src/imap.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2003 Hiroyuki Yamamoto
   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 2 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, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  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 <stdio.h>
  28 #include <string.h>
  29 #include <stdlib.h>
  30 #include <dirent.h>
  31 #include <unistd.h>
  32 #include <ctype.h>
  33 #include <time.h>
  34 #if HAVE_ICONV
  35 #  include <iconv.h>
  36 #endif
  37
  38 #include "intl.h"
  39 #include "imap.h"
  40 #include "socket.h"
  41 #include "ssl.h"
  42 #include "recv.h"
  43 #include "procmsg.h"
  44 #include "procheader.h"
  45 #include "folder.h"
  46 #include "prefs_account.h"
  47 #include "codeconv.h"
  48 #include "utils.h"
  49 #include "inputdialog.h"
  50 #include "log.h"
  51
  52 #define IMAP4_PORT      143
  53 #if USE_OPENSSL
  54 #define IMAPS_PORT      993
  55 #endif
  56
  57 #define QUOTE_IF_REQUIRED(out, str)                             \
  58 {                                                               \
  59         if (*str != '"' && strpbrk(str, " \t(){}%*") != NULL) { \
  60                 gchar *__tmp;                                   \
  61                 gint len;                                       \
  62                                                                 \
  63                 len = strlen(str) + 3;                          \
  64                 Xalloca(__tmp, len, return IMAP_ERROR);         \
  65                 g_snprintf(__tmp, len, "\"%s\"", str);          \
  66                 out = __tmp;                                    \
  67         } else {                                                \
  68                 Xstrdup_a(out, str, return IMAP_ERROR);         \
  69         }                                                       \
  70 }
  71
  72 struct _IMAPFolderItem
  73 {
  74         FolderItem item;
  75
  76         guint lastuid;
  77         GSList *uid_list;
  78 };
  79
  80 static GList *session_list = NULL;
  81
  82 static gint imap_cmd_count = 0;
  83
  84 static void imap_folder_init            (Folder         *folder,
  85                                          const gchar    *name,
  86                                          const gchar    *path);
  87
  88 static FolderItem *imap_folder_item_new (Folder         *folder);
  89 static void imap_folder_item_destroy    (Folder         *folder,
  90                                          FolderItem     *item);
  91
  92 static IMAPSession *imap_session_get    (Folder         *folder);
  93
  94 static gint imap_scan_tree_recursive    (IMAPSession    *session,
  95                                          FolderItem     *item);
  96 static GSList *imap_parse_list          (Folder         *folder,
  97                                          IMAPSession    *session,
  98                                          const gchar    *real_path,
  99                                          gchar          *separator);
 100
 101 static void imap_create_missing_folders (Folder                 *folder);
 102 static FolderItem *imap_create_special_folder
 103                                         (Folder                 *folder,
 104                                          SpecialFolderItemType   stype,
 105                                          const gchar            *name);
 106
 107 static gint imap_do_copy                (Folder         *folder,
 108                                          FolderItem     *dest,
 109                                          MsgInfo        *msginfo,
 110                                          gboolean        remove_source);
 111 #if 0
 112 static gint imap_do_copy_msgs_with_dest (Folder         *folder,
 113                                          FolderItem     *dest,
 114                                          GSList         *msglist,
 115                                          gboolean        remove_source);
 116 #endif
 117
 118 static GSList *imap_get_uncached_messages       (IMAPSession    *session,
 119                                                  FolderItem     *item,
 120                                                  guint32         first_uid,
 121                                                  guint32         last_uid);
 122 static void imap_delete_all_cached_messages     (FolderItem     *item);
 123
 124 #if USE_OPENSSL
 125 static SockInfo *imap_open              (const gchar    *server,
 126                                          gushort         port,
 127                                          SSLType         ssl_type);
 128 #else
 129 static SockInfo *imap_open              (const gchar    *server,
 130                                          gushort         port);
 131 #endif
 132
 133 #if USE_OPENSSL
 134 static SockInfo *imap_open_tunnel(const gchar *server,
 135                                   const gchar *tunnelcmd,
 136                                   SSLType ssl_type);
 137 #else
 138 static SockInfo *imap_open_tunnel(const gchar *server,
 139                                   const gchar *tunnelcmd);
 140 #endif
 141
 142 #if USE_OPENSSL
 143 static SockInfo *imap_init_sock(SockInfo *sock, SSLType  ssl_type);
 144 #else
 145 static SockInfo *imap_init_sock(SockInfo *sock);
 146 #endif
 147
 148 static gint imap_set_message_flags      (IMAPSession    *session,
 149                                          guint32         first_uid,
 150                                          guint32         last_uid,
 151                                          IMAPFlags       flag,
 152                                          gboolean        is_set);
 153 static gint imap_select                 (IMAPSession    *session,
 154                                          IMAPFolder     *folder,
 155                                          const gchar    *path,
 156                                          gint           *exists,
 157                                          gint           *recent,
 158                                          gint           *unseen,
 159                                          guint32        *uid_validity);
 160 static gint imap_status                 (IMAPSession    *session,
 161                                          IMAPFolder     *folder,
 162                                          const gchar    *path,
 163                                          gint           *messages,
 164                                          gint           *recent,
 165                                          guint32        *uid_next,
 166                                          guint32        *uid_validity,
 167                                          gint           *unseen);
 168
 169 static void imap_parse_namespace                (IMAPSession    *session,
 170                                                  IMAPFolder     *folder);
 171 static void imap_get_namespace_by_list          (IMAPSession    *session,
 172                                                  IMAPFolder     *folder);
 173 static IMAPNameSpace *imap_find_namespace       (IMAPFolder     *folder,
 174                                                  const gchar    *path);
 175 static gchar imap_get_path_separator            (IMAPFolder     *folder,
 176                                                  const gchar    *path);
 177 static gchar *imap_get_real_path                (IMAPFolder     *folder,
 178                                                  const gchar    *path);
 179
 180 static gchar *imap_parse_atom           (SockInfo       *sock,
 181                                          gchar          *src,
 182                                          gchar          *dest,
 183                                          gint            dest_len,
 184                                          GString        *str);
 185 static MsgFlags imap_parse_flags        (const gchar    *flag_str);
 186 static MsgInfo *imap_parse_envelope     (SockInfo       *sock,
 187                                          FolderItem     *item,
 188                                          GString        *line_str);
 189 static gint imap_greeting               (SockInfo       *sock,
 190                                          gboolean       *is_preauth);
 191 static void imap_get_capability         (Session        *session);
 192 static gboolean imap_has_capability     (IMAPSession    *session,
 193                                          const gchar    *cap);
 194
 195 /* low-level IMAP4rev1 commands */
 196 static gint imap_cmd_login      (SockInfo       *sock,
 197                                  const gchar    *user,
 198                                  const gchar    *pass);
 199 static gint imap_cmd_logout     (SockInfo       *sock);
 200 static gint imap_cmd_noop       (SockInfo       *sock);
 201 static gint imap_cmd_starttls   (SockInfo       *sock);
 202 static gint imap_cmd_namespace  (SockInfo       *sock,
 203                                  gchar         **ns_str);
 204 static gint imap_cmd_list       (SockInfo       *sock,
 205                                  const gchar    *ref,
 206                                  const gchar    *mailbox,
 207                                  GPtrArray      *argbuf);
 208 static gint imap_cmd_do_select  (SockInfo       *sock,
 209                                  const gchar    *folder,
 210                                  gboolean        examine,
 211                                  gint           *exists,
 212                                  gint           *recent,
 213                                  gint           *unseen,
 214                                  guint32        *uid_validity);
 215 static gint imap_cmd_select     (SockInfo       *sock,
 216                                  const gchar    *folder,
 217                                  gint           *exists,
 218                                  gint           *recent,
 219                                  gint           *unseen,
 220                                  guint32        *uid_validity);
 221 static gint imap_cmd_examine    (SockInfo       *sock,
 222                                  const gchar    *folder,
 223                                  gint           *exists,
 224                                  gint           *recent,
 225                                  gint           *unseen,
 226                                  guint32        *uid_validity);
 227 static gint imap_cmd_create     (SockInfo       *sock,
 228                                  const gchar    *folder);
 229 static gint imap_cmd_rename     (SockInfo       *sock,
 230                                  const gchar    *oldfolder,
 231                                  const gchar    *newfolder);
 232 static gint imap_cmd_delete     (SockInfo       *sock,
 233                                  const gchar    *folder);
 234 static gint imap_cmd_envelope   (SockInfo       *sock,
 235                                  guint32         first_uid,
 236                                  guint32         last_uid);
 237 #if 0
 238 static gint imap_cmd_search     (SockInfo       *sock,
 239                                  GSList         *numlist);
 240 #endif
 241 static gint imap_cmd_fetch      (SockInfo       *sock,
 242                                  guint32         uid,
 243                                  const gchar    *filename);
 244 static gint imap_cmd_append     (SockInfo       *sock,
 245                                  const gchar    *destfolder,
 246                                  const gchar    *file);
 247 static gint imap_cmd_copy       (IMAPSession    *session,
 248                                  gint32         msgnum,
 249                                  const gchar    *destfolder,
 250                                  gint32         *new_uid);
 251 static gint imap_cmd_store      (SockInfo       *sock,
 252                                  guint32         first_uid,
 253                                  guint32         last_uid,
 254                                  gchar          *sub_cmd);
 255 static gint imap_cmd_expunge    (SockInfo       *sock);
 256
 257 static gint imap_cmd_ok         (SockInfo       *sock,
 258                                  GPtrArray      *argbuf);
 259 static void imap_cmd_gen_send   (SockInfo       *sock,
 260                                  const gchar    *format, ...);
 261 static gint imap_cmd_gen_recv   (SockInfo       *sock,
 262                                  gchar         **buf);
 263
 264 /* misc utility functions */
 265 static gchar *strchr_cpy                        (const gchar    *src,
 266                                                  gchar           ch,
 267                                                  gchar          *dest,
 268                                                  gint            len);
 269 static gchar *get_quoted                        (const gchar    *src,
 270                                                  gchar           ch,
 271                                                  gchar          *dest,
 272                                                  gint            len);
 273 static gchar *search_array_contain_str          (GPtrArray      *array,
 274                                                  const gchar    *str);
 275 static gchar *search_array_str                  (GPtrArray      *array,
 276                                                  const gchar    *str);
 277 static void imap_path_separator_subst           (gchar          *str,
 278                                                  gchar           separator);
 279
 280 static gchar *imap_modified_utf7_to_locale      (const gchar    *mutf7_str);
 281 static gchar *imap_locale_to_modified_utf7      (const gchar    *from);
 282
 283 static gboolean imap_rename_folder_func         (GNode          *node,
 284                                                  gpointer        data);
 285 gint imap_get_num_list                          (Folder         *folder,
 286                                                  FolderItem     *item,
 287                                                  GSList        **list);
 288 GSList *imap_get_msginfos                       (Folder         *folder,
 289                                                  FolderItem     *item,
 290                                                  GSList         *msgnum_list);
 291 MsgInfo *imap_get_msginfo                       (Folder         *folder,
 292                                                  FolderItem     *item,
 293                                                  gint            num);
 294 gboolean imap_check_msgnum_validity             (Folder         *folder,
 295                                                  FolderItem     *item);
 296
 297 FolderClass imap_class =
 298 {
 299         F_IMAP,
 300         "imap",
 301
 302         imap_folder_item_new,
 303         imap_folder_item_destroy,
 304         imap_fetch_msg,
 305         imap_get_msginfo,
 306         imap_get_msginfos,
 307         imap_add_msg,
 308         imap_move_msg,
 309         NULL,
 310         imap_copy_msg,
 311         NULL,
 312         imap_remove_msg,
 313         imap_remove_msgs,
 314         imap_remove_all_msg,
 315         imap_is_msg_changed,
 316         NULL,
 317         imap_get_num_list,
 318         imap_scan_tree,
 319         imap_create_tree,
 320         imap_create_folder,
 321         imap_rename_folder,
 322         imap_remove_folder,
 323         imap_folder_destroy,
 324         NULL,
 325         NULL,
 326         NULL,
 327         NULL,
 328         imap_check_msgnum_validity,
 329 };
 330
 331 Folder *imap_folder_new(const gchar *name, const gchar *path)
 332 {
 333         Folder *folder;
 334
 335         folder = (Folder *)g_new0(IMAPFolder, 1);
 336         folder->class = &imap_class;
 337         imap_folder_init(folder, name, path);
 338
 339         return folder;
 340 }
 341
 342 void imap_folder_destroy(Folder *folder)
 343 {
 344         gchar *dir;
 345
 346         dir = folder_get_path(folder);
 347         if (is_dir_exist(dir))
 348                 remove_dir_recursive(dir);
 349         g_free(dir);
 350
 351         folder_remote_folder_destroy(REMOTE_FOLDER(folder));
 352 }
 353
 354 static void imap_folder_init(Folder *folder, const gchar *name,
 355                              const gchar *path)
 356 {
 357         folder_remote_folder_init((Folder *)folder, name, path);
 358 }
 359
 360 static FolderItem *imap_folder_item_new(Folder *folder)
 361 {
 362         IMAPFolderItem *item;
 363
 364         item = g_new0(IMAPFolderItem, 1);
 365         item->lastuid = 0;
 366         item->uid_list = NULL;
 367
 368         return (FolderItem *)item;
 369 }
 370
 371 static void imap_folder_item_destroy(Folder *folder, FolderItem *_item)
 372 {
 373         IMAPFolderItem *item = (IMAPFolderItem *)_item;
 374
 375         g_return_if_fail(item != NULL);
 376         g_slist_free(item->uid_list);
 377
 378         g_free(_item);
 379 }
 380
 381 static gboolean imap_reset_uid_lists_func(GNode *node, gpointer data)
 382 {
 383         IMAPFolderItem *item = (IMAPFolderItem *)node->data;
 384
 385         item->lastuid = 0;
 386         g_slist_free(item->uid_list);
 387         item->uid_list = NULL;
 388
 389         return FALSE;
 390 }
 391
 392 static void imap_reset_uid_lists(Folder *folder)
 393 {
 394         if(folder->node == NULL)
 395                 return;
 396
 397         /* Destroy all uid lists and rest last uid */
 398         g_node_traverse(folder->node, G_IN_ORDER, G_TRAVERSE_ALL, -1, imap_reset_uid_lists_func, NULL);
 399 }
 400
 401 static IMAPSession *imap_session_get(Folder *folder)
 402 {
 403         RemoteFolder *rfolder = REMOTE_FOLDER(folder);
 404         Session *session = NULL;
 405         gushort port;
 406
 407         g_return_val_if_fail(folder != NULL, NULL);
 408         g_return_val_if_fail(FOLDER_TYPE(folder) == F_IMAP, NULL);
 409         g_return_val_if_fail(folder->account != NULL, NULL);
 410
 411 #if USE_OPENSSL
 412         port = folder->account->set_imapport ? folder->account->imapport
 413                 : folder->account->ssl_imap == SSL_TUNNEL
 414                 ? IMAPS_PORT : IMAP4_PORT;
 415 #else
 416         port = folder->account->set_imapport ? folder->account->imapport
 417                 : IMAP4_PORT;
 418 #endif
 419
 420         /* Make sure we have a session */
 421         if (rfolder->session != NULL) {
 422                 session = rfolder->session;
 423         } else {
 424                 imap_reset_uid_lists(folder);
 425                 session = imap_session_new(folder->account);
 426         }
 427         if(session == NULL)
 428                 return NULL;
 429
 430         /* Get CAPABILITY */
 431         imap_get_capability(session);
 432
 433         /* Make sure session is authenticated */
 434         if (!IMAP_SESSION(session)->authenticated)
 435                 imap_session_authenticate(IMAP_SESSION(session), folder->account);
 436         if (!IMAP_SESSION(session)->authenticated) {
 437                 session_destroy(session);
 438                 rfolder->session = NULL;
 439                 return NULL;
 440         }
 441
 442         /* Make sure we have parsed the IMAP namespace */
 443         imap_parse_namespace(IMAP_SESSION(session),
 444                              IMAP_FOLDER(folder));
 445
 446         /* I think the point of this code is to avoid sending a
 447          * keepalive if we've used the session recently and therefore
 448          * think it's still alive.  Unfortunately, most of the code
 449          * does not yet check for errors on the socket, and so if the
 450          * connection drops we don't notice until the timeout expires.
