includes/EventRelayerGroup.php

   1 <?php
   2 /**
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation; either version 2 of the License, or
   6  * (at your option) any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  16  * http://www.gnu.org/copyleft/gpl.html
  17  *
  18  * @file
  19  */
  20
  21 /**
  22  * Factory class for spawning EventRelayer objects using configuration
  23  *
  24  * @since 1.27
  25  */
  26 class EventRelayerGroup {
  27         /** @var array[] */
  28         protected $configByChannel = [];
  29
  30         /** @var EventRelayer[] */
  31         protected $relayers = [];
  32
  33         /**
  34          * @param array[] $config Channel configuration
  35          */
  36         public function __construct( array $config ) {
  37                 $this->configByChannel = $config;
  38         }
  39
  40         /**
  41          * @param string $channel
  42          * @return EventRelayer Relayer instance that handles the given channel
  43          */
  44         public function getRelayer( $channel ) {
  45                 $channelKey = isset( $this->configByChannel[$channel] )
  46                         ? $channel
  47                         : 'default';
  48
  49                 if ( !isset( $this->relayers[$channelKey] ) ) {
  50                         if ( !isset( $this->configByChannel[$channelKey] ) ) {
  51                                 throw new UnexpectedValueException( "No config for '$channelKey'" );
  52                         }
  53
  54                         $config = $this->configByChannel[$channelKey];
  55                         $class = $config['class'];
  56
  57                         $this->relayers[$channelKey] = new $class( $config );
  58                 }
  59
  60                 return $this->relayers[$channelKey];
  61         }
  62 }