includes/api/ApiFeedWatchlist.php

   1 <?php
   2 /**
   3  *
   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         private $linkToDiffs = false;
  53
  54         /**
  55          * Make a nested call to the API to request watchlist items in the last $hours.
  56          * Wrap the result as an RSS/Atom feed.
  57          */
  58         public function execute() {
  59                 global $wgFeed, $wgFeedClasses, $wgFeedLimit, $wgSitename, $wgLanguageCode;
  60
  61                 try {
  62                         $params = $this->extractRequestParams();
  63
  64                         if( !$wgFeed ) {
  65                                 $this->dieUsage( 'Syndication feeds are not available', 'feed-unavailable' );
  66                         }
  67
  68                         if( !isset( $wgFeedClasses[ $params['feedformat'] ] ) ) {
  69                                 $this->dieUsage( 'Invalid subscription feed type', 'feed-invalid' );
  70                         }
  71
  72                         // limit to the number of hours going from now back
  73                         $endTime = wfTimestamp( TS_MW, time() - intval( $params['hours'] * 60 * 60 ) );
  74
  75                         // Prepare parameters for nested request
  76                         $fauxReqArr = array(
  77                                 'action' => 'query',
  78                                 'meta' => 'siteinfo',
  79                                 'siprop' => 'general',
  80                                 'list' => 'watchlist',
  81                                 'wlprop' => 'title|user|comment|timestamp',
  82                                 'wldir' => 'older', // reverse order - from newest to oldest
  83                                 'wlend' => $endTime, // stop at this time
  84                                 'wllimit' => ( 50 > $wgFeedLimit ) ? $wgFeedLimit : 50
  85                         );
  86
  87                         if ( !is_null( $params['wlowner'] ) ) {
  88                                 $fauxReqArr['wlowner'] = $params['wlowner'];
  89                         }
  90                         if ( !is_null( $params['wltoken'] ) ) {
  91                                 $fauxReqArr['wltoken'] = $params['wltoken'];
  92                         }
  93
  94                         // Support linking to diffs instead of article
  95                         if ( $params['linktodiffs'] ) {
  96                                 $this->linkToDiffs = true;
  97                                 $fauxReqArr['wlprop'] .= '|ids';
  98                         }
  99
 100                         // Check for 'allrev' parameter, and if found, show all revisions to each page on wl.
 101                         if ( !is_null( $params['allrev'] ) ) {
 102                                 $fauxReqArr['wlallrev'] = '';
 103                         }
 104
 105                         // Create the request
 106                         $fauxReq = new FauxRequest( $fauxReqArr );
 107
 108                         // Execute
 109                         $module = new ApiMain( $fauxReq );
 110                         $module->execute();
 111
 112                         // Get data array
 113                         $data = $module->getResultData();
 114
 115                         $feedItems = array();
 116                         foreach ( (array)$data['query']['watchlist'] as $info ) {
 117                                 $feedItems[] = $this->createFeedItem( $info );
 118                         }
 119
 120                         $msg = wfMsgForContent( 'watchlist' );
 121
 122                         $feedTitle = $wgSitename . ' - ' . $msg . ' [' . $wgLanguageCode . ']';
 123                         $feedUrl = SpecialPage::getTitleFor( 'Watchlist' )->getFullURL();
 124
 125                         $feed = new $wgFeedClasses[$params['feedformat']] ( $feedTitle, htmlspecialchars( $msg ), $feedUrl );
 126
 127                         ApiFormatFeedWrapper::setResult( $this->getResult(), $feed, $feedItems );
 128
 129                 } catch ( Exception $e ) {
 130
 131                         // Error results should not be cached
 132                         $this->getMain()->setCacheMaxAge( 0 );
 133
 134                         $feedTitle = $wgSitename . ' - Error - ' . wfMsgForContent( 'watchlist' ) . ' [' . $wgLanguageCode . ']';
 135                         $feedUrl = SpecialPage::getTitleFor( 'Watchlist' )->getFullURL();
 136
 137                         $feedFormat = isset( $params['feedformat'] ) ? $params['feedformat'] : 'rss';
