/**
* set up the class for the view page
*
* @throws \moodle_exception throws exception on error in setting up initial vars when debugging
*/
public function setup_page()
{
global $DB, $PAGE;
// no page url as this is just a callback
$this->pageurl = null;
$this->jsonlib = new \mod_activequiz\utils\jsonlib();
// first check if this is a jserror, if so, log it and end execution so we're not wasting time
$jserror = optional_param('jserror', '', PARAM_ALPHANUMEXT);
if (!empty($jserror)) {
// log the js error on the apache error logs
error_log($jserror);
// set a status and send it saying that we logged the error
$this->jsonlib->set('status', 'loggedjserror');
$this->jsonlib->send_response();
}
// use try/catch in order to catch errors and not display them on a javascript callback
try {
$rtqid = required_param('rtqid', PARAM_INT);
$sessionid = required_param('sessionid', PARAM_INT);
$attemptid = required_param('attemptid', PARAM_INT);
$this->action = required_param('action', PARAM_ALPHANUMEXT);
$this->pagevars['inquesetion'] = optional_param('inquestion', '', PARAM_ALPHAEXT);
// only load things asked for, don't assume that we're loading whatever
$quiz = $DB->get_record('activequiz', array('id' => $rtqid), '*', MUST_EXIST);
$course = $DB->get_record('course', array('id' => $quiz->course), '*', MUST_EXIST);
$cm = get_coursemodule_from_instance('activequiz', $quiz->id, $course->id, false, MUST_EXIST);
$session = $DB->get_record('activequiz_sessions', array('id' => $sessionid), '*', MUST_EXIST);
require_login($course->id, false, $cm, false, true);
} catch (\moodle_exception $e) {
if (debugging()) {
// if debugging throw error as normal
throw new $e();
} else {
$this->jsonlib->send_error('invalid request');
}
exit;
// stop execution
}
// check to make sure asked for session is open
if ((int) $session->sessionopen !== 1) {
$this->jsonlib->send_error('invalidsession');
}
$this->pagevars['pageurl'] = $this->pageurl;
$this->pagevars['action'] = $this->action;
$this->RTQ = new \mod_activequiz\activequiz($cm, $course, $quiz, $this->pagevars);
// set up renderer
$this->RTQ->get_renderer()->init($this->RTQ, $this->pageurl, $this->pagevars);
// finally set up the question manager and the possible activequiz session
$this->session = new \mod_activequiz\activequiz_session($this->RTQ, $this->pageurl, $this->pagevars, $session);
// get and validate the attempt
$attempt = $this->session->get_user_attempt($attemptid);
if ($attempt->getStatus() != 'inprogress') {
$this->jsonlib->send_error('invalidattempt');
}
// if the attempt validates, make it the open attempt on the session
$this->session->set_open_attempt($attempt);
}
