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<?php
declare(strict_types=1);
/**
* Caridea
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
* http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
* @copyright 2015-2018 LibreWorks contributors
* @license Apache-2.0
*/
namespace Caridea\Event;
* Abstract event that can be broadcast to listeners.
abstract class Event
{
* @var object The source of the event
private $source;
* @var float The microtime when the event kicked off
private $when;
* Creates a new event
* @param object $source The source of the event. Cannot be null.
public function __construct($source)
if (!is_object($source)) {
throw new \InvalidArgumentException("Event source must be an object");
}
$this->source = $source;
$this->when = microtime(true);
* Gets the source of the event.
* @return object The source of the event
public function getSource()
return $this->source;
* Gets the time in microseconds when the event kicked off.
* @return float The time of the event
public function getWhen(): float
return $this->when;