public static function getBody($dataObj)
{
if ($dataObj->is_semantic) {
// Check if a configuration is given
$conf = array();
if (!empty($dataObj->semantic->conf)) {
$conf = $dataObj->semantic->conf;
foreach ($conf['ns'] as $prefix => $uri) {
\EasyRdf_Namespace::set($prefix, $uri);
}
}
// Add the configured ontology prefixes
$ontologies = \App::make('Tdt\\Core\\Repositories\\Interfaces\\OntologyRepositoryInterface');
$context = array();
// Only add the common namespaces
$namespaces = array('hydra', 'rdf', 'rdfs', 'foaf', 'void', 'xsd', 'skos', 'xs');
foreach ($namespaces as $ns) {
$namespace = $ontologies->getByPrefix($ns);
if (!empty($namespace)) {
$context[$ns] = $namespace['uri'];
}
}
$output = $dataObj->data->serialise('jsonld');
// Next, encode the context as JSON
$jsonContext = json_encode($context);
// Compact the JsonLD by using @context -> Needs tweaking can only return the
// URI spaces that are used in the document.
$compacted = JsonLD::compact($output, $jsonContext);
// Print the resulting JSON-LD!
return JsonLD::toString($compacted, true);
} else {
\App::abort(400, "The data is not a semantically linked document, a linked data JSON representation is not possible.");
}
}
/**
* Retrieve the latest RDFA version of schema.org and converts it to JSON-LD.
*
* Note: caches the file in data and retrieves it from there as long as it exists.
*/
private function getJSONVersionOfSchema()
{
// Set cachefile
$cacheFile = dirname(dirname(__DIR__)) . '/data/schemaorg.cache';
if (!file_exists($cacheFile)) {
// Create dir
if (!file_exists(dirname($cacheFile))) {
mkdir(dirname($cacheFile), 0777, true);
}
// Load RDFA Schema
$graph = new \EasyRdf_Graph(self::RDFA_SCHEMA);
$graph->load(self::RDFA_SCHEMA, 'rdfa');
// Lookup the output format
$format = \EasyRdf_Format::getFormat('jsonld');
// Serialise to the new output format
$output = $graph->serialise($format);
if (!is_scalar($output)) {
$output = var_export($output, true);
}
$this->schema = \ML\JsonLD\JsonLD::compact($graph->serialise($format), 'http://schema.org/');
// Write cache file
file_put_contents($cacheFile, serialize($this->schema));
} else {
$this->schema = unserialize(file_get_contents($cacheFile));
}
}
/**
* Tests the compaction API
*
* @group compaction
*/
public function testCompaction()
{
$path = dirname(__FILE__) . DIRECTORY_SEPARATOR . 'Fixtures' . DIRECTORY_SEPARATOR;
$expected = json_decode(file_get_contents($path . 'sample-compacted.jsonld'));
$input = $path . 'sample-in.jsonld';
$context = $path . 'sample-context.jsonld';
$this->assertJsonEquals($expected, JsonLD::compact($input, $context), 'Passing the file path');
$input = file_get_contents($input);
$context = file_get_contents($context);
$this->assertJsonEquals($expected, JsonLD::compact($input, $context), 'Passing the raw input (string)');
$input = json_decode($input);
$context = json_decode($context);
$this->assertJsonEquals($expected, JsonLD::compact($input, $context), 'Passing the parsed object');
}
/**
* Convert a list of L10nResources in a JSON-LD file
* @param array(L10nResources) $l10nResourceList
* @return string : JSON-LD document
*/
public function convertL10nResourceList(array $l10nResourceList)
{
$quadList = array();
$c = 0;
if (count($l10nResourceList)) {
foreach ($l10nResourceList as $l10nResource) {
$bNode = new IRI('_' . $c);
$quadList[] = new Quad($bNode, new IRI(self::NS . 'key'), new IRI($l10nResource->getIdResource()));
$quadList[] = new Quad($bNode, new IRI(self::NS . 'localization'), new IRI($l10nResource->getIdLocalization()));
$valueList = $l10nResource->getValueList();
foreach ($valueList as $locale => $value) {
if (!is_int($locale)) {
$value .= '@' . $locale;
}
$quadList[] = new Quad($bNode, new IRI(self::NS . 'value'), new TypedValue($value, RdfConstants::XSD_STRING));
}
$c++;
}
}
$jsonLd = JsonLD::fromRdf($quadList);
$compacted = JsonLD::compact($jsonLd, '{"@context": {"l10n" : "' . self::NS . '"}}', array('compactArrays' => false));
return JsonLD::toString($compacted, true);
