1 files changed, 39 insertions, 0 deletions
diff --git a/src/Sproxy/Application/OAuth2/Common.hs b/src/Sproxy/Application/OAuth2/Common.hs
new file mode 100644
index 0000000..07fb759
--- /dev/null
+++ b/src/Sproxy/Application/OAuth2/Common.hs
@@ -0,0 +1,39 @@
+{-# LANGUAGE OverloadedStrings #-}
+module Sproxy.Application.OAuth2.Common (
+  AccessTokenBody(..)
+, OAuth2Client(..)
+, OAuth2Provider
+) where
+
+import Control.Applicative (empty)
+import Data.Aeson (FromJSON, parseJSON, Value(Object), (.:))
+import Data.ByteString(ByteString)
+
+import Sproxy.Application.Cookie (AuthUser)
+
+data OAuth2Client = OAuth2Client {
+  oauth2Description :: String
+, oauth2AuthorizeURL
+    :: ByteString -- state
+    -> ByteString -- redirect url
+    -> ByteString
+, oauth2Authenticate
+    :: ByteString -- code
+    -> ByteString -- redirect url
+    -> IO AuthUser
+}
+
+type OAuth2Provider = (ByteString, ByteString) -> OAuth2Client
+
+-- | RFC6749. We ignore optional token_type ("Bearer" from Google, omitted by LinkedIn)
+--   and expires_in because we don't use them, *and* expires_in creates troubles:
+--   it's an integer from Google and string from LinkedIn (sic!)
+data AccessTokenBody = AccessTokenBody {
+  accessToken :: String
+} deriving (Eq, Show)
+
+instance FromJSON AccessTokenBody where
+  parseJSON (Object v) = AccessTokenBody
+    <$> v .:  "access_token"
+  parseJSON _ = empty
+