 451          * A better solution than sending a NOOP every time would be
 452          * for every command to be prepared to retry until it is
 453          * successfully sent. -- mbp */
 454         if (time(NULL) - session->last_access_time > SESSION_TIMEOUT) {
 455                 /* verify that the session is still alive */
 456                 if (imap_cmd_noop(session->sock) != IMAP_SUCCESS) {
 457                         /* Check if this is the first try to establish a
 458                            connection, if yes we don't try to reconnect */
 459                         if (rfolder->session == NULL) {
 460                                 log_warning(_("Connecting %s:%d failed"),
 461                                             folder->account->recv_server, port);
 462                                 session_destroy(session);
 463                                 session = NULL;
 464                         } else {
 465                                 log_warning(_("IMAP4 connection to %s:%d has been"
 466                                               " disconnected. Reconnecting...\n"),
 467                                             folder->account->recv_server, port);
 468                                 session_destroy(session);
 469                                 /* Clear folders session to make imap_session_get create
 470                                    a new session, because of rfolder->session == NULL
 471                                    it will not try to reconnect again and so avoid an
 472                                    endless loop */
 473                                 rfolder->session = NULL;
 474                                 session = SESSION(imap_session_get(folder));
 475                         }
 476                 }
 477         }
 478
 479         rfolder->session = session;
 480         if (session) {
 481                 session->last_access_time = time(NULL);
 482         }
 483         return IMAP_SESSION(session);
 484 }
 485
 486 Session *imap_session_new(const PrefsAccount *account)
 487 {
 488         IMAPSession *session;
 489         SockInfo *imap_sock;
 490         gushort port;
 491         gboolean is_preauth;
 492
 493 #ifdef USE_OPENSSL
 494         /* FIXME: IMAP over SSL only... */
 495         SSLType ssl_type;
 496
 497         port = account->set_imapport ? account->imapport
 498                 : account->ssl_imap == SSL_TUNNEL ? IMAPS_PORT : IMAP4_PORT;
 499         ssl_type = account->ssl_imap;
 500 #else
 501         port = account->set_imapport ? account->imapport
 502                 : IMAP4_PORT;
 503 #endif
 504
 505         if (account->set_tunnelcmd) {
 506                 log_message(_("creating tunneled IMAP4 connection\n"));
 507 #if USE_OPENSSL
 508                 if ((imap_sock = imap_open_tunnel(account->recv_server,
 509                                                   account->tunnelcmd,
 510                                                   ssl_type)) == NULL)
 511 #else
 512                 if ((imap_sock = imap_open_tunnel(account->recv_server,
 513                                                   account->tunnelcmd)) == NULL)
 514 #endif
 515                         return NULL;
 516         } else {
 517                 g_return_val_if_fail(account->recv_server != NULL, NULL);
 518
 519                 log_message(_("creating IMAP4 connection to %s:%d ...\n"),
 520                             account->recv_server, port);
 521
 522 #if USE_OPENSSL
 523                 if ((imap_sock = imap_open(account->recv_server, port,
 524                                            ssl_type)) == NULL)
 525 #else
 526                 if ((imap_sock = imap_open(account->recv_server, port)) == NULL)
 527 #endif
 528                         return NULL;
 529         }
 530
 531         /* Only need to log in if the connection was not PREAUTH */
 532         if (imap_greeting(imap_sock, &is_preauth) != IMAP_SUCCESS) {
 533                 sock_close(imap_sock);
 534                 return NULL;
 535         }
 536         log_message("IMAP connection is %s-authenticated\n",
 537                     (is_preauth) ? "pre" : "un");
 538
 539         session = g_new(IMAPSession, 1);
 540         SESSION(session)->type             = SESSION_IMAP;
 541         SESSION(session)->server           = g_strdup(account->recv_server);
 542         SESSION(session)->sock             = imap_sock;
 543         SESSION(session)->connected        = TRUE;
 544         SESSION(session)->phase            = SESSION_READY;
 545         SESSION(session)->last_access_time = time(NULL);
 546         SESSION(session)->data             = NULL;
 547
 548         SESSION(session)->destroy          = imap_session_destroy;
 549
 550         session->capability = NULL;
 551
 552         session->mbox = NULL;
 553         session->authenticated = is_preauth;
 554
 555         session_list = g_list_append(session_list, session);
 556
 557         return SESSION(session);
 558 }
 559
 560 void imap_session_authenticate(IMAPSession *session, const PrefsAccount *account)
 561 {
 562         gchar *pass;
 563
 564         g_return_if_fail(account->userid != NULL);
 565
 566         pass = account->passwd;
 567         if (!pass) {
 568                 gchar *tmp_pass;
 569                 tmp_pass = input_dialog_query_password(account->recv_server, account->userid);
 570                 if (!tmp_pass)
 571                         return;
 572                 Xstrdup_a(pass, tmp_pass, {g_free(tmp_pass); return;});
 573                 g_free(tmp_pass);
 574         }
 575
 576         if (imap_cmd_login(SESSION(session)->sock, account->userid, pass) != IMAP_SUCCESS) {
 577                 imap_cmd_logout(SESSION(session)->sock);
 578                 return;
 579         }
 580
 581         session->authenticated = TRUE;
 582 }
 583
 584 void imap_session_destroy(Session *session)
 585 {
 586         sock_close(session->sock);
 587         session->sock = NULL;
 588
 589         g_free(IMAP_SESSION(session)->mbox);
 590
 591         g_strfreev(IMAP_SESSION(session)->capability);
 592
 593         session_list = g_list_remove(session_list, session);
 594 }
 595
 596 void imap_session_destroy_all(void)
 597 {
 598         while (session_list != NULL) {
 599                 IMAPSession *session = (IMAPSession *)session_list->data;
 600
 601                 imap_cmd_logout(SESSION(session)->sock);
 602                 session_destroy(SESSION(session));
 603         }
 604 }
 605
 606 gchar *imap_fetch_msg(Folder *folder, FolderItem *item, gint uid)
 607 {
 608         gchar *path, *filename;
 609         IMAPSession *session;
 610         gint ok;
 611
 612         g_return_val_if_fail(folder != NULL, NULL);
 613         g_return_val_if_fail(item != NULL, NULL);
 614
 615         path = folder_item_get_path(item);
 616         if (!is_dir_exist(path))
 617                 make_dir_hier(path);
 618         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(uid), NULL);
 619         g_free(path);
 620
 621         if (is_file_exist(filename)) {
 622                 debug_print("message %d has been already cached.\n", uid);
 623                 return filename;
 624         }
 625
 626         session = imap_session_get(folder);
 627         if (!session) {
 628                 g_free(filename);
 629                 return NULL;
 630         }
 631
 632         ok = imap_select(session, IMAP_FOLDER(folder), item->path,
 633                          NULL, NULL, NULL, NULL);
 634         if (ok != IMAP_SUCCESS) {
 635                 g_warning("can't select mailbox %s\n", item->path);
 636                 g_free(filename);
 637                 return NULL;
 638         }
 639
 640         debug_print("getting message %d...\n", uid);
 641         ok = imap_cmd_fetch(SESSION(session)->sock, (guint32)uid, filename);
 642
 643         if (ok != IMAP_SUCCESS) {
 644                 g_warning("can't fetch message %d\n", uid);
 645                 g_free(filename);
 646                 return NULL;
 647         }
 648
 649         return filename;
 650 }
 651
 652 gint imap_add_msg(Folder *folder, FolderItem *dest, const gchar *file,
 653                   gboolean remove_source)
 654 {
 655         gchar *destdir;
 656         IMAPSession *session;
 657         gint ok;
 658
 659         g_return_val_if_fail(folder != NULL, -1);
 660         g_return_val_if_fail(dest != NULL, -1);
 661         g_return_val_if_fail(file != NULL, -1);
 662
 663         session = imap_session_get(folder);
 664         if (!session) return -1;
 665
 666         destdir = imap_get_real_path(IMAP_FOLDER(folder), dest->path);
 667         ok = imap_cmd_append(SESSION(session)->sock, destdir, file);
 668         g_free(destdir);
 669
 670         if (ok != IMAP_SUCCESS) {
 671                 g_warning("can't append message %s\n", file);
 672                 return -1;
 673         }
 674
 675         if (remove_source) {
 676                 if (unlink(file) < 0)
 677                         FILE_OP_ERROR(file, "unlink");
 678         }
 679
 680         return 0;
 681 }
 682
 683 static gint imap_do_copy(Folder *folder, FolderItem *dest, MsgInfo *msginfo,
 684                          gboolean remove_source)
 685 {
 686         gchar *destdir;
 687         IMAPSession *session;
 688         IMAPFlags iflags = 0;
 689         gint messages, recent, unseen;
 690         guint32 newuid = 0, uid_validity;
 691         gint ok;
 692
 693         g_return_val_if_fail(folder != NULL, -1);
 694         g_return_val_if_fail(FOLDER_TYPE(folder) == F_IMAP, -1);
 695         g_return_val_if_fail(dest != NULL, -1);
 696         g_return_val_if_fail(msginfo != NULL, -1);
 697
 698         session = imap_session_get(folder);
 699         if (!session) return -1;
 700
 701         if (msginfo->folder == dest) {
 702                 g_warning("the src folder is identical to the dest.\n");
 703                 return -1;
 704         }
 705
 706         /* if we don't have UIDPLUS we get UID-NEXT and hope that the
 707            message really gets this uid */
 708         if (!imap_has_capability(session, "UIDPLUS")) {
 709                 ok = imap_status(session, IMAP_FOLDER(folder), dest->path,
 710                                  &messages, &recent, &newuid, &uid_validity, &unseen);
 711                 if (ok != IMAP_SUCCESS) {
 712                         g_warning("can't copy message\n");
 713                         return -1;
 714                 }
 715         }
 716
 717         destdir = imap_get_real_path(IMAP_FOLDER(folder), dest->path);
 718
 719         /* ensure source folder selected */
 720         ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder->path,
 721                          NULL, NULL, NULL, NULL);
 722         if (ok != IMAP_SUCCESS)
 723                 return -1;
 724
 725         if (remove_source)
 726                 debug_print("Moving message %s%c%d to %s ...\n",
 727                             msginfo->folder->path, G_DIR_SEPARATOR,
 728                             msginfo->msgnum, destdir);
 729         else
 730                 debug_print("Copying message %s%c%d to %s ...\n",
 731                             msginfo->folder->path, G_DIR_SEPARATOR,
 732                             msginfo->msgnum, destdir);
 733
 734         ok = imap_cmd_copy(session, msginfo->msgnum, destdir, &newuid);
 735
 736         if (ok == IMAP_SUCCESS && remove_source) {
 737                 imap_set_message_flags(session, msginfo->msgnum, msginfo->msgnum,
 738                                        IMAP_FLAG_DELETED, TRUE);
 739                 ok = imap_cmd_expunge(SESSION(session)->sock);
 740         }
 741
 742         /* get the dest folder to set the flags */
 743         if (newuid) {
 744                 ok = imap_select(session, IMAP_FOLDER(folder), dest->path,
 745                                  NULL, NULL, NULL, NULL);
 746                 if (ok != IMAP_SUCCESS)         /* the folder disappeared? */
 747                         return -1;
 748
 749                 if (msginfo->flags.perm_flags & MSG_MARKED)  iflags |= IMAP_FLAG_FLAGGED;
 750                 if (msginfo->flags.perm_flags & MSG_REPLIED) iflags |= IMAP_FLAG_ANSWERED;
 751                 if (iflags)
 752                         if (imap_set_message_flags(session, newuid, newuid, iflags, TRUE)
 753                             != IMAP_SUCCESS)
 754                                 newuid = 0;
 755         }
 756
 757         g_free(destdir);
 758
 759         if (ok == IMAP_SUCCESS)
 760                 return newuid;
 761         else
 762                 return -1;
 763 }
 764
 765 #if 0
 766 static gint imap_do_copy_msgs_with_dest(Folder *folder, FolderItem *dest,
 767                                         GSList *msglist,
 768                                         gboolean remove_source)
 769 {
 770         gchar *destdir;
 771         GSList *cur;
 772         MsgInfo *msginfo;
 773         IMAPSession *session;
 774         gint ok = IMAP_SUCCESS;
 775
 776         g_return_val_if_fail(folder != NULL, -1);
 777         g_return_val_if_fail(dest != NULL, -1);
 778         g_return_val_if_fail(msglist != NULL, -1);
 779
 780         session = imap_session_get(folder);
 781         if (!session) return -1;
 782
 783         destdir = imap_get_real_path(IMAP_FOLDER(folder), dest->path);
 784
 785         for (cur = msglist; cur != NULL; cur = cur->next) {
 786                 msginfo = (MsgInfo *)cur->data;
 787
 788                 if (msginfo->folder == dest) {
 789                         g_warning("the src folder is identical to the dest.\n");
 790                         continue;
 791                 }
 792
 793                 /* ensure source folder selected */
 794                 ok = imap_select(session, IMAP_FOLDER(folder),
 795                                  msginfo->folder->path, NULL, NULL, NULL, NULL);
 796
 797                 if (remove_source)
 798                         debug_print("Moving message %s%c%d to %s ...\n",
 799                                     msginfo->folder->path, G_DIR_SEPARATOR,
 800                                     msginfo->msgnum, destdir);
 801                 else
 802                         debug_print("Copying message %s%c%d to %s ...\n",
 803                                     msginfo->folder->path, G_DIR_SEPARATOR,
 804                                     msginfo->msgnum, destdir);
 805
 806                 ok = imap_cmd_copy(session, msginfo, destdir);
 807
 808                 if (ok == IMAP_SUCCESS && remove_source) {
 809                         imap_set_message_flags
 810                                 (session, msginfo->msgnum, msginfo->msgnum,
 811                                  IMAP_FLAG_DELETED, TRUE);
 812                 }
 813         }
 814
 815         if (remove_source)
 816                 ok = imap_cmd_expunge(SESSION(session)->sock);
 817
 818         g_free(destdir);
 819
 820         if (ok == IMAP_SUCCESS)
 821                 return 0;
 822         else
 823                 return -1;
 824 }
 825 #endif
 826
 827 gint imap_move_msg(Folder *folder, FolderItem *dest, MsgInfo *msginfo)
 828 {
 829         gchar *srcfile;
 830         gint ret = 0;
 831
 832         g_return_val_if_fail(folder != NULL, -1);
 833         g_return_val_if_fail(dest != NULL, -1);
 834         g_return_val_if_fail(msginfo != NULL, -1);
 835         g_return_val_if_fail(msginfo->folder != NULL, -1);
 836
 837         if (folder == msginfo->folder->folder)
 838                 return imap_do_copy(folder, dest, msginfo, TRUE);
 839
 840         srcfile = procmsg_get_message_file(msginfo);
 841         if (!srcfile) return -1;
 842
 843         ret = imap_add_msg(folder, dest, srcfile, FALSE);
 844         g_free(srcfile);
 845
 846         if (ret != -1) {
 847                 if(folder_item_remove_msg(msginfo->folder, msginfo->msgnum)) {
 848                         ret = -1;
 849                 }
 850         }
 851
 852         return ret;
 853 }
 854
 855 #if 0
 856 gint imap_move_msgs_with_dest(Folder *folder, FolderItem *dest,
 857                               GSList *msglist)
 858 {
 859         MsgInfo *msginfo;
 860         GSList *cur;
 861         gint ret = 0;
 862
 863         g_return_val_if_fail(folder != NULL, -1);
 864         g_return_val_if_fail(dest != NULL, -1);
 865         g_return_val_if_fail(msglist != NULL, -1);
 866
 867         msginfo = (MsgInfo *)msglist->data;
 868         if (folder == msginfo->folder->folder)
 869                 return imap_do_copy_msgs_with_dest(folder, dest, msglist, TRUE);
 870
 871         for (cur = msglist; cur != NULL; cur = cur->next) {
 872                 msginfo = (MsgInfo *)cur->data;