 138                         $feed = new $wgFeedClasses[$feedFormat] ( $feedTitle, htmlspecialchars( wfMsgForContent( 'watchlist' ) ), $feedUrl );
 139
 140                         if ( $e instanceof UsageException ) {
 141                                 $errorCode = $e->getCodeString();
 142                         } else {
 143                                 // Something is seriously wrong
 144                                 $errorCode = 'internal_api_error';
 145                         }
 146
 147                         $errorText = $e->getMessage();
 148                         $feedItems[] = new FeedItem( "Error ($errorCode)", $errorText, '', '', '' );
 149                         ApiFormatFeedWrapper::setResult( $this->getResult(), $feed, $feedItems );
 150                 }
 151         }
 152
 153         private function createFeedItem( $info ) {
 154                 $titleStr = $info['title'];
 155                 $title = Title::newFromText( $titleStr );
 156                 if ( $this->linkToDiffs && isset( $info['revid'] ) ) {
 157                         $titleUrl = $title->getFullURL( array( 'diff' => $info['revid'] ) );
 158                 } else {
 159                         $titleUrl = $title->getFullURL();
 160                 }
 161                 $comment = isset( $info['comment'] ) ? $info['comment'] : null;
 162                 $timestamp = $info['timestamp'];
 163                 $user = $info['user'];
 164
 165                 $completeText = "$comment ($user)";
 166
 167                 return new FeedItem( $titleStr, $completeText, $titleUrl, $timestamp, $user );
 168         }
 169
 170         public function getAllowedParams() {
 171                 global $wgFeedClasses;
 172                 $feedFormatNames = array_keys( $wgFeedClasses );
 173                 return array (
 174                         'feedformat' => array(
 175                                 ApiBase::PARAM_DFLT => 'rss',
 176                                 ApiBase::PARAM_TYPE => $feedFormatNames
 177                         ),
 178                         'hours' => array(
 179                                 ApiBase::PARAM_DFLT => 24,
 180                                 ApiBase::PARAM_TYPE => 'integer',
 181                                 ApiBase::PARAM_MIN => 1,
 182                                 ApiBase::PARAM_MAX => 72,
 183                         ),
 184                         'allrev' => false,
 185                         'wlowner' => array(
 186                                 ApiBase::PARAM_TYPE => 'user'
 187                         ),
 188                         'wltoken' => array(
 189                                 ApiBase::PARAM_TYPE => 'string'
 190                         ),
 191                         'linktodiffs' => false,
 192                 );
 193         }
 194
 195         public function getParamDescription() {
 196                 return array(
 197                         'feedformat' => 'The format of the feed',
 198                         'hours'      => 'List pages modified within this many hours from now',
 199                         'allrev'     => 'Include multiple revisions of the same page within given timeframe',
 200                         'wlowner'    => "The user whose watchlist you want (must be accompanied by {$this->getModulePrefix()}token if it's not you)",
 201                         'wltoken'    => 'Security token that requested user set in their preferences',
 202                         'linktodiffs' => 'Link to change differences instead of article pages'
 203                 );
 204         }
 205
 206         public function getDescription() {
 207                 return 'Returns a watchlist feed';
 208         }
 209
 210         public function getPossibleErrors() {
 211                 return array_merge( parent::getPossibleErrors(), array(
 212                         array( 'code' => 'feed-unavailable', 'info' => 'Syndication feeds are not available' ),
 213                         array( 'code' => 'feed-invalid', 'info' => 'Invalid subscription feed type' ),
 214                 ) );
 215         }
 216
 217         public function getExamples() {
 218                 return array(
 219                         'api.php?action=feedwatchlist',
 220                         'api.php?action=feedwatchlist&allrev=&linktodiffs=&hours=6'
 221                 );
 222         }
 223
 224         public function getHelpUrls() {
 225                 return 'http://www.mediawiki.org/wiki/API:Watchlist_feed';
 226         }
 227
 228         public function getVersion() {
 229                 return __CLASS__ . ': $Id$';
 230         }
 231 }