956
3957                                 return TRUE;
3958                         }
3959                 } else {
3960                         debug_print("CHANGED (previous noop)! scan_required\n");
3961                         unlock_session(session);
3962                         item->should_update = TRUE;
3963                         if (session->uid_validity && session->uid_validity != item->item.mtime) {
3964                                 item->item.mtime = session->uid_validity;
3965                                 item->should_trash_cache = TRUE;
3966                         }
3967                         return TRUE;
3968                 }
3969         } else {
3970                 ok = imap_status(session, IMAP_FOLDER(folder), item->item.path, IMAP_FOLDER_ITEM(item),
3971                                  &exists, &uid_next, &uid_val, &unseen, FALSE);
3972                 if (ok != IMAP_SUCCESS) {
3973                         unlock_session(session);
3974                         if (ok == MAILIMAP_ERROR_STREAM) {
3975                                 imap_disc_session_destroy(folder);
3976                                 session = NULL;
3977                         }
3978                         return FALSE;
3979                 }
3980
3981                 debug_print("exists %d, item->item.total_msgs %d\n",
3982                         exists, item->item.total_msgs);
3983                 if (exists != item->item.total_msgs
3984                     || unseen != item->item.unread_msgs
3985                     || uid_next != item->uid_next
3986                     || uid_val != item->item.mtime) {
3987                         unlock_session(session);
3988                         debug_print("CHANGED (status)! scan_required\n");
3989                         item->last_change = time(NULL);
3990                         item->should_update = TRUE;
3991                         item->uid_next = uid_next;
3992                         if (uid_val != item->item.mtime) {
3993                                 item->item.mtime = uid_val;
3994                                 item->should_trash_cache = TRUE;
3995                         }
3996                         return TRUE;
3997                 }
3998         }
3999         item->should_update = FALSE;
4000         unlock_session(session);
4001         return FALSE;
4002 }
4003
4004 void imap_change_flags(Folder *folder, FolderItem *item, MsgInfo *msginfo, MsgPermFlags newflags)
4005 {
4006         IMAPSession *session;
4007         IMAPFlags flags_set = 0, flags_unset = 0;
4008         gint ok = IMAP_SUCCESS;
4009         MsgNumberList numlist;
4010         hashtable_data *ht_data = NULL;
4011
4012         g_return_if_fail(folder != NULL);
4013         g_return_if_fail(folder->klass == &imap_class);
4014         g_return_if_fail(item != NULL);
4015         g_return_if_fail(item->folder == folder);
4016         g_return_if_fail(msginfo != NULL);
4017         g_return_if_fail(msginfo->folder == item);
4018
4019         if (!MSG_IS_MARKED(msginfo->flags) &&  (newflags & MSG_MARKED))
4020                 flags_set |= IMAP_FLAG_FLAGGED;
4021         if ( MSG_IS_MARKED(msginfo->flags) && !(newflags & MSG_MARKED))
4022                 flags_unset |= IMAP_FLAG_FLAGGED;
4023
4024         if (!MSG_IS_UNREAD(msginfo->flags) &&  (newflags & MSG_UNREAD))
4025                 flags_unset |= IMAP_FLAG_SEEN;
4026         if ( MSG_IS_UNREAD(msginfo->flags) && !(newflags & MSG_UNREAD))
4027                 flags_set |= IMAP_FLAG_SEEN;
4028
4029         if (!MSG_IS_REPLIED(msginfo->flags) &&  (newflags & MSG_REPLIED))
4030                 flags_set |= IMAP_FLAG_ANSWERED;
4031         if ( MSG_IS_REPLIED(msginfo->flags) && !(newflags & MSG_REPLIED))
4032                 flags_unset |= IMAP_FLAG_ANSWERED;
4033
4034         if (!MSG_IS_DELETED(msginfo->flags) &&  (newflags & MSG_DELETED))
4035                 flags_set |= IMAP_FLAG_DELETED;
4036         if ( MSG_IS_DELETED(msginfo->flags) && !(newflags & MSG_DELETED))
4037                 flags_unset |= IMAP_FLAG_DELETED;
4038
4039         if (!flags_set && !flags_unset) {
4040                 /* the changed flags were not translatable to IMAP-speak.
4041                  * like MSG_POSTFILTERED, so just apply. */
4042                 msginfo->flags.perm_flags = newflags;
4043                 return;
4044         }
4045
4046         debug_print("getting session...\n");
4047         session = imap_session_get(folder);
4048         if (!session) {
4049                 return;
4050         }
4051
4052         if ((ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder->path,
4053             NULL, NULL, NULL, NULL, FALSE)) != IMAP_SUCCESS) {
4054                 unlock_session(session);
4055                 if (ok == MAILIMAP_ERROR_STREAM) {
4056                         imap_disc_session_destroy(folder);
4057                         session = NULL;
4058                 }
4059                 return;
4060         }
4061         numlist.next = NULL;
4062         numlist.data = GINT_TO_POINTER(msginfo->msgnum);
4063
4064         if (IMAP_FOLDER_ITEM(item)->batching) {
4065                 /* instead of performing an UID STORE command for each message change,
4066                  * as a lot of them can change "together", we just fill in hashtables
4067                  * and defer the treatment so that we're able to send only one
4068                  * command.
