includes/api/ApiQueryExtLinksUsage.php

   1 <?php
   2
   3 /*
   4  * Created on July 7, 2007
   5  *
   6  * API for MediaWiki 1.8+
   7  *
   8  * Copyright (C) 2006 Yuri Astrakhan <Firstname><Lastname>@gmail.com
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License along
  21  * with this program; if not, write to the Free Software Foundation, Inc.,
  22  * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  23  * http://www.gnu.org/copyleft/gpl.html
  24  */
  25
  26 if (!defined('MEDIAWIKI')) {
  27         // Eclipse helper - will be ignored in production
  28         require_once ('ApiQueryBase.php');
  29 }
  30
  31 /**
  32  * @addtogroup API
  33  */
  34 class ApiQueryExtLinksUsage extends ApiQueryGeneratorBase {
  35
  36         public function __construct($query, $moduleName) {
  37                 parent :: __construct($query, $moduleName, 'eu');
  38         }
  39
  40         public function execute() {
  41                 $this->run();
  42         }
  43
  44         public function executeGenerator($resultPageSet) {
  45                 $this->run($resultPageSet);
  46         }
  47
  48         private function run($resultPageSet = null) {
  49
  50                 $params = $this->extractRequestParams();
  51
  52                 $protocol = $params['protocol'];
  53                 $query = $params['query'];
  54                 if (is_null($query))
  55                         $this->dieUsage('Missing required query parameter', 'params');
  56
  57                 // Find the right prefix
  58                 global $wgUrlProtocols;
  59                 foreach ($wgUrlProtocols as $p) {
  60                         if( substr( $p, 0, strlen( $protocol ) ) === $protocol ) {
  61                                 $protocol = $p;
  62                                 break;
  63                         }
  64                 }
  65
  66                 $likeQuery = LinkFilter::makeLike($query , $protocol);
  67                 if (!$likeQuery)
  68                         $this->dieUsage('Invalid query', 'bad_query');
  69                 $likeQuery = substr($likeQuery, 0, strpos($likeQuery,'%')+1);
  70
  71                 $this->addTables(array('page','externallinks'));        // must be in this order for 'USE INDEX'
  72                 $this->addOption('USE INDEX', 'el_index');
  73
  74                 $db = $this->getDB();
  75                 $this->addWhere('page_id=el_from');
  76                 $this->addWhere('el_index LIKE ' . $db->addQuotes( $likeQuery ));
  77                 $this->addWhereFld('page_namespace', $params['namespace']);
  78
  79                 $prop = array_flip($params['prop']);
  80                 $fld_ids = isset($prop['ids']);
  81                 $fld_title = isset($prop['title']);
  82                 $fld_url = isset($prop['url']);
  83
  84                 if (is_null($resultPageSet)) {
  85                         $this->addFields(array (
  86                                 'page_id',
  87                                 'page_namespace',
  88                                 'page_title'
  89                         ));
  90                         $this->addFieldsIf('el_to', $fld_url);
  91                 } else {
  92                         $this->addFields($resultPageSet->getPageTableFields());
  93                 }
  94
  95                 $limit = $params['limit'];
  96                 $offset = $params['offset'];
  97                 $this->addOption('LIMIT', $limit +1);
  98                 if (isset ($offset))
  99                         $this->addOption('OFFSET', $offset);
 100
 101                 $res = $this->select(__METHOD__);
 102
 103                 $data = array ();
 104                 $count = 0;
 105                 while ($row = $db->fetchObject($res)) {
 106                         if (++ $count > $limit) {
 107                                 // We've reached the one extra which shows that there are additional pages to be had. Stop here...
 108                                 $this->setContinueEnumParameter('offset', $offset+$limit+1);
 109                                 break;
 110                         }
 111
 112                         if (is_null($resultPageSet)) {
 113                                 $vals = array();
 114                                 if ($fld_ids)
 115                                         $vals['pageid'] = intval($row->page_id);
 116                                 if ($fld_title) {
 117                                         $title = Title :: makeTitle($row->page_namespace, $row->page_title);
 118                                         $vals['ns'] = intval($title->getNamespace());
 119                                         $vals['title'] = $title->getPrefixedText();
 120                                 }
 121                                 if ($fld_url)
 122                                         $vals['url'] = $row->el_to;
 123                                 $data[] = $vals;
 124                         } else {
 125                                 $resultPageSet->processDbRow($row);
 126                         }
 127                 }
 128                 $db->freeResult($res);
 129
 130                 if (is_null($resultPageSet)) {
 131                         $result = $this->getResult();
 132                         $result->setIndexedTagName($data, $this->getModulePrefix());
 133                         $result->addValue('query', $this->getModuleName(), $data);
 134                 }
 135         }
 136
 137         protected function getAllowedParams() {
 138                 global $wgUrlProtocols;
 139                 $protocols = array();
 140                 foreach ($wgUrlProtocols as $p) {
 141                         $protocols[] = substr($p, 0, strpos($p,':'));
 142                 }
 143
 144                 return array (
 145                         'prop' => array (
 146                                 ApiBase :: PARAM_ISMULTI => true,
 147                                 ApiBase :: PARAM_DFLT => 'ids|title|url',
 148                                 ApiBase :: PARAM_TYPE => array (
 149                                         'ids',
 150                                         'title',
 151                                         'url'
 152                                 )
 153                         ),
 154                         'offset' => array (
 155                                 ApiBase :: PARAM_TYPE => 'integer'
 156                         ),
 157                         'protocol' => array (
 158                                 ApiBase :: PARAM_TYPE => $protocols,
 159                                 ApiBase :: PARAM_DFLT => 'http',
 160                         ),
 161                         'query' => null,
 162                         'namespace' => array (
 163                                 ApiBase :: PARAM_ISMULTI => true,
 164                                 ApiBase :: PARAM_TYPE => 'namespace'
 165                         ),
 166                         'limit' => array (
 167                                 ApiBase :: PARAM_DFLT => 10,
 168                                 ApiBase :: PARAM_TYPE => 'limit',
 169                                 ApiBase :: PARAM_MIN => 1,
 170                                 ApiBase :: PARAM_MAX => ApiBase :: LIMIT_BIG1,
 171                                 ApiBase :: PARAM_MAX2 => ApiBase :: LIMIT_BIG2
 172                         )
 173                 );
 174         }
 175
 176         protected function getParamDescription() {
 177                 return array (
 178                         'prop' => 'What pieces of information to include',
 179                         'offset' => 'Used for paging. Use the value returned for "continue"',
 180                         'protocol' => 'Protocol of the url',
 181                         'query' => 'Search string without protocol. See [[Special:LinkSearch]]',
 182                         'namespace' => 'The page namespace(s) to enumerate.',
 183                         'limit' => 'How many entries to return.'
 184                 );
 185         }
 186
 187         protected function getDescription() {
 188                 return 'Enumerate pages that contain a given URL';
 189         }
 190
 191         protected function getExamples() {
 192                 return array (
 193                         'api.php?action=query&list=exturlusage&euquery=www.mediawiki.org'
 194                 );
 195         }
 196
 197         public function getVersion() {
 198                 return __CLASS__ . ': $Id$';
 199         }
 200 }