public function simpleValue($propertyName)
{
$query = 'PREFIX ' . $this->vocabulary->name . ': <' . $this->vocabulary->prefix . '> ' . 'SELECT ?' . $propertyName . ' ' . 'WHERE { ' . '<' . $this->url . '> ' . $this->vocabulary->name . ':' . $propertyName . ' ?' . $propertyName . ' ' . '}';
$result = $this->store->sparqlQuery($query);
if (!empty($result[0][$propertyName])) {
return $result[0][$propertyName];
}
return NULL;
}
/**
* Checks a given OpenID against the store and fetches the required informations.
*
* @param string $openId
* @return array
*/
protected function _checkOpenId($openId)
{
$retVal = array('userUri' => false, 'denyLogin' => false);
// Query the store.
require_once 'Erfurt/Sparql/SimpleQuery.php';
$query = new Erfurt_Sparql_SimpleQuery();
$query->setProloguePart('SELECT ?s ?p ?o');
$query->addFrom($this->_acModelUri);
$where = 'WHERE {
?s ?p ?o .
?s <' . EF_RDF_TYPE . '> <' . $this->_uris['user_class'] . "> .\n FILTER (sameTerm(?s, <{$openId}>))\n }";
$query->setWherePart($where);
$result = $this->_store->sparqlQuery($query, array('use_ac' => false));
foreach ((array) $result as $row) {
// Set user URI
if ($retVal['userUri'] === false) {
$retVal['userUri'] = $row['s'];
}
// Check predicates, whether needed.
switch ($row['p']) {
case $this->_uris['action_deny']:
// if login is disallowed
if ($row['o'] === $this->_uris['action_login']) {
$retVal['denyLogin'] = true;
}
break;
case EF_RDFS_LABEL:
$retVal['userLabel'] = $row['o'];
break;
case $this->_uris['user_username']:
$retVal['username'] = $row['o'];
break;
case $this->_uris['user_mail']:
$retVal['email'] = $row['o'];
default:
// Ignore all other statements.
}
}
return $retVal;
}
