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                 if ( $params['unwatch'] ) {
 108                         $status = UnwatchAction::doUnwatch( $title, $user );
 109                         if ( $status->isOK() ) {
 110                                 $res['unwatched'] = '';
 111                                 $res['message'] = $this->msg( 'removedwatchtext', $title->getPrefixedText() )
 112                                         ->title( $title )->parseAsBlock();
 113                         }
 114                 } else {
 115                         $status = WatchAction::doWatch( $title, $user );
 116                         if ( $status->isOK() ) {
 117                                 $res['watched'] = '';
 118                                 $res['message'] = $this->msg( 'addedwatchtext', $title->getPrefixedText() )
 119                                         ->title( $title )->parseAsBlock();
 120                         }
 121                 }
 122
 123                 if ( !$status->isOK() ) {
 124                         if ( $compatibilityMode ) {
 125                                 $this->dieStatus( $status );
 126                         }
 127                         $res['error'] = $this->getErrorFromStatus( $status );
 128                 }
 129
 130                 return $res;
 131         }
 132
 133         /**
 134          * Get a cached instance of an ApiPageSet object
 135          * @return ApiPageSet
 136          */
 137         private function getPageSet() {
 138                 if ( $this->mPageSet === null ) {
 139                         $this->mPageSet = new ApiPageSet( $this );
 140                 }
 141
 142                 return $this->mPageSet;
 143         }
 144
 145         public function mustBePosted() {
 146                 return true;
 147         }
 148
 149         public function isWriteMode() {
 150                 return true;
 151         }
 152
 153         public function needsToken() {
 154                 return 'watch';
 155         }
 156
 157         public function getAllowedParams( $flags = 0 ) {
 158                 $result = array(
 159                         'title' => array(
 160                                 ApiBase::PARAM_TYPE => 'string',
 161                                 ApiBase::PARAM_DEPRECATED => true
 162                         ),
 163                         'unwatch' => false,
 164                         'continue' => array(
 165                                 ApiBase::PARAM_HELP_MSG => 'api-help-param-continue',
 166                         ),
 167                 );
 168                 if ( $flags ) {
 169                         $result += $this->getPageSet()->getFinalParams( $flags );
 170                 }
 171
 172                 return $result;
 173         }
 174
 175         public function getExamplesMessages() {
 176                 return array(
 177                         'action=watch&titles=Main_Page&token=123ABC'
 178                                 => 'apihelp-watch-example-watch',
 179                         'action=watch&titles=Main_Page&unwatch=&token=123ABC'
 180                                 => 'apihelp-watch-example-unwatch',
 181                         'action=watch&generator=allpages&gapnamespace=0&token=123ABC'
 182                                 => 'apihelp-watch-example-generator',
 183                 );
 184         }
 185
 186         public function getHelpUrls() {
 187                 return 'https://www.mediawiki.org/wiki/API:Watch';
 188         }
 189 }