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{-# LANGUAGE EmptyDataDecls #-}
{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE GADTs #-}
{-# LANGUAGE GeneralizedNewtypeDeriving #-}
{-# LANGUAGE MultiParamTypeClasses #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE QuasiQuotes #-}
{-# LANGUAGE TemplateHaskell #-}
{-# LANGUAGE TypeFamilies #-}
--------------------------------------------------------------------------------
module Types where
--------------------------------------------------------------------------------
import Data.Aeson
import Data.Text
import Database.Persist.TH
--------------------------------------------------------------------------------
share [mkPersist sqlSettings, mkMigrate "migrateAll"] [persistLowerCase|
User
name Text
age Int
UniqueName name
deriving Eq Read Show
|]
instance FromJSON User where
parseJSON = withObject "User" $ \ v ->
User <$> v .: "name"
<*> v .: "age"
instance ToJSON User where
toJSON (User name age) =
object [ "name" .= name
, "age" .= age
]
newtype Username = Username Text
deriving (Eq, Show)
instance ToJSON Username where
toJSON (Username x) = toJSON x
newtype Password = Password Text
deriving (Eq, Show)
instance ToJSON Password where
toJSON (Password x) = toJSON x
data Role = RegularUser | Manager | Admin
deriving (Eq, Show)
instance ToJSON Role where
toJSON RegularUser = "user"
toJSON Manager = "manager"
toJSON Admin = "admin"
data Session = Session
{ username :: Username
, password :: Password
, role :: Role
} deriving (Eq, Show)
instance ToJSON Session where
toJSON (Session username password role) =
object [ "username" .= username
, "password" .= password
, "role" .= role
]
|