4069                  */
4070                 debug_print("IMAP batch mode on, deferring flags change\n");
4071                 if (flags_set) {
4072                         ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->flags_set_table,
4073                                 GINT_TO_POINTER(flags_set));
4074                         if (ht_data == NULL) {
4075                                 ht_data = g_new0(hashtable_data, 1);
4076                                 ht_data->session = session;
4077                                 ht_data->item = IMAP_FOLDER_ITEM(item);
4078                                 g_hash_table_insert(IMAP_FOLDER_ITEM(item)->flags_set_table,
4079                                         GINT_TO_POINTER(flags_set), ht_data);
4080                         }
4081                         ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
4082                 }
4083                 if (flags_unset) {
4084                         ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->flags_unset_table,
4085                                 GINT_TO_POINTER(flags_unset));
4086                         if (ht_data == NULL) {
4087                                 ht_data = g_new0(hashtable_data, 1);
4088                                 ht_data->session = session;
4089                                 ht_data->item = IMAP_FOLDER_ITEM(item);
4090                                 g_hash_table_insert(IMAP_FOLDER_ITEM(item)->flags_unset_table,
4091                                         GINT_TO_POINTER(flags_unset), ht_data);
4092                         }
4093                         ht_data->msglist = g_slist_prepend(ht_data->msglist,
4094                                         GINT_TO_POINTER(msginfo->msgnum));
4095                 }
4096         } else {
4097                 debug_print("IMAP changing flags\n");
4098                 if (flags_set) {
4099                         ok = imap_set_message_flags(session, &numlist, flags_set, TRUE);
4100                         if (ok != IMAP_SUCCESS) {
4101                                 unlock_session(session);
4102                                 if (ok == MAILIMAP_ERROR_STREAM) {
4103                                         imap_disc_session_destroy(folder);
4104                                         session = NULL;
4105                                 }
4106                                 return;
4107                         }
4108                 }
4109
4110                 if (flags_unset) {
4111                         ok = imap_set_message_flags(session, &numlist, flags_unset, FALSE);
4112                         if (ok != IMAP_SUCCESS) {
4113                                 unlock_session(session);
4114                                 if (ok == MAILIMAP_ERROR_STREAM) {
4115                                         imap_disc_session_destroy(folder);
4116                                         session = NULL;
4117                                 }
4118                                 return;
4119                         }
4120                 }
4121         }
4122         msginfo->flags.perm_flags = newflags;
4123         unlock_session(session);
4124         return;
4125 }
4126
4127 static gint imap_remove_msg(Folder *folder, FolderItem *item, gint uid)
4128 {
4129         gint ok;
4130         IMAPSession *session;
4131         gchar *dir;
4132         MsgNumberList numlist;
4133
4134         g_return_val_if_fail(folder != NULL, -1);
4135         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
4136         g_return_val_if_fail(item != NULL, -1);
4137
4138         debug_print("getting session...\n");
4139         session = imap_session_get(folder);
4140         if (!session) return -1;
4141
4142         ok = imap_select(session, IMAP_FOLDER(folder), item->path,
4143                          NULL, NULL, NULL, NULL, FALSE);
4144         if (ok != IMAP_SUCCESS) {
4145                 unlock_session(session);
4146                 if (ok == MAILIMAP_ERROR_STREAM) {
4147                         imap_disc_session_destroy(folder);
4148                         session = NULL;
4149                 }
4150                 return ok;
4151         }
4152         numlist.next = NULL;
4153         numlist.data = GINT_TO_POINTER(uid);
4154
4155         ok = imap_set_message_flags
4156                 (session, &numlist, IMAP_FLAG_DELETED, TRUE);
4157         if (ok != IMAP_SUCCESS) {
4158                 log_warning(LOG_PROTOCOL, _("can't set deleted flags: %d\n"), uid);
4159                 unlock_session(session);
4160                 if (ok == MAILIMAP_ERROR_STREAM) {
4161                         imap_disc_session_destroy(folder);
4162                         session = NULL;
4163                 }
4164                 return ok;
4165         }
4166
4167         if (!session->uidplus) {
4168                 ok = imap_cmd_expunge(session);
4169         } else {
4170                 gchar *uidstr;
4171
4172                 uidstr = g_strdup_printf("%u", uid);
4173                 ok = imap_cmd_expunge(session);
4174                 g_free(uidstr);
4175         }
4176         if (ok != IMAP_SUCCESS) {
4177                 log_warning(LOG_PROTOCOL, _("can't expunge\n"));
4178                 unlock_session(session);
4179                 if (ok == MAILIMAP_ERROR_STREAM) {
4180                         imap_disc_session_destroy(folder);
4181                         session = NULL;
4182                 }
4183                 return ok;
4184         }
4185
4186         IMAP_FOLDER_ITEM(item)->uid_list = g_slist_remove(
4187             IMAP_FOLDER_ITEM(item)->uid_list, numlist.data);
4188         dir = folder_item_get_path(item);
4189         if (is_dir_exist(dir))
4190                 remove_numbered_files(dir, uid, uid);
4191         g_free(dir);
4192         unlock_session(session);
4193         return IMAP_SUCCESS;
4194 }
4195
4196 static gint compare_msginfo(gconstpointer a, gconstpointer b)
4197 {
4198         return ((MsgInfo *)a)->msgnum - ((MsgInfo *)b)->msgnum;
4199 }
4200
4201 static guint gslist_find_next_num(MsgNumberList **list, guint num)
4202 {
4203         GSList *elem;
4204