 873                 ret = imap_move_msg(folder, dest, msginfo);
 874                 if (ret == -1) break;
 875         }
 876
 877         return ret;
 878 }
 879 #endif
 880
 881 gint imap_copy_msg(Folder *folder, FolderItem *dest, MsgInfo *msginfo)
 882 {
 883         gchar *srcfile;
 884         gint ret = 0;
 885
 886         g_return_val_if_fail(folder != NULL, -1);
 887         g_return_val_if_fail(dest != NULL, -1);
 888         g_return_val_if_fail(msginfo != NULL, -1);
 889         g_return_val_if_fail(msginfo->folder != NULL, -1);
 890
 891         if (folder == msginfo->folder->folder)
 892                 return imap_do_copy(folder, dest, msginfo, FALSE);
 893
 894         srcfile = procmsg_get_message_file(msginfo);
 895         if (!srcfile) return -1;
 896
 897         ret = imap_add_msg(folder, dest, srcfile, FALSE);
 898
 899         g_free(srcfile);
 900
 901         return ret;
 902 }
 903
 904 #if 0
 905 gint imap_copy_msgs_with_dest(Folder *folder, FolderItem *dest,
 906                               GSList *msglist)
 907 {
 908         MsgInfo *msginfo;
 909         GSList *cur;
 910         gint ret = 0;
 911
 912         g_return_val_if_fail(folder != NULL, -1);
 913         g_return_val_if_fail(dest != NULL, -1);
 914         g_return_val_if_fail(msglist != NULL, -1);
 915
 916         msginfo = (MsgInfo *)msglist->data;
 917         if (folder == msginfo->folder->folder)
 918                 return imap_do_copy_msgs_with_dest
 919                         (folder, dest, msglist, FALSE);
 920
 921         for (cur = msglist; cur != NULL; cur = cur->next) {
 922                 msginfo = (MsgInfo *)cur->data;
 923                 ret = imap_copy_msg(folder, dest, msginfo);
 924                 if (ret == -1) break;
 925         }
 926
 927         return ret;
 928 }
 929 #endif
 930
 931 gint imap_remove_msg(Folder *folder, FolderItem *item, gint uid)
 932 {
 933         gint ok;
 934         IMAPSession *session;
 935         gchar *dir;
 936
 937         g_return_val_if_fail(folder != NULL, -1);
 938         g_return_val_if_fail(FOLDER_TYPE(folder) == F_IMAP, -1);
 939         g_return_val_if_fail(item != NULL, -1);
 940
 941         session = imap_session_get(folder);
 942         if (!session) return -1;
 943
 944         ok = imap_select(session, IMAP_FOLDER(folder), item->path,
 945                          NULL, NULL, NULL, NULL);
 946         if (ok != IMAP_SUCCESS)
 947                 return ok;
 948
 949         ok = imap_set_message_flags
 950                 (IMAP_SESSION(REMOTE_FOLDER(folder)->session),
 951                  (guint32)uid, (guint32)uid, IMAP_FLAG_DELETED, TRUE);
 952         if (ok != IMAP_SUCCESS) {
 953                 log_warning(_("can't set deleted flags: %d\n"), uid);
 954                 return ok;
 955         }
 956
 957         ok = imap_cmd_expunge(SESSION(session)->sock);
 958         if (ok != IMAP_SUCCESS) {
 959                 log_warning(_("can't expunge\n"));
 960                 return ok;
 961         }
 962
 963         dir = folder_item_get_path(item);
 964         if (is_dir_exist(dir))
 965                 remove_numbered_files(dir, uid, uid);
 966         g_free(dir);
 967
 968         return IMAP_SUCCESS;
 969 }
 970
 971 gint imap_remove_msgs(Folder *folder, FolderItem *item, GSList *msglist)
 972 {
 973         gint ok;
 974         IMAPSession *session;
 975         gchar *dir;
 976         MsgInfo *msginfo;
 977         GSList *cur;
 978         guint32 uid;
 979
 980         g_return_val_if_fail(folder != NULL, -1);
 981         g_return_val_if_fail(FOLDER_TYPE(folder) == F_IMAP, -1);
 982         g_return_val_if_fail(item != NULL, -1);
 983         g_return_val_if_fail(msglist != NULL, -1);
 984
 985         session = imap_session_get(folder);
 986         if (!session) return -1;
 987
 988         ok = imap_select(session, IMAP_FOLDER(folder), item->path,
 989                          NULL, NULL, NULL, NULL);
 990         if (ok != IMAP_SUCCESS)
 991                 return ok;
 992
 993         for (cur = msglist; cur != NULL; cur = cur->next) {
 994                 msginfo = (MsgInfo *)cur->data;
 995                 uid = msginfo->msgnum;
 996                 ok = imap_set_message_flags
 997                         (IMAP_SESSION(REMOTE_FOLDER(folder)->session),
 998                          uid, uid, IMAP_FLAG_DELETED, TRUE);
 999                 if (ok != IMAP_SUCCESS) {
1000                         log_warning(_("can't set deleted flags: %d\n"), uid);
1001                         return ok;
1002                 }
1003         }
1004
1005         ok = imap_cmd_expunge(SESSION(session)->sock);
1006         if (ok != IMAP_SUCCESS) {
1007                 log_warning(_("can't expunge\n"));
1008                 return ok;
1009         }
1010
1011         dir = folder_item_get_path(item);
1012         if (is_dir_exist(dir)) {
1013                 for (cur = msglist; cur != NULL; cur = cur->next) {
1014                         msginfo = (MsgInfo *)cur->data;
1015                         uid = msginfo->msgnum;
1016                         remove_numbered_files(dir, uid, uid);
1017                 }
1018         }
1019         g_free(dir);
1020
1021         return IMAP_SUCCESS;
1022 }
1023
1024 gint imap_remove_all_msg(Folder *folder, FolderItem *item)
1025 {
1026         gint exists, recent, unseen;
1027         guint32 uid_validity;
1028         gint ok;
1029         IMAPSession *session;
1030         gchar *dir;
1031
1032         g_return_val_if_fail(folder != NULL, -1);
1033         g_return_val_if_fail(item != NULL, -1);
1034
1035         session = imap_session_get(folder);
1036         if (!session) return -1;
1037
1038         ok = imap_select(session, IMAP_FOLDER(folder), item->path,
1039                          &exists, &recent, &unseen, &uid_validity);
1040         if (ok != IMAP_SUCCESS)
1041                 return ok;
1042         if (exists == 0)
1043                 return IMAP_SUCCESS;
1044
1045         imap_cmd_gen_send(SESSION(session)->sock,
1046                           "STORE 1:%d +FLAGS (\\Deleted)", exists);
1047         ok = imap_cmd_ok(SESSION(session)->sock, NULL);
1048         if (ok != IMAP_SUCCESS) {
1049                 log_warning(_("can't set deleted flags: 1:%d\n"), exists);
1050                 return ok;
1051         }
1052
1053         ok = imap_cmd_expunge(SESSION(session)->sock);
1054         if (ok != IMAP_SUCCESS) {
1055                 log_warning(_("can't expunge\n"));
1056                 return ok;
1057         }
1058
1059         dir = folder_item_get_path(item);
1060         if (is_dir_exist(dir))
1061                 remove_all_numbered_files(dir);
1062         g_free(dir);
1063
1064         return IMAP_SUCCESS;
1065 }
1066
1067 gboolean imap_is_msg_changed(Folder *folder, FolderItem *item, MsgInfo *msginfo)
1068 {
1069         /* TODO: properly implement this method */
1070         return FALSE;
1071 }
1072
1073 gint imap_scan_folder(Folder *folder, FolderItem *item)
1074 {
1075         IMAPSession *session;
1076         gint messages, recent, unseen;
1077         guint32 uid_next, uid_validity;
1078         gint ok;
1079
1080         g_return_val_if_fail(folder != NULL, -1);
1081         g_return_val_if_fail(item != NULL, -1);
1082
1083         session = imap_session_get(folder);
1084         if (!session) return -1;
1085
1086         ok = imap_status(session, IMAP_FOLDER(folder), item->path,
1087                          &messages, &recent, &uid_next, &uid_validity, &unseen);
1088         if (ok != IMAP_SUCCESS) return -1;
1089
1090         item->new = unseen > 0 ? recent : 0;
1091         item->unread = unseen;
1092         item->total = messages;
1093         item->last_num = (messages > 0 && uid_next > 0) ? uid_next - 1 : 0;
1094         /* item->mtime = uid_validity; */
1095
1096         return 0;
1097 }
1098
1099 void imap_scan_tree(Folder *folder)
1100 {
1101         FolderItem *item;
1102         IMAPSession *session;
1103         gchar *root_folder = NULL;
1104
1105         g_return_if_fail(folder != NULL);
1106         g_return_if_fail(folder->account != NULL);
1107
1108         session = imap_session_get(folder);
1109         if (!session) {
1110                 if (!folder->node) {
1111                         folder_tree_destroy(folder);
1112                         item = folder_item_new(folder, folder->name, NULL);
1113                         item->folder = folder;
1114                         folder->node = g_node_new(item);
1115                 }
1116                 return;
1117         }
1118
1119         if (folder->account->imap_dir && *folder->account->imap_dir) {
1120                 Xstrdup_a(root_folder, folder->account->imap_dir, return);
1121                 strtailchomp(root_folder, '/');
1122                 debug_print("IMAP root directory: %s\n", root_folder);
1123         }
1124
1125         item = folder_item_new(folder, folder->name, root_folder);
1126         item->folder = folder;
1127         item->no_select = TRUE;
1128         folder->node = g_node_new(item);
1129
1130         imap_scan_tree_recursive(session, item);
1131
1132         imap_create_missing_folders(folder);
1133 }
1134
1135 static gint imap_scan_tree_recursive(IMAPSession *session, FolderItem *item)
1136 {
1137         Folder *folder;
1138         IMAPFolder *imapfolder;
1139         FolderItem *new_item;
1140         GSList *item_list, *cur;
1141         gchar *real_path;
1142         gchar *wildcard_path;
1143         gchar separator;
1144         gchar wildcard[3];
1145
1146         g_return_val_if_fail(item != NULL, -1);
1147         g_return_val_if_fail(item->folder != NULL, -1);
1148         g_return_val_if_fail(item->no_sub == FALSE, -1);
1149
1150         folder = FOLDER(item->folder);
1151         imapfolder = IMAP_FOLDER(folder);
1152
1153         separator = imap_get_path_separator(imapfolder, item->path);
1154
1155         if (item->folder->ui_func)
1156                 item->folder->ui_func(folder, item, folder->ui_func_data);
1157
1158         if (item->path) {
1159                 wildcard[0] = separator;
1160                 wildcard[1] = '%';
1161                 wildcard[2] = '\0';
1162                 real_path = imap_get_real_path(imapfolder, item->path);
1163         } else {
1164                 wildcard[0] = '%';
1165                 wildcard[1] = '\0';
1166                 real_path = g_strdup("");
1167         }
1168
1169         Xstrcat_a(wildcard_path, real_path, wildcard,
1170                   {g_free(real_path); return IMAP_ERROR;});
1171         QUOTE_IF_REQUIRED(wildcard_path, wildcard_path);
1172
1173         imap_cmd_gen_send(SESSION(session)->sock, "LIST \"\" %s",
1174                           wildcard_path);
1175
1176         strtailchomp(real_path, separator);
1177         item_list = imap_parse_list(folder, session, real_path, NULL);
1178         g_free(real_path);
1179
1180         for (cur = item_list; cur != NULL; cur = cur->next) {
1181                 new_item = cur->data;
1182                 if (!strcmp(new_item->path, "INBOX")) {
1183                         if (!folder->inbox) {
1184                                 new_item->stype = F_INBOX;
1185                                 item->folder->inbox = new_item;
1186                         } else {
1187                                 folder_item_destroy(new_item);
1188                                 continue;
1189                         }
1190                 } else if (!item->parent || item->stype == F_INBOX) {
1191                         gchar *base;
1192
1193                         base = g_basename(new_item->path);
1194
1195                         if (!folder->outbox && !strcasecmp(base, "Sent")) {
1196                                 new_item->stype = F_OUTBOX;
1197                                 folder->outbox = new_item;
1198                         } else if (!folder->draft && !strcasecmp(base, "Drafts")) {
1199                                 new_item->stype = F_DRAFT;
1200                                 folder->draft = new_item;
1201                         } else if (!folder->queue && !strcasecmp(base, "Queue")) {
1202                                 new_item->stype = F_QUEUE;
1203                                 folder->queue = new_item;
1204                         } else if (!folder->trash && !strcasecmp(base, "Trash")) {
1205                                 new_item->stype = F_TRASH;
1206                                 folder->trash = new_item;
1207                         }
1208                 }
1209                 folder_item_append(item, new_item);
1210                 if (new_item->no_select == FALSE)
1211                         imap_scan_folder(folder, new_item);
1212                 if (new_item->no_sub == FALSE)
1213                         imap_scan_tree_recursive(session, new_item);
1214         }
1215
1216         return IMAP_SUCCESS;
1217 }
1218
1219 static GSList *imap_parse_list(Folder *folder, IMAPSession *session,
1220                                const gchar *real_path, gchar *separator)
1221 {
1222         gchar buf[IMAPBUFSIZE];
1223         gchar flags[256];
1224         gchar separator_str[16];
1225         gchar *p;
1226         gchar *name;
1227         gchar *loc_name, *loc_path;
1228         GSList *item_list = NULL;
1229         GString *str;
1230         FolderItem *new_item;
1231
1232         debug_print("getting list of %s ...\n",
1233                     *real_path ? real_path : "\"\"");
1234
1235         str = g_string_new(NULL);
1236
1237         for (;;) {
1238                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) <= 0) {
1239                         log_warning(_("error occured while getting LIST.\n"));
1240                         break;
1241                 }
1242                 strretchomp(buf);
1243                 if (buf[0] != '*' || buf[1] != ' ') {
1244                         log_print("IMAP4< %s\n", buf);
1245                         break;
1246                 }
1247                 debug_print("IMAP4< %s\n", buf);
1248
1249                 g_string_assign(str, buf);
1250                 p = str->str + 2;
1251                 if (strncmp(p, "LIST ", 5) != 0) continue;
1252                 p += 5;
1253
1254                 if (*p != '(') continue;
1255                 p++;
1256                 p = strchr_cpy(p, ')', flags, sizeof(flags));
1257                 if (!p) continue;
1258                 while (*p == ' ') p++;
1259
1260                 p = strchr_cpy(p, ' ', separator_str, sizeof(separator_str));
1261                 if (!p) continue;
1262                 extract_quote(separator_str, '"');
1263                 if (!strcmp(separator_str, "NIL"))
1264                         separator_str[0] = '\0';
1265                 if (separator)
1266                         *separator = separator_str[0];
1267
1268                 buf[0] = '\0';
1269                 while (*p == ' ') p++;
1270                 if (*p == '{' || *p == '"')
1271                         p = imap_parse_atom(SESSION(session)->sock, p,
1272                                             buf, sizeof(buf), str);
1273                 else
1274                         strncpy2(buf, p, sizeof(buf));
1275                 strtailchomp(buf, separator_str[0]);
1276                 if (buf[0] == '\0') continue;
1277                 if (!strcmp(buf, real_path)) continue;
1278
1279                 if (separator_str[0] != '\0')
1280                         subst_char(buf, separator_str[0], '/');
1281                 name = g_basename(buf);
1282                 if (name[0] == '.') continue;
1283
1284                 loc_name = imap_modified_utf7_to_locale(name);
1285                 loc_path = imap_modified_utf7_to_locale(buf);
1286                 new_item = folder_item_new(folder, loc_name, loc_path);
1287                 if (strcasestr(flags, "\\Noinferiors") != NULL)
1288                         new_item->no_sub = TRUE;
1289                 if (strcmp(buf, "INBOX") != 0 &&
1290                     strcasestr(flags, "\\Noselect") != NULL)
1291                         new_item->no_select = TRUE;
1292
1293                 item_list = g_slist_append(item_list, new_item);
1294
1295                 debug_print("folder %s has been added.\n", loc_path);
1296                 g_free(loc_path);
1297                 g_free(loc_name);
1298         }
1299
1300         g_string_free(str, TRUE);
1301
1302         return item_list;
1303 }
1304
1305 gint imap_create_tree(Folder *folder)
1306 {
1307         g_return_val_if_fail(folder != NULL, -1);
1308         g_return_val_if_fail(folder->node != NULL, -1);
1309         g_return_val_if_fail(folder->node->data != NULL, -1);
1310         g_return_val_if_fail(folder->account != NULL, -1);
1311
1312         imap_scan_tree(folder);
