public static function getBody($dataObj) { // Query parameters $query_string = ''; if (!empty($_GET)) { $get_params = \Input::get(); foreach ($get_params as $param => $val) { if (!empty($val)) { $query_string .= "&{$param}={$val}"; } } if (!empty($query_string)) { $query_string = trim($query_string, '&'); $query_string = '?' . $query_string; } } // Links to pages $prev_link = ''; $next_link = ''; if (!empty($dataObj->paging)) { $input_array = array_except(\Input::get(), array('limit', 'offset')); $query_string = ''; if (!empty($input_array)) { foreach ($get_params as $param => $val) { if (!empty($val)) { $query_string .= "&{$param}={$val}"; } } if (!empty($query_string)) { $query_string = trim($query_string, '&'); $query_string = '?' . $query_string; } } if (!empty($dataObj->paging['previous'])) { $prev_link = '?offset=' . $dataObj->paging['previous'][0] . '&limit=' . $dataObj->paging['previous'][1] . $query_string; } if (!empty($dataObj->paging['next'])) { $next_link = '?offset=' . $dataObj->paging['next'][0] . '&limit=' . $dataObj->paging['next'][1] . $query_string; } } // Create the link to the dataset $dataset_link = \URL::to($dataObj->definition['collection_uri'] . "/" . $dataObj->definition['resource_name'], [], \Config::get('app.ssl_enabled')); // Append rest parameters if (!empty($dataObj->rest_parameters)) { $dataset_link .= '/' . implode('/', $dataObj->rest_parameters); } if (!empty($dataObj->source_definition)) { $type = $dataObj->source_definition['type']; // Check if other views need to be served switch ($type) { case 'XLS': case 'CSV': $first_row = array_shift($dataObj->data); array_unshift($dataObj->data, $first_row); if (is_array($first_row) || is_object($first_row)) { $view = 'dataset.tabular'; $data = $dataObj->data; } else { $view = 'dataset.code'; $data = self::displayTree($dataObj->data); } break; case 'KML': case 'SHP': $view = 'dataset.map'; $data = $dataset_link . '.map' . $query_string; break; case 'XML': $view = 'dataset.code'; $data = self::displayTree($dataObj->data, 'xml'); break; case 'INSPIRE': $view = 'dataset.inspire'; $definitions = \App::make('Tdt\\Core\\Repositories\\Interfaces\\DefinitionRepositoryInterface'); $properties = $definitions->getCreateParameters(); $data = ['properties' => $properties]; break; case 'REMOTE': $view = 'dataset.remote'; $definitions = \App::make('Tdt\\Core\\Repositories\\Interfaces\\DefinitionRepositoryInterface'); $properties = $definitions->getCreateParameters(); $data = ['properties' => $properties]; break; default: if ($dataObj->is_semantic) { // This data object is always semantic $view = 'dataset.turtle'; // Check if a configuration is given $conf = array(); if (!empty($dataObj->semantic->conf)) { $conf = $dataObj->semantic->conf; } $data = $dataObj->data->serialise('turtle'); } elseif ($type == 'SPARQL' && $dataObj->source_definition['query_type'] == 'select') { $data = CSVFormatter::buildTableFromSparqlResult($dataObj->data); $first_row = array_shift($data); array_unshift($data, $first_row); if (is_array($first_row) || is_object($first_row)) { $view = 'dataset.tabular'; $data = $data; } } else { $view = 'dataset.code'; $data = self::displayTree($dataObj->data); } break; } } elseif ($dataObj->is_semantic) { // The data object can be semantic without a specified source type $view = 'dataset.code'; $data = $dataObj->data->serialise('turtle'); } else { // Collection view $view = 'dataset.collection'; $data = $dataObj->data; } // Gather meta-data to inject as a JSON-LD document so it can be picked up by search engines $definition = $dataObj->definition; $uri = \Request::root(); $graph = new Graph(); // Create the dataset uri $dataset_uri = $uri . "/" . $definition['collection_uri'] . "/" . $definition['resource_name']; $dataset_uri = str_replace(' ', '%20', $dataset_uri); // Add the dataset resource and its description $graph->addResource($dataset_uri, 'a', 'schema:Dataset'); // Add the title to the dataset resource of the catalog if (!empty($definition['title'])) { $graph->addLiteral($dataset_uri, 'schema:headline', $definition['title']); } // Add the description, identifier, issues, modified of the dataset $graph->addLiteral($dataset_uri, 'schema:description', @$definition['description']); $graph->addLiteral($dataset_uri, 'schema:dateCreated', date(\DateTime::ISO8601, strtotime($definition['created_at']))); $graph->addLiteral($dataset_uri, 'schema:dateModified', date(\DateTime::ISO8601, strtotime($definition['updated_at']))); // Add the publisher resource to the dataset if (!empty($definition['publisher_name']) && !empty($definition['publisher_uri'])) { $graph->addResource($dataset_uri, 