4205         g_return_val_if_fail(list != NULL, -1);
4206
4207         for (elem = *list; elem != NULL; elem = g_slist_next(elem))
4208                 if (GPOINTER_TO_INT(elem->data) >= num)
4209                         break;
4210         *list = elem;
4211         return elem != NULL ? GPOINTER_TO_INT(elem->data) : (gint)-1;
4212 }
4213
4214 /*
4215  * NEW and DELETED flags are not syncronized
4216  * - The NEW/RECENT flags in IMAP folders can not really be directly
4217  *   modified by Sylpheed
4218  * - The DELETE/DELETED flag in IMAP and Sylpheed don't have the same
4219  *   meaning, in IMAP it always removes the messages from the FolderItem
4220  *   in Sylpheed it can mean to move the message to trash
4221  */
4222
4223 typedef struct _get_flags_data {
4224         Folder *folder;
4225         FolderItem *item;
4226         MsgInfoList *msginfo_list;
4227         GRelation *msgflags;
4228         gboolean full_search;
4229         gboolean done;
4230 } get_flags_data;
4231
4232 static /*gint*/ void *imap_get_flags_thread(void *data)
4233 {
4234         get_flags_data *stuff = (get_flags_data *)data;
4235         Folder *folder = stuff->folder;
4236         FolderItem *fitem = (FolderItem *) stuff->item;
4237         MsgInfoList *msginfo_list = stuff->msginfo_list;
4238         GRelation *msgflags = stuff->msgflags;
4239         GSList *elem;
4240         carray * lep_uidtab;
4241         IMAPSession *session;
4242         gint ok;
4243         int r;
4244         GHashTable *flags_hash = NULL;
4245         gboolean full_search = stuff->full_search;
4246         GSList *sorted_list = NULL;
4247         GSList *unseen = NULL, *answered = NULL, *flagged = NULL, *deleted = NULL;
4248         GSList *p_unseen, *p_answered, *p_flagged, *p_deleted;
4249         GSList *seq_list, *cur;
4250         gboolean reverse_seen = FALSE;
4251         gboolean selected_folder;
4252         gint exists_cnt, unseen_cnt;
4253
4254         session = imap_session_get(folder);
4255         if (session == NULL) {
4256                 stuff->done = TRUE;
4257                 return GINT_TO_POINTER(-1);
4258         }
4259         selected_folder = (session->mbox != NULL) &&
4260                           (!strcmp(session->mbox, fitem->path));
4261
4262         if (!selected_folder) {
4263                 ok = imap_select(session, IMAP_FOLDER(folder), fitem->path,
4264                         &exists_cnt, NULL, &unseen_cnt, NULL, TRUE);
4265                 if (ok != IMAP_SUCCESS) {
4266                         stuff->done = TRUE;
4267                         unlock_session(session);
4268                         if (ok == MAILIMAP_ERROR_STREAM) {
4269                                 imap_disc_session_destroy(folder);
4270                                 session = NULL;
4271                         }
4272                         return GINT_TO_POINTER(-1);
4273                 }
4274
4275                 if (unseen_cnt > exists_cnt / 2)
4276                         reverse_seen = TRUE;
4277         }
4278         else {
4279                 if (fitem->unread_msgs > fitem->total_msgs / 2)
4280                         reverse_seen = TRUE;
4281         }
4282
4283         sorted_list = g_slist_sort(g_slist_copy(msginfo_list), compare_msginfo);
4284         if (!full_search) {
4285                 seq_list = imap_get_lep_set_from_msglist(msginfo_list);
4286         } else {
4287                 struct mailimap_set * set;
4288                 set = mailimap_set_new_interval(1, 0);
4289                 seq_list = g_slist_append(NULL, set);
4290         }
4291
4292         if (folder->account && folder->account->low_bandwidth) {
4293                 for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
4294                         struct mailimap_set * imapset;
4295                         clist * lep_uidlist;
4296                         int r;
4297
4298                         imapset = cur->data;
4299                         if (reverse_seen) {
4300                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SEEN,
4301                                                          full_search ? NULL:imapset, &lep_uidlist);
4302                         }
4303                         else {
4304                                 r = imap_threaded_search(folder,
4305                                                          IMAP_SEARCH_TYPE_UNSEEN,
4306                                                          full_search ? NULL:imapset, &lep_uidlist);
4307                         }
4308                         if (r == MAILIMAP_NO_ERROR) {
4309                                 GSList * uidlist;
4310
4311                                 uidlist = imap_uid_list_from_lep(lep_uidlist);
4312                                 mailimap_search_result_free(lep_uidlist);
4313
4314                                 unseen = g_slist_concat(unseen, uidlist);
4315                         }
4316
4317                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_FLAGGED,
4318                                                  full_search ? NULL:imapset, &lep_uidlist);
4319                         if (r == MAILIMAP_NO_ERROR) {
4320                                 GSList * uidlist;
4321
4322                                 uidlist = imap_uid_list_from_lep(lep_uidlist);
4323                                 mailimap_search_result_free(lep_uidlist);
4324
4325                                 flagged = g_slist_concat(flagged, uidlist);
4326                         }
4327
4328                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
4329                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_ANSWERED,
4330                                                          full_search ? NULL:imapset, &lep_uidlist);
4331                                 if (r == MAILIMAP_NO_ERROR) {
4332                                         GSList * uidlist;
4333
4334                                         uidlist = imap_uid_list_from_lep(lep_uidlist);
4335                                         mailimap_search_result_free(lep_uidlist);
4336
4337                                         answered = g_slist_concat(answered, uidlist);
