File Nexus/Clock/SystemClock.php

1:	<?php
2:
3:	declare(strict_types=1);
4:
5:	/**
6:	* This file is part of the Nexus framework.
7:	*
8:	* (c) John Paul E. Balandan, CPA <paulbalandan@gmail.com>
9:	*
10:	* For the full copyright and license information, please view
11:	* the LICENSE file that was distributed with this source code.
12:	*/
13:
14:	namespace Nexus\Clock;
15:
16:	/**
17:	* A clock that relies on the system time.
18:	*
19:	* @immutable
20:	*/
21:	final readonly class SystemClock implements Clock
22:	{
23:	private \DateTimeZone $timezone;
24:
25:	public function __construct(\DateTimeZone\|string $timezone)
26:	{
27:	$this->timezone = \is_string($timezone) ? new \DateTimeZone($timezone) : $timezone;
28:	}
29:
30:	public function now(): \DateTimeImmutable
31:	{
32:	return new \DateTimeImmutable('now', $this->timezone);
33:	}
34:
35:	public function sleep(float\|int $seconds): void
36:	{
37:	if ($seconds <= 0) {
38:	return;
39:	}
40:
41:	$microseconds = (int) ($seconds * 1_000_000);
42:	$seconds = (int) floor($microseconds / 1_000_000);
43:	$microseconds %= 1_000_000;
44:
45:	sleep($seconds);
46:	usleep($microseconds);
47:	}
48:	}
49: