includes/api/ApiFeedWatchlist.php

   1 <?php
   2
   3 /*
   4  * Created on Oct 13, 2006
   5  *
   6  * API for MediaWiki 1.8+
   7  *
   8  * Copyright (C) 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
  57                 global $wgFeedClasses, $wgFeedLimit, $wgSitename, $wgContLanguageCode;
  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                         // Check for 'allrev' parameter, and if found, show all revisions to each page on wl.
  79                         if ( ! is_null ( $params['allrev'] ) )  $fauxReqArr['wlallrev'] = '';
  80
  81                         // Create the request
  82                         $fauxReq = new FauxRequest ( $fauxReqArr );
  83
  84                         // Execute
  85                         $module = new ApiMain($fauxReq);
  86                         $module->execute();
  87
  88                         // Get data array
  89                         $data = $module->getResultData();
  90
  91                         $feedItems = array ();
  92                         foreach ($data['query']['watchlist'] as $info) {
  93                                 $feedItems[] = $this->createFeedItem($info);
  94                         }
  95
  96                         $feedTitle = $wgSitename . ' - ' . wfMsgForContent('watchlist') . ' [' . $wgContLanguageCode . ']';
  97                         $feedUrl = SpecialPage::getTitleFor( 'Watchlist' )->getFullUrl();
  98
  99                         $feed = new $wgFeedClasses[$params['feedformat']] ($feedTitle, htmlspecialchars(wfMsgForContent('watchlist')), $feedUrl);
 100
 101                         ApiFormatFeedWrapper :: setResult($this->getResult(), $feed, $feedItems);
 102
 103                 } catch (Exception $e) {
 104
 105                         // Error results should not be cached
 106                         $this->getMain()->setCacheMaxAge(0);
 107
 108                         $feedTitle = $wgSitename . ' - Error - ' . wfMsgForContent('watchlist') . ' [' . $wgContLanguageCode . ']';
 109                         $feedUrl = SpecialPage::getTitleFor( 'Watchlist' )->getFullUrl();
 110
 111                         $feedFormat = isset($params['feedformat']) ? $params['feedformat'] : 'rss';
 112                         $feed = new $wgFeedClasses[$feedFormat] ($feedTitle, htmlspecialchars(wfMsgForContent('watchlist')), $feedUrl);
 113
 114
 115                         if ($e instanceof UsageException) {
 116                                 $errorCode = $e->getCodeString();
 117                         } else {
 118                                 // Something is seriously wrong
 119                                 $errorCode = 'internal_api_error';
 120                         }
 121
 122                         $errorText = $e->getMessage();
 123                         $feedItems[] = new FeedItem("Error ($errorCode)", $errorText, "", "", "");
 124                         ApiFormatFeedWrapper :: setResult($this->getResult(), $feed, $feedItems);
 125                 }
 126         }
 127
 128         private function createFeedItem($info) {
 129                 $titleStr = $info['title'];
 130                 $title = Title :: newFromText($titleStr);
 131                 $titleUrl = $title->getFullUrl();
 132                 $comment = isset( $info['comment'] ) ? $info['comment'] : null;
 133                 $timestamp = $info['timestamp'];
 134                 $user = $info['user'];
 135
 136                 $completeText = "$comment ($user)";
 137
 138                 return new FeedItem($titleStr, $completeText, $titleUrl, $timestamp, $user);
 139         }
 140
 141         public function getAllowedParams() {
 142                 global $wgFeedClasses;
 143                 $feedFormatNames = array_keys($wgFeedClasses);
 144                 return array (
 145                         'feedformat' => array (
 146                                 ApiBase :: PARAM_DFLT => 'rss',
 147                                 ApiBase :: PARAM_TYPE => $feedFormatNames
 148                         ),
 149                         'hours' => array (
 150                                 ApiBase :: PARAM_DFLT => 24,
 151                                 ApiBase :: PARAM_TYPE => 'integer',
 152                                 ApiBase :: PARAM_MIN => 1,
 153                                 ApiBase :: PARAM_MAX => 72,
 154                         ),
 155                         'allrev' => null
 156                 );
 157         }
 158
 159         public function getParamDescription() {
 160                 return array (
 161                         'feedformat' => 'The format of the feed',
 162                         'hours'      => 'List pages modified within this many hours from now',
 163                         'allrev'     => 'Include multiple revisions of the same page within given timeframe.'
 164                 );
 165         }
 166
 167         public function getDescription() {
 168                 return 'This module returns a watchlist feed';
 169         }
 170
 171         protected function getExamples() {
 172                 return array (
 173                         'api.php?action=feedwatchlist'
 174                 );
 175         }
 176
 177         public function getVersion() {
 178                 return __CLASS__ . ': $Id$';
 179         }
 180 }