1313         imap_create_missing_folders(folder);
1314
1315         return 0;
1316 }
1317
1318 static void imap_create_missing_folders(Folder *folder)
1319 {
1320         g_return_if_fail(folder != NULL);
1321
1322         if (!folder->inbox)
1323                 folder->inbox = imap_create_special_folder
1324                         (folder, F_INBOX, "INBOX");
1325 #if 0
1326         if (!folder->outbox)
1327                 folder->outbox = imap_create_special_folder
1328                         (folder, F_OUTBOX, "Sent");
1329         if (!folder->draft)
1330                 folder->draft = imap_create_special_folder
1331                         (folder, F_DRAFT, "Drafts");
1332         if (!folder->queue)
1333                 folder->queue = imap_create_special_folder
1334                         (folder, F_QUEUE, "Queue");
1335 #endif
1336         if (!folder->trash)
1337                 folder->trash = imap_create_special_folder
1338                         (folder, F_TRASH, "Trash");
1339 }
1340
1341 static FolderItem *imap_create_special_folder(Folder *folder,
1342                                               SpecialFolderItemType stype,
1343                                               const gchar *name)
1344 {
1345         FolderItem *item;
1346         FolderItem *new_item;
1347
1348         g_return_val_if_fail(folder != NULL, NULL);
1349         g_return_val_if_fail(folder->node != NULL, NULL);
1350         g_return_val_if_fail(folder->node->data != NULL, NULL);
1351         g_return_val_if_fail(folder->account != NULL, NULL);
1352         g_return_val_if_fail(name != NULL, NULL);
1353
1354         item = FOLDER_ITEM(folder->node->data);
1355         new_item = imap_create_folder(folder, item, name);
1356
1357         if (!new_item) {
1358                 g_warning("Can't create '%s'\n", name);
1359                 if (!folder->inbox) return NULL;
1360
1361                 new_item = imap_create_folder(folder, folder->inbox, name);
1362                 if (!new_item)
1363                         g_warning("Can't create '%s' under INBOX\n", name);
1364                 else
1365                         new_item->stype = stype;
1366         } else
1367                 new_item->stype = stype;
1368
1369         return new_item;
1370 }
1371
1372 FolderItem *imap_create_folder(Folder *folder, FolderItem *parent,
1373                                const gchar *name)
1374 {
1375         gchar *dirpath, *imap_path;
1376         IMAPSession *session;
1377         FolderItem *new_item;
1378         gchar separator;
1379         gchar *new_name;
1380         const gchar *p;
1381         gint ok;
1382
1383         g_return_val_if_fail(folder != NULL, NULL);
1384         g_return_val_if_fail(folder->account != NULL, NULL);
1385         g_return_val_if_fail(parent != NULL, NULL);
1386         g_return_val_if_fail(name != NULL, NULL);
1387
1388         session = imap_session_get(folder);
1389         if (!session) return NULL;
1390
1391         if (!parent->parent && strcmp(name, "INBOX") == 0)
1392                 dirpath = g_strdup(name);
1393         else if (parent->path)
1394                 dirpath = g_strconcat(parent->path, "/", name, NULL);
1395         else if ((p = strchr(name, '/')) != NULL && *(p + 1) != '\0')
1396                 dirpath = g_strdup(name);
1397         else if (folder->account->imap_dir && *folder->account->imap_dir) {
1398                 gchar *imap_dir;
1399
1400                 Xstrdup_a(imap_dir, folder->account->imap_dir, return NULL);
1401                 strtailchomp(imap_dir, '/');
1402                 dirpath = g_strconcat(imap_dir, "/", name, NULL);
1403         } else
1404                 dirpath = g_strdup(name);
1405
1406         /* keep trailing directory separator to create a folder that contains
1407            sub folder */
1408         imap_path = imap_locale_to_modified_utf7(dirpath);
1409         strtailchomp(dirpath, '/');
1410         Xstrdup_a(new_name, name, {g_free(dirpath); return NULL;});
1411         strtailchomp(new_name, '/');
1412         separator = imap_get_path_separator(IMAP_FOLDER(folder), imap_path);
1413         imap_path_separator_subst(imap_path, separator);
1414         subst_char(new_name, '/', separator);
1415
1416         if (strcmp(name, "INBOX") != 0) {
1417                 GPtrArray *argbuf;
1418                 gint i;
1419                 gboolean exist = FALSE;
1420
1421                 argbuf = g_ptr_array_new();
1422                 ok = imap_cmd_list(SESSION(session)->sock, NULL, imap_path,
1423                                    argbuf);
1424                 if (ok != IMAP_SUCCESS) {
1425                         log_warning(_("can't create mailbox: LIST failed\n"));
1426                         g_free(imap_path);
1427                         g_free(dirpath);
1428                         ptr_array_free_strings(argbuf);
1429                         g_ptr_array_free(argbuf, TRUE);
1430                         return NULL;
1431                 }
1432
1433                 for (i = 0; i < argbuf->len; i++) {
1434                         gchar *str;
1435                         str = g_ptr_array_index(argbuf, i);
1436                         if (!strncmp(str, "LIST ", 5)) {
1437                                 exist = TRUE;
1438                                 break;
1439                         }
1440                 }
1441                 ptr_array_free_strings(argbuf);
1442                 g_ptr_array_free(argbuf, TRUE);
1443
1444                 if (!exist) {
1445                         ok = imap_cmd_create(SESSION(session)->sock, imap_path);
1446                         if (ok != IMAP_SUCCESS) {
1447                                 log_warning(_("can't create mailbox\n"));
1448                                 g_free(imap_path);
1449                                 g_free(dirpath);
1450                                 return NULL;
1451                         }
1452                 }
1453         }
1454
1455         new_item = folder_item_new(folder, new_name, dirpath);
1456         folder_item_append(parent, new_item);
1457         g_free(imap_path);
1458         g_free(dirpath);
1459
1460         dirpath = folder_item_get_path(new_item);
1461         if (!is_dir_exist(dirpath))
1462                 make_dir_hier(dirpath);
1463         g_free(dirpath);
1464
1465         return new_item;
1466 }
1467
1468 gint imap_rename_folder(Folder *folder, FolderItem *item, const gchar *name)
1469 {
1470         gchar *dirpath;
1471         gchar *newpath;
1472         gchar *real_oldpath;
1473         gchar *real_newpath;
1474         GNode *node;
1475         gchar *paths[2];
1476         gchar *old_cache_dir;
1477         gchar *new_cache_dir;
1478         IMAPSession *session;
1479         gchar separator;
1480         gint ok;
1481         gint exists, recent, unseen;
1482         guint32 uid_validity;
1483
1484         g_return_val_if_fail(folder != NULL, -1);
1485         g_return_val_if_fail(item != NULL, -1);
1486         g_return_val_if_fail(item->path != NULL, -1);
1487         g_return_val_if_fail(name != NULL, -1);
1488
1489         session = imap_session_get(folder);
1490         if (!session) return -1;
1491
1492         real_oldpath = imap_get_real_path(IMAP_FOLDER(folder), item->path);
1493
1494         g_free(session->mbox);
1495         session->mbox = NULL;
1496         ok = imap_cmd_examine(SESSION(session)->sock, "INBOX",
1497                               &exists, &recent, &unseen, &uid_validity);
1498         if (ok != IMAP_SUCCESS) {
1499                 g_free(real_oldpath);
1500                 return -1;
1501         }
1502
1503         separator = imap_get_path_separator(IMAP_FOLDER(folder), item->path);
1504         if (strchr(item->path, G_DIR_SEPARATOR)) {
1505                 dirpath = g_dirname(item->path);
1506                 newpath = g_strconcat(dirpath, G_DIR_SEPARATOR_S, name, NULL);
1507                 g_free(dirpath);
1508         } else
1509                 newpath = g_strdup(name);
1510
1511         real_newpath = imap_locale_to_modified_utf7(newpath);
1512         imap_path_separator_subst(real_newpath, separator);
1513
1514         ok = imap_cmd_rename(SESSION(session)->sock, real_oldpath, real_newpath);
1515         if (ok != IMAP_SUCCESS) {
1516                 log_warning(_("can't rename mailbox: %s to %s\n"),
1517                             real_oldpath, real_newpath);
1518                 g_free(real_oldpath);
1519                 g_free(newpath);
1520                 g_free(real_newpath);
1521                 return -1;
1522         }
1523
1524         g_free(item->name);
1525         item->name = g_strdup(name);
1526
1527         old_cache_dir = folder_item_get_path(item);
1528
1529         node = g_node_find(item->folder->node, G_PRE_ORDER, G_TRAVERSE_ALL,
1530                            item);
1531         paths[0] = g_strdup(item->path);
1532         paths[1] = newpath;
1533         g_node_traverse(node, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
1534                         imap_rename_folder_func, paths);
1535
1536         if (is_dir_exist(old_cache_dir)) {
1537                 new_cache_dir = folder_item_get_path(item);
1538                 if (rename(old_cache_dir, new_cache_dir) < 0) {
1539                         FILE_OP_ERROR(old_cache_dir, "rename");
1540                 }
1541                 g_free(new_cache_dir);
1542         }
1543
1544         g_free(old_cache_dir);
1545         g_free(paths[0]);
1546         g_free(newpath);
1547         g_free(real_oldpath);
1548         g_free(real_newpath);
1549
1550         return 0;
1551 }
1552
1553 gint imap_remove_folder(Folder *folder, FolderItem *item)
1554 {
1555         gint ok;
1556         IMAPSession *session;
1557         gchar *path;
1558         gchar *cache_dir;
1559         gint exists, recent, unseen;
1560         guint32 uid_validity;
1561
1562         g_return_val_if_fail(folder != NULL, -1);
1563         g_return_val_if_fail(item != NULL, -1);
1564         g_return_val_if_fail(item->path != NULL, -1);
1565
1566         session = imap_session_get(folder);
1567         if (!session) return -1;
1568
1569         path = imap_get_real_path(IMAP_FOLDER(folder), item->path);
1570
1571         ok = imap_cmd_examine(SESSION(session)->sock, "INBOX",
1572                               &exists, &recent, &unseen, &uid_validity);
1573         if (ok != IMAP_SUCCESS) {
1574                 g_free(path);
1575                 return -1;
1576         }
1577
1578         ok = imap_cmd_delete(SESSION(session)->sock, path);
1579         if (ok != IMAP_SUCCESS) {
1580                 log_warning(_("can't delete mailbox\n"));
1581                 g_free(path);
1582                 return -1;
1583         }
1584
1585         g_free(path);
1586         cache_dir = folder_item_get_path(item);
1587         if (is_dir_exist(cache_dir) && remove_dir_recursive(cache_dir) < 0)
1588                 g_warning("can't remove directory '%s'\n", cache_dir);
1589         g_free(cache_dir);
1590         folder_item_remove(item);
1591
1592         return 0;
1593 }
1594
1595 static GSList *imap_get_uncached_messages(IMAPSession *session,
1596                                           FolderItem *item,
1597                                           guint32 first_uid, guint32 last_uid)
1598 {
1599         gchar *tmp;
1600         GSList *newlist = NULL;
1601         GSList *llast = NULL;
1602         GString *str;
1603         MsgInfo *msginfo;
1604
1605         g_return_val_if_fail(session != NULL, NULL);
1606         g_return_val_if_fail(item != NULL, NULL);
1607         g_return_val_if_fail(item->folder != NULL, NULL);
1608         g_return_val_if_fail(FOLDER_TYPE(item->folder) == F_IMAP, NULL);
1609         g_return_val_if_fail(first_uid <= last_uid, NULL);
1610
1611         if (imap_cmd_envelope(SESSION(session)->sock, first_uid, last_uid)
1612             != IMAP_SUCCESS) {
1613                 log_warning(_("can't get envelope\n"));
1614                 return NULL;
1615         }
1616
1617         str = g_string_new(NULL);
1618
1619         for (;;) {
1620                 if ((tmp = sock_getline(SESSION(session)->sock)) == NULL) {
1621                         log_warning(_("error occurred while getting envelope.\n"));
1622                         g_string_free(str, TRUE);
1623                         return newlist;
1624                 }
1625                 strretchomp(tmp);
1626                 if (tmp[0] != '*' || tmp[1] != ' ') {
1627                         log_print("IMAP4< %s\n", tmp);
1628                         g_free(tmp);
1629                         break;
1630                 }
1631                 if (strstr(tmp, "FETCH") == NULL) {
1632                         log_print("IMAP4< %s\n", tmp);
1633                         g_free(tmp);
1634                         continue;
1635                 }
1636                 log_print("IMAP4< %s\n", tmp);
1637                 g_string_assign(str, tmp);
1638                 g_free(tmp);
1639
1640                 msginfo = imap_parse_envelope
1641                         (SESSION(session)->sock, item, str);
1642                 if (!msginfo) {
1643                         log_warning(_("can't parse envelope: %s\n"), str->str);
1644                         continue;
1645                 }
1646                 if (item->stype == F_QUEUE) {
1647                         MSG_SET_TMP_FLAGS(msginfo->flags, MSG_QUEUED);
1648                 } else if (item->stype == F_DRAFT) {
1649                         MSG_SET_TMP_FLAGS(msginfo->flags, MSG_DRAFT);
1650                 }
1651
1652                 msginfo->folder = item;
1653
1654                 if (!newlist)
1655                         llast = newlist = g_slist_append(newlist, msginfo);
1656                 else {
1657                         llast = g_slist_append(llast, msginfo);
1658                         llast = llast->next;
1659                 }
1660         }
1661
1662         g_string_free(str, TRUE);
1663
1664         return newlist;
1665 }
1666
1667 static void imap_delete_all_cached_messages(FolderItem *item)
1668 {
1669         gchar *dir;
1670
1671         g_return_if_fail(item != NULL);
1672         g_return_if_fail(item->folder != NULL);
1673         g_return_if_fail(FOLDER_TYPE(item->folder) == F_IMAP);
1674
1675         debug_print("Deleting all cached messages...\n");
1676
1677         dir = folder_item_get_path(item);
1678         if (is_dir_exist(dir))
1679                 remove_all_numbered_files(dir);
1680         g_free(dir);
1681
1682         debug_print("done.\n");
1683 }
1684
1685 #if USE_OPENSSL
1686 static SockInfo *imap_open_tunnel(const gchar *server,
1687                            const gchar *tunnelcmd,
1688                            SSLType ssl_type)
1689 #else
1690 static SockInfo *imap_open_tunnel(const gchar *server,
1691                            const gchar *tunnelcmd)
1692 #endif
1693 {
1694         SockInfo *sock;
1695
1696         if ((sock = sock_connect_cmd(server, tunnelcmd)) == NULL)
1697                 log_warning(_("Can't establish IMAP4 session with: %s\n"),
1698                             server);
1699                 return NULL;
1700 #if USE_OPENSSL
1701         return imap_init_sock(sock, ssl_type);
1702 #else
1703         return imap_init_sock(sock);
1704 #endif
1705 }
1706
1707
1708 #if USE_OPENSSL
1709 static SockInfo *imap_open(const gchar *server, gushort port,
1710                            SSLType ssl_type)
1711 #else
1712 static SockInfo *imap_open(const gchar *server, gushort port)
1713 #endif
1714 {
1715         SockInfo *sock;
1716
1717         if ((sock = sock_connect(server, port)) == NULL) {
1718                 log_warning(_("Can't connect to IMAP4 server: %s:%d\n"),
1719                             server, port);
1720                 return NULL;
1721         }
1722
1723 #if USE_OPENSSL
1724         if (ssl_type == SSL_TUNNEL && !ssl_init_socket(sock)) {
1725                 log_warning(_("Can't establish IMAP4 session with: %s:%d\n"),
1726                             server, port);
1727                 sock_close(sock);
1728                 return NULL;
1729         }
1730         return imap_init_sock(sock, ssl_type);
1731 #else
1732         return imap_init_sock(sock);
1733 #endif
1734 }
1735
1736 #if USE_OPENSSL
1737 static SockInfo *imap_init_sock(SockInfo *sock, SSLType ssl_type)
1738 #else
1739 static SockInfo *imap_init_sock(SockInfo *sock)
1740 #endif
1741 {
1742         imap_cmd_count = 0;
1743 #if USE_OPENSSL
1744         if (ssl_type == SSL_STARTTLS) {
1745                 gint ok;
1746
1747                 ok = imap_cmd_starttls(sock);
1748                 if (ok != IMAP_SUCCESS) {
1749                         log_warning(_("Can't start TLS session.\n"));
