+++ /dev/null
-/* query.cc - Support for searching 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 <glib.h> /* GHashTable, GPtrArray */
-
-#include <xapian.h>
-
-struct _notmuch_query {
- notmuch_database_t *notmuch;
- const char *query_string;
- notmuch_sort_t sort;
-};
-
-struct _notmuch_messages {
- notmuch_database_t *notmuch;
- Xapian::MSetIterator iterator;
- Xapian::MSetIterator iterator_end;
-};
-
-struct _notmuch_threads {
- notmuch_database_t *notmuch;
- GPtrArray *threads;
- unsigned int index;
-};
-
-notmuch_query_t *
-notmuch_query_create (notmuch_database_t *notmuch,
- const char *query_string)
-{
- notmuch_query_t *query;
-
-#ifdef DEBUG_QUERY
- fprintf (stderr, "Query string is:\n%s\n", query_string);
-#endif
-
- query = talloc (NULL, notmuch_query_t);
- if (unlikely (query == NULL))
- return NULL;
-
- query->notmuch = notmuch;
-
- query->query_string = talloc_strdup (query, query_string);
-
- query->sort = NOTMUCH_SORT_DATE_OLDEST_FIRST;
-
- return query;
-}
-
-void
-notmuch_query_set_sort (notmuch_query_t *query, notmuch_sort_t sort)
-{
- query->sort = sort;
-}
-
-/* We end up having to call the destructors explicitly because we had
- * to use "placement new" in order to initialize C++ objects within a
- * block that we allocated with talloc. So C++ is making talloc
- * slightly less simple to use, (we wouldn't need
- * talloc_set_destructor at all otherwise).
- */
-static int
-_notmuch_messages_destructor (notmuch_messages_t *messages)
-{
- messages->iterator.~MSetIterator ();
- messages->iterator_end.~MSetIterator ();
-
- return 0;
-}
-
-notmuch_messages_t *
-notmuch_query_search_messages (notmuch_query_t *query)
-{
- notmuch_database_t *notmuch = query->notmuch;
- const char *query_string = query->query_string;
- notmuch_messages_t *messages;
-
- messages = talloc (query, notmuch_messages_t);
- if (unlikely (messages == NULL))
- return NULL;
-
- try {
- Xapian::Enquire enquire (*notmuch->xapian_db);
- Xapian::Query mail_query (talloc_asprintf (query, "%s%s",
- _find_prefix ("type"),
- "mail"));
- Xapian::Query string_query, final_query;
- Xapian::MSet mset;
- unsigned int flags = (Xapian::QueryParser::FLAG_BOOLEAN |
- Xapian::QueryParser::FLAG_PHRASE |
- Xapian::QueryParser::FLAG_LOVEHATE |
- Xapian::QueryParser::FLAG_BOOLEAN_ANY_CASE |
- Xapian::QueryParser::FLAG_WILDCARD);
-
- if (strcmp (query_string, "") == 0) {
- final_query = mail_query;
- } else {
- string_query = notmuch->query_parser->
- parse_query (query_string, flags);
- final_query = Xapian::Query (Xapian::Query::OP_AND,
- mail_query, string_query);
- }
-
- switch (query->sort) {
- case NOTMUCH_SORT_DATE_OLDEST_FIRST:
- enquire.set_sort_by_value (NOTMUCH_VALUE_TIMESTAMP, FALSE);
- break;
- case NOTMUCH_SORT_DATE_NEWEST_FIRST:
- enquire.set_sort_by_value (NOTMUCH_VALUE_TIMESTAMP, TRUE);
- break;
- case NOTMUCH_SORT_MESSAGE_ID:
- enquire.set_sort_by_value (NOTMUCH_VALUE_MESSAGE_ID, FALSE);
- break;
- }
-
-#if DEBUG_QUERY
- fprintf (stderr, "Final query is:\n%s\n", final_query.get_description().c_str());
-#endif
-
- enquire.set_query (final_query);
-
- mset = enquire.get_mset (0, notmuch->xapian_db->get_doccount ());
-
- messages->notmuch = notmuch;
-
- new (&messages->iterator) Xapian::MSetIterator ();
- new (&messages->iterator_end) Xapian::MSetIterator ();
-
- talloc_set_destructor (messages, _notmuch_messages_destructor);
-
