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{-# LANGUAGE GeneralizedNewtypeDeriving, NoDeriveAnyClass #-}
-- | Typesafe identifiers for our various objects
module Thermoprint.Identifiers
( PrinterId(..)
, JobId(..)
, DraftId(..)
, castId
) where
import Servant.API (ToText, FromText)
import Data.Aeson (FromJSON, ToJSON)
newtype PrinterId = PrinterId Integer
deriving (Show, Eq, Ord, Num, Real, Integral, Enum, FromText, ToText, FromJSON, ToJSON)
newtype JobId = JobId Integer
deriving (Show, Eq, Ord, Num, Real, Integral, Enum, FromText, ToText, FromJSON, ToJSON)
newtype DraftId = DraftId Integer
deriving (Show, Eq, Ord, Num, Real, Integral, Enum, FromText, ToText, FromJSON, ToJSON)
castId :: (Integral a, Enum b) => a -> b
castId = toEnum . fromInteger . toInteger
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