forked from GNUsocial/gnu-social
132 lines
4.3 KiB
PHP
132 lines
4.3 KiB
PHP
<?php
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/*
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* StatusNet - the distributed open-source microblogging tool
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* Copyright (C) 2008, 2009, StatusNet, Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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if (!defined('STATUSNET')) {
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exit(1);
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}
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class SphinxSearch extends SearchEngine
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{
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private $sphinx;
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private $connected;
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function __construct($target, $table)
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{
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$fp = @fsockopen(common_config('sphinx', 'server'), common_config('sphinx', 'port'));
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if (!$fp) {
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$this->connected = false;
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return;
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}
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fclose($fp);
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parent::__construct($target, $table);
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$this->sphinx = new SphinxClient;
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$this->sphinx->setServer(common_config('sphinx', 'server'), common_config('sphinx', 'port'));
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$this->connected = true;
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}
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function is_connected()
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{
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return $this->connected;
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}
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function limit($offset, $count, $rss = false)
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{
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//FIXME without LARGEST_POSSIBLE, the most recent results aren't returned
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// this probably has a large impact on performance
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$LARGEST_POSSIBLE = 1e6;
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if ($rss) {
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$this->sphinx->setLimits($offset, $count, $count, $LARGEST_POSSIBLE);
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}
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else {
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// return at most 50 pages of results
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$this->sphinx->setLimits($offset, $count, 50 * ($count - 1), $LARGEST_POSSIBLE);
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}
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return $this->target->limit(0, $count);
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}
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function query($q)
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{
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$result = $this->sphinx->query($q, $this->remote_table());
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if ($result === false) {
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throw new ServerException($this->sphinx->getLastError());
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}
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if (!isset($result['matches'])) return false;
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$id_set = join(', ', array_keys($result['matches']));
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$this->target->whereAdd("id in ($id_set)");
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return true;
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}
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function set_sort_mode($mode)
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{
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switch ($mode) {
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case 'chron':
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$this->sphinx->SetSortMode(SPH_SORT_ATTR_DESC, 'created_ts');
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return $this->target->orderBy('id desc');
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break;
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case 'reverse_chron':
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$this->sphinx->SetSortMode(SPH_SORT_ATTR_ASC, 'created_ts');
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return $this->target->orderBy('id asc');
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break;
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case 'nickname_desc':
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if ($this->table != 'profile') {
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throw new Exception(
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'nickname_desc sort mode can only be use when searching profile.'
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);
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} else {
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$this->sphinx->SetSortMode(SPH_SORT_ATTR_DESC, 'nickname');
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return $this->target->orderBy('id desc');
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}
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break;
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case 'nickname_asc':
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if ($this->table != 'profile') {
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throw new Exception(
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'nickname_desc sort mode can only be use when searching profile.'
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);
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} else {
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$this->sphinx->SetSortMode(SPH_SORT_ATTR_ASC, 'nickname');
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return $this->target->orderBy('id asc');
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}
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break;
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default:
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$this->sphinx->SetSortMode(SPH_SORT_ATTR_DESC, 'created_ts');
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return $this->target->orderBy('id desc');
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break;
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}
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}
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function remote_table()
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{
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return $this->dbname() . '_' . $this->table;
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}
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function dbname()
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{
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// @fixme there should be a less dreadful way to do this.
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// DB objects won't give database back until they connect, it's confusing
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if (preg_match('!^.*?://.*?:.*?@.*?/(.*?)$!', common_config('db', 'database'), $matches)) {
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return $matches[1];
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}
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// TRANS: Server exception thrown when a database name cannot be identified.
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throw new ServerException(_m("Sphinx search could not identify database name."));
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}
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}
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