+data IntRRService = IntRRService { isvName :: String
+ , isvProto :: String
+ , isvPrio :: Int
+ , isvWeight :: Int
+ , isvPort :: Int
+ , isvHost :: String
+ } deriving (Show, Eq)
+
+instance FromJSON IntRRService where
+ parseJSON (Array a) =
+ if length a == 6 then IntRRService
+ <$> parseJSON (a ! 0)
+ <*> parseJSON (a ! 1)
+ <*> parseJSON (a ! 2)
+ <*> parseJSON (a ! 3)
+ <*> parseJSON (a ! 4)
+ <*> parseJSON (a ! 5)
+ else empty
+ parseJSON _ = empty
+
+makeMx :: Object -> Parser (Maybe [String])
+makeMx o =
+ case H.lookup "service" o of
+ Nothing -> pure Nothing
+ Just (Array a) -> do
+ isvl <- parseJSON (Array a)
+ return $ Just $ map mxStr $ filter mxMatch isvl
+ where
+ mxMatch isv = isvName isv == "smtp"
+ && isvProto isv == "tcp"
+ && isvPort isv == 25
+ mxStr isv = (show (isvPrio isv)) ++ "\t" ++ (isvHost isv)
+ Just _ -> empty
+
+makeSubmap :: Object -> Parser (Maybe (Map String NmcDom))
+makeSubmap o = ((.).(.)) merge merge <$> takeTls o <*> takeSrv o <*> takeMap o
+
+takeMap :: Object -> Parser (Maybe (Map String NmcDom))
+takeMap o = o .:? "map"
+
+takeSrv :: Object -> Parser (Maybe (Map String NmcDom))
+takeSrv o =
+ case H.lookup "service" o of
+ Nothing -> pure Nothing
+ Just (Array a) -> do
+ isvl <- parseJSON (Array a)
+ return $ foldr addSrv (Just M.empty) isvl
+ where
+ addSrv isv acc = subm `merge` acc
+ where
+ subm = Just (M.singleton ("_" ++ isvProto isv) sub2)
+ sub2 = def { domSubmap =
+ Just (M.singleton ("_" ++ isvName isv) sub3) }
+ sub3 = def { domSrv = Just [ NmcRRSrv (isvPrio isv)
+ (isvWeight isv)
+ (isvPort isv)
+ (isvHost isv) ] }
+ Just _ -> empty
+
+-- takeTls is almost, but not quite, entirely unlike takeSrv
+takeTls :: Object -> Parser (Maybe (Map String NmcDom))
+takeTls o = o .:? "map" -- FIXME
+