SignalGenerator.php

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<?php
namespace ILIAS\UI\Implementation\Component;

class SignalGenerator implements SignalGeneratorInterface
{
    const PREFIX = 'il_signal_';

    public function create($class = '')
    {
        $id = $this->createId();
        $instance = ($class) ? new $class($id) : new Signal($id);
        return $instance;
    }

    protected function createId()
    {
        return str_replace(".", "_", uniqid(self::PREFIX, true));
    }
}