'schema:publisher', $definition['publisher_uri']); } // Optional dct terms $optional = array('date', 'language'); $languages = \App::make('Tdt\\Core\\Repositories\\Interfaces\\LanguageRepositoryInterface'); $licenses = \App::make('Tdt\\Core\\Repositories\\Interfaces\\LicenseRepositoryInterface'); foreach ($optional as $dc_term) { if (!empty($definition[$dc_term])) { if ($dc_term == 'language') { $lang = $languages->getByName($definition[$dc_term]); if (!empty($lang)) { $graph->addResource($dataset_uri, 'schema:inLanguage', 'http://lexvo.org/id/iso639-3/' . $lang['lang_id']); } } else { $graph->addLiteral($dataset_uri, 'schema:datasetTimeInterval', $definition[$dc_term]); } } } // Add the distribution of the dataset for SEO $format = '.json'; if ($definition['source_type'] == 'ShpDefinition' || $dataObj->source_definition['type'] == 'KML') { $format = '.geojson'; } $dataDownload = $graph->newBNode(); $graph->addResource($dataset_uri, 'schema:distribution', $dataDownload); $graph->addResource($dataDownload, 'a', 'schema:DataDownload'); $graph->addResource($dataDownload, 'schema:contentUrl', $dataset_uri . $format); // Add the license to the distribution if (!empty($definition['rights'])) { $license = $licenses->getByTitle($definition['rights']); if (!empty($license) && !empty($license['url'])) { $graph->addResource($dataset_uri, 'schema:license', $license['url']); } if (!empty($license)) { $dataObj->definition['rights_uri'] = $license['url']; } } $jsonld = $graph->serialise('jsonld'); // Render the view return \View::make($view)->with('title', 'Dataset: ' . $dataObj->definition['collection_uri'] . "/" . $dataObj->definition['resource_name'] . ' | The Datatank')->with('body', $data)->with('page_title', $dataObj->definition['collection_uri'] . "/" . $dataObj->definition['resource_name'])->with('definition', $dataObj->definition)->with('paging', $dataObj->paging)->with('source_definition', $dataObj->source_definition)->with('formats', $dataObj->formats)->with('dataset_link', $dataset_link)->with('prev_link', $prev_link)->with('next_link', $next_link)->with('query_string', $query_string)->with('json_ld', $jsonld); }
/** * Transforms the statements of a StatementIterator instance into a stream, a file for instance. * * @param StatementIterator $statements The StatementIterator containing all the Statements which * should be serialized by the serializer. * @param string|resource $outputStream filename or file pointer to the stream to where the serialization * should be written. * @param string $serialization The serialization which should be used. If null is given the * serializer will either apply some default serialization, or * the only one it is supporting, or will throw an Exception. * @throws \Exception If unknown serilaization was given. */ public function serializeIteratorToStream(StatementIterator $statements, $outputStream, $serialization = null) { /* * check parameter $outputStream */ if (is_resource($outputStream)) { // use it as it is } elseif (is_string($outputStream)) { $outputStream = fopen($outputStream, 'w'); } else { throw new \Exception('Parameter $outputStream is neither a string nor resource.'); } // if no format was given, serialize to turtle. if (null == $serialization) { $format = 'turtle'; } if (false === isset($this->serializationMap[$serialization])) { throw new \Exception('Unknown serialization given: ' . $serialization); } $graph = new Graph(); // go through all statements foreach ($statements as $statement) { /* * Handle subject */ $stmtSubject = $statement->getSubject(); if ($stmtSubject->isNamed()) { $s = $stmtSubject->getUri(); } elseif ($stmtSubject->isBlank()) { $s = $stmtSubject->getBlankId(); } else { throw new \Exception('Subject can either be a blank node or an URI.'); } /* * Handle predicate */ $stmtPredicate = $statement->getPredicate(); if ($stmtPredicate->isNamed()) { $p = $stmtPredicate->getUri(); } else { throw new \Exception('Predicate can only be an URI.'); } /* * Handle object */ $stmtObject = $statement->getObject(); if ($stmtObject->isNamed()) { $o = array('type' => 'uri', 'value' => $stmtObject->getUri()); } elseif ($stmtObject->isBlank()) { $o = array('type' => 'bnode', 'value' => $stmtObject->getBlankId()); } elseif ($stmtObject->isLiteral()) { $o = array('type' => 'literal', 'value' => $stmtObject->getValue()); } else { throw new \Exception('Object can either be a blank node, an URI or literal.'); } $graph->add($s, $p, $o); } fwrite($outputStream, $graph->serialise($this->serializationMap[$serialization]) . PHP_EOL); }
/** * @return object|array|scalar */ public function getResult() { return $this->graph->serialise($this->format, $this->options); }