1 /* query.cc - Support for searching a notmuch database
3 * Copyright © 2009 Carl Worth
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 3 of the License, or
8 * (at your option) any later version.
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.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see http://www.gnu.org/licenses/ .
18 * Author: Carl Worth <cworth@cworth.org>
21 #include "notmuch-private.h"
22 #include "database-private.h"
24 #include <glib.h> /* GHashTable, GPtrArray */
28 struct _notmuch_query {
29 notmuch_database_t *notmuch;
30 const char *query_string;
34 struct _notmuch_messages {
35 notmuch_database_t *notmuch;
36 Xapian::MSetIterator iterator;
37 Xapian::MSetIterator iterator_end;
40 struct _notmuch_threads {
41 notmuch_query_t *query;
43 notmuch_messages_t *messages;
45 /* This thread ID is our iterator state. */
46 const char *thread_id;
50 notmuch_query_create (notmuch_database_t *notmuch,
51 const char *query_string)
53 notmuch_query_t *query;
56 fprintf (stderr, "Query string is:\n%s\n", query_string);
59 query = talloc (NULL, notmuch_query_t);
60 if (unlikely (query == NULL))
63 query->notmuch = notmuch;
65 query->query_string = talloc_strdup (query, query_string);
67 query->sort = NOTMUCH_SORT_NEWEST_FIRST;
73 notmuch_query_set_sort (notmuch_query_t *query, notmuch_sort_t sort)
79 notmuch_query_search_messages (notmuch_query_t *query,
83 notmuch_database_t *notmuch = query->notmuch;
84 const char *query_string = query->query_string;
85 notmuch_message_list_t *message_list;
86 Xapian::MSetIterator i;
88 message_list = _notmuch_message_list_create (query);
89 if (unlikely (message_list == NULL))
93 Xapian::Enquire enquire (*notmuch->xapian_db);
94 Xapian::Query mail_query (talloc_asprintf (query, "%s%s",
95 _find_prefix ("type"),
97 Xapian::Query string_query, final_query;
99 unsigned int flags = (Xapian::QueryParser::FLAG_BOOLEAN |
100 Xapian::QueryParser::FLAG_PHRASE |
101 Xapian::QueryParser::FLAG_LOVEHATE |
102 Xapian::QueryParser::FLAG_BOOLEAN_ANY_CASE |
103 Xapian::QueryParser::FLAG_WILDCARD |
104 Xapian::QueryParser::FLAG_PURE_NOT);
106 if (strcmp (query_string, "") == 0) {
107 final_query = mail_query;
109 string_query = notmuch->query_parser->
110 parse_query (query_string, flags);
111 final_query = Xapian::Query (Xapian::Query::OP_AND,
112 mail_query, string_query);
115 switch (query->sort) {
116 case NOTMUCH_SORT_OLDEST_FIRST:
117 enquire.set_sort_by_value (NOTMUCH_VALUE_TIMESTAMP, FALSE);
119 case NOTMUCH_SORT_NEWEST_FIRST:
120 enquire.set_sort_by_value (NOTMUCH_VALUE_TIMESTAMP, TRUE);
122 case NOTMUCH_SORT_MESSAGE_ID:
123 enquire.set_sort_by_value (NOTMUCH_VALUE_MESSAGE_ID, FALSE);
128 fprintf (stderr, "Final query is:\n%s\n", final_query.get_description().c_str());
131 enquire.set_query (final_query);
133 if (max_messages == -1)
134 max_messages = notmuch->xapian_db->get_doccount ();
135 mset = enquire.get_mset (first, max_messages);
137 for (i = mset.begin (); i != mset.end (); i++) {
138 notmuch_message_t *message;
139 notmuch_private_status_t status;
141 message = _notmuch_message_create (message_list, notmuch,
145 if (status == NOTMUCH_PRIVATE_STATUS_NO_DOCUMENT_FOUND)
146 INTERNAL_ERROR ("A message iterator contains a "
147 "non-existent document ID.\n");
151 _notmuch_message_list_add_message (message_list, message);
154 } catch (const Xapian::Error &error) {
155 fprintf (stderr, "A Xapian exception occurred performing query: %s\n",
