2007-04-26 [colin] 2.9.1cvs28
[claws.git] / src / imap.c
1 /*
2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
3  * Copyright (C) 1999-2007 Hiroyuki Yamamoto and the Claws Mail team
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License as published by
7  * the Free Software Foundation; either version 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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 <glib/gi18n.h>
28 #include <stdio.h>
29 #include <string.h>
30 #include "imap.h"
31 #include "imap_gtk.h"
32 #include "inc.h"
33 #include "xml.h"
34 #include "alertpanel.h"
35
36 #ifdef HAVE_LIBETPAN
37
38 #include <stdlib.h>
39 #include <dirent.h>
40 #include <unistd.h>
41 #include <ctype.h>
42 #include <time.h>
43 #include <errno.h>
44 #if HAVE_ICONV
45 #  include <iconv.h>
46 #endif
47
48 #if USE_OPENSSL
49 #  include "ssl.h"
50 #endif
51
52 #include "folder.h"
53 #include "session.h"
54 #include "procmsg.h"
55 #include "socket.h"
56 #include "recv.h"
57 #include "procheader.h"
58 #include "prefs_account.h"
59 #include "codeconv.h"
60 #include "md5.h"
61 #include "base64.h"
62 #include "utils.h"
63 #include "prefs_common.h"
64 #include "inputdialog.h"
65 #include "log.h"
66 #include "remotefolder.h"
67 #include "claws.h"
68 #include "statusbar.h"
69 #include "msgcache.h"
70 #include "imap-thread.h"
71 #include "account.h"
72
73 typedef struct _IMAPFolder      IMAPFolder;
74 typedef struct _IMAPSession     IMAPSession;
75 typedef struct _IMAPNameSpace   IMAPNameSpace;
76 typedef struct _IMAPFolderItem  IMAPFolderItem;
77
78 #include "prefs_account.h"
79
80 #define IMAP_FOLDER(obj)        ((IMAPFolder *)obj)
81 #define IMAP_FOLDER_ITEM(obj)   ((IMAPFolderItem *)obj)
82 #define IMAP_SESSION(obj)       ((IMAPSession *)obj)
83
84 struct _IMAPFolder
85 {
86         RemoteFolder rfolder;
87
88         /* list of IMAPNameSpace */
89         GList *ns_personal;
90         GList *ns_others;
91         GList *ns_shared;
92         gchar last_seen_separator;
93         guint refcnt;
94 };
95
96 struct _IMAPSession
97 {
98         Session session;
99
100         gboolean authenticated;
101
102         GSList *capability;
103         gboolean uidplus;
104
105         gchar *mbox;
106         guint cmd_count;
107
108         /* CLAWS */
109         gboolean folder_content_changed;
110         guint exists;
111         Folder * folder;
112         gboolean busy;
113         gboolean cancelled;
114 };
115
116 struct _IMAPNameSpace
117 {
118         gchar *name;
119         gchar separator;
120 };
121
122 #define IMAP_SUCCESS    0
123 #define IMAP_SOCKET     2
124 #define IMAP_AUTHFAIL   3
125 #define IMAP_PROTOCOL   4
126 #define IMAP_SYNTAX     5
127 #define IMAP_IOERR      6
128 #define IMAP_ERROR      7
129
130 #define IMAPBUFSIZE     8192
131
132 typedef enum
133 {
134         IMAP_FLAG_SEEN          = 1 << 0,
135         IMAP_FLAG_ANSWERED      = 1 << 1,
136         IMAP_FLAG_FLAGGED       = 1 << 2,
137         IMAP_FLAG_DELETED       = 1 << 3,
138         IMAP_FLAG_DRAFT         = 1 << 4
139 } IMAPFlags;
140
141 #define IMAP_IS_SEEN(flags)     ((flags & IMAP_FLAG_SEEN) != 0)
142 #define IMAP_IS_ANSWERED(flags) ((flags & IMAP_FLAG_ANSWERED) != 0)
143 #define IMAP_IS_FLAGGED(flags)  ((flags & IMAP_FLAG_FLAGGED) != 0)
144 #define IMAP_IS_DELETED(flags)  ((flags & IMAP_FLAG_DELETED) != 0)
145 #define IMAP_IS_DRAFT(flags)    ((flags & IMAP_FLAG_DRAFT) != 0)
146
147
148 #define IMAP4_PORT      143
149 #if USE_OPENSSL
150 #define IMAPS_PORT      993
151 #endif
152
153 #define IMAP_CMD_LIMIT  1000
154
155 struct _IMAPFolderItem
156 {
157         FolderItem item;
158
159         guint lastuid;
160         guint uid_next;
161         GSList *uid_list;
162         gboolean batching;
163
164         time_t use_cache;
165         gint c_messages;
166         guint32 c_uid_next;
167         guint32 c_uid_validity;
168         gint c_unseen;
169
170         GHashTable *flags_set_table;
171         GHashTable *flags_unset_table;
172         guint32 last_change;
173         guint32 last_sync;
174 };
175
176 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item);
177 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag);
178
179 static void imap_folder_init            (Folder         *folder,
180                                          const gchar    *name,
181                                          const gchar    *path);
182
183 static Folder   *imap_folder_new        (const gchar    *name,
184                                          const gchar    *path);
185 static void      imap_folder_destroy    (Folder         *folder);
186
187 static IMAPSession *imap_session_new    (Folder         *folder,
188                                          const PrefsAccount     *account);
189 static void     imap_session_authenticate(IMAPSession           *session,
190                                           const PrefsAccount    *account);
191 static void     imap_session_destroy    (Session        *session);
192
193 static gchar   *imap_fetch_msg          (Folder         *folder, 
194                                          FolderItem     *item, 
195                                          gint            uid);
196 static gchar   *imap_fetch_msg_full     (Folder         *folder, 
197                                          FolderItem     *item, 
198                                          gint            uid,
199                                          gboolean        headers,
200                                          gboolean        body);
201 static gint     imap_add_msg            (Folder         *folder,
202                                          FolderItem     *dest,
203                                          const gchar    *file, 
204                                          MsgFlags       *flags);
205 static gint     imap_add_msgs           (Folder         *folder, 
206                                          FolderItem     *dest,
207                                          GSList         *file_list,
208                                          GRelation      *relation);
209
210 static gint     imap_copy_msg           (Folder         *folder,
211                                          FolderItem     *dest, 
212                                          MsgInfo        *msginfo);
213 static gint     imap_copy_msgs          (Folder         *folder, 
214                                          FolderItem     *dest, 
215                                          MsgInfoList    *msglist, 
216                                          GRelation      *relation);
217
218 static gint     imap_remove_msg         (Folder         *folder, 
219                                          FolderItem     *item, 
220                                          gint            uid);
221 static gint     imap_remove_msgs        (Folder         *folder, 
222                                          FolderItem     *dest, 
223                                          MsgInfoList    *msglist, 
224                                          GRelation      *relation);
225 static gint     imap_remove_all_msg     (Folder         *folder, 
226                                          FolderItem     *item);
227
228 static gboolean imap_is_msg_changed     (Folder         *folder,
229                                          FolderItem     *item, 
230                                          MsgInfo        *msginfo);
231
232 static gint     imap_close              (Folder         *folder, 
233                                          FolderItem     *item);
234
235 static gint     imap_scan_tree          (Folder         *folder);
236
237 static gint     imap_create_tree        (Folder         *folder);
238
239 static FolderItem *imap_create_folder   (Folder         *folder,
240                                          FolderItem     *parent,
241                                          const gchar    *name);
242 static gint     imap_rename_folder      (Folder         *folder,
243                                          FolderItem     *item, 
244                                          const gchar    *name);
245 static gint     imap_remove_folder      (Folder         *folder, 
246                                          FolderItem     *item);
247
248 static FolderItem *imap_folder_item_new (Folder         *folder);
249 static void imap_folder_item_destroy    (Folder         *folder,
250                                          FolderItem     *item);
251
252 static IMAPSession *imap_session_get    (Folder         *folder);
253
254 static gint imap_auth                   (IMAPSession    *session,
255                                          const gchar    *user,
256                                          const gchar    *pass,
257                                          IMAPAuthType    type);
258
259 static gint imap_scan_tree_recursive    (IMAPSession    *session,
260                                          FolderItem     *item,
261                                          gboolean        subs_only);
262
263 static void imap_create_missing_folders (Folder         *folder);
264 static FolderItem *imap_create_special_folder
265                                         (Folder                 *folder,
266                                          SpecialFolderItemType   stype,
267                                          const gchar            *name);
268
269 static gint imap_do_copy_msgs           (Folder         *folder,
270                                          FolderItem     *dest,
271                                          MsgInfoList    *msglist,
272                                          GRelation      *relation);
273
274 static void imap_delete_all_cached_messages     (FolderItem     *item);
275 static void imap_set_batch              (Folder         *folder,
276                                          FolderItem     *item,
277                                          gboolean        batch);
278 static gint imap_set_message_flags      (IMAPSession    *session,
279                                          MsgNumberList  *numlist,
280                                          IMAPFlags       flags,
281                                          gboolean        is_set);
282 static gint imap_select                 (IMAPSession    *session,
283                                          IMAPFolder     *folder,
284                                          const gchar    *path,
285                                          gint           *exists,
286                                          gint           *recent,
287                                          gint           *unseen,
288                                          guint32        *uid_validity,
289                                          gboolean        block);
290 static gint imap_status                 (IMAPSession    *session,
291                                          IMAPFolder     *folder,
292                                          const gchar    *path,
293                                          IMAPFolderItem *item,
294                                          gint           *messages,
295                                          guint32        *uid_next,
296                                          guint32        *uid_validity,
297                                          gint           *unseen,
298                                          gboolean        block);
299
300 static gchar imap_get_path_separator            (IMAPSession    *session,
301                                                  IMAPFolder     *folder,
302                                                  const gchar    *path);
303 static gchar *imap_get_real_path                (IMAPSession    *session,
304                                                  IMAPFolder     *folder,
305                                                  const gchar    *path);
306 static void imap_synchronise            (FolderItem     *item);
307 static gboolean imap_is_busy            (Folder *folder);
308
309 static void imap_free_capabilities      (IMAPSession    *session);
310
311 /* low-level IMAP4rev1 commands */
312 static gint imap_cmd_login      (IMAPSession    *session,
313                                  const gchar    *user,
314                                  const gchar    *pass,
315                                  const gchar    *type);
316 static gint imap_cmd_noop       (IMAPSession    *session);
317 #if USE_OPENSSL
318 static gint imap_cmd_starttls   (IMAPSession    *session);
319 #endif
320 static gint imap_cmd_select     (IMAPSession    *session,
321                                  const gchar    *folder,
322                                  gint           *exists,
323                                  gint           *recent,
324                                  gint           *unseen,
325                                  guint32        *uid_validity,
326                                  gboolean        block);
327 static gint imap_cmd_examine    (IMAPSession    *session,
328                                  const gchar    *folder,
329                                  gint           *exists,
330                                  gint           *recent,
331                                  gint           *unseen,
332                                  guint32        *uid_validity,
333                                  gboolean        block);
334 static gint imap_cmd_create     (IMAPSession    *sock,
335                                  const gchar    *folder);
336 static gint imap_cmd_rename     (IMAPSession    *sock,
337                                  const gchar    *oldfolder,
338                                  const gchar    *newfolder);
339 static gint imap_cmd_delete     (IMAPSession    *session,
340                                  const gchar    *folder);
341 static gint imap_cmd_fetch      (IMAPSession    *sock,
342                                  guint32         uid,
343                                  const gchar    *filename,
344                                  gboolean        headers,
345                                  gboolean        body);
346 static gint imap_cmd_append     (IMAPSession    *session,
347                                  const gchar    *destfolder,
348                                  const gchar    *file,
349                                  IMAPFlags       flags,
350                                  guint32        *new_uid);
351 static gint imap_cmd_copy       (IMAPSession *session,
352                                  struct mailimap_set * set,
353                                  const gchar *destfolder,
354                                  GRelation *uid_mapping,
355                                  struct mailimap_set ** source,
356                                  struct mailimap_set ** dest);
357 static gint imap_cmd_store      (IMAPSession    *session,
358                                  struct mailimap_set * set,
359                                  IMAPFlags flags,
360                                  int do_add);
361 static gint imap_cmd_expunge    (IMAPSession    *session);
362
363 static void imap_path_separator_subst           (gchar          *str,
364                                                  gchar           separator);
365
366 static gchar *imap_utf8_to_modified_utf7        (const gchar    *from);
367 static gchar *imap_modified_utf7_to_utf8        (const gchar    *mutf7_str);
368
369 static gboolean imap_rename_folder_func         (GNode          *node,
370                                                  gpointer        data);
371 static gint imap_get_num_list                   (Folder         *folder,
372                                                  FolderItem     *item,
373                                                  GSList        **list,
374                                                  gboolean       *old_uids_valid);
375 static GSList *imap_get_msginfos                (Folder         *folder,
376                                                  FolderItem     *item,
377                                                  GSList         *msgnum_list);
378 static MsgInfo *imap_get_msginfo                (Folder         *folder,
379                                                  FolderItem     *item,
380                                                  gint            num);
381 static gboolean imap_scan_required              (Folder         *folder,
382                                                  FolderItem     *item);
383 static void imap_change_flags                   (Folder         *folder,
384                                                  FolderItem     *item,
385                                                  MsgInfo        *msginfo,
386                                                  MsgPermFlags    newflags);
