WordPressDotCom.hs

{-# LANGUAGE OverloadedStrings #-}

module Yesod.Auth.OAuth2.WordPressDotCom
  ( oauth2WordPressDotCom
  ) where

import qualified Data.Text as T
import Yesod.Auth.OAuth2.Prelude

pluginName :: Text
pluginName = "WordPress.com"

newtype WpUser = WpUser Int

instance FromJSON WpUser where
  parseJSON = withObject "WpUser" $ \o -> WpUser <$> o .: "ID"

oauth2WordPressDotCom
  :: YesodAuth m
  => Text
  -- ^ Client Id
  -> Text
  -- ^ Client Secret
  -> AuthPlugin m
oauth2WordPressDotCom clientId clientSecret =
  authOAuth2 pluginName oauth2 $ \manager token -> do
    (WpUser userId, userResponse) <-
      authGetProfile
        pluginName
        manager
        token
        "https://public-api.wordpress.com/rest/v1/me/"

    pure
      Creds
        { credsPlugin = pluginName
        , credsIdent = T.pack $ show userId
        , credsExtra = setExtra token userResponse
        }
 where
  oauth2 =
    OAuth2
      { oauth2ClientId = clientId
      , oauth2ClientSecret = clientSecret
      , oauth2AuthorizeEndpoint =
          "https://public-api.wordpress.com/oauth2/authorize"
            `withQuery` [scopeParam "," ["auth"]]
      , oauth2TokenEndpoint = "https://public-api.wordpress.com/oauth2/token"
      , oauth2RedirectUri = Nothing
      }