/**
* Update the duration built-in variable. The update will only take
* place if the current state of the item session is INTERACTING.
*
*/
public function updateDuration()
{
// If the current state is INTERACTING update duration built-in variable.
if ($this->getState() === AssessmentItemSessionState::INTERACTING) {
$timeRef = $this->getTimeReference();
$now = new DateTime('now', new DateTimeZone('UTC'));
$data =& $this->getDataPlaceHolder();
$diff = $timeRef->diff($now);
$data['duration']->getValue()->add($diff);
$this->setTimeReference($now);
foreach ($this->onDurationUpdate as $callBack) {
call_user_func_array($callBack, array($this, Duration::createFromDateInterval($diff)));
}
}
}
public function createFromDateInterval()
{
$interval = new DateInterval('PT5S');
$duration = Duration::createFromDateInterval($interval);
$this->assertEquals(5, $duration->getSeconds(true));
}
