Added back Remote Cursors

shared/types.ts

@@ -22,6 +22,19 @@ export interface CanvasUpdate {
   pixels: Pixel[];
 }
 
+export interface PaintRequest {
+  pixels: Pixel[];
+  timestamp: number;
+}
+
+export interface PaintAck {
+  success: boolean;
+  saved: number;
+  conflicts: number;
+  pixels?: Pixel[];
+  message?: string;
+}
+
 export interface LoginRequest {
   username: string;
   password: string;
@@ -40,9 +53,15 @@ export interface AuthResponse {
 export interface SocketEvents {
   'join-canvas': (token: string) => void;
   'cursor-move': (cursor: Cursor) => void;
-  'paint-pixels': (pixels: Pixel[]) => void;
+  'paint-pixels': (request: PaintRequest, callback: (ack: PaintAck) => void) => void;
   'canvas-update': (update: CanvasUpdate) => void;
   'cursor-update': (cursors: Cursor[]) => void;
   'canvas-state': (pixels: Pixel[]) => void;
   'error': (message: string) => void;
 }
+
+export interface PendingPixel {
+  pixel: Pixel;
+  timestamp: number;
+  retries: number;
+}