aboutsummaryrefslogtreecommitdiffstats
path: root/camel/providers/local/camel-mh-summary.c
blob: 06c5715d0d54adbec014d4d43357aec0fb5efceb (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
/*
 *  Copyright (C) 2000 Ximian Inc.
 *
 *  Authors: Not Zed <notzed@lostzed.mmc.com.au>
 *
 * 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.
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <sys/stat.h>
#include <sys/uio.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>

#include <sys/types.h>
#include <dirent.h>

#include <ctype.h>

#include "camel-mh-summary.h"
#include <camel/camel-mime-message.h>

#define d(x) /*(printf("%s(%d): ", __FILE__, __LINE__),(x))*/

#define CAMEL_MH_SUMMARY_VERSION (0x2000)

static int mh_summary_check(CamelLocalSummary *cls, CamelFolderChangeInfo *changeinfo, CamelException *ex);
static int mh_summary_sync(CamelLocalSummary *cls, gboolean expunge, CamelFolderChangeInfo *changeinfo, CamelException *ex);
/*static int mh_summary_add(CamelLocalSummary *cls, CamelMimeMessage *msg, CamelMessageInfo *info, CamelFolderChangeInfo *, CamelException *ex);*/

static char *mh_summary_next_uid_string(CamelFolderSummary *s);

static void camel_mh_summary_class_init (CamelMhSummaryClass *class);
static void camel_mh_summary_init   (CamelMhSummary *gspaper);
static void camel_mh_summary_finalise   (CamelObject *obj);

#define _PRIVATE(x) (((CamelMhSummary *)(x))->priv)

struct _CamelMhSummaryPrivate {
    char *current_uid;
};

static CamelLocalSummaryClass *parent_class;

CamelType
camel_mh_summary_get_type (void)
{
    static CamelType type = CAMEL_INVALID_TYPE;
    
    if (type == CAMEL_INVALID_TYPE) {
        type = camel_type_register(camel_local_summary_get_type (), "CamelMhSummary",
                       sizeof(CamelMhSummary),
                       sizeof(CamelMhSummaryClass),
                       (CamelObjectClassInitFunc)camel_mh_summary_class_init,
                       NULL,
                       (CamelObjectInitFunc)camel_mh_summary_init,
                       (CamelObjectFinalizeFunc)camel_mh_summary_finalise);
    }
    
    return type;
}

static void
camel_mh_summary_class_init (CamelMhSummaryClass *class)
{
    CamelFolderSummaryClass *sklass = (CamelFolderSummaryClass *) class;
    CamelLocalSummaryClass *lklass = (CamelLocalSummaryClass *)class;

    parent_class = (CamelLocalSummaryClass *)camel_type_get_global_classfuncs(camel_local_summary_get_type ());

    /* override methods */
    sklass->next_uid_string = mh_summary_next_uid_string;

    lklass->check = mh_summary_check;
    lklass->sync = mh_summary_sync;
    /*lklass->add = mh_summary_add;*/
}

static void
camel_mh_summary_init (CamelMhSummary *o)
{
    struct _CamelFolderSummary *s = (CamelFolderSummary *) o;

    o->priv = g_malloc0(sizeof(*o->priv));
    /* set unique file version */
    s->version += CAMEL_MH_SUMMARY_VERSION;
}

static void
camel_mh_summary_finalise(CamelObject *obj)
{
    CamelMhSummary *o = (CamelMhSummary *)obj;

    g_free(o->priv);
}

/**
 * camel_mh_summary_new:
 *
 * Create a new CamelMhSummary object.
 * 
 * Return value: A new #CamelMhSummary object.
 **/
CamelMhSummary  *camel_mh_summary_new   (const char *filename, const char *mhdir, ibex *index)
{
    CamelMhSummary *o = (CamelMhSummary *)camel_object_new(camel_mh_summary_get_type ());

    camel_local_summary_construct((CamelLocalSummary *)o, filename, mhdir, index);
    return o;
}

static char *mh_summary_next_uid_string(CamelFolderSummary *s)
{
    CamelMhSummary *mhs = (CamelMhSummary *)s;
    CamelLocalSummary *cls = (CamelLocalSummary *)s;
    int fd = -1;
    guint32 uid;
    char *name;

    /* if we are working to add an existing file, then use current_uid */
    if (mhs->priv->current_uid)
        return g_strdup(mhs->priv->current_uid);

