aboutsummaryrefslogtreecommitdiffstats
path: root/camel/providers/nntp/camel-nntp-store.c
blob: 7ac3fcdc82a67c56c0812c8936036c132e5ed6cb (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* camel-nntp-store.c : class for an nntp store */

/* 
 *
 * Copyright (C) 2000 Ximian, Inc. <toshok@ximian.com>
 *
 * This program is free software; you can redistribute it and/or 
 * modify it under the terms of version 2 of the GNU General Public 
 * License as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA
 */

#include <config.h>

#include <dirent.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "libgnome/libgnome.h"

#include "camel-nntp-resp-codes.h"
#include "camel-folder-summary.h"
#include "camel-nntp-store.h"
#include "camel-nntp-grouplist.h"
#include "camel-nntp-folder.h"
#include "camel-nntp-auth.h"
#include "camel-exception.h"
#include "camel-url.h"
#include "string-utils.h"

#define NNTP_PORT 119

#define DUMP_EXTENSIONS

/* define if you want the subscribe ui to show folders in tree form */
/* #define INFO_AS_TREE */

static CamelRemoteStoreClass *remote_store_class = NULL;

static CamelServiceClass *service_class = NULL;

/* Returns the class for a CamelNNTPStore */
#define CNNTPS_CLASS(so) CAMEL_NNTP_STORE_CLASS (CAMEL_OBJECT_GET_CLASS(so))
#define CF_CLASS(so) CAMEL_FOLDER_CLASS (CAMEL_OBJECT_GET_CLASS(so))
#define CNNTPF_CLASS(so) CAMEL_NNTP_FOLDER_CLASS (CAMEL_OBJECT_GET_CLASS(so))

static gboolean ensure_news_dir_exists (CamelNNTPStore *store);

static int
camel_nntp_store_set_mode (CamelNNTPStore *store, CamelException *ex)
{
    int rc;

    CAMEL_NNTP_STORE_LOCK(store);
    rc = camel_nntp_command(store, ex, NULL, "MODE READER");
    CAMEL_NNTP_STORE_UNLOCK(store);

    return rc;
}

static void
camel_nntp_store_get_extensions (CamelNNTPStore *store, CamelException *ex)
{
    int rc;

    store->extensions = 0;

    CAMEL_NNTP_STORE_LOCK(store);
    rc = camel_nntp_command(store, ex, NULL, "LIST EXTENSIONS");
    if (rc == NNTP_LIST_FOLLOWS || rc == NNTP_EXTENSIONS_SUPPORTED) {
        gboolean done = FALSE;
        CamelException ex;

        camel_exception_init (&ex);

        while (!done) {
            char *line;

            if (camel_remote_store_recv_line (CAMEL_REMOTE_STORE (store), &line, &ex) < 0)
                break; /* XXX */

            if (*line == '.') {
                done = TRUE;
            }
            else {
#define CHECK_EXT(name,val) if (!strcasecmp (line, (name))) store->extensions |= (val)

                CHECK_EXT ("SEARCH",     CAMEL_NNTP_EXT_SEARCH);
                CHECK_EXT ("SETGET",     CAMEL_NNTP_EXT_SETGET);
                CHECK_EXT ("OVER",       CAMEL_NNTP_EXT_OVER);
                CHECK_EXT ("XPATTEXT",   CAMEL_NNTP_EXT_XPATTEXT);
                CHECK_EXT ("XACTIVE",    CAMEL_NNTP_EXT_XACTIVE);
                CHECK_EXT ("LISTMOTD",   CAMEL_NNTP_EXT_LISTMOTD);
                CHECK_EXT ("LISTSUBSCR", CAMEL_NNTP_EXT_LISTSUBSCR);
                CHECK_EXT ("LISTPNAMES", CAMEL_NNTP_EXT_LISTPNAMES);

#undef CHECK_EXT
            }

            g_free (line);
        }
    }
    CAMEL_NNTP_STORE_UNLOCK(store);