1750                         sock_close(sock);
1751                         return NULL;
1752                 }
1753                 if (!ssl_init_socket_with_method(sock, SSL_METHOD_TLSv1)) {
1754                         sock_close(sock);
1755                         return NULL;
1756                 }
1757         }
1758 #endif
1759
1760         if (imap_cmd_noop(sock) != IMAP_SUCCESS) {
1761                 log_warning(_("Can't establish IMAP4 session.\n"));
1762                 sock_close(sock);
1763                 return NULL;
1764         }
1765
1766         return sock;
1767 }
1768
1769 static GList *imap_parse_namespace_str(gchar *str)
1770 {
1771         gchar *p = str;
1772         gchar *name;
1773         gchar *separator;
1774         IMAPNameSpace *namespace;
1775         GList *ns_list = NULL;
1776
1777         while (*p != '\0') {
1778                 /* parse ("#foo" "/") */
1779
1780                 while (*p && *p != '(') p++;
1781                 if (*p == '\0') break;
1782                 p++;
1783
1784                 while (*p && *p != '"') p++;
1785                 if (*p == '\0') break;
1786                 p++;
1787                 name = p;
1788
1789                 while (*p && *p != '"') p++;
1790                 if (*p == '\0') break;
1791                 *p = '\0';
1792                 p++;
1793
1794                 while (*p && isspace(*p)) p++;
1795                 if (*p == '\0') break;
1796                 if (strncmp(p, "NIL", 3) == 0)
1797                         separator = NULL;
1798                 else if (*p == '"') {
1799                         p++;
1800                         separator = p;
1801                         while (*p && *p != '"') p++;
1802                         if (*p == '\0') break;
1803                         *p = '\0';
1804                         p++;
1805                 } else break;
1806
1807                 while (*p && *p != ')') p++;
1808                 if (*p == '\0') break;
1809                 p++;
1810
1811                 namespace = g_new(IMAPNameSpace, 1);
1812                 namespace->name = g_strdup(name);
1813                 namespace->separator = separator ? separator[0] : '\0';
1814                 ns_list = g_list_append(ns_list, namespace);
1815         }
1816
1817         return ns_list;
1818 }
1819
1820 static void imap_parse_namespace(IMAPSession *session, IMAPFolder *folder)
1821 {
1822         gchar *ns_str;
1823         gchar **str_array;
1824
1825         g_return_if_fail(session != NULL);
1826         g_return_if_fail(folder != NULL);
1827
1828         if (folder->ns_personal != NULL ||
1829             folder->ns_others   != NULL ||
1830             folder->ns_shared   != NULL)
1831                 return;
1832
1833         if (!imap_has_capability(session, "NAMESPACE")) {
1834                 imap_get_namespace_by_list(session, folder);
1835                 return;
1836         }
1837
1838         if (imap_cmd_namespace(SESSION(session)->sock, &ns_str)
1839             != IMAP_SUCCESS) {
1840                 log_warning(_("can't get namespace\n"));
1841                 return;
1842         }
1843
1844         str_array = strsplit_parenthesis(ns_str, '(', ')', 3);
1845         if (str_array == NULL) {
1846                 g_free(ns_str);
1847                 imap_get_namespace_by_list(session, folder);
1848                 return;
1849         }
1850         if (str_array[0])
1851                 folder->ns_personal = imap_parse_namespace_str(str_array[0]);
1852         if (str_array[0] && str_array[1])
1853                 folder->ns_others = imap_parse_namespace_str(str_array[1]);
1854         if (str_array[0] && str_array[1] && str_array[2])
1855                 folder->ns_shared = imap_parse_namespace_str(str_array[2]);
1856         g_strfreev(str_array);
1857         g_free(ns_str);
1858 }
1859
1860 static void imap_get_namespace_by_list(IMAPSession *session, IMAPFolder *folder)
1861 {
1862         GSList *item_list, *cur;
1863         gchar separator = '\0';
1864         IMAPNameSpace *namespace;
1865
1866         g_return_if_fail(session != NULL);
1867         g_return_if_fail(folder != NULL);
1868
1869         if (folder->ns_personal != NULL ||
1870             folder->ns_others   != NULL ||
1871             folder->ns_shared   != NULL)
1872                 return;
1873
1874         imap_cmd_gen_send(SESSION(session)->sock, "LIST \"\" \"\"");
1875         item_list = imap_parse_list(NULL, session, "", &separator);
1876         for (cur = item_list; cur != NULL; cur = cur->next)
1877                 folder_item_destroy(FOLDER_ITEM(cur->data));
1878         g_slist_free(item_list);
1879
1880         namespace = g_new(IMAPNameSpace, 1);
1881         namespace->name = g_strdup("");
1882         namespace->separator = separator;
1883         folder->ns_personal = g_list_append(NULL, namespace);
1884 }
1885
1886 static IMAPNameSpace *imap_find_namespace_from_list(GList *ns_list,
1887                                                     const gchar *path)
1888 {
1889         IMAPNameSpace *namespace = NULL;
1890         gchar *tmp_path, *name;
1891
1892         if (!path) path = "";
1893
1894         Xstrcat_a(tmp_path, path, "/", return NULL);
1895
1896         for (; ns_list != NULL; ns_list = ns_list->next) {
1897                 IMAPNameSpace *tmp_ns = ns_list->data;
1898
1899                 Xstrdup_a(name, tmp_ns->name, return namespace);
1900                 if (tmp_ns->separator && tmp_ns->separator != '/')
1901                         subst_char(name, tmp_ns->separator, '/');
1902                 if (strncmp(tmp_path, name, strlen(name)) == 0)
1903                         namespace = tmp_ns;
1904         }
1905
1906         return namespace;
1907 }
1908
1909 static IMAPNameSpace *imap_find_namespace(IMAPFolder *folder,
1910                                           const gchar *path)
1911 {
1912         IMAPNameSpace *namespace;
1913
1914         g_return_val_if_fail(folder != NULL, NULL);
1915
1916         namespace = imap_find_namespace_from_list(folder->ns_personal, path);
1917         if (namespace) return namespace;
1918         namespace = imap_find_namespace_from_list(folder->ns_others, path);
1919         if (namespace) return namespace;
1920         namespace = imap_find_namespace_from_list(folder->ns_shared, path);
1921         if (namespace) return namespace;
1922
1923         return NULL;
1924 }
1925
1926 static gchar imap_get_path_separator(IMAPFolder *folder, const gchar *path)
1927 {
1928         IMAPNameSpace *namespace;
1929         gchar separator = '/';
1930
1931         namespace = imap_find_namespace(folder, path);
1932         if (namespace && namespace->separator)
1933                 separator = namespace->separator;
1934
1935         return separator;
1936 }
1937
1938 static gchar *imap_get_real_path(IMAPFolder *folder, const gchar *path)
1939 {
1940         gchar *real_path;
1941         gchar separator;
1942
1943         g_return_val_if_fail(folder != NULL, NULL);
1944         g_return_val_if_fail(path != NULL, NULL);
1945
1946         real_path = imap_locale_to_modified_utf7(path);
1947         separator = imap_get_path_separator(folder, path);
1948         imap_path_separator_subst(real_path, separator);
1949
1950         return real_path;
1951 }
1952
1953 static gchar *imap_parse_atom(SockInfo *sock, gchar *src,
1954                               gchar *dest, gint dest_len, GString *str)
1955 {
1956         gchar *cur_pos = src;
1957         gchar *nextline;
1958
1959         g_return_val_if_fail(str != NULL, cur_pos);
1960
1961         /* read the next line if the current response buffer is empty */
1962         while (isspace(*cur_pos)) cur_pos++;
1963         while (*cur_pos == '\0') {
1964                 if ((nextline = sock_getline(sock)) == NULL)
1965                         return cur_pos;
1966                 g_string_assign(str, nextline);
1967                 cur_pos = str->str;
1968                 strretchomp(nextline);
1969                 /* log_print("IMAP4< %s\n", nextline); */
1970                 debug_print("IMAP4< %s\n", nextline);
1971                 g_free(nextline);
1972
1973                 while (isspace(*cur_pos)) cur_pos++;
1974         }
1975
1976         if (!strncmp(cur_pos, "NIL", 3)) {
1977                 *dest = '\0';
1978                 cur_pos += 3;
1979         } else if (*cur_pos == '\"') {
1980                 gchar *p;
1981
1982                 p = get_quoted(cur_pos, '\"', dest, dest_len);
1983                 cur_pos = p ? p : cur_pos + 2;
1984         } else if (*cur_pos == '{') {
1985                 gchar buf[32];
1986                 gint len;
1987                 gint line_len = 0;
1988
1989                 cur_pos = strchr_cpy(cur_pos + 1, '}', buf, sizeof(buf));
1990                 len = atoi(buf);
1991
1992                 g_string_truncate(str, 0);
1993                 cur_pos = str->str;
1994
1995                 do {
1996                         if ((nextline = sock_getline(sock)) == NULL)
1997                                 return cur_pos;
1998                         line_len += strlen(nextline);
1999                         g_string_append(str, nextline);
2000                         cur_pos = str->str;
2001                         strretchomp(nextline);
2002                         /* log_print("IMAP4< %s\n", nextline); */
2003                         debug_print("IMAP4< %s\n", nextline);
2004                         g_free(nextline);
2005                 } while (line_len < len);
2006
2007                 memcpy(dest, cur_pos, MIN(len, dest_len - 1));
2008                 dest[MIN(len, dest_len - 1)] = '\0';
2009                 cur_pos += len;
2010         }
2011
2012         return cur_pos;
2013 }
2014
2015 static gchar *imap_get_header(SockInfo *sock, gchar *cur_pos, gchar **headers,
2016                               GString *str)
2017 {
2018         gchar *nextline;
2019         gchar buf[32];
2020         gint len;
2021         gint block_len = 0;
2022
2023         *headers = NULL;
2024
2025         g_return_val_if_fail(str != NULL, cur_pos);
2026
2027         while (isspace(*cur_pos)) cur_pos++;
2028
2029         g_return_val_if_fail(*cur_pos == '{', cur_pos);
2030
2031         cur_pos = strchr_cpy(cur_pos + 1, '}', buf, sizeof(buf));
2032         len = atoi(buf);
2033
2034         g_string_truncate(str, 0);
2035         cur_pos = str->str;
2036
2037         do {
2038                 if ((nextline = sock_getline(sock)) == NULL)
2039                         return cur_pos;
2040                 block_len += strlen(nextline);
2041                 g_string_append(str, nextline);
2042                 cur_pos = str->str;
2043                 strretchomp(nextline);
2044                 /* debug_print("IMAP4< %s\n", nextline); */
2045                 g_free(nextline);
2046         } while (block_len < len);
2047
2048         debug_print("IMAP4< [contents of BODY.PEEK[HEADER.FIELDS (...)]]\n");
2049
2050         *headers = g_strndup(cur_pos, len);
2051         cur_pos += len;
2052
2053         while (isspace(*cur_pos)) cur_pos++;
2054         while (*cur_pos == '\0') {
2055                 if ((nextline = sock_getline(sock)) == NULL)
2056                         return cur_pos;
2057                 g_string_assign(str, nextline);
2058                 cur_pos = str->str;
2059                 strretchomp(nextline);
2060                 debug_print("IMAP4< %s\n", nextline);
2061                 g_free(nextline);
2062
2063                 while (isspace(*cur_pos)) cur_pos++;
2064         }
2065
2066         return cur_pos;
2067 }
2068
2069 static MsgFlags imap_parse_flags(const gchar *flag_str)
2070 {
2071         const gchar *p = flag_str;
2072         MsgFlags flags = {0, 0};
2073
2074         flags.perm_flags = MSG_UNREAD;
2075
2076         while ((p = strchr(p, '\\')) != NULL) {
2077                 p++;
2078
2079                 if (g_strncasecmp(p, "Recent", 6) == 0 && MSG_IS_UNREAD(flags)) {
2080                         MSG_SET_PERM_FLAGS(flags, MSG_NEW);
2081                 } else if (g_strncasecmp(p, "Seen", 4) == 0) {
2082                         MSG_UNSET_PERM_FLAGS(flags, MSG_NEW|MSG_UNREAD);
2083                 } else if (g_strncasecmp(p, "Deleted", 7) == 0) {
2084                         MSG_SET_PERM_FLAGS(flags, MSG_DELETED);
2085                 } else if (g_strncasecmp(p, "Flagged", 7) == 0) {
2086                         MSG_SET_PERM_FLAGS(flags, MSG_MARKED);
2087                 } else if (g_strncasecmp(p, "Answered", 8) == 0) {
2088                         MSG_SET_PERM_FLAGS(flags, MSG_REPLIED);
2089                 }
2090         }
2091
2092         return flags;
2093 }
2094
2095 static MsgInfo *imap_parse_envelope(SockInfo *sock, FolderItem *item,
2096                                     GString *line_str)
2097 {
2098         gchar buf[IMAPBUFSIZE];
2099         MsgInfo *msginfo = NULL;
2100         gchar *cur_pos;
2101         gint msgnum;
2102         guint32 uid = 0;
2103         size_t size = 0;
2104         MsgFlags flags = {0, 0}, imap_flags = {0, 0};
2105
2106         g_return_val_if_fail(line_str != NULL, NULL);
2107         g_return_val_if_fail(line_str->str[0] == '*' &&
2108                              line_str->str[1] == ' ', NULL);
2109
2110         MSG_SET_TMP_FLAGS(flags, MSG_IMAP);
2111         if (item->stype == F_QUEUE) {
2112                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
2113         } else if (item->stype == F_DRAFT) {
2114                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
2115         }
2116
2117         cur_pos = line_str->str + 2;
2118
2119 #define PARSE_ONE_ELEMENT(ch)                                   \
2120 {                                                               \
2121         cur_pos = strchr_cpy(cur_pos, ch, buf, sizeof(buf));    \
2122         if (cur_pos == NULL) {                                  \
2123                 g_warning("cur_pos == NULL\n");                 \
2124                 procmsg_msginfo_free(msginfo);                  \
2125                 return NULL;                                    \
2126         }                                                       \
2127 }
2128
2129         PARSE_ONE_ELEMENT(' ');
2130         msgnum = atoi(buf);
2131
2132         PARSE_ONE_ELEMENT(' ');
2133         g_return_val_if_fail(!strcmp(buf, "FETCH"), NULL);
2134
2135         g_return_val_if_fail(*cur_pos == '(', NULL);
2136         cur_pos++;
2137
2138         while (*cur_pos != '\0' && *cur_pos != ')') {
2139                 while (*cur_pos == ' ') cur_pos++;
2140
2141                 if (!strncmp(cur_pos, "UID ", 4)) {
2142                         cur_pos += 4;
2143                         uid = strtoul(cur_pos, &cur_pos, 10);
2144                 } else if (!strncmp(cur_pos, "FLAGS ", 6)) {
2145                         cur_pos += 6;
2146                         if (*cur_pos != '(') {
2147                                 g_warning("*cur_pos != '('\n");
2148                                 procmsg_msginfo_free(msginfo);
2149                                 return NULL;
2150                         }
2151                         cur_pos++;
2152                         PARSE_ONE_ELEMENT(')');
2153                         imap_flags = imap_parse_flags(buf);
2154                 } else if (!strncmp(cur_pos, "RFC822.SIZE ", 12)) {
2155                         cur_pos += 12;
2156                         size = strtol(cur_pos, &cur_pos, 10);
2157                 } else if (!strncmp(cur_pos, "BODY[HEADER.FIELDS ", 19)) {
2158                         gchar *headers;
2159
2160                         cur_pos += 19;
2161                         if (*cur_pos != '(') {
2162                                 g_warning("*cur_pos != '('\n");
2163                                 procmsg_msginfo_free(msginfo);
2164                                 return NULL;
2165                         }
2166                         cur_pos++;
2167                         PARSE_ONE_ELEMENT(')');
2168                         if (*cur_pos != ']') {
2169                                 g_warning("*cur_pos != ']'\n");
2170                                 procmsg_msginfo_free(msginfo);
2171                                 return NULL;
2172                         }
2173                         cur_pos++;
2174
2175                         cur_pos = imap_get_header(sock, cur_pos, &headers,
2176                                                   line_str);
2177                         msginfo = procheader_parse_str(headers, flags, FALSE, FALSE);
2178                         g_free(headers);
2179                 } else {
2180                         g_warning("invalid FETCH response: %s\n", cur_pos);
2181                         break;
