includes/api/ApiFeedWatchlist.php

   1 <?php
   2
   3 /**
   4  * Created on Oct 13, 2006
   5  *
   6  * API for MediaWiki 1.8+
   7  *
   8  * Copyright © 2006 Yuri Astrakhan <Firstname><Lastname>@gmail.com
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License along
  21  * with this program; if not, write to the Free Software Foundation, Inc.,
  22  * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  23  * http://www.gnu.org/copyleft/gpl.html
  24  */
  25
  26 if ( !defined( 'MEDIAWIKI' ) ) {
  27         // Eclipse helper - will be ignored in production
  28         require_once( "ApiBase.php" );
  29 }
  30
  31 /**
  32  * This action allows users to get their watchlist items in RSS/Atom formats.
  33  * When executed, it performs a nested call to the API to get the needed data,
  34  * and formats it in a proper format.
  35  *
  36  * @ingroup API
  37  */
  38 class ApiFeedWatchlist extends ApiBase {
  39
  40         public function __construct( $main, $action ) {
  41                 parent::__construct( $main, $action );
  42         }
  43
  44         /**
  45          * This module uses a custom feed wrapper printer.
  46          */
  47         public function getCustomPrinter() {
  48                 return new ApiFormatFeedWrapper( $this->getMain() );
  49         }
  50
  51         /**
  52          * Make a nested call to the API to request watchlist items in the last $hours.
  53          * Wrap the result as an RSS/Atom feed.
  54          */
  55         public function execute() {
  56                 global $wgFeedClasses, $wgFeedLimit, $wgSitename, $wgContLanguageCode;
  57
  58                 try {
  59                         $params = $this->extractRequestParams();
  60
  61                         // limit to the number of hours going from now back
  62                         $endTime = wfTimestamp( TS_MW, time() - intval( $params['hours'] * 60 * 60 ) );
  63
  64                         $dbr = wfGetDB( DB_SLAVE );
  65                         // Prepare parameters for nested request
  66                         $fauxReqArr = array(
  67                                 'action' => 'query',
  68                                 'meta' => 'siteinfo',
  69                                 'siprop' => 'general',
  70                                 'list' => 'watchlist',
  71                                 'wlprop' => 'title|user|comment|timestamp',
  72                                 'wldir' => 'older', // reverse order - from newest to oldest
  73                                 'wlend' => $dbr->timestamp( $endTime ), // stop at this time
  74                                 'wllimit' => ( 50 > $wgFeedLimit ) ? $wgFeedLimit : 50
  75                         );
  76
  77                         if ( !is_null( $params['wlowner'] ) ) {
  78                                 $fauxReqArr['wlowner'] = $params['wlowner'];
  79                         }
  80                         if ( !is_null( $params['wltoken'] ) ) {
  81                                 $fauxReqArr['wltoken'] = $params['wltoken'];
  82                         }
  83
  84                         // Check for 'allrev' parameter, and if found, show all revisions to each page on wl.
