public function get_entries(ImsQtiReader $item, ImsQtiReader $interaction)
{
$result = array();
$sets = $interaction->list_simpleMatchSet();
if (count($sets) == 0) {
//associateInteraction
$questions = $this->get_choices($interaction);
$answers = array_merge($questions);
} else {
if (count($sets) == 1) {
//should not be the case
$questions = $this->get_choices($sets[0]);
$answers = array_merge($questions);
} else {
//matchInteraction
$questions = $this->get_choices($sets[0]);
$answers = $this->get_choices($sets[1]);
}
}
$done = array();
$responses = $this->get_correct_responses($item, $interaction);
foreach ($responses as $response) {
$pair = explode(' ', $response);
$question = isset($questions[$pair[0]]) ? $questions[$pair[0]] : null;
$answer = isset($answers[$pair[1]]) ? $answers[$pair[1]] : null;
if (!empty($question)) {
$result[] = $this->create_entry($question, $answer);
$done[$pair[1]] = $pair[1];
}
}
foreach ($answers as $key => $answer) {
if (!isset($done[$key])) {
$result[] = $this->create_entry(null, $answer);
}
}
return $result;
}
