+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 = takeTls o `fmerge` takeSrv o `fmerge` takeMap o
+ where fmerge = liftA2 merge
+
+takeMap :: Object -> Parser (Maybe (Map String NmcDom))
+takeMap o =
+ case H.lookup "map" o of
+ Nothing -> pure Nothing
+ Just (Object mo) -> H.foldrWithKey addmapentry (pure (Just M.empty)) mo
+ where
+ addmapentry "" v acc = parseJSON v >>= inject acc ""
+ addmapentry k v acc = nest (splitOn "." (unpack k)) v acc
+ nest [] v acc = empty -- does not happen as a result of splitOn
+ nest [""] v acc = empty -- empty element of fqdn forbidden
+ nest [d] v acc = parseJSON v >>= inject acc d
+ nest (d:ds) v acc =
+ nest ds v acc >>= (inject acc d) . (\r -> def { domSubmap = r })
+ inject acc d r = (fmap.fmap) (M.insertWith merge d r) acc
+ _ -> empty
+
+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 =
+ case H.lookup "tls" o of
+ Nothing -> pure Nothing
+ Just (Object t) ->
+ (parseJSON (Object t) :: Parser (Map String (Map String [NmcRRTlsa])))
+ >>= tmap2dmap
+ where
+ tmap2dmap :: Map String (Map String [NmcRRTlsa])
+ -> Parser (Maybe (Map String NmcDom))
+ -- FIXME return parse error on invalid proto or port
+ tmap2dmap m1 = return $ foldrWithKey addprotoelem (Just M.empty) m1
+ addprotoelem k1 m2 acc = protoelem k1 m2 `merge` acc
+ protoelem k1 m2 = Just (M.singleton ("_" ++ k1) (pmap2dmap m2))
+ pmap2dmap m2 = foldrWithKey addportelem def m2
+ addportelem k2 v acc = portelem k2 v `merge` acc
+ portelem k2 v =
+ def { domSubmap = Just (M.singleton ("_" ++ k2)
+ def { domTlsa = Just v }) }
+ Just _ -> empty
+