includes/api/ApiQueryExtLinksUsage.php

   1 <?php
   2
   3 /**
   4  * Created on July 7, 2007
   5  *
   6  * API for MediaWiki 1.8+
   7  *
   8  * Copyright © 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  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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  * @ingroup 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 getCacheMode( $params ) {
  45                 return 'public';
  46         }
  47
  48         public function executeGenerator( $resultPageSet ) {
  49                 $this->run( $resultPageSet );
  50         }
  51
  52         private function run( $resultPageSet = null ) {
  53                 $params = $this->extractRequestParams();
  54
  55                 $protocol = $params['protocol'];
  56                 $query = $params['query'];
  57
  58                 // Find the right prefix
  59                 global $wgUrlProtocols;
  60                 if ( $protocol && !in_array( $protocol, $wgUrlProtocols ) ) {
  61                         foreach ( $wgUrlProtocols as $p ) {
  62                                 if ( substr( $p, 0, strlen( $protocol ) ) === $protocol ) {
  63                                         $protocol = $p;
  64                                         break;
  65                                 }
  66                         }
  67                 } else {
  68                         $protocol = null;
  69                 }
  70
  71                 $db = $this->getDB();
  72                 $this->addTables( array( 'page', 'externallinks' ) );   // must be in this order for 'USE INDEX'
  73                 $this->addOption( 'USE INDEX', 'el_index' );
  74                 $this->addWhere( 'page_id=el_from' );
  75                 $this->addWhereFld( 'page_namespace', $params['namespace'] );
  76
  77                 if ( !is_null( $query ) || $query != '' ) {
  78                         if ( is_null( $protocol ) ) {
  79                                 $protocol = 'http://';
  80                         }
  81
  82                         $likeQuery = LinkFilter::makeLikeArray( $query, $protocol );
  83                         if ( !$likeQuery ) {
  84                                 $this->dieUsage( 'Invalid query', 'bad_query' );
  85                         }
  86
  87                         $likeQuery = LinkFilter::keepOneWildcard( $likeQuery );
  88                         $this->addWhere( 'el_index ' . $db->buildLike( $likeQuery ) );
  89                 } elseif ( !is_null( $protocol ) ) {
  90                         $this->addWhere( 'el_index ' . $db->buildLike( "$protocol", $db->anyString() ) );
  91                 }
  92
  93                 $prop = array_flip( $params['prop'] );
  94                 $fld_ids = isset( $prop['ids'] );
  95                 $fld_title = isset( $prop['title'] );
  96                 $fld_url = isset( $prop['url'] );
  97
  98                 if ( is_null( $resultPageSet ) ) {
  99                         $this->addFields( array(
 100                                 'page_id',
 101                                 'page_namespace',
 102                                 'page_title'
 103                         ) );
 104                         $this->addFieldsIf( 'el_to', $fld_url );
 105                 } else {
 106                         $this->addFields( $resultPageSet->getPageTableFields() );
 107                 }
 108
 109                 $limit = $params['limit'];
 110                 $offset = $params['offset'];
 111                 $this->addOption( 'LIMIT', $limit + 1 );
 112                 if ( isset( $offset ) ) {
 113                         $this->addOption( 'OFFSET', $offset );
 114                 }
 115
 116                 $res = $this->select( __METHOD__ );
 117
 118                 $result = $this->getResult();
 119                 $count = 0;
 120                 foreach ( $res as $row ) {
 121                         if ( ++ $count > $limit ) {
 122                                 // We've reached the one extra which shows that there are additional pages to be had. Stop here...
