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<?php |
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declare(strict_types=1); |
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namespace Stadly\Http\Header\Value\CacheControl; |
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use InvalidArgumentException; |
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use Stadly\Http\Utilities\Rfc7230; |
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use Stadly\Http\Utilities\Rfc7234; |
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/** |
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* Class for handling cache control directives without value. |
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* |
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* Specification: https://tools.ietf.org/html/rfc7234#section-5.2.2 |
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*/ |
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final class ValuelessDirective extends Directive |
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{ |
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public const RESERVED_NAMES = [ |
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'must-revalidate', |
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'no-store', |
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'no-transform', |
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'public', |
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'proxy-revalidate', |
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]; |
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/** |
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* Constructor. |
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* |
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* @param string $name Name. |
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*/ |
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public function __construct(string $name) |
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{ |
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$this->setName($name); |
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1 |
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} |
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/** |
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* Construct directive from string. |
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* |
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* @param string $directive Directive string. |
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* @return self Directive generated based on the string. |
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*/ |
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public static function fromString(string $directive): self |
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{ |
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$regEx = '{^' . Rfc7234::CACHE_DIRECTIVE_CAPTURE . '$}'; |
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if (utf8_decode($directive) !== $directive || preg_match($regEx, $directive, $matches) !== 1) { |
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throw new InvalidArgumentException('Invalid directive: ' . $directive); |
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} |
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if (isset($matches['VALUE'])) { |
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throw new InvalidArgumentException('Invalid value: ' . $matches['VALUE']); |
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} |
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return new self($matches['NAME']); |
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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 $this->name; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function setName(string $name): void |
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{ |
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if (utf8_decode($name) !== $name || preg_match('{^' . Rfc7230::TOKEN . '$}', $name) !== 1) { |
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throw new InvalidArgumentException('Invalid name: ' . $name); |
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} |
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if (in_array(strtolower($name), FieldListDirective::RESERVED_NAMES, /*strict*/true)) { |
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throw new InvalidArgumentException('Name reserved for field list directive: ' . $name); |
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} |
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if (in_array(strtolower($name), IntegerDirective::RESERVED_NAMES, /*strict*/true)) { |
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throw new InvalidArgumentException('Name reserved for integer directive: ' . $name); |
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} |
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$this->name = $name; |
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} |
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/** |
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* @return null Value. |
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*/ |
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1 |
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public function getValue(): ?string |
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{ |
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return null; |
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} |
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} |
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Stadly /
Http
