includes/EventRelayerGroup.php

   1 <?php
   2 /**
   3  * Factory class for spawning EventRelayer objects using configuration
   4  *
   5  * @author Aaron Schulz
   6  * @since 1.27
   7  */
   8 class EventRelayerGroup {
   9         /** @var array[] */
  10         protected $configByChannel = [];
  11
  12         /** @var EventRelayer[] */
  13         protected $relayers = [];
  14
  15         /** @var EventRelayerGroup */
  16         protected static $instance = null;
  17
  18         /**
  19          * @param Config $config
  20          */
  21         protected function __construct( Config $config ) {
  22                 $this->configByChannel = $config->get( 'EventRelayerConfig' );
  23         }
  24
  25         /**
  26          * @return EventRelayerGroup
  27          */
  28         public static function singleton() {
  29                 if ( !self::$instance ) {
  30                         self::$instance = new self( RequestContext::getMain()->getConfig() );
  31                 }
  32
  33                 return self::$instance;
  34         }
  35
  36         /**
  37          * @param string $channel
  38          * @return EventRelayer Relayer instance that handles the given channel
  39          */
  40         public function getRelayer( $channel ) {
  41                 $channelKey = isset( $this->configByChannel[$channel] )
  42                         ? $channel
  43                         : 'default';
  44
  45                 if ( !isset( $this->relayers[$channelKey] ) ) {
  46                         if ( !isset( $this->configByChannel[$channelKey] ) ) {
  47                                 throw new UnexpectedValueException( "No config for '$channelKey'" );
  48                         }
  49
  50                         $config = $this->configByChannel[$channelKey];
  51                         $class = $config['class'];
  52
  53                         $this->relayers[$channelKey] = new $class( $config );
  54                 }
  55
  56                 return $this->relayers[$channelKey];
  57         }
  58 }