/**
* Determines if the course has had the minimum number of students in previous teachings.
* First, looks into Moodle core tables for existing previous students. If it doesn't find any, it tries luck in
* plugin's historic table. If it doesn't found neither here, means that the course has not previous students.
*
* @param int $courseid The course to determine if meets the minimum students.
* @param int $currentyear The year of the given current course.
* @param \block_mycourse_recommendations\database_helper $db The object with deals with database.
* @return boolean If the given course has the minimum students or not.
*/
public static function meets_minimum_previous_students($courseid, $currentyear, $db)
{
$previousstudents = $db->get_previous_courses_students_number_core_tables($courseid, $currentyear);
$minimum = false;
if ($previousstudents >= self::MINIMUM_PREVIOUS_STUDENTS) {
$minimum = true;
}
if (!$minimum) {
$previousstudents = $db->get_previous_courses_resources_number_historic_tables($courseid, $currentyear);
if ($previousstudents >= self::MINIMUM_PREVIOUS_STUDENTS) {
$minimum = true;
}
}
return $minimum;
}
