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<?php declare(strict_types = 1);
/**
 * Copyright (c) 2017 Holger Woltersdorf & Contributors
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 */
namespace IceHawk\IceHawk\PubSub;
use IceHawk\IceHawk\PubSub\Exceptions\EventSubscriberMethodNotCallable;
use IceHawk\IceHawk\PubSub\Interfaces\CarriesEventData;
use IceHawk\IceHawk\PubSub\Interfaces\SubscribesToEvents;
/**
 * Class AbstractEventSubscriber
 * @package IceHawk\IceHawk\PubSub
 */
abstract class AbstractEventSubscriber implements SubscribesToEvents
{
    final public function acceptsEvent( CarriesEventData $event ) : bool
    {
        return in_array( get_class( $event ), $this->getAcceptedEvents(), true );
    }
    abstract protected function getAcceptedEvents() : array;
    /**
     * @param CarriesEventData $event
     *
     * @throws EventSubscriberMethodNotCallable
     */
    final public function notify( CarriesEventData $event )
    {
        $namespaceComponents = explode( "\\", get_class( $event ) );
        $methodName          = sprintf( 'when%s', preg_replace( '#Event$#', '', end( $namespaceComponents ) ) );
        if ( is_callable( [$this, $methodName] ) )
        {
            $this->{$methodName}( $event );
        }
        else
        {
            throw (new EventSubscriberMethodNotCallable())->withMethodName( $methodName );
        }
    }
}