From d101cc4829248cb2b7dc38ce5195e7ee4c534d2a Mon Sep 17 00:00:00 2001
From: Deveshi Dwivedi <deveshigurgaon@gmail.com>
Date: Thu, 20 Jun 2024 20:10:59 +0530
Subject: [PATCH] handle undo

---
 modules/room/helpers/Canvas.helpers.ts | 33 +++++++++++++++++++++++++-
 1 file changed, 32 insertions(+), 1 deletion(-)

diff --git a/modules/room/helpers/Canvas.helpers.ts b/modules/room/helpers/Canvas.helpers.ts
index 4303383..61ca91f 100644
--- a/modules/room/helpers/Canvas.helpers.ts
+++ b/modules/room/helpers/Canvas.helpers.ts
@@ -13,9 +13,40 @@ export const drawFromSocket = (
       tempCtx.beginPath();
       socketMoves.forEach(([x,y])=>{
         tempCtx.lineTo(x,y);
-        tempCtx.stroke();
       });
+      tempCtx.stroke();
       tempCtx.closePath();
       afterDraw();
     }
   };
+
+  export const drawOnUndo = (
+    ctx: CanvasRenderingContext2D,
+    savedMoves: [number, number][][],
+    users: {[key:string]: [number, number][][]}
+  ) => {
+    ctx.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height);
+  
+    Object.values(users).forEach((user)=>{
+      user.forEach((userMove)=>{
+        ctx.beginPath();
+        userMove.forEach(([x,y])=>{
+          ctx.lineTo(x,y);
+        });
+        ctx.stroke();
+        ctx.closePath();
+      });
+    });
+
+    savedMoves.forEach((movesArr)=> {
+      ctx.beginPath();
+      movesArr.forEach(([x,y])=>{
+        ctx.lineTo(x,y);
+      });
+      ctx.stroke();
+      ctx.closePath();  
+    });
+
+
+  };
+  
\ No newline at end of file