/**
* @desc get a resource as RDF/JSON
*
* @param string modelIri
* @param string resourceIri
* @param string format
*
* @return string
*/
public function get($modelIri, $resourceIri, $format = 'rdfjson')
{
if (!$this->_store->isModelAvailable($modelIri)) {
return 'Error: Model "' . $modelIri . '" is not available.';
}
$editable = $this->_store->getModel($modelIri)->isEditable();
$supportedFormats = Erfurt_Syntax_RdfSerializer::getSupportedFormats();
if (!isset($supportedFormats[$format])) {
return 'Error: Format "' . $format . '" is not supported by serializer.';
}
$serializer = Erfurt_Syntax_RdfSerializer::rdfSerializerWithFormat($format);
// create hash for current status of resource
$currentDataHash = $this->_getCurrentResourceHash($modelIri, $resourceIri);
$return = new stdClass();
$return->dataHash = $currentDataHash;
$return->editable = $editable;
$return->data = $serializer->serializeResourceToString($resourceIri, $modelIri);
return $return;
}
/**
* Create the (context) menu for resource and fill it with its default entries
*/
private function _getResourceMenu($resource = null)
{
$owApp = OntoWiki::getInstance();
if ($resource === null) {
$resource = $owApp->selectedResource;
}
$config = $owApp->config;
$resourceMenu = new OntoWiki_Menu();
// Add the class Menu if the current resource is a class
$classMenu = $this->_getClassMenu($resource)->toArray();
foreach ($classMenu as $key => $value) {
$resourceMenu->appendEntry($key, $value);
}
if (count($classMenu) > 0) {
$resourceMenu->appendEntry(OntoWiki_Menu::SEPARATOR);
}
// View resource
$url = new OntoWiki_Url(array('action' => 'view'), array());
$url->setParam('r', $resource, true);
$resourceMenu->appendEntry('View Resource', (string) $url);
// Edit entries
if ($owApp->erfurt->getAc()->isModelAllowed('edit', $owApp->selectedModel)) {
// edit resource option
$resourceMenu->appendEntry('Edit Resource', 'javascript:editResourceFromURI(\'' . (string) $resource . '\')');
// Delete resource option
$url = new OntoWiki_Url(array('controller' => 'resource', 'action' => 'delete'), array());
$url->setParam('r', $resource, true);
$resourceMenu->appendEntry('Delete Resource', (string) $url);
}
$resourceMenu->appendEntry('Go to Resource (external)', (string) $resource);
$resourceMenu->appendEntry(OntoWiki_Menu::SEPARATOR);
foreach (Erfurt_Syntax_RdfSerializer::getSupportedFormats() as $key => $format) {
$resourceMenu->appendEntry('Export Resource as ' . $format, $config->urlBase . 'resource/export/f/' . $key . '?r=' . urlencode($resource));
}
return $resourceMenu;
}
public function exportAction()
{
$this->_addLastModifiedHeader();
$this->_helper->viewRenderer->setNoRender();
$this->_helper->layout->disableLayout();
if (isset($this->_request->m)) {
$modelUri = $this->_request->m;
} else {
if (isset($this->_owApp->selectedModel)) {
$modelUri = $this->_owApp->selectedModel->getModelUri();
} else {
$response = $this->getResponse();
$response->setRawHeader('HTTP/1.0 400 Bad Request');
throw new OntoWiki_Controller_Exception("No model given.");
}
}
$resource = $this->getParam('r', true);
// Check whether the f parameter is given. If not: default to rdf/xml
if (!isset($this->_request->f)) {
$format = 'rdfxml';
} else {
$format = $this->_request->f;
}
$format = Erfurt_Syntax_RdfSerializer::normalizeFormat($format);
$store = $this->_erfurt->getStore();
// Check whether given format is supported. If not: 400 Bad Request.
if (!in_array($format, array_keys(Erfurt_Syntax_RdfSerializer::getSupportedFormats()))) {
$response = $this->getResponse();
$response->setRawHeader('HTTP/1.0 400 Bad Request');
throw new OntoWiki_Controller_Exception("Format '{$format}' not supported.");
}
// Check whether model exists. If not: 404 Not Found.
if (!$store->isModelAvailable($modelUri, false)) {
$response = $this->getResponse();
$response->setRawHeader('HTTP/1.0 404 Not Found');
throw new OntoWiki_Controller_Exception("Model '{$modelUri}' not found.");
}
// Check whether model is available (with acl). If not: 403 Forbidden.
