protected function buildResponseDeclaration($responseIdentifier, $validation)
{
$responseDeclaration = new ResponseDeclaration($responseIdentifier);
$responseDeclaration->setCardinality(Cardinality::MULTIPLE);
$responseDeclaration->setBaseType(BaseType::DIRECTED_PAIR);
/** @var clozeassociation_validation $validation */
$validationValues = $validation->get_valid_response()->get_value();
$validationScore = $validation->get_valid_response()->get_score();
// Build correct response
// Try to handle `null` values in `valid_response` `value`s
$values = new ValueCollection();
foreach ($validationValues as $index => $validResponse) {
if (!isset($this->possibleResponsesMap[$validResponse])) {
throw new MappingException('Invalid or missing missing valid response `' . $validResponse . '``');
}
if (!empty($validResponse)) {
$first = ClozeassociationMapper::GAP_IDENTIFIER_PREFIX . $index;
$second = ClozeassociationMapper::GAPCHOICE_IDENTIFIER_PREFIX . $this->possibleResponsesMap[$validResponse];
$values->attach(new Value(new QtiDirectedPair($first, $second)));
}
}
if ($values->count() > 0) {
$correctResponse = new CorrectResponse($values);
$responseDeclaration->setCorrectResponse($correctResponse);
}
return $responseDeclaration;
}
