aboutsummaryrefslogtreecommitdiffhomepage
path: root/lib/thread.cc
blob: 9e4cb5c89174cc697af2c3f828a66eeb9497024a (plain)
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
/* thread.cc - Results of thread-based searches from a notmuch database
 *
 * Copyright © 2009 Carl Worth
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * 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, see http://www.gnu.org/licenses/ .
 *
 * Author: Carl Worth <cworth@cworth.org>
 */

#include "notmuch-private.h"
#include "database-private.h"

#include <xapian.h>

#include <gmime/gmime.h>
#include <glib.h> /* GHashTable */

struct _notmuch_thread {
    notmuch_database_t *notmuch;
    char *thread_id;
    char *subject;
    GHashTable *authors_hash;
    char *authors;
    GHashTable *tags;

    notmuch_message_list_t *message_list;
    GHashTable *message_hash;
    int total_messages;
    int matched_messages;
    time_t oldest;
    time_t newest;
};

static int
_notmuch_thread_destructor (notmuch_thread_t *thread)
{
    g_hash_table_unref (thread->authors_hash);
    g_hash_table_unref (thread->tags);
    g_hash_table_unref (thread->message_hash);

    return 0;
}

static void
_thread_add_author (notmuch_thread_t *thread,
		    const char *author)
{
    if (author == NULL)
	return;

    if (g_hash_table_lookup_extended (thread->authors_hash,
				      author, NULL, NULL))
	return;

    g_hash_table_insert (thread->authors_hash, xstrdup (author), NULL);

    if (thread->authors)
	thread->authors = talloc_asprintf (thread, "%s, %s",
					   thread->authors,
					   author);
    else
	thread->authors = talloc_strdup (thread, author);
}

/* Add 'message' as a message that belongs to 'thread'.
 *
 * The 'thread' will talloc_steal the 'message' and hold onto a
 * reference to it.
 */
static void
_thread_add_message (notmuch_thread_t *thread,
		     notmuch_message_t *message)
{
    notmuch_tags_t *tags;
    const char *tag;
    InternetAddressList *list;
    InternetAddress *address;
    const char *from, *author;

    _notmuch_message_list_add_message (thread->message_list,
				       talloc_steal (thread, message));
    thread->total_messages++;

    g_hash_table_insert (thread->message_hash,
			 xstrdup (notmuch_message_get_message_id (message)),
			 message);

    from = notmuch_message_get_header (message, "from");
    list = internet_address_list_parse_string (from);
    if (list) {
	address = internet_address_list_get_address (list, 0);
	if (address) {
	    author = internet_address_get_name (address);
	    if (author == NULL) {
		InternetAddressMailbox *mailbox;
		mailbox = INTERNET_ADDRESS_MAILBOX (address);
		author = internet_address_mailbox_get_addr (mailbox);
	    }
	    _thread_add_author (thread, author);
	}
	g_object_unref (G_OBJECT (list));
    }

    if (! thread->subject) {
	const char *subject;
	subject = notmuch_message_get_header (message, "subject");
	thread->subject = talloc_strdup (thread, subject);
    }

    for (tags = notmuch_message_get_tags (message);
	 notmuch_tags_has_more (tags);
	 notmuch_tags_advance (tags))
    {
	tag = notmuch_tags_get (tags);
	g_hash_table_insert (thread->tags, xstrdup (tag), NULL);
    }
}

static void
_thread_add_matched_message (notmuch_thread_t *thread,
			     notmuch_message_t *message)
{
    time_t date;
    notmuch_message_t *hashed_message;

    date = notmuch_message_get_date (message);

    if (date < thread->oldest || ! thread->matched_messages)
	thread->oldest = date;

    if (date > thread->newest || ! thread->matched_messages)
	thread->newest = date;

    thread->matched_messages++;

    if (g_hash_table_lookup_extended (thread->message_hash,
			    notmuch_message_get_message_id (message), NULL,
			    (void **) &hashed_message)) {
	notmuch_message_set_flag (hashed_message,
			NOTMUCH_MSG_FLAG_MATCHING_SEARCH, 1);
    }
}

static void
_resolve_thread_relationships (unused (notmuch_thread_t *thread))
{
    notmuch_message_node_t **prev, *node;
    notmuch_message_t *message, *parent;
    const char *in_reply_to;

    prev = &thread->message_list->head;
    while ((node = *prev)) {
	message = node->message;
	in_reply_to = _notmuch_message_get_in_reply_to (message);
	if (in_reply_to && strlen (in_reply_to) &&
	    g_hash_table_lookup_extended (thread->message_hash,
					  in_reply_to, NULL,
					  (void **) &parent))
	{
	    *prev = node->next;
	    if (thread->message_list->tail == &node->next)
		thread->message_list->tail = prev;
	    node->next = NULL;
	    _notmuch_message_add_reply (parent, node);
	} else {
	    prev = &((*prev)->next);
	}
    }

    /* XXX: After scanning through the entire list looking for parents
     * via "In-Reply-To", we should do a second pass that looks at the
     * list of messages IDs in the "References" header instead. (And
     * for this the parent would be the "deepest" message of all the
     * messages found in the "References" list.)
     *
     * Doing this will allow messages and sub-threads to be positioned
     * correctly in the thread even when an intermediate message is
     * missing from the thread.
     */
}

