forked from friendica/php-json-ld
Some code clean up/reorganization.
This commit is contained in:
Dave Longley
parent
265689c92f
commit
ae46860dab
318
jsonld.php
318
jsonld.php
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@ -208,7 +208,7 @@ class JsonLdProcessor {
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// remove empty contexts
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$tmp = $ctx;
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$ctx = array();
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foreach($tmp as $i => $v) {
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foreach($tmp as $v) {
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if(!is_object($v) || count(get_object_vars($v)) > 0) {
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$ctx[] = $v;
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}
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@ -436,7 +436,7 @@ class JsonLdProcessor {
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// FIXME: implement jsonld_resolve_url
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isset($options['resolver']) or $options['resolver'] = 'jsonld_resolve_url';
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// resolve URLs in localCtx
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// resolve URLs in local_ctx
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$local_ctx = self::copy($local_ctx);
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if(is_object($local_ctx) && !property_exists($local_ctx, '@context')) {
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$local_ctx = (object)array('@context' => $local_ctx);
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@ -744,13 +744,10 @@ class JsonLdProcessor {
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*
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* @param mixed $value the value.
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*
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* @return an array.
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* @return array an array.
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*/
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public static function arrayify($value) {
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if(is_array($value)) {
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return $value;
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}
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return array($value);
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return is_array($value) ? $value : array($value);
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}
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/**
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@ -967,161 +964,162 @@ class JsonLdProcessor {
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return $rval;
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}
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// recursively expand object
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if(is_object($element)) {
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// if element has a context, process it
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if(property_exists($element, '@context')) {
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$ctx = $this->_processContext($ctx, $element->{'@context'}, $options);
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unset($element->{'@context'});
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}
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$rval = new stdClass();
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foreach($element as $key => $value) {
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// expand property
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$prop = $this->_expandTerm($ctx, $key);
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// drop non-absolute IRI keys that aren't keywords
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if(!self::_isAbsoluteIri($prop) && !self::_isKeyword($prop, $ctx)) {
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continue;
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}
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// if value is null and property is not @value, continue
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$value = $element->{$key};
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if($value === null && $prop !== '@value') {
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continue;
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}
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// syntax error if @id is not a string
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if($prop === '@id' && !is_string($value)) {
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throw new JsonLdException(
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'Invalid JSON-LD syntax; "@id" value must a string.',
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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' => $value));
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}
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// @graph must be an array or an object
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if($prop === '@graph' && !(is_object($value) || is_array($value))) {
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throw new JsonLdException(
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'Invalid JSON-LD syntax; "@value" value must not be an ' +
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'object or an array.',
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'jsonld.SyntaxError', array('value' => $value));
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}
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// @value must not be an object or an array
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if($prop === '@value' && (is_object($value) || is_array($value))) {
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throw new JsonLdException(
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'Invalid JSON-LD syntax; "@value" value must not be an ' +
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'object or an array.',
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'jsonld.SyntaxError', array('value' => $value));
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}
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// @language must be a string
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if($prop === '@language' && !is_string($value)) {
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throw new JsonLdException(
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'Invalid JSON-LD syntax; "@language" value must not be a string.',
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'jsonld.SyntaxError', array('value' => $value));
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}
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// recurse into @list, @set, or @graph, keeping the active property
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$isList = ($prop === '@list');
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if($isList || $prop === '@set' || $prop === '@graph') {
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$value = $this->_expand($ctx, $property, $value, $options, $isList);
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if($isList && self::_isListValue($value)) {
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throw new JsonLdException(
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'Invalid JSON-LD syntax; lists of lists are not permitted.',
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'jsonld.SyntaxError');
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}
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}
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else {
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// update active property and recursively expand value
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$property = $key;
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$value = $this->_expand($ctx, $property, $value, $options, false);
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}
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// drop null values if property is not @value (dropped below)
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if($value !== null || $prop === '@value') {
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// convert value to @list if container specifies it
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if($prop !== '@list' && !self::_isListValue($value)) {
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$container = self::getContextValue($ctx, $property, '@container');
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if($container === '@list') {
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// ensure value is an array
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$value = (object)array('@list' => self::arrayify($value));
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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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$useArray = !($prop === '@id' || $prop === '@type' ||
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$prop === '@value' || $prop === '@language');
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self::addValue($rval, $prop, $value, $useArray);
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}
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}
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// get property count on expanded output
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$count = count(get_object_vars($rval));
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// @value must only have @language or @type
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if(property_exists($rval, '@value')) {
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if(($count === 2 && !property_exists($rval, '@type') &&
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!property_exists($rval, '@language')) ||
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$count > 2) {
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throw new JsonLdException(
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'Invalid JSON-LD syntax; an element containing "@value" must have ' +
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'at most one other property which can be "@type" or "@language".',
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'jsonld.SyntaxError', array('element' => $rval));
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}
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// value @type must be a string
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if(property_exists($rval, '@type') && !is_string($rval->{'@type'})) {
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throw new JsonLdException(
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'Invalid JSON-LD syntax; the "@type" value of an element ' +
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'containing "@value" must be a string.',
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'jsonld.SyntaxError', array('element' => $rval));
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}
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// return only the value of @value if there is no @type or @language
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else if($count === 1) {
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$rval = $rval->{'@value'};
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}
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// drop null @values
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else if($rval->{'@value'} === null) {
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$rval = null;
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}
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}
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// convert @type to an array
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else if(property_exists($rval, '@type') && !is_array($rval->{'@type'})) {
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$rval->{'@type'} = array($rval->{'@type'});
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}
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// handle @set and @list
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else if(property_exists($rval, '@set') ||
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property_exists($rval, '@list')) {
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if($count !== 1) {
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throw new JsonLdException(