4338                                 }
4339
4340                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_DELETED,
4341                                                          full_search ? NULL:imapset, &lep_uidlist);
4342                                 if (r == MAILIMAP_NO_ERROR) {
4343                                         GSList * uidlist;
4344
4345                                         uidlist = imap_uid_list_from_lep(lep_uidlist);
4346                                         mailimap_search_result_free(lep_uidlist);
4347
4348                                         deleted = g_slist_concat(deleted, uidlist);
4349                                 }
4350                         }
4351                 }
4352                 p_unseen = unseen;
4353                 p_answered = answered;
4354                 p_flagged = flagged;
4355                 p_deleted = deleted;
4356
4357         } else {
4358                 r = imap_threaded_fetch_uid_flags(folder, 1, &lep_uidtab);
4359                 if (r == MAILIMAP_NO_ERROR) {
4360                         flags_hash = g_hash_table_new_full(g_int_hash, g_int_equal, free, NULL);
4361                         imap_flags_hash_from_lep_uid_flags_tab(lep_uidtab, flags_hash);
4362                         imap_fetch_uid_flags_list_free(lep_uidtab);
4363                 }
4364         }
4365         for (elem = sorted_list; elem != NULL; elem = g_slist_next(elem)) {
4366                 MsgInfo *msginfo;
4367                 MsgPermFlags flags, oldflags;
4368                 gboolean wasnew;
4369
4370                 msginfo = (MsgInfo *) elem->data;
4371                 flags = msginfo->flags.perm_flags;
4372                 wasnew = (flags & MSG_NEW);
4373                 oldflags = flags & ~(MSG_NEW|MSG_UNREAD|MSG_REPLIED|MSG_MARKED|MSG_DELETED);
4374
4375                 if (folder->account && folder->account->low_bandwidth) {
4376                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
4377                                 flags &= ~((reverse_seen ? 0 : MSG_UNREAD | MSG_NEW) | MSG_REPLIED | MSG_MARKED);
4378                         } else {
4379                                 flags &= ~((reverse_seen ? 0 : MSG_UNREAD | MSG_NEW | MSG_MARKED));
4380                         }
4381                         if (reverse_seen)
4382                                 flags |= MSG_UNREAD | (wasnew ? MSG_NEW : 0);
4383                         if (gslist_find_next_num(&p_unseen, msginfo->msgnum) == msginfo->msgnum) {
4384                                 if (!reverse_seen) {
4385                                         flags |= MSG_UNREAD | (wasnew ? MSG_NEW : 0);
4386                                 } else {
4387                                         flags &= ~(MSG_UNREAD | MSG_NEW);
4388                                 }
4389                         }
4390
4391                         if (gslist_find_next_num(&p_flagged, msginfo->msgnum) == msginfo->msgnum)
4392                                 flags |= MSG_MARKED;
4393                         else
4394                                 flags &= ~MSG_MARKED;
4395
4396                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
4397                                 if (gslist_find_next_num(&p_answered, msginfo->msgnum) == msginfo->msgnum)
4398                                         flags |= MSG_REPLIED;
4399                                 else
4400                                         flags &= ~MSG_REPLIED;
4401                                 if (gslist_find_next_num(&p_deleted, msginfo->msgnum) == msginfo->msgnum)
4402                                         flags |= MSG_DELETED;
4403                                 else
4404                                         flags &= ~MSG_DELETED;
4405                         }
4406                 } else {
4407                         if (flags_hash != NULL) {
4408                                 gint * puid;
4409
4410                                 puid = malloc(sizeof(* puid));
4411                                 * puid = msginfo->msgnum;
4412
4413                                 flags = GPOINTER_TO_INT(g_hash_table_lookup(flags_hash, puid));
4414                                 free(puid);
4415                         }
4416
4417                         if ((flags & MSG_UNREAD) == 0)
4418                                 flags &= ~MSG_NEW;
4419                         else if (wasnew)
4420                                 flags |= MSG_NEW;
4421                         flags |= oldflags;
4422                 }
4423
4424                 g_relation_insert(msgflags, msginfo, GINT_TO_POINTER(flags));
4425         }
4426
4427         if (flags_hash)
4428                 g_hash_table_destroy(flags_hash);
4429
4430         imap_lep_set_free(seq_list);
4431         g_slist_free(flagged);
4432         g_slist_free(deleted);
4433         g_slist_free(answered);
4434         g_slist_free(unseen);
4435         g_slist_free(sorted_list);
4436
4437         unlock_session(session);
4438         stuff->done = TRUE;
4439         return GINT_TO_POINTER(0);
4440 }
4441
4442 static gint imap_get_flags(Folder *folder, FolderItem *item,
4443                            MsgInfoList *msginfo_list, GRelation *msgflags)
4444 {
4445         gint result;
4446         get_flags_data *data = g_new0(get_flags_data, 1);
4447         data->done = FALSE;
4448         data->folder = folder;
4449         data->item = item;
4450         data->msginfo_list = msginfo_list;
4451         data->msgflags = msgflags;
4452         data->full_search = FALSE;
4453
4454         GSList *tmp = NULL, *cur;
4455
4456         if (prefs_common.work_offline &&
4457             !inc_offline_should_override(FALSE,
4458                 _("Claws Mail needs network access in order "
4459                   "to access the IMAP server."))) {
4460                 g_free(data);
4461                 return -1;
4462         }
4463
4464         tmp = folder_item_get_msg_list(item);
4465
4466         if (g_slist_length(tmp) <= g_slist_length(msginfo_list))
4467                 data->full_search = TRUE;
4468
4469         for (cur = tmp; cur; cur = cur->next)
