From d3c4fc8d0de96e70a843141d6d003d90716eca19 Mon Sep 17 00:00:00 2001
From: karishmas6 <carishmashukla28@gmail.com>
Date: Fri, 14 Jun 2024 21:56:50 +0530
Subject: [PATCH] feat: canvas

---
 src/components/atoms/canvas.tsx | 148 ++++++++++++++++++++++++++++++++
 1 file changed, 148 insertions(+)
 create mode 100644 src/components/atoms/canvas.tsx

diff --git a/src/components/atoms/canvas.tsx b/src/components/atoms/canvas.tsx
new file mode 100644
index 00000000..33f45698
--- /dev/null
+++ b/src/components/atoms/canvas.tsx
@@ -0,0 +1,148 @@
+import React, {useCallback, useEffect, useRef} from 'react';
+import { useSocketStore } from '../../context/socket';
+import { getMappedCoordinates } from "../../helpers/inputHelpers";
+import { useGlobalInfoStore } from "../../context/globalInfo";
+
+interface CreateRefCallback {
+
+    (ref: React.RefObject<HTMLCanvasElement>): void;
+
+}
+
+interface CanvasProps {
+
+    width: number;
+
+    height: number;
+
+    onCreateRef: CreateRefCallback;
+
+}
+
+/**
+ * Interface for mouse's x,y coordinates
+ */
+export interface Coordinates {
+    x: number;
+    y: number;
+};
+
+const Canvas = ({ width, height, onCreateRef }: CanvasProps) => {
+
+    const canvasRef = useRef<HTMLCanvasElement>(null);
+    const { socket } = useSocketStore();
+    const { setLastAction, lastAction } = useGlobalInfoStore();
+
+    const notifyLastAction = (action: string) => {
+        if (lastAction !== action) {
+            setLastAction(action);
+        }
+    };
+
+    const lastMousePosition = useRef<Coordinates>({ x: 0, y: 0 });
+     //const lastWheelPosition = useRef<ScrollDeltas>({ deltaX: 0, deltaY: 0 });
+
+    const onMouseEvent = useCallback((event: MouseEvent) => {
+        if (socket) {
+            const coordinates = {
+                x: event.clientX,
+                y: event.clientY,
+            }
+            switch (event.type) {
+                case 'mousedown':
+                    // const clickCoordinates = getMappedCoordinates(event, canvasRef.current, width, height);
+                    socket.emit('input:mousedown', {
+                        x: event.clientX,
+                        y: event.clientY,
+                    });
+                    notifyLastAction('click');
+                    break;
+                case 'mousemove':
+                    const coordinates = getMappedCoordinates(event, canvasRef.current, width, height);
+                    if (lastMousePosition.current.x !== coordinates.x ||
+                      lastMousePosition.current.y !== coordinates.y) {
+                        lastMousePosition.current = {
+                            x: coordinates.x,
+                            y: coordinates.y,
+                        };
+                        socket.emit('input:mousemove',  {
+                            x: coordinates.x,
+                            y: coordinates.y,
+                        });
+                        notifyLastAction('move');
+                    }
+                    break;
+                case 'wheel':
+                    const wheelEvent = event as WheelEvent;
+                    const deltas = {
+                        deltaX: Math.round(wheelEvent.deltaX),
+                        deltaY: Math.round(wheelEvent.deltaY),
+                    };
+                    socket.emit('input:wheel', deltas);
+                    notifyLastAction('scroll');
+                    break;
+                default:
+                    console.log('Default mouseEvent registered');
+                    return;
+            }
+        }
+    }, [socket]);
+
+    const onKeyboardEvent = useCallback((event: KeyboardEvent) => {
+        if (socket) {
+            switch (event.type) {
+                case 'keydown':
+                    socket.emit('input:keydown', { key: event.key, coordinates: lastMousePosition.current });
+                    notifyLastAction(`${event.key} pressed`);
+                    break;
+                case 'keyup':
+                    socket.emit('input:keyup', event.key);
+                    break;
+                default:
+                    console.log('Default keyEvent registered');
+                    return;
+            }
+        }
+    }, [socket]);
+
+
+    useEffect(() => {
+        if (canvasRef.current) {
+            onCreateRef(canvasRef);
+            canvasRef.current.addEventListener('mousedown', onMouseEvent);
+            canvasRef.current.addEventListener('mousemove', onMouseEvent);
+            canvasRef.current.addEventListener('wheel', onMouseEvent, { passive: true });
+            canvasRef.current.addEventListener('keydown', onKeyboardEvent);
+            canvasRef.current.addEventListener('keyup', onKeyboardEvent);
+
+            return () => {
+                if (canvasRef.current) {
+                    canvasRef.current.removeEventListener('mousedown', onMouseEvent);
+                    canvasRef.current.removeEventListener('mousemove', onMouseEvent);
+                    canvasRef.current.removeEventListener('wheel', onMouseEvent);
+                    canvasRef.current.removeEventListener('keydown', onKeyboardEvent);
+                    canvasRef.current.removeEventListener('keyup', onKeyboardEvent);
+                }
+
+            };
+        }else {
+            console.log('Canvas not initialized');
+        }
+
+    }, [onMouseEvent]);
+
+    return (
+            // <canvas tabIndex={0} ref={canvasRef}  height={height} width={width} />
+            <canvas
+      tabIndex={0}
+      ref={canvasRef}
+      height={720}
+      width={1280}
+      style={{ width: '1280px', height: '720px' }} // Ensure dimensions are explicitly set
+    />
+    );
+
+};
+
+
+export default Canvas;