public function UpdateCurrentRank(Course $course, Comment $comment)
{
$c = $course->comments;
$total_comment = $course->comments->count();
$teach = $comment->teach_q;
$time = $comment->time_c;
$sign = $comment->sign_d;
$test = $comment->test_d;
$homework = $comment->homework_d;
$grade = $comment->grade_d;
$TA = $comment->TA_r;
$practical = $comment->practical_r;
$roll = $comment->rollCall_r;
$nutrition = $comment->nutrition_r;
$Pasitive = $teach + $practical + $TA + $nutrition;
$Negative = $test + $homework + $grade + $time + $roll + $sign;
$test = 100 - $test;
$homework = 100 - $homework;
$grade = 100 - $grade;
$time = 100 - $time;
$roll = 100 - $roll;
$sign = 100 - $sign;
$total = ($Pasitive + $test + $homework + $grade + $time + $sign + $roll) / 100;
// If Negative == Pasitive, current_rank won't be changed
$rank = $course->current_rank;
if ($Negative > $Pasitive * 1.5) {
$rank -= $total;
} else {
if ($Negative < $Pasitive * 1.5) {
$rank += $total;
}
}
$course->current_rank = $rank;
$course->teach_quality = ($c->sum('teach_q') + 50) / ($total_comment + 1);
$course->time_cost = ($c->sum('time_c') + 50) / ($total_comment + 1);
$course->sign_dif = ($c->sum('sign_d') + 50) / ($total_comment + 1);
$course->test_dif = ($c->sum('test_d') + 50) / ($total_comment + 1);
$course->homework_dif = ($c->sum('homework_d') + 50) / ($total_comment + 1);
$course->grade_dif = ($c->sum('grade_d') + 50) / ($total_comment + 1);
$course->TA_rank = ($c->sum('TA_r') + 50) / ($total_comment + 1);
$course->practical_rank = ($c->sum('practical_r') + 50) / ($total_comment + 1);
$course->roll_freq = ($c->sum('rollCall_r') + 50) / ($total_comment + 1);
$course->nutrition_rank = ($c->sum('nutrition_r') + 50) / ($total_comment + 1);
$course->judge_people = $total_comment;
$course->save();
}
