/* thread-fp.cc - "thread:" field processor glue
 *
 * This file is part of notmuch.
 *
 * Copyright © 2017 Jani Nikula
 *
 * 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 https://www.gnu.org/licenses/ .
 */

#include "database-private.h"
#include "thread-fp.h"

#if HAVE_XAPIAN_FIELD_PROCESSOR
Xapian::Query
ThreadFieldProcessor::operator() (const std::string & thread)
{
    std::string term_prefix = _find_prefix ("thread");
    std::string thread_id;
    notmuch_message_t *message = NULL;

    /*
     * Only support thread queries via message-ids that have @. The
     * reason for this is twofold: First, it's an optimization for
     * regular thread-id queries. Second, and more importantly, it
     * prevents (potentially malicious) message-id and thread-id
     * collisions. Regular thread-ids are guaranteed to not have @ in
     * them, and we only lose the ability to query threads by invalid
     * message-ids that don't have @ in them.
     */
    if (strchr (thread.c_str (), '@'))
	notmuch_database_find_message (notmuch, thread.c_str (), &message);

    if (message) {
	thread_id = notmuch_message_get_thread_id (message);
	notmuch_message_destroy (message);
    } else {
	thread_id = thread;
    }

    return Xapian::Query (term_prefix + thread_id);
}
#endif