387 static gint imap_get_flags                      (Folder         *folder,
388                                                  FolderItem     *item,
389                                                  MsgInfoList    *msglist,
390                                                  GRelation      *msgflags);
391 static gchar *imap_folder_get_path              (Folder         *folder);
392 static gchar *imap_item_get_path                (Folder         *folder,
393                                                  FolderItem     *item);
394 static MsgInfo *imap_parse_msg(const gchar *file, FolderItem *item);
395
396
397 /* data types conversion libetpan <-> claws */
398 static GSList * imap_list_from_lep(IMAPFolder * folder,
399                                    clist * list, const gchar * real_path, gboolean all);
400 static GSList * imap_get_lep_set_from_numlist(MsgNumberList *numlist);
401 static GSList * imap_get_lep_set_from_msglist(MsgInfoList *msglist);
402 static GSList * imap_uid_list_from_lep(clist * list);
403 static GSList * imap_uid_list_from_lep_tab(carray * list);
404 static MsgInfo *imap_envelope_from_lep(struct imap_fetch_env_info * info,
405                                        FolderItem *item);
406 static void imap_lep_set_free(GSList *seq_list);
407 static struct mailimap_flag_list * imap_flag_to_lep(IMAPFlags flags);
408
409 typedef struct _hashtable_data {
410         IMAPSession *session;
411         GSList *msglist;
412         IMAPFolderItem *item;
413 } hashtable_data;
414
415 static FolderClass imap_class;
416
417 typedef struct _thread_data {
418         gchar *server;
419         gushort port;
420         gboolean done;
421         SockInfo *sock;
422 #ifdef USE_OPENSSL
423         SSLType ssl_type;
424 #endif
425 } thread_data;
426
427 FolderClass *imap_get_class(void)
428 {
429         if (imap_class.idstr == NULL) {
430                 imap_class.type = F_IMAP;
431                 imap_class.idstr = "imap";
432                 imap_class.uistr = "IMAP4";
433
434                 /* Folder functions */
435                 imap_class.new_folder = imap_folder_new;
436                 imap_class.destroy_folder = imap_folder_destroy;
437                 imap_class.scan_tree = imap_scan_tree;
438                 imap_class.create_tree = imap_create_tree;
439
440                 /* FolderItem functions */
441                 imap_class.item_new = imap_folder_item_new;
442                 imap_class.item_destroy = imap_folder_item_destroy;
443                 imap_class.item_get_path = imap_item_get_path;
444                 imap_class.create_folder = imap_create_folder;
445                 imap_class.rename_folder = imap_rename_folder;
446                 imap_class.remove_folder = imap_remove_folder;
447                 imap_class.close = imap_close;
448                 imap_class.get_num_list = imap_get_num_list;
449                 imap_class.scan_required = imap_scan_required;
450                 imap_class.set_xml = folder_set_xml;
451                 imap_class.get_xml = folder_get_xml;
452                 imap_class.item_set_xml = imap_item_set_xml;
453                 imap_class.item_get_xml = imap_item_get_xml;
454
455                 /* Message functions */
456                 imap_class.get_msginfo = imap_get_msginfo;
457                 imap_class.get_msginfos = imap_get_msginfos;
458                 imap_class.fetch_msg = imap_fetch_msg;
459                 imap_class.fetch_msg_full = imap_fetch_msg_full;
460                 imap_class.add_msg = imap_add_msg;
461                 imap_class.add_msgs = imap_add_msgs;
462                 imap_class.copy_msg = imap_copy_msg;
463                 imap_class.copy_msgs = imap_copy_msgs;
464                 imap_class.remove_msg = imap_remove_msg;
465                 imap_class.remove_msgs = imap_remove_msgs;
466                 imap_class.remove_all_msg = imap_remove_all_msg;
467                 imap_class.is_msg_changed = imap_is_msg_changed;
468                 imap_class.change_flags = imap_change_flags;
469                 imap_class.get_flags = imap_get_flags;
470                 imap_class.set_batch = imap_set_batch;
471                 imap_class.synchronise = imap_synchronise;
472 #ifdef USE_PTREAD
473                 pthread_mutex_init(&imap_mutex, NULL);
474 #endif
475         }
476         
477         return &imap_class;
478 }
479
480 static Folder *imap_folder_new(const gchar *name, const gchar *path)
481 {
482         Folder *folder;
483
484         folder = (Folder *)g_new0(IMAPFolder, 1);
485         folder->klass = &imap_class;
486         imap_folder_init(folder, name, path);
487
488         return folder;
489 }
490
491 static void imap_folder_destroy(Folder *folder)
492 {
493         while (imap_folder_get_refcnt(folder) > 0)
494                 gtk_main_iteration();
495         
496         folder_remote_folder_destroy(REMOTE_FOLDER(folder));
497         imap_done(folder);
498 }
499
500 static void imap_folder_init(Folder *folder, const gchar *name,
501                              const gchar *path)
502 {
503         folder_remote_folder_init((Folder *)folder, name, path);
504 }
505
506 static FolderItem *imap_folder_item_new(Folder *folder)
507 {
508         IMAPFolderItem *item;
509         
510         item = g_new0(IMAPFolderItem, 1);
511         item->lastuid = 0;
512         item->uid_next = 0;
513         item->uid_list = NULL;
514
515         return (FolderItem *)item;
516 }
517
518 static void imap_folder_item_destroy(Folder *folder, FolderItem *_item)
519 {
520         IMAPFolderItem *item = (IMAPFolderItem *)_item;
521
522         g_return_if_fail(item != NULL);
523         g_slist_free(item->uid_list);
524
525         g_free(_item);
526 }
527
528 static gboolean imap_reset_uid_lists_func(GNode *node, gpointer data)
529 {
530         IMAPFolderItem *item = (IMAPFolderItem *)node->data;
531         
532         item->lastuid = 0;
533         g_slist_free(item->uid_list);
534         item->uid_list = NULL;
535         
536         return FALSE;
537 }
538
539 static void imap_reset_uid_lists(Folder *folder)
540 {
541         if(folder->node == NULL)
542                 return;
543         
544         /* Destroy all uid lists and rest last uid */
545         g_node_traverse(folder->node, G_IN_ORDER, G_TRAVERSE_ALL, -1, imap_reset_uid_lists_func, NULL); 
546 }
547
548 static int imap_get_capabilities(IMAPSession *session)
549 {
550         struct mailimap_capability_data *capabilities = NULL;
551         clistiter *cur;
552         int result = -1;
553
554         if (session->capability != NULL)
555                 return MAILIMAP_NO_ERROR;
556
557         capabilities = imap_threaded_capability(session->folder, &result);
558
559         if (result != MAILIMAP_NO_ERROR) {
560                 return MAILIMAP_ERROR_CAPABILITY;
561         }
562
563         if (capabilities == NULL) {
564                 return MAILIMAP_NO_ERROR;
565         }
566
567         for(cur = clist_begin(capabilities->cap_list) ; cur != NULL ;
568             cur = clist_next(cur)) {
569                 struct mailimap_capability * cap = 
570                         clist_content(cur);
571                 if (!cap || cap->cap_data.cap_name == NULL)
572                         continue;
573                 session->capability = g_slist_append
574                                 (session->capability,
575                                  g_strdup(cap->cap_data.cap_name));
576                 debug_print("got capa %s\n", cap->cap_data.cap_name);
577         }
578         mailimap_capability_data_free(capabilities);
579         return MAILIMAP_NO_ERROR;
580 }
581
582 static gboolean imap_has_capability(IMAPSession *session, const gchar *cap) 
583 {
584         GSList *cur;
585         for (cur = session->capability; cur; cur = cur->next) {
586                 if (!g_ascii_strcasecmp(cur->data, cap))
587                         return TRUE;
588         }
589         return FALSE;
590 }
591
592 static gint imap_auth(IMAPSession *session, const gchar *user, const gchar *pass,
593                       IMAPAuthType type)
594 {
595         gint ok = IMAP_ERROR;
596         static time_t last_login_err = 0;
597         gchar *ext_info = "";
598         
599         if (imap_get_capabilities(session) != MAILIMAP_NO_ERROR)
600                 return IMAP_ERROR;
601
602         switch(type) {
603         case IMAP_AUTH_ANON:
604                 ok = imap_cmd_login(session, user, pass, "ANONYMOUS");
605                 break;
606         case IMAP_AUTH_CRAM_MD5:
607                 ok = imap_cmd_login(session, user, pass, "CRAM-MD5");
608                 break;
609         case IMAP_AUTH_LOGIN:
610                 ok = imap_cmd_login(session, user, pass, "LOGIN");
611                 break;
612         case IMAP_AUTH_GSSAPI:
613                 ok = imap_cmd_login(session, user, pass, "GSSAPI");
614                 break;
615         default:
616                 debug_print("capabilities:\n"
617                                 "\t ANONYMOUS %d\n"
618                                 "\t CRAM-MD5 %d\n"
619                                 "\t LOGIN %d\n"
620                                 "\t GSSAPI %d\n", 
621                         imap_has_capability(session, "ANONYMOUS"),
622                         imap_has_capability(session, "CRAM-MD5"),
623                         imap_has_capability(session, "LOGIN"),
624                         imap_has_capability(session, "GSSAPI"));
625                 if (imap_has_capability(session, "CRAM-MD5"))
626                         ok = imap_cmd_login(session, user, pass, "CRAM-MD5");
627                 if (ok == IMAP_ERROR && imap_has_capability(session, "GSSAPI"))
628                         ok = imap_cmd_login(session, user, pass, "GSSAPI");
629                 if (ok == IMAP_ERROR) /* we always try LOGIN before giving up */
630                         ok = imap_cmd_login(session, user, pass, "LOGIN");
631         }
632
633         if (ok == IMAP_SUCCESS)
634                 session->authenticated = TRUE;
635         else {
636                 if (type == IMAP_AUTH_CRAM_MD5) {
637                         ext_info = _("\n\nCRAM-MD5 logins only work if libetpan has been "
638                                      "compiled with SASL support and the "
639                                      "CRAM-MD5 SASL plugin is installed.");
640                 } 
641
642                 if (time(NULL) - last_login_err > 10) {
643                         if (!prefs_common.no_recv_err_panel) {
644                                 alertpanel_error(_("Connection to %s failed: "
645                                         "login refused.%s"),
646                                         SESSION(session)->server, ext_info);
647                         } else {
648                                 log_error(LOG_PROTOCOL, _("Connection to %s failed: "
649                                         "login refused.%s\n"),
650                                         SESSION(session)->server, ext_info);
651                         }
652                 }
653                 last_login_err = time(NULL);
654         }
655         return ok;
656 }
657
658 static IMAPSession *imap_reconnect_if_possible(Folder *folder, IMAPSession *session)
659 {
660         RemoteFolder *rfolder = REMOTE_FOLDER(folder);
661         /* Check if this is the first try to establish a
662            connection, if yes we don't try to reconnect */
663         debug_print("reconnecting\n");
664         if (rfolder->session == NULL) {
665                 log_warning(LOG_PROTOCOL, _("Connecting to %s failed"),
666                             folder->account->recv_server);
667                 session_destroy(SESSION(session));
668                 session = NULL;
669         } else {
670                 log_warning(LOG_PROTOCOL, _("IMAP4 connection to %s has been"
671                             " disconnected. Reconnecting...\n"),
672                             folder->account->recv_server);
673                 statusbar_print_all(_("IMAP4 connection to %s has been"
674                             " disconnected. Reconnecting...\n"),
675                             folder->account->recv_server);
676                 SESSION(session)->state = SESSION_DISCONNECTED;
677                 session_destroy(SESSION(session));
678                 /* Clear folders session to make imap_session_get create
679                    a new session, because of rfolder->session == NULL
680                    it will not try to reconnect again and so avoid an
681                    endless loop */
682                 rfolder->session = NULL;
683                 debug_print("getting session...\n");
684                 session = imap_session_get(folder);
685                 rfolder->session = SESSION(session);
686                 statusbar_pop_all();
687         }
688         return session;
689 }
690
691 static void lock_session(IMAPSession *session)
692 {
693         if (session) {
694                 MainWindow *mainwin;
695                 
696                 debug_print("locking session %p (%d)\n", session, session->busy);
697                 if (session->busy)
698                         debug_print("         SESSION WAS LOCKED !!      \n");
699                 session->busy = TRUE;
700                 mainwin = mainwindow_get_mainwindow();
701                 if (mainwin) {
702                         toolbar_main_set_sensitive(mainwin);
703                         main_window_set_menu_sensitive(mainwin);
704                 }
705         } else {
706                 debug_print("can't lock null session\n");
707         }
708 }
709
710 static void unlock_session(IMAPSession *session)
711 {
712         if (session) {
713                 MainWindow *mainwin;
714                 
715                 debug_print("unlocking session %p\n", session);
716                 session->busy = FALSE;
717                 mainwin = mainwindow_get_mainwindow();
718                 if (mainwin) {
719                         toolbar_main_set_sensitive(mainwin);
720                         main_window_set_menu_sensitive(mainwin);
721                 }
722         } else {
723                 debug_print("can't unlock null session\n");
724         }
725 }
726
727 static IMAPSession *imap_session_get(Folder *folder)
728 {
729         RemoteFolder *rfolder = REMOTE_FOLDER(folder);
730         IMAPSession *session = NULL;
731
732         g_return_val_if_fail(folder != NULL, NULL);
733         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, NULL);
734         g_return_val_if_fail(folder->account != NULL, NULL);
735         
736         if (prefs_common.work_offline && 
737             !inc_offline_should_override(FALSE,
738                 _("Claws Mail needs network access in order "
739                   "to access the IMAP server."))) {
740                 return NULL;
741         }
742
743         /* Make sure we have a session */
744         if (rfolder->session != NULL) {
745                 session = IMAP_SESSION(rfolder->session);
746         } else if (rfolder->connecting) {
747                 debug_print("already connecting\n");
748                 return NULL;
749         } else {
750                 imap_reset_uid_lists(folder);
751                 if (time(NULL) - rfolder->last_failure <= 2)
752                         return NULL;
753                 rfolder->connecting = TRUE;
754                 session = imap_session_new(folder, folder->account);
755         }
756         if(session == NULL) {
757                 rfolder->last_failure = time(NULL);
758                 rfolder->connecting = FALSE;
759                 return NULL;
760         }
761
762         /* Make sure session is authenticated */
763         if (!IMAP_SESSION(session)->authenticated)
764                 imap_session_authenticate(IMAP_SESSION(session), folder->account);
765         
766         if (!IMAP_SESSION(session)->authenticated) {
767                 imap_threaded_disconnect(session->folder);
768                 SESSION(session)->state = SESSION_DISCONNECTED;
769                 session_destroy(SESSION(session));
770                 rfolder->session = NULL;
771                 rfolder->last_failure = time(NULL);
772                 rfolder->connecting = FALSE;
773                 return NULL;
774         }
775
776         lock_session(session);
777
778         /* I think the point of this code is to avoid sending a
779          * keepalive if we've used the session recently and therefore
780          * think it's still alive.  Unfortunately, most of the code
781          * does not yet check for errors on the socket, and so if the
782          * connection drops we don't notice until the timeout expires.