#ifdef DUMP_EXTENSIONS
    g_print ("NNTP Extensions:");
#define DUMP_EXT(name,val) if (store->extensions & (val)) g_print (" %s", name);
    DUMP_EXT ("SEARCH",     CAMEL_NNTP_EXT_SEARCH);
    DUMP_EXT ("SETGET",     CAMEL_NNTP_EXT_SETGET);
    DUMP_EXT ("OVER",       CAMEL_NNTP_EXT_OVER);
    DUMP_EXT ("XPATTEXT",   CAMEL_NNTP_EXT_XPATTEXT);
    DUMP_EXT ("XACTIVE",    CAMEL_NNTP_EXT_XACTIVE);
    DUMP_EXT ("LISTMOTD",   CAMEL_NNTP_EXT_LISTMOTD);
    DUMP_EXT ("LISTSUBSCR", CAMEL_NNTP_EXT_LISTSUBSCR);
    DUMP_EXT ("LISTPNAMES", CAMEL_NNTP_EXT_LISTPNAMES);
    g_print ("\n");
#undef DUMP_EXT
#endif
}

static void
camel_nntp_store_get_overview_fmt (CamelNNTPStore *store, CamelException *ex)
{
    int status;
    int i;
    gboolean done = FALSE;
    
    CAMEL_NNTP_STORE_LOCK(store);
    status = camel_nntp_command (store, ex, NULL,
                     "LIST OVERVIEW.FMT");

    if (status != NNTP_LIST_FOLLOWS) {
        if (store->extensions & CAMEL_NNTP_EXT_OVER) {
            /* if we can't get the overview format, we should
               disable OVER support */
            g_warning ("server reported support of OVER but LIST OVERVIEW.FMT failed."
                   "  disabling OVER.\n");
            store->extensions &= ~CAMEL_NNTP_EXT_OVER;
        }
        CAMEL_NNTP_STORE_UNLOCK(store);
        return;
    }
    else {
        if (!(store->extensions & CAMEL_NNTP_EXT_OVER)) {
            g_warning ("server didn't report support of OVER but LIST OVERVIEW.FMT worked."
                   "  enabling OVER.\n");
            store->extensions |= CAMEL_NNTP_EXT_OVER;
        }
    }

    /* start at 1 because the article number is always first */
    store->num_overview_fields = 1;
    
    for (i = 0; i < CAMEL_NNTP_OVER_LAST; i ++) {
        store->overview_field [i].index = -1;
    }

    while (!done) {
        char *line;

        if (camel_remote_store_recv_line (CAMEL_REMOTE_STORE (store), &line, ex) < 0)
            break; /* XXX */

        if (*line == '.') {
            done = TRUE;
        }
        else {
            CamelNNTPOverField *over_field = NULL;
            char *colon = NULL;;

            if (!strncasecmp (line, "From:", 5)) {
                over_field = &store->overview_field [ CAMEL_NNTP_OVER_FROM ];
                over_field->index = store->num_overview_fields;
                colon = line + 5;
            }
            else if (!strncasecmp (line, "Subject:", 7)) {
                over_field = &store->overview_field [ CAMEL_NNTP_OVER_SUBJECT ];
                over_field->index = store->num_overview_fields;
                colon = line + 7;
            }
            else if (!strncasecmp (line, "Date:", 5)) {
                over_field = &store->overview_field [ CAMEL_NNTP_OVER_DATE ];
                over_field->index = store->num_overview_fields;
                colon = line + 5;
            }
            else if (!strncasecmp (line, "Message-ID:", 11)) {
                over_field = &store->overview_field [ CAMEL_NNTP_OVER_MESSAGE_ID ];
                over_field->index = store->num_overview_fields;
                colon = line + 11;
            }
            else if (!strncasecmp (line, "References:", 11)) {
                over_field = &store->overview_field [ CAMEL_NNTP_OVER_REFERENCES ];
                over_field->index = store->num_overview_fields;
                colon = line + 11;
            }
            else if (!strncasecmp (line, "Bytes:", 6)) {
                over_field = &store->overview_field [ CAMEL_NNTP_OVER_BYTES ];
                over_field->index = store->num_overview_fields;
                colon = line + 11;
            }
        
            if (colon && !strncmp (colon + 1, "full", 4))
                over_field->full = TRUE;

            store->num_overview_fields ++;
        }

        g_free (line);
    }

    for (i = 0; i < CAMEL_NNTP_OVER_LAST; i ++) {
        if (store->overview_field [i].index == -1) {
            g_warning ("server's OVERVIEW.FMT doesn't support minimum set we require,"
                   " disabling OVER support.\n");
            store->extensions &= ~CAMEL_NNTP_EXT_OVER;
        }
    }
    CAMEL_NNTP_STORE_UNLOCK(store);
}

static gboolean
nntp_store_connect (CamelService *service, CamelException *ex)
{
    char *buf;
    int resp_code;
    CamelNNTPStore *store = CAMEL_NNTP_STORE (service);

    if (!ensure_news_dir_exists(store)) {
        camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
                      _("Could not open directory for news server: %s"),
                      strerror (errno));
        return FALSE;
    }

    if (CAMEL_SERVICE_CLASS (remote_store_class)->connect (service, ex) == FALSE)
        return FALSE;

