/**
* QTISM endTestSession method overriding.
*
* It consists of including an additional processing when the test ends,
* in order to send the LtiOutcome
*
* @see http://www.imsglobal.org/lis/ Outcome Management Service
* @throws taoQtiTest_helpers_TestSessionException If the session is already ended or if an error occurs whil transmitting/processing the result.
*/
public function endTestSession()
{
$sessionMemento = $this->getSessionMemento();
parent::endTestSession();
common_Logger::i('Ending test session.');
try {
// Compute the LtiOutcome variable for LTI support.
$this->setVariable(new OutcomeVariable('LtiOutcome', Cardinality::SINGLE, BaseType::FLOAT, new QtiFloat(0.0)));
$outcomeProcessingEngine = new OutcomeProcessingEngine($this->buildLtiOutcomeProcessing(), $this);
$outcomeProcessingEngine->process();
// if numberPresented returned 0, division by 0 -> null.
$testUri = $this->getTest()->getUri();
$var = $this->getVariable('LtiOutcome');
$varIdentifier = $var->getIdentifier();
common_Logger::t("Submitting test result '{$varIdentifier}' related to test '{$testUri}'.");
$this->getResultTransmitter()->transmitTestVariable($var, $this->getSessionId(), $testUri);
$this->unsetVariable('LtiOutcome');
} catch (ProcessingException $e) {
$msg = "An error occured while processing the 'LtiOutcome' outcome variable.";
throw new taoQtiTest_helpers_TestSessionException($msg, taoQtiTest_helpers_TestSessionException::RESULT_SUBMISSION_ERROR, $e);
} catch (taoQtiCommon_helpers_ResultTransmissionException $e) {
$msg = "An error occured during test-level outcome results transmission.";
throw new taoQtiTest_helpers_TestSessionException($msg, taoQtiTest_helpers_TestSessionException::RESULT_SUBMISSION_ERROR, $e);
}
$this->triggerEventChange($sessionMemento);
}