783          * A better solution than sending a NOOP every time would be
784          * for every command to be prepared to retry until it is
785          * successfully sent. -- mbp */
786         if ((time(NULL) - SESSION(session)->last_access_time > SESSION_TIMEOUT_INTERVAL) || session->cancelled) {
787                 /* verify that the session is still alive */
788                 if (imap_cmd_noop(session) != IMAP_SUCCESS) {
789                         debug_print("disconnected!\n");
790                         session = imap_reconnect_if_possible(folder, session);
791                 }
792                 
793                 session->cancelled = FALSE;
794         }
795
796         rfolder->session = SESSION(session);
797         rfolder->connecting = FALSE;
798
799         return IMAP_SESSION(session);
800 }
801
802 static IMAPSession *imap_session_new(Folder * folder,
803                                      const PrefsAccount *account)
804 {
805         IMAPSession *session;
806         gushort port;
807         int r;
808         int authenticated = FALSE;
809         
810 #ifdef USE_OPENSSL
811         /* FIXME: IMAP over SSL only... */ 
812         SSLType ssl_type;
813
814         port = account->set_imapport ? account->imapport
815                 : account->ssl_imap == SSL_TUNNEL ? IMAPS_PORT : IMAP4_PORT;
816         ssl_type = account->ssl_imap;   
817 #else
818         if (account->ssl_imap != SSL_NONE) {
819                 if (alertpanel_full(_("Insecure connection"),
820                         _("This connection is configured to be secured "
821                           "using SSL, but SSL is not available in this "
822                           "build of Claws Mail. \n\n"
823                           "Do you want to continue connecting to this "
824                           "server? The communication would not be "
825                           "secure."),
826                           GTK_STOCK_CANCEL, _("Con_tinue connecting"), 
827                           NULL, FALSE, NULL, ALERT_WARNING,
828                           G_ALERTDEFAULT) != G_ALERTALTERNATE)
829                         return NULL;
830         }
831         port = account->set_imapport ? account->imapport
832                 : IMAP4_PORT;
833 #endif
834
835         imap_init(folder);
836         statusbar_print_all(_("Connecting to IMAP4 server: %s..."), folder->account->recv_server);
837         if (account->set_tunnelcmd) {
838                 r = imap_threaded_connect_cmd(folder,
839                                               account->tunnelcmd,
840                                               account->recv_server,
841                                               port);
842         }
843         else {
844 #ifdef USE_OPENSSL
845                 if (ssl_type == SSL_TUNNEL) {
846                         r = imap_threaded_connect_ssl(folder,
847                                                       account->recv_server,
848                                                       port);
849                 }
850                 else 
851 #endif
852                 {
853                         r = imap_threaded_connect(folder,
854                                                   account->recv_server,
855                                                   port);
856                 }
857         }
858         
859         statusbar_pop_all();
860         if (r == MAILIMAP_NO_ERROR_AUTHENTICATED) {
861                 authenticated = TRUE;
862         }
863         else if (r == MAILIMAP_NO_ERROR_NON_AUTHENTICATED) {
864                 authenticated = FALSE;
865         }
866         else {
867 #if (LIBETPAN_VERSION_MAJOR > 0 || LIBETPAN_VERSION_MINOR > 48)
868 #ifdef USE_OPENSSL
869                 if (r == MAILIMAP_ERROR_SSL)
870                         log_error(LOG_PROTOCOL, _("SSL handshake failed\n"));
871 #endif
872 #endif
873                 if(!prefs_common.no_recv_err_panel) {
874                         alertpanel_error_log(_("Can't connect to IMAP4 server: %s:%d"),
875                                          account->recv_server, port);
876                 } else {
877                         log_error(LOG_PROTOCOL, _("Can't connect to IMAP4 server: %s:%d\n"),
878                                          account->recv_server, port);
879                 } 
880                 
881                 return NULL;
882         }
883         
884         session = g_new0(IMAPSession, 1);
885         session_init(SESSION(session));
886         SESSION(session)->type             = SESSION_IMAP;
887         SESSION(session)->server           = g_strdup(account->recv_server);
888         SESSION(session)->sock             = NULL;
889         
890         SESSION(session)->destroy          = imap_session_destroy;
891
892         session->capability = NULL;
893         
894         session->authenticated = authenticated;
895         session->mbox = NULL;
896         session->cmd_count = 0;
897         session->folder = folder;
898         IMAP_FOLDER(session->folder)->last_seen_separator = 0;
899
900 #if USE_OPENSSL
901         if (account->ssl_imap == SSL_STARTTLS) {
902                 gint ok;
903
904                 ok = imap_cmd_starttls(session);
905                 if (ok != IMAP_SUCCESS) {
906                         log_warning(LOG_PROTOCOL, _("Can't start TLS session.\n"));
907                         session_destroy(SESSION(session));
908                         return NULL;
909                 }
910
911                 imap_free_capabilities(session);
912                 session->authenticated = FALSE;
913                 session->uidplus = FALSE;
914                 session->cmd_count = 1;
915         }
916 #endif
917         log_message(LOG_PROTOCOL, "IMAP connection is %s-authenticated\n",
918                     (session->authenticated) ? "pre" : "un");
919         
920         return session;
921 }
922
923 static void imap_session_authenticate(IMAPSession *session, 
924                                       const PrefsAccount *account)
925 {
926         gchar *pass, *acc_pass;
927         gboolean failed = FALSE;
928
929         g_return_if_fail(account->userid != NULL);
930         acc_pass = account->passwd;
931 try_again:
932         pass = acc_pass;
933         if (!pass && account->imap_auth_type != IMAP_AUTH_ANON) {
934                 gchar *tmp_pass;
935                 tmp_pass = input_dialog_query_password(account->recv_server, account->userid);
936                 if (!tmp_pass)
937                         return;
938                 Xstrdup_a(pass, tmp_pass, {g_free(tmp_pass); return;});
939                 g_free(tmp_pass);
940         } else if (account->imap_auth_type == IMAP_AUTH_ANON) {
941                 pass = "";
942         }
943         statusbar_print_all(_("Connecting to IMAP4 server %s...\n"),
944                                 account->recv_server);
945         if (imap_auth(session, account->userid, pass, account->imap_auth_type) != IMAP_SUCCESS) {
946                 statusbar_pop_all();
947                 
948                 if (!failed) {
949                         acc_pass = NULL;
950                         failed = TRUE;
951                         goto try_again;
952                 } else {
953                         if (prefs_common.no_recv_err_panel) {
954                                 log_error(LOG_PROTOCOL, _("Couldn't login to IMAP server %s."), account->recv_server);
955                                 mainwindow_show_error();
956                         } else
957                                 alertpanel_error_log(_("Couldn't login to IMAP server %s."), account->recv_server);
958                 }               
959
960                 return;
961         } 
962
963         statusbar_pop_all();
964         session->authenticated = TRUE;
965         return;
966 }
967
968 static void imap_session_destroy(Session *session)
969 {
970         if (session->state != SESSION_DISCONNECTED)
971                 imap_threaded_disconnect(IMAP_SESSION(session)->folder);
972         
973         imap_free_capabilities(IMAP_SESSION(session));
974         g_free(IMAP_SESSION(session)->mbox);
975         sock_close(session->sock);
976         session->sock = NULL;
977 }
978
979 static gchar *imap_fetch_msg(Folder *folder, FolderItem *item, gint uid)
980 {
981         return imap_fetch_msg_full(folder, item, uid, TRUE, TRUE);
982 }
983
984 static guint get_file_size_with_crs(const gchar *filename) 
985 {
986         FILE *fp = NULL;
987         guint cnt = 0;
988         gchar buf[4096];
989         
990         if (filename == NULL)
991                 return -1;
992         
993         fp = fopen(filename, "rb");
994         if (!fp)
995                 return -1;
996         
997         while (fgets(buf, sizeof (buf), fp) != NULL) {
998                 cnt += strlen(buf);
999                 if (!strstr(buf, "\r\n") && strstr(buf, "\n"))
1000                         cnt++;
1001         }
1002         
1003         fclose(fp);
1004         return cnt;
1005 }
1006
1007 static gchar *imap_fetch_msg_full(Folder *folder, FolderItem *item, gint uid,
1008                                   gboolean headers, gboolean body)
1009 {
1010         gchar *path, *filename;
1011         IMAPSession *session;
1012         gint ok;
1013
1014         g_return_val_if_fail(folder != NULL, NULL);
1015         g_return_val_if_fail(item != NULL, NULL);
1016
1017         if (uid == 0)
1018                 return NULL;
1019
1020         path = folder_item_get_path(item);
1021         if (!is_dir_exist(path))
1022                 make_dir_hier(path);
1023         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(uid), NULL);
1024         g_free(path);
1025         debug_print("trying to fetch cached %s\n", filename);
1026         if (is_file_exist(filename)) {
1027                 /* see whether the local file represents the whole message
1028                  * or not. As the IMAP server reports size with \r chars,
1029                  * we have to update the local file (UNIX \n only) size */
1030                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1031                 guint have_size = get_file_size_with_crs(filename);
1032
1033                 if (cached)
1034                         debug_print("message %d has been already %scached (%d/%d).\n", uid,
1035                                 have_size >= cached->size ? "fully ":"",
1036                                 have_size, (int)cached->size);
1037                 
1038                 if (cached && (cached->size <= have_size || !body)) {
1039                         procmsg_msginfo_free(cached);
1040                         file_strip_crs(filename);
1041                         return filename;
1042                 } else if (!cached && time(NULL) - get_file_mtime(filename) < 60) {
1043                         debug_print("message not cached and file recent, considering file complete\n");
1044                         file_strip_crs(filename);
1045                         return filename;
1046                 } else {
1047                         procmsg_msginfo_free(cached);
1048                 }
1049         }
1050
1051         debug_print("getting session...\n");
1052         session = imap_session_get(folder);
1053         
1054         if (!session) {
1055                 g_free(filename);
1056                 return NULL;
1057         }
1058
1059         debug_print("IMAP fetching messages\n");
1060         ok = imap_select(session, IMAP_FOLDER(folder), item->path,
1061                          NULL, NULL, NULL, NULL, FALSE);
1062         if (ok != IMAP_SUCCESS) {
1063                 g_warning("can't select mailbox %s\n", item->path);
1064                 g_free(filename);
1065                 unlock_session(session);
1066                 return NULL;
1067         }
1068
1069         debug_print("getting message %d...\n", uid);
1070         ok = imap_cmd_fetch(session, (guint32)uid, filename, headers, body);
1071
1072         if (ok != IMAP_SUCCESS) {
1073                 g_warning("can't fetch message %d\n", uid);
1074                 g_free(filename);
1075                 unlock_session(session);
1076                 return NULL;
1077         }
1078
1079         unlock_session(session);
1080         file_strip_crs(filename);
1081         return filename;
1082 }
1083
1084 static gboolean imap_is_msg_fully_cached(Folder *folder, FolderItem *item, gint uid)
1085 {
1086         gchar *path, *filename;
1087         guint size = 0;
1088         MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1089         
1090         if (!cached)
1091                 return FALSE;
1092
1093         path = folder_item_get_path(item);
1094         if (!is_dir_exist(path))
1095                 return FALSE;
1096
1097         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(uid), NULL);
1098         g_free(path);
1099         if (is_file_exist(filename)) {
1100                 if (cached && cached->total_size == cached->size) {
1101                         /* fast path */
1102                         g_free(filename);
1103                         return TRUE;
1104                 }
1105                 size = get_file_size_with_crs(filename);
1106                 g_free(filename);
1107         }
1108         if (cached && size >= cached->size) {
1109                 cached->total_size = cached->size;
1110                 procmsg_msginfo_free(cached);
1111                 return TRUE;
1112         }
1113         if (cached)
1114                 procmsg_msginfo_free(cached);
1115         return FALSE;   
1116 }
1117
1118 void imap_cache_msg(FolderItem *item, gint msgnum)
1119 {
1120         Folder *folder = NULL;
1121         
1122         if (!item)
1123                 return;
1124         folder = item->folder;
1125         
1126         if (!imap_is_msg_fully_cached(folder, item, msgnum)) {
1127                 gchar *tmp = imap_fetch_msg_full(folder, item, msgnum, TRUE, TRUE);
1128                 debug_print("fetched %s\n", tmp);
1129                 g_free(tmp);
1130         }
1131 }
1132
1133 static gint imap_add_msg(Folder *folder, FolderItem *dest, 
1134                          const gchar *file, MsgFlags *flags)
1135 {
1136         gint ret;
1137         GSList file_list;
1138         MsgFileInfo fileinfo;
1139
1140         g_return_val_if_fail(file != NULL, -1);
1141
1142         fileinfo.msginfo = NULL;
1143         fileinfo.file = (gchar *)file;
1144         fileinfo.flags = flags;
1145         file_list.data = &fileinfo;
1146         file_list.next = NULL;
1147
1148         ret = imap_add_msgs(folder, dest, &file_list, NULL);
1149         return ret;
1150 }
1151
1152 static gint imap_add_msgs(Folder *folder, FolderItem *dest, GSList *file_list,
1153                    GRelation *relation)
1154 {
1155         gchar *destdir;
1156         IMAPSession *session;
1157         guint32 last_uid = 0;
1158         GSList *cur;
1159         MsgFileInfo *fileinfo;
1160         gint ok;
1161         gint curnum = 0, total = 0;
1162
1163
1164         g_return_val_if_fail(folder != NULL, -1);
1165         g_return_val_if_fail(dest != NULL, -1);
1166         g_return_val_if_fail(file_list != NULL, -1);
1167         
1168         debug_print("getting session...\n");
1169         session = imap_session_get(folder);
1170         if (!session) {
1171                 return -1;
1172         }
1173         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path);
1174
1175         statusbar_print_all(_("Adding messages..."));
1176         total = g_slist_length(file_list);
1177         for (cur = file_list; cur != NULL; cur = cur->next) {
1178                 IMAPFlags iflags = 0;
1179                 guint32 new_uid = 0;
1180                 gchar *real_file = NULL;
1181                 fileinfo = (MsgFileInfo *)cur->data;
1182
1183                 statusbar_progress_all(curnum, total, total < 10 ? 1:10);
1184                 curnum++;
1185
1186                 if (fileinfo->flags) {
1187                         if (MSG_IS_MARKED(*fileinfo->flags))
1188                                 iflags |= IMAP_FLAG_FLAGGED;
1189                         if (MSG_IS_REPLIED(*fileinfo->flags))
1190                                 iflags |= IMAP_FLAG_ANSWERED;
1191                         if (!MSG_IS_UNREAD(*fileinfo->flags))
1192                                 iflags |= IMAP_FLAG_SEEN;
1193                 }
1194                 
1195                 if (real_file == NULL)
1196                         real_file = g_strdup(fileinfo->file);
1197                 
1198                 if (folder_has_parent_of_type(dest, F_QUEUE) ||
1199                     folder_has_parent_of_type(dest, F_OUTBOX) ||
1200                     folder_has_parent_of_type(dest, F_DRAFT) ||
1201                     folder_has_parent_of_type(dest, F_TRASH))
1202                         iflags |= IMAP_FLAG_SEEN;
1203
1204                 ok = imap_cmd_append(session, destdir, real_file, iflags, 
1205                                      &new_uid);
1206
1207                 if (ok != IMAP_SUCCESS) {
1208                         g_warning("can't append message %s\n", real_file);
1209                         g_free(real_file);
1210                         g_free(destdir);
1211                         unlock_session(session);
1212                         statusbar_progress_all(0,0,0);
1213                         statusbar_pop_all();
1214                         return -1;
1215                 } else {
1216                         debug_print("appended new message as %d\n", new_uid);
1217                         /* put the local file in the imapcache, so that we don't
1218                          * have to fetch it back later. */
1219                         if (new_uid > 0) {
1220                                 gchar *cache_path = folder_item_get_path(dest);
1221                                 if (!is_dir_exist(cache_path))
1222                                         make_dir_hier(cache_path);
1223                                 if (is_dir_exist(cache_path)) {
1224                                         gchar *cache_file = g_strconcat(
1225                                                 cache_path, G_DIR_SEPARATOR_S, 
1226                                                 itos(new_uid), NULL);
1227                                         copy_file(real_file, cache_file, TRUE);
1228                                         debug_print("copied to cache: %s\n", cache_file);
1229                                         g_free(cache_file);
1230                                 }
1231                                 g_free(cache_path);
1232                         }
1233                 }
1234
1235                 if (relation != NULL)
1236                         g_relation_insert(relation, fileinfo->msginfo != NULL ? 
