handle "import"

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

diff --git a/NmcTransform.hs b/NmcTransform.hs
index c753f80165e9d71c7337cd3cd145af5fe772eca7..ef4300605d7dbebcbf777f34f2a6ccabab9004c5 100644 (file)
--- a/NmcTransform.hs
+++ b/NmcTransform.hs
@@ -4,7 +4,9 @@ module NmcTransform ( seedNmcDom
 
 import Prelude hiding (lookup)
 import Data.ByteString.Lazy (ByteString)
-import Data.Map (empty, lookup, delete, size, singleton)
+import Data.Text.Lazy (splitOn, pack, unpack)
+import Data.Map.Lazy (empty, lookup, delete, size, singleton
+                     , foldrWithKey, insert, insertWith)
 import Control.Monad (foldM)
 import Data.Aeson (decode)
 
@@ -33,21 +35,21 @@ mergeImport ::
   -> IO (Either String NmcDom)              -- ^ result with merged import
 mergeImport queryOp depth base = do
   let
-    mbase = (expandSrv . mergeSelf) base
+    mbase = (expandSrv . splitSubdoms . mergeSelf) base
     base' = mbase {domImport = Nothing}
   -- print base
   if depth <= 0 then return $ Left "Nesting of imports is too deep"
-  else case domImport mbase of
-    Nothing  -> return $ Right base'
-    Just keys -> foldM mergeImport1 (Right base') keys
-      where
-        mergeImport1 (Left  err) _   = return $ Left err
-        mergeImport1 (Right acc) key = do
-          sub <- queryNmcDom queryOp key
-          case sub of
-            Left  err  -> return $ Left err
-            Right sub' -> mergeImport queryOp (depth - 1) $
-                                sub' `mergeNmcDom` acc
+  else case ((domDelegate mbase), (domImport mbase)) of
+    (Nothing,  Nothing  ) -> return $ Right base'
+    (Nothing,  Just keys) -> foldM mergeImport1 (Right base') keys
+    (Just key, _        ) -> mergeImport1 (Right emptyNmcDom) key
+  where
+    mergeImport1 (Left  err) _   = return $ Left err -- can never happen
+    mergeImport1 (Right acc) key = do
+      sub <- queryNmcDom queryOp key
+      case sub of
+        Left  err  -> return $ Left err
+        Right sub' -> mergeImport queryOp (depth - 1) $ sub' `mergeNmcDom` acc
 
 -- | If there is an element in the map with key "", merge the contents
 --   and remove this element. Do this recursively.
@@ -96,6 +98,27 @@ expandSrv base =
                    && srvPort sr == 25
                 then Just [(show (srvPrio sr)) ++ " " ++ (srvHost sr)]
                 else Nothing
+
+-- | Convert map elements of the form "subN...sub2.sub1.dom.bit"
+--   into nested map and merge it
+splitSubdoms :: NmcDom -> NmcDom
+splitSubdoms base =
+  let
+    base' = base { domMap = Nothing }
+  in
+    case domMap base of
+      Nothing -> base'
+      Just sdmap -> (emptyNmcDom { domMap = Just sdmap' }) `mergeNmcDom` base'
+        where
+          sdmap' = foldrWithKey stow empty sdmap
+          stow fqdn sdom acc = insertWith mergeNmcDom fqdn' sdom' acc
+            where
+              (fqdn', sdom') =
+                nest (map unpack (splitOn (pack ".") (pack fqdn)), sdom)
+              nest ([], v)   = (fqdn, v) -- can split result be empty?
+              nest ([k], v)  = (k, v)
+              nest (k:ks, v) =
+                nest (ks, emptyNmcDom { domMap = Just (singleton k v) })
  
 -- | Presence of some elements require removal of some others
 normalizeDom :: NmcDom -> NmcDom