    /* Read the greeting */
    if (camel_remote_store_recv_line (CAMEL_REMOTE_STORE (service), &buf, ex) < 0) {
        return FALSE;
    }

    resp_code = atoi (buf);
    /* Check to see if we have any permissions on this server. */
    if (resp_code == NNTP_NO_PERMISSION)
        return FALSE;

    /* check if posting is allowed. */
    if (resp_code == NNTP_GREETING_POSTING_OK) {
        g_print ("posting allowed\n");
        store->posting_allowed = TRUE;
    }
    else if (resp_code == NNTP_GREETING_NO_POSTING) {
        g_print ("no posting allowed\n");
        store->posting_allowed = FALSE;
    }
    else {
        g_warning ("unexpected server greeting code %d, no posting allowed\n", resp_code);
        store->posting_allowed = FALSE;
    }

    g_free (buf);

    /* set 'reader' mode */
    camel_nntp_store_set_mode(store, ex);

    /* get a list of extensions that the server supports */
    camel_nntp_store_get_extensions (store, ex);

    /* try to get the overview.fmt */
    camel_nntp_store_get_overview_fmt (store, ex);

    return TRUE;
}

static gboolean
nntp_store_disconnect (CamelService *service, gboolean clean, CamelException *ex)
{
    CamelNNTPStore *store = CAMEL_NNTP_STORE (service);

    if (clean)
        camel_nntp_command (store, ex, NULL, "QUIT");

    if (store->newsrc)
        camel_nntp_newsrc_write (store->newsrc);

    if (!service_class->disconnect (service, clean, ex))
        return FALSE;

    return TRUE;
}

static char *
nntp_store_get_name (CamelService *service, gboolean brief)
{
    if (brief)
        return g_strdup_printf ("%s", service->url->host);
    else
        return g_strdup_printf (_("USENET News via %s"), service->url->host);
    
}

static CamelServiceAuthType password_authtype = {
    N_("Password"),
    
    N_("This option will authenticate with the NNTP server using a "
       "plaintext password."),
    
    "",
    TRUE
};

static GList *
nntp_store_query_auth_types (CamelService *service, CamelException *ex)
{
    GList *prev;
    
    g_warning ("nntp::query_auth_types: not implemented. Defaulting.");
    prev = CAMEL_SERVICE_CLASS (remote_store_class)->query_auth_types (service, ex);
    return g_list_prepend (prev, &password_authtype);
}

static CamelFolder *
nntp_store_get_folder (CamelStore *store, const gchar *folder_name,
               guint32 flags, CamelException *ex)
{
    CamelNNTPStore *nntp_store = CAMEL_NNTP_STORE (store);

    /* if we haven't already read our .newsrc, read it now */
    if (!nntp_store->newsrc)
        nntp_store->newsrc = 
        camel_nntp_newsrc_read_for_server (CAMEL_SERVICE(store)->url->host);

    if (!nntp_store->newsrc) {
        camel_exception_setv (ex, CAMEL_EXCEPTION_SERVICE_UNAVAILABLE,
                      _("Unable to open or create .newsrc file for %s: %s"),
                      CAMEL_SERVICE(store)->url->host,
                      strerror(errno));
        return NULL;
    }

    return camel_nntp_folder_new (store, folder_name, ex);
}

#ifdef INFO_AS_TREE
static void
build_folder_info (CamelNNTPStore *nntp_store, CamelFolderInfo **root,
           CamelFolderInfo *parent, CamelNNTPGroupListEntry *entry,
           char *prefix, char *suffix,
           GHashTable *name_to_info)
{
    CamelURL *url = CAMEL_SERVICE (nntp_store)->url;
    char *dot;
    if ((dot = strchr (suffix, '.'))) {
        /* it's an internal node, figure out the next node in
                   the chain */
        CamelFolderInfo *node;
        char *node_name, *node_full_name;