2182                 }
2183         }
2184
2185         if (msginfo) {
2186                 msginfo->msgnum = uid;
2187                 msginfo->size = size;
2188                 msginfo->flags.tmp_flags |= imap_flags.tmp_flags;
2189                 msginfo->flags.perm_flags = imap_flags.perm_flags;
2190         }
2191
2192         return msginfo;
2193 }
2194
2195 gint imap_msg_set_perm_flags(MsgInfo *msginfo, MsgPermFlags flags)
2196 {
2197         Folder *folder;
2198         IMAPSession *session;
2199         IMAPFlags iflags = 0;
2200         gint ok = IMAP_SUCCESS;
2201
2202         g_return_val_if_fail(msginfo != NULL, -1);
2203         g_return_val_if_fail(msginfo->folder != NULL, -1);
2204         g_return_val_if_fail(msginfo->folder->folder != NULL, -1);
2205
2206         folder = msginfo->folder->folder;
2207         g_return_val_if_fail(FOLDER_TYPE(folder) == F_IMAP, -1);
2208
2209         session = imap_session_get(folder);
2210         if (!session) return -1;
2211
2212         if ((ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder->path,
2213             NULL, NULL, NULL, NULL)) != IMAP_SUCCESS)
2214                 return ok;
2215
2216         if (flags & MSG_MARKED)  iflags |= IMAP_FLAG_FLAGGED;
2217         if (flags & MSG_REPLIED) iflags |= IMAP_FLAG_ANSWERED;
2218         if (iflags) {
2219                 ok = imap_set_message_flags(session, msginfo->msgnum,
2220                                             msginfo->msgnum, iflags, TRUE);
2221                 if (ok != IMAP_SUCCESS) return ok;
2222         }
2223
2224         if (flags & MSG_UNREAD)
2225                 ok = imap_set_message_flags(session, msginfo->msgnum,
2226                                             msginfo->msgnum, IMAP_FLAG_SEEN,
2227                                             FALSE);
2228         return ok;
2229 }
2230
2231 gint imap_msg_unset_perm_flags(MsgInfo *msginfo, MsgPermFlags flags)
2232 {
2233         Folder *folder;
2234         IMAPSession *session;
2235         IMAPFlags iflags = 0;
2236         gint ok = IMAP_SUCCESS;
2237
2238         g_return_val_if_fail(msginfo != NULL, -1);
2239         g_return_val_if_fail(msginfo->folder != NULL, -1);
2240         g_return_val_if_fail(msginfo->folder->folder != NULL, -1);
2241
2242         folder = msginfo->folder->folder;
2243         g_return_val_if_fail(FOLDER_TYPE(folder) == F_IMAP, -1);
2244
2245         session = imap_session_get(folder);
2246         if (!session) return -1;
2247
2248         if (flags & MSG_MARKED)  iflags |= IMAP_FLAG_FLAGGED;
2249         if (flags & MSG_REPLIED) iflags |= IMAP_FLAG_ANSWERED;
2250         if (iflags) {
2251                 ok = imap_set_message_flags(session, msginfo->msgnum,
2252                                             msginfo->msgnum, iflags, FALSE);
2253                 if (ok != IMAP_SUCCESS) return ok;
2254         }
2255
2256         if (flags & MSG_UNREAD)
2257                 ok = imap_set_message_flags(session, msginfo->msgnum,
2258                                             msginfo->msgnum, IMAP_FLAG_SEEN,
2259                                             TRUE);
2260         return ok;
2261 }
2262
2263 static gint imap_set_message_flags(IMAPSession *session,
2264                                    guint32 first_uid,
2265                                    guint32 last_uid,
2266                                    IMAPFlags flags,
2267                                    gboolean is_set)
2268 {
2269         GString *buf;
2270         gint ok;
2271
2272         buf = g_string_new(is_set ? "+FLAGS (" : "-FLAGS (");
2273
2274         if (IMAP_IS_SEEN(flags))        g_string_append(buf, "\\Seen ");
2275         if (IMAP_IS_ANSWERED(flags))    g_string_append(buf, "\\Answered ");
2276         if (IMAP_IS_FLAGGED(flags))     g_string_append(buf, "\\Flagged ");
2277         if (IMAP_IS_DELETED(flags))     g_string_append(buf, "\\Deleted ");
2278         if (IMAP_IS_DRAFT(flags))       g_string_append(buf, "\\Draft");
2279
2280         if (buf->str[buf->len - 1] == ' ')
2281                 g_string_truncate(buf, buf->len - 1);
2282
2283         g_string_append_c(buf, ')');
2284
2285         ok = imap_cmd_store(SESSION(session)->sock, first_uid, last_uid,
2286                             buf->str);
2287         g_string_free(buf, TRUE);
2288
2289         return ok;
2290 }
2291
2292 static gint imap_select(IMAPSession *session, IMAPFolder *folder,
2293                         const gchar *path,
2294                         gint *exists, gint *recent, gint *unseen,
2295                         guint32 *uid_validity)
2296 {
2297         gchar *real_path;
2298         gint ok;
2299         gint exists_, recent_, unseen_, uid_validity_;
2300
2301         if (!exists || !recent || !unseen || !uid_validity) {
2302                 if (session->mbox && strcmp(session->mbox, path) == 0)
2303                         return IMAP_SUCCESS;
2304                 exists = &exists_;
2305                 recent = &recent_;
2306                 unseen = &unseen_;
2307                 uid_validity = &uid_validity_;
2308         }
2309
2310         g_free(session->mbox);
2311         session->mbox = NULL;
2312
2313         real_path = imap_get_real_path(folder, path);
2314         ok = imap_cmd_select(SESSION(session)->sock, real_path,
2315                              exists, recent, unseen, uid_validity);
2316         if (ok != IMAP_SUCCESS)
2317                 log_warning(_("can't select folder: %s\n"), real_path);
2318         else
2319                 session->mbox = g_strdup(path);
2320         g_free(real_path);
2321
2322         return ok;
2323 }
2324
2325 #define THROW(err) { ok = err; goto catch; }
2326
2327 static gint imap_status(IMAPSession *session, IMAPFolder *folder,
2328                         const gchar *path,
2329                         gint *messages, gint *recent,
2330                         guint32 *uid_next, guint32 *uid_validity,
2331                         gint *unseen)
2332 {
2333         gchar *real_path;
2334         gchar *real_path_;
2335         gint ok;
2336         GPtrArray *argbuf;
2337         gchar *str;
2338
2339         *messages = *recent = *uid_next = *uid_validity = *unseen = 0;
2340
2341         argbuf = g_ptr_array_new();
2342
2343         real_path = imap_get_real_path(folder, path);
2344         QUOTE_IF_REQUIRED(real_path_, real_path);
2345         imap_cmd_gen_send(SESSION(session)->sock, "STATUS %s "
2346                           "(MESSAGES RECENT UIDNEXT UIDVALIDITY UNSEEN)",
2347                           real_path_);
2348
2349         ok = imap_cmd_ok(SESSION(session)->sock, argbuf);
2350         if (ok != IMAP_SUCCESS) THROW(ok);
2351
2352         str = search_array_str(argbuf, "STATUS");
2353         if (!str) THROW(IMAP_ERROR);
2354
2355         str = strchr(str, '(');
2356         if (!str) THROW(IMAP_ERROR);
2357         str++;
2358         while (*str != '\0' && *str != ')') {
2359                 while (*str == ' ') str++;
2360
2361                 if (!strncmp(str, "MESSAGES ", 9)) {
2362                         str += 9;
2363                         *messages = strtol(str, &str, 10);
2364                 } else if (!strncmp(str, "RECENT ", 7)) {
2365                         str += 7;
2366                         *recent = strtol(str, &str, 10);
2367                 } else if (!strncmp(str, "UIDNEXT ", 8)) {
2368                         str += 8;
2369                         *uid_next = strtoul(str, &str, 10);
2370                 } else if (!strncmp(str, "UIDVALIDITY ", 12)) {
2371                         str += 12;
2372                         *uid_validity = strtoul(str, &str, 10);
2373                 } else if (!strncmp(str, "UNSEEN ", 7)) {
2374                         str += 7;
2375                         *unseen = strtol(str, &str, 10);
2376                 } else {
2377                         g_warning("invalid STATUS response: %s\n", str);
2378                         break;
2379                 }
2380         }
2381
2382 catch:
2383         g_free(real_path);
2384         ptr_array_free_strings(argbuf);
2385         g_ptr_array_free(argbuf, TRUE);
2386
2387         return ok;
2388 }
2389
2390 #undef THROW
2391
2392
2393 /* low-level IMAP4rev1 commands */
2394
2395 static gint imap_cmd_login(SockInfo *sock,
2396                            const gchar *user, const gchar *pass)
2397 {
2398         gchar *user_, *pass_;
2399         gint ok;
2400
2401         QUOTE_IF_REQUIRED(user_, user);
2402         QUOTE_IF_REQUIRED(pass_, pass);
2403         imap_cmd_gen_send(sock, "LOGIN %s %s", user_, pass_);
2404
2405         ok = imap_cmd_ok(sock, NULL);
2406         if (ok != IMAP_SUCCESS)
2407                 log_warning(_("IMAP4 login failed.\n"));
2408
2409         return ok;
2410 }
2411
2412 static gint imap_cmd_logout(SockInfo *sock)
2413 {
2414         imap_cmd_gen_send(sock, "LOGOUT");
2415         return imap_cmd_ok(sock, NULL);
2416 }
2417
2418 /* Send a NOOP, and examine the server's response to see whether this
2419  * connection is pre-authenticated or not. */
2420 static gint imap_greeting(SockInfo *sock, gboolean *is_preauth)
2421 {
2422         GPtrArray *argbuf;
2423         gint r;
2424
2425         imap_cmd_gen_send(sock, "NOOP");
2426         argbuf = g_ptr_array_new(); /* will hold messages sent back */
2427         r = imap_cmd_ok(sock, argbuf);
2428         *is_preauth = search_array_str(argbuf, "PREAUTH") != NULL;
2429
2430         ptr_array_free_strings(argbuf);
2431         g_ptr_array_free(argbuf, TRUE);
2432
2433         return r;
2434 }
2435
2436 static void imap_get_capability(Session *session)
2437 {
2438         gchar *capstr;
2439         GPtrArray *argbuf;
2440
2441         if (IMAP_SESSION(session)->capability != NULL)
2442                 return;
2443
2444         imap_cmd_gen_send(session->sock, "CAPABILITY");
2445
2446         argbuf = g_ptr_array_new();
2447
2448         if (imap_cmd_ok(session->sock, argbuf) != IMAP_SUCCESS ||
2449             ((capstr = search_array_str(argbuf, "CAPABILITY ")) == NULL)) {
2450                 ptr_array_free_strings(argbuf);
2451                 g_ptr_array_free(argbuf, TRUE);
2452                 return;
2453         }
2454
2455         capstr += strlen("CAPABILITY ");
2456
2457         IMAP_SESSION(session)->capability = g_strsplit(capstr, " ", 0);
2458
2459         ptr_array_free_strings(argbuf);
2460         g_ptr_array_free(argbuf, TRUE);
2461 }
2462
2463 static gboolean imap_has_capability(IMAPSession *session, const gchar *cap)
2464 {
2465         gchar **p;
2466
2467         for (p = session->capability; *p != NULL; ++p)
2468                 if (g_strcasecmp(*p, cap) == 0)
2469                         return TRUE;
2470
2471         return FALSE;
2472 }
2473
2474 static gint imap_cmd_noop(SockInfo *sock)
2475 {
2476         imap_cmd_gen_send(sock, "NOOP");
2477         return imap_cmd_ok(sock, NULL);
2478 }
2479
2480 static gint imap_cmd_starttls(SockInfo *sock)
2481 {
2482         imap_cmd_gen_send(sock, "STARTTLS");
2483         return imap_cmd_ok(sock, NULL);
2484 }
2485
2486 #define THROW(err) { ok = err; goto catch; }
2487
2488 static gint imap_cmd_namespace(SockInfo *sock, gchar **ns_str)
2489 {
2490         gint ok;
2491         GPtrArray *argbuf;
2492         gchar *str;
2493
2494         argbuf = g_ptr_array_new();
2495
2496         imap_cmd_gen_send(sock, "NAMESPACE");
2497         if ((ok = imap_cmd_ok(sock, argbuf)) != IMAP_SUCCESS) THROW(ok);
2498
2499         str = search_array_str(argbuf, "NAMESPACE");
2500         if (!str) THROW(IMAP_ERROR);
2501
2502         *ns_str = g_strdup(str);
2503
2504 catch:
2505         ptr_array_free_strings(argbuf);
2506         g_ptr_array_free(argbuf, TRUE);
2507
2508         return ok;
2509 }
2510
2511 #undef THROW
2512
2513 static gint imap_cmd_list(SockInfo *sock, const gchar *ref,
2514                           const gchar *mailbox, GPtrArray *argbuf)
2515 {
2516         gchar *ref_, *mailbox_;
2517
2518         if (!ref) ref = "\"\"";
2519         if (!mailbox) mailbox = "\"\"";
2520
2521         QUOTE_IF_REQUIRED(ref_, ref);
2522         QUOTE_IF_REQUIRED(mailbox_, mailbox);
2523         imap_cmd_gen_send(sock, "LIST %s %s", ref_, mailbox_);
2524
2525         return imap_cmd_ok(sock, argbuf);
2526 }
2527
2528 #define THROW goto catch
2529
2530 static gint imap_cmd_do_select(SockInfo *sock, const gchar *folder,
2531                                gboolean examine,
2532                                gint *exists, gint *recent, gint *unseen,
2533                                guint32 *uid_validity)
2534 {
2535         gint ok;
2536         gchar *resp_str;
2537         GPtrArray *argbuf;
2538         gchar *select_cmd;
2539         gchar *folder_;
2540
2541         *exists = *recent = *unseen = *uid_validity = 0;
2542         argbuf = g_ptr_array_new();
2543
2544         if (examine)
2545                 select_cmd = "EXAMINE";
2546         else
2547                 select_cmd = "SELECT";
2548
2549         QUOTE_IF_REQUIRED(folder_, folder);
2550         imap_cmd_gen_send(sock, "%s %s", select_cmd, folder_);
2551
2552         if ((ok = imap_cmd_ok(sock, argbuf)) != IMAP_SUCCESS) THROW;
2553
2554         resp_str = search_array_contain_str(argbuf, "EXISTS");
2555         if (resp_str) {
2556                 if (sscanf(resp_str,"%d EXISTS", exists) != 1) {
2557                         g_warning("imap_cmd_select(): invalid EXISTS line.\n");
2558                         THROW;
2559                 }
2560         }
2561
2562         resp_str = search_array_contain_str(argbuf, "RECENT");
2563         if (resp_str) {
2564                 if (sscanf(resp_str, "%d RECENT", recent) != 1) {
2565                         g_warning("imap_cmd_select(): invalid RECENT line.\n");
2566                         THROW;
2567                 }
2568         }
2569
2570         resp_str = search_array_contain_str(argbuf, "UIDVALIDITY");
2571         if (resp_str) {
2572                 if (sscanf(resp_str, "OK [UIDVALIDITY %u] ", uid_validity)
2573                     != 1) {
2574                         g_warning("imap_cmd_select(): invalid UIDVALIDITY line.\n");
2575                         THROW;
2576                 }
2577         }
2578
2579         resp_str = search_array_contain_str(argbuf, "UNSEEN");
2580         if (resp_str) {
2581                 if (sscanf(resp_str, "OK [UNSEEN %d] ", unseen) != 1) {
2582                         g_warning("imap_cmd_select(): invalid UNSEEN line.\n");
2583                         THROW;
2584                 }
2585         }
2586
2587 catch:
2588         ptr_array_free_strings(argbuf);
2589         g_ptr_array_free(argbuf, TRUE);
2590
2591         return ok;
2592 }
2593
2594 static gint imap_cmd_select(SockInfo *sock, const gchar *folder,
2595                             gint *exists, gint *recent, gint *unseen,
2596                             guint32 *uid_validity)
2597 {
2598         return imap_cmd_do_select(sock, folder, FALSE,
2599                                   exists, recent, unseen, uid_validity);
2600 }
2601
2602 static gint imap_cmd_examine(SockInfo *sock, const gchar *folder,
2603                              gint *exists, gint *recent, gint *unseen,
2604                              guint32 *uid_validity)
2605 {
2606         return imap_cmd_do_select(sock, folder, TRUE,
2607                                   exists, recent, unseen, uid_validity);
2608 }
2609
2610 #undef THROW
2611
2612 static gint imap_cmd_create(SockInfo *sock, const gchar *folder)
2613 {
2614         gchar *folder_;
2615
2616         QUOTE_IF_REQUIRED(folder_, folder);
2617         imap_cmd_gen_send(sock, "CREATE %s", folder_);
2618
2619         return imap_cmd_ok(sock, NULL);
2620 }
2621
2622 static gint imap_cmd_rename(SockInfo *sock, const gchar *old_folder,
2623                             const gchar *new_folder)
2624 {
2625         gchar *old_folder_, *new_folder_;
2626
2627         QUOTE_IF_REQUIRED(old_folder_, old_folder);
2628         QUOTE_IF_REQUIRED(new_folder_, new_folder);
2629         imap_cmd_gen_send(sock, "RENAME %s %s", old_folder_, new_folder_);
2630
2631         return imap_cmd_ok(sock, NULL);
2632 }
2633
2634 static gint imap_cmd_delete(SockInfo *sock, const gchar *folder)
2635 {
2636         gchar *folder_;
2637
2638         QUOTE_IF_REQUIRED(folder_, folder);
2639         imap_cmd_gen_send(sock, "DELETE %s", folder_);
2640
2641         return imap_cmd_ok(sock, NULL);
2642 }
2643
2644 static gint imap_cmd_search(SockInfo *sock, const gchar *criteria, GSList **list)
2645 {
2646         gint ok;
2647         gchar *uidlist;
2648         GPtrArray *argbuf;
2649
2650         g_return_val_if_fail(criteria != NULL, IMAP_ERROR);
2651         g_return_val_if_fail(list != NULL, IMAP_ERROR);
2652
2653         *list = NULL;
