add .gitignore

[pdns-pipe-nmc.git] / NmcJson.hs

diff --git a/NmcJson.hs b/NmcJson.hs
index 651aa46f1be2631fd8245f8ff899544af59546c8..69e693ff000e7ea5aafb986e5c45f017a1c60d05 100644 (file)
--- a/NmcJson.hs
+++ b/NmcJson.hs
@@ -1,12 +1,16 @@
 {-# LANGUAGE OverloadedStrings #-}
 
 module NmcJson  ( NmcRes(..)
-                , NmcDom
+                , NmcDom(..)
                 , emptyNmcDom
+                , descendNmc
                 ) where
 
 import Data.ByteString.Lazy (ByteString)
-import Data.Map (Map)
+import Data.Text as T (unpack)
+import Data.List.Split
+import Data.Char
+import Data.Map as M (Map, lookup)
 import Control.Applicative ((<$>), (<*>), empty)
 import Data.Aeson
 
@@ -17,7 +21,7 @@ data NmcRRService = NmcRRService -- unused
                         , srvW2         :: Int
                         , srvPort       :: Int
                         , srvHost       :: [String]
-                        } deriving (Show)
+                        } deriving (Show, Eq)
 
 instance FromJSON NmcRRService where
         parseJSON (Object o) = NmcRRService
@@ -33,7 +37,7 @@ data NmcRRI2p = NmcRRI2p
                         { i2pDestination :: String
                         , i2pName        :: String
                         , i2pB32         :: String
-                        } deriving (Show)
+                        } deriving (Show, Eq)
 
 instance FromJSON NmcRRI2p where
         parseJSON (Object o) = NmcRRI2p
@@ -61,9 +65,22 @@ data NmcDom = NmcDom    { domService     :: Maybe [[String]] -- [NmcRRService]
                         , domTls         :: Maybe (Map String
                                                     (Map String [[String]]))
                         , domDs          :: Maybe [[String]]
-                        } deriving (Show)
+                        } deriving (Show, Eq)
 
 instance FromJSON NmcDom where
+        -- Wherever we expect a domain object, there may be a string
+        -- containing IPv4 address. Interpret it as such.
+        -- Question: shall we try to recognize IPv6 addresses too?
+        parseJSON (String s) =
+                 return $ if isIPv4 s'
+                            then emptyNmcDom { domIp = Just [s'] }
+                            else emptyNmcDom
+                          where
+                            s' = T.unpack s
+                            isIPv4 x = all isNibble $ splitOn "." x
+                            isNibble x =
+                              if all isDigit x then (read x :: Int) < 256
+                              else False
         parseJSON (Object o) = NmcDom
                 <$> o .:? "service"
                 <*> o .:? "ip"
@@ -103,3 +120,57 @@ instance FromJSON NmcRes where
                 <*> o .: "address"
                 <*> o .: "expires_in"
         parseJSON _ = empty
+
+normalizeDom :: NmcDom -> NmcDom
+normalizeDom dom
+  | domNs        dom /= Nothing = emptyNmcDom { domNs    = domNs dom
+                                              , domEmail = domEmail dom
+                                              }
+  | domDelegate  dom /= Nothing = emptyNmcDom -- FIXME
+  | domTranslate dom /= Nothing = dom { domMap = Nothing }
+  | otherwise                   = dom
+
+descendNmc :: [String] -> NmcDom -> NmcDom
+descendNmc subdom rawdom =
+  let dom = normalizeDom rawdom
+  in case subdom of
+    []   ->
+      case domMap dom of
+        Nothing  -> dom
+        Just map ->
+          case M.lookup "" map of         -- Stupid, but there are "" in the map
+            Nothing  -> dom               -- Try to merge it with the root data
+            Just sub -> mergeNmc sub dom  -- Or maybe drop it altogether...
+    d:ds ->
+      case domMap dom of
+        Nothing  -> emptyNmcDom
+        Just map ->
+          case M.lookup d map of
+            Nothing  -> emptyNmcDom
+            Just sub -> descendNmc ds sub
+
+-- FIXME -- I hope there exists a better way to merge records!
+mergeNmc :: NmcDom -> NmcDom -> NmcDom
+mergeNmc sub dom = dom  { domService = choose domService
+                        , domIp =          choose domIp
+                        , domIp6 =         choose domIp6
+                        , domTor =         choose domTor
+                        , domI2p =         choose domI2p
+                        , domFreenet =     choose domFreenet
+                        , domAlias =       choose domAlias
+                        , domTranslate =   choose domTranslate
+                        , domEmail =       choose domEmail
+                        , domLoc =         choose domLoc
+                        , domInfo =        choose domInfo
+                        , domNs =          choose domNs
+                        , domDelegate =    choose domDelegate
+                        , domImport =      choose domImport
+                        , domFingerprint = choose domFingerprint
+                        , domTls =         choose domTls
+                        , domDs =          choose domDs
+                        }
+  where
+    choose :: (NmcDom -> Maybe a) -> Maybe a
+    choose field = case field dom of
+      Nothing -> field sub
+      Just x  -> Just x