        node_name = g_malloc0 (dot - suffix + 1);
        strncpy (node_name, suffix, dot - suffix);
        node_full_name = g_strdup_printf ("%s.%s", prefix, node_name);

        node = g_hash_table_lookup (name_to_info, node_full_name);
        if (!node) {
            /* we need to add one */
            node = g_new0 (CamelFolderInfo, 1);
            node->name = g_strdup (node_name);
            node->full_name = g_strdup (node_full_name);
            node->url = NULL;
            node->unread_message_count = -1;

            if (parent) {
                if (parent->child) {
                    node->sibling = parent->child;
                    parent->child = node;
                }
                else {
                    parent->child = node;
                }
            }
            else {
                if (*root) {
                    *root = node;
                }
                else {
                    node->sibling = *root;
                    *root = node;
                }
            }

            g_hash_table_insert (name_to_info, node_full_name, node);
        }

        build_folder_info (nntp_store, root, node, entry, node_full_name, dot + 1, name_to_info);
    }
    else {
        /* it's a leaf node, make the CamelFolderInfo and
                   append it to @parent's list of children. */
        CamelFolderInfo *new_group;

        new_group = g_new0 (CamelFolderInfo, 1);
        new_group->name = g_strdup (entry->group_name);
        new_group->full_name = g_strdup (entry->group_name);
        new_group->url = g_strdup_printf ("nntp://%s%s%s/%s",
                          url->user ? url->user : "",
                          url->user ? "@" : "",
                          url->host, (char *)entry->group_name);

        new_group->unread_message_count = (entry->high - entry->low - 
                           camel_nntp_newsrc_get_num_articles_read (nntp_store->newsrc, entry->group_name));

        if (parent) {
            if (parent->child) {
                new_group->sibling = parent->child;
                parent->child = new_group;
            }
            else {
                parent->child = new_group;
            }
        }
        else {
            if (*root) {
                *root = new_group;
            }
            else {
                new_group->sibling = *root;
                *root = new_group;
            }
        }
    }
}
#endif

static CamelFolderInfo *
build_folder_info_from_grouplist (CamelNNTPStore *nntp_store, const char *top)
{
    GList *g;
    CamelFolderInfo *groups = NULL;
#ifdef INFO_AS_TREE
    GHashTable *hash = g_hash_table_new (g_str_hash, g_str_equal);
#else
    CamelFolderInfo *last = NULL, *fi;
    CamelURL *url = CAMEL_SERVICE (nntp_store)->url;
#endif

    for (g = nntp_store->group_list->group_list; g; g = g_list_next (g)) {
        CamelNNTPGroupListEntry *entry = g->data;

        if (!top || !strncmp (top, entry->group_name, strlen (top))) {
#ifdef INFO_AS_TREE
            build_folder_info (nntp_store, &groups, NULL, entry,
                       "", entry->group_name, hash);
#else

            fi = g_new0 (CamelFolderInfo, 1);
            fi->name = g_strdup (entry->group_name);
            fi->full_name = g_strdup (entry->group_name);
            fi->url = g_strdup_printf ("nntp://%s%s%s/%s",
                           url->user ? url->user : "",
                           url->user ? "@" : "",
                           url->host, (char *)entry->group_name);

            fi->unread_message_count = (entry->high - entry->low - 
                            camel_nntp_newsrc_get_num_articles_read (
                                 nntp_store->newsrc, entry->group_name));
            camel_folder_info_build_path(fi, '/');

            if (last)
                last->sibling = fi;
            else
                groups = fi;
            last = fi;
#endif
        }
    }

    return groups;
}

static CamelFolderInfo *
nntp_store_get_folder_info (CamelStore *store, const char *top,
                guint32 flags,
                CamelException *ex)
{
    CamelURL *url = CAMEL_SERVICE (store)->url;
    CamelNNTPStore *nntp_store = (CamelNNTPStore *)store;
    GPtrArray *names;
    CamelFolderInfo *groups = NULL, *last = NULL, *fi;
    int i;

