* * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ declare(strict_types=1); namespace League\Uri\UriTemplate; use League\Uri\Exceptions\SyntaxError; use function preg_match; final class VarSpecifier { /** * Variables specification regular expression pattern. * * @link https://tools.ietf.org/html/rfc6570#section-2.3 */ private const REGEXP_VARSPEC = '/^ (?(?:[A-z0-9_\.]|%[0-9a-fA-F]{2})+) (?\:(?\d+)|\*)? $/x'; /** * @var string */ private $name; /** * @var string */ private $modifier; /** * @var int */ private $position; private function __construct(string $name, string $modifier, int $position) { $this->name = $name; $this->modifier = $modifier; $this->position = $position; } /** * {@inheritDoc} */ public static function __set_state(array $properties): self { return new self($properties['name'], $properties['modifier'], $properties['position']); } public static function createFromString(string $specification): self { if (1 !== preg_match(self::REGEXP_VARSPEC, $specification, $parsed)) { throw new SyntaxError('The variable specification "'.$specification.'" is invalid.'); } $parsed += ['modifier' => '', 'position' => '']; if ('' !== $parsed['position']) { $parsed['position'] = (int) $parsed['position']; $parsed['modifier'] = ':'; } if ('' === $parsed['position']) { $parsed['position'] = 0; } if (10000 <= $parsed['position']) { throw new SyntaxError('The variable specification "'.$specification.'" is invalid the position modifier must be lower than 10000.'); } return new self($parsed['name'], $parsed['modifier'], $parsed['position']); } public function toString(): string { if (0 < $this->position) { return $this->name.$this->modifier.$this->position; } return $this->name.$this->modifier; } public function name(): string { return $this->name; } public function modifier(): string { return $this->modifier; } public function position(): int { return $this->position; } }