{-# LANGUAGE OverloadedStrings #-}

-- |
--
-- OAuth2 plugin for http://upcase.com
--
-- * Authenticates against upcase
-- * Uses upcase user id as credentials identifier
module Yesod.Auth.OAuth2.Upcase
  ( oauth2Upcase
  ) where

import Yesod.Auth.OAuth2.Prelude

import qualified Data.Text as T

newtype User = User Int

instance FromJSON User where
  parseJSON :: Value -> Parser User
parseJSON = String -> (Object -> Parser User) -> Value -> Parser User
forall a. String -> (Object -> Parser a) -> Value -> Parser a
withObject String
"User" ((Object -> Parser User) -> Value -> Parser User)
-> (Object -> Parser User) -> Value -> Parser User
forall a b. (a -> b) -> a -> b
$ \Object
root -> do
    Object
o <- Object
root Object -> Key -> Parser Object
forall a. FromJSON a => Object -> Key -> Parser a
.: Key
"user"
    Int -> User
User (Int -> User) -> Parser Int -> Parser User
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> Object
o Object -> Key -> Parser Int
forall a. FromJSON a => Object -> Key -> Parser a
.: Key
"id"

pluginName :: Text
pluginName :: Text
pluginName = Text
"upcase"

oauth2Upcase :: YesodAuth m => Text -> Text -> AuthPlugin m
oauth2Upcase :: forall m. YesodAuth m => Text -> Text -> AuthPlugin m
oauth2Upcase Text
clientId Text
clientSecret =
  Text -> OAuth2 -> FetchCreds m -> AuthPlugin m
forall m.
YesodAuth m =>
Text -> OAuth2 -> FetchCreds m -> AuthPlugin m
authOAuth2 Text
pluginName OAuth2
oauth2 (FetchCreds m -> AuthPlugin m) -> FetchCreds m -> AuthPlugin m
forall a b. (a -> b) -> a -> b
$ \Manager
manager OAuth2Token
token -> do
    (User Int
userId, ByteString
userResponse) <-
      Text -> Manager -> OAuth2Token -> URI -> IO (User, ByteString)
forall a.
FromJSON a =>
Text -> Manager -> OAuth2Token -> URI -> IO (a, ByteString)
authGetProfile
        Text
pluginName
        Manager
manager
        OAuth2Token
token
        URI
"http://upcase.com/api/v1/me.json"

    Creds m -> IO (Creds m)
forall a. a -> IO a
forall (f :: * -> *) a. Applicative f => a -> f a
pure
      Creds
        { credsPlugin :: Text
credsPlugin = Text
pluginName
        , credsIdent :: Text
credsIdent = String -> Text
T.pack (String -> Text) -> String -> Text
forall a b. (a -> b) -> a -> b
$ Int -> String
forall a. Show a => a -> String
show Int
userId
        , credsExtra :: [(Text, Text)]
credsExtra = OAuth2Token -> ByteString -> [(Text, Text)]
setExtra OAuth2Token
token ByteString
userResponse
        }
 where
  oauth2 :: OAuth2
oauth2 =
    OAuth2
      { oauth2ClientId :: Text
oauth2ClientId = Text
clientId
      , oauth2ClientSecret :: Maybe Text
oauth2ClientSecret = Text -> Maybe Text
forall a. a -> Maybe a
Just Text
clientSecret
      , oauth2AuthorizeEndpoint :: URI
oauth2AuthorizeEndpoint = URI
"http://upcase.com/oauth/authorize"
      , oauth2TokenEndpoint :: URI
oauth2TokenEndpoint = URI
"http://upcase.com/oauth/token"
      , oauth2RedirectUri :: Maybe URI
oauth2RedirectUri = Maybe URI
forall a. Maybe a
Nothing
      }