add handleskat routine

src/Skat/Preperation.hs

@@ -93,11 +93,16 @@ initGame single bid = do
     -- ask if player wants to play hand
     noSkat <- askHand (bidder bds single) bid
     -- either return piles or ask for skat cards and modify piles
-    ps' <- if noSkat then return ps else do
-        let skat = skatCards ps
-        skat' <- askSkat (bidder bds single) bid skat
-        return $ moveToSkat single skat' ps
+    ps' <- if noSkat then return ps else handleSkat (bidder bds single) bid ps
     -- ask for game kind
     (Colour col _) <- askGame (bidder bds single) bid
     -- construct skat env
     return $ mkSkatEnv ps Nothing col (toPlayers single bds) Hand1
+
+handleSkat :: BD -> Bid -> Piles -> Preperation Piles
+handleSkat bd bid ps = do
+    let skat = skatCards ps
+    skat' <- askSkat bd bid skat
+    case moveToSkat (hand bd) skat' ps of
+        Just correct -> return correct
+        Nothing -> handleSkat bd bid ps