includes/api/ApiQueryWatchlistRaw.php

   1 <?php
   2 /**
   3  *
   4  *
   5  * Created on Oct 4, 2008
   6  *
   7  * Copyright © 2008 Roan Kattouw "<Firstname>.<Lastname>@gmail.com"
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write to the Free Software Foundation, Inc.,
  21  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  22  * http://www.gnu.org/copyleft/gpl.html
  23  *
  24  * @file
  25  */
  26
  27 /**
  28  * This query action allows clients to retrieve a list of pages
  29  * on the logged-in user's watchlist.
  30  *
  31  * @ingroup API
  32  */
  33 class ApiQueryWatchlistRaw extends ApiQueryGeneratorBase {
  34
  35         public function __construct( $query, $moduleName ) {
  36                 parent::__construct( $query, $moduleName, 'wr' );
  37         }
  38
  39         public function execute() {
  40                 $this->run();
  41         }
  42
  43         public function executeGenerator( $resultPageSet ) {
  44                 $this->run( $resultPageSet );
  45         }
  46
  47         /**
  48          * @param $resultPageSet ApiPageSet
  49          * @return void
  50          */
  51         private function run( $resultPageSet = null ) {
  52                 $this->selectNamedDB( 'watchlist', DB_SLAVE, 'watchlist' );
  53
  54                 $params = $this->extractRequestParams();
  55
  56                 $user = $this->getWatchlistUser( $params );
  57
  58                 $prop = array_flip( (array)$params['prop'] );
  59                 $show = array_flip( (array)$params['show'] );
  60                 if ( isset( $show['changed'] ) && isset( $show['!changed'] ) ) {
  61                         $this->dieUsageMsg( 'show' );
  62                 }
  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', $user->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
  72                 if ( isset( $params['continue'] ) ) {
  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                         }
  78                         $ns = intval( $cont[0] );
  79                         $title = $this->getDB()->addQuotes( $cont[1] );
  80                         $op = $params['dir'] == 'ascending' ? '>' : '<';
  81                         $this->addWhere(
  82                                 "wl_namespace $op $ns OR " .
  83                                 "(wl_namespace = $ns AND " .
  84                                 "wl_title $op= $title)"
  85                         );
  86                 }
  87
  88                 $sort = ( $params['dir'] == 'descending' ? ' DESC' : '' );
  89                 // Don't ORDER BY wl_namespace if it's constant in the WHERE clause
  90                 if ( count( $params['namespace'] ) == 1 ) {
  91                         $this->addOption( 'ORDER BY', 'wl_title' . $sort );
  92                 } else {
  93                         $this->addOption( 'ORDER BY', array(
  94                                 'wl_namespace' . $sort,
  95                                 'wl_title' . $sort
  96                         ));
  97                 }
  98                 $this->addOption( 'LIMIT', $params['limit'] + 1 );
  99                 $res = $this->select( __METHOD__ );
 100
 101                 $titles = array();
 102                 $count = 0;
 103                 foreach ( $res as $row ) {
 104                         if ( ++$count > $params['limit'] ) {
 105                                 // We've reached the one extra which shows that there are additional pages to be had. Stop here...
