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<?php
/*
* StatusNet - the distributed open-source microblogging tool
* Copyright (C) 2008, 2009, StatusNet, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
if (!defined('STATUSNET')) {
exit(1);
}
class SphinxSearch extends SearchEngine
{
private $sphinx;
private $connected;
function __construct($target, $table)
{
$fp = @fsockopen(common_config('sphinx', 'server'), common_config('sphinx', 'port'));
if (!$fp) {
$this->connected = false;
return;
}
fclose($fp);
parent::__construct($target, $table);
$this->sphinx = new SphinxClient;
$this->sphinx->setServer(common_config('sphinx', 'server'), common_config('sphinx', 'port'));
$this->connected = true;
}
function is_connected()
{
return $this->connected;
}
function limit($offset, $count, $rss = false)
{
//FIXME without LARGEST_POSSIBLE, the most recent results aren't returned
// this probably has a large impact on performance
$LARGEST_POSSIBLE = 1e6;
if ($rss) {
$this->sphinx->setLimits($offset, $count, $count, $LARGEST_POSSIBLE);
}
else {
// return at most 50 pages of results
$this->sphinx->setLimits($offset, $count, 50 * ($count - 1), $LARGEST_POSSIBLE);
}
return $this->target->limit(0, $count);
}
function query($q)
{
$result = $this->sphinx->query($q, $this->remote_table());
if (!isset($result['matches'])) return false;
$id_set = join(', ', array_keys($result['matches']));
$this->target->whereAdd("id in ($id_set)");
return true;
}
function set_sort_mode($mode)
{
if ('chron' === $mode) {
$this->sphinx->SetSortMode(SPH_SORT_ATTR_DESC, 'created_ts');
return $this->target->orderBy('id desc');
}
}
function remote_table()
{
return $this->dbname() . '_' . $this->table;
}
function dbname()
{
// @fixme there should be a less dreadful way to do this.
// DB objects won't give database back until they connect, it's confusing
if (preg_match('!^.*?://.*?:.*?@.*?/(.*?)$!', common_config('db', 'database'), $matches)) {
return $matches[1];
}
// TRANS: Server exception thrown when a database name cannot be identified.
throw new ServerException(_m("Sphinx search could not identify database name."));
}
}
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