public function convert(BaseQuestionType $question, $interactionIdentifier, $interactionLabel)
{
/** @var choicematrix $question */
// Is multiple response ?
$isMultipleResponses = !empty($question->get_multiple_responses()) ? $question->get_multiple_responses() : false;
$optionCount = count($question->get_options());
$stemCount = count($question->get_stems());
// Append the two sets of choices, the first set defines the source choices and the second set the targets
$simpleMatchCollection = new SimpleMatchSetCollection();
list($stemCollection, $stemIndexIdentifierMap) = $this->buildStemCollection($question, $isMultipleResponses, $optionCount);
list($optionCollection, $optionIndexIdentifierMap) = $this->buildOptionCollection($question, $stemCount);
$simpleMatchCollection->attach(new SimpleMatchSet($stemCollection));
$simpleMatchCollection->attach(new SimpleMatchSet($optionCollection));
// Build the interaction
$interaction = new MatchInteraction($interactionIdentifier, $simpleMatchCollection);
$interaction->setPrompt($this->convertStimulusForPrompt($question->get_stimulus()));
$interaction->setLabel($interactionLabel);
$interaction->setShuffle(false);
// No support for shuffling
// If multiple response set then student is allowed to put 1 association (tick 1 box) or (optionCount * stemCount) association (tick all the boxes)
$interaction->setMaxAssociations($isMultipleResponses ? $optionCount * $stemCount : $stemCount);
$interaction->setMinAssociations($isMultipleResponses ? 1 : $stemCount);
$builder = new ChoicematrixValidationBuilder($stemIndexIdentifierMap, $optionIndexIdentifierMap);
list($responseDeclaration, $responseProcessing) = $builder->buildValidation($interactionIdentifier, $question->get_validation());
return [$interaction, $responseDeclaration, $responseProcessing];
}
