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<?php
declare(strict_types=1);
namespace SpomkyLabs\Pki\X509\Feature;
use DateTimeImmutable;
use DateTimeZone;
use Exception;
use RuntimeException;
use UnexpectedValueException;
/**
* Helper trait for classes employing date and time handling.
*/
trait DateTimeHelper
{
/**
* Create DateTime object from time string and timezone.
*
* @param null|string $time Time string, default to 'now'
* @param null|string $tz Timezone, default if omitted
*/
private static function createDateTime(?string $time = null, ?string $tz = null): DateTimeImmutable
{
if (! isset($time)) {
$time = 'now';
}
if (! isset($tz)) {
$tz = date_default_timezone_get();
}
try {
$dt = new DateTimeImmutable($time, self::createTimeZone($tz));
return self::roundDownFractionalSeconds($dt);
} catch (Exception $e) {
throw new RuntimeException('Failed to create DateTime:', 0, $e);
}
}
/**
* Rounds a \DateTimeImmutable value such that fractional seconds are removed.
*/
private static function roundDownFractionalSeconds(DateTimeImmutable $dt): DateTimeImmutable
{
return DateTimeImmutable::createFromFormat('Y-m-d H:i:s', $dt->format('Y-m-d H:i:s'), $dt->getTimezone());
}
/**
* Create DateTimeZone object from string.
*/
private static function createTimeZone(string $tz): DateTimeZone
{
try {
return new DateTimeZone($tz);
} catch (Exception $e) {
throw new UnexpectedValueException('Invalid timezone.', 0, $e);
}
}
}