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{-# LANGUAGE DeriveGeneric, GeneralizedNewtypeDeriving, NoDeriveAnyClass #-}
-- | Typesafe identifiers for our various objects
module Thermoprint.Identifiers
( PrinterId(..)
, JobId(..)
, DraftId(..)
, castId
) where
import Data.Typeable (Typeable)
import GHC.Generics (Generic)
import Control.DeepSeq (NFData)
import Servant.API (ToHttpApiData, FromHttpApiData)
import Data.Aeson (FromJSON, ToJSON)
newtype PrinterId = PrinterId Integer
deriving (Show, Read, Eq, Ord, Num, Real, Integral, Enum, FromHttpApiData, ToHttpApiData, FromJSON, ToJSON, Typeable, Generic, NFData)
newtype JobId = JobId Integer
deriving (Show, Read, Eq, Ord, Num, Real, Integral, Enum, FromHttpApiData, ToHttpApiData, FromJSON, ToJSON, Typeable, Generic, NFData)
newtype DraftId = DraftId Integer
deriving (Show, Read, Eq, Ord, Num, Real, Integral, Enum, FromHttpApiData, ToHttpApiData, FromJSON, ToJSON, Typeable, Generic, NFData)
castId :: (Integral a, Enum b) => a -> b
castId = toEnum . fromInteger . toInteger
|