 106                                 $this->setContinueEnumParameter( 'continue', $row->wl_namespace . '|' . $row->wl_title );
 107                                 break;
 108                         }
 109                         $t = Title::makeTitle( $row->wl_namespace, $row->wl_title );
 110
 111                         if ( is_null( $resultPageSet ) ) {
 112                                 $vals = array();
 113                                 ApiQueryBase::addTitleInfo( $vals, $t );
 114                                 if ( isset( $prop['changed'] ) && !is_null( $row->wl_notificationtimestamp ) )
 115                                 {
 116                                         $vals['changed'] = wfTimestamp( TS_ISO_8601, $row->wl_notificationtimestamp );
 117                                 }
 118                                 $fit = $this->getResult()->addValue( $this->getModuleName(), null, $vals );
 119                                 if ( !$fit ) {
 120                                         $this->setContinueEnumParameter( 'continue', $row->wl_namespace . '|' . $row->wl_title );
 121                                         break;
 122                                 }
 123                         } else {
 124                                 $titles[] = $t;
 125                         }
 126                 }
 127                 if ( is_null( $resultPageSet ) ) {
 128                         $this->getResult()->setIndexedTagName_internal( $this->getModuleName(), 'wr' );
 129                 } else {
 130                         $resultPageSet->populateFromTitles( $titles );
 131                 }
 132         }
 133
 134         public function getAllowedParams() {
 135                 return array(
 136                         'continue' => null,
 137                         'namespace' => array(
 138                                 ApiBase::PARAM_ISMULTI => true,
 139                                 ApiBase::PARAM_TYPE => 'namespace'
 140                         ),
 141                         'limit' => array(
 142                                 ApiBase::PARAM_DFLT => 10,
 143                                 ApiBase::PARAM_TYPE => 'limit',
 144                                 ApiBase::PARAM_MIN => 1,
 145                                 ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
 146                                 ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
 147                         ),
 148                         'prop' => array(
 149                                 ApiBase::PARAM_ISMULTI => true,
 150                                 ApiBase::PARAM_TYPE => array(
 151                                         'changed',
 152                                 )
 153                         ),
 154                         'show' => array(
 155                                 ApiBase::PARAM_ISMULTI => true,
 156                                 ApiBase::PARAM_TYPE => array(
 157                                         'changed',
 158                                         '!changed',
 159                                 )
 160                         ),
 161                         'owner' => array(
 162                                 ApiBase::PARAM_TYPE => 'user'
 163                         ),
 164                         'token' => array(
 165                                 ApiBase::PARAM_TYPE => 'string'
 166                         ),
 167                         'dir' => array(
 168                                 ApiBase::PARAM_DFLT => 'ascending',
 169                                 ApiBase::PARAM_TYPE => array(
 170                                         'ascending',
 171                                         'descending'
 172                                 ),
 173                         ),
 174                 );
 175         }
 176
 177         public function getParamDescription() {
 178                 return array(
 179                         'continue' => 'When more results are available, use this to continue',
 180                         'namespace' => 'Only list pages in the given namespace(s)',
 181                         'limit' => 'How many total results to return per request',
 182                         'prop' => array(
 183                                 'Which additional properties to get (non-generator mode only)',
 184                                 ' changed  - Adds timestamp of when the user was last notified about the edit',
 185                         ),
 186                         'show' => 'Only list items that meet these criteria',
 187                         'owner' => 'The name of the user whose watchlist you\'d like to access',
 188                         'token' => 'Give a security token (settable in preferences) to allow access to another user\'s watchlist',
 189                         'dir' => 'Direction to sort the titles and namespaces in',
 190                 );
 191         }
 192
 193         public function getResultProperties() {
 194                 return array(
 195                         '' => array(
 196                                 'ns' => 'namespace',
 197                                 'title' => 'string'
 198                         ),
 199                         'changed' => array(
 200                                 'changed' => array(
 201                                         ApiBase::PROP_TYPE => 'timestamp',
 202                                         ApiBase::PROP_NULLABLE => true
 203                                 )
 204                         )
 205                 );
 206         }
 207
 208         public function getDescription() {
 209                 return "Get all pages on the logged in user's watchlist";
 210         }
 211
 212         public function getPossibleErrors() {
 213                 return array_merge( parent::getPossibleErrors(), array(
 214                         array( 'code' => 'notloggedin', 'info' => 'You must be logged-in to have a watchlist' ),
 215                         array( 'show' ),
 216                         array( 'code' => 'bad_wlowner', 'info' => 'Specified user does not exist' ),
 217                         array( 'code' => 'bad_wltoken', 'info' => 'Incorrect watchlist token provided -- please set a correct token in Special:Preferences' ),
 218                 ) );
 219         }
 220
 221         public function getExamples() {
 222                 return array(
 223                         'api.php?action=query&list=watchlistraw',
 224                         'api.php?action=query&generator=watchlistraw&gwrshow=changed&prop=revisions',
 225                 );
 226         }
 227
 228         public function getVersion() {
 229                 return __CLASS__ . ': $Id$';
 230         }
 231 }