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<?php
namespace jobd\messages;
abstract class Message {
const REQUEST = 0;
const RESPONSE = 1;
const PING = 2;
const PONG = 3;
protected $type;
/**
* Message constructor.
* @param int $type
*/
public function __construct(int $type)
{
$this->type = $type;
}
/**
* @return array
*/
abstract protected function getContent(): array;
/**
* @return string
*/
public function serialize(): string
{
$data = [$this->type];
$content = $this->getContent();
if (!empty($content))
$data[] = $content;
return json_encode($data);
}
}
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