includes/api/ApiWatch.php

   1 <?php
   2 /**
   3  *
   4  *
   5  * Created on Jan 4, 2008
   6  *
   7  * Copyright © 2008 Yuri Astrakhan "<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  * API module to allow users to watch a page
  29  *
  30  * @ingroup API
  31  */
  32 class ApiWatch extends ApiBase {
  33         private $mPageSet = null;
  34
  35         public function execute() {
  36                 $user = $this->getUser();
  37                 if ( !$user->isLoggedIn() ) {
  38                         $this->dieUsage( 'You must be logged-in to have a watchlist', 'notloggedin' );
  39                 }
  40
  41                 if ( !$user->isAllowed( 'editmywatchlist' ) ) {
  42                         $this->dieUsage( 'You don\'t have permission to edit your watchlist', 'permissiondenied' );
  43                 }
  44
  45                 $params = $this->extractRequestParams();
  46
  47                 $this->getResult()->beginContinuation( $params['continue'], array(), array() );
  48
  49                 $pageSet = $this->getPageSet();
  50                 // by default we use pageset to extract the page to work on.
  51                 // title is still supported for backward compatibility
  52                 if ( !isset( $params['title'] ) ) {
  53                         $pageSet->execute();
  54                         $res = $pageSet->getInvalidTitlesAndRevisions( array(
  55                                 'invalidTitles',
  56                                 'special',
  57                                 'missingIds',
  58                                 'missingRevIds',
  59                                 'interwikiTitles'
  60                         ) );
  61
  62                         foreach ( $pageSet->getMissingTitles() as $title ) {
  63                                 $r = $this->watchTitle( $title, $user, $params );
  64                                 $r['missing'] = 1;
  65                                 $res[] = $r;
  66                         }
  67
  68                         foreach ( $pageSet->getGoodTitles() as $title ) {
  69                                 $r = $this->watchTitle( $title, $user, $params );
  70                                 $res[] = $r;
  71                         }
  72                         $this->getResult()->setIndexedTagName( $res, 'w' );
  73                 } else {
  74                         // dont allow use of old title parameter with new pageset parameters.
  75                         $extraParams = array_keys( array_filter( $pageSet->extractRequestParams(), function ( $x ) {
  76                                 return $x !== null && $x !== false;
  77                         } ) );
  78
  79                         if ( $extraParams ) {
  80                                 $p = $this->getModulePrefix();
  81                                 $this->dieUsage(
  82                                         "The parameter {$p}title can not be used with " . implode( ", ", $extraParams ),
  83                                         'invalidparammix'
  84                                 );
  85                         }
  86
  87                         $this->logFeatureUsage( 'action=watch&title' );
  88                         $title = Title::newFromText( $params['title'] );
  89                         if ( !$title || !$title->isWatchable() ) {
  90                                 $this->dieUsageMsg( array( 'invalidtitle', $params['title'] ) );
  91                         }
  92                         $res = $this->watchTitle( $title, $user, $params, true );
  93                 }
  94                 $this->getResult()->addValue( null, $this->getModuleName(), $res );
  95                 $this->getResult()->endContinuation();
  96         }
  97
  98         private function watchTitle( Title $title, User $user, array $params,
  99                 $compatibilityMode = false
 100         ) {
 101                 if ( !$title->isWatchable() ) {
 102                         return array( 'title' => $title->getPrefixedText(), 'watchable' => 0 );
 103                 }
 104
 105                 $res = array( 'title' => $title->getPrefixedText() );
 106
 107                 // Currently unnecessary, code to act as a safeguard against any change
 108                 // in current behavior of uselang.
 109                 // Copy from ApiParse
 110                 $oldLang = null;
 111                 if ( isset( $params['uselang'] ) &&
 112                         $params['uselang'] != $this->getContext()->getLanguage()->getCode()
 113                 ) {
 114                         $oldLang = $this->getContext()->getLanguage(); // Backup language
 115                         $this->getContext()->setLanguage( Language::factory( $params['uselang'] ) );
 116                 }
 117
 118                 if ( $params['unwatch'] ) {
 119                         $status = UnwatchAction::doUnwatch( $title, $user );
 120                         if ( $status->isOK() ) {
 121                                 $res['unwatched'] = '';
 122                                 $res['message'] = $this->msg( 'removedwatchtext', $title->getPrefixedText() )
 123                                         ->title( $title )->parseAsBlock();
 124                         }
 125                 } else {
 126                         $status = WatchAction::doWatch( $title, $user );
 127                         if ( $status->isOK() ) {
 128                                 $res['watched'] = '';
 129                                 $res['message'] = $this->msg( 'addedwatchtext', $title->getPrefixedText() )
 130                                         ->title( $title )->parseAsBlock();
 131                         }
 132                 }
 133
 134                 if ( !is_null( $oldLang ) ) {
 135                         $this->getContext()->setLanguage( $oldLang ); // Reset language to $oldLang
 136                 }
 137
 138                 if ( !$status->isOK() ) {
 139                         if ( $compatibilityMode ) {
 140                                 $this->dieStatus( $status );
 141                         }
 142                         $res['error'] = $this->getErrorFromStatus( $status );
 143                 }
 144
 145                 return $res;
 146         }
 147
 148         /**
 149          * Get a cached instance of an ApiPageSet object
 150          * @return ApiPageSet
 151          */
 152         private function getPageSet() {
 153                 if ( $this->mPageSet === null ) {
 154                         $this->mPageSet = new ApiPageSet( $this );
 155                 }
 156
 157                 return $this->mPageSet;
 158         }
 159
 160         public function mustBePosted() {
 161                 return true;
 162         }
 163
 164         public function isWriteMode() {
 165                 return true;
 166         }
 167
 168         public function needsToken() {
 169                 return 'watch';
 170         }
 171
 172         public function getAllowedParams( $flags = 0 ) {
 173                 $result = array(
 174                         'title' => array(
 175                                 ApiBase::PARAM_TYPE => 'string',
 176                                 ApiBase::PARAM_DEPRECATED => true
 177                         ),
 178                         'unwatch' => false,
 179                         'uselang' => null,
 180                         'continue' => '',
 181                 );
 182                 if ( $flags ) {
 183                         $result += $this->getPageSet()->getFinalParams( $flags );
 184                 }
 185
 186                 return $result;
 187         }
 188
 189         public function getParamDescription() {
 190                 $psModule = $this->getPageSet();
 191
 192                 return $psModule->getParamDescription() + array(
 193                         'title' => 'The page to (un)watch. use titles instead',
 194                         'unwatch' => 'If set the page will be unwatched rather than watched',
 195                         'uselang' => 'Language to show the message in',
 196                         'continue' => 'When more results are available, use this to continue',
 197                 );
 198         }
 199
 200         public function getDescription() {
 201                 return 'Add or remove pages from/to the current user\'s watchlist.';
 202         }
 203
 204         public function getExamples() {
 205                 return array(
 206                         'api.php?action=watch&titles=Main_Page' => 'Watch the page "Main Page"',
 207                         'api.php?action=watch&titles=Main_Page&unwatch=' => 'Unwatch the page "Main Page"',
 208                 );
 209         }
 210
 211         public function getHelpUrls() {
 212                 return 'https://www.mediawiki.org/wiki/API:Watch';
 213         }
 214 }