/**
* Handle's the page request
*
*/
public function handle_request()
{
global $DB, $USER, $PAGE;
// first check if there are questions or not. If there are no questions display that message instead,
// regardless of action.
if (count($this->RTQ->get_questionmanager()->get_questions()) === 0) {
$this->pagevars['action'] = 'noquestions';
$this->pageurl->param('action', '');
// remove the action
}
switch ($this->pagevars['action']) {
case 'noquestions':
$this->RTQ->get_renderer()->view_header();
$this->RTQ->get_renderer()->no_questions($this->RTQ->is_instructor());
$this->RTQ->get_renderer()->view_footer();
break;
case 'quizstart':
// case for the quiz start landing page
// set the quiz view page to the base layout for 1 column layout
$PAGE->set_pagelayout('base');
if ($this->session->get_session() === false) {
// redirect them to the default page with a quick message first
$redirurl = clone $this->pageurl;
$redirurl->remove_params('action');
redirect($redirurl, get_string('nosession', 'activequiz'), 5);
} else {
// this is here to help prevent race conditions for multiple group members trying to take the
// quiz at the same time
$cantakequiz = false;
if ($this->RTQ->group_mode()) {
if (!$this->RTQ->is_instructor() && $this->pagevars['group'] == 0) {
print_error('invalidgroupid', 'mod_activequiz');
}
// check if the user can take the quiz for the group
if ($this->session->can_take_quiz_for_group($this->pagevars['group'])) {
$cantakequiz = true;
}
} else {
// if no group mode, user will always be able to take quiz
$cantakequiz = true;
}
if ($cantakequiz) {
if (!$this->session->init_attempts($this->RTQ->is_instructor(), $this->pagevars['group'], $this->pagevars['groupmembers'])) {
print_error('cantinitattempts', 'activequiz');
}
// set the session as running
if ($this->RTQ->is_instructor() && $this->session->get_session()->status == 'notrunning') {
$this->session->set_status('running');
}
// get the current attempt an initialize the head contributions
$attempt = $this->session->get_open_attempt();
$attempt->get_html_head_contributions();
$attempt->setStatus('inprogress');
// now show the quiz start landing page
$this->RTQ->get_renderer()->view_header(true);
$this->RTQ->get_renderer()->render_quiz($attempt, $this->session);
$this->RTQ->get_renderer()->view_footer();
} else {
$this->RTQ->get_renderer()->view_header();
$this->RTQ->get_renderer()->group_session_started();
$this->RTQ->get_renderer()->view_footer();
}
}
break;
case 'selectgroupmembers':
if (empty($this->pagevars['group'])) {
$viewhome = clone $this->pageurl;
$viewhome->remove_params('action');
redirect($viewhome, get_string('invalid_group_selected', 'activequiz'), 5);
} else {
$this->pageurl->param('group', $this->pagevars['group']);
$groupselectform = new \mod_activequiz\forms\view\groupselectmembers($this->pageurl, array('rtq' => $this->RTQ, 'selectedgroup' => $this->pagevars['group']));
if ($data = $groupselectform->get_data()) {
// basically we want to get all gm* fields
$gmemnum = 1;
$groupmembers = array();
$data = get_object_vars($data);
while (isset($data['gm' . $gmemnum])) {
if ($data['gm' . $gmemnum] != 0) {
$groupmembers[] = $data['gm' . $gmemnum];
}
$gmemnum++;
}
$this->pageurl->param('groupmembers', implode(',', $groupmembers));
$this->pageurl->param('action', 'quizstart');
// redirect to the quiz start page
redirect($this->pageurl, null, 0);
} else {
$this->RTQ->get_renderer()->view_header();
$this->RTQ->get_renderer()->group_member_select($groupselectform);
$this->RTQ->get_renderer()->view_footer();
}
}
break;
default:
// default is to show view to start quiz (for instructors/quiz controllers) or join quiz (for everyone else)
// trigger event for course module viewed
$event = \mod_activequiz\event\course_module_viewed::create(array('objectid' => $PAGE->cm->instance, 'context' => $PAGE->context));
$event->add_record_snapshot('course', $this->RTQ->getCourse());
$event->add_record_snapshot($PAGE->cm->modname, $this->RTQ->getRTQ());
$event->trigger();
// determine home display based on role
if ($this->RTQ->is_instructor()) {
$startsessionform = new \mod_activequiz\forms\view\start_session($this->pageurl);
if ($data = $startsessionform->get_data()) {
// create a new quiz session
// first check to see if there are any open sessions
// this shouldn't occur, but never hurts to check
$sessions = $DB->get_records('activequiz_sessions', array('activequizid' => $this->RTQ->getRTQ()->id, 'sessionopen' => 1));
if (!empty($sessions)) {
// error out with that there are existing sessions
$this->RTQ->get_renderer()->setMessage(get_string('alreadyexisting_sessions', 'activequiz'), 'error');
$this->RTQ->get_renderer()->view_header();
$this->RTQ->get_renderer()->view_inst_home($startsessionform, $this->session->get_session());
$this->RTQ->get_renderer()->view_footer();
break;
} else {
if (!$this->session->create_session($data->sessionname)) {
// error handling
$this->RTQ->get_renderer()->setMessage(get_string('unabletocreate_session', 'activequiz'), 'error');
$this->RTQ->get_renderer()->view_header();
$this->RTQ->get_renderer()->view_inst_home($startsessionform, $this->session->get_session());
$this->RTQ->get_renderer()->view_footer();
break;
// break out of the switch
}
}
// redirect to the quiz start
$quizstarturl = clone $this->pageurl;
$quizstarturl->param('action', 'quizstart');
redirect($quizstarturl, null, 0);
} else {
$this->RTQ->get_renderer()->view_header();
$this->RTQ->get_renderer()->view_inst_home($startsessionform, $this->session->get_session());
$this->RTQ->get_renderer()->view_footer();
}
} else {
// check to see if the group already started a quiz
$validgroups = array();
if ($this->RTQ->group_mode()) {
// if there is already an attempt for this session for this group for this user don't allow them to start another
$validgroups = $this->session->check_attempt_for_group();
if (empty($validgroups) && $validgroups !== false) {
$this->RTQ->get_renderer()->view_header();
$this->RTQ->get_renderer()->group_session_started();
$this->RTQ->get_renderer()->view_footer();
break;
} else {
if ($validgroups === false) {
$validgroups = array();
}
}
}
$studentstartformparams = array('rtq' => $this->RTQ, 'validgroups' => $validgroups);
$studentstartform = new \mod_activequiz\forms\view\student_start_form($this->pageurl, $studentstartformparams);
if ($data = $studentstartform->get_data()) {
$quizstarturl = clone $this->pageurl;
$quizstarturl->param('action', 'quizstart');
// if data redirect to the quiz start url with the group selected if we're in group mode
if ($this->RTQ->group_mode()) {
$groupid = $data->group;
$quizstarturl->param('group', $groupid);
// check if the group attendance feature is enabled
// if so redirect to the group member select form
// don't send to group attendance form if an attempt is already started
if ($this->RTQ->getRTQ()->groupattendance == 1 && !$this->session->get_open_attempt_for_current_user()) {
$quizstarturl->param('action', 'selectgroupmembers');
}
redirect($quizstarturl, null, 0);
} else {
redirect($quizstarturl, null, 0);
}
} else {
// display student home. (form will display only if there is an active session
$this->RTQ->get_renderer()->view_header();
$this->RTQ->get_renderer()->view_student_home($studentstartform, $this->session);
$this->RTQ->get_renderer()->view_footer();
}
}
break;
}
}
