RCFeed.php

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<?php
abstract class RCFeed {
    public function __construct( array $params = [] ) {
    }
 
    abstract public function notify( RecentChange $rc, $actionComment = null );
 
    final public static function factory( array $params ): RCFeed {
        if ( !isset( $params['class'] ) ) {
            if ( !isset( $params['uri'] ) ) {
                throw new InvalidArgumentException( 'RCFeeds must have a class set' );
            }
            if ( strpos( $params['uri'], 'udp:' ) === 0 ) {
                $params['class'] = UDPRCFeedEngine::class;
            } elseif ( strpos( $params['uri'], 'redis:' ) === 0 ) {
                $params['class'] = RedisPubSubFeedEngine::class;
            } else {
                global $wgRCEngines;
                wfDeprecated( '$wgRCFeeds without class', '1.38' );
                $scheme = parse_url( $params['uri'], PHP_URL_SCHEME );
                if ( !$scheme ) {
                    throw new InvalidArgumentException( "Invalid RCFeed uri: {$params['uri']}" );
                }
                if ( !isset( $wgRCEngines[$scheme] ) ) {
                    throw new InvalidArgumentException( "Unknown RCFeed engine: $scheme" );
                }
                $params['class'] = $wgRCEngines[$scheme];
            }
        }
 
        $class = $params['class'];
        if ( defined( 'MW_PHPUNIT_TEST' ) && is_object( $class ) ) {
            return $class;
        }
        if ( !class_exists( $class ) ) {
            throw new InvalidArgumentException( "Unknown class '$class'." );
        }
        return new $class( $params );
    }
}