From b0c8a2dae29482014bcb8794a18c0aef24abe683 Mon Sep 17 00:00:00 2001
From: Eugene Crosser <crosser@average.org>
Date: Sun, 30 Mar 2014 00:59:43 +0400
Subject: [PATCH] make pdnsOut more composable

---
 PowerDns.hs      |  7 +++++--
 pdns-pipe-nmc.hs | 26 ++++++++++++--------------
 2 files changed, 17 insertions(+), 16 deletions(-)

diff --git a/PowerDns.hs b/PowerDns.hs
index cb685dd..165b80e 100644
--- a/PowerDns.hs
+++ b/PowerDns.hs
@@ -63,5 +63,8 @@ pdnsParse ver s =
                                             })
       _                         -> Left $ "Unparseable PDNS Request: " ++ s
 
-pdnsOut :: RRType -> NmcDom -> String
-pdnsOut _ d = show d
+pdnsOut :: Int -> RRType -> Either String NmcDom -> String
+pdnsOut ver _ d =
+  case d of
+    Left  err -> "LOG Error: " ++ err ++ "\nFAIL\n"
+    Right dom -> "DATA\n" ++ (show dom) ++ "\nEND\n" --FIXME
diff --git a/pdns-pipe-nmc.hs b/pdns-pipe-nmc.hs
index a3fc8c7..b010bac 100644
--- a/pdns-pipe-nmc.hs
+++ b/pdns-pipe-nmc.hs
@@ -5,7 +5,7 @@ module Main where
 import Control.Monad
 import qualified Data.ByteString.Char8 as C (pack, unpack)
 import qualified Data.ByteString.Lazy.Char8 as L (pack, unpack)
-import Data.ByteString.Lazy as BS hiding (reverse, putStrLn)
+import Data.ByteString.Lazy as BS hiding (reverse, putStr, putStrLn)
 import Data.List.Split
 import Data.Aeson (encode, decode, Value(..))
 import Network.HTTP.Types
@@ -55,6 +55,8 @@ qRsp rsp =
 
 -- NMC interface
 
+descend subdom dom = dom
+
 queryNmc :: Manager -> Config -> String -> String
          -> IO (Either String NmcDom)
 queryNmc mgr cfg fqdn qid = do
@@ -62,7 +64,9 @@ queryNmc mgr cfg fqdn qid = do
     "bit":dn:xs -> do
       rsp <- runResourceT $
              httpLbs (qReq cfg (L.pack ("d/" ++ dn)) (L.pack qid)) mgr
-      return $ qRsp rsp
+      return $ case qRsp rsp of
+        Left  err -> Left err
+        Right dom -> Right $ descend xs dom
     _           ->
       return $ Left "Only \".bit\" domain is supported"
 
@@ -92,24 +96,18 @@ main = do
   forever $ do
     l <- getLine
     case pdnsParse ver l of
-      Left e -> putStrLn $ "ERROR\t" ++ e
+      Left e -> putStrLn $ "FAIL\t" ++ e
       Right preq -> do
         case preq of
-          PdnsRequestQ qname qtype id _ _ _ -> do
-            ncres <- queryNmc mgr cfg qname id
-            case ncres of
-              Left  e   -> putStrLn $ "ERROR\t" ++ e
-              Right dom -> putStrLn $ pdnsOut qtype dom
+          PdnsRequestQ qname qtype id _ _ _ ->
+            queryNmc mgr cfg qname id >>= putStr . (pdnsOut ver qtype)
           PdnsRequestAXFR xfrreq ->
-            putStrLn ("ERROR\tNo support for AXFR " ++ xfrreq)
-          PdnsRequestPing -> putStrLn "OK"
+            putStrLn ("FAIL\tNo support for AXFR " ++ xfrreq)
+          PdnsRequestPing -> putStrLn "END"
 
 -- for testing
 
 ask str = do
   cfg <- readConfig confFile
   mgr <- newManager def
-  ncres <- queryNmc mgr cfg str "test-req-id"
-  case ncres of
-    Left  e   -> putStrLn $ "ERROR\t" ++ e
-    Right dom -> putStrLn $ pdnsOut RRTypeANY dom
+  queryNmc mgr cfg str "test-req-id" >>= putStr . (pdnsOut 1 RRTypeANY)
-- 
2.39.2