}
/**
* Update a dataset
*
* @param $id integer The id of the dataset
* @param $config array The configuration that makes up the dataset
*
* @return void
*/
public function update($id, $config)
{
$uri = \URL::to('/users/' . $id);
// Find the graph in the collection
$graph = $this->get($id . '#agent');
$context = $this->getContext();
if (empty($graph)) {
return null;
}
foreach ($this->getFields() as $field) {
$domain = $field['domain'];
if ($domain == 'foaf:Agent') {
$resource = $graph->resource($uri . "#agent");
$graph->delete($resource, $field['short_sem_term']);
if ($field['single_value'] && in_array($field['type'], ['string', 'text', 'list'])) {
if (filter_var(trim($config[$field['var_name']]), FILTER_VALIDATE_URL)) {
$graph->addResource($resource, $field['sem_term'], trim($config[$field['var_name']]));
} else {
$graph->add($resource, $field['sem_term'], trim($config[$field['var_name']]));
}
} else {
if (!$field['single_value'] && in_array($field['type'], ['string', 'list'])) {
if (!empty($config[$field['var_name']])) {
foreach ($config[$field['var_name']] as $val) {
if (filter_var($val, FILTER_VALIDATE_URL)) {
$graph->addResource($resource, $field['sem_term'], $val);
} else {
$graph->add($resource, $field['sem_term'], $val);
}
}
}
}
}
}
}
// Delete the json entry and replace it with the updated one
$collection = $this->getMongoCollection();
$serializer = new \EasyRdf_Serialiser_JsonLd();
$jsonld = $serializer->serialise($graph, 'jsonld');
$compact_document = (array) JsonLD::compact($jsonld, $context);
$collection->remove(['@id' => $uri . '#agent']);
$collection->insert($compact_document);
}
/**
* @param \EasyRdf\Graph $graph
* @param string $format
* @param array $options
*
* @throws Exception
* @return string
*/
public function serialise($graph, $format, array $options = array())
{
parent::checkSerialiseParams($graph, $format);
if ($format != 'jsonld') {
throw new Exception(__CLASS__ . ' does not support: ' . $format);
}
$ld_graph = new LD\Graph();
$nodes = array();
// cache for id-to-node association
foreach ($graph->toRdfPhp() as $resource => $properties) {
if (array_key_exists($resource, $nodes)) {
$node = $nodes[$resource];
} else {
$node = $ld_graph->createNode($resource);
$nodes[$resource] = $node;
}
foreach ($properties as $property => $values) {
foreach ($values as $value) {
if ($value['type'] == 'bnode' or $value['type'] == 'uri') {
if (array_key_exists($value['value'], $nodes)) {
$_value = $nodes[$value['value']];
} else {
$_value = $ld_graph->createNode($value['value']);
$nodes[$value['value']] = $_value;
}
} elseif ($value['type'] == 'literal') {
if (isset($value['lang'])) {
$_value = new LD\LanguageTaggedString($value['value'], $value['lang']);
} elseif (isset($value['datatype'])) {
$_value = new LD\TypedValue($value['value'], $value['datatype']);
} else {
$_value = $value['value'];
}
} else {
throw new Exception("Unable to serialise object to JSON-LD: " . $value['type']);
}
if ($property == "http://www.w3.org/1999/02/22-rdf-syntax-ns#type") {
$node->addType($_value);
} else {
$node->addPropertyValue($property, $_value);
}
}
}
}
// OPTIONS
$use_native_types = !(isset($options['expand_native_types']) and $options['expand_native_types'] == true);
$should_compact = (isset($options['compact']) and $options['compact'] == true);
$should_frame = isset($options['frame']);
// expanded form
$data = $ld_graph->toJsonLd($use_native_types);
if ($should_frame) {
$data = LD\JsonLD::frame($data, $options['frame'], $options);
}
if ($should_compact) {
// compact form
$compact_context = isset($options['context']) ? $options['context'] : null;
$compact_options = array('useNativeTypes' => $use_native_types, 'base' => $graph->getUri());
$data = LD\JsonLD::compact($data, $compact_context, $compact_options);
}
return LD\JsonLD::toString($data);
}
/**
* Download a concept as json-ld or redirect to download the whole vocabulary.
* @param Request $request
* @return object json-ld formatted concept.
