add a mutable state class

src/Game/Library.fs

@@ -1,6 +1,5 @@
 module Game.Game
 
-
 type WallType =
     | NS
     | EW
@@ -21,6 +20,8 @@ type Env =
     | Floor
     | Trap
     | Player
+    
+type Board = Env list list
    
 type Cast = {
     spell: string
@@ -36,11 +37,6 @@ type Location =
         x: int
         y: int
     }
-type State =
-    {
-        board: string
-        playerLocation: Location
-    }
 
 let envToString e =
     match e with
@@ -63,4 +59,37 @@ let floorToString = List.fold (fun f r -> f + rowToString r + "\n") ""
 
 let rowToStringList = List.map envToString
 
-let floorToStringLists = List.map rowToStringList
+let floorToStringLists = List.map rowToStringList
+
+let newBoard() = [
+         [ Wall Corner; Wall EW; Wall EW; Wall EW; Wall Corner ];
+         [ Wall NS; Floor; Floor; Floor; Wall NS ];
+         [ Wall NS; Floor; Floor; Floor; Wall NS ];
+         [ Wall NS; Floor; Floor; Floor; Wall NS ];
+         [ Wall Corner; Wall EW; Wall EW; Wall EW; Wall Corner ]
+     ]
+
+type StateJSON =
+    {
+        board: string
+        playerLocation: Location
+    }
+
+type State(board: Board) =
+    member this.boardString = floorToString board
+    member this.playerLocation = { x = 1; y = 1 }
+    member this.JSON = {
+        board = this.boardString
+        playerLocation = this.playerLocation
+    }
+    member this.cmd cmd =
+        match cmd with
+            | Move d ->
+                match d with
+                    | North -> this.playerLocation = { x = this.playerLocation.x + 1; y = this.playerLocation.y }
+                    | South -> this.playerLocation = { x = this.playerLocation.x - 1; y = this.playerLocation.y }
+                    | East -> this.playerLocation = { x = this.playerLocation.x; y = this.playerLocation.y + 1 }
+                    | West -> this.playerLocation = { x = this.playerLocation.x; y = this.playerLocation.y - 1 }
+            | _ -> true
+
+let mutable Current = State(newBoard())

src/Server/Program.fs

@@ -31,17 +31,11 @@ let mapHandler() =
         [ Wall NS; Floor; Floor; Floor; Wall NS ];
         [ Wall Corner; Wall EW; Wall EW; Wall EW; Wall Corner ]
     ]
-    let state = {
-        board = floorToString floor
-        playerLocation = { x = 1; y = 1 }
-    }
-    json state
-
-type Direction = string
+    json Current.JSON
 
 let moveHandler (next: HttpFunc) (ctx: HttpContext) =
     task {
-        let! direction = ctx.BindJsonAsync<Direction>()
+        let! cmd = ctx.BindJsonAsync<Command>()
         return! (mapHandler()) next ctx
     }
 

src/Server/Views.fs

@@ -29,6 +29,7 @@ module Views =
     let display() =
         div [ _id "app" ] [
             div [ _id "game" ] []
+            button [ _id "south"; _value "south" ] [ Text "South" ]
         ]
 
     let index() =