-- |
-- Module: Network.Greskell.WebSocket.Request.Aeson
-- Description: parser support
-- Maintainer: Toshio Ito <debug.ito@gmail.com>
--
-- __Internal module. End-users should not use this.__
module Network.Greskell.WebSocket.Request.Aeson
       ( genericToJSON, genericToEncoding, genericParseJSON,
         opt,
         toObject
       ) where

import Data.Aeson
  ( genericToJSON, genericToEncoding, genericParseJSON,
    ToJSON(..), Object, Value(Object)
  )
import Data.Aeson.Types 
  ( defaultOptions, omitNothingFields, Options
  )

opt :: Options
opt = defaultOptions { omitNothingFields = True }

toObject :: (ToJSON a) => a -> Object
toObject = expectObject . toJSON
  where
    expectObject (Object o) = o
    expectObject _ = error "Expect Object, but got something else"