    /* if we haven't already read our .newsrc, read it now */
    if (!nntp_store->newsrc)
        nntp_store->newsrc = 
        camel_nntp_newsrc_read_for_server (CAMEL_SERVICE(store)->url->host);

    if (!nntp_store->newsrc) {
        camel_exception_setv (ex, CAMEL_EXCEPTION_SERVICE_UNAVAILABLE,
                      _("Unable to open or create .newsrc file for %s: %s"),
                      CAMEL_SERVICE(store)->url->host,
                      strerror(errno));
        return NULL;
    }

    if (!(flags & CAMEL_STORE_FOLDER_INFO_SUBSCRIBED)) {
        if (!nntp_store->group_list)
            nntp_store->group_list = camel_nntp_grouplist_fetch (nntp_store, ex);
        if (camel_exception_is_set (ex)) {
            return NULL;
        }
        else {
            fi = build_folder_info_from_grouplist (nntp_store, top);
            return fi;
        }
    }

    if (top == NULL) {
        /* return the list of groups */
        names = camel_nntp_newsrc_get_subscribed_group_names (nntp_store->newsrc);
        for (i = 0; i < names->len; i++) {
            fi = g_new0 (CamelFolderInfo, 1);
            fi->name = g_strdup (names->pdata[i]);
            fi->full_name = g_strdup (names->pdata[i]);
            fi->url = g_strdup_printf ("nntp://%s%s%s/%s",
                           url->user ? url->user : "",
                           url->user ? "@" : "",
                           url->host, (char *)names->pdata[i]);
            /* FIXME */
            fi->unread_message_count = -1;
            camel_folder_info_build_path(fi, '/');

            if (last)
                last->sibling = fi;
            else
                groups = fi;
            last = fi;
        }
        camel_nntp_newsrc_free_group_names (nntp_store->newsrc, names);

        return groups;
    }
    else {
        /* getting a specific group */

        fi = g_new0 (CamelFolderInfo, 1);
        fi->name = g_strdup (top);
        fi->full_name = g_strdup (top);
        fi->url = g_strdup_printf ("nntp://%s/%s", url->host, top);
        /* FIXME */
        fi->unread_message_count = -1;
        camel_folder_info_build_path(fi, '/');

        return fi;
    }
}

static gboolean
nntp_store_folder_subscribed (CamelStore *store, const char *folder_name)
{
    CamelNNTPStore *nntp_store = CAMEL_NNTP_STORE (store);

    return camel_nntp_newsrc_group_is_subscribed (nntp_store->newsrc, folder_name);
}

static void
nntp_store_subscribe_folder (CamelStore *store, const char *folder_name,
                 CamelException *ex)
{
    CamelNNTPStore *nntp_store = CAMEL_NNTP_STORE (store);

    camel_nntp_newsrc_subscribe_group (nntp_store->newsrc, folder_name);
}

static void
nntp_store_unsubscribe_folder (CamelStore *store, const char *folder_name,
                   CamelException *ex)
{
    CamelNNTPStore *nntp_store = CAMEL_NNTP_STORE (store);

    camel_nntp_newsrc_unsubscribe_group (nntp_store->newsrc, folder_name);
}

static void
finalize (CamelObject *object)
{
    CamelNNTPStore *nntp_store = CAMEL_NNTP_STORE (object);
    if (nntp_store->newsrc)
        camel_nntp_newsrc_write (nntp_store->newsrc);
#ifdef ENABLE_THREADS
    e_mutex_destroy(nntp_store->command_lock);
#endif
}

static void
camel_nntp_store_class_init (CamelNNTPStoreClass *camel_nntp_store_class)
{
    CamelStoreClass *camel_store_class = CAMEL_STORE_CLASS (camel_nntp_store_class);
    CamelServiceClass *camel_service_class = CAMEL_SERVICE_CLASS (camel_nntp_store_class);

    remote_store_class = CAMEL_REMOTE_STORE_CLASS(camel_type_get_global_classfuncs 
                              (camel_remote_store_get_type ()));

    service_class = CAMEL_SERVICE_CLASS (camel_type_get_global_classfuncs (camel_service_get_type ()));
    
