public function validation($data, $files)
{
$errors = parent::validation($data, $files);
$question = $this->_customdata;
// Inputs.
$inputnames = array();
foreach ($question->inputs as $inputname => $notused) {
$field = 'inputname_' . $inputname;
$proposedname = $data[$field];
if (!stack_utils::is_valid_name($proposedname)) {
$errors[$field] = stack_string('notavalidname');
} else {
if (array_key_exists($proposedname, $inputnames)) {
$errors[$field] = stack_string('namealreadyused');
} else {
$inputnames[$proposedname] = $inputname;
}
}
}
// PRTs.
$prtnames = array();
foreach ($question->prts as $prtname => $notused) {
$field = 'prtname_' . $prtname;
$proposedname = $data[$field];
if (!stack_utils::is_valid_name($proposedname)) {
$errors[$field] = stack_string('notavalidname');
} else {
if (array_key_exists($proposedname, $prtnames)) {
$errors[$field] = stack_string('namealreadyused');
} else {
$prtnames[$proposedname] = $prtname;
}
}
}
foreach ($question->prts as $prtname => $prt) {
$nodenames = array();
$nodes = $prt->get_nodes_summary();
foreach ($nodes as $nodekey => $notused) {
$field = 'nodename_' . $prtname . '_' . $nodekey;
$proposedname = $data[$field];
if ($proposedname < 1) {
$errors[$field] = stack_string('notavalidname');
} else {
if (array_key_exists($proposedname, $nodenames)) {
$errors[$field] = stack_string('namealreadyused');
} else {
$nodenames[$proposedname] = $nodekey;
}
}
}
}
return $errors;
}
