public function attempt()
{
if (!env('student')) {
redirect('m=login');
}
$quizId = val($_REQUEST, 'id', -1);
$attemptId = val($_REQUEST, 'attemptId', -1);
$page = val($_REQUEST, 'page', 1);
$complete = val($_REQUEST, 'complete');
$pro = val($_REQUEST, 'pro');
if (!empty($pro)) {
env('modepro', true);
}
$now = date('Y-m-d H:i:s');
if (val(env('event'), 'instanceId') != $quizId) {
throw new Exception('Cannot fetch event', 404);
}
$quiz = entry_sql('SELECT * FROM quiz WHERE quizId=:quizId', array('quizId' => $quizId));
if (empty($quiz)) {
throw new Exception('Cannot find quiz "' . $id . '"', 404);
}
if ($attemptId == 0) {
// create new attempt
$attemptId = material::i('quiz')->startAttempt($quiz);
redirect('c=quiz&m=attempt&id=' . $quizId . '&attemptId=' . $attemptId);
}
$attempt = entry_sql('SELECT * FROM quiz_attempt WHERE quizAttemptId=:quizAttemptId AND quizId=:quizId AND studentId=:studentId', array('quizAttemptId' => $attemptId, 'quizId' => $quizId, 'studentId' => studentId()));
if (empty($attempt)) {
throw new Exception('Attempt "' . $attemptId . '" not found', 404);
}
if ($attempt['status'] != STATUS_INPROC) {
throw new Exception('Attempt is not available anymore', 403);
}
if (!empty($quiz['timeLimit']) && date('Y-m-d H:i:s', strtotime($attempt['timeStart']) + $quiz['timeLimit']) < $now) {
// if time expired
material::i('quiz')->finishAttempt($attemptId);
redirect('c=quiz&id=' . $quiz['quizId'] . '&eventId=' . val(env('event'), 'eventId'));
}
$questions = entries_sql('SELECT * FROM question_session WHERE quizAttemptId=:quizAttemptId ORDER BY num', array('quizAttemptId' => $attemptId));
$perpage = 1;
$numl = $page * $perpage;
$numf = $numl - $perpage;
$qresponses = val($_REQUEST, 'question', array());
foreach ($questions as &$qsess) {
$qobj = question::i($qsess['questionId']);
$qresponse = val($qresponses, $qsess['questionId']);
if (!empty($qresponse)) {
$qgrade = $qobj->get_grade($qresponse);
$qsess['grade'] = $qobj->get_grade($qresponse);
$qsess['response'] = json_encode($qresponse);
$qsess['status'] = STATUS_ANSWER;
entry_change('question_session', $qsess, array('questionSessionId' => $qsess['questionSessionId']));
entry_change('quiz_attempt', array('timeChange' => date('Y-m-d H:i:s')), array('quizAttemptId' => $attemptId));
}
if ($qsess['num'] > $numf && $qsess['num'] <= $numl) {
// render only questions of the page
$qsess['qhtml'] = $qobj->render(json_decode($qsess['response']));
}
$qsess['page'] = ceil($qsess['num'] / $perpage);
}
env('breadcrumbs', array_merge($this->_up_breadcrumbs(env('event')), array(lng('quiz:attempt'))));
if (!empty($complete)) {
material::i('quiz')->finishAttempt($attemptId);
trigger_exe('material.graded', array('quiz', $quizId, studentId()));
redirect('c=quiz&id=' . $quiz['quizId'] . '&eventId=' . val(env('event'), 'eventId'));
}
tpl('quiz/attempt', array('page' => $page, 'quiz' => $quiz, 'attempt' => $attempt, 'questions' => $questions));
}