1237                                           (gpointer) fileinfo->msginfo : (gpointer) fileinfo,
1238                                           GINT_TO_POINTER(dest->last_num + 1));
1239                 if (new_uid == 0) {
1240                         new_uid = dest->last_num+1;
1241                 }
1242                 if (last_uid < new_uid) {
1243                         last_uid = new_uid;
1244                 }
1245
1246                 g_free(real_file);
1247         }
1248         statusbar_progress_all(0,0,0);
1249         statusbar_pop_all();
1250         
1251         imap_cmd_expunge(session);
1252         unlock_session(session);
1253         
1254         g_free(destdir);
1255
1256         return last_uid;
1257 }
1258
1259 static gint imap_do_copy_msgs(Folder *folder, FolderItem *dest, 
1260                               MsgInfoList *msglist, GRelation *relation)
1261 {
1262         FolderItem *src;
1263         gchar *destdir;
1264         GSList *seq_list, *cur;
1265         MsgInfo *msginfo;
1266         IMAPSession *session;
1267         gint ok = IMAP_SUCCESS;
1268         GRelation *uid_mapping;
1269         gint last_num = 0;
1270         gboolean single = FALSE;
1271
1272         g_return_val_if_fail(folder != NULL, -1);
1273         g_return_val_if_fail(dest != NULL, -1);
1274         g_return_val_if_fail(msglist != NULL, -1);
1275         
1276         debug_print("getting session...\n");
1277         session = imap_session_get(folder);
1278         
1279         if (!session) {
1280                 return -1;
1281         }
1282
1283         msginfo = (MsgInfo *)msglist->data;
1284         if (msglist->next == NULL)
1285                 single = TRUE;
1286         src = msginfo->folder;
1287         if (src == dest) {
1288                 g_warning("the src folder is identical to the dest.\n");
1289                 unlock_session(session);
1290                 return -1;
1291         }
1292
1293         if (src->folder != dest->folder) {
1294                 GSList *infolist = NULL, *cur;
1295                 int res = -1;
1296                 for (cur = msglist; cur; cur = cur->next) {
1297                         msginfo = (MsgInfo *)cur->data;
1298                         MsgFileInfo *fileinfo = g_new0(MsgFileInfo, 1);
1299                         fileinfo->file = procmsg_get_message_file(msginfo);
1300                         fileinfo->flags = &(msginfo->flags);
1301                         infolist = g_slist_prepend(infolist, fileinfo);
1302                 }
1303                 infolist = g_slist_reverse(infolist);
1304                 unlock_session(session);
1305                 res = folder_item_add_msgs(dest, infolist, FALSE);
1306                 for (cur = infolist; cur; cur = cur->next) {
1307                         MsgFileInfo *info = (MsgFileInfo *)cur->data;
1308                         g_free(info->file);
1309                         g_free(info);
1310                 }
1311                 g_slist_free(infolist);
1312                 return res;
1313         } 
1314
1315         ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder->path,
1316                          NULL, NULL, NULL, NULL, FALSE);
1317         if (ok != IMAP_SUCCESS) {
1318                 unlock_session(session);
1319                 return ok;
1320         }
1321
1322         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path);
1323         seq_list = imap_get_lep_set_from_msglist(msglist);
1324         uid_mapping = g_relation_new(2);
1325         g_relation_index(uid_mapping, 0, g_direct_hash, g_direct_equal);
1326         
1327         statusbar_print_all(_("Copying messages..."));
1328         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
1329                 struct mailimap_set * seq_set;
1330                 struct mailimap_set * source = NULL;
1331                 struct mailimap_set * dest = NULL;
1332                 seq_set = cur->data;
1333
1334                 debug_print("Copying messages from %s to %s ...\n",
1335                             src->path, destdir);
1336
1337                 ok = imap_cmd_copy(session, seq_set, destdir, uid_mapping,
1338                         &source, &dest);
1339                 
1340                 if (ok == IMAP_SUCCESS) {
1341                         if (single && relation && source && dest) {
1342                                 clistiter *l = clist_begin(source->set_list);
1343                                 struct mailimap_set_item *i = (struct mailimap_set_item *)clist_content(l);
1344                                 int snum = i->set_first;
1345                                 int dnum = 0;
1346                                 l = clist_begin(dest->set_list);
1347                                 i = (struct mailimap_set_item *)clist_content(l);
1348                                 dnum = i->set_first;
1349                                 g_relation_insert(uid_mapping, GINT_TO_POINTER(snum), 
1350                                         GINT_TO_POINTER(dnum));
1351                         }
1352                 }
1353
1354
1355                 if (source)
1356                         mailimap_set_free(source);
1357                 if (dest)
1358                         mailimap_set_free(dest);
1359
1360                 if (ok != IMAP_SUCCESS) {
1361                         g_relation_destroy(uid_mapping);
1362                         imap_lep_set_free(seq_list);
1363                         unlock_session(session);
1364                         statusbar_pop_all();
1365                         return -1;
1366                 }
1367         }
1368
1369         for (cur = msglist; cur != NULL; cur = g_slist_next(cur)) {
1370                 MsgInfo *msginfo = (MsgInfo *)cur->data;
1371                 GTuples *tuples;
1372
1373                 tuples = g_relation_select(uid_mapping, 
1374                                            GINT_TO_POINTER(msginfo->msgnum),
1375                                            0);
1376                 if (tuples->len > 0) {
1377                         gint num = GPOINTER_TO_INT(g_tuples_index(tuples, 0, 1));
1378                         g_relation_insert(relation, msginfo,
1379                                           GINT_TO_POINTER(num));
1380                         if (num > last_num)
1381                                 last_num = num;
1382                         debug_print("copied new message as %d\n", num);
1383                         /* put the local file in the imapcache, so that we don't
1384                          * have to fetch it back later. */
1385                         if (num > 0) {
1386                                 gchar *cache_path = folder_item_get_path(msginfo->folder);
1387                                 gchar *real_file = g_strconcat(
1388                                         cache_path, G_DIR_SEPARATOR_S, 
1389                                         itos(msginfo->msgnum), NULL);
1390                                 gchar *cache_file = NULL;
1391                                 g_free(cache_path);
1392                                 cache_path = folder_item_get_path(dest);
1393                                 cache_file = g_strconcat(
1394                                         cache_path, G_DIR_SEPARATOR_S, 
1395                                         itos(num), NULL);
1396                                 if (!is_dir_exist(cache_path))
1397                                         make_dir_hier(cache_path);
1398                                 if (is_file_exist(real_file) && is_dir_exist(cache_path)) {
1399                                         copy_file(real_file, cache_file, TRUE);
1400                                         debug_print("copied to cache: %s\n", cache_file);
1401                                 }
1402                                 g_free(real_file);
1403                                 g_free(cache_file);
1404                                 g_free(cache_path);
1405                         }
1406                 } else
1407                         g_relation_insert(relation, msginfo,
1408                                           GINT_TO_POINTER(0));
1409                 g_tuples_destroy(tuples);
1410         }
1411         statusbar_pop_all();
1412
1413         g_relation_destroy(uid_mapping);
1414         imap_lep_set_free(seq_list);
1415
1416         g_free(destdir);
1417         
1418         IMAP_FOLDER_ITEM(dest)->lastuid = 0;
1419         IMAP_FOLDER_ITEM(dest)->uid_next = 0;
1420         g_slist_free(IMAP_FOLDER_ITEM(dest)->uid_list);
1421         IMAP_FOLDER_ITEM(dest)->uid_list = NULL;
1422
1423         unlock_session(session);
1424         if (ok == IMAP_SUCCESS)
1425                 return last_num;
1426         else
1427                 return -1;
1428 }
1429
1430 static gint imap_copy_msg(Folder *folder, FolderItem *dest, MsgInfo *msginfo)
1431 {
1432         GSList msglist;
1433
1434         g_return_val_if_fail(msginfo != NULL, -1);
1435
1436         msglist.data = msginfo;
1437         msglist.next = NULL;
1438
1439         return imap_copy_msgs(folder, dest, &msglist, NULL);
1440 }
1441
1442 static gint imap_copy_msgs(Folder *folder, FolderItem *dest, 
1443                     MsgInfoList *msglist, GRelation *relation)
1444 {
1445         MsgInfo *msginfo;
1446         gint ret;
1447
1448         g_return_val_if_fail(folder != NULL, -1);
1449         g_return_val_if_fail(dest != NULL, -1);
1450         g_return_val_if_fail(msglist != NULL, -1);
1451
1452         msginfo = (MsgInfo *)msglist->data;
1453         g_return_val_if_fail(msginfo->folder != NULL, -1);
1454
1455         ret = imap_do_copy_msgs(folder, dest, msglist, relation);
1456         return ret;
1457 }
1458
1459
1460 static gint imap_do_remove_msgs(Folder *folder, FolderItem *dest, 
1461                                 MsgInfoList *msglist, GRelation *relation)
1462 {
1463         gchar *destdir, *dir;
1464         GSList *numlist = NULL, *cur;
1465         MsgInfo *msginfo;
1466         IMAPSession *session;
1467         gint ok = IMAP_SUCCESS;
1468         GRelation *uid_mapping;
1469         
1470         g_return_val_if_fail(folder != NULL, -1);
1471         g_return_val_if_fail(dest != NULL, -1);
1472         g_return_val_if_fail(msglist != NULL, -1);
1473
1474         debug_print("getting session...\n");
1475         session = imap_session_get(folder);
1476         if (!session) {
1477                 return -1;
1478         }
1479
1480         msginfo = (MsgInfo *)msglist->data;
1481
1482         ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder->path,
1483                          NULL, NULL, NULL, NULL, FALSE);
1484         if (ok != IMAP_SUCCESS) {
1485                 unlock_session(session);
1486                 return ok;
1487         }
1488
1489         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path);
1490         for (cur = msglist; cur; cur = cur->next) {
1491                 msginfo = (MsgInfo *)cur->data;
1492                 if (!MSG_IS_DELETED(msginfo->flags))
1493                         numlist = g_slist_prepend(numlist, GINT_TO_POINTER(msginfo->msgnum));
1494         }
1495         numlist = g_slist_reverse(numlist);
1496
1497         uid_mapping = g_relation_new(2);
1498         g_relation_index(uid_mapping, 0, g_direct_hash, g_direct_equal);
1499
1500         ok = imap_set_message_flags
1501                 (session, numlist, IMAP_FLAG_DELETED, TRUE);
1502         if (ok != IMAP_SUCCESS) {
1503                 log_warning(LOG_PROTOCOL, _("can't set deleted flags\n"));
1504                 unlock_session(session);
1505                 return ok;
1506         }
1507         ok = imap_cmd_expunge(session);
1508         if (ok != IMAP_SUCCESS) {
1509                 log_warning(LOG_PROTOCOL, _("can't expunge\n"));
1510                 unlock_session(session);
1511                 return ok;
1512         }
1513         
1514         dir = folder_item_get_path(msginfo->folder);
1515         if (is_dir_exist(dir)) {
1516                 for (cur = msglist; cur; cur = cur->next) {
1517                         msginfo = (MsgInfo *)cur->data;
1518                         remove_numbered_files(dir, msginfo->msgnum, msginfo->msgnum);
1519                 }
1520         }
1521         g_free(dir);
1522
1523         g_relation_destroy(uid_mapping);
1524         g_slist_free(numlist);
1525
1526         g_free(destdir);
1527         unlock_session(session);
1528         if (ok == IMAP_SUCCESS)
1529                 return 0;
1530         else
1531                 return -1;
1532 }
1533
1534 static gint imap_remove_msgs(Folder *folder, FolderItem *dest, 
1535                     MsgInfoList *msglist, GRelation *relation)
1536 {
1537         MsgInfo *msginfo;
1538
1539         g_return_val_if_fail(folder != NULL, -1);
1540         g_return_val_if_fail(dest != NULL, -1);
1541         if (msglist == NULL)
1542                 return 0;
1543
1544         msginfo = (MsgInfo *)msglist->data;
1545         g_return_val_if_fail(msginfo->folder != NULL, -1);
1546
1547         return imap_do_remove_msgs(folder, dest, msglist, relation);
1548 }
1549
1550 static gint imap_remove_all_msg(Folder *folder, FolderItem *item)
1551 {
1552         GSList *list = folder_item_get_msg_list(item);
1553         gint res = imap_remove_msgs(folder, item, list, NULL);
1554         procmsg_msg_list_free(list);
1555         return res;
1556 }
1557
1558 static gboolean imap_is_msg_changed(Folder *folder, FolderItem *item,
1559                                     MsgInfo *msginfo)
1560 {
1561         /* TODO: properly implement this method */
1562         return FALSE;
1563 }
1564
1565 static gint imap_close(Folder *folder, FolderItem *item)
1566 {
1567         return 0;
1568 }
1569
1570 gint imap_scan_tree_real(Folder *folder, gboolean subs_only)
1571 {
1572         FolderItem *item = NULL;
1573         IMAPSession *session;
1574         gchar *root_folder = NULL;
1575
1576         g_return_val_if_fail(folder != NULL, -1);
1577         g_return_val_if_fail(folder->account != NULL, -1);
1578
1579         debug_print("getting session...\n");
1580         session = imap_session_get(folder);
1581         if (!session) {
1582                 if (!folder->node) {
1583                         folder_tree_destroy(folder);
1584                         item = folder_item_new(folder, folder->name, NULL);
1585                         item->folder = folder;
1586                         folder->node = item->node = g_node_new(item);
1587                 }
1588                 return -1;
1589         }
1590
1591         if (folder->account->imap_dir && *folder->account->imap_dir) {
1592                 gchar *real_path;
1593                 int r;
1594                 clist * lep_list;
1595
1596                 Xstrdup_a(root_folder, folder->account->imap_dir, {unlock_session(session);return -1;});
1597                 extract_quote(root_folder, '"');
1598                 subst_char(root_folder,
1599                            imap_get_path_separator(session, IMAP_FOLDER(folder),
1600                                                    root_folder),
1601                            '/');
1602                 strtailchomp(root_folder, '/');
1603                 real_path = imap_get_real_path
1604                         (session, IMAP_FOLDER(folder), root_folder);
1605                 debug_print("IMAP root directory: %s\n", real_path);
1606
1607                 /* check if root directory exist */
1608
1609                 r = imap_threaded_list(session->folder, "", real_path,
1610                                        &lep_list);
1611                 if ((r != MAILIMAP_NO_ERROR) || (clist_count(lep_list) == 0)) {
1612                         if (!folder->node) {
1613                                 item = folder_item_new(folder, folder->name, NULL);
1614                                 item->folder = folder;
1615                                 folder->node = item->node = g_node_new(item);
1616                         }
1617                         unlock_session(session);
1618                         return -1;
1619                 }
1620                 mailimap_list_result_free(lep_list);
1621                                 
1622                 g_free(real_path);
1623         }
1624
1625         if (folder->node)
1626                 item = FOLDER_ITEM(folder->node->data);
1627                 
1628         if (item && !item->path && root_folder) {
1629                 item->path = g_strdup(root_folder);
1630         }
1631
1632         if (!item || ((item->path || root_folder) &&
1633                       strcmp2(item->path, root_folder) != 0)) {
1634                 folder_tree_destroy(folder);
1635                 item = folder_item_new(folder, folder->name, root_folder);
1636                 item->folder = folder;
1637                 folder->node = item->node = g_node_new(item);
1638         }
1639
1640         imap_scan_tree_recursive(session, FOLDER_ITEM(folder->node->data), subs_only);
1641         imap_create_missing_folders(folder);
1642         unlock_session(session);
1643
1644         return 0;
1645 }
1646
1647 static gint imap_scan_tree(Folder *folder)
1648 {
1649         gboolean subs_only = FALSE;
1650         if (folder->account) {
1651                 debug_print(" scanning only subs %d\n", folder->account->imap_subsonly);
1652                 subs_only = folder->account->imap_subsonly;
1653         }
1654         return imap_scan_tree_real(folder, subs_only);
1655 }
1656
