Create an AuthContext component: The AuthContext component will be responsible for storing the user's authentication state and exposing methods for logging in and out. You can create it like this:

import { createContext, useState } from "react";

export const AuthContext = createContext();

export const AuthProvider = ({ children }) => {
  const [isLoggedIn, setIsLoggedIn] = useState(false);

  const login = () => setIsLoggedIn(true);
  const logout = () => setIsLoggedIn(false);

  return (
    <AuthContext.Provider value={{ isLoggedIn, login, logout }}>
      {children}
    </AuthContext.Provider>
  );
};

Here, we're using the createContext function to create a new context, AuthContext. The AuthProvider component wraps its child components in the AuthContext.Provider component, which provides the authentication state and methods to its children. The isLoggedIn state represents whether the user is currently logged in or not, and the login and logout functions update the state accordingly.

Set up the routes with useRoutes: You can use the useRoutes hook from the @remix-run/react library to define the routes for your application. Here's an example:

import { useRoutes, useRedirect } from "@remix-run/react";
import { AuthProvider } from "./AuthContext";
import { Home, Login, Dashboard } from "./pages";

export default function App() {
  const routes = useRoutes([
    { path: "/", component: Home },
    { path: "/login", component: Login },
    {
      path: "/dashboard",
      component: Dashboard,
      action: async ({ context }) => {
        if (!context.isLoggedIn) {
          return { redirect: "/login" };
        }
      },
    },
  ]);

  return <AuthProvider>{routes}</AuthProvider>;
}

Here, we're defining three routes: the home page, the login page, and the dashboard page. The Dashboard route has an additional action function that checks whether the user is logged in. If the user is not logged in, it redirects them to the login page using the useRedirect hook.

Note that we're also wrapping the routes in the AuthProvider component to make the authentication state and methods available to the route components.

Implement authentication with Redux Toolkit:

Finally, we can use Redux Toolkit to store the user's authentication state globally and update it when the user logs in or out. Here's an example:

import { configureStore, createSlice } from "@reduxjs/toolkit";

const authSlice = createSlice({
  name: "auth",
  initialState: { isLoggedIn: false },
  reducers: {
    login: (state) => {
      state.isLoggedIn = true;
    },
    logout: (state) => {
      state.isLoggedIn = false;
    },
  },
});

export const { login, logout } = authSlice.actions;

export const store = configureStore({
  reducer: { auth: authSlice.reducer },
});

export const selectIsLoggedIn = (state) => state.auth.isLoggedIn;

Here, we're creating a Redux slice called authSlice that defines the authentication state and the login and logout reducers. We're also defining a selectIsLoggedIn selector function that returns the isLoggedIn state from the Redux store.

We're then configuring the Redux store with the authSlice reducer and exporting the store, login, logout, and select

continuation of the implementation:

Use Redux Toolkit in the Login component:

In the Login component, we can use Redux Toolkit to dispatch the login action when the user logs in. Here's an example:

import { useDispatch } from "react-redux";
import { login } from "../store";

export default function Login() {
  const dispatch = useDispatch();

  const handleLogin = () => {
    // perform login logic
    dispatch(login());
  };

  return (
    <div>
      <h1>Login</h1>
      <button onClick={handleLogin}>Login</button>
    </div>
  );
}

Here, we're using the useDispatch hook to get the Redux store's dispatch function, which we can use to dispatch the login action when the user logs in. Note that we're not performing any actual login logic in this example, but you would replace the handleLogin function with your own login logic.

Use Redux Toolkit in the Dashboard component:

In the Dashboard component, we can use Redux Toolkit to check whether the user is logged in and dispatch the logout action when the user logs out. Here's an example:

import { useSelector, useDispatch } from "react-redux";
import { selectIsLoggedIn, logout } from "../store";

export default function Dashboard() {
  const isLoggedIn = useSelector(selectIsLoggedIn);
  const dispatch = useDispatch();

  const handleLogout = () => {
    // perform logout logic
    dispatch(logout());
  };

  return (
    <div>
      <h1>Dashboard</h1>
      {isLoggedIn && (
        <button onClick={handleLogout}>Logout</button>
      )}
    </div>
  );
}

Here, we're using the useSelector hook to get the isLoggedIn state from the Redux store, and we're using the useDispatch hook to get the dispatch function. We're also defining a handleLogout function that dispatches the logout action when the user logs out. Note that we're only rendering the logout button if the user is logged in.

That's it! With this implementation, you can use the AuthContext component to manage the user's authentication state and the useRoutes hook to define the routes for your application. You can use Redux Toolkit to store the user's authentication state globally and update it when the user logs in or out.

Putting it all together:

Now that we have implemented the AuthContext, useRoutes hook, and Redux Toolkit, we can put them all together in our main app component. Here's an example:

import { BrowserRouter as Router, Route, Switch } from "react-router-dom";
import { AuthContextProvider, useRoutes } from "./auth";
import { configureStore } from "@reduxjs/toolkit";
import { Provider } from "react-redux";
import { login, logout, selectIsLoggedIn } from "./store";
import Login from "./components/Login";
import Dashboard from "./components/Dashboard";

const store = configureStore({
  reducer: {
    auth: authReducer,
  },
});

function App() {
  const isLoggedIn = useSelector(selectIsLoggedIn);
  const routes = useRoutes(isLoggedIn);

  useEffect(() => {
    // check if the user is already logged in
    const storedUser = localStorage.getItem("user");
    if (storedUser) {
      store.dispatch(login());
    }
  }, []);

  return (
    <Provider store={store}>
      <AuthContextProvider>
        <Router>
          <Switch>
            <Route path="/login">
              <Login />
            </Route>
            <Route path="/">
              {routes}
              <Dashboard />
            </Route>
          </Switch>
        </Router>
      </AuthContextProvider>
    </Provider>
  );
}

export default App;

In this example, we're defining the App component, which is the main component of our application. We're using the BrowserRouter, Route, and Switch components from the react-router-dom library to define the routes for our application. We're also using the AuthContextProvider component to manage the user's authentication state, and the Provider component from Redux to provide the Redux store to our components.

Inside the App component, we're using the useSelector hook to get the isLoggedIn state from the Redux store. We're also using the useRoutes hook to define the routes for our application based on whether the user is logged in or not. We're rendering the Login component if the user visits the /login route, and we're rendering the Dashboard component if the user visits any other route.

We're also using the useEffect hook to check if the user is already logged in when the app first loads. If the user is already logged in (i.e., their authentication state is stored in localStorage), we're dispatching the login action to update the authentication state in the Redux store.

Finally, we're wrapping our app component in the Provider component from Redux and the AuthContextProvider component from the auth module. This ensures that our components have access to the Redux store and the AuthContext component.

And that's it! With this implementation, you have a complete authentication flow using the useRoutes hook, AuthContext, and Redux Toolkit.