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<?php |
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namespace DataValues; |
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/** |
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* Class representing a IRI value. |
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* |
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* This code is based on the SMWDIUri class |
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* from Semantic MediaWiki, written by Markus Krötzsch. |
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* |
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* For info on IRI syntax, see https://en.wikipedia.org/wiki/URI_scheme#Generic_syntax |
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* |
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* @since 0.1 |
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* |
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* @licence GNU GPL v2+ |
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* @author Jeroen De Dauw < [email protected] > |
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*/ |
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class IriValue extends DataValueObject { |
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/** |
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* The URI scheme of the IRI. |
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* For instance "http", "ssh" or "mailto". |
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* |
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* @since 0.1 |
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* |
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* @var string |
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*/ |
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protected $scheme; |
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/** |
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* The hierarchical part of the IRI. |
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* Consists out of an authority and a path. |
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* For instance |
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* - //username:[email protected]:8042/over/there/index.dtb |
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* - //www.wikidata.org |
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* |
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* @since 0.1 |
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* |
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* @var string |
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*/ |
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protected $hierarchicalPart; |
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/** |
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* The query of the IRI. |
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* For instance type=animal&name=narwhal |
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* |
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* @since 0.1 |
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* |
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* @var string |
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*/ |
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protected $query; |
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/** |
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* The fragment of the IRI. |
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* For instance headerSection |
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* |
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* @since 0.1 |
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* |
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* @var string |
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*/ |
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protected $fragment; |
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/** |
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* @since 0.1 |
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* |
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* @param string $scheme |
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* @param string $hierarchicalPart |
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* @param string $query |
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* @param string $fragment |
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* |
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* @throws IllegalValueException |
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*/ |
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public function __construct( $scheme, $hierarchicalPart, $query = '', $fragment = '' ) { |
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foreach ( func_get_args() as $value ) { |
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if ( !is_string( $value ) ) { |
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throw new IllegalValueException( 'Can only construct IriValue from strings' ); |
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} |
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} |
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if ( $scheme === '' || preg_match( '/[^a-zA-Z]/u', $scheme ) ) { |
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throw new IllegalValueException( "Illegal URI scheme '$scheme'." ); |
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} |
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if ( $hierarchicalPart === '' ) { |
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throw new IllegalValueException( "Illegal URI hierarchical part '$hierarchicalPart'." ); |
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} |
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$this->scheme = $scheme; |
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$this->hierarchicalPart = $hierarchicalPart; |
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$this->query = $query; |
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$this->fragment = $fragment; |
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} |
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/** |
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* @see Serializable::serialize |
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* |
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* @since 0.1 |
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* |
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* @return string |
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*/ |
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public function serialize() { |
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return $this->getValue(); |
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} |
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/** |
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* @see Serializable::unserialize |
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* |
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* @since 0.1 |
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* |
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* @param string $value |
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* |
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* @return StringValue |
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*/ |
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public function unserialize( $value ) { |
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list( $scheme, $hierarchicalPart, $query, $fragment ) = self::getIriParts( $value ); |
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$this->__construct( $scheme, $hierarchicalPart, $query, $fragment ); |
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} |
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/** |
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* @see DataValue::getType |
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* |
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* @since 0.1 |
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* |
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* @return string |
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*/ |
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public static function getType() { |
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return 'iri'; |
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} |
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/** |
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* @see DataValue::getSortKey |
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* |
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* @since 0.1 |
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* |
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* @return string|float|int |
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*/ |
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public function getSortKey() { |
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return $this->getValue(); |
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} |
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/** |
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* Returns the string. |
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* @see DataValue::getValue |
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* |
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* @since 0.1 |
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* |
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* @return string |
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*/ |
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public function getValue() { |
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$uri = $this->scheme . ':' |
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. $this->hierarchicalPart |
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. ( $this->query ? '?' . $this->query : '' ) |
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. ( $this->fragment ? '#' . $this->fragment : '' ); |
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return $uri; |
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} |
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/** |
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* Returns the scheme or the IRI. |
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* |
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* @since 0.1 |
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* |
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* @return string |
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*/ |
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public function getScheme() { |
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return $this->scheme; |
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} |
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/** |
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* Returns the hierarchical part of the IRI. |
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* |
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* @since 0.1 |
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* |
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* @return string |
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*/ |
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public function getHierarchicalPart() { |
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return $this->hierarchicalPart; |
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} |
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/** |
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* Returns the query part of the IRI. |
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* |
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* @since 0.1 |
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* |
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* @return string |
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*/ |
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public function getQuery() { |
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return $this->query; |
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} |
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/** |
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* Returns the fragment part of the IRI. |
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* |
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* @since 0.1 |
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* |
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* @return string |
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*/ |
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public function getFragment() { |
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return $this->fragment; |
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} |
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/** |
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* @since 0.1 |
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* |
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* @param string $serialization |
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* |
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* @return array |
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* @throws IllegalValueException |
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*/ |
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public static function getIriParts( $serialization ) { |
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if ( !is_string( $serialization ) ) { |
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throw new IllegalValueException( 'IriValue::getIriParts expects a string value' ); |
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} |
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$parts = explode( ':', $serialization, 2 ); // try to split "schema:rest" |
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if ( count( $parts ) === 1 ) { |
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throw new IllegalValueException( "Unserialization failed: the string \"$serialization\" is no valid URI." ); |
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} |
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$scheme = $parts[0]; |
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$parts = explode( '?', $parts[1], 2 ); // try to split "hier-part?queryfrag" |
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if ( count( $parts ) == 2 ) { |
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$hierpart = $parts[0]; |
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$parts = explode( '#', $parts[1], 2 ); // try to split "query#frag" |
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$query = $parts[0]; |
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$fragment = count( $parts ) == 2 ? $parts[1] : ''; |
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} else { |
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$query = ''; |
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$parts = explode( '#', $parts[0], 2 ); // try to split "hier-part#frag" |
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$hierpart = $parts[0]; |
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$fragment = count( $parts ) == 2 ? $parts[1] : ''; |
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} |
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return array( $scheme, $hierpart, $query, $fragment ); |
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} |
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/** |
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* @see DataValue::getArrayValue |
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* |
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* @since 0.1 |
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* |
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* @return mixed |
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*/ |
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public function getArrayValue() { |
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return $this->getValue(); |
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} |
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/** |
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* Constructs a new instance of the DataValue from the provided data. |
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* This can round-trip with @see getArrayValue |
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* |
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* @since 0.1 |
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* |
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* @param mixed $data |
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* |
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* @return IriValue |
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* @throws IllegalValueException |
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*/ |
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public static function newFromArray( $data ) { |
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list( $scheme, $hierarchicalPart, $query, $fragment ) = self::getIriParts( $data ); |
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return new self( $scheme, $hierarchicalPart, $query, $fragment ); |
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} |
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} |