conferer-aeson-1.0.0.0: src/Conferer/FromConfig/Aeson.hs

-- |
-- Copyright: (c) 2019 Lucas David Traverso
-- License: MPL-2.0
-- Maintainer: Lucas David Traverso <lucas6246@gmail.com>
-- Stability: stable
-- Portability: portable
--
-- Source for json config files using Aeson
{-# LANGUAGE TypeApplications #-}
{-# OPTIONS_GHC -fno-warn-orphans #-}
module Conferer.FromConfig.Aeson where

import Data.Aeson

import Conferer.FromConfig
import Data.Text (Text)
import qualified Data.Text.Encoding as Text

instance FromConfig Value where
  fetchFromConfig key config = do
    rawAeson <- fetchFromConfig @Text key config
    case eitherDecodeStrict' @Value $ Text.encodeUtf8 rawAeson of
      Right value -> 
        return value
      Left _ -> 
        throwConfigParsingError @Value key rawAeson