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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 ArrayIterator; |
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use InvalidArgumentException; |
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use IteratorAggregate; |
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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 with field list 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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* @implements IteratorAggregate<int, string> |
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*/ |
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final class FieldListDirective extends Directive implements IteratorAggregate |
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{ |
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public const RESERVED_NAMES = [ |
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'no-cache', |
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'private', |
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]; |
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/** |
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* @var array<string, string> Field names. |
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*/ |
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private $fields = []; |
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/** |
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* Constructor. |
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* |
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* @param string $name Name. |
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* @param string ...$fields Field names to include in the field list. |
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*/ |
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public function __construct(string $name, string ...$fields) |
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{ |
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$this->setName($name); |
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$this->add(...$fields); |
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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('Directive must have value'); |
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} |
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$value = $matches['VALUE']; |
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// Strip slashes if value is quoted. |
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if (mb_strlen($value) >= 2 && mb_substr($value, 0, 1) === '"' && mb_substr($value, -1) === '"') { |
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$value = stripslashes(mb_substr($value, 1, -1)); |
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} |
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$fieldNamesRegEx = '{^' . Rfc7230::hashRule(Rfc7230::FIELD_NAME) . '$}'; |
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if (utf8_decode($value) !== $value || preg_match($fieldNamesRegEx, $value) !== 1) { |
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throw new InvalidArgumentException('Invalid value: ' . $value); |
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} |
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$fieldNameRegEx = '{' . Rfc7230::FIELD_NAME_CAPTURE . '}'; |
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preg_match_all($fieldNameRegEx, $value, $fieldMatches); |
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return new self($matches['NAME'], ...$fieldMatches['FIELD_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 . '="' . $this->getValue() . '"'; |
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} |
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/** |
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* @param string $name Name. |
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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), IntegerDirective::RESERVED_NAMES, /*strict*/true)) { |
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throw new InvalidArgumentException('Name reserved for integer directive: ' . $name); |
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} |
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if (in_array(strtolower($name), ValuelessDirective::RESERVED_NAMES, /*strict*/true)) { |
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throw new InvalidArgumentException('Name reserved for valueless 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 string Value. |
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*/ |
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public function getValue(): string |
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{ |
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return implode(', ', $this->fields); |
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} |
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/** |
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* Add field names to the field list. |
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* |
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* @param string ...$fields Field names to add. |
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*/ |
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public function add(string ...$fields): void |
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{ |
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foreach ($fields as $field) { |
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if (utf8_decode($field) !== $field || preg_match('{^' . Rfc7230::FIELD_NAME . '$}', $field) !== 1) { |
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throw new InvalidArgumentException('Invalid field: ' . $field); |
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} |
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} |
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foreach ($fields as $field) { |
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$this->fields[strtolower($field)] = $field; |
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} |
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} |
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/** |
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* Remove field names from the field list. |
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* |
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* @param string ...$fields Field names to remove. |
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*/ |
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public function remove(string ...$fields): void |
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{ |
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foreach ($fields as $field) { |
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unset($this->fields[strtolower($field)]); |
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} |
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} |
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/** |
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* Remove all field names from the field list. |
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*/ |
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public function clear(): void |
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{ |
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$this->fields = []; |
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} |
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/** |
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* @return ArrayIterator<int, string> Iterator containing the field names in the field list. |
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*/ |
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3 |
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public function getIterator(): ArrayIterator |
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{ |
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return new ArrayIterator(array_values($this->fields)); |
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} |
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} |
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Stadly /
Http
