Twitter.hs

{-# LANGUAGE QuasiQuotes #-}

-- | [Twitter OAuth2 guide](https://developer.twitter.com/en/docs/authentication/oauth-2-0/authorization-code)
module Network.OAuth2.Provider.Twitter where

import Control.Monad.IO.Class (MonadIO (..))
import Control.Monad.Trans.Except (ExceptT (..))
import Data.Aeson
import Data.ByteString.Lazy.Char8 qualified as BSL
import Data.Char (toLower)
import Data.Map.Strict qualified as Map
import Data.Set qualified as Set
import Data.Text.Lazy (Text)
import GHC.Generics
import Network.HTTP.Conduit (Manager)
import Network.OAuth.OAuth2
import Network.OAuth2.Experiment
import Network.OAuth2.Provider
import URI.ByteString.QQ

sampleTwitterAuthorizationCodeApp :: AuthorizationCodeApplication
sampleTwitterAuthorizationCodeApp =
  AuthorizationCodeApplication
    { acClientId = ""
    , acClientSecret = ""
    , acScope = Set.fromList ["tweet.read", "users.read"]
    , acAuthorizeState = "CHANGE_ME"
    , acRedirectUri = [uri|http://localhost|]
    , acName = "sample-twitter-authorization-code-app"
    , acTokenRequestAuthenticationMethod = ClientSecretBasic
    , acAuthorizeRequestExtraParams = Map.empty
    }

fetchUserInfo ::
  (MonadIO m, HasUserInfoRequest a, FromJSON b) =>
  IdpApplication i a ->
  Manager ->
  AccessToken ->
  ExceptT BSL.ByteString m b
fetchUserInfo = conduitUserInfoRequest

defaultTwitterIdp :: Idp Twitter
defaultTwitterIdp =
  Idp
    { idpUserInfoEndpoint = [uri|https://api.twitter.com/2/users/me|]
    , idpAuthorizeEndpoint = [uri|https://twitter.com/i/oauth2/authorize|]
    , idpTokenEndpoint = [uri|https://api.twitter.com/2/oauth2/token|]
    , idpDeviceAuthorizationEndpoint = Nothing
    }

data TwitterUser = TwitterUser
  { name :: Text
  , id :: Text
  , username :: Text
  }
  deriving (Show, Generic)

newtype TwitterUserResp = TwitterUserResp {twitterUserRespData :: TwitterUser}
  deriving (Show, Generic)

instance FromJSON TwitterUserResp where
  -- 15 = length "twitterUserResp"
  parseJSON = genericParseJSON (defaultOptions {fieldLabelModifier = map toLower . drop 15})

instance FromJSON TwitterUser