1657 static gint imap_scan_tree_recursive(IMAPSession *session, FolderItem *item, gboolean subs_only)
1658 {
1659         Folder *folder;
1660         IMAPFolder *imapfolder;
1661         FolderItem *new_item;
1662         GSList *item_list, *cur;
1663         GNode *node;
1664         gchar *real_path;
1665         gchar *wildcard_path;
1666         gchar separator;
1667         gchar wildcard[3];
1668         clist * lep_list;
1669         int r;
1670         
1671         g_return_val_if_fail(item != NULL, -1);
1672         g_return_val_if_fail(item->folder != NULL, -1);
1673         g_return_val_if_fail(item->no_sub == FALSE, -1);
1674
1675         folder = item->folder;
1676         imapfolder = IMAP_FOLDER(folder);
1677
1678         separator = imap_get_path_separator(session, imapfolder, item->path);
1679
1680         if (folder->ui_func)
1681                 folder->ui_func(folder, item, folder->ui_func_data);
1682
1683         if (item->path) {
1684                 wildcard[0] = separator;
1685                 wildcard[1] = '%';
1686                 wildcard[2] = '\0';
1687                 real_path = imap_get_real_path(session, imapfolder, item->path);
1688         } else {
1689                 wildcard[0] = '%';
1690                 wildcard[1] = '\0';
1691                 real_path = g_strdup("");
1692         }
1693
1694         Xstrcat_a(wildcard_path, real_path, wildcard,
1695                   {g_free(real_path); return IMAP_ERROR;});
1696         lep_list = NULL;
1697         
1698         if (subs_only)
1699                 r = imap_threaded_lsub(folder, "", wildcard_path, &lep_list);
1700         else
1701                 r = imap_threaded_list(folder, "", wildcard_path, &lep_list);
1702
1703         if (r != MAILIMAP_NO_ERROR) {
1704                 item_list = NULL;
1705         }
1706         else {
1707                 item_list = imap_list_from_lep(imapfolder,
1708                                                lep_list, real_path, FALSE);
1709                 mailimap_list_result_free(lep_list);
1710         }
1711         
1712         g_free(real_path);
1713
1714         node = item->node->children;
1715         while (node != NULL) {
1716                 FolderItem *old_item = FOLDER_ITEM(node->data);
1717                 GNode *next = node->next;
1718
1719                 new_item = NULL;
1720                 for (cur = item_list; cur != NULL; cur = cur->next) {
1721                         FolderItem *cur_item = FOLDER_ITEM(cur->data);
1722                         if (!strcmp2(old_item->path, cur_item->path)) {
1723                                 new_item = cur_item;
1724                                 break;
1725                         }
1726                 }
1727                 if (!new_item) {
1728                         if (old_item && old_item->path && !strcmp(old_item->path, "INBOX")) {
1729                                 debug_print("not removing INBOX\n");
1730                         } else {
1731                                 debug_print("folder '%s' not found. removing...\n",
1732                                             old_item->path);
1733                                 folder_item_remove(old_item);
1734                         }
1735                 } else {
1736                         old_item->no_sub = new_item->no_sub;
1737                         old_item->no_select = new_item->no_select;
1738                         if (old_item->no_sub == TRUE && node->children) {
1739                                 debug_print("folder '%s' doesn't have "
1740                                             "subfolders. removing...\n",
1741                                             old_item->path);
1742                                 folder_item_remove_children(old_item);
1743                         }
1744                 }
1745
1746                 node = next;
1747         }
1748
1749         for (cur = item_list; cur != NULL; cur = cur->next) {
1750                 FolderItem *cur_item = FOLDER_ITEM(cur->data);
1751                 new_item = NULL;
1752
1753                 for (node = item->node->children; node != NULL;
1754                      node = node->next) {
1755                         if (!strcmp2(FOLDER_ITEM(node->data)->path,
1756                                      cur_item->path)) {
1757                                 new_item = FOLDER_ITEM(node->data);
1758                                 folder_item_destroy(cur_item);
1759                                 cur_item = NULL;
1760                                 break;
1761                         }
1762                 }
1763                 if (!new_item) {
1764                         new_item = cur_item;
1765                         debug_print("new folder '%s' found.\n", new_item->path);
1766                         folder_item_append(item, new_item);
1767                 }
1768
1769                 if (!strcmp(new_item->path, "INBOX")) {
1770                         new_item->stype = F_INBOX;
1771                         folder->inbox = new_item;
1772                 } else if (!folder_item_parent(item) || item->stype == F_INBOX) {
1773                         gchar *base;
1774
1775                         base = g_path_get_basename(new_item->path);
1776
1777                         if (!folder->outbox && !g_ascii_strcasecmp(base, "Sent")) {
1778                                 new_item->stype = F_OUTBOX;
1779                                 folder->outbox = new_item;
1780                         } else if (!folder->draft && !g_ascii_strcasecmp(base, "Drafts")) {
1781                                 new_item->stype = F_DRAFT;
1782                                 folder->draft = new_item;
1783                         } else if (!folder->queue && !g_ascii_strcasecmp(base, "Queue")) {
1784                                 new_item->stype = F_QUEUE;
1785                                 folder->queue = new_item;
1786                         } else if (!folder->trash && !g_ascii_strcasecmp(base, "Trash")) {
1787                                 new_item->stype = F_TRASH;
1788                                 folder->trash = new_item;
1789                         }
1790                         g_free(base);
1791                 }
1792
1793                 if (new_item->no_sub == FALSE)
1794                         imap_scan_tree_recursive(session, new_item, subs_only);
1795         }
1796
1797         g_slist_free(item_list);
1798
1799         return IMAP_SUCCESS;
1800 }
1801
1802 GList *imap_scan_subtree(Folder *folder, FolderItem *item, gboolean unsubs_only, gboolean recursive)
1803 {
1804         IMAPSession *session = imap_session_get(folder);
1805         gchar *real_path;
1806         gchar *wildcard_path;
1807         gchar separator;
1808         gchar wildcard[3];
1809         clist * lep_list;
1810         GSList *item_list = NULL, *cur;
1811         GList *child_list = NULL, *tmplist = NULL;
1812         GSList *sub_list = NULL;
1813         int r;
1814
1815         if (!session)
1816                 return NULL;
1817
1818         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), item->path);
1819
1820         if (item->path) {
1821                 wildcard[0] = separator;
1822                 wildcard[1] = '%';
1823                 wildcard[2] = '\0';
1824                 real_path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path);
1825         } else {
1826                 wildcard[0] = '%';
1827                 wildcard[1] = '\0';
1828                 real_path = g_strdup("");
1829         }
1830
1831         Xstrcat_a(wildcard_path, real_path, wildcard,
1832                   {g_free(real_path); return NULL;});
1833         lep_list = NULL;
1834         
1835         if (unsubs_only)
1836                 statusbar_print_all(_("Looking for unsubscribed folders in %s..."), 
1837                                 item->path?item->path:item->name);
1838         else
1839                 statusbar_print_all(_("Looking for subfolders of %s..."), 
1840                                 item->path?item->path:item->name);
1841
1842         r = imap_threaded_list(folder, "", wildcard_path, &lep_list);
1843         if (r) {
1844                 statusbar_pop_all();
1845                 return NULL;
1846         }
1847         item_list = imap_list_from_lep(IMAP_FOLDER(folder),
1848                                lep_list, real_path, FALSE);
1849         mailimap_list_result_free(lep_list);
1850
1851         for (cur = item_list; cur != NULL; cur = cur->next) {
1852                 FolderItem *cur_item = FOLDER_ITEM(cur->data);
1853                 if (recursive) {
1854                         tmplist = imap_scan_subtree(folder, cur_item, 
1855                                         unsubs_only, recursive);
1856                         if (tmplist)
1857                                 child_list = g_list_concat(child_list, tmplist);
1858                 }
1859                 child_list = g_list_prepend(child_list,
1860                                 imap_get_real_path(session, 
1861                                         IMAP_FOLDER(folder), cur_item->path));
1862                 
1863                 folder_item_destroy(cur_item);
1864         }
1865         child_list = g_list_reverse(child_list);
1866         g_slist_free(item_list);
1867
1868         if (unsubs_only) {
1869                 r = imap_threaded_lsub(folder, "", wildcard_path, &lep_list);
1870                 if (r) {
1871                         statusbar_pop_all();
1872                         return NULL;
1873                 }
1874                 sub_list = imap_list_from_lep(IMAP_FOLDER(folder),
1875                                        lep_list, real_path, FALSE);
1876                 mailimap_list_result_free(lep_list);
1877
1878                 for (cur = sub_list; cur != NULL; cur = cur->next) {
1879                         FolderItem *cur_item = FOLDER_ITEM(cur->data);
1880                         GList *oldlitem = NULL;
1881                         gchar *tmp = imap_get_real_path(session, 
1882                                         IMAP_FOLDER(folder), cur_item->path);
1883                         folder_item_destroy(cur_item);
1884                         oldlitem = g_list_find_custom(
1885                                         child_list, tmp, (GCompareFunc)strcmp2);
1886                         if (oldlitem) {
1887                                 child_list = g_list_remove_link(child_list, oldlitem);
1888                                 g_free(oldlitem->data);
1889                                 g_list_free(oldlitem);
1890                         }
1891                         g_free(tmp);
1892                 }
1893         }
1894
1895         statusbar_pop_all();
1896
1897         return child_list;
1898 }
1899
1900 static gint imap_create_tree(Folder *folder)
1901 {
1902         g_return_val_if_fail(folder != NULL, -1);
1903         g_return_val_if_fail(folder->node != NULL, -1);
1904         g_return_val_if_fail(folder->node->data != NULL, -1);
1905         g_return_val_if_fail(folder->account != NULL, -1);
1906
1907         imap_scan_tree(folder);
1908         imap_create_missing_folders(folder);
1909
1910         return 0;
1911 }
1912
1913 static void imap_create_missing_folders(Folder *folder)
1914 {
1915         g_return_if_fail(folder != NULL);
1916
1917         if (!folder->inbox)
1918                 folder->inbox = imap_create_special_folder
1919                         (folder, F_INBOX, "INBOX");
1920         if (!folder->trash)
1921                 folder->trash = imap_create_special_folder
1922                         (folder, F_TRASH, "Trash");
1923         if (!folder->queue)
1924                 folder->queue = imap_create_special_folder
1925                         (folder, F_QUEUE, "Queue");
1926         if (!folder->outbox)
1927                 folder->outbox = imap_create_special_folder
1928                         (folder, F_OUTBOX, "Sent");
1929         if (!folder->draft)
1930                 folder->draft = imap_create_special_folder
1931                         (folder, F_DRAFT, "Drafts");
1932 }
1933
1934 static FolderItem *imap_create_special_folder(Folder *folder,
1935                                               SpecialFolderItemType stype,
1936                                               const gchar *name)
1937 {
1938         FolderItem *item;
1939         FolderItem *new_item;
1940
1941         g_return_val_if_fail(folder != NULL, NULL);
1942         g_return_val_if_fail(folder->node != NULL, NULL);
1943         g_return_val_if_fail(folder->node->data != NULL, NULL);
1944         g_return_val_if_fail(folder->account != NULL, NULL);
1945         g_return_val_if_fail(name != NULL, NULL);
1946
1947         item = FOLDER_ITEM(folder->node->data);
1948         new_item = imap_create_folder(folder, item, name);
1949
1950         if (!new_item) {
1951                 g_warning("Can't create '%s'\n", name);
1952                 if (!folder->inbox) return NULL;
1953
1954                 new_item = imap_create_folder(folder, folder->inbox, name);
1955                 if (!new_item)
1956                         g_warning("Can't create '%s' under INBOX\n", name);
1957                 else
1958                         new_item->stype = stype;
1959         } else
1960                 new_item->stype = stype;
1961
1962         return new_item;
1963 }
1964
1965 static gchar *imap_folder_get_path(Folder *folder)
1966 {
1967         gchar *folder_path;
1968
1969         g_return_val_if_fail(folder != NULL, NULL);
1970         g_return_val_if_fail(folder->account != NULL, NULL);
1971
1972         folder_path = g_strconcat(get_imap_cache_dir(),
1973                                   G_DIR_SEPARATOR_S,
1974                                   folder->account->recv_server,
1975                                   G_DIR_SEPARATOR_S,
1976                                   folder->account->userid,
1977                                   NULL);
1978
1979         return folder_path;
1980 }
1981
1982 static gchar *imap_item_get_path(Folder *folder, FolderItem *item)
1983 {
1984         gchar *folder_path, *path;
1985
1986         g_return_val_if_fail(folder != NULL, NULL);
1987         g_return_val_if_fail(item != NULL, NULL);
1988         folder_path = imap_folder_get_path(folder);
1989
1990         g_return_val_if_fail(folder_path != NULL, NULL);
1991         if (folder_path[0] == G_DIR_SEPARATOR) {
1992                 if (item->path)
1993                         path = g_strconcat(folder_path, G_DIR_SEPARATOR_S,
1994                                            item->path, NULL);
1995                 else
1996                         path = g_strdup(folder_path);
1997         } else {
1998                 if (item->path)
1999                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
2000                                            folder_path, G_DIR_SEPARATOR_S,
2001                                            item->path, NULL);
2002                 else
2003                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
2004                                            folder_path, NULL);
2005         }
2006         g_free(folder_path);
2007
2008         return path;
2009 }
2010
2011 static FolderItem *imap_create_folder(Folder *folder, FolderItem *parent,
2012                                const gchar *name)
2013 {
2014         gchar *dirpath, *imap_path;
2015         IMAPSession *session;
2016         FolderItem *new_item;
2017         gchar separator;
2018         gchar *new_name;
2019         const gchar *p;
2020         gint ok;
2021         gboolean no_select = FALSE, no_sub = FALSE;
2022         gboolean exist = FALSE;
2023         
2024         g_return_val_if_fail(folder != NULL, NULL);
2025         g_return_val_if_fail(folder->account != NULL, NULL);
2026         g_return_val_if_fail(parent != NULL, NULL);
2027         g_return_val_if_fail(name != NULL, NULL);
2028
2029         debug_print("getting session...\n");
2030         session = imap_session_get(folder);
2031         if (!session) {
2032                 return NULL;
2033         }
2034
2035         if (!folder_item_parent(parent) && strcmp(name, "INBOX") == 0) {
2036                 dirpath = g_strdup(name);
2037         }else if (parent->path)
2038                 dirpath = g_strconcat(parent->path, "/", name, NULL);
2039         else if ((p = strchr(name, '/')) != NULL && *(p + 1) != '\0')
2040                 dirpath = g_strdup(name);
2041         else if (folder->account->imap_dir && *folder->account->imap_dir) {
2042                 gchar *imap_dir;
2043
2044                 Xstrdup_a(imap_dir, folder->account->imap_dir, {unlock_session(session);return NULL;});
2045                 strtailchomp(imap_dir, '/');
2046                 dirpath = g_strconcat(imap_dir, "/", name, NULL);
2047         } else
2048                 dirpath = g_strdup(name);
2049                 
2050         
2051
2052         /* keep trailing directory separator to create a folder that contains
2053            sub folder */
2054         imap_path = imap_utf8_to_modified_utf7(dirpath);
2055
2056         strtailchomp(dirpath, '/');
2057         Xstrdup_a(new_name, name, {
2058                 g_free(dirpath); 
2059                 unlock_session(session);                
2060                 return NULL;});
2061
2062         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), imap_path);
2063         imap_path_separator_subst(imap_path, separator);
2064         /* remove trailing / for display */
