forked from friendica/php-json-ld
Update to latest spec changes.
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parent
0e6040c9e1
commit
2135f34a72
170
jsonld.php
170
jsonld.php
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@ -838,7 +838,7 @@ class JsonLdProcessor {
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// compact subject references
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if(self::_isSubjectReference($element)) {
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$type = self::getContextValue($ctx, $property, '@type');
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if($type === '@id') {
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if($type === '@id' || $property === '@graph') {
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$element = $this->_compactIri($ctx, $element->{'@id'});
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return $element;
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}
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@ -1000,14 +1000,9 @@ class JsonLdProcessor {
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'jsonld.SyntaxError', array('value' => $value));
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}
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// @type must be a string, array of strings, or an empty JSON object
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if($prop === '@type' &&
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!(is_string($value) || self::_isArrayOfStrings($value) ||
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self::_isEmptyObject($value))) {
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throw new JsonLdException(
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'Invalid JSON-LD syntax; "@type" value must a string, an array ' +
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'of strings, or an empty object.',
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'jsonld.SyntaxError', array('value' => $value));
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// validate @type value
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if($prop === '@type') {
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$this->_validateTypeValue($value);
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}
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// @graph must be an array or an object
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@ -1060,6 +1055,25 @@ class JsonLdProcessor {
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}
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}
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// optimize away @id for @type
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if($prop === '@type') {
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if(self::_isSubjectReference($value)) {
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$value = $value->{'@id'};
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}
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else if(is_array($value)) {
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$val = array();
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foreach($value as $v) {
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if(self::_isSubjectReference($v)) {
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$val[] = $v->{'@id'};
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}
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else {
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$val[] = $v;
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}
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}
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$value = $val;
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}
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}
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// add value, use an array if not @id, @type, @value, or @language
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$use_array = !($prop === '@id' || $prop === '@type' ||
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$prop === '@value' || $prop === '@language');
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@ -1363,8 +1377,8 @@ class JsonLdProcessor {
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// get type definition from context
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$type = self::getContextValue($ctx, $property, '@type');
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// do @id expansion
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if($type === '@id') {
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// do @id expansion (automatic for @graph)
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if($type === '@id' || $prop === '@graph') {
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$rval = (object)array('@id' => $this->_expandTerm($ctx, $value, $base));
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}
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// other type
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@ -2427,11 +2441,6 @@ class JsonLdProcessor {
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return $iri;
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}
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// compact rdf:type
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if($iri === self::RDF_TYPE) {
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return '@type';
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}
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// term is a keyword
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if(self::_isKeyword($iri)) {
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// return alias if available
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@ -2656,8 +2665,12 @@ class JsonLdProcessor {
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'jsonld.SyntaxError', array('context' => $ctx));
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}
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// expand @id to full IRI
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$id = $this->_expandContextIri($active_ctx, $ctx, $id, $base, $defined);
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// expand @id if it is not @type
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if($id !== '@type') {
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// expand @id to full IRI
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$id = $this->_expandContextIri(
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$active_ctx, $ctx, $id, $base, $defined);
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}
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// add @id to mapping
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$mapping->{'@id'} = $id;
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@ -3022,24 +3035,24 @@ class JsonLdProcessor {
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/**
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* Returns whether or not the given value is a keyword (or a keyword alias).
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*
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* @param string $value the value to check.
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* @param string $v the value to check.
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* @param stdClass [$ctx] the active context to check against.
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*
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* @return bool true if the value is a keyword, false if not.
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*/
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protected static function _isKeyword($value, $ctx=null) {
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protected static function _isKeyword($v, $ctx=null) {
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if($ctx !== null) {
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if(property_exists($ctx->keywords, $value)) {
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if(property_exists($ctx->keywords, $v)) {
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return true;
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}
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foreach($ctx->keywords as $kw => $aliases) {
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if(in_array($value, $aliases) !== false) {
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if(in_array($v, $aliases) !== false) {
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return true;
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}
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}
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}
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else {
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switch($value) {
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switch($v) {
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case '@context':
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case '@container':
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case '@default':
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@ -3061,125 +3074,136 @@ class JsonLdProcessor {
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}
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/**
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* Returns true if the given input is an empty Object.
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* Returns true if the given value is an empty Object.
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*
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* @param mixed $input the input to check.
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* @param mixed $v the value to check.
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*
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* @return bool true if the input is an empty Object, false if not.
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* @return bool true if the value is an empty Object, false if not.
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*/
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protected static function _isEmptyObject($input) {
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return is_object($input) && count(get_object_vars($input)) === 0;
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protected static function _isEmptyObject($v) {
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return is_object($v) && count(get_object_vars($v)) === 0;
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}
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/**
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* Returns true if the given input is an Array of Strings.
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* Throws an exception if the given value is not a valid @type value.
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*
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* @param mixed $input the input to check.
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*
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* @return bool true if the input is an Array of Strings, false if not.
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* @param mixed $v the value to check.