  85                         if ( !is_null( $params['allrev'] ) ) {
  86                                 $fauxReqArr['wlallrev'] = '';
  87                         }
  88
  89                         // Create the request
  90                         $fauxReq = new FauxRequest( $fauxReqArr );
  91
  92                         // Execute
  93                         $module = new ApiMain( $fauxReq );
  94                         $module->execute();
  95
  96                         // Get data array
  97                         $data = $module->getResultData();
  98
  99                         $feedItems = array();
 100                         foreach ( (array)$data['query']['watchlist'] as $info ) {
 101                                 $feedItems[] = $this->createFeedItem( $info );
 102                         }
 103
 104                         $feedTitle = $wgSitename . ' - ' . wfMsgForContent( 'watchlist' ) . ' [' . $wgContLanguageCode . ']';
 105                         $feedUrl = SpecialPage::getTitleFor( 'Watchlist' )->getFullURL();
 106
 107                         $feed = new $wgFeedClasses[$params['feedformat']] ( $feedTitle, htmlspecialchars( wfMsgForContent( 'watchlist' ) ), $feedUrl );
 108
 109                         ApiFormatFeedWrapper::setResult( $this->getResult(), $feed, $feedItems );
 110
 111                 } catch ( Exception $e ) {
 112
 113                         // Error results should not be cached
 114                         $this->getMain()->setCacheMaxAge( 0 );
 115
 116                         $feedTitle = $wgSitename . ' - Error - ' . wfMsgForContent( 'watchlist' ) . ' [' . $wgContLanguageCode . ']';
 117                         $feedUrl = SpecialPage::getTitleFor( 'Watchlist' )->getFullURL();
 118
 119                         $feedFormat = isset( $params['feedformat'] ) ? $params['feedformat'] : 'rss';
 120                         $feed = new $wgFeedClasses[$feedFormat] ( $feedTitle, htmlspecialchars( wfMsgForContent( 'watchlist' ) ), $feedUrl );
 121
 122                         if ( $e instanceof UsageException ) {
 123                                 $errorCode = $e->getCodeString();
 124                         } else {
 125                                 // Something is seriously wrong
 126                                 $errorCode = 'internal_api_error';
 127                         }
 128
 129                         $errorText = $e->getMessage();
 130                         $feedItems[] = new FeedItem( "Error ($errorCode)", $errorText, '', '', '' );
 131                         ApiFormatFeedWrapper::setResult( $this->getResult(), $feed, $feedItems );
 132                 }
 133         }
 134
 135         private function createFeedItem( $info ) {
 136                 $titleStr = $info['title'];
 137                 $title = Title::newFromText( $titleStr );
 138                 $titleUrl = $title->getFullURL();
 139                 $comment = isset( $info['comment'] ) ? $info['comment'] : null;
 140                 $timestamp = $info['timestamp'];
 141                 $user = $info['user'];
 142
 143                 $completeText = "$comment ($user)";
 144
 145                 return new FeedItem( $titleStr, $completeText, $titleUrl, $timestamp, $user );
 146         }
 147
 148         public function getAllowedParams() {
 149                 global $wgFeedClasses;
 150                 $feedFormatNames = array_keys( $wgFeedClasses );
 151                 return array (
 152                         'feedformat' => array(
 153                                 ApiBase::PARAM_DFLT => 'rss',
 154                                 ApiBase::PARAM_TYPE => $feedFormatNames
 155                         ),
 156                         'hours' => array(
 157                                 ApiBase::PARAM_DFLT => 24,
 158                                 ApiBase::PARAM_TYPE => 'integer',
 159                                 ApiBase::PARAM_MIN => 1,
 160                                 ApiBase::PARAM_MAX => 72,
 161                         ),
 162                         'allrev' => null,
 163                         'wlowner' => array(
 164                                 ApiBase::PARAM_TYPE => 'user'
 165                         ),
 166                         'wltoken' => array(
 167                                 ApiBase::PARAM_TYPE => 'string'
 168                         )
 169                 );
 170         }
 171
 172         public function getParamDescription() {
 173                 return array(
 174                         'feedformat' => 'The format of the feed',
 175                         'hours'      => 'List pages modified within this many hours from now',
 176                         'allrev'     => 'Include multiple revisions of the same page within given timeframe',
 177                         'wlowner'     => "The user whose watchlist you want (must be accompanied by {$this->getModulePrefix()}token if it's not you)",
 178                         'wltoken'    => 'Security token that requested user set in their preferences'
 179                 );
 180         }
 181
 182         public function getDescription() {
 183                 return 'This module returns a watchlist feed';
 184         }
 185
 186         protected function getExamples() {
 187                 return array(
 188                         'api.php?action=feedwatchlist'
 189                 );
 190         }
 191
 192         public function getVersion() {
 193                 return __CLASS__ . ': $Id$';
 194         }
 195 }