*/
public function data($request)
{
$vocab = $request->getVocab();
$format = $request->getQueryParam('format');
if ($request->getUri()) {
$uri = $request->getUri();
} else {
if ($vocab !== null) {
// whole vocabulary - redirect to download URL
$urls = $vocab->getDataURLs();
if (sizeof($urls) == 0) {
return $this->returnError('404', 'Not Found', "No download source URL known for vocabulary {$vocab}");
}
$format = $this->negotiateFormat(array_keys($urls), $request->getServerConstant('HTTP_ACCEPT'), $format);
if (!$format) {
return $this->returnError(406, 'Not Acceptable', "Unsupported format. Supported MIME types are: " . implode(' ', array_keys($urls)));
}
header("Location: " . $urls[$format]);
return;
} else {
return $this->returnError(400, 'Bad Request', "uri parameter missing");
}
}
$format = $this->negotiateFormat(explode(' ', self::$SUPPORTED_MIME_TYPES), $request->getServerConstant('HTTP_ACCEPT'), $format);
if (!$format) {
return $this->returnError(406, 'Not Acceptable', "Unsupported format. Supported MIME types are: " . self::$SUPPORTED_MIME_TYPES);
}
$vocid = $vocab ? $vocab->getId() : null;
$results = $this->model->getRDF($vocid, $uri, $format);
if ($format == 'application/ld+json' || $format == 'application/json') {
// further compact JSON-LD document using a context
$context = array('skos' => 'http://www.w3.org/2004/02/skos/core#', 'isothes' => 'http://purl.org/iso25964/skos-thes#', 'rdfs' => 'http://www.w3.org/2000/01/rdf-schema#', 'owl' => 'http://www.w3.org/2002/07/owl#', 'dct' => 'http://purl.org/dc/terms/', 'dc11' => 'http://purl.org/dc/elements/1.1/', 'uri' => '@id', 'type' => '@type', 'lang' => '@language', 'value' => '@value', 'graph' => '@graph', 'label' => 'rdfs:label', 'prefLabel' => 'skos:prefLabel', 'altLabel' => 'skos:altLabel', 'hiddenLabel' => 'skos:hiddenLabel', 'broader' => 'skos:broader', 'narrower' => 'skos:narrower', 'related' => 'skos:related', 'inScheme' => 'skos:inScheme');
$compact_jsonld = \ML\JsonLD\JsonLD::compact($results, json_encode($context));
$results = \ML\JsonLD\JsonLD::toString($compact_jsonld);
}
header("Content-type: {$format}; charset=utf-8");
echo $results;
}
/**
* Tests compaction.
*
* @param string $name The test name.
* @param object $test The test definition.
* @param object $options The options to configure the algorithms.
*
* @group compaction
* @dataProvider compactionProvider
*/
public function testCompaction($name, $test, $options)
{
$expected = json_decode(file_get_contents($this->basedir . $test->{'expect'}));
$result = JsonLD::compact($this->basedir . $test->{'input'}, $this->basedir . $test->{'context'}, $options);
$this->assertJsonEquals($expected, $result);
}
/**
* Update a dataset
*
* @param $id integer The id of the dataset
* @param $config array The configuration that makes up the dataset
*
* @return void
*/
public function update($id, $config)
{
$uri = \URL::to('/datasets/' . $id);
// Find the graph in the collection
$graph = $this->get($id);
$context = $this->getContext();
if (empty($graph)) {
return null;
}
// Add the contributor
$graph->addLiteral($uri, 'http://purl.org/dc/terms/contributor', \URL::to('/users/' . strtolower(str_replace(" ", "", $config['user']))));
foreach ($this->getFields() as $field) {
$type = $field['domain'];
if ($type == 'dcat:Dataset') {
$resource = $graph->resource($uri . "#dataset");
} else {
if ($type == 'dcat:CatalogRecord') {
$resource = $graph->resource($uri);
}
}
$graph->delete($resource, $field['short_sem_term']);
if ($field['single_value'] && in_array($field['type'], ['string', 'text', 'list'])) {
if (filter_var(trim($config[$field['var_name']]), FILTER_VALIDATE_URL)) {
$graph->addResource($resource, $field['sem_term'], trim($config[$field['var_name']]));
} else {
$graph->add($resource, $field['sem_term'], trim($config[$field['var_name']]));
}
} else {
if (!$field['single_value'] && in_array($field['type'], ['string', 'list'])) {
if (!empty($config[$field['var_name']])) {
foreach ($config[$field['var_name']] as $val) {
if (filter_var($val, FILTER_VALIDATE_URL)) {
$graph->addResource($resource, $field['sem_term'], $val);
} else {
$graph->add($resource, $field['sem_term'], $val);
}
}
}
}
}
}
foreach ($graph->allOfType('dcat:Distribution') as $distribution) {
$resource = $graph->resource($uri . "#dataset");