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'Invalid JSON-LD syntax; if an element has the property "@set" ' +
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'or "@list", then it must be its only property.',
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'jsonld.SyntaxError', array('element' => $rval));
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}
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// optimize away @set
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if(property_exists($rval, '@set')) {
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$rval = $rval->{'@set'};
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}
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}
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// drop objects with only @language
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else if(property_exists($rval, '@language') && $count === 1) {
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$rval = null;
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}
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return $rval;
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// expand non-object element according to value expansion rules
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if(!is_object($element)) {
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return $this->_expandValue($ctx, $property, $element, $options['base']);
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}
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// expand element according to value expansion rules
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return $this->_expandValue($ctx, $property, $element, $options['base']);
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// Note: element must be an object, recursively expand it
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// if element has a context, process it
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if(property_exists($element, '@context')) {
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$ctx = $this->_processContext($ctx, $element->{'@context'}, $options);
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unset($element->{'@context'});
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}
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$rval = new stdClass();
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foreach($element as $key => $value) {
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// expand property
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$prop = $this->_expandTerm($ctx, $key);
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// drop non-absolute IRI keys that aren't keywords
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if(!self::_isAbsoluteIri($prop) && !self::_isKeyword($prop, $ctx)) {
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continue;
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}
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// if value is null and property is not @value, continue
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$value = $element->{$key};
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if($value === null && $prop !== '@value') {
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continue;
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}
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// syntax error if @id is not a string
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if($prop === '@id' && !is_string($value)) {
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throw new JsonLdException(
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'Invalid JSON-LD syntax; "@id" value must a string.',
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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' => $value));
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}
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// @graph must be an array or an object
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if($prop === '@graph' && !(is_object($value) || is_array($value))) {
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throw new JsonLdException(
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'Invalid JSON-LD syntax; "@value" value must not be an ' +
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'object or an array.',
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'jsonld.SyntaxError', array('value' => $value));
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}
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// @value must not be an object or an array
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if($prop === '@value' && (is_object($value) || is_array($value))) {
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throw new JsonLdException(
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'Invalid JSON-LD syntax; "@value" value must not be an ' +
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'object or an array.',
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'jsonld.SyntaxError', array('value' => $value));
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}
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// @language must be a string
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if($prop === '@language' && !is_string($value)) {
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throw new JsonLdException(
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'Invalid JSON-LD syntax; "@language" value must not be a string.',
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'jsonld.SyntaxError', array('value' => $value));
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}
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// recurse into @list, @set, or @graph, keeping the active property
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$isList = ($prop === '@list');
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if($isList || $prop === '@set' || $prop === '@graph') {
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$value = $this->_expand($ctx, $property, $value, $options, $isList);
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if($isList && self::_isListValue($value)) {
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throw new JsonLdException(
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'Invalid JSON-LD syntax; lists of lists are not permitted.',
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'jsonld.SyntaxError');
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}
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}
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else {
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// update active property and recursively expand value
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$property = $key;
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$value = $this->_expand($ctx, $property, $value, $options, false);
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}
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// drop null values if property is not @value (dropped below)
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if($value !== null || $prop === '@value') {
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// convert value to @list if container specifies it
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if($prop !== '@list' && !self::_isListValue($value)) {
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$container = self::getContextValue($ctx, $property, '@container');
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if($container === '@list') {
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// ensure value is an array
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$value = (object)array('@list' => self::arrayify($value));
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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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$useArray = !($prop === '@id' || $prop === '@type' ||
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$prop === '@value' || $prop === '@language');
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self::addValue($rval, $prop, $value, $useArray);
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}
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}
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// get property count on expanded output
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$count = count(get_object_vars($rval));
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// @value must only have @language or @type
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if(property_exists($rval, '@value')) {
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if(($count === 2 && !property_exists($rval, '@type') &&
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!property_exists($rval, '@language')) ||
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$count > 2) {
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throw new JsonLdException(
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'Invalid JSON-LD syntax; an element containing "@value" must have ' +
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'at most one other property which can be "@type" or "@language".',
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'jsonld.SyntaxError', array('element' => $rval));
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}
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// value @type must be a string
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if(property_exists($rval, '@type') && !is_string($rval->{'@type'})) {
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throw new JsonLdException(
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'Invalid JSON-LD syntax; the "@type" value of an element ' +
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'containing "@value" must be a string.',
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'jsonld.SyntaxError', array('element' => $rval));
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}
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// return only the value of @value if there is no @type or @language
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else if($count === 1) {
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$rval = $rval->{'@value'};
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}
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// drop null @values
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else if($rval->{'@value'} === null) {
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$rval = null;
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}
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}
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// convert @type to an array
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else if(property_exists($rval, '@type') && !is_array($rval->{'@type'})) {
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$rval->{'@type'} = array($rval->{'@type'});
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}
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// handle @set and @list
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else if(property_exists($rval, '@set') ||
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property_exists($rval, '@list')) {
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if($count !== 1) {
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throw new JsonLdException(
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'Invalid JSON-LD syntax; if an element has the property "@set" ' +
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'or "@list", then it must be its only property.',
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'jsonld.SyntaxError', array('element' => $rval));
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}
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// optimize away @set
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if(property_exists($rval, '@set')) {
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$rval = $rval->{'@set'};
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}
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}
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// drop objects with only @language
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else if(property_exists($rval, '@language') && $count === 1) {
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$rval = null;
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}
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return $rval;
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}
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/**
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