module NmcDom ( NmcDom(..)
, emptyNmcDom
- , descendNmc
- , queryDom
+ , seedNmcDom
+ , descendNmcDom
) where
import Data.ByteString.Lazy (ByteString)
-import Data.Text as T (unpack)
+import qualified Data.Text as T (unpack)
import Data.List.Split
import Data.Char
-import Data.Map as M (Map, lookup)
+import Data.Map as M (Map, lookup, delete, size)
import Control.Applicative ((<$>), (<*>), empty)
import Data.Aeson
, domInfo :: Maybe Value
, domNs :: Maybe [String]
, domDelegate :: Maybe [String]
- , domImport :: Maybe [[String]]
+ , domImport :: Maybe String
, domMap :: Maybe (Map String NmcDom)
, domFingerprint :: Maybe [String]
, domTls :: Maybe (Map String
Nothing Nothing Nothing Nothing Nothing Nothing
Nothing Nothing Nothing Nothing Nothing Nothing
-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
+mergeNmcDom :: NmcDom -> NmcDom -> NmcDom
+mergeNmcDom sub dom = dom { domService = choose domService
, domIp = choose domIp
, domIp6 = choose domIp6
, domTor = choose domTor
, domNs = choose domNs
, domDelegate = choose domDelegate
, domImport = choose domImport
+ , domMap = choose domMap
, domFingerprint = choose domFingerprint
, domTls = choose domTls
, domDs = choose domDs
Just x -> Just x
-- | Perform query and return error string or parsed domain object
-queryDom ::
- (ByteString -> IO (Either String ByteString)) -- ^ query operation action
- -> ByteString -- ^ key
- -> IO (Either String NmcDom) -- ^ error string or domain
-queryDom queryOp key = do
+queryNmcDom ::
+ (String -> IO (Either String ByteString)) -- ^ query operation action
+ -> String -- ^ key
+ -> IO (Either String NmcDom) -- ^ error string or domain
+queryNmcDom queryOp key = do
l <- queryOp key
case l of
Left estr -> return $ Left estr
Right str -> case decode str :: Maybe NmcDom of
Nothing -> return $ Left $ "Unparseable value: " ++ (show str)
Just dom -> return $ Right dom
+
+-- | Try to fetch "import" object and merge it into the base domain
+-- Original "import" element is removed, but new imports from the
+-- imported objects are processed recursively until there are none.
+mergeImport ::
+ (String -> IO (Either String ByteString)) -- ^ query operation action
+ -> NmcDom -- ^ base domain
+ -> IO (Either String NmcDom) -- ^ result with merged import
+mergeImport queryOp base = do
+ let
+ mbase = mergeSelf base
+ base' = mbase {domImport = Nothing}
+ -- print base
+ case domImport mbase of
+ Nothing -> return $ Right base'
+ Just key -> do
+ sub <- queryNmcDom queryOp key
+ case sub of
+ Left e -> return $ Left e
+ Right sub' -> mergeImport queryOp $ sub' `mergeNmcDom` base'
+
+-- | If there is an element in the map with key "", merge the contents
+-- and remove this element. Do this recursively.
+mergeSelf :: NmcDom -> NmcDom
+mergeSelf base =
+ let
+ map = domMap base
+ base' = base {domMap = removeSelf map}
+ removeSelf Nothing = Nothing
+ removeSelf (Just map) = if size map' == 0 then Nothing else Just map'
+ where map' = M.delete "" map
+ in
+ case map of
+ Nothing -> base'
+ Just map' ->
+ case M.lookup "" map' of
+ Nothing -> base'
+ Just sub -> (mergeSelf sub) `mergeNmcDom` base'
+
+-- | Presence of some elements require removal of some others
+normalizeDom :: NmcDom -> NmcDom
+normalizeDom dom = foldr id dom [ nsNormalizer
+ , translateNormalizer
+ ]
+ where
+ nsNormalizer dom = case domNs dom of
+ Nothing -> dom
+ Just ns -> emptyNmcDom { domNs = domNs dom, domEmail = domEmail dom }
+ translateNormalizer dom = case domTranslate dom of
+ Nothing -> dom
+ Just tr -> dom { domMap = Nothing }
+
+-- | Merge imports and Selfs and follow the maps tree to get dom
+descendNmcDom ::
+ (String -> IO (Either String ByteString)) -- ^ query operation action
+ -> [String] -- ^ subdomain chain
+ -> NmcDom -- ^ base domain
+ -> IO (Either String NmcDom) -- ^ fully processed result
+descendNmcDom queryOp subdom base = do
+ base' <- mergeImport queryOp base
+ case subdom of
+ [] -> return $ fmap normalizeDom base'
+ d:ds ->
+ case base' of
+ Left err -> return base'
+ Right base'' ->
+ case domMap base'' of
+ Nothing -> return $ Right emptyNmcDom
+ Just map ->
+ case M.lookup d map of
+ Nothing -> return $ Right emptyNmcDom
+ Just sub -> descendNmcDom queryOp ds sub
+
+-- | Initial NmcDom populated with "import" only, suitable for "descend"
+seedNmcDom ::
+ String -- ^ domain key (without namespace prefix)
+ -> NmcDom -- ^ resulting seed domain
+seedNmcDom dn = emptyNmcDom { domImport = Just ("d/" ++ dn)}
projects / pdns-pipe-nmc.git / blobdiff