1 files changed, 28 insertions, 0 deletions
diff --git a/src/client/Model/InitResult.elm b/src/client/Model/InitResult.elm
new file mode 100644
index 0000000..7ce0be2
--- /dev/null
+++ b/src/client/Model/InitResult.elm
@@ -0,0 +1,28 @@
+module Model.InitResult exposing
+  ( InitResult(..)
+  , initResultDecoder
+  )
+
+import Json.Decode as Decode exposing (Decoder)
+
+import Model.Init exposing (Init, initDecoder)
+
+type InitResult =
+  InitEmpty
+  | InitSuccess Init
+  | InitError String
+
+initResultDecoder : Decoder InitResult
+initResultDecoder = (Decode.field "tag" Decode.string) |> Decode.andThen initResultDecoderWithTag
+
+initResultDecoderWithTag : String -> Decoder InitResult
+initResultDecoderWithTag tag =
+  case tag of
+    "InitEmpty" ->
+      Decode.succeed InitEmpty
+    "InitSuccess" ->
+      Decode.map InitSuccess (Decode.field "contents" initDecoder)
+    "InitError" ->
+      Decode.map InitError (Decode.field "contents" Decode.string)
+    _ ->
+      Decode.fail <| "got " ++ tag ++ " for InitResult"