module Indicator
  ( Indicator(..)
  , className
  , fromGlycemicLoad
  ) where

import Prelude

data Indicator = Good | Medium | Bad

className :: Indicator -> String
className Good = "good"
className Medium = "medium"
className Bad = "bad"

fromGlycemicLoad :: Number -> Indicator
fromGlycemicLoad n
  | n <= 8.0 = Good
  | n <= 20.0 = Medium
  | otherwise = Bad