 123                                 $this->setContinueEnumParameter( 'offset', $offset + $limit );
 124                                 break;
 125                         }
 126
 127                         if ( is_null( $resultPageSet ) ) {
 128                                 $vals = array();
 129                                 if ( $fld_ids ) {
 130                                         $vals['pageid'] = intval( $row->page_id );
 131                                 }
 132                                 if ( $fld_title ) {
 133                                         $title = Title::makeTitle( $row->page_namespace, $row->page_title );
 134                                         ApiQueryBase::addTitleInfo( $vals, $title );
 135                                 }
 136                                 if ( $fld_url ) {
 137                                         $vals['url'] = $row->el_to;
 138                                 }
 139                                 $fit = $result->addValue( array( 'query', $this->getModuleName() ), null, $vals );
 140                                 if ( !$fit ) {
 141                                         $this->setContinueEnumParameter( 'offset', $offset + $count - 1 );
 142                                         break;
 143                                 }
 144                         } else {
 145                                 $resultPageSet->processDbRow( $row );
 146                         }
 147                 }
 148
 149                 if ( is_null( $resultPageSet ) ) {
 150                         $result->setIndexedTagName_internal( array( 'query', $this->getModuleName() ),
 151                                         $this->getModulePrefix() );
 152                 }
 153         }
 154
 155         public function getAllowedParams() {
 156                 global $wgUrlProtocols;
 157                 $protocols = array( '' );
 158                 foreach ( $wgUrlProtocols as $p ) {
 159                         $protocols[] = substr( $p, 0, strpos( $p, ':' ) );
 160                 }
 161
 162                 return array(
 163                         'prop' => array(
 164                                 ApiBase::PARAM_ISMULTI => true,
 165                                 ApiBase::PARAM_DFLT => 'ids|title|url',
 166                                 ApiBase::PARAM_TYPE => array(
 167                                         'ids',
 168                                         'title',
 169                                         'url'
 170                                 )
 171                         ),
 172                         'offset' => array(
 173                                 ApiBase::PARAM_TYPE => 'integer'
 174                         ),
 175                         'protocol' => array(
 176                                 ApiBase::PARAM_TYPE => $protocols,
 177                                 ApiBase::PARAM_DFLT => '',
 178                         ),
 179                         'query' => null,
 180                         'namespace' => array(
 181                                 ApiBase::PARAM_ISMULTI => true,
 182                                 ApiBase::PARAM_TYPE => 'namespace'
 183                         ),
 184                         'limit' => array(
 185                                 ApiBase::PARAM_DFLT => 10,
 186                                 ApiBase::PARAM_TYPE => 'limit',
 187                                 ApiBase::PARAM_MIN => 1,
 188                                 ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
 189                                 ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
 190                         )
 191                 );
 192         }
 193
 194         public function getParamDescription() {
 195                 $p = $this->getModulePrefix();
 196                 return array(
 197                         'prop' => array(
 198                                 'What pieces of information to include',
 199                                 ' ids    - Adds the id of page',
 200                                 ' title  - Adds the title and namespace id of the page',
 201                                 ' url    - Adds the URL used in the page',
 202                         ),
 203                         'offset' => 'Used for paging. Use the value returned for "continue"',
 204                         'protocol' => array(
 205                                 "Protocol of the url. If empty and {$p}query set, the protocol is http.",
 206                                 "Leave both this and {$p}query empty to list all external links"
 207                         ),
 208                         'query' => 'Search string without protocol. See [[Special:LinkSearch]]. Leave empty to list all external links',
 209                         'namespace' => 'The page namespace(s) to enumerate.',
 210                         'limit' => 'How many pages to return.'
 211                 );
 212         }
 213
 214         public function getDescription() {
 215                 return 'Enumerate pages that contain a given URL';
 216         }
 217
 218         public function getPossibleErrors() {
 219                 return array_merge( parent::getPossibleErrors(), array(
 220                         array( 'code' => 'bad_query', 'info' => 'Invalid query' ),
 221                 ) );
 222         }
 223
 224         protected function getExamples() {
 225                 return array(
 226                         'api.php?action=query&list=exturlusage&euquery=www.mediawiki.org'
 227                 );
 228         }
 229
 230         public function getVersion() {
 231                 return __CLASS__ . ': $Id$';
 232         }
 233 }