+++ /dev/null
-<?php
-
-/**
- * Feed to Special:RecentChanges and Special:RecentChangesLiked
- *
- * @ingroup Feed
- */
-class ChangesFeed {
- public $format, $type, $titleMsg, $descMsg;
-
- /**
- * Constructor
- *
- * @param $format String: feed's format (either 'rss' or 'atom')
- * @param $type String: type of feed (for cache keys)
- */
- public function __construct( $format, $type ) {
- $this->format = $format;
- $this->type = $type;
- }
-
- /**
- * Get a ChannelFeed subclass object to use
- *
- * @param $title String: feed's title
- * @param $description String: feed's description
- * @return ChannelFeed subclass or false on failure
- */
- public function getFeedObject( $title, $description ) {
- global $wgSitename, $wgLanguageCode, $wgFeedClasses, $wgTitle;
- $feedTitle = "$wgSitename - {$title} [$wgLanguageCode]";
- if( !isset($wgFeedClasses[$this->format] ) )
- return false;
- return new $wgFeedClasses[$this->format](
- $feedTitle, htmlspecialchars( $description ), $wgTitle->getFullUrl() );
- }
-
- /**
- * Generates feed's content
- *
- * @param $feed ChannelFeed subclass object (generally the one returned by getFeedObject())
- * @param $rows ResultWrapper object with rows in recentchanges table
- * @param $lastmod Integer: timestamp of the last item in the recentchanges table (only used for the cache key)
- * @param $opts FormOptions as in SpecialRecentChanges::getDefaultOptions()
- * @return null or true
- */
- public function execute( $feed, $rows, $lastmod, $opts ) {
- global $wgLang, $wgRenderHashAppend;
-
- if ( !FeedUtils::checkFeedOutput( $this->format ) ) {
- return;
- }
-
- $optionsHash = md5( serialize( $opts->getAllValues() ) ) . $wgRenderHashAppend;
- $timekey = wfMemcKey( $this->type, $this->format, $wgLang->getCode(), $optionsHash, 'timestamp' );
- $key = wfMemcKey( $this->type, $this->format, $wgLang->getCode(), $optionsHash );
-
- FeedUtils::checkPurge( $timekey, $key );
-
- /*
- * Bumping around loading up diffs can be pretty slow, so where
- * possible we want to cache the feed output so the next visitor
- * gets it quick too.
- */
- $cachedFeed = $this->loadFromCache( $lastmod, $timekey, $key );
- if( is_string( $cachedFeed ) ) {
- wfDebug( "RC: Outputting cached feed\n" );
- $feed->httpHeaders();
- echo $cachedFeed;
- } else {
- wfDebug( "RC: rendering new feed and caching it\n" );
- ob_start();
- self::generateFeed( $rows, $feed );
- $cachedFeed = ob_get_contents();
- ob_end_flush();
- $this->saveToCache( $cachedFeed, $timekey, $key );
- }
- return true;
- }
-
- /**
- * Save to feed result to $messageMemc
- *
- * @param $feed String: feed's content
- * @param $timekey String: memcached key of the last modification
- * @param $key String: memcached key of the content
- */
- public function saveToCache( $feed, $timekey, $key ) {
- global $messageMemc;
- $expire = 3600 * 24; # One day
- $messageMemc->set( $key, $feed, $expire );
- $messageMemc->set( $timekey, wfTimestamp( TS_MW ), $expire );
- }
-
- /**
- * Try to load the feed result from $messageMemc
- *
- * @param $lastmod Integer: timestamp of the last item in the recentchanges table
- * @param $timekey String: memcached key of the last modification
- * @param $key String: memcached key of the content
- * @return feed's content on cache hit or false on cache miss
- */
- public function loadFromCache( $lastmod, $timekey, $key ) {
- global $wgFeedCacheTimeout, $wgOut, $messageMemc;
-
- $feedLastmod = $messageMemc->get( $timekey );
-
- if( ( $wgFeedCacheTimeout > 0 ) && $feedLastmod ) {
- /*
- * If the cached feed was rendered very recently, we may
- * go ahead and use it even if there have been edits made
- * since it was rendered. This keeps a swarm of requests
- * from being too bad on a super-frequently edited wiki.
- */
-
- $feedAge = time() - wfTimestamp( TS_UNIX, $feedLastmod );
- $feedLastmodUnix = wfTimestamp( TS_UNIX, $feedLastmod );
- $lastmodUnix = wfTimestamp( TS_UNIX, $lastmod );
-
- if( $feedAge < $wgFeedCacheTimeout || $feedLastmodUnix > $lastmodUnix) {
- wfDebug( "RC: loading feed from cache ($key; $feedLastmod; $lastmod)...\n" );
- if ( $feedLastmodUnix < $lastmodUnix ) {
- $wgOut->setLastModified( $feedLastmod ); // bug 21916
- }
- return $messageMemc->get( $key );
- } else {
- wfDebug( "RC: cached feed timestamp check failed ($feedLastmod; $lastmod)\n" );
- }
- }
- return false;
- }
-
- /**
- * Generate the feed items given a row from the database.
- * @param $rows DatabaseBase resource with recentchanges rows
- * @param $feed Feed object
- */
- public static function generateFeed( $rows, &$feed ) {
- wfProfileIn( __METHOD__ );
-
- $feed->outHeader();
-
- # Merge adjacent edits by one user
- $sorted = array();
- $n = 0;
- foreach( $rows as $obj ) {
- if( $n > 0 &&
- $obj->rc_namespace >= 0 &&
- $obj->rc_cur_id == $sorted[$n-1]->rc_cur_id &&
- $obj->rc_user_text == $sorted[$n-1]->rc_user_text ) {
- $sorted[$n-1]->rc_last_oldid = $obj->rc_last_oldid;
- } else {
- $sorted[$n] = $obj;
- $n++;
- }
- }
-
- foreach( $sorted as $obj ) {
- $title = Title::makeTitle( $obj->rc_namespace, $obj->rc_title );
- $talkpage = $title->getTalkPage();
- // Skip items with deleted content (avoids partially complete/inconsistent output)
- if( $obj->rc_deleted ) continue;
- $item = new FeedItem(
- $title->getPrefixedText(),
- FeedUtils::formatDiff( $obj ),
- $obj->rc_this_oldid ? $title->getFullURL( 'diff=' . $obj->rc_this_oldid . '&oldid=prev' ) : $title->getFullURL(),
- $obj->rc_timestamp,
- ($obj->rc_deleted & Revision::DELETED_USER) ? wfMsgHtml('rev-deleted-user') : $obj->rc_user_text,
- $talkpage->getFullURL()
- );
- $feed->outItem( $item );
- }
- $feed->outFooter();
- wfProfileOut( __METHOD__ );
- }
-
-}
scripts.mit.edu / autoinstallsdev / mediawiki.git / blobdiff