Spotify.hs

{-# LANGUAGE OverloadedStrings #-}
-- |
--
-- OAuth2 plugin for http://spotify.com
--
module Yesod.Auth.OAuth2.Spotify
  ( oauth2Spotify
  ) where

import Yesod.Auth.OAuth2.Prelude

newtype User = User Text

instance FromJSON User where
  parseJSON = withObject "User" $ \o -> User <$> o .: "id"

pluginName :: Text
pluginName = "spotify"

oauth2Spotify :: YesodAuth m => [Text] -> Text -> Text -> AuthPlugin m
oauth2Spotify scopes clientId clientSecret =
  authOAuth2 pluginName oauth2 $ \manager token -> do
    (User userId, userResponse) <- authGetProfile
      pluginName
      manager
      token
      "https://api.spotify.com/v1/me"

    pure Creds
      { credsPlugin = pluginName
      , credsIdent = userId
      , credsExtra = setExtra token userResponse
      }
 where
  oauth2 = OAuth2
    { oauth2ClientId = clientId
    , oauth2ClientSecret = Just clientSecret
    , oauth2AuthorizeEndpoint =
      "https://accounts.spotify.com/authorize"
        `withQuery` [scopeParam " " scopes]
    , oauth2TokenEndpoint = "https://accounts.spotify.com/api/token"
    , oauth2RedirectUri = Nothing
    }