public function go()
{
$this->setViewTemplate('classmembership.tpl');
$user_id = $_GET['id'];
$user = User::getUser($user_id);
if (isset($_POST['submit'])) {
$class_id = $_POST['class_id'];
if (ClassMemberships::doesMembershipExist($user_id, $class_id)) {
$this->addErrorMessage("User is already a member of this class");
} else {
ClassMemberships::addMembership($user_id, $class_id);
$this->addSuccessMessage("User has been added to the class succesfully");
}
} elseif (isset($_GET['action']) && $_GET['action'] == "del") {
$class_id = $_GET['class_id'];
ClassMemberships::deleteMembership($user_id, $class_id);
$this->addSuccessMessage("User has been deleted from the class succesfully");
}
$class_memberships = ClassMemberships::getMembershipsOfUser($user_id);
$classes = Classes::getAllClasses();
$this->addToView('classes', $classes);
$this->addToView('class_memberships', $class_memberships);
$this->addToView('user', $user);
$this->setViewTemplate('classmembership.tpl');
$this->generateView();
}
protected static function isAllowed($username, $challenge_id)
{
$user = User::findByUserName($username);
$classes = ClassMemberships::getMembershipsOfUser($user->id);
return ClassChallenges::isAllowed($challenge_id, $classes);
}