    /* virtual method overload */
    camel_service_class->connect = nntp_store_connect;
    camel_service_class->disconnect = nntp_store_disconnect;
    camel_service_class->query_auth_types = nntp_store_query_auth_types;
    camel_service_class->get_name = nntp_store_get_name;

    camel_store_class->get_folder = nntp_store_get_folder;
    camel_store_class->get_folder_info = nntp_store_get_folder_info;
    camel_store_class->free_folder_info = camel_store_free_folder_info_full;

    camel_store_class->folder_subscribed = nntp_store_folder_subscribed;
    camel_store_class->subscribe_folder = nntp_store_subscribe_folder;
    camel_store_class->unsubscribe_folder = nntp_store_unsubscribe_folder;
}



static void
camel_nntp_store_init (gpointer object, gpointer klass)
{
    CamelRemoteStore *remote_store = CAMEL_REMOTE_STORE (object);
    CamelNNTPStore *nntp_store = CAMEL_NNTP_STORE(object);
    CamelStore *store = CAMEL_STORE (object);

    remote_store->default_port = NNTP_PORT;

    store->flags = CAMEL_STORE_SUBSCRIPTIONS;

#ifdef ENABLE_THREADS
    nntp_store->command_lock = e_mutex_new(E_MUTEX_REC);
#endif
}

CamelType
camel_nntp_store_get_type (void)
{
    static CamelType camel_nntp_store_type = CAMEL_INVALID_TYPE;
    
    if (camel_nntp_store_type == CAMEL_INVALID_TYPE)    {
        camel_nntp_store_type = camel_type_register (CAMEL_REMOTE_STORE_TYPE, "CamelNNTPStore",
                                 sizeof (CamelNNTPStore),
                                 sizeof (CamelNNTPStoreClass),
                                 (CamelObjectClassInitFunc) camel_nntp_store_class_init,
                                 NULL,
                                 (CamelObjectInitFunc) camel_nntp_store_init,
                                 (CamelObjectFinalizeFunc) finalize);
    }
    
    return camel_nntp_store_type;
}


/**
 * camel_nntp_command: Send a command to a NNTP server.
 * @store: the NNTP store
 * @ret: a pointer to return the full server response in
 * @fmt: a printf-style format string, followed by arguments
 *
 * This command sends the command specified by @fmt and the following
 * arguments to the connected NNTP store specified by @store. It then
 * reads the server's response and parses out the status code. If
 * the caller passed a non-NULL pointer for @ret, camel_nntp_command
 * will set it to point to an buffer containing the rest of the
 * response from the NNTP server. (If @ret was passed but there was
 * no extended response, @ret will be set to NULL.) The caller must
 * free this buffer when it is done with it.
 *
 * Return value: the response code of the nntp command.
 **/
static int
camel_nntp_command_send_recv (CamelNNTPStore *store, CamelException *ex, char **ret, char *cmd)
{
    char *respbuf;
    int resp_code;
    gboolean again;

    do {
        again = FALSE;

        /* Send the command */
        if (camel_remote_store_send_string (CAMEL_REMOTE_STORE (store), ex, cmd) < 0) {
            return NNTP_PROTOCOL_ERROR;
        }

        /* Read the response */
        if (camel_remote_store_recv_line (CAMEL_REMOTE_STORE (store), &respbuf, ex) < 0) {
            if (ret)
                *ret = g_strdup (g_strerror (errno));
            return NNTP_PROTOCOL_ERROR;
        }

        resp_code = atoi (respbuf);

        /* this is kind of a gross hack, but since an auth challenge
           can pop up at any time, and we want to shield this from our
           callers, we handle authentication here. */
        if (resp_code == NNTP_AUTH_REQUIRED) {
            resp_code = camel_nntp_auth_authenticate (store, ex);
            if (resp_code != NNTP_AUTH_ACCEPTED) {
                return resp_code;
            }

            /* need to resend our command here */
            again = TRUE;
        }
    } while (again);

    if (ret) {
        *ret = strchr (respbuf, ' ');
        if (*ret)
            *ret = g_strdup (*ret + 1);
    }
    g_free (respbuf);

    return resp_code;
}

int
camel_nntp_command (CamelNNTPStore *store, CamelException *ex, char **ret, char *fmt, ...)
{
    char *cmdbuf;
    va_list ap;
    int resp_code;
    char *real_fmt;

    real_fmt = g_strdup_printf ("%s\r\n", fmt);

    va_start (ap, fmt);
    cmdbuf = g_strdup_vprintf (real_fmt, ap);
    va_end (ap);

    g_free (real_fmt);

    resp_code = camel_nntp_command_send_recv (store, ex, ret, cmdbuf);