    /* else scan for one - and create it too, to make sure */
    do {
        close(fd);
        uid = camel_folder_summary_next_uid(s);
        name = g_strdup_printf("%s/%u", cls->folder_path, uid);
        /* O_EXCL isn't guaranteed, sigh.  Oh well, bad luck, mh has problems anyway */
        fd = open(name, O_WRONLY|O_CREAT|O_EXCL, 0600);
        g_free(name);
    } while (fd == -1 && errno == EEXIST);

    close(fd);

    return g_strdup_printf("%u", uid);
}

static int camel_mh_summary_add(CamelLocalSummary *cls, const char *name, int forceindex)
{
    CamelMhSummary *mhs = (CamelMhSummary *)cls;
    char *filename = g_strdup_printf("%s/%s", cls->folder_path, name);
    int fd;
    CamelMimeParser *mp;

    d(printf("summarising: %s\n", name));

    fd = open(filename, O_RDONLY);
    if (fd == -1) {
        g_warning("Cannot summarise/index: %s: %s", filename, strerror(errno));
        g_free(filename);
        return -1;
    }
    mp = camel_mime_parser_new();
    camel_mime_parser_scan_from(mp, FALSE);
    camel_mime_parser_init_with_fd(mp, fd);
    if (cls->index && (forceindex || !ibex_contains_name(cls->index, (char *)name))) {
        d(printf("forcing indexing of message content\n"));
        camel_folder_summary_set_index((CamelFolderSummary *)mhs, cls->index);
    } else {
        camel_folder_summary_set_index((CamelFolderSummary *)mhs, NULL);
    }
    mhs->priv->current_uid = (char *)name;
    camel_folder_summary_add_from_parser((CamelFolderSummary *)mhs, mp);
    camel_object_unref((CamelObject *)mp);
    mhs->priv->current_uid = NULL;
    camel_folder_summary_set_index((CamelFolderSummary *)mhs, NULL);
    g_free(filename);
    return 0;
}

static void
remove_summary(char *key, CamelMessageInfo *info, CamelLocalSummary *cls)
{
    d(printf("removing message %s from summary\n", key));
    if (cls->index)
        ibex_unindex(cls->index, (char *)camel_message_info_uid(info));
    camel_folder_summary_remove((CamelFolderSummary *)cls, info);
    camel_folder_summary_info_free((CamelFolderSummary *)cls, info);
}

static int
mh_summary_check(CamelLocalSummary *cls, CamelFolderChangeInfo *changeinfo, CamelException *ex)
{
    DIR *dir;
    struct dirent *d;
    char *p, c;
    CamelMessageInfo *info;
    GHashTable *left;
    int i, count;
    int forceindex;

    /* FIXME: Handle changeinfo */

    d(printf("checking summary ...\n"));

    /* scan the directory, check for mail files not in the index, or index entries that
       no longer exist */
    dir = opendir(cls->folder_path);
    if (dir == NULL) {
        camel_exception_setv(ex, 1, _("Cannot open MH directory path: %s: %s"), cls->folder_path, strerror(errno));
        return -1;
    }

    /* keeps track of all uid's that have not been processed */
    left = g_hash_table_new(g_str_hash, g_str_equal);
    count = camel_folder_summary_count((CamelFolderSummary *)cls);
    forceindex = count == 0;
    for (i=0;i<count;i++) {
        info = camel_folder_summary_index((CamelFolderSummary *)cls, i);
        if (info) {
            g_hash_table_insert(left, (char *)camel_message_info_uid(info), info);
        }
    }

    while ( (d = readdir(dir)) ) {
        /* FIXME: also run stat to check for regular file */
        p = d->d_name;
        while ( (c = *p++) ) {
            if (!isdigit(c))
                break;
        }
        if (c==0) {
            info = camel_folder_summary_uid((CamelFolderSummary *)cls, d->d_name);
            if (info == NULL || (cls->index && (!ibex_contains_name(cls->index, d->d_name)))) {
                /* need to add this file to the summary */
                if (info != NULL) {
                    g_hash_table_remove(left, camel_message_info_uid(info));
                    camel_folder_summary_remove((CamelFolderSummary *)cls, info);
                    camel_folder_summary_info_free((CamelFolderSummary *)cls, info);
                }
                camel_mh_summary_add(cls, d->d_name, forceindex);
            } else {
                const char *uid = camel_message_info_uid(info);
                CamelMessageInfo *old = g_hash_table_lookup(left, uid);

                if (old) {
                    camel_folder_summary_info_free((CamelFolderSummary *)cls, old);
                    g_hash_table_remove(left, uid);
                }
                camel_folder_summary_info_free((CamelFolderSummary *)cls, info);
            }   
        }
    }
    closedir(dir);
    g_hash_table_foreach(left, (GHFunc)remove_summary, cls);
    g_hash_table_destroy(left);

    return 0;
}

static int
mh_summary_sync_message(CamelLocalSummary *cls, CamelMessageInfo *info, CamelException *ex)
{
    CamelMimeParser *mp;
    const char *xev, *buffer;
    int xevoffset;
    int fd, outfd, len, outlen, ret=0;
    char *name, *tmpname, *xevnew;

