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<?php |
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declare(strict_types=1); |
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/** |
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* This file is part of Esi\Clock. |
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* |
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* (c) Eric Sizemore <[email protected]> |
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* |
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* This source file is subject to the MIT license. For the full copyright and |
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* license information, please view the LICENSE file that was distributed with |
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* this source code. |
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*/ |
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namespace Esi\Clock; |
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use DateInvalidTimeZoneException; |
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use DateTimeImmutable; |
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use DateTimeInterface; |
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use DateTimeZone; |
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use Throwable; |
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use function date_default_timezone_get; |
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use function sprintf; |
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/** |
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* A clock that relies on system time. |
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* |
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* @immutable |
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*/ |
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final readonly class SystemClock implements ClockInterface |
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{ |
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private DateTimeZone $timezone; |
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/** |
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* @throws DateInvalidTimeZoneException If $timezone is passed as string and is invalid. |
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*/ |
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public function __construct(DateTimeZone | string | null $timezone = null) |
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{ |
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if (!$timezone instanceof DateTimeZone) { |
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$timezone ??= 'UTC'; |
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try { |
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$this->timezone = new DateTimeZone($timezone === '' ? 'UTC' : $timezone); |
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// \Exception < PHP 8.3, \DateInvalidTimeZoneException >= PHP 8.3 |
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} catch (Throwable $throwable) { |
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throw new DateInvalidTimeZoneException($throwable->getMessage(), \intval($throwable->getCode()), $throwable); |
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} |
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return; |
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} |
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$this->timezone = $timezone; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function __toString(): string |
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{ |
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return sprintf( |
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'[SystemClock("%s"): unixtime: %s; iso8601: %s;]', |
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$this->timezone->getName(), |
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$this->now()->format('U'), |
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$this->now()->format(DateTimeInterface::ISO8601_EXPANDED) |
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); |
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} |
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/** |
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* Create a FrozenClock from the current SystemClock now. |
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*/ |
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public function freeze(): FrozenClock |
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{ |
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return new FrozenClock($this->now()); |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function now(): DateTimeImmutable |
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{ |
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return new DateTimeImmutable('now', $this->timezone); |
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} |
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/** |
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* Returns a new SystemClock at current system time using the system's timezone. |
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* |
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* @throws DateInvalidTimeZoneException |
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*/ |
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public static function fromSystemTimezone(): SystemClock |
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{ |
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return new SystemClock(new DateTimeZone(date_default_timezone_get())); |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public static function fromUtc(): SystemClock |
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{ |
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return new SystemClock(new DateTimeZone('UTC')); |
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} |
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} |
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ericsizemore /
clock
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