4470                 procmsg_msginfo_free((MsgInfo *)cur->data);
4471
4472         g_slist_free(tmp);
4473
4474         result = GPOINTER_TO_INT(imap_get_flags_thread(data));
4475
4476         g_free(data);
4477         return result;
4478
4479 }
4480
4481 static gboolean process_flags(gpointer key, gpointer value, gpointer user_data)
4482 {
4483         gboolean flags_set = GPOINTER_TO_INT(user_data);
4484         gint flags_value = GPOINTER_TO_INT(key);
4485         hashtable_data *data = (hashtable_data *)value;
4486         IMAPFolderItem *_item = data->item;
4487         FolderItem *item = (FolderItem *)_item;
4488         gint ok = IMAP_ERROR;
4489         IMAPSession *session = NULL;
4490
4491         debug_print("getting session...\n");
4492         session = imap_session_get(item->folder);
4493
4494         data->msglist = g_slist_reverse(data->msglist);
4495
4496         debug_print("IMAP %ssetting flags to %d for %d messages\n",
4497                 flags_set?"":"un",
4498                 flags_value,
4499                 g_slist_length(data->msglist));
4500
4501         if (session) {
4502                 ok = imap_select(session, IMAP_FOLDER(item->folder), item->path,
4503                          NULL, NULL, NULL, NULL, FALSE);
4504         }
4505         if (ok == IMAP_SUCCESS) {
4506                 imap_set_message_flags(data->session, data->msglist, flags_value, flags_set);
4507         } else {
4508                 g_warning("can't select mailbox %s\n", item->path);
4509         }
4510
4511         unlock_session(session);
4512         if (ok == MAILIMAP_ERROR_STREAM) {
4513                         imap_disc_session_destroy(item->folder);
4514                         session = NULL;
4515         }
4516         g_slist_free(data->msglist);
4517         g_free(data);
4518         return TRUE;
4519 }
4520
4521 static void process_hashtable(IMAPFolderItem *item)
4522 {
4523         if (item->flags_set_table) {
4524                 g_hash_table_foreach_remove(item->flags_set_table, process_flags, GINT_TO_POINTER(TRUE));
4525                 g_hash_table_destroy(item->flags_set_table);
4526                 item->flags_set_table = NULL;
4527         }
4528         if (item->flags_unset_table) {
4529                 g_hash_table_foreach_remove(item->flags_unset_table, process_flags, GINT_TO_POINTER(FALSE));
4530                 g_hash_table_destroy(item->flags_unset_table);
4531                 item->flags_unset_table = NULL;
4532         }
4533
4534 }
4535
4536 static void imap_set_batch (Folder *folder, FolderItem *_item, gboolean batch)
4537 {
4538         IMAPFolderItem *item = (IMAPFolderItem *)_item;
4539         IMAPSession *session;
4540
4541         g_return_if_fail(item != NULL);
4542
4543         if (item->batching == batch)
4544                 return;
4545
4546         if (batch) {
4547                 item->batching = TRUE;
4548                 debug_print("IMAP switching to batch mode\n");
4549                 if (!item->flags_set_table) {
4550                         item->flags_set_table = g_hash_table_new(NULL, g_direct_equal);
4551                 }
4552                 if (!item->flags_unset_table) {
4553                         item->flags_unset_table = g_hash_table_new(NULL, g_direct_equal);
4554                 }
4555                 session = imap_session_get(folder);
4556                 if (session) {
4557                         imap_refresh_sensitivity(session);
4558                         session->sens_update_block = TRUE;
4559                         unlock_session(session);
4560                 }
4561         } else {
4562                 debug_print("IMAP switching away from batch mode\n");
4563                 /* process stuff */
4564                 process_hashtable(item);
4565                 item->batching = FALSE;
4566                 session = imap_session_get(folder);
4567                 if (session) {
4568                         unlock_session(session);
4569                         session->sens_update_block = FALSE;
4570                         imap_refresh_sensitivity(session);
4571                 }
4572         }
4573 }
4574
4575
4576
4577 /* data types conversion libetpan <-> claws */
4578
4579
4580
4581 #define ETPAN_IMAP_MB_MARKED      1
4582 #define ETPAN_IMAP_MB_UNMARKED    2
4583 #define ETPAN_IMAP_MB_NOSELECT    4
4584 #define ETPAN_IMAP_MB_NOINFERIORS 8
4585
4586 static int imap_flags_to_flags(struct mailimap_mbx_list_flags * imap_flags)
4587 {
4588   int flags;
4589   clistiter * cur;
4590
4591   flags = 0;
4592   if (imap_flags->mbf_type == MAILIMAP_MBX_LIST_FLAGS_SFLAG) {
4593     switch (imap_flags->mbf_sflag) {
4594     case MAILIMAP_MBX_LIST_SFLAG_MARKED:
4595       flags |= ETPAN_IMAP_MB_MARKED;
4596       break;
4597     case MAILIMAP_MBX_LIST_SFLAG_NOSELECT:
4598       flags |= ETPAN_IMAP_MB_NOSELECT;
4599       break;
4600     case MAILIMAP_MBX_LIST_SFLAG_UNMARKED:
4601       flags |= ETPAN_IMAP_MB_UNMARKED;
4602       break;
4603     }
4604   }
4605
4606   for(cur = clist_begin(imap_flags->mbf_oflags) ; cur != NULL ;
4607       cur = clist_next(cur)) {
4608     struct mailimap_mbx_list_oflag * oflag;
4609
4610     oflag = clist_content(cur);
4611
4612     switch (oflag->of_type) {
4613     case MAILIMAP_MBX_LIST_OFLAG_NOINFERIORS:
4614       flags |= ETPAN_IMAP_MB_NOINFERIORS;
4615       break;
4616     }
4617   }
4618
4619   return flags;
4620 }
4621
4622 static GSList * imap_list_from_lep(IMAPFolder * folder,
4623                                    clist * list, const gchar * real_path, gboolean all)
4624 {
4625         clistiter * iter;
4626         GSList * item_list = NULL, *llast = NULL;
4627
4628         for(iter = clist_begin(list) ; iter != NULL ;
4629             iter = clist_next(iter)) {
4630                 struct mailimap_mailbox_list * mb;
4631                 int flags;
4632                 char delimiter;
4633                 char * name;
4634                 char * dup_name;
4635                 gchar * base;
4636                 gchar * loc_name;
4637                 gchar * loc_path;
4638                 FolderItem *new_item;
4639
4640                 mb = clist_content(iter);
