3 files changed, 23 insertions, 6 deletions
diff --git a/server/lib/Cafp/Game.hs b/server/lib/Cafp/Game.hs
index 3a67ef6..336b85c 100644
--- a/server/lib/Cafp/Game.hs
+++ b/server/lib/Cafp/Game.hs
@@ -18,12 +18,13 @@ module Cafp.Game
 
 import           Cafp.Messages
 import           Control.Lens        (at, ix, over, to, (%~), (&), (.~), (^.),
-                                      (^?))
-import           Control.Lens.TH     (makeLenses)
+                                      (^?), _2)
+import           Control.Lens.TH     (makeLenses, makePrisms)
 import qualified Data.HashMap.Strict as HMS
 import           Data.Maybe          (fromMaybe)
 import           Data.Text           (Text)
 import qualified Data.Text           as T
+import qualified Data.Vector         as V
 
 type PlayerId = Int
 
@@ -38,6 +39,7 @@ data Game = Game
     , _gameNextPlayerId :: !Int
     } deriving (Show)
 
+makePrisms ''Table
 makeLenses ''Game
 
 newGame :: Cards -> Game
@@ -59,10 +61,22 @@ joinGame game =
 leaveGame :: PlayerId -> Game -> Game
 leaveGame pid = over gamePlayers $ HMS.delete pid
 
+validWhiteCard :: Cards -> WhiteCard -> Bool
+validWhiteCard cards (WhiteCard c) =
+    let len = V.length $ cardsWhite cards in c >= 0 && c < len
+
 processClientMessage :: PlayerId -> ClientMessage -> Game -> Game
 processClientMessage pid msg game = case msg of
     ChangeMyName name ->
         game & gamePlayers . ix pid .~ name
+    ProposeWhiteCards c
+        -- Bad card proposed.
+        | not $ validWhiteCard (game ^. gameCards) c -> game
+        -- Proposal already made.
+        | Just _ <- game ^? gameTable . _TableProposing . _2 . at pid -> game
+        -- TODO: Check that the card is in the hand of the player.
+        | otherwise                                  ->
+            game & gameTable . _TableProposing . _2 . at pid .~ Just c
 
 gameViewForPlayer :: PlayerId -> Game -> GameView
 gameViewForPlayer self game =
diff --git a/server/lib/Cafp/Main/Server.hs b/server/lib/Cafp/Main/Server.hs
index e6e353f..13b1f6b 100644
--- a/server/lib/Cafp/Main/Server.hs
+++ b/server/lib/Cafp/Main/Server.hs
@@ -22,6 +22,7 @@ import qualified Data.Text.Encoding             as T
 import qualified Data.Text.IO                   as T
 import qualified Data.Text.Lazy                 as TL
 import qualified Data.Vector                    as V
+import qualified Data.Vector                    as V
 import qualified Network.Wai                    as Wai
 import qualified Network.Wai.Handler.Warp       as Warp
 import qualified Network.Wai.Handler.WebSockets as WaiWs
@@ -51,7 +52,7 @@ readCards = Cards
     <$> fmap parseCards (T.readFile "assets/black.txt")
     <*> fmap parseCards (T.readFile "assets/white.txt")
   where
-    parseCards =
+    parseCards = V.fromList .
         filter (not . T.isPrefixOf "#") . filter (not . T.null) . T.lines
 
 newServer :: IO Server
diff --git a/server/lib/Cafp/Messages.hs b/server/lib/Cafp/Messages.hs
index de0ae26..ff3f612 100644
--- a/server/lib/Cafp/Messages.hs
+++ b/server/lib/Cafp/Messages.hs
@@ -9,7 +9,8 @@ module Cafp.Messages
     , ClientMessage (..)
     ) where
 
-import           Data.Text  (Text)
+import           Data.Text   (Text)
+import           Data.Vector (Vector)
 import           Elm.Derive
 
 data BlackCard = BlackCard Int deriving (Show)
@@ -17,8 +18,8 @@ data BlackCard = BlackCard Int deriving (Show)
 data WhiteCard = WhiteCard Int deriving (Show)
 
 data Cards = Cards
-    { cardsBlack :: [Text]
-    , cardsWhite :: [Text]
+    { cardsBlack        :: Vector Text
+    , cardsWhite        :: Vector Text
     } deriving (Show)
 
 data TableView
@@ -41,6 +42,7 @@ data ServerMessage
 
 data ClientMessage
     = ChangeMyName Text
+    | ProposeWhiteCards WhiteCard  -- TODO: Needs to be a list?
     deriving (Show)
 
 deriveBoth defaultOptions ''BlackCard