class Time

class Time implements TimeInterface {
    
    /**
     * The request stack.
     *
     * @var \Symfony\Component\HttpFoundation\RequestStack
     */
    protected $requestStack;
    
    /**
     * Constructs a Time object.
     *
     * @param \Symfony\Component\HttpFoundation\RequestStack $request_stack
     *   The request stack.
     */
    public function __construct(RequestStack $request_stack) {
        $this->requestStack = $request_stack;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getRequestTime() {
        $request = $this->requestStack
            ->getCurrentRequest();
        if ($request) {
            return $request->server
                ->get('REQUEST_TIME');
        }
        // If this is called prior to the request being pushed to the stack fallback
        // to built-in globals (if available) or the system time.
        return $_SERVER['REQUEST_TIME'] ?? $this->getCurrentTime();
    }
    
    /**
     * {@inheritdoc}
     */
    public function getRequestMicroTime() {
        $request = $this->requestStack
            ->getCurrentRequest();
        if ($request) {
            return $request->server
                ->get('REQUEST_TIME_FLOAT');
        }
        // If this is called prior to the request being pushed to the stack fallback
        // to built-in globals (if available) or the system time.
        return $_SERVER['REQUEST_TIME_FLOAT'] ?? $this->getCurrentMicroTime();
    }
    
    /**
     * {@inheritdoc}
     */
    public function getCurrentTime() {
        return time();
    }
    
    /**
     * {@inheritdoc}
     */
    public function getCurrentMicroTime() {
        return microtime(TRUE);
    }

}