4641
4642                 if (mb == NULL)
4643                         continue;
4644
4645                 flags = 0;
4646                 if (mb->mb_flag != NULL)
4647                         flags = imap_flags_to_flags(mb->mb_flag);
4648
4649                 delimiter = mb->mb_delimiter;
4650                 name = mb->mb_name;
4651
4652                 dup_name = strdup(name);
4653                 if (delimiter != '\0')
4654                         subst_char(dup_name, delimiter, '/');
4655
4656                 base = g_path_get_basename(dup_name);
4657                 if (base[0] == '.') {
4658                         g_free(base);
4659                         free(dup_name);
4660                         continue;
4661                 }
4662                 if (!all && path_cmp(name, real_path) == 0) {
4663                         g_free(base);
4664                         free(dup_name);
4665                         continue;
4666                 }
4667
4668                 if (!all && dup_name[strlen(dup_name)-1] == '/') {
4669                         dup_name[strlen(dup_name)-1] = '\0';
4670                 }
4671
4672                 loc_name = imap_modified_utf7_to_utf8(base);
4673                 loc_path = imap_modified_utf7_to_utf8(dup_name);
4674
4675                 new_item = folder_item_new(FOLDER(folder), loc_name, loc_path);
4676                 if ((flags & ETPAN_IMAP_MB_NOINFERIORS) != 0)
4677                         new_item->no_sub = TRUE;
4678                 if (strcmp(dup_name, "INBOX") != 0 &&
4679                     ((flags & ETPAN_IMAP_MB_NOSELECT) != 0))
4680                         new_item->no_select = TRUE;
4681
4682                 if (item_list == NULL)
4683                         llast = item_list = g_slist_append(item_list, new_item);
4684                 else {
4685                         llast = g_slist_append(llast, new_item);
4686                         llast = llast->next;
4687                 }
4688                 debug_print("folder '%s' found.\n", loc_path);
4689                 g_free(base);
4690                 g_free(loc_path);
4691                 g_free(loc_name);
4692
4693                 free(dup_name);
4694         }
4695
4696         return item_list;
4697 }
4698
4699 static GSList * imap_get_lep_set_from_numlist(MsgNumberList *numlist)
4700 {
4701         GSList *sorted_list, *cur;
4702         guint first, last, next;
4703         GSList *ret_list = NULL, *llast = NULL;
4704         unsigned int count;
4705         struct mailimap_set * current_set;
4706         unsigned int item_count;
4707
4708         if (numlist == NULL)
4709                 return NULL;
4710
4711         count = 0;
4712         current_set = mailimap_set_new_empty();
4713
4714         sorted_list = g_slist_copy(numlist);
4715         sorted_list = g_slist_sort(sorted_list, g_int_compare);
4716
4717         first = GPOINTER_TO_INT(sorted_list->data);
4718
4719         item_count = 0;
4720         for (cur = sorted_list; cur != NULL; cur = g_slist_next(cur)) {
4721                 if (GPOINTER_TO_INT(cur->data) == 0)
4722                         continue;
4723
4724                 item_count ++;
4725
4726                 last = GPOINTER_TO_INT(cur->data);
4727                 if (cur->next)
4728                         next = GPOINTER_TO_INT(cur->next->data);
4729                 else
4730                         next = 0;
4731
4732                 if (last + 1 != next || next == 0) {
4733
4734                         struct mailimap_set_item * item;
4735                         item = mailimap_set_item_new(first, last);
4736                         mailimap_set_add(current_set, item);
4737                         count ++;
4738
4739                         first = next;
4740
4741                         if (count >= IMAP_SET_MAX_COUNT) {
4742                                 if (ret_list == NULL)
4743                                         llast = ret_list = g_slist_append(ret_list,
4744                                                           current_set);
4745                                 else {
4746                                         llast = g_slist_append(llast, current_set);
4747                                         llast = llast->next;
4748                                 }
4749                                 current_set = mailimap_set_new_empty();
4750                                 count = 0;
4751                                 item_count = 0;
4752                         }
4753                 }
4754         }
4755
4756         if (clist_count(current_set->set_list) > 0) {
4757                 ret_list = g_slist_append(ret_list,
4758                                           current_set);
4759         }
4760
4761         g_slist_free(sorted_list);
4762
4763         return ret_list;
4764 }
4765
4766 static GSList * imap_get_lep_set_from_msglist(MsgInfoList *msglist)
4767 {
4768         MsgNumberList *numlist = NULL;
4769         MsgInfoList *cur;
4770         GSList *seq_list;
4771
4772         for (cur = msglist; cur != NULL; cur = g_slist_next(cur)) {
4773                 MsgInfo *msginfo = (MsgInfo *) cur->data;
4774
4775                 numlist = g_slist_prepend(numlist, GINT_TO_POINTER(msginfo->msgnum));
4776         }
4777         numlist = g_slist_reverse(numlist);
4778         seq_list = imap_get_lep_set_from_numlist(numlist);
4779         g_slist_free(numlist);
4780
4781         return seq_list;
4782 }
4783
4784 static GSList * imap_uid_list_from_lep(clist * list)
4785 {
4786         clistiter * iter;
4787         GSList * result;
4788
4789         result = NULL;
4790
4791         for(iter = clist_begin(list) ; iter != NULL ;
4792             iter = clist_next(iter)) {
4793                 uint32_t * puid;
4794
4795                 puid = clist_content(iter);
4796                 result = g_slist_prepend(result, GINT_TO_POINTER(* puid));
4797         }
4798
4799         result = g_slist_reverse(result);
4800         return result;
4801 }
4802
4803 static GSList * imap_uid_list_from_lep_tab(carray * list)
4804 {
4805         unsigned int i;
4806         GSList * result;
4807
