feat: initial scaffolding, client can connect with a user name

client/src/App.tsx

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+import { BrowserRouter, Routes, Route } from "react-router-dom";
+import Home from "./pages/Home";
+import Room from "./pages/Room";
+
+function App() {
+  return (
+    <BrowserRouter>
+      <Routes>
+        <Route path="/" element={<Home />} />
+        <Route path="/room/:roomId" element={<Room />} />
+      </Routes>
+    </BrowserRouter>
+  );
+}
+
+export default App;

client/src/assets/react.svg

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client/src/components/Connect.tsx

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+import React, { useState } from "react";
+
+interface ConnectProps {
+  onConnect: (name: string) => void;
+}
+
+function Connect({ onConnect }: ConnectProps) {
+  const [name, setName] = useState("");
+
+  function handleConnect() {
+    if (!name) {
+      return;
+    }
+
+    onConnect(name);
+  }
+
+  function handleKeyPress(e: React.KeyboardEvent<HTMLInputElement>) {
+    if (e.key === "Enter" && name) {
+      handleConnect();
+    }
+  }
+
+  return (
+    <div className="flex gap-4 mt-4">
+      <input
+        type="text"
+        placeholder="Enter your name"
+        value={name}
+        onChange={(e) => setName(e.target.value)}
+        onKeyDown={handleKeyPress}
+        className="w-full px-3 py-2 border border-gray-300 rounded-md shadow-sm placeholder-gray-400 focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-blue-500"
+      />
+      <button
+        onClick={handleConnect}
+        disabled={!name}
+        className="w-full py-2 px-4 bg-blue-600 text-white rounded-md hover:bg-blue-700 transition-colors duration-200 focus:outline-none focus:ring-2 focus:ring-blue-500 focus:ring-offset-2"
+      >
+        Connect
+      </button>
+    </div>
+  );
+}
+
+export default React.memo(Connect);

client/src/components/Layout.tsx

@@ -0,0 +1,18 @@
+interface LayoutProps {
+  children: React.ReactNode;
+}
+
+function Layout({ children }: LayoutProps) {
+  return (
+    <>
+      <main className="min-h-screen p-4">
+        <header className="top-0 w-full bg-white py-4">
+          <h1 className="text-3xl text-center">Simple Chat</h1>
+        </header>
+        <div className="max-w-2xl md:p-8 m-auto">{children}</div>
+      </main>
+    </>
+  );
+}
+
+export default Layout;

client/src/hooks/useWebSocket.ts

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+import { useCallback, useEffect, useState } from "react";
+import { ClientJoinMessage, ClientMessage } from "../../../shared";
+
+export function useWebSocket(roomId: string) {
+  const [ws, setWs] = useState<WebSocket | null>(null);
+  const [isConnected, setIsConnected] = useState(false);
+
+  // Send a message to the server, useCallback to avoid unnecessary re-renders for components using this hook
+  const sendMessage = useCallback(
+    (message: ClientMessage) => {
+      if (ws?.readyState === WebSocket.OPEN) {
+        ws.send(JSON.stringify(message));
+      } else {
+        console.error("WebSocket connection not established");
+      }
+    },
+    [ws],
+  );
+
+  const connect = useCallback(
+    (name: string) => {
+      try {
+        const websocket = new WebSocket(`/ws/room/${roomId}`);
+        console.log("Connecting to WebSocket server...");
+
+        websocket.onopen = () => {
+          console.log("WebSocket connection established to room:", roomId);
+          setIsConnected(true);
+          const message: ClientJoinMessage = {
+            type: "JOIN",
+            payload: {
+              username: name,
+            },
+          };
+          websocket.send(JSON.stringify(message));
+        };
+
+        websocket.onclose = () => {
+          console.log("WebSocket connection closed to room:", roomId);
+          setIsConnected(false);
+          setWs(null);
+        };
+
+        websocket.onerror = (error) => {
+          console.error("WebSocket error:", error);
+          setIsConnected(false);
+        };
+
+        setWs(websocket);
+      } catch (error) {
+        console.error("Failed to create WebSocket connection:", error);
+        setIsConnected(false);
+      }
+    },
+    [roomId],
+  );
+
+  useEffect(() => {
+    return () => {
+      if (ws) {
+        ws.close();
+      }
+    };
+  }, [ws]);
+
+  return { ws, isConnected, connect, sendMessage };
+}

