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{-# LANGUAGE DataKinds #-}
{-# LANGUAGE DeriveGeneric #-}
{-# LANGUAGE TypeFamilies #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE TypeOperators #-}
{-# LANGUAGE TemplateHaskell #-}
module Authentication (User, queryUser) where
import Data.Aeson
import GHC.Generics
import Network.HTTP.Conduit
import Data.ByteString.Lazy.Char8 (unpack)
import Control.Exception
makeUrl = ("https://www.googleapis.com/oauth2/v3/tokeninfo?id_token="++)
data User = User
{ email :: String
, name :: String
} deriving (Eq, Show, Generic)
instance FromJSON User
queryUser :: String -> IO (Maybe User)
queryUser token = (queryUser' token) `catch` \e -> do
print (e :: HttpException)
return Nothing
queryUser' token = do
response <- simpleHttp (makeUrl token)
return (decode response)
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