4808         result = NULL;
4809
4810         for(i = 0 ; i < carray_count(list) ; i ++) {
4811                 uint32_t * puid;
4812
4813                 puid = carray_get(list, i);
4814                 result = g_slist_prepend(result, GINT_TO_POINTER(* puid));
4815         }
4816         result = g_slist_reverse(result);
4817         return result;
4818 }
4819
4820 static void imap_flags_hash_from_lep_uid_flags_tab(carray * list,
4821                                                    GHashTable * hash)
4822 {
4823         unsigned int i;
4824         GSList * result;
4825
4826         result = NULL;
4827
4828         for(i = 0 ; i < carray_count(list) ; i += 2) {
4829                 uint32_t * puid;
4830                 int * pflags;
4831                 gint * pguid;
4832
4833                 puid = carray_get(list, i);
4834                 pflags = carray_get(list, i + 1);
4835                 pguid = malloc(sizeof(* pguid));
4836                 * pguid = * puid;
4837
4838                 g_hash_table_insert(hash, pguid, GINT_TO_POINTER(* pflags));
4839         }
4840 }
4841
4842 static MsgInfo *imap_envelope_from_lep(struct imap_fetch_env_info * info,
4843                                        FolderItem *item)
4844 {
4845         MsgInfo *msginfo = NULL;
4846         guint32 uid = 0;
4847         size_t size = 0;
4848         MsgFlags flags = {0, 0};
4849
4850         if (info->headers == NULL)
4851                 return NULL;
4852
4853         MSG_SET_TMP_FLAGS(flags, MSG_IMAP);
4854         if (folder_has_parent_of_type(item, F_QUEUE)) {
4855                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
4856         } else if (folder_has_parent_of_type(item, F_DRAFT)) {
4857                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
4858         }
4859         flags.perm_flags = info->flags;
4860
4861         uid = info->uid;
4862         size = info->size;
4863         msginfo = procheader_parse_str(info->headers, flags, FALSE, FALSE);
4864
4865         if (msginfo) {
4866                 msginfo->msgnum = uid;
4867                 msginfo->size = size;
4868         }
4869
4870         return msginfo;
4871 }
4872
4873 static void imap_lep_set_free(GSList *seq_list)
4874 {
4875         GSList * cur;
4876
4877         for(cur = seq_list ; cur != NULL ; cur = g_slist_next(cur)) {
4878                 struct mailimap_set * imapset;
4879
4880                 imapset = cur->data;
4881                 mailimap_set_free(imapset);
4882         }
4883         g_slist_free(seq_list);
4884 }
4885
4886 static struct mailimap_flag_list * imap_flag_to_lep(IMAPFlags flags)
4887 {
4888         struct mailimap_flag_list * flag_list;
4889
4890         flag_list = mailimap_flag_list_new_empty();
4891
4892         if (IMAP_IS_SEEN(flags))
4893                 mailimap_flag_list_add(flag_list,
4894                                        mailimap_flag_new_seen());
4895         if (IMAP_IS_ANSWERED(flags))
4896                 mailimap_flag_list_add(flag_list,
4897                                        mailimap_flag_new_answered());
4898         if (IMAP_IS_FLAGGED(flags))
4899                 mailimap_flag_list_add(flag_list,
4900                                        mailimap_flag_new_flagged());
4901         if (IMAP_IS_DELETED(flags))
4902                 mailimap_flag_list_add(flag_list,
4903                                        mailimap_flag_new_deleted());
4904         if (IMAP_IS_DRAFT(flags))
4905                 mailimap_flag_list_add(flag_list,
4906                                        mailimap_flag_new_draft());
4907
4908         return flag_list;
4909 }
4910
4911 guint imap_folder_get_refcnt(Folder *folder)
4912 {
4913         return ((IMAPFolder *)folder)->refcnt;
4914 }
4915
4916 void imap_folder_ref(Folder *folder)
4917 {
4918         ((IMAPFolder *)folder)->refcnt++;
4919 }
4920
4921 void imap_disconnect_all(void)
4922 {
4923         GList *list;
4924         for (list = account_get_list(); list != NULL; list = list->next) {
4925                 PrefsAccount *account = list->data;
4926                 if (account->protocol == A_IMAP4) {
4927                         RemoteFolder *folder = (RemoteFolder *)account->folder;
4928                         if (folder && folder->session) {
4929                                 IMAPSession *session = (IMAPSession *)folder->session;
4930                                 imap_threaded_disconnect(FOLDER(folder));
4931                                 SESSION(session)->state = SESSION_DISCONNECTED;
4932                                 session_destroy(SESSION(session));
4933                                 folder->session = NULL;
4934                         }
4935                 }
4936         }
4937 }
4938
4939 void imap_folder_unref(Folder *folder)
4940 {
4941         if (((IMAPFolder *)folder)->refcnt > 0)
4942                 ((IMAPFolder *)folder)->refcnt--;
4943 }
4944
4945 void imap_cancel_all(void)
4946 {
4947         GList *folderlist;
4948         GList *cur;
4949
4950         folderlist = folder_get_list();
4951         for (cur = folderlist; cur != NULL; cur = g_list_next(cur)) {
4952                 Folder *folder = (Folder *) cur->data;
4953
4954                 if (folder->klass == &imap_class) {
4955                         if (imap_is_busy(folder)) {
4956                                 IMAPSession *imap_session;
4957                                 RemoteFolder *rfolder;
4958
4959                                 g_printerr("cancelled\n");
4960                                 imap_threaded_cancel(folder);
4961                                 rfolder = (RemoteFolder *) folder;
4962                                 imap_session = (IMAPSession *) rfolder->session;
4963                                 if (imap_session)
4964                                         imap_session->cancelled = 1;
4965                         }
4966                 }
4967         }
4968 }
4969
4970 gboolean imap_cancel_all_enabled(void)
4971 {
4972         GList *folderlist;
4973         GList *cur;
4974
4975         folderlist = folder_get_list();
4976         for (cur = folderlist; cur != NULL; cur = g_list_next(cur)) {
