includes/api/ApiFeedWatchlist.php

   1 <?php
   2 /**
   3  * API for MediaWiki 1.8+
   4  *
   5  * Created on Oct 13, 2006
   6  *
   7  * Copyright © 2006 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 if ( !defined( 'MEDIAWIKI' ) ) {
  28         // Eclipse helper - will be ignored in production
  29         require_once( "ApiBase.php" );
  30 }
  31
  32 /**
  33  * This action allows users to get their watchlist items in RSS/Atom formats.
  34  * When executed, it performs a nested call to the API to get the needed data,
  35  * and formats it in a proper format.
  36  *
  37  * @ingroup API
  38  */
  39 class ApiFeedWatchlist extends ApiBase {
  40
  41         public function __construct( $main, $action ) {
  42                 parent::__construct( $main, $action );
  43         }
  44
  45         /**
  46          * This module uses a custom feed wrapper printer.
  47          */
  48         public function getCustomPrinter() {
  49                 return new ApiFormatFeedWrapper( $this->getMain() );
  50         }
  51
  52         /**
  53          * Make a nested call to the API to request watchlist items in the last $hours.
  54          * Wrap the result as an RSS/Atom feed.
  55          */
  56         public function execute() {
  57                 global $wgFeedClasses, $wgFeedLimit, $wgSitename, $wgLanguageCode;
  58
  59                 try {
  60                         $params = $this->extractRequestParams();
  61
  62                         // limit to the number of hours going from now back
  63                         $endTime = wfTimestamp( TS_MW, time() - intval( $params['hours'] * 60 * 60 ) );
  64
  65                         $dbr = wfGetDB( DB_SLAVE );
  66                         // Prepare parameters for nested request
  67                         $fauxReqArr = array(
  68                                 'action' => 'query',
  69                                 'meta' => 'siteinfo',
  70                                 'siprop' => 'general',
  71                                 'list' => 'watchlist',
  72                                 'wlprop' => 'title|user|comment|timestamp',
  73                                 'wldir' => 'older', // reverse order - from newest to oldest
  74                                 'wlend' => $dbr->timestamp( $endTime ), // stop at this time
  75                                 'wllimit' => ( 50 > $wgFeedLimit ) ? $wgFeedLimit : 50
  76                         );
  77
  78                         if ( !is_null( $params['wlowner'] ) ) {
  79                                 $fauxReqArr['wlowner'] = $params['wlowner'];
  80                         }
  81                         if ( !is_null( $params['wltoken'] ) ) {
  82                                 $fauxReqArr['wltoken'] = $params['wltoken'];
  83                         }
  84
  85                         // Check for 'allrev' parameter, and if found, show all revisions to each page on wl.
  86                         if ( !is_null( $params['allrev'] ) ) {
  87                                 $fauxReqArr['wlallrev'] = '';
  88                         }
  89
  90                         // Create the request
  91                         $fauxReq = new FauxRequest( $fauxReqArr );
  92
  93                         // Execute
  94                         $module = new ApiMain( $fauxReq );
  95                         $module->execute();
  96
  97                         // Get data array
  98                         $data = $module->getResultData();
  99
 100                         $feedItems = array();
 101                         foreach ( (array)$data['query']['watchlist'] as $info ) {
 102                                 $feedItems[] = $this->createFeedItem( $info );
 103                         }
 104
 105                         $feedTitle = $wgSitename . ' - ' . wfMsgForContent( 'watchlist' ) . ' [' . $wgLanguageCode . ']';
 106                         $feedUrl = SpecialPage::getTitleFor( 'Watchlist' )->getFullURL();
 107
 108                         $feed = new $wgFeedClasses[$params['feedformat']] ( $feedTitle, htmlspecialchars( wfMsgForContent( 'watchlist' ) ), $feedUrl );
 109
 110                         ApiFormatFeedWrapper::setResult( $this->getResult(), $feed, $feedItems );
 111
 112                 } catch ( Exception $e ) {
 113
 114                         // Error results should not be cached
 115                         $this->getMain()->setCacheMaxAge( 0 );
 116
 117                         $feedTitle = $wgSitename . ' - Error - ' . wfMsgForContent( 'watchlist' ) . ' [' . $wgLanguageCode . ']';
 118                         $feedUrl = SpecialPage::getTitleFor( 'Watchlist' )->getFullURL();
 119
 120                         $feedFormat = isset( $params['feedformat'] ) ? $params['feedformat'] : 'rss';
 121                         $feed = new $wgFeedClasses[$feedFormat] ( $feedTitle, htmlspecialchars( wfMsgForContent( 'watchlist' ) ), $feedUrl );
 122
 123                         if ( $e instanceof UsageException ) {
 124                                 $errorCode = $e->getCodeString();
 125                         } else {
 126                                 // Something is seriously wrong
 127                                 $errorCode = 'internal_api_error';
 128                         }
 129
 130                         $errorText = $e->getMessage();
 131                         $feedItems[] = new FeedItem( "Error ($errorCode)", $errorText, '', '', '' );
 132                         ApiFormatFeedWrapper::setResult( $this->getResult(), $feed, $feedItems );
 133                 }
 134         }
 135
 136         private function createFeedItem( $info ) {
 137                 $titleStr = $info['title'];
 138                 $title = Title::newFromText( $titleStr );
 139                 $titleUrl = $title->getFullURL();
 140                 $comment = isset( $info['comment'] ) ? $info['comment'] : null;
 141                 $timestamp = $info['timestamp'];
 142                 $user = $info['user'];
 143
 144                 $completeText = "$comment ($user)";
 145
 146                 return new FeedItem( $titleStr, $completeText, $titleUrl, $timestamp, $user );
 147         }
 148
 149         public function getAllowedParams() {
 150                 global $wgFeedClasses;
 151                 $feedFormatNames = array_keys( $wgFeedClasses );
 152                 return array (
 153                         'feedformat' => array(
 154                                 ApiBase::PARAM_DFLT => 'rss',
 155                                 ApiBase::PARAM_TYPE => $feedFormatNames
 156                         ),
 157                         'hours' => array(
 158                                 ApiBase::PARAM_DFLT => 24,
 159                                 ApiBase::PARAM_TYPE => 'integer',
 160                                 ApiBase::PARAM_MIN => 1,
 161                                 ApiBase::PARAM_MAX => 72,
 162                         ),
 163                         'allrev' => null,
 164                         'wlowner' => array(
 165                                 ApiBase::PARAM_TYPE => 'user'
 166                         ),
 167                         'wltoken' => array(
 168                                 ApiBase::PARAM_TYPE => 'string'
 169                         )
 170                 );
 171         }
 172
 173         public function getParamDescription() {
 174                 return array(
 175                         'feedformat' => 'The format of the feed',
 176                         'hours'      => 'List pages modified within this many hours from now',
 177                         'allrev'     => 'Include multiple revisions of the same page within given timeframe',
 178                         'wlowner'     => "The user whose watchlist you want (must be accompanied by {$this->getModulePrefix()}token if it's not you)",
 179                         'wltoken'    => 'Security token that requested user set in their preferences'
 180                 );
 181         }
 182
 183         public function getDescription() {
 184                 return 'This module returns a watchlist feed';
 185         }
 186
 187         protected function getExamples() {
 188                 return array(
 189                         'api.php?action=feedwatchlist'
 190                 );
 191         }
 192
 193         public function getVersion() {
 194                 return __CLASS__ . ': $Id$';
 195         }
 196 }