5 public $format, $type, $titleMsg, $descMsg;
7 public function __construct( $format, $type ) {
8 $this->format
= $format;
12 public function getFeedObject( $title, $description ) {
13 global $wgSitename, $wgContLanguageCode, $wgFeedClasses, $wgTitle;
14 $feedTitle = "$wgSitename - {$title} [$wgContLanguageCode]";
15 if( !isset($wgFeedClasses[$this->format
] ) )
17 return new $wgFeedClasses[$this->format
](
18 $feedTitle, htmlspecialchars( $description ), $wgTitle->getFullUrl() );
21 public function execute( $feed, $rows, $limit = 0 , $hideminor = false, $lastmod = false ) {
22 global $messageMemc, $wgFeedCacheTimeout;
23 global $wgFeedClasses, $wgTitle, $wgSitename, $wgContLanguageCode;
25 if ( !FeedUtils
::checkFeedOutput( $this->format
) ) {
29 $timekey = wfMemcKey( $this->type
, $this->format
, 'timestamp' );
30 $key = wfMemcKey( $this->type
, $this->format
, 'limit', $limit, 'minor', $hideminor );
32 FeedUtils
::checkPurge($timekey, $key);
35 * Bumping around loading up diffs can be pretty slow, so where
36 * possible we want to cache the feed output so the next visitor
39 $cachedFeed = $this->loadFromCache( $lastmod, $timekey, $key );
40 if( is_string( $cachedFeed ) ) {
41 wfDebug( "RC: Outputting cached feed\n" );
45 wfDebug( "RC: rendering new feed and caching it\n" );
47 self
::generateFeed( $rows, $feed );
48 $cachedFeed = ob_get_contents();
50 $this->saveToCache( $cachedFeed, $timekey, $key );
55 public function saveToCache( $feed, $timekey, $key ) {
57 $expire = 3600 * 24; # One day
58 $messageMemc->set( $key, $feed );
59 $messageMemc->set( $timekey, wfTimestamp( TS_MW
), $expire );
62 public function loadFromCache( $lastmod, $timekey, $key ) {
63 global $wgFeedCacheTimeout, $messageMemc;
64 $feedLastmod = $messageMemc->get( $timekey );
66 if( ( $wgFeedCacheTimeout > 0 ) && $feedLastmod ) {
68 * If the cached feed was rendered very recently, we may
69 * go ahead and use it even if there have been edits made
70 * since it was rendered. This keeps a swarm of requests
71 * from being too bad on a super-frequently edited wiki.
74 $feedAge = time() - wfTimestamp( TS_UNIX
, $feedLastmod );
75 $feedLastmodUnix = wfTimestamp( TS_UNIX
, $feedLastmod );
76 $lastmodUnix = wfTimestamp( TS_UNIX
, $lastmod );
78 if( $feedAge < $wgFeedCacheTimeout ||
$feedLastmodUnix > $lastmodUnix) {
79 wfDebug( "RC: loading feed from cache ($key; $feedLastmod; $lastmod)...\n" );
80 return $messageMemc->get( $key );
82 wfDebug( "RC: cached feed timestamp check failed ($feedLastmod; $lastmod)\n" );
89 * Generate the feed items given a row from the database.
90 * @param $rows Database resource with recentchanges rows
91 * @param $feed Feed object
93 public static function generateFeed( $rows, &$feed ) {
94 wfProfileIn( __METHOD__
);
98 # Merge adjacent edits by one user
101 foreach( $rows as $obj ) {
103 $obj->rc_namespace
>= 0 &&
104 $obj->rc_cur_id
== $sorted[$n-1]->rc_cur_id
&&
105 $obj->rc_user_text
== $sorted[$n-1]->rc_user_text
) {
106 $sorted[$n-1]->rc_last_oldid
= $obj->rc_last_oldid
;
113 foreach( $sorted as $obj ) {
114 $title = Title
::makeTitle( $obj->rc_namespace
, $obj->rc_title
);
115 $talkpage = $title->getTalkPage();
116 $item = new FeedItem(
117 $title->getPrefixedText(),
118 FeedUtils
::formatDiff( $obj ),
119 $title->getFullURL( 'diff=' . $obj->rc_this_oldid
. '&oldid=prev' ),
121 ($obj->rc_deleted
& Revision
::DELETED_USER
) ?
wfMsgHtml('rev-deleted-user') : $obj->rc_user_text
,
122 $talkpage->getFullURL()
124 $feed->outItem( $item );
127 wfProfileOut( __METHOD__
);