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<?php
/*
* Created on July 7, 2007
*
* API for MediaWiki 1.8+
*
* Copyright (C) 2006 Yuri Astrakhan <Firstname><Lastname>@gmail.com
*
* 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 2 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, write to the Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
* http://www.gnu.org/copyleft/gpl.html
*/
if (!defined('MEDIAWIKI')) {
// Eclipse helper - will be ignored in production
require_once ('ApiQueryBase.php');
}
/**
* Query module to enumerate links from all pages together.
*
* @ingroup API
*/
class ApiQueryAllLinks extends ApiQueryGeneratorBase {
public function __construct($query, $moduleName) {
parent :: __construct($query, $moduleName, 'al');
}
public function execute() {
$this->run();
}
public function executeGenerator($resultPageSet) {
$this->run($resultPageSet);
}
private function run($resultPageSet = null) {
$db = $this->getDB();
$params = $this->extractRequestParams();
$prop = array_flip($params['prop']);
$fld_ids = isset($prop['ids']);
$fld_title = isset($prop['title']);
if ($params['unique']) {
if (!is_null($resultPageSet))
$this->dieUsage($this->getModuleName() . ' cannot be used as a generator in unique links mode', 'params');
if ($fld_ids)
$this->dieUsage($this->getModuleName() . ' cannot return corresponding page ids in unique links mode', 'params');
$this->addOption('DISTINCT');
}
$this->addTables('pagelinks');
$this->addWhereFld('pl_namespace', $params['namespace']);
if (!is_null($params['from']) && !is_null($params['continue']))
$this->dieUsage('alcontinue and alfrom cannot be used together', 'params');
if (!is_null($params['continue']))
{
$arr = explode('|', $params['continue']);
if(count($arr) != 2)
$this->dieUsage("Invalid continue parameter", 'badcontinue');
$from = $this->getDB()->strencode($this->titleToKey($arr[0]));
$id = intval($arr[1]);
$this->addWhere("pl_title > '$from' OR " .
"(pl_title = '$from' AND " .
"pl_from > $id)");
}
if (!is_null($params['from']))
$this->addWhere('pl_title>=' . $db->addQuotes($this->titlePartToKey($params['from'])));
if (isset ($params['prefix']))
$this->addWhere("pl_title LIKE '" . $db->escapeLike($this->titlePartToKey($params['prefix'])) . "%'");
$this->addFields(array (
'pl_title',
));
$this->addFieldsIf('pl_from', !$params['unique']);
$this->addOption('USE INDEX', 'pl_namespace');
$limit = $params['limit'];
$this->addOption('LIMIT', $limit+1);
if($params['unique'])
$this->addOption('ORDER BY', 'pl_title');
else
$this->addOption('ORDER BY', 'pl_title, pl_from');
$res = $this->select(__METHOD__);
$pageids = array ();
$count = 0;
$result = $this->getResult();
while ($row = $db->fetchObject($res)) {
if (++ $count > $limit) {
// We've reached the one extra which shows that there are additional pages to be had. Stop here...
// TODO: Security issue - if the user has no right to view next title, it will still be shown
if($params['unique'])
$this->setContinueEnumParameter('from', $this->keyToTitle($row->pl_title));
else
$this->setContinueEnumParameter('continue', $this->keyToTitle($row->pl_title) . "|" . $row->pl_from);
break;
}
if (is_null($resultPageSet)) {
$vals = array();
if ($fld_ids)
$vals['fromid'] = intval($row->pl_from);
if ($fld_title) {
$title = Title :: makeTitle($params['namespace'], $row->pl_title);
ApiQueryBase::addTitleInfo($vals, $title);
}
$fit = $result->addValue(array('query', $this->getModuleName()), null, $vals);
if(!$fit)
{
if($params['unique'])
$this->setContinueEnumParameter('from', $this->keyToTitle($row->pl_title));
else
$this->setContinueEnumParameter('continue', $this->keyToTitle($row->pl_title) . "|" . $row->pl_from);
break;
}
} else {
$pageids[] = $row->pl_from;
}
}
$db->freeResult($res);
if (is_null($resultPageSet)) {
$result->setIndexedTagName_internal(array('query', $this->getModuleName()), 'l');
} else {
$resultPageSet->populateFromPageIDs($pageids);
}
}
public function getAllowedParams() {
return array (
'continue' => null,
'from' => null,
'prefix' => null,
'unique' => false,
'prop' => array (
ApiBase :: PARAM_ISMULTI => true,
ApiBase :: PARAM_DFLT => 'title',
ApiBase :: PARAM_TYPE => array (
'ids',
'title'
)
),
'namespace' => array (
ApiBase :: PARAM_DFLT => 0,
ApiBase :: PARAM_TYPE => 'namespace'
),
'limit' => array (
ApiBase :: PARAM_DFLT => 10,
ApiBase :: PARAM_TYPE => 'limit',
ApiBase :: PARAM_MIN => 1,
ApiBase :: PARAM_MAX => ApiBase :: LIMIT_BIG1,
ApiBase :: PARAM_MAX2 => ApiBase :: LIMIT_BIG2
)
);
}
public function getParamDescription() {
return array (
'from' => 'The page title to start enumerating from.',
'prefix' => 'Search for all page titles that begin with this value.',
'unique' => 'Only show unique links. Cannot be used with generator or prop=ids',
'prop' => 'What pieces of information to include',
'namespace' => 'The namespace to enumerate.',
'limit' => 'How many total links to return.',
'continue' => 'When more results are available, use this to continue.',
);
}
public function getDescription() {
return 'Enumerate all links that point to a given namespace';
}
protected function getExamples() {
return array (
'api.php?action=query&list=alllinks&alunique&alfrom=B',
);
}
public function getVersion() {
return __CLASS__ . ': $Id: ApiQueryAllLinks.php 47865 2009-02-27 16:03:01Z catrope $';
}
}
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