4977                 Folder *folder = (Folder *) cur->data;
4978
4979                 if (folder->klass == &imap_class) {
4980                         if (imap_is_busy(folder)) {
4981                                 return TRUE;
4982                         }
4983                 }
4984         }
4985
4986         return FALSE;
4987 }
4988
4989 static gboolean imap_is_busy(Folder *folder)
4990 {
4991         IMAPSession *imap_session;
4992         RemoteFolder *rfolder;
4993
4994         rfolder = (RemoteFolder *) folder;
4995         imap_session = (IMAPSession *) rfolder->session;
4996         if (imap_session == NULL)
4997                 return FALSE;
4998
4999         return imap_session->busy;
5000 }
5001
5002 #else /* HAVE_LIBETPAN */
5003
5004 static FolderClass imap_class;
5005
5006 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item);
5007 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag);
5008
5009 static Folder   *imap_folder_new        (const gchar    *name,
5010                                          const gchar    *path)
5011 {
5012         static gboolean missing_imap_warning = TRUE;
5013         if (missing_imap_warning) {
5014                 missing_imap_warning = FALSE;
5015                 alertpanel_error(
5016                         _("You have one or more IMAP accounts "
5017                           "defined. However this version of "
5018                           "Claws Mail has been built without "
5019                           "IMAP support; your IMAP account(s) are "
5020                           "disabled.\n\n"
5021                           "You probably need to "
5022                           "install libetpan and recompile "
5023                           "Claws Mail."));
5024         }
5025         return NULL;
5026 }
5027 static gint     imap_create_tree        (Folder         *folder)
5028 {
5029         return -1;
5030 }
5031 static FolderItem *imap_create_folder   (Folder         *folder,
5032                                          FolderItem     *parent,
5033                                          const gchar    *name)
5034 {
5035         return NULL;
5036 }
5037 static gint     imap_rename_folder      (Folder         *folder,
5038                                          FolderItem     *item,
5039                                          const gchar    *name)
5040 {
5041         return -1;
5042 }
5043
5044 gchar imap_get_path_separator_for_item(FolderItem *item)
5045 {
5046         return '/';
5047 }
5048
5049 FolderClass *imap_get_class(void)
5050 {
5051         if (imap_class.idstr == NULL) {
5052                 imap_class.type = F_IMAP;
5053                 imap_class.idstr = "imap";
5054                 imap_class.uistr = "IMAP4";
5055
5056                 imap_class.new_folder = imap_folder_new;
5057                 imap_class.create_tree = imap_create_tree;
5058                 imap_class.create_folder = imap_create_folder;
5059                 imap_class.rename_folder = imap_rename_folder;
5060
5061                 imap_class.set_xml = folder_set_xml;
5062                 imap_class.get_xml = folder_get_xml;
5063                 imap_class.item_set_xml = imap_item_set_xml;
5064                 imap_class.item_get_xml = imap_item_get_xml;
5065                 /* nothing implemented */
5066         }
5067
5068         return &imap_class;
5069 }
5070
5071 void imap_disconnect_all(void)
5072 {
5073 }
5074
5075 gint imap_subscribe(Folder *folder, FolderItem *item, gchar *rpath, gboolean sub)
5076 {
5077         return -1;
5078 }
5079
5080 GList * imap_scan_subtree(Folder *folder, FolderItem *item, gboolean unsubs_only, gboolean recursive)
5081 {
5082         return NULL;
5083 }
5084
5085 void imap_cache_msg(FolderItem *item, gint msgnum)
5086 {
5087 }
5088
5089 void imap_cancel_all(void)
5090 {
5091 }
5092
5093 gboolean imap_cancel_all_enabled(void)
5094 {
5095         return FALSE;
5096 }
5097
5098 #endif
5099
5100 #ifdef HAVE_LIBETPAN
5101 static void imap_synchronise(FolderItem *item, gint days)
5102 {
5103         if (IMAP_FOLDER_ITEM(item)->last_sync == IMAP_FOLDER_ITEM(item)->last_change) {
5104                 debug_print("%s already synced\n", item->path?item->path:item->name);
5105                 return;
5106         }
5107         debug_print("syncing %s\n", item->path?item->path:item->name);
5108         imap_gtk_synchronise(item, days);
5109         IMAP_FOLDER_ITEM(item)->last_sync = IMAP_FOLDER_ITEM(item)->last_change;
5110 }
5111 #endif
5112
5113 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag)
5114 {
5115 #ifdef HAVE_LIBETPAN
5116         GList *cur;
5117 #endif
5118         folder_item_set_xml(folder, item, tag);
5119
5120 #ifdef HAVE_LIBETPAN
5121         for (cur = tag->attr; cur != NULL; cur = g_list_next(cur)) {
5122                 XMLAttr *attr = (XMLAttr *) cur->data;
5123
5124                 if (!attr || !attr->name || !attr->value) continue;
5125                 if (!strcmp(attr->name, "uidnext"))
5126                         IMAP_FOLDER_ITEM(item)->uid_next = atoi(attr->value);
5127                 if (!strcmp(attr->name, "last_sync"))
5128                         IMAP_FOLDER_ITEM(item)->last_sync = atoi(attr->value);
5129                 if (!strcmp(attr->name, "last_change"))
5130                         IMAP_FOLDER_ITEM(item)->last_change = atoi(attr->value);
5131         }
5132         if (IMAP_FOLDER_ITEM(item)->last_change == 0)
5133                 IMAP_FOLDER_ITEM(item)->last_change = time(NULL);
5134 #endif
5135 }
5136
5137 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item)
5138 {
5139         XMLTag *tag;
5140
5141         tag = folder_item_get_xml(folder, item);
5142
5143 #ifdef HAVE_LIBETPAN
5144         xml_tag_add_attr(tag, xml_attr_new_int("uidnext",
5145                         IMAP_FOLDER_ITEM(item)->uid_next));
5146         xml_tag_add_attr(tag, xml_attr_new_int("last_sync",
5147                         IMAP_FOLDER_ITEM(item)->last_sync));
5148         xml_tag_add_attr(tag, xml_attr_new_int("last_change",
5149                         IMAP_FOLDER_ITEM(item)->last_change));
5150
5151 #endif
5152         return tag;
5153 }