/**
* Load a JSON-LD document
*
* The document can be supplied directly as string, by passing a file
* path, or by passing a URL.
*
* Usage:
* <code>
* $document = Processor::loadDocument('document.jsonld');
* print_r($document);
* </code>
*
* @param null|string|array|object $input The JSON-LD document or a path
* or URL pointing to one.
*
* @return mixed The loaded JSON-LD document
*
* @throws JsonLdException
*/
public static function loadDocument($input)
{
if (false === is_string($input)) {
// Return as is - it has already been parsed
return $input;
}
$document = FileGetContentsLoader::loadDocument($input);
return $document->document;
}
/**
* Expand a JSON-LD document
*
* The document can be supplied directly as string, by passing a file
* path, or by passing a URL.
*
* Usage:
*
* $expanded = JsonLD::expand('document.jsonld');
* print_r($expanded);
*
* It is possible to configure the expansion process by setting the options
* parameter accordingly. Available options are:
*
* <dl>
* <dt>base</dt>
* <dd>The base IRI of the input document.</dd>
*
* <dt>expandContext</dt>
* <dd>An optional context to use additionally to the context embedded
* in input when expanding the input.</dd>
* </dl>
*
* The options parameter might be passed as associative array or as
* object.
*
* @param string|object|array $input The JSON-LD document to expand.
* @param null|array|object $options Options to configure the expansion
* process.
*
* @return array The expanded JSON-LD document.
*
* @throws JsonLdException
*
* @api
*/
public static function expand($input, $options = null)
{
$options = self::mergeOptions($options);
$processor = new Processor($options);
$activectx = array('@base' => null);
if (is_string($input)) {
$remoteDocument = FileGetContentsLoader::loadDocument($input);
$input = $remoteDocument->document;
$activectx['@base'] = new IRI($remoteDocument->documentUrl);
if (null !== $remoteDocument->contextUrl) {
$processor->processContext($remoteDocument->contextUrl, $activectx);
}
}
if ($options->base) {
$activectx['@base'] = $options->base;
}
if (null !== $options->expandContext) {
$processor->processContext($options->expandContext, $activectx);
}
$processor->expand($input, $activectx);
// optimize away default graph (@graph as the only property at the top-level object)
if (is_object($input) && property_exists($input, '@graph') && 1 === count(get_object_vars($input))) {
$input = $input->{'@graph'};
}
if (false === is_array($input)) {
$input = null === $input ? array() : array($input);
}
return $input;
}