    if(camel_exception_get_id(ex) == 
       CAMEL_EXCEPTION_SERVICE_NOT_CONNECTED) {
        /* the connect might have timed out, give it another shot.. */
        camel_exception_clear(ex);
        if(nntp_store_connect(CAMEL_SERVICE(store), ex))
            resp_code = 
                camel_nntp_command_send_recv (store, ex, ret, cmdbuf);
        /* that's it, no more tries */
    }

    g_free (cmdbuf);

    return resp_code;
}

void
camel_nntp_store_subscribe_group (CamelStore *store,
                  const gchar *group_name)
{
    gchar *root_dir = camel_nntp_store_get_toplevel_dir(CAMEL_NNTP_STORE(store));
    char *ret = NULL;
    CamelException *ex = camel_exception_new();

    if (camel_exception_get_id (ex)) {
        g_free (root_dir);
        camel_exception_free (ex);
        return;
    }

    if (camel_nntp_command ( CAMEL_NNTP_STORE (store),
                 ex, &ret, "GROUP %s", group_name) == NNTP_GROUP_SELECTED) {
        /* we create an empty summary file here, so that when
                   the group is opened we'll know we need to build it. */
        gchar *summary_file;
        int fd;
        summary_file = g_strdup_printf ("%s/%s-ev-summary", root_dir, group_name);
        
        fd = open (summary_file, O_CREAT | O_RDWR, 0666);
        close (fd);

        g_free (summary_file);
    }
    if (ret) g_free (ret);

    g_free (root_dir);
    camel_exception_free (ex);
}

void
camel_nntp_store_unsubscribe_group (CamelStore *store,
                    const gchar *group_name)
{
    gchar *root_dir = camel_nntp_store_get_toplevel_dir(CAMEL_NNTP_STORE(store));
    gchar *summary_file;

    summary_file = g_strdup_printf ("%s/%s-ev-summary", root_dir, group_name);
    if (g_file_exists (summary_file))
        unlink (summary_file);
    g_free (summary_file);

    g_free (root_dir);
}

GList *
camel_nntp_store_list_subscribed_groups(CamelStore *store)
{
    GList *group_name_list = NULL;
    struct stat stat_buf;
    gint stat_error = 0;
    gchar *entry_name;
    gchar *full_entry_name;
    gchar *real_group_name;
    struct dirent *dir_entry;
    DIR *dir_handle;
    gchar *root_dir = camel_nntp_store_get_toplevel_dir(CAMEL_NNTP_STORE(store));

    dir_handle = opendir (root_dir);
    g_return_val_if_fail (dir_handle, NULL);

    /* read the first entry in the directory */
    dir_entry = readdir (dir_handle);
    while ((stat_error != -1) && (dir_entry != NULL)) {

        /* get the name of the next entry in the dir */
        entry_name = dir_entry->d_name;
        full_entry_name = g_strdup_printf ("%s/%s", root_dir, entry_name);
        stat_error = stat (full_entry_name, &stat_buf);
        g_free (full_entry_name);

        /* is it a normal file ending in -ev-summary ? */
        if ((stat_error != -1) && S_ISREG (stat_buf.st_mode)) {
            gboolean summary_suffix_found;

            real_group_name = string_prefix (entry_name, "-ev-summary",
                             &summary_suffix_found);

            if (summary_suffix_found)
                /* add the folder name to the list */
                group_name_list = g_list_append (group_name_list, 
                                 real_group_name);
        }
        /* read next entry */
        dir_entry = readdir (dir_handle);
    }

    closedir (dir_handle);

    return group_name_list;
}

gchar *
camel_nntp_store_get_toplevel_dir (CamelNNTPStore *store)
{
    CamelURL *url = CAMEL_SERVICE (store)->url;
    char *top_dir;

    g_assert(url != NULL);

    top_dir = g_strdup_printf( "%s/evolution/news/%s",
                   g_get_home_dir (),
                   url->host );

    return top_dir;
}

static gboolean
ensure_news_dir_exists (CamelNNTPStore *store)
{
    gchar *dir = camel_nntp_store_get_toplevel_dir (store);

    if (access (dir, F_OK) == 0) {
        g_free (dir);
        return TRUE;
    }

    if (camel_mkdir_hier (dir, S_IRWXU) == -1) {
        g_free (dir);
        return FALSE;
    }

    return TRUE;
}