2654
2655         argbuf = g_ptr_array_new();
2656         imap_cmd_gen_send(sock, "UID SEARCH %s", criteria);
2657
2658         ok = imap_cmd_ok(sock, argbuf);
2659         if (ok != IMAP_SUCCESS) {
2660                 ptr_array_free_strings(argbuf);
2661                 g_ptr_array_free(argbuf, TRUE);
2662                 return ok;
2663         }
2664
2665         if ((uidlist = search_array_str(argbuf, "SEARCH ")) != NULL) {
2666                 gchar **strlist, **p;
2667
2668                 strlist = g_strsplit(uidlist + 7, " ", 0);
2669                 for (p = strlist; *p != NULL; ++p) {
2670                         guint msgnum;
2671
2672                         if (sscanf(*p, "%d", &msgnum) == 1)
2673                                 *list = g_slist_append(*list, GINT_TO_POINTER(msgnum));
2674                 }
2675                 g_strfreev(strlist);
2676         }
2677         ptr_array_free_strings(argbuf);
2678         g_ptr_array_free(argbuf, TRUE);
2679
2680         return IMAP_SUCCESS;
2681 }
2682
2683 static gint imap_cmd_fetch(SockInfo *sock, guint32 uid, const gchar *filename)
2684 {
2685         gint ok;
2686         gchar *buf;
2687         gchar *cur_pos;
2688         gchar size_str[32];
2689         glong size_num;
2690
2691         g_return_val_if_fail(filename != NULL, IMAP_ERROR);
2692
2693         imap_cmd_gen_send(sock, "UID FETCH %d BODY[]", uid);
2694
2695         while ((ok = imap_cmd_gen_recv(sock, &buf))
2696                == IMAP_SUCCESS) {
2697                 if (buf[0] != '*' || buf[1] != ' ') {
2698                         g_free(buf);
2699                         return IMAP_ERROR;
2700                 }
2701                 if (strstr(buf, "FETCH") != NULL)
2702                         break;
2703         }
2704         if (ok != IMAP_SUCCESS)
2705                 return ok;
2706
2707         cur_pos = strchr(buf, '{');
2708         if (cur_pos == NULL) {
2709                 g_free(buf);
2710                 return IMAP_ERROR;
2711         }
2712         cur_pos = strchr_cpy(cur_pos + 1, '}', size_str, sizeof(size_str));
2713         if (cur_pos == NULL) {
2714                 g_free(buf);
2715                 return IMAP_ERROR;
2716         }
2717         size_num = atol(size_str);
2718
2719         if (*cur_pos != '\0') {
2720                 g_free(buf);
2721                 return IMAP_ERROR;
2722         }
2723
2724         if (recv_bytes_write_to_file(sock, size_num, filename) != 0) {
2725                 g_free(buf);
2726                 return IMAP_ERROR;
2727         }
2728
2729         if (imap_cmd_gen_recv(sock, &buf) != IMAP_SUCCESS) {
2730                 g_free(buf);
2731                 return IMAP_ERROR;
2732         }
2733
2734         if (buf[0] == '\0' || buf[strlen(buf) - 1] != ')') {
2735                 g_free(buf);
2736                 return IMAP_ERROR;
2737         }
2738
2739         g_free(buf);
2740         ok = imap_cmd_ok(sock, NULL);
2741
2742         return ok;
2743 }
2744
2745 static gint imap_cmd_append(SockInfo *sock, const gchar *destfolder,
2746                             const gchar *file)
2747 {
2748         gint ok;
2749         gint size;
2750         gchar *destfolder_;
2751         gchar buf[BUFFSIZE], *imapbuf;
2752         FILE *fp;
2753
2754         g_return_val_if_fail(file != NULL, IMAP_ERROR);
2755
2756         size = get_file_size_as_crlf(file);
2757         if ((fp = fopen(file, "rb")) == NULL) {
2758                 FILE_OP_ERROR(file, "fopen");
2759                 return -1;
2760         }
2761         QUOTE_IF_REQUIRED(destfolder_, destfolder);
2762         imap_cmd_gen_send(sock, "APPEND %s (\\Seen) {%d}", destfolder_, size);
2763
2764         ok = imap_cmd_gen_recv(sock, &imapbuf);
2765         if (ok != IMAP_SUCCESS || imapbuf[0] != '+' || imapbuf[1] != ' ') {
2766                 log_warning(_("can't append %s to %s\n"), file, destfolder_);
2767                 g_free(imapbuf);
2768                 fclose(fp);
2769                 return IMAP_ERROR;
2770         }
2771         g_free(imapbuf);
2772
2773         log_print("IMAP4> %s\n", _("(sending file...)"));
2774
2775         while (fgets(buf, sizeof(buf), fp) != NULL) {
2776                 strretchomp(buf);
2777                 if (sock_puts(sock, buf) < 0) {
2778                         fclose(fp);
2779                         sock_close(sock);
2780                         return -1;
2781                 }
2782         }
2783
2784         if (ferror(fp)) {
2785                 FILE_OP_ERROR(file, "fgets");
2786                 fclose(fp);
2787                 sock_close(sock);
2788                 return -1;
2789         }
2790
2791         sock_puts(sock, "");
2792
2793         fclose(fp);
2794         return imap_cmd_ok(sock, NULL);
2795 }
2796
2797 #if 0
2798 static void imap_uidplus_copy(IMAPSession *session, MsgInfo *msginfo,
2799                                 const gchar *destfolder, const gchar *okmsginfo)
2800 {
2801         unsigned int olduid, newuid;
2802         IMAPFlags iflags = 0;
2803
2804         if (okmsginfo == NULL)
2805                 return;
2806
2807         if (sscanf(okmsginfo, "%*u OK [COPYUID %*llu %u %u]", &olduid, &newuid) != 2)
2808                 return;
2809
2810         if (olduid != msginfo->msgnum)  /* this should NEVER happen */
2811                 return;
2812
2813         if (imap_select(session, IMAP_FOLDER(msginfo->folder->folder), destfolder,
2814                         NULL, NULL, NULL, NULL) != IMAP_SUCCESS)
2815                 return;
2816
2817         if (msginfo->flags.perm_flags & MSG_MARKED)  iflags |= IMAP_FLAG_FLAGGED;
2818         if (msginfo->flags.perm_flags & MSG_REPLIED) iflags |= IMAP_FLAG_ANSWERED;
2819         if (iflags)
2820                 imap_set_message_flags(session, newuid, newuid, iflags, TRUE);
2821
2822         if (msginfo->flags.perm_flags & MSG_UNREAD)
2823                 imap_set_message_flags(session, newuid, newuid, IMAP_FLAG_SEEN, FALSE);
2824
2825         imap_select(session, IMAP_FOLDER(msginfo->folder->folder), msginfo->folder->path,
2826                     NULL, NULL, NULL, NULL);
2827 }
2828 #endif
2829
2830 static gint imap_cmd_copy(IMAPSession *session,
2831     gint32 msgnum, const gchar *destfolder, gint32 *new_uid)
2832 {
2833         gint ok;
2834         gint32 olduid, newuid;
2835         gchar *okmsginfo;
2836         gchar *destfolder_;
2837         GPtrArray *reply;
2838
2839         g_return_val_if_fail(destfolder != NULL, IMAP_ERROR);
2840         g_return_val_if_fail(session != NULL, IMAP_ERROR);
2841         g_return_val_if_fail(new_uid != NULL, IMAP_ERROR);
2842
2843         QUOTE_IF_REQUIRED(destfolder_, destfolder);
2844         imap_cmd_gen_send(SESSION(session)->sock, "UID COPY %d %s", msgnum, destfolder_);
2845
2846         reply = g_ptr_array_new();
2847
2848         ok = imap_cmd_ok(SESSION(session)->sock, reply);
2849         if (ok != IMAP_SUCCESS)
2850                 log_warning(_("can't copy %d to %s\n"), msgnum, destfolder_);
2851         else if (imap_has_capability(session, "UIDPLUS") && reply->len > 0)
2852                 if ((okmsginfo = g_ptr_array_index(reply, reply->len - 1)) != NULL &&
2853                     sscanf(okmsginfo, "%*u OK [COPYUID %*u %u %u]", &olduid, &newuid) == 2 &&
2854                     olduid == msgnum)
2855                         *new_uid = newuid;
2856
2857         ptr_array_free_strings(reply);
2858         g_ptr_array_free(reply, TRUE);
2859         return ok;
2860 }
2861
2862 gint imap_cmd_envelope(SockInfo *sock, guint32 first_uid, guint32 last_uid)
2863 {
2864         static GString *header_fields = NULL;
2865
2866         if (header_fields == NULL) {
2867                 const HeaderEntry *headers, *elem;
2868
2869                 headers = procheader_get_headernames(FALSE);
2870                 header_fields = g_string_new("");
2871
2872                 for (elem = headers; elem->name != NULL; ++elem) {
2873                         gint namelen = strlen(elem->name);
2874
2875                         /* Header fields ending with space are not rfc822 headers */
2876                         if (elem->name[namelen - 1] == ' ')
2877                                 continue;
2878
2879                         /* strip : at the of header field */
2880                         if(elem->name[namelen - 1] == ':')
2881                                 namelen--;
2882
2883                         if (namelen <= 0)
2884                                 continue;
2885
2886                         g_string_sprintfa(header_fields, "%s%.*s",
2887                                         header_fields->str[0] != '\0' ? " " : "",
2888                                         namelen, elem->name);
2889                 }
2890         }
2891
2892         imap_cmd_gen_send
2893                 (sock, "UID FETCH %d:%d (UID FLAGS RFC822.SIZE BODY.PEEK[HEADER.FIELDS (%s)])",
2894                  first_uid, last_uid,
2895                  header_fields->str);
2896
2897         return IMAP_SUCCESS;
2898 }
2899
2900 static gint imap_cmd_store(SockInfo *sock, guint32 first_uid, guint32 last_uid,
2901                            gchar *sub_cmd)
2902 {
2903         gint ok;
2904
2905         imap_cmd_gen_send(sock, "UID STORE %d:%d %s",
2906                           first_uid, last_uid, sub_cmd);
2907
2908         if ((ok = imap_cmd_ok(sock, NULL)) != IMAP_SUCCESS) {
2909                 log_warning(_("error while imap command: STORE %d:%d %s\n"),
2910                             first_uid, last_uid, sub_cmd);
2911                 return ok;
2912         }
2913
2914         return IMAP_SUCCESS;
2915 }
2916
2917 static gint imap_cmd_expunge(SockInfo *sock)
2918 {
2919         gint ok;
2920
2921         imap_cmd_gen_send(sock, "EXPUNGE");
2922         if ((ok = imap_cmd_ok(sock, NULL)) != IMAP_SUCCESS) {
2923                 log_warning(_("error while imap command: EXPUNGE\n"));
2924                 return ok;
2925         }
2926
2927         return IMAP_SUCCESS;
2928 }
2929
2930 static gint imap_cmd_ok(SockInfo *sock, GPtrArray *argbuf)
2931 {
2932         gint ok;
2933         gchar *buf;
2934         gint cmd_num;
2935         gchar cmd_status[IMAPBUFSIZE];
2936
2937         while ((ok = imap_cmd_gen_recv(sock, &buf))
2938                == IMAP_SUCCESS) {
2939                 if (buf[0] == '*' && buf[1] == ' ') {
2940                         if (argbuf)
2941                                 g_ptr_array_add(argbuf, g_strdup(buf + 2));
2942                         continue;
2943                 }
2944
2945                 if (sscanf(buf, "%d %s", &cmd_num, cmd_status) < 2)
2946                         return IMAP_ERROR;
2947                 else if (cmd_num == imap_cmd_count &&
2948                          !strcmp(cmd_status, "OK")) {
2949                         if (argbuf)
2950                                 g_ptr_array_add(argbuf, g_strdup(buf));
2951                         g_free(buf);
2952                         return IMAP_SUCCESS;
2953                 } else {
2954                         g_free(buf);
2955                         return IMAP_ERROR;
2956                 }
2957         }
2958         g_free(buf);
2959
2960         return ok;
2961 }
2962
2963 static void imap_cmd_gen_send(SockInfo *sock, const gchar *format, ...)
2964 {
2965         gchar buf[IMAPBUFSIZE];
2966         gchar tmp[IMAPBUFSIZE];
2967         gchar *p;
2968         va_list args;
2969
2970         va_start(args, format);
2971         g_vsnprintf(tmp, sizeof(tmp), format, args);
2972         va_end(args);
2973
2974         imap_cmd_count++;
2975
2976         g_snprintf(buf, sizeof(buf), "%d %s\r\n", imap_cmd_count, tmp);
2977         if (!strncasecmp(tmp, "LOGIN ", 6) && (p = strchr(tmp + 6, ' '))) {
2978                 *p = '\0';
2979                 log_print("IMAP4> %d %s ********\n", imap_cmd_count, tmp);
2980         } else
2981                 log_print("IMAP4> %d %s\n", imap_cmd_count, tmp);
2982
2983         sock_write(sock, buf, strlen(buf));
2984 }
2985
2986 static gint imap_cmd_gen_recv(SockInfo *sock, gchar **buf)
2987 {
2988         if ((*buf = sock_getline(sock)) == NULL)
2989                 return IMAP_SOCKET;
2990
2991         strretchomp(*buf);
2992
2993         log_print("IMAP4< %s\n", *buf);
2994
2995         return IMAP_SUCCESS;
2996 }
2997
2998
2999 /* misc utility functions */
3000
3001 static gchar *strchr_cpy(const gchar *src, gchar ch, gchar *dest, gint len)
3002 {
3003         gchar *tmp;
3004
3005         dest[0] = '\0';
3006         tmp = strchr(src, ch);
3007         if (!tmp)
3008                 return NULL;
3009
3010         memcpy(dest, src, MIN(tmp - src, len - 1));
3011         dest[MIN(tmp - src, len - 1)] = '\0';
3012
3013         return tmp + 1;
3014 }
3015
3016 static gchar *get_quoted(const gchar *src, gchar ch, gchar *dest, gint len)
3017 {
3018         const gchar *p = src;
3019         gint n = 0;
3020
3021         g_return_val_if_fail(*p == ch, NULL);
3022
3023         *dest = '\0';
3024         p++;
3025
3026         while (*p != '\0' && *p != ch) {
3027                 if (n < len - 1) {
3028                         if (*p == '\\' && *(p + 1) != '\0')
3029                                 p++;
3030                         *dest++ = *p++;
3031                 } else
3032                         p++;
3033                 n++;
3034         }
3035
3036         *dest = '\0';
3037         return (gchar *)(*p == ch ? p + 1 : p);
3038 }
3039
3040 static gchar *search_array_contain_str(GPtrArray *array, const gchar *str)
3041 {
3042         gint i;
3043
3044         for (i = 0; i < array->len; i++) {
3045                 gchar *tmp;
3046
3047                 tmp = g_ptr_array_index(array, i);
3048                 if (strstr(tmp, str) != NULL)
3049                         return tmp;
3050         }
3051
3052         return NULL;
3053 }
3054
3055 static gchar *search_array_str(GPtrArray *array, const gchar *str)
3056 {
3057         gint i;
3058         gint len;
3059
3060         len = strlen(str);
3061
3062         for (i = 0; i < array->len; i++) {
3063                 gchar *tmp;
3064
3065                 tmp = g_ptr_array_index(array, i);
3066                 if (!strncmp(tmp, str, len))
3067                         return tmp;
3068         }
3069
3070         return NULL;
3071 }
3072
3073 static void imap_path_separator_subst(gchar *str, gchar separator)
3074 {
3075         gchar *p;
3076         gboolean in_escape = FALSE;
3077
3078         if (!separator || separator == '/') return;
3079
3080         for (p = str; *p != '\0'; p++) {
3081                 if (*p == '/' && !in_escape)
3082                         *p = separator;
3083                 else if (*p == '&' && *(p + 1) != '-' && !in_escape)
3084                         in_escape = TRUE;
3085                 else if (*p == '-' && in_escape)
3086                         in_escape = FALSE;
3087         }
3088 }
3089
3090 static gchar *imap_modified_utf7_to_locale(const gchar *mutf7_str)
3091 {
3092 #if !HAVE_ICONV
3093         return g_strdup(mutf7_str);
3094 #else
3095         static iconv_t cd = (iconv_t)-1;
3096         static gboolean iconv_ok = TRUE;
3097         GString *norm_utf7;
3098         gchar *norm_utf7_p;
3099         size_t norm_utf7_len;
3100         const gchar *p;
3101         gchar *to_str, *to_p;
3102         size_t to_len;
3103         gboolean in_escape = FALSE;
3104
3105         if (!iconv_ok) return g_strdup(mutf7_str);
3106
3107         if (cd == (iconv_t)-1) {
3108                 cd = iconv_open(conv_get_current_charset_str(), "UTF-7");
3109                 if (cd == (iconv_t)-1) {
3110                         g_warning("iconv cannot convert UTF-7 to %s\n",
3111                                   conv_get_current_charset_str());
3112                         iconv_ok = FALSE;
3113                         return g_strdup(mutf7_str);
3114                 }
3115         }
3116
3117         norm_utf7 = g_string_new(NULL);
3118
3119         for (p = mutf7_str; *p != '\0'; p++) {
3120                 /* replace: '&'  -> '+',
3121                             "&-" -> '&',
3122                             escaped ','  -> '/' */
3123                 if (!in_escape && *p == '&') {
3124                         if (*(p + 1) != '-') {
3125                                 g_string_append_c(norm_utf7, '+');
3126                                 in_escape = TRUE;
3127                         } else {
3128                                 g_string_append_c(norm_utf7, '&');
3129                                 p++;
3130                         }
3131                 } else if (in_escape && *p == ',') {
3132                         g_string_append_c(norm_utf7, '/');
3133                 } else if (in_escape && *p == '-') {
