/**
* Deletes a program assignment activity
*
* Deletes all database records, files and calendar events for this assignment.
*
* @param object $assignment The assignment to be deleted
* @return boolean False indicates error
*/
function delete_instance($assignment)
{
global $CFG, $DB;
// delete onlinejudge submissions
$submissions = $DB->get_records('assignment_submissions', array('assignment' => $assignment->id));
foreach ($submissions as $submission) {
if (!$DB->delete_records('assignment_oj_submissions', array('submission' => $submission->id))) {
return false;
}
}
// delete testcases
// parent will delete all files in this context
if (!$DB->delete_records('assignment_oj_testcases', array('assignment' => $assignment->id))) {
return false;
}
// delete onlinejudge settings
if (!$DB->delete_records('assignment_oj', array('assignment' => $assignment->id))) {
return false;
}
// inform judgelib to delete related tasks
$cm = get_coursemodule_from_instance('assignment', $assignment->id);
if (!onlinejudge_delete_coursemodule($cm->id)) {
return false;
}
$result = parent::delete_instance($assignment);
return $result;
}
