public function prevent_new_attempt($numattempts, $lastattempt)
{
global $DB;
if ($numattempts == 0) {
return false;
}
// Check if preventonpass is set, and whether the student has passed the minimum passing grade.
$previousattempts = $DB->get_records_select('quiz_attempts', "quiz = :quizid AND userid = :userid AND timefinish > 0 and preview != 1", array('quizid' => $this->quiz->id, 'userid' => $lastattempt->userid));
if (quiz_rescale_grade(quiz_calculate_best_grade($this->quiz, $previousattempts), $this->quiz, false) >= $this->quiz->reattemptchecker) {
return get_string('accessprevented', 'quizaccess_reattemptchecker');
}
return false;
}
/**
* Save the overall grade for a user at a quiz in the quiz_grades table
*
* @param object $quiz The quiz for which the best grade is to be calculated and then saved.
* @param integer $userid The userid to calculate the grade for. Defaults to the current user.
* @return boolean Indicates success or failure.
*/
function quiz_save_best_grade($quiz, $userid = null)
{
global $USER;
if (empty($userid)) {
$userid = $USER->id;
}
// Get all the attempts made by the user
if (!($attempts = quiz_get_user_attempts($quiz->id, $userid))) {
notify('Could not find any user attempts');
return false;
}
// Calculate the best grade
$bestgrade = quiz_calculate_best_grade($quiz, $attempts);
$bestgrade = quiz_rescale_grade($bestgrade, $quiz);
// Save the best grade in the database
if ($grade = get_record('quiz_grades', 'quiz', $quiz->id, 'userid', $userid)) {
$grade->grade = $bestgrade;
$grade->timemodified = time();
if (!update_record('quiz_grades', $grade)) {
notify('Could not update best grade');
return false;
}
} else {
$grade->quiz = $quiz->id;
$grade->userid = $userid;
$grade->grade = $bestgrade;
$grade->timemodified = time();
if (!insert_record('quiz_grades', $grade)) {
notify('Could not insert new best grade');
return false;
}
}
quiz_update_grades($quiz, $userid);
return true;
}
/**
* Save the overall grade for a user at a quiz in the quiz_grades table
*
* @param object $quiz The quiz for which the best grade is to be calculated and then saved.
* @param int $userid The userid to calculate the grade for. Defaults to the current user.
* @param array $attempts The attempts of this user. Useful if you are
* looping through many users. Attempts can be fetched in one master query to
* avoid repeated querying.
* @return bool Indicates success or failure.
*/
function quiz_save_best_grade($quiz, $userid = null, $attempts = array()) {
global $DB, $OUTPUT, $USER;
if (empty($userid)) {
$userid = $USER->id;
}
if (!$attempts) {
// Get all the attempts made by the user.
$attempts = quiz_get_user_attempts($quiz->id, $userid);
}
// Calculate the best grade.
$bestgrade = quiz_calculate_best_grade($quiz, $attempts);
$bestgrade = quiz_rescale_grade($bestgrade, $quiz, false);
// Save the best grade in the database.
if (is_null($bestgrade)) {
$DB->delete_records('quiz_grades', array('quiz' => $quiz->id, 'userid' => $userid));
} else if ($grade = $DB->get_record('quiz_grades',
array('quiz' => $quiz->id, 'userid' => $userid))) {
$grade->grade = $bestgrade;
$grade->timemodified = time();
$DB->update_record('quiz_grades', $grade);
} else {
$grade = new stdClass();
$grade->quiz = $quiz->id;
$grade->userid = $userid;
$grade->grade = $bestgrade;
$grade->timemodified = time();
$DB->insert_record('quiz_grades', $grade);
}
quiz_update_grades($quiz, $userid);
}
/**
* Save the overall grade for a user at a quiz in the quiz_grades table
*
* @param object $quiz The quiz for which the best grade is to be calculated and then saved.
* @param integer $userid The userid to calculate the grade for. Defaults to the current user.
* @param array $attempts The attempts of this user. Useful if you are
* looping through many users. Attempts can be fetched in one master query to
* avoid repeated querying.
* @return boolean Indicates success or failure.
*/
function quiz_save_best_grade($quiz, $userid = null, $attempts = array())
{
global $DB;
global $USER, $OUTPUT;
if (empty($userid)) {
$userid = $USER->id;
}
if (!$attempts) {
// Get all the attempts made by the user
if (!($attempts = quiz_get_user_attempts($quiz->id, $userid))) {
echo $OUTPUT->notification('Could not find any user attempts');
return false;
}
}
// Calculate the best grade
$bestgrade = quiz_calculate_best_grade($quiz, $attempts);
$bestgrade = quiz_rescale_grade($bestgrade, $quiz, false);
// Save the best grade in the database
if ($grade = $DB->get_record('quiz_grades', array('quiz' => $quiz->id, 'userid' => $userid))) {
$grade->grade = $bestgrade;
$grade->timemodified = time();
$DB->update_record('quiz_grades', $grade);
} else {
$grade->quiz = $quiz->id;
$grade->userid = $userid;
$grade->grade = $bestgrade;
$grade->timemodified = time();
$DB->insert_record('quiz_grades', $grade);
}
quiz_update_grades($quiz, $userid);
return true;
}