2065         strtailchomp(new_name, '/');
2066
2067         if (strcmp(dirpath, "INBOX") != 0) {
2068                 GPtrArray *argbuf;
2069                 int r;
2070                 clist * lep_list;
2071                 
2072                 argbuf = g_ptr_array_new();
2073                 r = imap_threaded_list(folder, "", imap_path, &lep_list);
2074                 if (r != MAILIMAP_NO_ERROR) {
2075                         log_warning(LOG_PROTOCOL, _("can't create mailbox: LIST failed\n"));
2076                         g_free(imap_path);
2077                         g_free(dirpath);
2078                         ptr_array_free_strings(argbuf);
2079                         g_ptr_array_free(argbuf, TRUE);
2080                         unlock_session(session);
2081                         return NULL;
2082                 }
2083                 
2084                 if (clist_count(lep_list) > 0)
2085                         exist = TRUE;
2086                 mailimap_list_result_free(lep_list);
2087                 lep_list = NULL;
2088                 if (!exist) {
2089                         ok = imap_cmd_create(session, imap_path);
2090                         if (ok != IMAP_SUCCESS) {
2091                                 log_warning(LOG_PROTOCOL, _("can't create mailbox\n"));
2092                                 g_free(imap_path);
2093                                 g_free(dirpath);
2094                                 unlock_session(session);
2095                                 return NULL;
2096                         }
2097                         r = imap_threaded_list(folder, "", imap_path, &lep_list);
2098                         if (r == MAILIMAP_NO_ERROR) {
2099                                 GSList *item_list = imap_list_from_lep(IMAP_FOLDER(folder),
2100                                                lep_list, dirpath, TRUE);
2101                                 if (item_list) {
2102                                         FolderItem *cur_item = FOLDER_ITEM(item_list->data);
2103                                         no_select = cur_item->no_select;
2104                                         no_sub = cur_item->no_sub;
2105                                         g_slist_free(item_list);
2106                                 } 
2107                                 mailimap_list_result_free(lep_list);
2108                         }
2109                 }
2110                 imap_threaded_subscribe(folder, imap_path, TRUE);
2111         } else {
2112                 clist *lep_list;
2113                 int r;
2114                 /* just get flags */
2115                 r = imap_threaded_list(folder, "", "INBOX", &lep_list);
2116                 if (r == MAILIMAP_NO_ERROR) {
2117                         GSList *item_list = imap_list_from_lep(IMAP_FOLDER(folder),
2118                                        lep_list, dirpath, TRUE);
2119                         if (item_list) {
2120                                 FolderItem *cur_item = FOLDER_ITEM(item_list->data);
2121                                 no_select = cur_item->no_select;
2122                                 no_sub = cur_item->no_sub;
2123                                 g_slist_free(item_list);
2124                         } 
2125                         mailimap_list_result_free(lep_list);
2126                 }
2127         }
2128
2129         new_item = folder_item_new(folder, new_name, dirpath);
2130         new_item->no_select = no_select;
2131         new_item->no_sub = no_sub;
2132         folder_item_append(parent, new_item);
2133         g_free(imap_path);
2134         g_free(dirpath);
2135
2136         dirpath = folder_item_get_path(new_item);
2137         if (!is_dir_exist(dirpath))
2138                 make_dir_hier(dirpath);
2139         g_free(dirpath);
2140         unlock_session(session);
2141
2142         if (exist) {
2143                 /* folder existed, scan it */
2144                 folder_item_scan_full(new_item, FALSE);
2145         }
2146
2147         return new_item;
2148 }
2149
2150 static gint imap_rename_folder(Folder *folder, FolderItem *item,
2151                                const gchar *name)
2152 {
2153         gchar *dirpath;
2154         gchar *newpath;
2155         gchar *real_oldpath;
2156         gchar *real_newpath;
2157         gchar *paths[2];
2158         gchar *old_cache_dir;
2159         gchar *new_cache_dir;
2160         IMAPSession *session;
2161         gchar separator;
2162         gint ok;
2163         gint exists, recent, unseen;
2164         guint32 uid_validity;
2165
2166         g_return_val_if_fail(folder != NULL, -1);
2167         g_return_val_if_fail(item != NULL, -1);
2168         g_return_val_if_fail(item->path != NULL, -1);
2169         g_return_val_if_fail(name != NULL, -1);
2170
2171         debug_print("getting session...\n");
2172         session = imap_session_get(folder);
2173         if (!session) {
2174                 return -1;
2175         }
2176
2177         if (strchr(name, imap_get_path_separator(session, IMAP_FOLDER(folder), item->path)) != NULL) {
2178                 g_warning(_("New folder name must not contain the namespace "
2179                             "path separator"));
2180                 unlock_session(session);
2181                 return -1;
2182         }
2183
2184         real_oldpath = imap_get_real_path(session, IMAP_FOLDER(folder), item->path);
2185
2186         g_free(session->mbox);
2187         session->mbox = NULL;
2188         ok = imap_cmd_examine(session, "INBOX",
2189                               &exists, &recent, &unseen, &uid_validity, FALSE);
2190         if (ok != IMAP_SUCCESS) {
2191                 g_free(real_oldpath);
2192                 unlock_session(session);
2193                 return -1;
2194         }
2195
2196         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), item->path);
2197         if (strchr(item->path, G_DIR_SEPARATOR)) {
2198                 dirpath = g_path_get_dirname(item->path);
2199                 newpath = g_strconcat(dirpath, G_DIR_SEPARATOR_S, name, NULL);
2200                 g_free(dirpath);
2201         } else
2202                 newpath = g_strdup(name);
2203
2204         real_newpath = imap_utf8_to_modified_utf7(newpath);
2205         imap_path_separator_subst(real_newpath, separator);
2206
2207         ok = imap_cmd_rename(session, real_oldpath, real_newpath);
2208         if (ok != IMAP_SUCCESS) {
2209                 log_warning(LOG_PROTOCOL, _("can't rename mailbox: %s to %s\n"),
2210                             real_oldpath, real_newpath);
2211                 g_free(real_oldpath);
2212                 g_free(newpath);
2213                 g_free(real_newpath);
2214                 unlock_session(session);
2215                 return -1;
2216         }
2217         g_free(item->name);
2218         item->name = g_strdup(name);
2219
2220         old_cache_dir = folder_item_get_path(item);
2221
2222         paths[0] = g_strdup(item->path);
2223         paths[1] = newpath;
2224         g_node_traverse(item->node, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
2225                         imap_rename_folder_func, paths);
2226
2227         if (is_dir_exist(old_cache_dir)) {
2228                 new_cache_dir = folder_item_get_path(item);
2229                 if (rename(old_cache_dir, new_cache_dir) < 0) {
2230                         FILE_OP_ERROR(old_cache_dir, "rename");
2231                 }
2232                 g_free(new_cache_dir);
2233         }
2234
2235         g_free(old_cache_dir);
2236         g_free(paths[0]);
2237         g_free(newpath);
2238         g_free(real_oldpath);
2239         g_free(real_newpath);
2240         unlock_session(session);
2241         return 0;
2242 }
2243
2244 gint imap_subscribe(Folder *folder, FolderItem *item, gchar *rpath, gboolean sub)
2245 {
2246         gchar *path;
2247         gint r = -1;
2248         IMAPSession *session;
2249         debug_print("getting session...\n");
2250
2251         session = imap_session_get(folder);
2252         if (!session) {
2253                 return -1;
2254         }
2255         if (item && item->path) {
2256                 path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path);
2257                 if (!path)
2258                         return -1;
2259                 if (!strcmp(path, "INBOX") && sub == FALSE)
2260                         return -1;
2261                 debug_print("%ssubscribing %s\n", sub?"":"un", path);
2262                 r = imap_threaded_subscribe(folder, path, sub);
2263                 g_free(path);
2264         } else if (rpath) {
2265                 r = imap_threaded_subscribe(folder, rpath, sub);
2266         } else
2267                 return -1;
2268         return r;
2269 }
2270
2271 static gint imap_remove_folder_real(Folder *folder, FolderItem *item)
2272 {
2273         gint ok;
2274         IMAPSession *session;
2275         gchar *path;
2276         gchar *cache_dir;
2277
2278         g_return_val_if_fail(folder != NULL, -1);
2279         g_return_val_if_fail(item != NULL, -1);
2280         g_return_val_if_fail(item->path != NULL, -1);
2281
2282         debug_print("getting session...\n");
2283         session = imap_session_get(folder);
2284         if (!session) {
2285                 return -1;
2286         }
2287         path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path);
2288
2289         imap_threaded_subscribe(folder, path, FALSE);
2290         ok = imap_cmd_delete(session, path);
2291         if (ok != IMAP_SUCCESS) {
2292                 gchar *tmp = g_strdup_printf("%s%c", path, 
2293                                 imap_get_path_separator(session, IMAP_FOLDER(folder), path));
2294                 g_free(path);
2295                 path = tmp;
2296                 ok = imap_cmd_delete(session, path);
2297         }
2298
2299         if (ok != IMAP_SUCCESS) {
2300                 log_warning(LOG_PROTOCOL, _("can't delete mailbox\n"));
2301                 g_free(path);
2302                 unlock_session(session);
2303                 return -1;
2304         }
2305
2306         g_free(path);
2307         cache_dir = folder_item_get_path(item);
2308         if (is_dir_exist(cache_dir) && remove_dir_recursive(cache_dir) < 0)
2309                 g_warning("can't remove directory '%s'\n", cache_dir);
2310         g_free(cache_dir);
2311         folder_item_remove(item);
2312         unlock_session(session);
2313         return 0;
2314 }
2315
2316 static gint imap_remove_folder(Folder *folder, FolderItem *item)
2317 {
2318         GNode *node, *next;
2319
2320         g_return_val_if_fail(item != NULL, -1);
2321         g_return_val_if_fail(item->folder != NULL, -1);
2322         g_return_val_if_fail(item->node != NULL, -1);
2323
2324         node = item->node->children;
2325         while (node != NULL) {
2326                 next = node->next;
2327                 if (imap_remove_folder(folder, FOLDER_ITEM(node->data)) < 0)
2328                         return -1;
2329                 node = next;
2330         }
2331         debug_print("IMAP removing %s\n", item->path);
2332
2333         if (imap_remove_all_msg(folder, item) < 0)
2334                 return -1;
2335         return imap_remove_folder_real(folder, item);
2336 }
2337
2338 typedef struct _uncached_data {
2339         IMAPSession *session;
2340         FolderItem *item;
2341         MsgNumberList *numlist;
2342         guint cur;
2343         guint total;
2344         gboolean done;
2345 } uncached_data;
2346
2347 static void *imap_get_uncached_messages_thread(void *data)
2348 {
2349         uncached_data *stuff = (uncached_data *)data;
2350         IMAPSession *session = stuff->session;
2351         FolderItem *item = stuff->item;
2352         MsgNumberList *numlist = stuff->numlist;
2353         
2354         GSList *newlist = NULL;
2355         GSList *llast = NULL;
2356         GSList *seq_list, *cur;
2357
2358         debug_print("uncached_messages\n");
2359         
2360         if (session == NULL || item == NULL || item->folder == NULL
2361             || FOLDER_CLASS(item->folder) != &imap_class) {
2362                 stuff->done = TRUE;
2363                 return NULL;
2364         }
2365         
2366         seq_list = imap_get_lep_set_from_numlist(numlist);
2367         debug_print("get msgs info\n");
2368         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
2369                 struct mailimap_set * imapset;
2370                 unsigned int i;
2371                 int r;
2372                 carray * env_list;
2373                 int count;
2374                 
2375                 if (session->cancelled)
2376                         break;
2377                 
2378                 imapset = cur->data;
2379                 
2380                 r = imap_threaded_fetch_env(session->folder,
2381                                             imapset, &env_list);
2382                 if (r != MAILIMAP_NO_ERROR)
2383                         continue;
2384                 
2385                 session_set_access_time(SESSION(session));
2386
2387                 count = 0;
2388                 for(i = 0 ; i < carray_count(env_list) ; i ++) {
2389                         struct imap_fetch_env_info * info;
2390                         MsgInfo * msginfo;
2391                         
2392                         info = carray_get(env_list, i);
2393                         msginfo = imap_envelope_from_lep(info, item);
2394                         if (msginfo == NULL)
2395                                 continue;
2396                         msginfo->folder = item;
2397                         if (!newlist)
2398                                 llast = newlist = g_slist_append(newlist, msginfo);
2399                         else {
2400                                 llast = g_slist_append(llast, msginfo);
2401                                 llast = llast->next;
2402                         }
2403                         count ++;
2404                 }
2405                 
2406                 imap_fetch_env_free(env_list);
2407         }
2408         
2409         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
2410                 struct mailimap_set * imapset;
2411                 
2412                 imapset = cur->data;
2413                 mailimap_set_free(imapset);
2414         }
2415         
2416         session_set_access_time(SESSION(session));
2417         stuff->done = TRUE;
2418         return newlist;
2419 }
2420
2421 #define MAX_MSG_NUM 50
2422
2423 static GSList *imap_get_uncached_messages(IMAPSession *session,
2424                                         FolderItem *item,
2425                                         MsgNumberList *numlist)
2426 {
2427         GSList *result = NULL;
2428         GSList * cur;
2429         uncached_data *data = g_new0(uncached_data, 1);
2430         int finished;
2431         
2432         finished = 0;
2433         cur = numlist;
2434         data->total = g_slist_length(numlist);
2435         debug_print("messages list : %i\n", data->total);
2436
2437         while (cur != NULL) {
2438                 GSList * partial_result;
2439                 int count;
2440                 GSList * newlist;
2441                 GSList * llast;
2442                 
2443                 llast = NULL;
2444                 count = 0;
2445                 newlist = NULL;
2446                 while (count < MAX_MSG_NUM) {
2447                         void * p;
2448                         
2449                         p = cur->data;
2450                         
2451                         if (newlist == NULL)
2452                                 llast = newlist = g_slist_append(newlist, p);
2453                         else {
2454                                 llast = g_slist_append(llast, p);
2455                                 llast = llast->next;
2456                         }
2457                         count ++;
2458                         
2459                         cur = cur->next;
2460                         if (cur == NULL)
2461                                 break;
2462                 }
2463                 
2464                 data->done = FALSE;
2465                 data->session = session;
2466                 data->item = item;
2467                 data->numlist = newlist;
2468                 data->cur += count;
2469                 
2470                 if (prefs_common.work_offline && 
2471                     !inc_offline_should_override(FALSE,
2472                         _("Claws Mail needs network access in order "
2473                           "to access the IMAP server."))) {
2474                         g_free(data);
2475                         return NULL;
2476                 }
2477                 
2478                 partial_result =
2479                         (GSList *)imap_get_uncached_messages_thread(data);
2480                 
2481                 statusbar_progress_all(data->cur,data->total, 1);
2482                 
2483                 g_slist_free(newlist);
2484                 
2485                 result = g_slist_concat(result, partial_result);
2486         }
2487         g_free(data);
2488         
2489         statusbar_progress_all(0,0,0);
2490         statusbar_pop_all();
2491         
2492         return result;
2493 }
2494
2495 static void imap_delete_all_cached_messages(FolderItem *item)
2496 {
2497         gchar *dir;
2498