$graph->deleteResource($resource, 'dcat:distribution', $distribution->getUri());
}
// Add the distribution resource
foreach ($config['distributions'] as $distribution) {
$id = $this->getIncrementalId();
$distr_uri = $uri . '#distribution' . $id;
$distributionResource = $graph->resource($distr_uri);
$distributionResource->addType('dcat:Distribution');
if (!empty($distribution['license'])) {
$graph->addResource($distributionResource, 'dct:license', $distribution['license']);
}
if (!empty($distribution['usecases'])) {
foreach ($distribution['usecases'] as $usecase) {
$graph->addResource($distributionResource, 'linda:useFor', $usecase);
}
}
// Add the distribution to the dataset
$graph->addResource($uri . "#dataset", 'dcat:distribution', $distr_uri);
}
// Delete the json entry and replace it with the updated one
$collection = $this->getMongoCollection();
$serializer = new \EasyRdf_Serialiser_JsonLd();
$jsonld = $serializer->serialise($graph, 'jsonld');
$compact_document = (array) JsonLD::compact($jsonld, $context);
$collection->remove(['@graph' => ['$elemMatch' => ['@id' => $uri]]]);
$collection->insert($compact_document);
}
/**
* Shows a train or train data, based on the accept-header.
* @param $station_id
* @param $liveboard_id
* @return array
* @throws EasyRdf_Exception
*/
public function specificTrain($station_id, $liveboard_id)
{
$negotiator = new \Negotiation\FormatNegotiator();
$acceptHeader = Request::header('accept');
$priorities = array('application/json', 'text/html', '*/*');
$result = $negotiator->getBest($acceptHeader, $priorities);
$val = $result->getValue();
//get the right date-time to query
$datetime = substr($liveboard_id, 0, 12);
$datetime = strtotime($datetime);
$archived = false;
if ($datetime < strtotime("now")) {
$archived = true;
}
switch ($val) {
case "text/html":
// Convert id to string for interpretation by old API
$stationStringName = \hyperRail\StationString::convertToString($station_id);
if (!$archived) {
// Set up path to old api
$URL = "http://api.irail.be/liveboard/?station=" . urlencode($stationStringName->name) . "&date=" . date("mmddyy", $datetime) . "&time=" . date("Hi", $datetime) . "&fast=true&lang=nl&format=json";
// Get the contents of this path
$data = file_get_contents($URL);
// Convert the data to the new liveboard object
$newData = \hyperRail\FormatConverter::convertLiveboardData($data, $station_id);
// Read new liveboard object and return the page but load data
foreach ($newData['@graph'] as $graph) {
if (strpos($graph['@id'], $liveboard_id) !== false) {
return View::make('stations.departuredetail')->with('station', $graph)->with('departureStation', $stationStringName);
}
}
App::abort(404);
} else {
// If no match is found, attempt to look in the archive
// Fetch file using curl
$ch = curl_init("http://archive.irail.be/" . 'irail?subject=' . urlencode('http://irail.be/stations/NMBS/' . $station_id . '/departures/' . $liveboard_id));
curl_setopt($ch, CURLOPT_HEADER, 0);
$request_headers[] = 'Accept: text/turtle';
curl_setopt($ch, CURLOPT_HTTPHEADER, $request_headers);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$turtle = curl_exec($ch);
curl_close($ch);
// Convert turtle to json-ld
// Create a new graph
$graph = new EasyRdf_Graph();
if (empty($_REQUEST['data'])) {
// Load the sample information
$graph->parse($turtle, 'turtle');
}
// Export to JSON LD
$format = EasyRdf_Format::getFormat('jsonld');
$output = $graph->serialise($format);
if (!is_scalar($output)) {
$output = var_export($output, true);
}
// First, define the context
$context = array("delay" => "http://semweb.mmlab.be/ns/rplod/delay", "platform" => "http://semweb.mmlab.be/ns/rplod/platform", "scheduledDepartureTime" => "http://semweb.mmlab.be/ns/rplod/scheduledDepartureTime", "headsign" => "http://vocab.org/transit/terms/headsign", "routeLabel" => "http://semweb.mmlab.be/ns/rplod/routeLabel", "stop" => array("@id" => "http://semweb.mmlab.be/ns/rplod/stop", "@type" => "@id"), "seeAlso" => array("@id" => "http://www.w3.org/2000/01/rdf-schema#seeAlso", "@type" => "@id"));
// Next, encode the context as JSON
$jsonContext = json_encode($context);
// Compact the JsonLD by using @context
$compacted = JsonLD::compact($output, $jsonContext);
// Print the resulting JSON-LD!
