includes/api/ApiQueryWatchlistRaw.php

   1 <?php
   2
   3 /*
   4  * Created on Oct 4, 2008
   5  *
   6  * API for MediaWiki 1.8+
   7  *
   8  * Copyright (C) 2008 Roan Kattouw <Firstname>.<Lastname>@home.nl
   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  * This query action allows clients to retrieve a list of pages
  33  * on the logged-in user's watchlist.
  34  *
  35  * @ingroup API
  36  */
  37 class ApiQueryWatchlistRaw extends ApiQueryGeneratorBase {
  38
  39         public function __construct( $query, $moduleName ) {
  40                 parent :: __construct( $query, $moduleName, 'wr' );
  41         }
  42
  43         public function execute() {
  44                 $this->run();
  45         }
  46
  47         public function executeGenerator( $resultPageSet ) {
  48                 $this->run( $resultPageSet );
  49         }
  50
  51         private function run( $resultPageSet = null ) {
  52                 global $wgUser;
  53
  54                 $this->selectNamedDB( 'watchlist', DB_SLAVE, 'watchlist' );
  55
  56                 if ( !$wgUser->isLoggedIn() )
  57                         $this->dieUsage( 'You must be logged-in to have a watchlist', 'notloggedin' );
  58                 $params = $this->extractRequestParams();
  59                 $prop = array_flip( (array)$params['prop'] );
  60                 $show = array_flip( (array)$params['show'] );
  61                 if ( isset( $show['changed'] ) && isset( $show['!changed'] ) )
  62                         $this->dieUsage( "Incorrect parameter - mutually exclusive values may not be supplied", 'show' );
  63
  64                 $this->addTables( 'watchlist' );
  65                 $this->addFields( array( 'wl_namespace', 'wl_title' ) );
  66                 $this->addFieldsIf( 'wl_notificationtimestamp', isset( $prop['changed'] ) );
  67                 $this->addWhereFld( 'wl_user', $wgUser->getId() );
  68                 $this->addWhereFld( 'wl_namespace', $params['namespace'] );
  69                 $this->addWhereIf( 'wl_notificationtimestamp IS NOT NULL', isset( $show['changed'] ) );
  70                 $this->addWhereIf( 'wl_notificationtimestamp IS NULL', isset( $show['!changed'] ) );
  71                 if ( isset( $params['continue'] ) )
  72                 {
  73                         $cont = explode( '|', $params['continue'] );
  74                         if ( count( $cont ) != 2 )
  75                                 $this->dieUsage( "Invalid continue param. You should pass the " .
  76                                         "original value returned by the previous query", "_badcontinue" );
  77                         $ns = intval( $cont[0] );
  78                         $title = $this->getDB()->strencode( $this->titleToKey( $cont[1] ) );
  79                         $this->addWhere( "wl_namespace > '$ns' OR " .
  80                                         "(wl_namespace = '$ns' AND " .
  81                                         "wl_title >= '$title')" );
  82                 }
  83                 // Don't ORDER BY wl_namespace if it's constant in the WHERE clause
  84                 if ( count( $params['namespace'] ) == 1 )
  85                         $this->addOption( 'ORDER BY', 'wl_title' );
  86                 else
  87                         $this->addOption( 'ORDER BY', 'wl_namespace, wl_title' );
  88                 $this->addOption( 'LIMIT', $params['limit'] + 1 );
  89                 $res = $this->select( __METHOD__ );
  90
  91                 $db = $this->getDB();
  92                 $titles = array();
  93                 $count = 0;
  94                 while ( $row = $db->fetchObject( $res ) )
  95                 {
  96                         if ( ++$count > $params['limit'] )
  97                         {
  98                                 // We've reached the one extra which shows that there are additional pages to be had. Stop here...
  99                                 $this->setContinueEnumParameter( 'continue', $row->wl_namespace . '|' .
 100                                                                         $this->keyToTitle( $row->wl_title ) );
 101                                 break;
 102                         }
 103                         $t = Title::makeTitle( $row->wl_namespace, $row->wl_title );
 104                         if ( is_null( $resultPageSet ) )
 105                         {
 106                                 $vals = array();
 107                                 ApiQueryBase::addTitleInfo( $vals, $t );
 108                                 if ( isset( $prop['changed'] ) && !is_null( $row->wl_notificationtimestamp ) )
 109                                         $vals['changed'] = wfTimestamp( TS_ISO_8601, $row->wl_notificationtimestamp );
 110                                 $fit = $this->getResult()->addValue( $this->getModuleName(), null, $vals );
 111                                 if ( !$fit )
 112                                 {
 113                                         $this->setContinueEnumParameter( 'continue', $row->wl_namespace . '|' .
 114                                                                         $this->keyToTitle( $row->wl_title ) );
 115                                         break;
 116                                 }
 117                         }
 118                         else
 119                                 $titles[] = $t;
 120                 }
 121                 if ( is_null( $resultPageSet ) )
 122                         $this->getResult()->setIndexedTagName_internal( $this->getModuleName(), 'wr' );
 123                 else
 124                         $resultPageSet->populateFromTitles( $titles );
 125         }
 126
 127         public function getAllowedParams() {
 128                 return array (
 129                         'continue' => null,
 130                         'namespace' => array (
 131                                 ApiBase :: PARAM_ISMULTI => true,
 132                                 ApiBase :: PARAM_TYPE => 'namespace'
 133                         ),
 134                         'limit' => array (
 135                                 ApiBase :: PARAM_DFLT => 10,
 136                                 ApiBase :: PARAM_TYPE => 'limit',
 137                                 ApiBase :: PARAM_MIN => 1,
 138                                 ApiBase :: PARAM_MAX => ApiBase :: LIMIT_BIG1,
 139                                 ApiBase :: PARAM_MAX2 => ApiBase :: LIMIT_BIG2
 140                         ),
 141                         'prop' => array (
 142                                 ApiBase :: PARAM_ISMULTI => true,
 143                                 ApiBase :: PARAM_TYPE => array (
 144                                         'changed',
 145                                 )
 146                         ),
 147                         'show' => array (
 148                                 ApiBase :: PARAM_ISMULTI => true,
 149                                 ApiBase :: PARAM_TYPE => array (
 150                                         'changed',
 151                                         '!changed',
 152                                 )
 153                         )
 154                 );
 155         }
 156
 157         public function getParamDescription() {
 158                 return array (
 159                         'continue' => 'When more results are available, use this to continue',
 160                         'namespace' => 'Only list pages in the given namespace(s).',
 161                         'limit' => 'How many total results to return per request.',
 162                         'prop' => 'Which additional properties to get (non-generator mode only).',
 163                         'show' => 'Only list items that meet these criteria.',
 164                 );
 165         }
 166
 167         public function getDescription() {
 168                 return "Get all pages on the logged in user's watchlist";
 169         }
 170
 171         protected function getExamples() {
 172                 return array (
 173                         'api.php?action=query&list=watchlistraw',
 174                         'api.php?action=query&generator=watchlistraw&gwrshow=changed&prop=revisions',
 175                 );
 176         }
 177
 178         public function getVersion() {
 179                 return __CLASS__ . ': $Id$';
 180         }
 181 }