/**
* Create a full structured test
*
* @access public
*
* @param $data id node
* @return the relative nodes structure or an AMA_Error object
*/
public static function readTest($id_nodo, $dh = null)
{
if (is_null($dh)) {
$dh = $GLOBALS['dh'];
}
//check if $id_nodo param is an integer and retrieve rows from database
if (intval($id_nodo) > 0) {
$id_nodo = intval($id_nodo);
$data = $dh->test_getNodesByRadix($id_nodo);
if (AMA_DataHandler::isError($data)) {
return $data;
} else {
$objects = array();
$root = null;
//ciclying all rows to instantiate and attach nodes to form a three
//the external loop is used to catch all the nodes that doesn't find a father on first tries
while (!empty($data)) {
foreach ($data as $k => $v) {
$tipo = $v['tipo'][0];
$parent = $v['id_nodo_parent'];
$id = $v['id_nodo'];
//this search the root
if (is_null($root) && ($tipo == ADA_TYPE_TEST || $tipo == ADA_TYPE_SURVEY)) {
$objects[$id] = NodeTest::readNode($v);
$root = $objects[$id];
self::$nodesArray[$root->id_nodo] = $root;
//once the row is attach, it can be deleted
unset($data[$k]);
} else {
if (!is_null($parent) && isset($objects[$parent])) {
$objects[$id] = NodeTest::readNode($v, $objects[$parent]);
$objects[$parent]->addChild($objects[$id]);
//once the row is attach, it can be deleted
unset($data[$k]);
}
}
}
}
//free resources
unset($objects);
//if $root is still null, the test doesn't exists!
if (is_null($root)) {
return new AMA_Error(AMA_ERR_INCONSISTENT_DATA);
} else {
return $root;
}
}
} else {
return new AMA_Error(AMA_ERR_WRONG_ARGUMENTS);
}
}