if (!$store->isModelAvailable($modelUri)) {
$response = $this->getResponse();
$response->setRawHeader('HTTP/1.0 403 Forbidden');
throw new OntoWiki_Controller_Exception("Model '{$modelUri}' not available.");
}
$filename = 'export' . date('Y-m-d_Hi');
switch ($format) {
case 'rdfxml':
$contentType = 'application/rdf+xml';
$filename .= '.rdf';
break;
case 'rdfn3':
$contentType = 'text/rdf+n3';
$filename .= '.n3';
break;
case 'rdfjson':
$contentType = 'application/json';
$filename .= '.json';
break;
case 'turtle':
$contentType = 'application/x-turtle';
$filename .= '.ttl';
break;
}
/*
* Event: allow for adding / deleting statements to the export
* event uses a memory model and gets an empty memory model as
* default value, all plugins should add statements to the existing
* value and should not create a new model as return value
*/
$event = new Erfurt_Event('beforeExportResource');
$event->resource = $resource;
$event->modelUri = $modelUri;
$event->setDefault = new Erfurt_Rdf_MemoryModel();
$addedModel = $event->trigger();
if (is_object($addedModel) && get_class($addedModel) == 'Erfurt_Rdf_MemoryModel') {
$addedStatements = $addedModel->getStatements();
} else {
$addedStatements = array();
}
$response = $this->getResponse();
$response->setHeader('Content-Type', $contentType, true);
$response->setHeader('Content-Disposition', 'filename="' . $filename . '"');
$serializer = Erfurt_Syntax_RdfSerializer::rdfSerializerWithFormat($format);
echo $serializer->serializeResourceToString($resource, $modelUri, false, true, $addedStatements);
}
/**
* Serializes a given model or (if supported) all models into a given format.
*/
public function exportAction()
{
if (!$this->_owApp->erfurt->getAc()->isActionAllowed(Erfurt_Ac_Default::ACTION_MODEL_EXPORT)) {
$this->_owApp->appendMessage(new OntoWiki_Message('Model export not allowed.', OntoWiki_Message::ERROR));
$this->_redirect($_SERVER['HTTP_REFERER'], array('code' => 302));
return;
}
// Check whether the f parameter is given. If not: default to rdf/xml
if (!isset($this->_request->f)) {
$format = 'rdfxml';
} else {
$format = $this->_request->f;
}
$format = Erfurt_Syntax_RdfSerializer::normalizeFormat($format);
$store = $this->_erfurt->getStore();
// Check whether given format is supported. If not: 400 Bad Request.
if (!in_array($format, array_keys(Erfurt_Syntax_RdfSerializer::getSupportedFormats()))) {
$response = $this->getResponse();
$response->setRawHeader('HTTP/1.0 400 Bad Request');
throw new OntoWiki_Controller_Exception("Format '{$format}' not supported.");
}
// Check whether a model uri is given
if (isset($this->_request->m)) {
$modelUri = $this->_request->m;
// Check whether model exists. If not: 404 Not Found.
if (!$store->isModelAvailable($modelUri, false)) {
$response = $this->getResponse();
$response->setRawHeader('HTTP/1.0 404 Not Found');
throw new OntoWiki_Controller_Exception("Model '{$modelUri}' not found.");
}
// Check whether model is available (with acl). If not: 403 Forbidden.
if (!$store->isModelAvailable($modelUri)) {
$response = $this->getResponse();
$response->setRawHeader('HTTP/1.0 403 Forbidden');
throw new OntoWiki_Controller_Exception("Model '{$modelUri}' not available.");
}
$filename = 'export' . date('Y-m-d_Hi');
switch ($format) {
case 'rdfxml':
$contentType = 'application/rdf+xml';
$filename .= '.rdf';
break;
case 'rdfn3':
$contentType = 'text/rdf+n3';
$filename .= '.n3';
break;
case 'rdfjson':
$contentType = 'application/json';
$filename .= '.json';
break;
case 'turtle':
$contentType = 'application/x-turtle';
$filename .= '.ttl';
break;
}
$this->_helper->viewRenderer->setNoRender();
$this->_helper->layout->disableLayout();
$response = $this->getResponse();
$response->setHeader('Content-Type', $contentType, true);
$response->setHeader('Content-Disposition', 'filename="' . $filename . '"');
$serializer = Erfurt_Syntax_RdfSerializer::rdfSerializerWithFormat($format);
echo $serializer->serializeGraphToString($modelUri);
return;
} else {
// Else use all available models.
// TODO Exporters need to support this feature...
$response = $this->getResponse();
$response->setRawHeader('HTTP/1.0 400 Bad Request');
throw new OntoWiki_Controller_Exception("No Graph URI given.");
}
}
