Bitbucket.hs

{-# LANGUAGE OverloadedStrings #-}
-- |
--
-- OAuth2 plugin for http://bitbucket.com
--
-- * Authenticates against bitbucket
-- * Uses bitbucket uuid as credentials identifier
--
module Yesod.Auth.OAuth2.Bitbucket
  ( oauth2Bitbucket
  , oauth2BitbucketScoped
  ) where

import Yesod.Auth.OAuth2.Prelude

import qualified Data.Text as T

newtype User = User Text

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

pluginName :: Text
pluginName = "bitbucket"

defaultScopes :: [Text]
defaultScopes = ["account"]

oauth2Bitbucket :: YesodAuth m => Text -> Text -> AuthPlugin m
oauth2Bitbucket = oauth2BitbucketScoped defaultScopes

oauth2BitbucketScoped :: YesodAuth m => [Text] -> Text -> Text -> AuthPlugin m
oauth2BitbucketScoped scopes clientId clientSecret =
  authOAuth2 pluginName oauth2 $ \manager token -> do
    (User userId, userResponse) <- authGetProfile
      pluginName
      manager
      token
      "https://api.bitbucket.com/2.0/user"

    pure Creds
      { credsPlugin = pluginName
        -- FIXME: Preserved bug. This should just be userId (it's already
        -- a Text), but because this code was shipped, folks likely have
        -- Idents in their database like @"\"...\""@, and if we fixed this
        -- they would need migrating. We're keeping it for now as it's a
        -- minor wart. Breaking typed APIs is one thing, causing data to go
        -- invalid is another.
      , credsIdent = T.pack $ show userId
      , credsExtra = setExtra token userResponse
      }
 where
  oauth2 = OAuth2
    { oauth2ClientId = clientId
    , oauth2ClientSecret = Just clientSecret
    , oauth2AuthorizeEndpoint =
      "https://bitbucket.com/site/oauth2/authorize"
        `withQuery` [scopeParam "," scopes]
    , oauth2TokenEndpoint = "https://bitbucket.com/site/oauth2/access_token"
    , oauth2RedirectUri = Nothing
    }