    name = g_strdup_printf("%s/%s", cls->folder_path, camel_message_info_uid(info));
    fd = open(name, O_RDWR);
    if (fd == -1)
        return -1;

    mp = camel_mime_parser_new();
    camel_mime_parser_init_with_fd(mp, fd);
    if (camel_mime_parser_step(mp, 0, 0) != HSCAN_EOF) {
        xev = camel_mime_parser_header(mp, "X-Evolution", &xevoffset);
        d(printf("xev = '%s'\n", xev));
        xevnew = camel_local_summary_encode_x_evolution(cls, info);
        if (xev == NULL
            || camel_local_summary_decode_x_evolution(cls, xev, NULL) == -1
            || strlen(xev)-1 != strlen(xevnew)) {

            d(printf("camel local summary_decode_xev = %d\n", camel_local_summary_decode_x_evolution(cls, xev, NULL)));

            /* need to write a new copy/unlink old */
            tmpname = g_strdup_printf("%s/.tmp.%d.%s", cls->folder_path, getpid(), camel_message_info_uid(info));
            d(printf("old xev was %d %s new xev is %d %s\n", strlen(xev), xev, strlen(xevnew), xevnew));
            d(printf("creating new message %s\n", tmpname));
            outfd = open(tmpname, O_CREAT|O_WRONLY|O_TRUNC, 0600);
            if (outfd != -1) {
                outlen = 0;
                len = camel_local_summary_write_headers(outfd, camel_mime_parser_headers_raw(mp), xevnew);
                if (len != -1) {
                    while (outlen != -1 && (len = camel_mime_parser_read(mp, &buffer, 10240)) > 0) {
                        d(printf("camel mime parser read, read %d bytes: %.*s\n", len, len, buffer));
                        do {
                            outlen = write(outfd, buffer, len);
                        } while (outlen == -1 && errno == EINTR);
                    }
                }

                d(printf("len = %d outlen = %d, renaming/finishing\n", len, outlen));
                if (close(outfd) == -1
                    || len == -1
                    || outlen == -1
                    || rename(tmpname, name) == -1) {
                    unlink(tmpname);
                    ret = -1;
                }
            } else {
                g_warning("sync can't create tmp file: %s", strerror(errno));
            }
            g_free(tmpname);
        } else {
            d(printf("stamping in updated X-EV at %d\n", (int)xevoffset));
            /* else, we can just update the flags field */
            lseek(fd, xevoffset+strlen("X-Evolution: "), SEEK_SET);
            do {
                len = write(fd, xevnew, strlen(xevnew));
            } while (len == -1 && errno == EINTR);
            if (len == -1)
                ret = -1;
        }

        g_free(xevnew);
    }

    camel_object_unref((CamelObject *)mp);
    g_free(name);
    return ret;
}

/* sync the summary file with the ondisk files */
static int
mh_summary_sync(CamelLocalSummary *cls, gboolean expunge, CamelFolderChangeInfo *changes, CamelException *ex)
{
    int count, i;
    CamelMessageInfo *info;
    char *name;
    const char *uid;

    d(printf("summary_sync(expunge=%s)\n", expunge?"true":"false"));

    /* we could probably get away without this ... but why not use it, esp if we're going to
       be doing any significant io already */
    if (camel_local_summary_check(cls, changes, ex) == -1)
        return -1;

    count = camel_folder_summary_count((CamelFolderSummary *)cls);
    for (i=count-1;i>=0;i--) {
        info = camel_folder_summary_index((CamelFolderSummary *)cls, i);
        g_assert(info);
        if (expunge && (info->flags & CAMEL_MESSAGE_DELETED)) {
            uid = camel_message_info_uid(info);
            name = g_strdup_printf("%s/%s", cls->folder_path, uid);
            d(printf("deleting %s\n", name));
            if (unlink(name) == 0 || errno==ENOENT) {

                /* FIXME: put this in folder_summary::remove()? */
                if (cls->index)
                    ibex_unindex(cls->index, (char *)uid);
                
                camel_folder_change_info_remove_uid(changes, uid);
                camel_folder_summary_remove((CamelFolderSummary *)cls, info);
            }
            g_free(name);
        } else if (info->flags & (CAMEL_MESSAGE_FOLDER_NOXEV|CAMEL_MESSAGE_FOLDER_FLAGGED)) {
            if (mh_summary_sync_message(cls, info, ex) != -1) {
                info->flags &= 0xffff;
            } else {
                g_warning("Problem occured when trying to expunge, ignored");
            }
        }
        camel_folder_summary_info_free((CamelFolderSummary *)cls, info);
    }

    return ((CamelLocalSummaryClass *)parent_class)->sync(cls, expunge, changes, ex);
}