1 files changed, 24 insertions, 0 deletions
diff --git a/picarones-elm/src/Protocol.elm b/picarones-elm/src/Protocol.elm
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+++ b/picarones-elm/src/Protocol.elm
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+module Protocol exposing (State, encodeState, decodeState)
+
+import Json.Decode as D
+import Json.Encode as E
+
+{- PROTOCOL -}
+
+ -- for now, this is still very boring and just has one field:
+type alias State = { state : Int }
+
+encodeState : State -> String
+encodeState state = 
+    E.object [ ("state", E.int state.state) ]
+    |> E.encode 0
+
+
+stateDecoder : D.Decoder State
+stateDecoder = D.map State (D.field "state" D.int)
+
+decodeState : String -> Maybe State
+decodeState text = case D.decodeString (D.nullable stateDecoder) text of
+    Err e -> Nothing
+    Ok value -> value
+