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                 $continuationManager = new ApiContinuationManager( $this, array(), array() );
  48                 $this->setContinuationManager( $continuationManager );
  49
  50                 $pageSet = $this->getPageSet();
  51                 // by default we use pageset to extract the page to work on.
  52                 // title is still supported for backward compatibility
  53                 if ( !isset( $params['title'] ) ) {
  54                         $pageSet->execute();
  55                         $res = $pageSet->getInvalidTitlesAndRevisions( array(
  56                                 'invalidTitles',
  57                                 'special',
  58                                 'missingIds',
  59                                 'missingRevIds',
  60                                 'interwikiTitles'
  61                         ) );
  62
  63                         foreach ( $pageSet->getMissingTitles() as $title ) {
  64                                 $r = $this->watchTitle( $title, $user, $params );
  65                                 $r['missing'] = 1;
  66                                 $res[] = $r;
  67                         }
  68
  69                         foreach ( $pageSet->getGoodTitles() as $title ) {
  70                                 $r = $this->watchTitle( $title, $user, $params );
  71                                 $res[] = $r;
  72                         }
  73                         ApiResult::setIndexedTagName( $res, 'w' );
  74                 } else {
  75                         // dont allow use of old title parameter with new pageset parameters.
  76                         $extraParams = array_keys( array_filter( $pageSet->extractRequestParams(), function ( $x ) {
  77                                 return $x !== null && $x !== false;
  78                         } ) );
  79
  80                         if ( $extraParams ) {
  81                                 $p = $this->getModulePrefix();
  82                                 $this->dieUsage(
  83                                         "The parameter {$p}title can not be used with " . implode( ", ", $extraParams ),
  84                                         'invalidparammix'
  85                                 );
  86                         }
  87
  88                         $this->logFeatureUsage( 'action=watch&title' );
  89                         $title = Title::newFromText( $params['title'] );
  90                         if ( !$title || !$title->isWatchable() ) {
  91                                 $this->dieUsageMsg( array( 'invalidtitle', $params['title'] ) );
  92                         }
  93                         $res = $this->watchTitle( $title, $user, $params, true );
  94                 }
  95                 $this->getResult()->addValue( null, $this->getModuleName(), $res );
  96
  97                 $this->setContinuationManager( null );
  98                 $continuationManager->setContinuationIntoResult( $this->getResult() );
  99         }
 100
 101         private function watchTitle( Title $title, User $user, array $params,
 102                 $compatibilityMode = false
 103         ) {
 104                 if ( !$title->isWatchable() ) {
 105                         return array( 'title' => $title->getPrefixedText(), 'watchable' => 0 );
 106                 }
 107
 108                 $res = array( 'title' => $title->getPrefixedText() );
 109
 110                 if ( $params['unwatch'] ) {
 111                         $status = UnwatchAction::doUnwatch( $title, $user );
 112                         $res['unwatched'] = $status->isOK();
 113                         if ( $status->isOK() ) {
 114                                 $res['message'] = $this->msg( 'removedwatchtext', $title->getPrefixedText() )
 115                                         ->title( $title )->parseAsBlock();
 116                         }
 117                 } else {
 118                         $status = WatchAction::doWatch( $title, $user );
 119                         $res['watched'] = $status->isOK();
 120                         if ( $status->isOK() ) {
 121                                 $res['message'] = $this->msg( 'addedwatchtext', $title->getPrefixedText() )
 122                                         ->title( $title )->parseAsBlock();
 123                         }
 124                 }
 125
 126                 if ( !$status->isOK() ) {
 127                         if ( $compatibilityMode ) {
 128                                 $this->dieStatus( $status );
 129                         }
 130                         $res['error'] = $this->getErrorFromStatus( $status );
 131                 }
 132
 133                 return $res;
 134         }
 135
 136         /**
 137          * Get a cached instance of an ApiPageSet object
 138          * @return ApiPageSet
 139          */
 140         private function getPageSet() {
 141                 if ( $this->mPageSet === null ) {
 142                         $this->mPageSet = new ApiPageSet( $this );
 143                 }
 144
 145                 return $this->mPageSet;
 146         }
 147
 148         public function mustBePosted() {
 149                 return true;
 150         }
 151
 152         public function isWriteMode() {
 153                 return true;
 154         }
 155
 156         public function needsToken() {
 157                 return 'watch';
 158         }
 159
 160         public function getAllowedParams( $flags = 0 ) {
 161                 $result = array(
 162                         'title' => array(
 163                                 ApiBase::PARAM_TYPE => 'string',
 164                                 ApiBase::PARAM_DEPRECATED => true
 165                         ),
 166                         'unwatch' => false,
 167                         'continue' => array(
 168                                 ApiBase::PARAM_HELP_MSG => 'api-help-param-continue',
 169                         ),
 170                 );
 171                 if ( $flags ) {
 172                         $result += $this->getPageSet()->getFinalParams( $flags );
 173                 }
 174
 175                 return $result;
 176         }
 177
 178         protected function getExamplesMessages() {
 179                 return array(
 180                         'action=watch&titles=Main_Page&token=123ABC'
 181                                 => 'apihelp-watch-example-watch',
 182                         'action=watch&titles=Main_Page&unwatch=&token=123ABC'
 183                                 => 'apihelp-watch-example-unwatch',
 184                         'action=watch&generator=allpages&gapnamespace=0&token=123ABC'
 185                                 => 'apihelp-watch-example-generator',
 186                 );
 187         }
 188
 189         public function getHelpUrls() {
 190                 return 'https://www.mediawiki.org/wiki/API:Watch';
 191         }
 192 }