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{-# LANGUAGE DerivingStrategies #-}
{-# LANGUAGE QuantifiedConstraints #-}
{-# LANGUAGE ImpredicativeTypes #-}
{-# LANGUAGE TypeFamilies #-}
{-# LANGUAGE AllowAmbiguousTypes #-}
module Conftrack.Value (Value(..), ConfigError(..), Key(..), ConfigValue(..), Origin(..)) where
import Data.Text(Text)
import Data.List.NonEmpty (NonEmpty)
data Value =
ConfigText Text
| ConfigInteger Integer
| ConfigOther Text Text
deriving Show
newtype Key = Key (NonEmpty Text)
deriving newtype (Eq, Ord, Show)
data ConfigError =
ParseError
| NotPresent
deriving Show
class ConfigValue a where
fromConfig :: Value -> Either ConfigError a
data Origin = Origin Key Text
deriving Show
instance ConfigValue Text where
fromConfig (ConfigText a) = Right a
fromConfig _ = Left ParseError
instance ConfigValue Integer where
fromConfig (ConfigInteger a) = Right a
fromConfig _ = Left ParseError
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