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<?php
/*
* Laconica - a distributed open-source microblogging tool
* Copyright (C) 2008, Controlez-Vous, 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('LACONICA')) { exit(1); }
class SearchEngine {
protected $target;
protected $table;
function __construct($target, $table) {
$this->target = $target;
$this->table = $table;
}
function query($q) {
}
function limit($offset, $count, $rss = false) {
return $this->target->limit($offset, $count);
}
function set_sort_mode($mode) {
if ('chron' === $mode)
return $this->target->orderBy('created desc');
}
}
class SphinxSearch extends SearchEngine {
private $sphinx;
function __construct($target, $table) {
parent::__construct($target, $table);
$this->sphinx = new SphinxClient;
$this->sphinx->setServer(common_config('sphinx', 'server'), common_config('sphinx', 'port'));
}
function limit($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, $this->table);
if (!isset($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 $this->target->orderBy('created desc');
}
}
}
class MySQLSearch extends SearchEngine {
function query($q) {
if ('identica_people' === $this->table)
return $this->target->whereAdd('MATCH(nickname, fullname, location, bio, homepage) ' .
'against (\''.addslashes($q).'\')');
if ('identica_notices' === $this->table)
return $this->target->whereAdd('MATCH(content) ' .
'against (\''.addslashes($q).'\')');
}
}
class PGSearch extends SearchEngine {
function query($q) {
if ('identica_people' === $this->table)
return $this->target->whereAdd('textsearch @@ plainto_tsquery(\''.addslashes($q).'\')');
if ('identica_notices' === $this->table)
return $this->target->whereAdd('to_tsvector(\'english\', content) @@ plainto_tsquery(\''.addslashes($q).'\')');
}
}
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