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<?php
declare(strict_types=1);
namespace Hyde\Framework\Features\Blogging;
use DateTime;
use DateTimeInterface;
use InvalidArgumentException;
/**
* @internal Helper class for handling date prefixes in blog post filenames
*/
class BlogPostDatePrefixHelper
{
* We accept ISO 8601 dates in the format 'YYYY-MM-DD' and optionally a time in the format 'HH-MM', separated by a hyphen.
*
* @var string The regular expression pattern for matching a date prefix in a filename
protected const DATE_PATTERN = '/^(\d{4}-\d{2}-\d{2})(?:-(\d{2}-\d{2}))?-/';
public static function hasDatePrefix(string $filepath): bool
return preg_match(static::DATE_PATTERN, basename($filepath)) === 1;
}
public static function extractDate(string $filepath): DateTimeInterface
if (! preg_match(static::DATE_PATTERN, basename($filepath), $matches)) {
throw new InvalidArgumentException('The given filepath does not contain a valid ISO 8601 date prefix.');
$dateString = $matches[1];
if (isset($matches[2])) {
$dateString .= ' '.str_replace('-', ':', $matches[2]);
return new DateTime($dateString);
public static function stripDatePrefix(string $filepath): string
return preg_replace(static::DATE_PATTERN, '', basename($filepath));
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