3134                         g_string_append_c(norm_utf7, '-');
3135                         in_escape = FALSE;
3136                 } else {
3137                         g_string_append_c(norm_utf7, *p);
3138                 }
3139         }
3140
3141         norm_utf7_p = norm_utf7->str;
3142         norm_utf7_len = norm_utf7->len;
3143         to_len = strlen(mutf7_str) * 5;
3144         to_p = to_str = g_malloc(to_len + 1);
3145
3146         if (iconv(cd, (ICONV_CONST gchar **)&norm_utf7_p, &norm_utf7_len,
3147                   &to_p, &to_len) == -1) {
3148                 g_warning(_("iconv cannot convert UTF-7 to %s\n"),
3149                           conv_get_current_charset_str());
3150                 g_string_free(norm_utf7, TRUE);
3151                 g_free(to_str);
3152                 return g_strdup(mutf7_str);
3153         }
3154
3155         /* second iconv() call for flushing */
3156         iconv(cd, NULL, NULL, &to_p, &to_len);
3157         g_string_free(norm_utf7, TRUE);
3158         *to_p = '\0';
3159
3160         return to_str;
3161 #endif /* !HAVE_ICONV */
3162 }
3163
3164 static gchar *imap_locale_to_modified_utf7(const gchar *from)
3165 {
3166 #if !HAVE_ICONV
3167         return g_strdup(from);
3168 #else
3169         static iconv_t cd = (iconv_t)-1;
3170         static gboolean iconv_ok = TRUE;
3171         gchar *norm_utf7, *norm_utf7_p;
3172         size_t from_len, norm_utf7_len;
3173         GString *to_str;
3174         gchar *from_tmp, *to, *p;
3175         gboolean in_escape = FALSE;
3176
3177         if (!iconv_ok) return g_strdup(from);
3178
3179         if (cd == (iconv_t)-1) {
3180                 cd = iconv_open("UTF-7", conv_get_current_charset_str());
3181                 if (cd == (iconv_t)-1) {
3182                         g_warning("iconv cannot convert %s to UTF-7\n",
3183                                   conv_get_current_charset_str());
3184                         iconv_ok = FALSE;
3185                         return g_strdup(from);
3186                 }
3187         }
3188
3189         Xstrdup_a(from_tmp, from, return g_strdup(from));
3190         from_len = strlen(from);
3191         norm_utf7_len = from_len * 5;
3192         Xalloca(norm_utf7, norm_utf7_len + 1, return g_strdup(from));
3193         norm_utf7_p = norm_utf7;
3194
3195 #define IS_PRINT(ch) (isprint(ch) && isascii(ch))
3196
3197         while (from_len > 0) {
3198                 if (IS_PRINT(*from_tmp)) {
3199                         /* printable ascii char */
3200                         *norm_utf7_p = *from_tmp;
3201                         norm_utf7_p++;
3202                         from_tmp++;
3203                         from_len--;
3204                 } else {
3205                         size_t mblen;
3206
3207                         /* unprintable char: convert to UTF-7 */
3208                         for (mblen = 0;
3209                              !IS_PRINT(from_tmp[mblen]) && mblen < from_len;
3210                              mblen++)
3211                                 ;
3212                         from_len -= mblen;
3213                         if (iconv(cd, (ICONV_CONST gchar **)&from_tmp, &mblen,
3214                                   &norm_utf7_p, &norm_utf7_len) == -1) {
3215                                 g_warning("iconv cannot convert %s to UTF-7\n",
3216                                           conv_get_current_charset_str());
3217                                 return g_strdup(from);
3218                         }
3219
3220                         /* second iconv() call for flushing */
3221                         iconv(cd, NULL, NULL, &norm_utf7_p, &norm_utf7_len);
3222                 }
3223         }
3224
3225 #undef IS_PRINT
3226
3227         *norm_utf7_p = '\0';
3228         to_str = g_string_new(NULL);
3229         for (p = norm_utf7; p < norm_utf7_p; p++) {
3230                 /* replace: '&' -> "&-",
3231                             '+' -> '&',
3232                             escaped '/' -> ',' */
3233                 if (!in_escape && *p == '&') {
3234                         g_string_append(to_str, "&-");
3235                 } else if (!in_escape && *p == '+') {
3236                         g_string_append_c(to_str, '&');
3237                         in_escape = TRUE;
3238                 } else if (in_escape && *p == '/') {
3239                         g_string_append_c(to_str, ',');
3240                 } else if (in_escape && *p == '-') {
3241                         in_escape = FALSE;
3242                         g_string_append_c(to_str, '-');
3243                 } else {
3244                         g_string_append_c(to_str, *p);
3245                 }
3246         }
3247
3248         if (in_escape) {
3249                 in_escape = FALSE;
3250                 g_string_append_c(to_str, '-');
3251         }
3252
3253         to = to_str->str;
3254         g_string_free(to_str, FALSE);
3255
3256         return to;
3257 #endif /* !HAVE_ICONV */
3258 }
3259
3260 static gboolean imap_rename_folder_func(GNode *node, gpointer data)
3261 {
3262         FolderItem *item = node->data;
3263         gchar **paths = data;
3264         const gchar *oldpath = paths[0];
3265         const gchar *newpath = paths[1];
3266         gchar *base;
3267         gchar *new_itempath;
3268         gint oldpathlen;
3269
3270         oldpathlen = strlen(oldpath);
3271         if (strncmp(oldpath, item->path, oldpathlen) != 0) {
3272                 g_warning("path doesn't match: %s, %s\n", oldpath, item->path);
3273                 return TRUE;
3274         }
3275
3276         base = item->path + oldpathlen;
3277         while (*base == G_DIR_SEPARATOR) base++;
3278         if (*base == '\0')
3279                 new_itempath = g_strdup(newpath);
3280         else
3281                 new_itempath = g_strconcat(newpath, G_DIR_SEPARATOR_S, base,
3282                                            NULL);
3283         g_free(item->path);
3284         item->path = new_itempath;
3285
3286         return FALSE;
3287 }
3288
3289 gint imap_get_num_list(Folder *folder, FolderItem *_item, GSList **msgnum_list)
3290 {
3291         IMAPFolderItem *item = (IMAPFolderItem *)_item;
3292         IMAPSession *session;
3293         gint ok, lastuid_old, nummsgs = 0, exists, resent, unseen, uid_val;
3294         GSList *uidlist, *elem;
3295         gchar *dir, *cmd_buf;
3296
3297         g_return_val_if_fail(folder != NULL, -1);
3298         g_return_val_if_fail(item != NULL, -1);
3299         g_return_val_if_fail(item->item.path != NULL, -1);
3300         g_return_val_if_fail(FOLDER_TYPE(folder) == F_IMAP, -1);
3301         g_return_val_if_fail(folder->account != NULL, -1);
3302
3303         session = imap_session_get(folder);
3304         g_return_val_if_fail(session != NULL, -1);
3305
3306         ok = imap_select(session, IMAP_FOLDER(folder), item->item.path,
3307                          &exists, &resent, &unseen, &uid_val);
3308         if (ok != IMAP_SUCCESS)
3309                 return -1;
3310
3311         if (exists == 0)
3312                 return 0;
3313
3314         cmd_buf = g_strdup_printf("UID %d:*", item->lastuid + 1);
3315         ok = imap_cmd_search(SESSION(session)->sock, cmd_buf, &uidlist);
3316         g_free(cmd_buf);
3317
3318         if (ok == IMAP_SOCKET) {
3319                 session_destroy((Session *)session);
3320                 ((RemoteFolder *)folder)->session = NULL;
3321                 return -1;
3322         }
3323
3324         if (ok != IMAP_SUCCESS) {
3325                 gint i;
3326                 GPtrArray *argbuf;
3327
3328                 argbuf = g_ptr_array_new();
3329
3330                 cmd_buf = g_strdup_printf("UID FETCH %d:* (UID)", item->lastuid + 1);
3331                 imap_cmd_gen_send(SESSION(session)->sock, cmd_buf);
3332                 g_free(cmd_buf);
3333                 ok = imap_cmd_ok(SESSION(session)->sock, argbuf);
3334                 if (ok != IMAP_SUCCESS) {
3335                         ptr_array_free_strings(argbuf);
3336                         g_ptr_array_free(argbuf, TRUE);
3337                         return -1;
3338                 }
3339
3340                 for(i = 0; i < argbuf->len; i++) {
3341                         int ret, msgnum;
3342
3343                         if((ret = sscanf(g_ptr_array_index(argbuf, i),
3344                                     "%*d FETCH (UID %d)", &msgnum)) == 1)
3345                                 uidlist = g_slist_prepend(uidlist, GINT_TO_POINTER(msgnum));
3346                 }
3347                 ptr_array_free_strings(argbuf);
3348                 g_ptr_array_free(argbuf, TRUE);
3349         }
3350
3351         lastuid_old = item->lastuid;
3352         *msgnum_list = g_slist_copy(item->uid_list);
3353         debug_print("Got %d uids from cache\n", g_slist_length(item->uid_list));
3354
3355         for (elem = uidlist; elem != NULL; elem = g_slist_next(elem)) {
3356                 guint msgnum;
3357
3358                 msgnum = GPOINTER_TO_INT(elem->data);
3359                 if (msgnum > lastuid_old) {
3360                         *msgnum_list = g_slist_prepend(*msgnum_list, GINT_TO_POINTER(msgnum));
3361                         item->uid_list = g_slist_prepend(item->uid_list, GINT_TO_POINTER(msgnum));
3362                         nummsgs++;
3363
3364                         if(msgnum > item->lastuid)
3365                                 item->lastuid = msgnum;
3366                 }
3367         }
3368         g_slist_free(uidlist);
3369
3370         if (g_slist_length(item->uid_list) != exists) {
3371                 /* Cache contains more messages then folder, we have cached
3372                    an old UID of a message that was removed */
3373                 debug_print("Freeing imap uid cache");
3374                 item->lastuid = 0;
3375                 g_slist_free(item->uid_list);
3376                 item->uid_list = NULL;
3377
3378                 g_slist_free(*msgnum_list);
3379
3380                 return imap_get_num_list(folder, _item, msgnum_list);
3381         }
3382
3383         dir = folder_item_get_path((FolderItem *)item);
3384         debug_print("removing old messages from %s\n", dir);
3385         remove_numbered_files_not_in_list(dir, *msgnum_list);
3386         g_free(dir);
3387
3388         return nummsgs;
3389 }
3390
3391 static MsgInfo *imap_parse_msg(const gchar *file, FolderItem *item)
3392 {
3393         MsgInfo *msginfo;
3394         MsgFlags flags;
3395
3396         flags.perm_flags = MSG_NEW|MSG_UNREAD;
3397         flags.tmp_flags = 0;
3398
3399         g_return_val_if_fail(item != NULL, NULL);
3400         g_return_val_if_fail(file != NULL, NULL);
3401
3402         if (item->stype == F_QUEUE) {
3403                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
3404         } else if (item->stype == F_DRAFT) {
3405                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
3406         }
3407
3408         msginfo = procheader_parse_file(file, flags, FALSE, FALSE);
3409         if (!msginfo) return NULL;
3410
3411         msginfo->folder = item;
3412
3413         return msginfo;
3414 }
3415
3416 static int compare_uint(gconstpointer a, gconstpointer b)
3417 {
3418         return a-b;
3419 }
3420
3421 GSList *imap_get_msginfos(Folder *folder, FolderItem *item, GSList *msgnum_list)
3422 {
3423         IMAPSession *session;
3424         GSList *sorted_list, *elem, *ret = NULL;
3425         gint ok, startnum, lastnum;
3426
3427         g_return_val_if_fail(folder != NULL, NULL);
3428         g_return_val_if_fail(item != NULL, NULL);
3429         g_return_val_if_fail(msgnum_list != NULL, NULL);
3430
3431         session = imap_session_get(folder);
3432         g_return_val_if_fail(session != NULL, NULL);
3433
3434         ok = imap_select(session, IMAP_FOLDER(folder), item->path,
3435                          NULL, NULL, NULL, NULL);
3436         if (ok != IMAP_SUCCESS)
3437                 return NULL;
3438
3439         sorted_list = g_slist_sort(g_slist_copy(msgnum_list), compare_uint);
3440
3441         startnum = lastnum = GPOINTER_TO_INT(sorted_list->data);
3442
3443         for (elem = sorted_list;; elem = g_slist_next(elem)) {
3444                 guint num;
3445
3446                 if (elem)
3447                         num = GPOINTER_TO_INT(elem->data);
3448
3449                 if (num > lastnum + 1 || elem == NULL) {
3450                         if (!(item->stype == F_QUEUE || item->stype == F_DRAFT)) {
3451                                 ret = g_slist_concat(ret,
3452                                         imap_get_uncached_messages(
3453                                                 session, item, startnum, lastnum));
3454                         } else {
3455                                 int i;
3456                                 for (i = startnum; i <= lastnum; ++i) {
3457                                         gchar *file;
3458
3459                                         file = imap_fetch_msg(folder, item, i);
3460                                         if (file != NULL) {
3461                                                 MsgInfo *msginfo = imap_parse_msg(file, item);
3462                                                 if (msginfo != NULL) {
3463                                                         msginfo->msgnum = i;
3464                                                         ret = g_slist_append(ret, msginfo);
3465                                                 }
3466                                                 g_free(file);
3467                                         }
3468                                 }
3469                         }
3470
3471                         if (elem == NULL)
3472                                 break;
3473
3474                         startnum = num;
3475                 }
3476                 lastnum = num;
3477         }
3478
3479         g_slist_free(sorted_list);
3480
3481         return ret;
3482 }
3483
3484 MsgInfo *imap_get_msginfo(Folder *folder, FolderItem *item, gint uid)
3485 {
3486         IMAPSession *session;
3487         MsgInfo *msginfo = NULL;
3488         gint ok;
3489
3490         g_return_val_if_fail(folder != NULL, NULL);
3491         g_return_val_if_fail(item != NULL, NULL);
3492
3493         session = imap_session_get(folder);
3494         g_return_val_if_fail(session != NULL, NULL);
3495
3496         ok = imap_select(session, IMAP_FOLDER(folder), item->path,
3497                          NULL, NULL, NULL, NULL);
3498         if (ok != IMAP_SUCCESS)
3499                 return NULL;
3500
3501         if (!(item->stype == F_QUEUE || item->stype == F_DRAFT)) {
3502                 GSList *list;
3503
3504                 list = imap_get_uncached_messages(session, item, uid, uid);
3505                 if (list) {
3506                         msginfo = (MsgInfo *)list->data;
3507                         list->data = NULL;
3508                 }
3509                 procmsg_msg_list_free(list);
3510         } else {
3511                 gchar *file;
3512
3513                 file = imap_fetch_msg(folder, item, uid);
3514                 if (file != NULL) {
3515                         msginfo = imap_parse_msg(file, item);
3516                         if (msginfo != NULL)
3517                                 msginfo->msgnum = uid;
3518                         g_free(file);
3519                 }
3520         }
3521
3522         return msginfo;
3523 }
3524
3525 gboolean imap_check_msgnum_validity(Folder *folder, FolderItem *_item)
3526 {
3527         IMAPSession *session;
3528         IMAPFolderItem *item = (IMAPFolderItem *)_item;
3529         gint ok, exists = 0, recent = 0, unseen = 0;
3530         guint32 uid_next, uid_validity = 0;
3531
3532         g_return_val_if_fail(folder != NULL, FALSE);
3533         g_return_val_if_fail(item != NULL, FALSE);
3534         g_return_val_if_fail(item->item.folder != NULL, FALSE);
3535         g_return_val_if_fail(FOLDER_TYPE(item->item.folder) == F_IMAP, FALSE);
3536
3537         session = imap_session_get(folder);
3538         g_return_val_if_fail(session != NULL, FALSE);
3539
3540         ok = imap_status(session, IMAP_FOLDER(folder), item->item.path,
3541                          &exists, &recent, &uid_next, &uid_validity, &unseen);
3542         if (ok != IMAP_SUCCESS)
3543                 return FALSE;
3544
3545         if(item->item.mtime == uid_validity)
3546                 return TRUE;
3547
3548         debug_print("Freeing imap uid cache");
3549         item->lastuid = 0;
3550         g_slist_free(item->uid_list);
3551         item->uid_list = NULL;
3552
3553         item->item.mtime = uid_validity;
3554
3555         imap_delete_all_cached_messages((FolderItem *)item);
3556
3557         return FALSE;
3558 }