$urlToFind = 'NMBS/' . $station_id . '/departures/' . $liveboard_id;
$stationDataFallback = json_decode(JsonLD::toString($compacted, true));
foreach ($stationDataFallback->{'@graph'} as $graph) {
if (strpos($graph->{'@id'}, $urlToFind) !== false) {
return View::make('stations.departurearchive')->with('station', $graph)->with('departureStation', $stationStringName);
}
}
App::abort(404);
}
break;
case "application/json":
case "application/ld+json":
default:
$stationStringName = \hyperRail\StationString::convertToString($station_id);
if (!$archived) {
$URL = "http://api.irail.be/liveboard/?station=" . urlencode($stationStringName->name) . "&date=" . date("mmddyy", $datetime) . "&time=" . date("Hi", $datetime) . "&fast=true&lang=nl&format=json";
$data = file_get_contents($URL);
$newData = \hyperRail\FormatConverter::convertLiveboardData($data, $station_id);
foreach ($newData['@graph'] as $graph) {
if (strpos($graph['@id'], $liveboard_id) !== false) {
$context = array("delay" => "http://semweb.mmlab.be/ns/rplod/delay", "platform" => "http://semweb.mmlab.be/ns/rplod/platform", "scheduledDepartureTime" => "http://semweb.mmlab.be/ns/rplod/scheduledDepartureTime", "headsign" => "http://vocab.org/transit/terms/headsign", "routeLabel" => "http://semweb.mmlab.be/ns/rplod/routeLabel", "stop" => array("@id" => "http://semweb.mmlab.be/ns/rplod/stop", "@type" => "@id"));
return array("@context" => $context, "@graph" => $graph);
}
}
App::abort(404);
} else {
// If no match is found, attempt to look in the archive
// Fetch file using curl
$ch = curl_init("http://archive.irail.be/" . 'irail?subject=' . urlencode('http://irail.be/stations/NMBS/' . $station_id . '/departures/' . $liveboard_id));
curl_setopt($ch, CURLOPT_HEADER, 0);
$request_headers[] = 'Accept: text/turtle';
curl_setopt($ch, CURLOPT_HTTPHEADER, $request_headers);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$turtle = curl_exec($ch);
curl_close($ch);
// Convert turtle to json-ld
// Create a new graph
$graph = new EasyRdf_Graph();
if (empty($_REQUEST['data'])) {
// Load the sample information
$graph->parse($turtle, 'turtle');
}
// Export to JSON LD
$format = EasyRdf_Format::getFormat('jsonld');
$output = $graph->serialise($format);
if (!is_scalar($output)) {
$output = var_export($output, true);
}
// First, define the context
$context = array("delay" => "http://semweb.mmlab.be/ns/rplod/delay", "platform" => "http://semweb.mmlab.be/ns/rplod/platform", "scheduledDepartureTime" => "http://semweb.mmlab.be/ns/rplod/scheduledDepartureTime", "headsign" => "http://vocab.org/transit/terms/headsign", "routeLabel" => "http://semweb.mmlab.be/ns/rplod/routeLabel", "stop" => array("@id" => "http://semweb.mmlab.be/ns/rplod/stop", "@type" => "@id"), "seeAlso" => array("@id" => "http://www.w3.org/2000/01/rdf-schema#seeAlso", "@type" => "@id"));
// Next, encode the context as JSON
$jsonContext = json_encode($context);
// Compact the JsonLD by using @context
$compacted = JsonLD::compact($output, $jsonContext);
// Print the resulting JSON-LD!
$urlToFind = 'NMBS/' . $station_id . '/departures/' . $liveboard_id;
$stationDataFallback = json_decode(JsonLD::toString($compacted, true));
foreach ($stationDataFallback->{'@graph'} as $graph) {
if (strpos($graph->{'@id'}, $urlToFind) !== false) {
return array("@context" => $context, "@graph" => $graph);
}
}
App::abort(404);
}
break;
}
}