156 error.get_msg().c_str());
157 fprintf (stderr, "Query string was: %s\n", query->query_string);
158 notmuch->exception_reported = TRUE;
161 return _notmuch_messages_create (message_list);
164 /* Glib objects force use to use a talloc destructor as well, (but not
165 * nearly as ugly as the for messages due to C++ objects). At
166 * this point, I'd really like to have some talloc-friendly
167 * equivalents for the few pieces of glib that I'm using. */
169 _notmuch_threads_destructor (notmuch_threads_t *threads)
171 g_hash_table_unref (threads->threads);
177 notmuch_query_search_threads (notmuch_query_t *query)
179 notmuch_threads_t *threads;
181 threads = talloc (query, notmuch_threads_t);
185 threads->query = query;
186 threads->threads = g_hash_table_new_full (g_str_hash, g_str_equal,
189 threads->messages = notmuch_query_search_messages (query, 0, -1);
191 threads->thread_id = NULL;
193 talloc_set_destructor (threads, _notmuch_threads_destructor);
199 notmuch_query_destroy (notmuch_query_t *query)
205 notmuch_threads_has_more (notmuch_threads_t *threads)
207 notmuch_message_t *message;
209 if (threads->thread_id)
212 while (notmuch_messages_has_more (threads->messages))
214 message = notmuch_messages_get (threads->messages);
216 threads->thread_id = notmuch_message_get_thread_id (message);
218 if (! g_hash_table_lookup_extended (threads->threads,
222 g_hash_table_insert (threads->threads,
223 xstrdup (threads->thread_id), NULL);
224 notmuch_messages_advance (threads->messages);
228 notmuch_messages_advance (threads->messages);
231 threads->thread_id = NULL;
236 notmuch_threads_get (notmuch_threads_t *threads)
238 if (! notmuch_threads_has_more (threads))
241 return _notmuch_thread_create (threads->query,
242 threads->query->notmuch,
244 threads->query->query_string);
248 notmuch_threads_advance (notmuch_threads_t *threads)
250 threads->thread_id = NULL;
254 notmuch_threads_destroy (notmuch_threads_t *threads)
256 talloc_free (threads);
260 notmuch_query_count_messages (notmuch_query_t *query)
262 notmuch_database_t *notmuch = query->notmuch;
263 const char *query_string = query->query_string;
264 Xapian::doccount count;
267 Xapian::Enquire enquire (*notmuch->xapian_db);
268 Xapian::Query mail_query (talloc_asprintf (query, "%s%s",
269 _find_prefix ("type"),
271 Xapian::Query string_query, final_query;
273 unsigned int flags = (Xapian::QueryParser::FLAG_BOOLEAN |
274 Xapian::QueryParser::FLAG_PHRASE |
275 Xapian::QueryParser::FLAG_LOVEHATE |
276 Xapian::QueryParser::FLAG_BOOLEAN_ANY_CASE |
277 Xapian::QueryParser::FLAG_WILDCARD |
278 Xapian::QueryParser::FLAG_PURE_NOT);
280 if (strcmp (query_string, "") == 0) {
281 final_query = mail_query;
283 string_query = notmuch->query_parser->
284 parse_query (query_string, flags);
285 final_query = Xapian::Query (Xapian::Query::OP_AND,
286 mail_query, string_query);
289 enquire.set_weighting_scheme(Xapian::BoolWeight());
290 enquire.set_docid_order(Xapian::Enquire::ASCENDING);
293 fprintf (stderr, "Final query is:\n%s\n", final_query.get_description().c_str());
296 enquire.set_query (final_query);
298 mset = enquire.get_mset (0, notmuch->xapian_db->get_doccount ());
300 count = mset.get_matches_estimated();
302 } catch (const Xapian::Error &error) {
303 fprintf (stderr, "A Xapian exception occurred: %s\n",
304 error.get_msg().c_str());
305 fprintf (stderr, "Query string was: %s\n", query->query_string);