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."); } }
/** * Serializes data in the appropriate format * * @param mixed $data any data * @param string $format format name * @param array $context options normalizers/encoders have access to * * @return string */ public function serialize($data, $format, array $context = array()) { if ('jsonld' !== $format) { throw new UnexpectedValueException('Serialization for the format ' . $format . ' is not supported'); } if (false === is_object($data)) { throw new \Exception('Only objects can be serialized'); } return JsonLD::toString($this->doSerialize($data, true), true); }
/** * 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); }
/** * @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); }
} ], "@embedChildren": false, "supportedProperties": { "@default": [ ], "@embed": true }, "supportedOperations": { "@default": [ ], "@embed": true, "expects": { "@default": null, "@embed": false }, "statusCodes": { "@default": [], "@embed": true } } } '; $document = JsonLD::toString(JsonLD::frame(JsonLD::expand($document, $options), $frame)); $headers['Content-Type'] = 'application/ld+json'; } catch (Exception $e) { $exceptionName = get_class($e); if (false !== ($pos = strrpos(get_class($e), '\\'))) { $exceptionName = substr($exceptionName, $pos + 1); } header('HTTP/1.1 400 ' . $exceptionName); //Bad Request'); print htmlspecialchars($e->getMessage()); die; } }; $proxy = new AjaxProxy(); if ($debug) { $proxy->setResponseModifier($debugExpansion);
/** * 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; }
/** * Constructor. * * @param string $code The error code * @param string $message The error message * @param mixed $snippet The code snippet * @param string $document The document that triggered the error * @param Exception $previous The previous exception */ public function __construct($code, $message = null, $snippet = null, $document = null, \Exception $previous = null) { $this->code = $code; $this->document = $document; $this->snippet = $snippet ? JsonLD::toString($snippet) : $snippet; $this->rawMessage = $message; $this->updateMessage(); parent::__construct($this->message, 0, $previous); }
/** * 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; } }