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->dieWithError( 'watchlistanontext', 'notloggedin' );
  39                 }
  40
  41                 $this->checkUserRightsAny( 'editmywatchlist' );
  42
  43                 $params = $this->extractRequestParams();
  44
  45                 $continuationManager = new ApiContinuationManager( $this, [], [] );
  46                 $this->setContinuationManager( $continuationManager );
  47
  48                 $pageSet = $this->getPageSet();
  49                 // by default we use pageset to extract the page to work on.
  50                 // title is still supported for backward compatibility
  51                 if ( !isset( $params['title'] ) ) {
  52                         $pageSet->execute();
  53                         $res = $pageSet->getInvalidTitlesAndRevisions( [
  54                                 'invalidTitles',
  55                                 'special',
  56                                 'missingIds',
  57                                 'missingRevIds',
  58                                 'interwikiTitles'
  59                         ] );
  60
  61                         foreach ( $pageSet->getMissingTitles() as $title ) {
  62                                 $r = $this->watchTitle( $title, $user, $params );
  63                                 $r['missing'] = true;
  64                                 $res[] = $r;
  65                         }
  66
  67                         foreach ( $pageSet->getGoodTitles() as $title ) {
  68                                 $r = $this->watchTitle( $title, $user, $params );
  69                                 $res[] = $r;
  70                         }
  71                         ApiResult::setIndexedTagName( $res, 'w' );
  72                 } else {
  73                         // dont allow use of old title parameter with new pageset parameters.
  74                         $extraParams = array_keys( array_filter( $pageSet->extractRequestParams(), function ( $x ) {
  75                                 return $x !== null && $x !== false;
  76                         } ) );
  77
  78                         if ( $extraParams ) {
  79                                 $this->dieWithError(
  80                                         [
  81                                                 'apierror-invalidparammix-cannotusewith',
  82                                                 $this->encodeParamName( 'title' ),
  83                                                 $pageSet->encodeParamName( $extraParams[0] )
  84                                         ],
  85                                         'invalidparammix'
  86                                 );
  87                         }
  88
  89                         $title = Title::newFromText( $params['title'] );
  90                         if ( !$title || !$title->isWatchable() ) {
  91                                 $this->dieWithError( [ '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 [ 'title' => $title->getPrefixedText(), 'watchable' => 0 ];
 106                 }
 107
 108                 $res = [ 'title' => $title->getPrefixedText() ];
 109
 110                 if ( $params['unwatch'] ) {
 111                         $status = UnwatchAction::doUnwatch( $title, $user );
 112                         $res['unwatched'] = $status->isOK();
 113                 } else {
 114                         $status = WatchAction::doWatch( $title, $user );
 115                         $res['watched'] = $status->isOK();
 116                 }
 117
 118                 if ( !$status->isOK() ) {
 119                         if ( $compatibilityMode ) {
 120                                 $this->dieStatus( $status );
 121                         }
 122                         $res['errors'] = $this->getErrorFormatter()->arrayFromStatus( $status, 'error' );
 123                         $res['warnings'] = $this->getErrorFormatter()->arrayFromStatus( $status, 'warning' );
 124                         if ( !$res['warnings'] ) {
 125                                 unset( $res['warnings'] );
 126                         }
 127                 }
 128
 129                 return $res;
 130         }
 131
 132         /**
 133          * Get a cached instance of an ApiPageSet object
 134          * @return ApiPageSet
 135          */
 136         private function getPageSet() {
 137                 if ( $this->mPageSet === null ) {
 138                         $this->mPageSet = new ApiPageSet( $this );
 139                 }
 140
 141                 return $this->mPageSet;
 142         }
 143
 144         public function mustBePosted() {
 145                 return true;
 146         }
 147
 148         public function isWriteMode() {
 149                 return true;
 150         }
 151
 152         public function needsToken() {
 153                 return 'watch';
 154         }
 155
 156         public function getAllowedParams( $flags = 0 ) {
 157                 $result = [
 158                         'title' => [
 159                                 ApiBase::PARAM_TYPE => 'string',
 160                                 ApiBase::PARAM_DEPRECATED => true
 161                         ],
 162                         'unwatch' => false,
 163                         'continue' => [
 164                                 ApiBase::PARAM_HELP_MSG => 'api-help-param-continue',
 165                         ],
 166                 ];
 167                 if ( $flags ) {
 168                         $result += $this->getPageSet()->getFinalParams( $flags );
 169                 }
 170
 171                 return $result;
 172         }
 173
 174         protected function getExamplesMessages() {
 175                 return [
 176                         'action=watch&titles=Main_Page&token=123ABC'
 177                                 => 'apihelp-watch-example-watch',
 178                         'action=watch&titles=Main_Page&unwatch=&token=123ABC'
 179                                 => 'apihelp-watch-example-unwatch',
 180                         'action=watch&generator=allpages&gapnamespace=0&token=123ABC'
 181                                 => 'apihelp-watch-example-generator',
 182                 ];
 183         }
 184
 185         public function getHelpUrls() {
 186                 return 'https://www.mediawiki.org/wiki/Special:MyLanguage/API:Watch';
 187         }
 188 }