/**
* @param int $examgroup_id
*/
public function __construct($examgroup_id)
{
// keep everything fetched from the db
$this->_examgroup = ORM::factory('examgroup', $examgroup_id);
// get all the exams in this exam group
$this->_exams = Model_Examgroup::get_exams($examgroup_id);
$this->_exams_arr = $this->_exams->as_array('id', 'name');
$this->_students = Model_Examgroup::get_students($examgroup_id);
$this->_results = Model_Examgroup::get_results($examgroup_id);
$this->_exam_wise_students = self::exam_wise_students($this->_exams);
}
/**
* Method to get the result sets from the post data submitted
* @param array $results (keys = exam_id, values = array ( keys = student_id, values = marks scored)
* @return array $results array keys (exam_id, user_id, marks)
*/
private function result_sets($examgroup_id, $examresults)
{
if (!$examresults) {
return array();
}
// get all the exams in this exam group
$exams = Model_Examgroup::get_exams($examgroup_id)->as_array('id', 'total_marks');
$sets = array();
foreach ($examresults as $exam_id => $results) {
foreach ($results as $user_id => $marks) {
if ($marks > $exams[$exam_id]) {
$this->_invalid_rows[] = $user_id;
}
$sets[] = array('exam_id' => $exam_id, 'user_id' => $user_id, 'marks' => $marks);
}
}
return $sets;
}