From dfcab14e4d593f6a51db3fa5cf61f0358dc0f280 Mon Sep 17 00:00:00 2001
From: Joe Crayne <joe@jerkface.net>
Date: Sun, 25 Nov 2018 02:19:42 -0500
Subject: group chat invite message.

---
 src/Data/Tox/Msg.hs | 85 ++++++++++++++++++++++++++++++++++++++++++++---------
 1 file changed, 71 insertions(+), 14 deletions(-)

(limited to 'src/Data/Tox/Msg.hs')

diff --git a/src/Data/Tox/Msg.hs b/src/Data/Tox/Msg.hs
index 84fffb12..d42b092b 100644
--- a/src/Data/Tox/Msg.hs
+++ b/src/Data/Tox/Msg.hs
@@ -1,28 +1,32 @@
-{-# LANGUAGE DataKinds             #-}
-{-# LANGUAGE DefaultSignatures     #-}
-{-# LANGUAGE FlexibleInstances     #-}
-{-# LANGUAGE GADTs                 #-}
-{-# LANGUAGE KindSignatures        #-}
-{-# LANGUAGE MultiParamTypeClasses #-}
-{-# LANGUAGE PolyKinds             #-}
-{-# LANGUAGE TypeFamilies          #-}
-{-# LANGUAGE StandaloneDeriving #-}
+{-# LANGUAGE DataKinds                  #-}
+{-# LANGUAGE DefaultSignatures          #-}
+{-# LANGUAGE FlexibleInstances          #-}
+{-# LANGUAGE GADTs                      #-}
+{-# LANGUAGE GeneralizedNewtypeDeriving #-}
+{-# LANGUAGE KindSignatures             #-}
+{-# LANGUAGE MultiParamTypeClasses      #-}
+{-# LANGUAGE PolyKinds                  #-}
+{-# LANGUAGE StandaloneDeriving         #-}
+{-# LANGUAGE TypeFamilies               #-}
 module Data.Tox.Msg where
 
-import Data.ByteString       as B
+import Data.ByteString            as B
 import Data.Dependent.Sum
+import Data.Functor.Contravariant
+import Data.Functor.Identity
 import Data.GADT.Compare
 import Data.GADT.Show
-import Data.Functor.Identity
+import Data.Monoid
 import Data.Serialize
-import Data.Text             as T
-import Data.Text.Encoding    as T
+import Data.Text                  as T
+import Data.Text.Encoding         as T
 import Data.Typeable
 import Data.Word
 import GHC.TypeLits
 
 import Crypto.Tox
 import Data.PacketBuffer (compressSequenceNumbers, decompressSequenceNumbers)
+import Network.Tox.NodeId
 
 newtype Unknown = Unknown B.ByteString deriving (Eq,Show)
 newtype Padded  = Padded  B.ByteString deriving (Eq,Show)
@@ -70,7 +74,7 @@ data Msg (n :: Nat) t where
     FILE_SENDREQUEST   :: Msg 80 Unknown
     FILE_CONTROL       :: Msg 81 Unknown
     FILE_DATA          :: Msg 82 Unknown
-    INVITE_GROUPCHAT   :: Msg 95 Unknown
+    INVITE_GROUPCHAT   :: Msg 95 Invite
     INVITE_CONFERENCE  :: Msg 96 Unknown
     ONLINE_PACKET      :: Msg 97 Unknown
     DIRECT_CONFERENCE  :: Msg 98 Unknown
@@ -229,3 +233,56 @@ lossyness m = case msgbyte m of
       | 192 <= x, x < 255    -> Lossy
       | otherwise            -> Lossless
 
+
+newtype ChatID = ChatID Nonce32
+ deriving (Eq,Show,Serialize,Sized)
+
+data InviteType = GroupInvite { groupName :: Text }
+                | AccptedInvite
+                | ConfirmedInvite { inviteNodes :: [NodeInfo] }
+  deriving (Eq,Show)
+
+instance Sized InviteType where
+    size = VarSize $ \x -> case x of
+        GroupInvite name   -> B.length (T.encodeUtf8 name)
+        AccptedInvite      -> 0
+        ConfirmedInvite ns -> 0 -- TODO: size of node list.
+
+data Invite = Invite
+    { inviteChatID  :: ChatID
+    , inviteChatKey :: PublicKey
+    , invite        :: InviteType
+    }
+ deriving (Eq,Show)
+
+instance Sized Invite where
+    size = contramap inviteChatID             size
+        <> contramap (key2id . inviteChatKey) size
+        <> contramap invite                   size
+
+instance Serialize Invite where
+    get = do
+        group_packet_id <- getWord8 -- expecting 254=GP_FRIEND_INVITE
+        invite_type <- getWord8
+        chatid <- get
+        chatkey <- id2key <$> get
+        Invite chatid chatkey <$> case invite_type of
+            0 -> do bs <- remaining >>= getBytes -- TODO: size can be determined from group shared state.
+                    return $ GroupInvite $ decodeUtf8 bs
+            1 -> return AccptedInvite
+            2 -> return $ ConfirmedInvite [] -- TODO: decode nodes
+
+    put x = do
+        putWord8 254 -- GP_FRIEND_INVITE
+        putWord8 $ case invite x of
+            GroupInvite {}     -> 0 -- GROUP_INVITE
+            AccptedInvite      -> 1 -- GROUP_INVITE_ACCEPTED
+            ConfirmedInvite {} -> 2 -- GROUP_INVITE_CONFIRMATION
+        put $ inviteChatID x
+        put $ key2id $ inviteChatKey x
+        case invite x of
+            GroupInvite name   -> putByteString $ encodeUtf8 name
+            AccptedInvite      -> return ()
+            ConfirmedInvite ns -> return () -- TODO: encode nodes.
+
+instance Packet Invite where
-- 
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