client/src/index.css

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+@import "tailwindcss";

client/src/main.tsx

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+import { StrictMode } from "react";
+import { createRoot } from "react-dom/client";
+import App from "./App.tsx";
+import "./index.css";
+
+createRoot(document.getElementById("root")!).render(
+  <StrictMode>
+    <App />
+  </StrictMode>,
+);

client/src/pages/Home.tsx

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+import { useState } from "react";
+import { useNavigate } from "react-router-dom";
+import Layout from "../components/Layout";
+
+function Home() {
+  const [roomId, setRoomId] = useState("");
+  const navigate = useNavigate();
+
+  function onClickCreateRoom() {
+    const roomId = Math.random().toString(36).substring(7);
+    navigate(`/room/${roomId}`);
+  }
+
+  function onClickJoinRoom() {
+    if (!roomId) {
+      return;
+    }
+    navigate(`/room/${roomId}`);
+  }
+
+  return (
+    <Layout>
+      <section className="max-w-md mx-auto">
+        <div className="space-y-4">
+          <h2 className="text-2xl font-semibold text-gray-800">
+            Create a new Room
+          </h2>
+          <button
+            type="button"
+            onClick={onClickCreateRoom}
+            className="w-full py-2 px-4 bg-blue-600 text-white rounded-md hover:bg-blue-700 transition-colors duration-200 focus:outline-none focus:ring-2 focus:ring-blue-500 focus:ring-offset-2"
+          >
+            Create
+          </button>
+        </div>
+
+        <div className="space-y-4 mt-16">
+          <h2 className="text-2xl font-semibold text-gray-800">
+            Join Existing Room
+          </h2>
+          <label
+            htmlFor="roomId"
+            className="block text-sm font-medium text-gray-700"
+          >
+            Room ID:
+          </label>
+          <input
+            id="roomId"
+            type="text"
+            placeholder="Room ID"
+            value={roomId}
+            onChange={(e) => setRoomId(e.target.value)}
+            className="w-full px-3 py-2 border border-gray-300 rounded-md shadow-sm placeholder-gray-400 focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-blue-500"
+          />
+          <button
+            type="button"
+            onClick={onClickJoinRoom}
+            disabled={!roomId}
+            className="w-full py-2 px-4 bg-green-600 text-white rounded-md hover:bg-green-700 transition-colors duration-200 focus:outline-none focus:ring-2 focus:ring-green-500 focus:ring-offset-2 disabled:opacity-50 disabled:cursor-not-allowed"
+          >
+            Join
+          </button>
+        </div>
+      </section>
+    </Layout>
+  );
+}
+
+export default Home;

client/src/pages/Room.tsx

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+import { useParams } from "react-router-dom";
+import Layout from "../components/Layout";
+import Connect from "../components/Connect";
+import { useWebSocket } from "../hooks/useWebSocket";
+
+function Room() {
+  const { roomId } = useParams();
+  const { isConnected, connect } = useWebSocket(roomId ?? "");
+
+  return (
+    <Layout>
+      <section className="w-full">
+        <h2 className="text-xl bg-gray-100 p-4 flex justify-between items-center rounded-md shadow-sm">
+          <span className="font-medium">Room ID: {roomId}</span>
+          <span
+            className={`px-3 py-1 rounded-full text-sm font-medium ${
+              isConnected
+                ? "bg-green-100 text-green-800"
+                : "bg-red-100 text-red-800"
+            }`}
+          >
+            {isConnected ? "Connected" : "Not Connected"}
+          </span>
+        </h2>
+
+        {!isConnected && <Connect onConnect={connect} />}
+      </section>
+    </Layout>
+  );
+}
+
+export default Room;

client/src/vite-env.d.ts

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+/// <reference types="vite/client" />