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*/
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protected static function _isArrayOfStrings($input) {
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if(!is_array($input)) {
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return false;
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protected static function _validateTypeValue($v) {
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// must be a string, subject reference, or empty object
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if(is_string($v) || self::_isSubjectReference($v) ||
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self::_isEmptyObject($v)) {
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return;
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}
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foreach($input as $v) {
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if(!is_string($v)) {
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return false;
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// must be an array
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$is_valid = false;
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if(is_array($v)) {
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$is_valid = true;
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foreach($v as $e) {
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if(!(is_string($e) || self::_isSubjectReference($e))) {
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$is_valid = false;
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break;
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}
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}
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}
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return true;
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if(!$is_valid) {
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throw new JsonLdException(
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'Invalid JSON-LD syntax; "@type" value must a string, an array ' +
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'of strings, or an empty object.',
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'jsonld.SyntaxError', array('value' => $v));
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}
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}
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/**
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* Returns true if the given value is a subject with properties.
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*
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* @param mixed $value the value to check.
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* @param mixed $v the value to check.
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*
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* @return bool true if the value is a subject with properties, false if not.
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*/
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protected static function _isSubject($value) {
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$rval = false;
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protected static function _isSubject($v) {
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// Note: A value is a subject if all of these hold true:
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// 1. It is an Object.
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// 2. It is not a @value, @set, or @list.
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// 3. It has more than 1 key OR any existing key is not @id.
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if(is_object($value) &&
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!property_exists($value, '@value') &&
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!property_exists($value, '@set') &&
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!property_exists($value, '@list')) {
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$count = count(get_object_vars($value));
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$rval = ($count > 1 || !property_exists($value, '@id'));
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$rval = false;
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if(is_object($v) &&
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!property_exists($v, '@value') &&
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!property_exists($v, '@set') &&
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!property_exists($v, '@list')) {
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$count = count(get_object_vars($v));
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$rval = ($count > 1 || !property_exists($v, '@id'));
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}
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return $rval;
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}
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/**
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* Returns true if the given value is a subject reference.
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*
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* @param mixed $value the value to check.
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* @param mixed $v the value to check.
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*
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* @return bool true if the value is a subject reference, false if not.
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*/
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protected static function _isSubjectReference($value) {
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protected static function _isSubjectReference($v) {
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// Note: A value is a subject reference if all of these hold true:
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// 1. It is an Object.
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// 2. It has a single key: @id.
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return (is_object($value) && count(get_object_vars($value)) === 1 &&
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property_exists($value, '@id'));
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return (is_object($v) && count(get_object_vars($v)) === 1 &&
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property_exists($v, '@id'));
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}
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/**
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* Returns true if the given value is a @value.
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*
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* @param mixed $value the value to check.
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* @param mixed $v the value to check.
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*
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* @return bool true if the value is a @value, false if not.
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*/
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protected static function _isValue($value) {
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protected static function _isValue($v) {
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// Note: A value is a @value if all of these hold true:
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// 1. It is an Object.
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// 2. It has the @value property.
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return is_object($value) && property_exists($value, '@value');
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return is_object($v) && property_exists($v, '@value');
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}
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/**
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* Returns true if the given value is a @list.
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*
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* @param mixed $value the value to check.
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* @param mixed $v the value to check.
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*
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* @return bool true if the value is a @list, false if not.
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*/
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protected static function _isList($value) {
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protected static function _isList($v) {
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// Note: A value is a @list if all of these hold true:
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// 1. It is an Object.
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// 2. It has the @list property.
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return is_object($value) && property_exists($value, '@list');
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return is_object($v) && property_exists($v, '@list');
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}
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/**
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* Returns true if the given value is a blank node.
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*
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* @param mixed $value the value to check.
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* @param mixed $v the value to check.
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*
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* @return bool true if the value is a blank node, false if not.
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*/
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protected static function _isBlankNode($value) {
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$rval = false;
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protected static function _isBlankNode($v) {
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// Note: A value is a blank node if all of these hold true:
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// 1. It is an Object.
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// 2. If it has an @id key its value begins with '_:'.
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// 3. It has no keys OR is not a @value, @set, or @list.
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if(is_object($value)) {
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if(property_exists($value, '@id')) {
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$rval = (strpos($value->{'@id'}, '_:') === 0);
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$rval = false;
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if(is_object($v)) {
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if(property_exists($v, '@id')) {
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$rval = (strpos($v->{'@id'}, '_:') === 0);
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}
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else {
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$rval = (count(get_object_vars($value)) === 0 ||
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!(property_exists($value, '@value') ||
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property_exists($value, '@set') ||
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property_exists($value, '@list')));
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$rval = (count(get_object_vars($v)) === 0 ||
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!(property_exists($v, '@value') ||
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property_exists($v, '@set') ||
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property_exists($v, '@list')));
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}
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}
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return $rval;
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@ -3188,12 +3212,12 @@ class JsonLdProcessor {
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/**
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* Returns true if the given value is an absolute IRI, false if not.
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*
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* @param string $value the value to check.
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* @param string $v the value to check.
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*
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* @return bool true if the value is an absolute IRI, false if not.
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*/
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protected static function _isAbsoluteIri($value) {
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return strpos($value, ':') !== false;
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protected static function _isAbsoluteIri($v) {
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return strpos($v, ':') !== false;
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}
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}
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