includes/changes/ChangesFeed.php

   1 <?php
   2 /**
   3  * Feed for list of changes.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 use MediaWiki\MediaWikiServices;
  24
  25 /**
  26  * Feed to Special:RecentChanges and Special:RecentChangesLinked.
  27  *
  28  * @ingroup Feed
  29  */
  30 class ChangesFeed {
  31         private $format;
  32
  33         /**
  34          * @param string $format Feed's format (either 'rss' or 'atom')
  35          */
  36         public function __construct( $format ) {
  37                 $this->format = $format;
  38         }
  39
  40         /**
  41          * Get a ChannelFeed subclass object to use
  42          *
  43          * @param string $title Feed's title
  44          * @param string $description Feed's description
  45          * @param string $url Url of origin page
  46          * @return ChannelFeed|bool ChannelFeed subclass or false on failure
  47          */
  48         public function getFeedObject( $title, $description, $url ) {
  49                 global $wgSitename, $wgLanguageCode, $wgFeedClasses;
  50
  51                 if ( !isset( $wgFeedClasses[$this->format] ) ) {
  52                         return false;
  53                 }
  54
  55                 if ( !array_key_exists( $this->format, $wgFeedClasses ) ) {
  56                         // falling back to atom
  57                         $this->format = 'atom';
  58                 }
  59
  60                 $feedTitle = "$wgSitename  - {$title} [$wgLanguageCode]";
  61                 return new $wgFeedClasses[$this->format](
  62                         $feedTitle, htmlspecialchars( $description ), $url );
  63         }
  64
  65         /**
  66          * Generate the feed items given a row from the database.
  67          * @param object $rows IDatabase resource with recentchanges rows
  68          * @return array
  69          */
  70         public static function buildItems( $rows ) {
  71                 $items = [];
  72
  73                 # Merge adjacent edits by one user
  74                 $sorted = [];
  75                 $n = 0;
  76                 foreach ( $rows as $obj ) {
  77                         if ( $obj->rc_type == RC_EXTERNAL ) {
  78                                 continue;
  79                         }
  80
  81                         if ( $n > 0 &&
  82                                 $obj->rc_type == RC_EDIT &&
  83                                 $obj->rc_namespace >= 0 &&
  84                                 $obj->rc_cur_id == $sorted[$n - 1]->rc_cur_id &&
  85                                 $obj->rc_user_text == $sorted[$n - 1]->rc_user_text ) {
  86                                 $sorted[$n - 1]->rc_last_oldid = $obj->rc_last_oldid;
  87                         } else {
  88                                 $sorted[$n] = $obj;
  89                                 $n++;
  90                         }
  91                 }
  92
  93                 $nsInfo = MediaWikiServices::getInstance()->getNamespaceInfo();
  94                 foreach ( $sorted as $obj ) {
  95                         $title = Title::makeTitle( $obj->rc_namespace, $obj->rc_title );
  96                         $talkpage = $nsInfo->hasTalkNamespace( $obj->rc_namespace ) && $title->isValid()
  97                                 ? $title->getTalkPage()->getFullURL()
  98                                 : '';
  99
 100                         // Skip items with deleted content (avoids partially complete/inconsistent output)
 101                         if ( $obj->rc_deleted ) {
 102                                 continue;
 103                         }
 104
 105                         if ( $obj->rc_this_oldid ) {
 106                                 $url = $title->getFullURL( [
 107                                         'diff' => $obj->rc_this_oldid,
 108                                         'oldid' => $obj->rc_last_oldid,
 109                                 ] );
 110                         } else {
 111                                 // log entry or something like that.
 112                                 $url = $title->getFullURL();
 113                         }
 114
 115                         $items[] = new FeedItem(
 116                                 $title->getPrefixedText(),
 117                                 FeedUtils::formatDiff( $obj ),
 118                                 $url,
 119                                 $obj->rc_timestamp,
 120                                 ( $obj->rc_deleted & Revision::DELETED_USER )
 121                                         ? wfMessage( 'rev-deleted-user' )->escaped() : $obj->rc_user_text,
 122                                 $talkpage
 123                         );
 124                 }
 125
 126                 return $items;
 127         }
 128 }