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<?php |
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namespace Subreality\Dilmun\Anshar\Http\UriParts; |
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/** |
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* Class Scheme |
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* @package Subreality\Dilmun\Anshar\Http\UriParts |
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*/ |
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class Scheme |
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{ |
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private static $valid_pattern = '/^[a-z][\w\+\-\.]*$/i'; |
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private $scheme = ""; |
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/** |
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* Scheme constructor. Accepts a string representing a URI scheme. Construction will throw an exception if the |
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* scheme is either not a string or does not conform to the RFC3986 URI scheme specification. |
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* |
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* scheme = ALPHA *( ALPHA / DIGIT / "+" / "-" / "." ) |
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* |
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* @see https://tools.ietf.org/html/rfc3986#appendix-A |
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* |
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* @throws \InvalidArgumentException |
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* |
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* @param string $scheme A string representing a URI scheme |
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*/ |
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public function __construct($scheme) |
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{ |
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if (!is_string($scheme)) { |
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throw new \InvalidArgumentException("Scheme must be a string"); |
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} elseif (!empty($scheme) && !$this->isValid($scheme)) { |
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throw new \InvalidArgumentException("Scheme must conform to RFC3986 specification"); |
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} |
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$this->scheme = $scheme; |
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} |
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public function __toString() |
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{ |
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return $this->scheme; |
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} |
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/** |
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* Determines whether a given scheme adheres to the RFC3986 specification: |
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* |
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* scheme = ALPHA *( ALPHA / DIGIT / "+" / "-" / "." ) |
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* |
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* @see https://tools.ietf.org/html/rfc3986#appendix-A |
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* @see Scheme::$valid_pattern |
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* |
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* @param string $scheme The scheme to check for validity |
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* @return bool Returns true if the provided scheme matches the RFC3986 specification |
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* Returns false otherwise |
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*/ |
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public static function isValid($scheme) |
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{ |
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return (bool) preg_match(self::$valid_pattern, $scheme); |
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} |
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public function toUriString() |
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{ |
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$uri_scheme = $this->scheme; |
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if (!empty($this->scheme)) { |
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$uri_scheme .= ":"; |
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} |
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return $uri_scheme; |
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} |
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} |
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twistofreality /
dilmun