2499         g_return_if_fail(item != NULL);
2500         g_return_if_fail(item->folder != NULL);
2501         g_return_if_fail(FOLDER_CLASS(item->folder) == &imap_class);
2502
2503         debug_print("Deleting all cached messages...\n");
2504
2505         dir = folder_item_get_path(item);
2506         if (is_dir_exist(dir))
2507                 remove_all_numbered_files(dir);
2508         g_free(dir);
2509
2510         debug_print("done.\n");
2511 }
2512
2513 gchar imap_get_path_separator_for_item(FolderItem *item)
2514 {
2515         Folder *folder = NULL;
2516         IMAPFolder *imap_folder = NULL;
2517         IMAPSession *session = NULL;
2518         gchar result = '/';
2519         
2520         if (!item)
2521                 return '/';
2522         folder = item->folder;
2523         
2524         if (!folder)
2525                 return '/';
2526         
2527         imap_folder = IMAP_FOLDER(folder);
2528         
2529         if (!imap_folder)
2530                 return '/';
2531         
2532         debug_print("getting session...");
2533         session = imap_session_get(FOLDER(folder));
2534         result = imap_get_path_separator(session, imap_folder, item->path);
2535         unlock_session(session);
2536         return result;
2537 }
2538
2539 static gchar imap_refresh_path_separator(IMAPSession *session, IMAPFolder *folder, const gchar *subfolder)
2540 {
2541         clist * lep_list;
2542         int r;
2543         gchar separator = '\0';
2544         
2545         g_return_val_if_fail(session != NULL, '/');
2546         r = imap_threaded_list((Folder *)folder, "", subfolder, &lep_list);
2547         
2548         if (r != MAILIMAP_NO_ERROR) {
2549                 log_warning(LOG_PROTOCOL, _("LIST failed\n"));
2550                 return '\0';
2551         }
2552
2553         if (clist_count(lep_list) > 0) {
2554                 clistiter * iter = clist_begin(lep_list); 
2555                 struct mailimap_mailbox_list * mb;
2556                 mb = clist_content(iter);
2557
2558                 separator = mb->mb_delimiter;
2559                 debug_print("got separator: %c\n", folder->last_seen_separator);
2560         }
2561         mailimap_list_result_free(lep_list);
2562         return separator;
2563 }
2564
2565 static gchar imap_get_path_separator(IMAPSession *session, IMAPFolder *folder, const gchar *path)
2566 {
2567         gchar separator = '/';
2568
2569         if (folder->last_seen_separator == 0) {
2570                 folder->last_seen_separator = imap_refresh_path_separator(session, folder, "");
2571         }
2572
2573         if (folder->last_seen_separator == 0) {
2574                 folder->last_seen_separator = imap_refresh_path_separator(session, folder, "INBOX");
2575         }
2576
2577         if (folder->last_seen_separator != 0) {
2578                 debug_print("using separator: %c\n", folder->last_seen_separator);
2579                 return folder->last_seen_separator;
2580         }
2581
2582         return separator;
2583 }
2584
2585 static gchar *imap_get_real_path(IMAPSession *session, IMAPFolder *folder, const gchar *path)
2586 {
2587         gchar *real_path;
2588         gchar separator;
2589
2590         g_return_val_if_fail(folder != NULL, NULL);
2591         g_return_val_if_fail(path != NULL, NULL);
2592
2593         real_path = imap_utf8_to_modified_utf7(path);
2594         separator = imap_get_path_separator(session, folder, path);
2595         imap_path_separator_subst(real_path, separator);
2596
2597         return real_path;
2598 }
2599
2600 static gint imap_set_message_flags(IMAPSession *session,
2601                                    MsgNumberList *numlist,
2602                                    IMAPFlags flags,
2603                                    gboolean is_set)
2604 {
2605         gint ok = 0;
2606         GSList *seq_list;
2607         GSList * cur;
2608
2609         seq_list = imap_get_lep_set_from_numlist(numlist);
2610         
2611         for(cur = seq_list ; cur != NULL ; cur = g_slist_next(cur)) {
2612                 struct mailimap_set * imapset;
2613                 
2614                 imapset = cur->data;
2615                 
2616                 ok = imap_cmd_store(session, imapset,
2617                                     flags, is_set);
2618         }
2619         
2620         imap_lep_set_free(seq_list);
2621         
2622         return IMAP_SUCCESS;
2623 }
2624
2625 typedef struct _select_data {
2626         IMAPSession *session;
2627         gchar *real_path;
2628         gint *exists;
2629         gint *recent;
2630         gint *unseen;
2631         guint32 *uid_validity;
2632         gboolean done;
2633 } select_data;
2634
2635 static gint imap_select(IMAPSession *session, IMAPFolder *folder,
2636                         const gchar *path,
2637                         gint *exists, gint *recent, gint *unseen,
2638                         guint32 *uid_validity, gboolean block)
2639 {
2640         gchar *real_path;
2641         gint ok;
2642         gint exists_, recent_, unseen_;
2643         guint32 uid_validity_;
2644         
2645         if (!exists && !recent && !unseen && !uid_validity) {
2646                 if (session->mbox && strcmp(session->mbox, path) == 0)
2647                         return IMAP_SUCCESS;
2648         }
2649         if (!exists)
2650                 exists = &exists_;
2651         if (!recent)
2652                 recent = &recent_;
2653         if (!unseen)
2654                 unseen = &unseen_;
2655         if (!uid_validity)
2656                 uid_validity = &uid_validity_;
2657
2658         g_free(session->mbox);
2659         session->mbox = NULL;
2660
2661         real_path = imap_get_real_path(session, folder, path);
2662
2663         ok = imap_cmd_select(session, real_path,
2664                              exists, recent, unseen, uid_validity, block);
2665         if (ok != IMAP_SUCCESS)
2666                 log_warning(LOG_PROTOCOL, _("can't select folder: %s\n"), real_path);
2667         else {
2668                 session->mbox = g_strdup(path);
2669                 session->folder_content_changed = FALSE;
2670         }
2671         g_free(real_path);
2672
2673         return ok;
2674 }
2675
2676 static gint imap_status(IMAPSession *session, IMAPFolder *folder,
2677                         const gchar *path, IMAPFolderItem *item,
2678                         gint *messages,
2679                         guint32 *uid_next, guint32 *uid_validity,
2680                         gint *unseen, gboolean block)
2681 {
2682         int r;
2683         clistiter * iter;
2684         struct mailimap_mailbox_data_status * data_status;
2685         int got_values;
2686         gchar *real_path;
2687         guint mask = 0;
2688         
2689         real_path = imap_get_real_path(session, folder, path);
2690
2691         if (messages) {
2692                 mask |= 1 << 0;
2693                 *messages = 0;
2694         }
2695         if (uid_next) {
2696                 mask |= 1 << 2;
2697                 *uid_next = 0;
2698         }
2699         if (uid_validity) {
2700                 mask |= 1 << 3;
2701                 *uid_validity = 0;
2702         }
2703         if (unseen) {
2704                 mask |= 1 << 4;
2705                 *unseen = 0;
2706         }
2707         r = imap_threaded_status(FOLDER(folder), real_path, 
2708                 &data_status, mask);
2709
2710         g_free(real_path);
2711         if (r != MAILIMAP_NO_ERROR) {
2712                 debug_print("status err %d\n", r);
2713                 return IMAP_ERROR;
2714         }
2715         
2716         if (data_status->st_info_list == NULL) {
2717                 mailimap_mailbox_data_status_free(data_status);
2718                 debug_print("status->st_info_list == NULL\n");
2719                 return IMAP_ERROR;
2720         }
2721         
2722         got_values = 0;
2723         for(iter = clist_begin(data_status->st_info_list) ; iter != NULL ;
2724             iter = clist_next(iter)) {
2725                 struct mailimap_status_info * info;             
2726                 
2727                 info = clist_content(iter);
2728                 switch (info->st_att) {
2729                 case MAILIMAP_STATUS_ATT_MESSAGES:
2730                         if (messages) {
2731                                 * messages = info->st_value;
2732                                 got_values |= 1 << 0;
2733                         }
2734                         break;
2735                         
2736                 case MAILIMAP_STATUS_ATT_UIDNEXT:
2737                         if (uid_next) {
2738                                 * uid_next = info->st_value;
2739                                 got_values |= 1 << 2;
2740                         }
2741                         break;
2742                         
2743                 case MAILIMAP_STATUS_ATT_UIDVALIDITY:
2744                         if (uid_validity) {
2745                                 * uid_validity = info->st_value;
2746                                 got_values |= 1 << 3;
2747                         }
2748                         break;
2749                         
2750                 case MAILIMAP_STATUS_ATT_UNSEEN:
2751                         if (unseen) {
2752                                 * unseen = info->st_value;
2753                                 got_values |= 1 << 4;
2754                         }
2755                         break;
2756                 }
2757         }
2758         mailimap_mailbox_data_status_free(data_status);
2759         
2760         if (got_values != mask) {
2761                 g_warning("status: incomplete values received (%d)\n", got_values);
2762         }
2763         return IMAP_SUCCESS;
2764 }
2765
2766 static void imap_free_capabilities(IMAPSession *session)
2767 {
2768         slist_free_strings(session->capability);
2769         g_slist_free(session->capability);
2770         session->capability = NULL;
2771 }
2772
2773 /* low-level IMAP4rev1 commands */
2774
2775 static gint imap_cmd_login(IMAPSession *session,
2776                            const gchar *user, const gchar *pass,
2777                            const gchar *type)
2778 {
2779         int r;
2780         gint ok;
2781
2782         if (!strcmp(type, "LOGIN") && imap_has_capability(session, "LOGINDISABLED")) {
2783                 gint ok = IMAP_ERROR;
2784                 if (imap_has_capability(session, "STARTTLS")) {
2785 #if USE_OPENSSL
2786                         log_warning(LOG_PROTOCOL, _("Server requires TLS to log in.\n"));
2787                         ok = imap_cmd_starttls(session);
2788                         if (ok != IMAP_SUCCESS) {
2789                                 log_warning(LOG_PROTOCOL, _("Can't start TLS session.\n"));
2790                                 return IMAP_ERROR;
2791                         } else {
2792                                 /* refresh capas */
2793                                 imap_free_capabilities(session);
2794                                 if (imap_get_capabilities(session) != MAILIMAP_NO_ERROR) {
2795                                         log_warning(LOG_PROTOCOL, _("Can't refresh capabilities.\n"));
2796                                         return IMAP_ERROR;
2797                                 }
2798                         }
2799 #else           
2800                         log_error(LOG_PROTOCOL, _("Connection to %s failed: "
2801                                         "server requires TLS, but Claws Mail "
2802                                         "has been compiled without OpenSSL "
2803                                         "support.\n"),
2804                                         SESSION(session)->server);
2805                         return IMAP_ERROR;
2806 #endif
2807                 } else {
2808                         log_error(LOG_PROTOCOL, _("Server logins are disabled.\n"));
2809                         return IMAP_ERROR;
2810                 }
2811         }
2812
2813         log_print(LOG_PROTOCOL, "IMAP4> Logging %s to %s using %s\n", 
2814                         user,
2815                         SESSION(session)->server,
2816                         type);
2817         r = imap_threaded_login(session->folder, user, pass, type);
2818         if (r != MAILIMAP_NO_ERROR) {
2819                 log_print(LOG_PROTOCOL, "IMAP4< Error logging in to %s\n",
2820                                 SESSION(session)->server);
2821                 ok = IMAP_ERROR;
2822         } else {
2823                 log_print(LOG_PROTOCOL, "IMAP4< Login to %s successful\n",
2824                                 SESSION(session)->server);
2825                 ok = IMAP_SUCCESS;
2826         }
2827         return ok;
2828 }
2829
2830 static gint imap_cmd_noop(IMAPSession *session)
2831 {
2832         int r;
2833         unsigned int exists;
2834         
2835         r = imap_threaded_noop(session->folder, &exists);
2836         if (r != MAILIMAP_NO_ERROR) {
2837                 debug_print("noop err %d\n", r);
2838                 return IMAP_ERROR;
2839         }
2840         session->exists = exists;
2841         session_set_access_time(SESSION(session));
2842
2843         return IMAP_SUCCESS;
2844 }
2845
2846 #if USE_OPENSSL
2847 static gint imap_cmd_starttls(IMAPSession *session)
2848 {
2849         int r;
2850         
2851         r = imap_threaded_starttls(session->folder, 
2852                 SESSION(session)->server, SESSION(session)->port);
2853         if (r != MAILIMAP_NO_ERROR) {
2854                 debug_print("starttls err %d\n", r);
2855                 return IMAP_ERROR;
2856         }
2857         return IMAP_SUCCESS;
2858 }
2859 #endif
2860
2861 static gint imap_cmd_select(IMAPSession *session, const gchar *folder,
2862                             gint *exists, gint *recent, gint *unseen,
2863                             guint32 *uid_validity, gboolean block)
2864 {
2865         int r;
2866
2867         r = imap_threaded_select(session->folder, folder,
2868                                  exists, recent, unseen, uid_validity);
2869         if (r != MAILIMAP_NO_ERROR) {
2870                 debug_print("select err %d\n", r);
2871                 return IMAP_ERROR;
2872         }
2873         return IMAP_SUCCESS;
2874 }
2875
2876 static gint imap_cmd_examine(IMAPSession *session, const gchar *folder,
2877                              gint *exists, gint *recent, gint *unseen,
2878                              guint32 *uid_validity, gboolean block)
2879 {
2880         int r;
2881
2882         r = imap_threaded_examine(session->folder, folder,
2883                                   exists, recent, unseen, uid_validity);
2884         if (r != MAILIMAP_NO_ERROR) {
2885                 debug_print("examine err %d\n", r);
2886                 
2887                 return IMAP_ERROR;
2888         }
2889         return IMAP_SUCCESS;
2890 }
2891
2892 static gint imap_cmd_create(IMAPSession *session, const gchar *folder)
2893 {
2894         int r;
2895
2896         r = imap_threaded_create(session->folder, folder);
2897         if (r != MAILIMAP_NO_ERROR) {
2898                 
2899                 return IMAP_ERROR;
2900         }
2901
2902         return IMAP_SUCCESS;
2903 }
2904
2905 static gint imap_cmd_rename(IMAPSession *session, const gchar *old_folder,
2906                             const gchar *new_folder)
2907 {
2908         int r;
2909
2910         r = imap_threaded_rename(session->folder, old_folder,
2911                                  new_folder);
2912         if (r != MAILIMAP_NO_ERROR) {
2913                 
2914                 return IMAP_ERROR;
2915         }
2916
2917         return IMAP_SUCCESS;
2918 }
2919
2920 static gint imap_cmd_delete(IMAPSession *session, const gchar *folder)
2921 {
2922         int r;
2923         
2924
2925         r = imap_threaded_delete(session->folder, folder);
2926         if (r != MAILIMAP_NO_ERROR) {
2927                 
2928                 return IMAP_ERROR;
2929         }
2930
2931         return IMAP_SUCCESS;
2932 }
2933
2934 typedef struct _fetch_data {
2935         IMAPSession *session;
2936         guint32 uid;
2937         const gchar *filename;
2938         gboolean headers;
2939         gboolean body;
2940         gboolean done;
2941 } fetch_data;
2942
2943 static void *imap_cmd_fetch_thread(void *data)
2944 {
2945         fetch_data *stuff = (fetch_data *)data;
2946         IMAPSession *session = stuff->session;
2947         guint32 uid = stuff->uid;
2948         const gchar *filename = stuff->filename;
2949         int r;
2950         
2951         if (stuff->body) {
2952                 r = imap_threaded_fetch_content(session->folder,
2953                                                uid, 1, filename);
2954         }
2955         else {
2956                 r = imap_threaded_fetch_content(session->folder,
2957                                                 uid, 0, filename);
2958         }
2959         if (r != MAILIMAP_NO_ERROR) {
2960                 debug_print("fetch err %d\n", r);
2961                 return GINT_TO_POINTER(IMAP_ERROR);
2962         }
2963         return GINT_TO_POINTER(IMAP_SUCCESS);
2964 }
2965
2966 static gint imap_cmd_fetch(IMAPSession *session, guint32 uid,
2967                                 const gchar *filename, gboolean headers,
2968                                 gboolean body)
2969 {
2970         fetch_data *data = g_new0(fetch_data, 1);
2971         int result = 0;
