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()->strencode( $this->titleToKey( $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', 'wl_namespace' . $sort . ', wl_title' . $sort );
  94                 }
  95                 $this->addOption( 'LIMIT', $params['limit'] + 1 );
  96                 $res = $this->select( __METHOD__ );
  97
  98                 $titles = array();
  99                 $count = 0;
 100                 foreach ( $res as $row ) {
 101                         if ( ++$count > $params['limit'] ) {
 102                                 // We've reached the one extra which shows that there are additional pages to be had. Stop here...
 103                                 $this->setContinueEnumParameter( 'continue', $row->wl_namespace . '|' .
 104                                                                         $this->keyToTitle( $row->wl_title ) );
 105                                 break;
 106                         }
 107                         $t = Title::makeTitle( $row->wl_namespace, $row->wl_title );
 108
 109                         if ( is_null( $resultPageSet ) ) {
 110                                 $vals = array();
 111                                 ApiQueryBase::addTitleInfo( $vals, $t );
 112                                 if ( isset( $prop['changed'] ) && !is_null( $row->wl_notificationtimestamp ) )
 113                                 {
 114                                         $vals['changed'] = wfTimestamp( TS_ISO_8601, $row->wl_notificationtimestamp );
 115                                 }
 116                                 $fit = $this->getResult()->addValue( $this->getModuleName(), null, $vals );
 117                                 if ( !$fit ) {
 118                                         $this->setContinueEnumParameter( 'continue', $row->wl_namespace . '|' .
 119                                                                         $this->keyToTitle( $row->wl_title ) );
 120                                         break;
 121                                 }
 122                         } else {
 123                                 $titles[] = $t;
 124                         }
 125                 }
 126                 if ( is_null( $resultPageSet ) ) {
 127                         $this->getResult()->setIndexedTagName_internal( $this->getModuleName(), 'wr' );
 128                 } else {
 129                         $resultPageSet->populateFromTitles( $titles );
 130                 }
 131         }
 132
 133         public function getAllowedParams() {
 134                 return array(
 135                         'continue' => null,
 136                         'namespace' => array(
 137                                 ApiBase::PARAM_ISMULTI => true,
 138                                 ApiBase::PARAM_TYPE => 'namespace'
 139                         ),
 140                         'limit' => array(
 141                                 ApiBase::PARAM_DFLT => 10,
 142                                 ApiBase::PARAM_TYPE => 'limit',
 143                                 ApiBase::PARAM_MIN => 1,
 144                                 ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
 145                                 ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
 146                         ),
 147                         'prop' => array(
 148                                 ApiBase::PARAM_ISMULTI => true,
 149                                 ApiBase::PARAM_TYPE => array(
 150                                         'changed',
 151                                 )
 152                         ),
 153                         'show' => array(
 154                                 ApiBase::PARAM_ISMULTI => true,
 155                                 ApiBase::PARAM_TYPE => array(
 156                                         'changed',
 157                                         '!changed',
 158                                 )
 159                         ),
 160                         'owner' => array(
 161                                 ApiBase::PARAM_TYPE => 'user'
 162                         ),
 163                         'token' => array(
 164                                 ApiBase::PARAM_TYPE => 'string'
 165                         ),
 166                         'dir' => array(
 167                                 ApiBase::PARAM_DFLT => 'ascending',
 168                                 ApiBase::PARAM_TYPE => array(
 169                                         'ascending',
 170                                         'descending'
 171                                 ),
 172                         ),
 173                 );
 174         }
 175
 176         public function getParamDescription() {
 177                 return array(
 178                         'continue' => 'When more results are available, use this to continue',
 179                         'namespace' => 'Only list pages in the given namespace(s)',
 180                         'limit' => 'How many total results to return per request',
 181                         'prop' => array(
 182                                 'Which additional properties to get (non-generator mode only)',
 183                                 ' changed  - Adds timestamp of when the user was last notified about the edit',
 184                         ),
 185                         'show' => 'Only list items that meet these criteria',
 186                         'owner' => 'The name of the user whose watchlist you\'d like to access',
 187                         'token' => 'Give a security token (settable in preferences) to allow access to another user\'s watchlist',
 188                         'dir' => 'Direction to sort the titles and namespaces in',
 189                 );
 190         }
 191
 192         public function getDescription() {
 193                 return "Get all pages on the logged in user's watchlist";
 194         }
 195
 196         public function getPossibleErrors() {
 197                 return array_merge( parent::getPossibleErrors(), array(
 198                         array( 'code' => 'notloggedin', 'info' => 'You must be logged-in to have a watchlist' ),
 199                         array( 'show' ),
 200                         array( 'code' => 'bad_wlowner', 'info' => 'Specified user does not exist' ),
 201                         array( 'code' => 'bad_wltoken', 'info' => 'Incorrect watchlist token provided -- please set a correct token in Special:Preferences' ),
 202                 ) );
 203         }
 204
 205         public function getExamples() {
 206                 return array(
 207                         'api.php?action=query&list=watchlistraw',
 208                         'api.php?action=query&generator=watchlistraw&gwrshow=changed&prop=revisions',
 209                 );
 210         }
 211
 212         public function getVersion() {
 213                 return __CLASS__ . ': $Id$';
 214         }
 215 }