/* Create a new notmuch_thread_t object for the given thread ID,
 * treating any messages matching 'query_string' as "matched".
 *
 * Creating the thread will trigger two database searches. The first
 * is for all messages belonging to the thread, (to get the first
 * subject line, the total count of messages, and all authors). The
 * second search is for all messages that are in the thread and that
 * also match the given query_string. This is to allow for a separate
 * count of matched messages, and to allow a viewer to display these
 * messages differently.
 *
 * Here, 'ctx' is talloc context for the resulting thread object.
 *
 * This function returns NULL in the case of any error.
 */
notmuch_thread_t *
_notmuch_thread_create (void *ctx,
			notmuch_database_t *notmuch,
			const char *thread_id,
			const char *query_string)
{
    notmuch_thread_t *thread;
    const char *thread_id_query_string, *matched_query_string;
    notmuch_query_t *thread_id_query, *matched_query;
    notmuch_messages_t *messages;
    notmuch_message_t *message;

    thread_id_query_string = talloc_asprintf (ctx, "thread:%s", thread_id);
    if (unlikely (query_string == NULL))
	return NULL;

    /* XXX: We could be a bit more efficient here if
     * thread_id_query_string is identical to query_string, (then we
     * could get by with just one database search instead of two). */

    matched_query_string = talloc_asprintf (ctx, "%s AND (%s)",
					    thread_id_query_string,
					    query_string);
    if (unlikely (matched_query_string == NULL))
	return NULL;

    thread_id_query = notmuch_query_create (notmuch, thread_id_query_string);
    if (unlikely (thread_id_query == NULL))
	return NULL;

    matched_query = notmuch_query_create (notmuch, matched_query_string);
    if (unlikely (thread_id_query == NULL))
	return NULL;

    thread = talloc (ctx, notmuch_thread_t);
    if (unlikely (thread == NULL))
	return NULL;

    talloc_set_destructor (thread, _notmuch_thread_destructor);

    thread->notmuch = notmuch;
    thread->thread_id = talloc_strdup (thread, thread_id);
    thread->subject = NULL;
    thread->authors_hash = g_hash_table_new_full (g_str_hash, g_str_equal,
						  free, NULL);
    thread->authors = NULL;
    thread->tags = g_hash_table_new_full (g_str_hash, g_str_equal,
					  free, NULL);

    thread->message_list = _notmuch_message_list_create (thread);
    if (unlikely (thread->message_list == NULL))
	return NULL;

    thread->message_hash = g_hash_table_new_full (g_str_hash, g_str_equal,
						  free, NULL);

    thread->total_messages = 0;
    thread->matched_messages = 0;
    thread->oldest = 0;
    thread->newest = 0;

    notmuch_query_set_sort (thread_id_query, NOTMUCH_SORT_OLDEST_FIRST);

    for (messages = notmuch_query_search_messages (thread_id_query);
	 notmuch_messages_has_more (messages);
	 notmuch_messages_advance (messages))
    {
	message = notmuch_messages_get (messages);
	_thread_add_message (thread, message);
	_notmuch_message_close (message);
    }

    notmuch_query_destroy (thread_id_query);

    for (messages = notmuch_query_search_messages (matched_query);
	 notmuch_messages_has_more (messages);
	 notmuch_messages_advance (messages))
    {
	message = notmuch_messages_get (messages);
	_thread_add_matched_message (thread, message);
	_notmuch_message_close (message);
    }

    notmuch_query_destroy (matched_query);

    _resolve_thread_relationships (thread);

    return thread;
}

notmuch_messages_t *
notmuch_thread_get_toplevel_messages (notmuch_thread_t *thread)
{
    return _notmuch_messages_create (thread->message_list);
}

const char *
notmuch_thread_get_thread_id (notmuch_thread_t *thread)
{
    return thread->thread_id;
}

int
notmuch_thread_get_total_messages (notmuch_thread_t *thread)
{
    return thread->total_messages;
}

int
notmuch_thread_get_matched_messages (notmuch_thread_t *thread)
{
    return thread->matched_messages;
}

const char *
notmuch_thread_get_authors (notmuch_thread_t *thread)
{
    return thread->authors;
}

const char *
notmuch_thread_get_subject (notmuch_thread_t *thread)
{
    return thread->subject;
}

time_t
notmuch_thread_get_oldest_date (notmuch_thread_t *thread)
{
    return thread->oldest;
}

time_t
notmuch_thread_get_newest_date (notmuch_thread_t *thread)
{
    return thread->newest;
}

notmuch_tags_t *
notmuch_thread_get_tags (notmuch_thread_t *thread)
{
    notmuch_tags_t *tags;
    GList *keys, *l;

    tags = _notmuch_tags_create (thread);
    if (unlikely (tags == NULL))
	return NULL;

    keys = g_hash_table_get_keys (thread->tags);

    for (l = keys; l; l = l->next)
	_notmuch_tags_add_tag (tags, (char *) l->data);

    g_list_free (keys);

    _notmuch_tags_prepare_iterator (tags);

    return tags;
}

void
notmuch_thread_destroy (notmuch_thread_t *thread)
{
    talloc_free (thread);
}