2972         data->done = FALSE;
2973         data->session = session;
2974         data->uid = uid;
2975         data->filename = filename;
2976         data->headers = headers;
2977         data->body = body;
2978
2979         if (prefs_common.work_offline && 
2980             !inc_offline_should_override(FALSE,
2981                 _("Claws Mail needs network access in order "
2982                   "to access the IMAP server."))) {
2983                 g_free(data);
2984                 return -1;
2985         }
2986         statusbar_print_all(_("Fetching message..."));
2987         result = GPOINTER_TO_INT(imap_cmd_fetch_thread(data));
2988         statusbar_pop_all();
2989         g_free(data);
2990         return result;
2991 }
2992
2993
2994 static gint imap_cmd_append(IMAPSession *session, const gchar *destfolder,
2995                             const gchar *file, IMAPFlags flags, 
2996                             guint32 *new_uid)
2997 {
2998         struct mailimap_flag_list * flag_list;
2999         int r;
3000         
3001         g_return_val_if_fail(file != NULL, IMAP_ERROR);
3002
3003         flag_list = imap_flag_to_lep(flags);
3004         r = imap_threaded_append(session->folder, destfolder,
3005                          file, flag_list, (int *)new_uid);
3006         mailimap_flag_list_free(flag_list);
3007
3008         if (r != MAILIMAP_NO_ERROR) {
3009                 debug_print("append err %d\n", r);
3010                 return IMAP_ERROR;
3011         }
3012         return IMAP_SUCCESS;
3013 }
3014
3015 static gint imap_cmd_copy(IMAPSession *session, struct mailimap_set * set,
3016                           const gchar *destfolder, GRelation *uid_mapping,
3017                           struct mailimap_set **source, struct mailimap_set **dest)
3018 {
3019         int r;
3020         
3021         g_return_val_if_fail(session != NULL, IMAP_ERROR);
3022         g_return_val_if_fail(set != NULL, IMAP_ERROR);
3023         g_return_val_if_fail(destfolder != NULL, IMAP_ERROR);
3024
3025         r = imap_threaded_copy(session->folder, set, destfolder, source, dest);
3026         if (r != MAILIMAP_NO_ERROR) {
3027                 
3028                 return IMAP_ERROR;
3029         }
3030
3031         return IMAP_SUCCESS;
3032 }
3033
3034 static gint imap_cmd_store(IMAPSession *session, struct mailimap_set * set,
3035                            IMAPFlags flags, int do_add)
3036 {
3037         int r;
3038         struct mailimap_flag_list * flag_list;
3039         struct mailimap_store_att_flags * store_att_flags;
3040         
3041         flag_list = imap_flag_to_lep(flags);
3042         
3043         if (do_add)
3044                 store_att_flags =
3045                         mailimap_store_att_flags_new_add_flags_silent(flag_list);
3046         else
3047                 store_att_flags =
3048                         mailimap_store_att_flags_new_remove_flags_silent(flag_list);
3049         
3050         r = imap_threaded_store(session->folder, set, store_att_flags);
3051         mailimap_store_att_flags_free(store_att_flags);
3052         if (r != MAILIMAP_NO_ERROR) {
3053                 
3054                 return IMAP_ERROR;
3055         }
3056         
3057         return IMAP_SUCCESS;
3058 }
3059
3060 static gint imap_cmd_expunge(IMAPSession *session)
3061 {
3062         int r;
3063         
3064         if (prefs_common.work_offline && 
3065             !inc_offline_should_override(FALSE,
3066                 _("Claws Mail needs network access in order "
3067                   "to access the IMAP server."))) {
3068                 return -1;
3069         }
3070
3071         r = imap_threaded_expunge(session->folder);
3072         if (r != MAILIMAP_NO_ERROR) {
3073                 
3074                 return IMAP_ERROR;
3075         }
3076
3077         return IMAP_SUCCESS;
3078 }
3079
3080 static void imap_path_separator_subst(gchar *str, gchar separator)
3081 {
3082         gchar *p;
3083         gboolean in_escape = FALSE;
3084
3085         if (!separator || separator == '/') return;
3086
3087         for (p = str; *p != '\0'; p++) {
3088                 if (*p == '/' && !in_escape)
3089                         *p = separator;
3090                 else if (*p == '&' && *(p + 1) != '-' && !in_escape)
3091                         in_escape = TRUE;
3092                 else if (*p == '-' && in_escape)
3093                         in_escape = FALSE;
3094         }
3095 }
3096
3097 static gchar *imap_modified_utf7_to_utf8(const gchar *mutf7_str)
3098 {
3099         static iconv_t cd = (iconv_t)-1;
3100         static gboolean iconv_ok = TRUE;
3101         GString *norm_utf7;
3102         gchar *norm_utf7_p;
3103         size_t norm_utf7_len;
3104         const gchar *p;
3105         gchar *to_str, *to_p;
3106         size_t to_len;
3107         gboolean in_escape = FALSE;
3108
3109         if (!iconv_ok) return g_strdup(mutf7_str);
3110
3111         if (cd == (iconv_t)-1) {
3112                 cd = iconv_open(CS_INTERNAL, CS_UTF_7);
3113                 if (cd == (iconv_t)-1) {
3114                         g_warning("iconv cannot convert UTF-7 to %s\n",
3115                                   CS_INTERNAL);
3116                         iconv_ok = FALSE;
3117                         return g_strdup(mutf7_str);
3118                 }
3119         }
3120
3121         /* modified UTF-7 to normal UTF-7 conversion */
3122         norm_utf7 = g_string_new(NULL);
3123
3124         for (p = mutf7_str; *p != '\0'; p++) {
3125                 /* replace: '&'  -> '+',
3126                             "&-" -> '&',
3127                             escaped ','  -> '/' */
3128                 if (!in_escape && *p == '&') {
3129                         if (*(p + 1) != '-') {
3130                                 g_string_append_c(norm_utf7, '+');
3131                                 in_escape = TRUE;
3132                         } else {
3133                                 g_string_append_c(norm_utf7, '&');
3134                                 p++;
3135                         }
3136                 } else if (in_escape && *p == ',') {
3137                         g_string_append_c(norm_utf7, '/');
3138                 } else if (in_escape && *p == '-') {
3139                         g_string_append_c(norm_utf7, '-');
3140                         in_escape = FALSE;
3141                 } else {
3142                         g_string_append_c(norm_utf7, *p);
3143                 }
3144         }
3145
3146         norm_utf7_p = norm_utf7->str;
3147         norm_utf7_len = norm_utf7->len;
3148         to_len = strlen(mutf7_str) * 5;
3149         to_p = to_str = g_malloc(to_len + 1);
3150
3151         if (iconv(cd, (ICONV_CONST gchar **)&norm_utf7_p, &norm_utf7_len,
3152                   &to_p, &to_len) == -1) {
3153                 g_warning(_("iconv cannot convert UTF-7 to %s\n"),
3154                           conv_get_locale_charset_str());
3155                 g_string_free(norm_utf7, TRUE);
3156                 g_free(to_str);
3157                 return g_strdup(mutf7_str);
3158         }
3159
3160         /* second iconv() call for flushing */
3161         iconv(cd, NULL, NULL, &to_p, &to_len);
3162         g_string_free(norm_utf7, TRUE);
3163         *to_p = '\0';
3164
3165         return to_str;
3166 }
3167
3168 static gchar *imap_utf8_to_modified_utf7(const gchar *from)
3169 {
3170         static iconv_t cd = (iconv_t)-1;
3171         static gboolean iconv_ok = TRUE;
3172         gchar *norm_utf7, *norm_utf7_p;
3173         size_t from_len, norm_utf7_len;
3174         GString *to_str;
3175         gchar *from_tmp, *to, *p;
3176         gboolean in_escape = FALSE;
3177
3178         if (!iconv_ok) return g_strdup(from);
3179
3180         if (cd == (iconv_t)-1) {
3181                 cd = iconv_open(CS_UTF_7, CS_INTERNAL);
3182                 if (cd == (iconv_t)-1) {
3183                         g_warning(_("iconv cannot convert %s to UTF-7\n"),
3184                                   CS_INTERNAL);
3185                         iconv_ok = FALSE;
3186                         return g_strdup(from);
3187                 }
3188         }
3189
3190         /* UTF-8 to normal UTF-7 conversion */
3191         Xstrdup_a(from_tmp, from, return g_strdup(from));
3192         from_len = strlen(from);
3193         norm_utf7_len = from_len * 5;
3194         Xalloca(norm_utf7, norm_utf7_len + 1, return g_strdup(from));
3195         norm_utf7_p = norm_utf7;
3196
3197 #define IS_PRINT(ch) (isprint(ch) && IS_ASCII(ch))
3198
3199         while (from_len > 0) {
3200                 if (*from_tmp == '+') {
3201                         *norm_utf7_p++ = '+';
3202                         *norm_utf7_p++ = '-';
3203                         norm_utf7_len -= 2;
3204                         from_tmp++;
3205                         from_len--;
3206                 } else if (IS_PRINT(*(guchar *)from_tmp)) {
3207                         /* printable ascii char */
3208                         *norm_utf7_p = *from_tmp;
3209                         norm_utf7_p++;
3210                         norm_utf7_len--;
3211                         from_tmp++;
3212                         from_len--;
3213                 } else {
3214                         size_t conv_len = 0;
3215
3216                         /* unprintable char: convert to UTF-7 */
3217                         p = from_tmp;
3218                         while (!IS_PRINT(*(guchar *)p) && conv_len < from_len) {
3219                                 conv_len += g_utf8_skip[*(guchar *)p];
3220                                 p += g_utf8_skip[*(guchar *)p];
3221                         }
3222
3223                         from_len -= conv_len;
3224                         if (iconv(cd, (ICONV_CONST gchar **)&from_tmp,
3225                                   &conv_len,
3226                                   &norm_utf7_p, &norm_utf7_len) == -1) {
3227                                 g_warning(_("iconv cannot convert UTF-8 to UTF-7\n"));
3228                                 return g_strdup(from);
3229                         }
3230
3231                         /* second iconv() call for flushing */
3232                         iconv(cd, NULL, NULL, &norm_utf7_p, &norm_utf7_len);
3233                 }
3234         }
3235
3236 #undef IS_PRINT
3237
3238         *norm_utf7_p = '\0';
3239         to_str = g_string_new(NULL);
3240         for (p = norm_utf7; p < norm_utf7_p; p++) {
3241                 /* replace: '&' -> "&-",
3242                             '+' -> '&',
3243                             "+-" -> '+',
3244                             BASE64 '/' -> ',' */
3245                 if (!in_escape && *p == '&') {
3246                         g_string_append(to_str, "&-");
3247                 } else if (!in_escape && *p == '+') {
3248                         if (*(p + 1) == '-') {
3249                                 g_string_append_c(to_str, '+');
3250                                 p++;
3251                         } else {
3252                                 g_string_append_c(to_str, '&');
3253                                 in_escape = TRUE;
3254                         }
3255                 } else if (in_escape && *p == '/') {
3256                         g_string_append_c(to_str, ',');
3257                 } else if (in_escape && *p == '-') {
3258                         g_string_append_c(to_str, '-');
3259                         in_escape = FALSE;
3260                 } else {
3261                         g_string_append_c(to_str, *p);
3262                 }
3263         }
3264
3265         if (in_escape) {
3266                 in_escape = FALSE;
3267                 g_string_append_c(to_str, '-');
3268         }
3269
3270         to = to_str->str;
3271         g_string_free(to_str, FALSE);
3272
3273         return to;
3274 }
3275
3276 static gboolean imap_rename_folder_func(GNode *node, gpointer data)
3277 {
3278         FolderItem *item = node->data;
3279         gchar **paths = data;
3280         const gchar *oldpath = paths[0];
3281         const gchar *newpath = paths[1];
3282         gchar *real_oldpath, *real_newpath;
3283         gchar *base;
3284         gchar *new_itempath;
3285         gint oldpathlen;
3286         IMAPSession *session = imap_session_get(item->folder);
3287
3288         oldpathlen = strlen(oldpath);
3289         if (strncmp(oldpath, item->path, oldpathlen) != 0) {
3290                 g_warning("path doesn't match: %s, %s\n", oldpath, item->path);
3291                 return TRUE;
3292         }
3293
3294         base = item->path + oldpathlen;
3295         while (*base == G_DIR_SEPARATOR) base++;
3296         if (*base == '\0')
3297                 new_itempath = g_strdup(newpath);
3298         else
3299                 new_itempath = g_strconcat(newpath, G_DIR_SEPARATOR_S, base,
3300                                            NULL);
3301
3302         real_oldpath = imap_get_real_path(session, IMAP_FOLDER(item->folder), item->path);
3303         g_free(item->path);
3304         item->path = new_itempath;
3305         
3306         real_newpath = imap_get_real_path(session, IMAP_FOLDER(item->folder), item->path);
3307         
3308         imap_threaded_subscribe(item->folder, real_oldpath, FALSE);
3309         imap_threaded_subscribe(item->folder, real_newpath, TRUE);
3310
3311         g_free(real_oldpath);
3312         g_free(real_newpath);
3313         return FALSE;
3314 }
3315
3316 typedef struct _get_list_uid_data {
3317         Folder *folder;
3318         IMAPSession *session;
3319         IMAPFolderItem *item;
3320         GSList **msgnum_list;
3321         gboolean done;
3322 } get_list_uid_data;
3323
3324 static void *get_list_of_uids_thread(void *data)
3325 {
3326         get_list_uid_data *stuff = (get_list_uid_data *)data;
3327         Folder *folder = stuff->folder;
3328         IMAPFolderItem *item = stuff->item;
3329         GSList **msgnum_list = stuff->msgnum_list;
3330         gint ok, nummsgs = 0, lastuid_old;
3331         IMAPSession *session;
3332         GSList *uidlist, *elem;
3333         clist * lep_uidlist;
3334         int r;
3335
3336         session = stuff->session;
3337         if (session == NULL) {
3338                 stuff->done = TRUE;
3339                 return GINT_TO_POINTER(-1);
3340         }
3341         /* no session locking here, it's already locked by caller */
3342         ok = imap_select(session, IMAP_FOLDER(folder), item->item.path,
3343                          NULL, NULL, NULL, NULL, TRUE);
3344         if (ok != IMAP_SUCCESS) {
3345                 stuff->done = TRUE;
3346                 return GINT_TO_POINTER(-1);
3347         }
3348
3349         uidlist = NULL;
3350         
3351         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SIMPLE, NULL,
3352                                  &lep_uidlist);
3353         
3354         if (r == MAILIMAP_NO_ERROR) {
3355                 GSList * fetchuid_list;
3356                 
3357                 fetchuid_list =
3358                         imap_uid_list_from_lep(lep_uidlist);
3359                 mailimap_search_result_free(lep_uidlist);
3360                 
3361                 uidlist = g_slist_concat(fetchuid_list, uidlist);
3362         }
3363         else {
3364                 GSList * fetchuid_list;
3365                 carray * lep_uidtab;
3366                 
3367                 r = imap_threaded_fetch_uid(folder, item->lastuid + 1,
3368                                             &lep_uidtab);
3369                 if (r == MAILIMAP_NO_ERROR) {
3370                         fetchuid_list =
3371                                 imap_uid_list_from_lep_tab(lep_uidtab);
3372                         imap_fetch_uid_list_free(lep_uidtab);
3373                         uidlist = g_slist_concat(fetchuid_list, uidlist);
3374                 }
3375         }
3376         
3377         lastuid_old = item->lastuid;
3378         *msgnum_list = g_slist_copy(item->uid_list);
3379         nummsgs = g_slist_length(*msgnum_list);
3380         debug_print("Got %d uids from cache\n", g_slist_length(item->uid_list));
3381
3382         for (elem = uidlist; elem != NULL; elem = g_slist_next(elem)) {
3383                 guint msgnum;
3384
3385                 msgnum = GPOINTER_TO_INT(elem->data);
3386                 if (msgnum > lastuid_old) {
3387                         *msgnum_list = g_slist_prepend(*msgnum_list, GINT_TO_POINTER(msgnum));
3388                         item->uid_list = g_slist_prepend(item->uid_list, GINT_TO_POINTER(msgnum));
3389                         nummsgs++;
3390
3391                         if(msgnum > item->lastuid)
3392                                 item->lastuid = msgnum;
3393                 }
3394         }
3395         g_slist_free(uidlist);
3396         stuff->done = TRUE;
3397         return GINT_TO_POINTER(nummsgs);
3398 }
3399
3400 static gint get_list_of_uids(IMAPSession *session, Folder *folder, IMAPFolderItem *item, GSList **msgnum_list)
3401 {
3402         gint result;
3403         get_list_uid_data *data = g_new0(get_list_uid_data, 1);
3404         data->done = FALSE;
3405         data->folder = folder;
3406         data->item = item;
3407         data->msgnum_list = msgnum_list;
3408         data->session = session;
3409         if (prefs_common.work_offline && 
3410             !inc_offline_should_override(FALSE,
3411                 _("Claws Mail needs network access in order "
3412                   "to access the IMAP server."))) {
3413    &