From df6292eef942c11b9ac58b337f29641dae404116 Mon Sep 17 00:00:00 2001
From: Joe Crayne <joe@jerkface.net>
Date: Thu, 6 Dec 2018 21:32:55 -0500
Subject: Intances for TCP.NodeInfo.

---
 src/Network/Tox/NodeId.hs |  2 ++
 src/Network/Tox/TCP.hs    | 40 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 42 insertions(+)

(limited to 'src/Network/Tox')

diff --git a/src/Network/Tox/NodeId.hs b/src/Network/Tox/NodeId.hs
index 56ddf03c..98be1e3a 100644
--- a/src/Network/Tox/NodeId.hs
+++ b/src/Network/Tox/NodeId.hs
@@ -335,6 +335,8 @@ instance Read NodeInfo where
     return $ NodeInfo nid ip port
 
 -- The Hashable instance depends only on the IP address and port number.
+--
+-- TODO: Why is the node id excluded?
 instance Hashable NodeInfo where
   hashWithSalt s ni = hashWithSalt s (nodeIP ni , nodePort ni)
   {-# INLINE hashWithSalt #-}
diff --git a/src/Network/Tox/TCP.hs b/src/Network/Tox/TCP.hs
index 5b5b4f4e..eede869f 100644
--- a/src/Network/Tox/TCP.hs
+++ b/src/Network/Tox/TCP.hs
@@ -9,11 +9,18 @@ import Control.Concurrent
 import Control.Concurrent.STM
 import Control.Monad
 import Crypto.Random
+import Data.Aeson (ToJSON(..),FromJSON(..))
+import qualified Data.Aeson as JSON
 import Data.Functor.Contravariant
 import Data.Functor.Identity
+import Data.Hashable
+import qualified Data.HashMap.Strict as HashMap
 import Data.IP
 import Data.Serialize
+import Data.Word
+import qualified Data.Vector as Vector
 import Network.Socket (SockAddr(..))
+import qualified Text.ParserCombinators.ReadP as RP
 
 import Crypto.Tox
 import Data.ByteString (hPut,hGet,ByteString)
@@ -39,12 +46,45 @@ data NodeInfo = NodeInfo
     { udpNodeInfo :: UDP.NodeInfo
     , tcpPort     :: PortNumber
     }
+ deriving (Eq,Ord)
 
 type NodeId = UDP.NodeId
 
+-- example:
+-- KEyW2Bm.S-DpIGp72380BAfgintUWX1KX.6ZU.4m5Ex@80.99.99.99:33400{tcp:443}
 instance Show NodeInfo where
     show (NodeInfo udp port) = show udp ++ "{tcp:"++show port++"}"
 
+instance Read NodeInfo where
+    readsPrec _ = RP.readP_to_S $ do
+        udp <- RP.readS_to_P reads
+        port <- RP.between (RP.char '{') (RP.char '}') $ do
+                    mapM_ RP.char ("tcp:" :: String)
+                    w16 <- RP.readS_to_P reads
+                    return $ fromIntegral (w16 :: Word16)
+        return $ NodeInfo udp port
+
+instance ToJSON NodeInfo where
+    toJSON (NodeInfo udp port) = case (toJSON udp) of
+        JSON.Object tbl -> JSON.Object $ HashMap.insert "tcp_ports"
+                                                        (JSON.Array $ Vector.fromList
+                                                            [JSON.Number (fromIntegral port)])
+                                                        tbl
+        x               -> x -- Shouldn't happen.
+
+instance FromJSON NodeInfo where
+    parseJSON json = do
+        udp <- parseJSON json
+        port <- case json of
+            JSON.Object v -> do
+                portnum:_ <- v JSON..: "tcp_ports"
+                return  (fromIntegral (portnum :: Word16))
+            _ -> fail "TCP.NodeInfo: Expected JSON object."
+        return $ NodeInfo udp port
+
+instance Hashable NodeInfo where
+    hashWithSalt s n = hashWithSalt s (udpNodeInfo n)
+
 nodeId :: NodeInfo -> NodeId
 nodeId ni = UDP.nodeId $ udpNodeInfo ni
 
-- 
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