/**
* Retrieve the computed response analysis from the question_response_analysis table.
*
* @param \qubaid_condition $qubaids which attempts to get cached response analysis for.
* @return analysis_for_question|boolean analysis or false if no cached analysis found.
*/
public function load_cached($qubaids)
{
global $DB;
$timemodified = time() - self::TIME_TO_CACHE;
$rows = $DB->get_records_select('question_response_analysis', 'hashcode = ? AND questionid = ? AND timemodified > ?', array($qubaids->get_hash_code(), $this->questiondata->id, $timemodified));
if (!$rows) {
return false;
}
foreach ($rows as $row) {
$class = $this->analysis->get_subpart($row->subqid)->get_response_class($row->aid);
$class->add_response_and_count($row->response, $row->credit, $row->rcount);
}
return $this->analysis;
}
