public function startAttempt($quiz, $studentId = null)
{
db()->beginTransaction();
if (empty($studentId)) {
$studentId = studentId();
}
if (!empty($quiz['maxAttemptNum'])) {
$numAttemptsUsed = field_sql('SELECT COUNT(quizAttemptId) FROM quiz_attempt WHERE quizId=:quizId AND studentId=:studentId', array('quizId' => $quiz['quizId'], 'studentId' => $studentId));
if ($numAttemptsUsed >= $quiz['maxAttemptNum']) {
throw new Exception('Attempt limit consumed', 403);
}
}
$numAttemptsInproc = field_sql('SELECT COUNT(quizAttemptId) FROM quiz_attempt WHERE quizId=:quizId AND studentId=:studentId AND status=:status', array('quizId' => $quiz['quizId'], 'studentId' => $studentId, 'status' => STATUS_INPROC));
if ($numAttemptsInproc > 0) {
throw new Exception('Already started', 403);
}
entry_change('quiz_attempt', array('quizId' => $quiz['quizId'], 'studentId' => $studentId, 'status' => STATUS_INPROC, 'timeStart' => date('Y-m-d H:i:s')));
$attemptId = db()->lastInsertId();
$questions = entries_sql('SELECT questionId FROM question WHERE questionBaseId=:questionBaseId', array('questionBaseId' => $quiz['questionBaseId']));
if (empty($questions)) {
throw new Exception('Questions not found', 404);
}
shuffle($questions);
$num = 1;
foreach ($questions as $q) {
if (!empty($quiz['numQuestion']) && $num > $quiz['numQuestion']) {
break;
}
entry_change('question_session', array('num' => $num++, 'quizAttemptId' => $attemptId, 'questionId' => $q['questionId'], 'status' => STATUS_NEW));
}
db()->commit();
return $attemptId;
}
public function events()
{
if (!env('student')) {
redirect('m=login');
}
$updisciplineId = val($_REQUEST, 'updisciplineId');
$learningMode = val($_REQUEST, 'learningMode');
if (empty($updisciplineId) || empty($learningMode)) {
throw new Exception('Missed required param', 404);
}
$updiscipline = entry_sql('SELECT * FROM updiscipline WHERE updisciplineId=:updisciplineId', array(':updisciplineId' => $updisciplineId));
if (empty($updiscipline)) {
throw new Exception('Updiscipline not found', 404);
}
$groupPeriod = entry_sql('SELECT gp.* FROM group_history gh INNER JOIN group_period gp USING(groupPeriodId) WHERE gh.studentId=:studentId AND gp.sersemester=:sersemester', array('studentId' => studentId(), 'sersemester' => $updiscipline['sersemester']));
if (empty($groupPeriod)) {
throw new Exception('Cannot detect groupPeriod', 404);
}
$events = entries_sql('SELECT * FROM event WHERE updisciplineId=:updisciplineId AND groupPeriodId=:groupPeriodId AND learningMode=:learningMode', array('groupPeriodId' => $groupPeriod['groupPeriodId'], 'updisciplineId' => $updiscipline['updisciplineId'], 'learningMode' => $learningMode));
array_walk($events, function (&$event, $k, $studentId) {
$event['c'] = material::i($event['instanceType'])->c();
$event['grade'] = material::i($event['instanceType'])->get_grade($event['instanceId'], $studentId);
}, studentId());
env('breadcrumbs', array(array(lng('up:disciplines'), '/?c=up'), array($updiscipline['disciplineName'], '/?c=up&m=events&updisciplineId=' . $updisciplineId . '&learningMode=' . $learningMode), lng('up:events')));
tpl('up/events', array('updiscipline' => $updiscipline, 'events' => $events, 'result' => entry_sql('SELECT * FROM result WHERE studentId=:studentId AND updisciplineId=:updisciplineId AND learningMode=:learningMode', array('studentId' => studentId(), 'updisciplineId' => $updiscipline['updisciplineId'], 'learningMode' => $learningMode))));
}
public function __construct(array $extra = null)
{
$this->_extra = $extra;
if (studentId() && !env('student')) {
try {
env('student', entry_sql('SELECT * FROM student WHERE studentId=:studentId', array(':studentId' => studentId())));
} catch (Exception $e) {
// in some cases DB not initialized
}
}
env('css', array('base'));
}
public function login()
{
if (studentId()) {
redirect('c=up');
}
$login = val($_REQUEST, 'login');
$passw = val($_REQUEST, 'passw');
if (!empty($passw)) {
$studentId = field_sql('SELECT studentId FROM student WHERE login=:login AND passw=:passw', array('login' => $login, 'passw' => md5($passw)));
if (empty($studentId)) {
env('warning', lng('main:loginfailed'));
} else {
$_SESSION['studentId'] = $studentId;
redirect('c=up');
}
}
env('breadcrumbs', array(lng('main:loginpage')));
tpl('login_form', array('login' => $login, 'passw' => ''));
}
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));
}
