public static function calculate_course_completion($student_id, $course_id, $update = true)
{
if (empty($course_id)) {
return false;
}
$cache_key = __METHOD__ . '-' . $student_id . '-' . $course_id;
if (CoursePress_Cache::cp_cache_get($cache_key)) {
return CoursePress_Cache::cp_cache_get($cache_key);
}
$data = self::get_completion_data($student_id, $course_id);
$course = new Course($course_id);
$total_units = $course->get_units($course_id, 'publish', true);
// No units or no units published
if (empty($total_units)) {
CoursePress_Cache::cp_cache_set($cache_key, 0);
return 0;
}
$progress = 0.0;
if (isset($data['unit']) && is_array($data['unit'])) {
foreach ($data['unit'] as $unit_id => $unit) {
if ('publish' == get_post_status($unit_id)) {
$progress += self::calculate_unit_completion($student_id, $course_id, $unit_id, $update, $data);
}
}
$progress = $progress / $total_units;
$progress = $progress > 100 ? 100 : $progress;
$data['course_progress'] = $progress;
}
if ($update) {
self::update_completion_data($student_id, $course_id, $data);
}
if (100 == (int) $progress) {
do_action('coursepress_set_course_completed', $student_id, $course_id);
}
CoursePress_Cache::cp_cache_set($cache_key, $progress);
return $progress;
}
