Created
April 3, 2020 14:13
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Example abstraction that only allows a resolution of "day" for time inside a specific business domain
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<?php | |
declare(strict_types=1); | |
namespace Core\Domain\Time; | |
use DateTimeImmutable; | |
use DateTimeZone; | |
use Generator; | |
use Iterator; | |
use function sprintf; | |
use Webmozart\Assert\Assert; | |
/** @psalm-immutable */ | |
final class Day | |
{ | |
public const FORMAT = '/^(\d{4})-(\d{2})-(\d{2})$/'; | |
/** @var string */ | |
private $date; | |
private function __construct(string $date) | |
{ | |
$this->date = $date; | |
} | |
/** | |
* @param string $date in format YYYY-mm-dd | |
* | |
* @see Day::FORMAT | |
* | |
* @psalm-pure | |
*/ | |
public static function fromDateString(string $date): self | |
{ | |
Assert::regex($date, self::FORMAT); | |
$dateObject = DateTimeImmutable::createFromFormat('Y-m-d', $date, new DateTimeZone('UTC')); | |
Assert::object($dateObject, sprintf('Given date "%s" does not appear to be a valid date', $date)); | |
Assert::same($date, $dateObject->format('Y-m-d'), sprintf('Given date "%s" does not appear to be a valid date', $date)); | |
return new self($date); | |
} | |
public static function fromDate(DateTimeImmutable $date): self | |
{ | |
return new self($date->format('Y-m-d')); | |
} | |
public function equals(self $other): bool | |
{ | |
return $other->date === $this->date; | |
} | |
public function isAfter(self $other): bool | |
{ | |
return $this->toDateTimeImmutable() > $other->toDateTimeImmutable(); | |
} | |
public function toDateTimeImmutable(): DateTimeImmutable | |
{ | |
$dateObject = DateTimeImmutable::createFromFormat('Y-m-d H:i:s.u', $this->date.' 00:00:00.0', new DateTimeZone('UTC')); | |
Assert::object($dateObject); | |
return $dateObject; | |
} | |
public function toString(): string | |
{ | |
return $this->date; | |
} | |
} |
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