- messages->iterator = mset.begin ();
- messages->iterator_end = mset.end ();
-
- } catch (const Xapian::Error &error) {
- fprintf (stderr, "A Xapian exception occurred: %s\n",
- error.get_msg().c_str());
- }
-
- return messages;
-}
-
-/* Glib objects force use to use a talloc destructor as well, (but not
- * nearly as ugly as the for messages due to C++ objects). At
- * this point, I'd really like to have some talloc-friendly
- * equivalents for the few pieces of glib that I'm using. */
-static int
-_notmuch_threads_destructor (notmuch_threads_t *threads)
-{
- g_ptr_array_free (threads->threads, TRUE);
-
- return 0;
-}
-
-notmuch_threads_t *
-notmuch_query_search_threads (notmuch_query_t *query)
-{
- notmuch_threads_t *threads;
- notmuch_thread_t *thread;
- const char *thread_id;
- notmuch_messages_t *messages;
- notmuch_message_t *message;
- GHashTable *seen;
-
- threads = talloc (query, notmuch_threads_t);
- if (threads == NULL)
- return NULL;
-
- threads->notmuch = query->notmuch;
- threads->threads = g_ptr_array_new ();
- threads->index = 0;
-
- talloc_set_destructor (threads, _notmuch_threads_destructor);
-
- seen = g_hash_table_new_full (g_str_hash, g_str_equal,
- free, NULL);
-
- for (messages = notmuch_query_search_messages (query);
- notmuch_messages_has_more (messages);
- notmuch_messages_advance (messages))
- {
- message = notmuch_messages_get (messages);
-
- thread_id = notmuch_message_get_thread_id (message);
-
- if (! g_hash_table_lookup_extended (seen,
- thread_id, NULL,
- (void **) &thread))
- {
- thread = _notmuch_thread_create (query, query->notmuch,
- thread_id);
-
- g_hash_table_insert (seen, xstrdup (thread_id), thread);
-
- g_ptr_array_add (threads->threads, thread);
- }
-
- _notmuch_thread_add_message (thread, message);
-
- notmuch_message_destroy (message);
- }
-
- g_hash_table_unref (seen);
-
- return threads;
-}
-
-void
-notmuch_query_destroy (notmuch_query_t *query)
-{
- talloc_free (query);
-}
-
-notmuch_bool_t
-notmuch_messages_has_more (notmuch_messages_t *messages)
-{
- return (messages->iterator != messages->iterator_end);
-}
-
-notmuch_message_t *
-notmuch_messages_get (notmuch_messages_t *messages)
-{
- notmuch_message_t *message;
- Xapian::docid doc_id;
- notmuch_private_status_t status;
-
- if (! notmuch_messages_has_more (messages))
- return NULL;
-
- doc_id = *messages->iterator;
-
- message = _notmuch_message_create (messages,
- messages->notmuch, doc_id,
- &status);
-
- if (message == NULL &&
- status == NOTMUCH_PRIVATE_STATUS_NO_DOCUMENT_FOUND)
- {
- INTERNAL_ERROR ("a messages iterator contains a non-existent document ID.\n");
- }
-
- return message;
-}
-
-void
-notmuch_messages_advance (notmuch_messages_t *messages)
-{
- messages->iterator++;
-}
-
-void
-notmuch_messages_destroy (notmuch_messages_t *messages)
-{
- talloc_free (messages);
-}
-
-notmuch_bool_t
-notmuch_threads_has_more (notmuch_threads_t *threads)
-{
- return (threads->index < threads->threads->len);
-}
-
-notmuch_thread_t *
-notmuch_threads_get (notmuch_threads_t *threads)
-{
- if (! notmuch_threads_has_more (threads))
- return NULL;
-
- return (notmuch_thread_t *) g_ptr_array_index (threads->threads,
- threads->index);
-}
-
-void
-notmuch_threads_advance (notmuch_threads_t *threads)
-{
- threads->index++;
-}
-
-void
-notmuch_threads_destroy (notmuch_threads_t *threads)
-{
- talloc_free (threads);
-}
projects / notmuch / blobdiff