From f5a7875d605010540ec7c9c8f2a3ff4ed0702597 Mon Sep 17 00:00:00 2001
From: Jasper Van der Jeugt
Date: Thu, 30 Jul 2020 16:16:52 +0200
Subject: Allow people to change their name

---
 client/src/Client.elm   | 62 +++++++++++++++++++++++++++++++++++++++++++++----
 client/src/Messages.elm | 27 ++++++++++++++++++---
 2 files changed, 82 insertions(+), 7 deletions(-)

(limited to 'client')

diff --git a/client/src/Client.elm b/client/src/Client.elm
index 442f089..e5afa74 100644
--- a/client/src/Client.elm
+++ b/client/src/Client.elm
@@ -2,7 +2,10 @@ port module Client exposing (main)
 
 import Browser
 import Html exposing (Html)
+import Html.Attributes
+import Html.Events
 import Json.Decode
+import Json.Encode
 import Messages exposing (GameView)
 import Url exposing (Url)
 
@@ -13,6 +16,10 @@ type Msg
     = Ignore
     | Send
     | WebSocketIn String
+    -- Name changes
+    | StartChangingName
+    | ChangeName String
+    | SubmitNewName
 
 type Model
     = Error String
@@ -21,6 +28,7 @@ type Model
         }
     | Game
         { view : GameView
+        , changingName : Maybe String
         }
 
 parseRoomId : Url -> Result String String
@@ -39,16 +47,38 @@ view model = case model of
             [Html.text <| "Connecting to room " ++ state.roomId ++ "..."]
         ]
     Game game ->
-        [ Html.h1 [] [Html.text "Players"]
+        [ Html.h1 [] [Html.text "Opponents"]
         , Html.ul [] <| List.map
             (\p -> Html.li [] [Html.text p])
-            game.view.players
-        ]
+            game.view.opponents
+        , Html.h1 [] [Html.text "You"]
+        ] ++
+        (case game.changingName of
+            Nothing ->
+                [ Html.p []
+                    [Html.text game.view.playerName]
+                , Html.button
+                    [Html.Events.onClick StartChangingName]
+                    [Html.text "change"]
+                ]
+            Just name ->
+                [ Html.input
+                    [ Html.Attributes.value name
+                    , Html.Events.onInput ChangeName
+                    ]
+                    []
+                , Html.button
+                    [Html.Events.onClick SubmitNewName]
+                    [Html.text "change"]
+                ])
 
 
 subscriptions : Model -> Sub Msg
 subscriptions model = webSocketIn WebSocketIn
 
+send : Messages.ClientMessage -> Cmd Msg
+send = webSocketOut << Json.Encode.encode 0 << Messages.jsonEncClientMessage
+
 update : Msg -> Model -> (Model, Cmd Msg)
 update msg model = case msg of
     Ignore -> (model, Cmd.none)
@@ -60,7 +90,31 @@ update msg model = case msg of
                 Debug.log ("Welcome " ++ String.fromInt playerId) (model, Cmd.none)
             Ok Messages.Bye -> Debug.log "Bye" (model, Cmd.none)
             Ok (Messages.SyncGameView gameView) ->
-                (Game {view = gameView}, Cmd.none)
+                case model of
+                    Game game -> (Game {game | view = gameView}, Cmd.none)
+                    _ ->
+                        ( Game
+                            { view = gameView
+                            , changingName = Nothing
+                            }
+                        , Cmd.none
+                        )
+
+    StartChangingName -> case model of
+        Game game ->
+            (Game {game | changingName = Just game.view.playerName}, Cmd.none)
+        _ -> (model, Cmd.none)
+    ChangeName name -> case model of
+        Game game -> (Game {game | changingName = Just name}, Cmd.none)
+        _ -> (model, Cmd.none)
+    SubmitNewName -> case model of
+        Game game ->
+            ( Game {game | changingName = Nothing}
+            , case game.changingName of
+                Nothing   -> Cmd.none
+                Just name -> send <| Messages.ChangeName name
+            )
+        _ -> (model, Cmd.none)
 
 main : Program () Model Msg
 main = Browser.application
diff --git a/client/src/Messages.elm b/client/src/Messages.elm
index 2239a74..730a66d 100644
--- a/client/src/Messages.elm
+++ b/client/src/Messages.elm
@@ -9,16 +9,23 @@ import Set exposing (Set)
 
 
 type alias GameView  =
-   { players: (List String)
+   { opponents: (List String)
+   , playerName: String
    }
 
 jsonDecGameView : Json.Decode.Decoder ( GameView )
 jsonDecGameView =
-   Json.Decode.succeed (\pplayers -> {players = pplayers}) |> custom (Json.Decode.list (Json.Decode.string))
+   Json.Decode.succeed (\popponents pplayerName -> {opponents = popponents, playerName = pplayerName})
+   |> required "opponents" (Json.Decode.list (Json.Decode.string))
+   |> required "playerName" (Json.Decode.string)
 
 jsonEncGameView : GameView -> Value
 jsonEncGameView  val =
-   (Json.Encode.list Json.Encode.string) val.players
+   Json.Encode.object
+   [ ("opponents", (Json.Encode.list Json.Encode.string) val.opponents)
+   , ("playerName", Json.Encode.string val.playerName)
+   ]
+
 
 
 type ServerMessage  =
@@ -44,3 +51,17 @@ jsonEncServerMessage  val =
     in encodeSumObjectWithSingleField keyval val
 
 
+
+type ClientMessage  =
+    ChangeName String
+
+jsonDecClientMessage : Json.Decode.Decoder ( ClientMessage )
+jsonDecClientMessage =
+    Json.Decode.lazy (\_ -> Json.Decode.map ChangeName (Json.Decode.string))
+
+
+jsonEncClientMessage : ClientMessage -> Value
+jsonEncClientMessage (ChangeName v1) =
+    Json.Encode.string v1
+
+
-- 
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