Authenticating Users In Firebase and managing Auth state using react-query-firebase
Tags: firebase, react, reactquery, authentication
Published: 2022-05-20 13:38:43

this is part 2 to the set up process [here](https://dev.to/tigawanna/another-react-firebase-tutorial-34d0)

This tutorial's course files on the initial commit + adding auth [course files](https://github.com/tigawanna/project-mangaer)

First step is to set up react-router-dom routes,


```
import React from 'react';
import './App.css';
import { Routes, Route } from "react-router-dom";
import { BrowserRouter } from 'react-router-dom';
import { Toolbar } from './components/Toolbar/Toolbar';
import { Project } from './components/Projects/Project';
import { Home } from './components/Home/Home';

function App() {
  return (
    <div className="h-screen w-screen overflow-x-hidden ">
      <BrowserRouter>
      <div className="fixed top-[0px] right-1 w-full z-30">
      <Toolbar />
      </div>
      <div className="w-full h-full mt-16 ">
        <Routes>
          <Route path="/" element={<Home />} />
          <Route path="/project" element={<Project />} />
         </Routes>
      </div>
      </BrowserRouter>
    </div>
  );
}

export default App;
```



adding two routes , home.tsx and projects.tsx . notice toolbar.txt doesn't need a route since it'll be available evey where making iy a good place to place the user profile pic

```

import React from 'react'
import { GrHome } from "react-icons/gr";
import { IconContext } from "react-icons/lib";
import { Link} from "react-router-dom";
import { FaUserCircle } from 'react-icons/fa';
import { useAuthSignOut} from '@react-query-firebase/auth';
import { auth } from '../../firebase/firebaseConfig';
import { User } from 'firebase/auth';
interface ToolbarProps {
user?:User|null
}

export const Toolbar: React.FC<ToolbarProps> = ({user}) => {
const mutation = useAuthSignOut(auth);
const userImg =user?.photoURL;
const image =userImg?userImg:'https://picsum.photos/id/237/100/100'
return (
 <div className='w-full bg-slate-500 h-16'>
<IconContext.Provider value={{ size: "25px", className: "table-edit-icons" }} >
 <div className='flex flex-grow flex-3'>
<div className='m-1 w-full p-3 bg-slate-800'>
     <Link to="/"><GrHome /></Link>
     </div>
     <div className='m-1 w-full p-3 bg-slate-600'>
     <Link to="/project">Project</Link>
     </div>
     <div className='m-1 w-fit p-3 bg-slate-700'>
      {!user?<FaUserCircle />
       :<img  
    //   @ts-ignore 
       src={image} 
       alt={'no'}
       onClick={()=>{mutation.mutate()}}
       className="rounded-[50%] h-full  w-[70px]"
       />}
     </div>

</div>   
</IconContext.Provider>
 </div>
);
}

```

since this app will need to know who is who to display relevant data , we'll need to auth guard the routes to only show when authed else redirect to a login page



```
import { Navigate } from 'react-router-dom';

//@ts-ignore
export const ProtectedRoute = ({ user, children }) => {
    if (!user) {
      return <Navigate to="/login" replace />;
    }
  
    return children;
  };
```



so we'll wrap our routes with the above component



```
import React from "react";
import "./App.css";
import { Routes, Route} from "react-router-dom";
import { BrowserRouter} from "react-router-dom";
import { Toolbar } from "./components/Toolbar/Toolbar";
import { Project } from "./components/Projects/Project";
import { Home } from "./components/Home/Home";
import { useAuthUser } from "@react-query-firebase/auth";
import { auth } from "./firebase/firebaseConfig";
import { Login } from "./components/auth/Login";
import { ProtectedRoute } from "./components/auth/PrivateRoutes";

function App() {
const user= {}
 return (
    <div className="h-screen w-screen overflow-x-hidden ">
      <BrowserRouter>
        <div className="fixed top-[0px] right-1 w-full z-30">
          <Toolbar user={user} />
        </div>
        <div className="w-full h-full mt-16 ">
          <Routes>
            <Route
              path="/"
              element={
                <ProtectedRoute user={user}>
                  <Home />
                </ProtectedRoute>
              }
            />

            <Route
              path="/project"
              element={
                <ProtectedRoute user={user}>
                  <Project />
                </ProtectedRoute>
              }
            />
            {/* @ts-ignore */}
            <Route path="/login" element={<Login user={user} />} />
          </Routes>
        </div>
      </BrowserRouter>
    </div>
  );
}

export default App;
```



we also added a login route .

setting up the authentication part is pretty straight forward itself , in your firebaseConfig.ts file export the auth from getAuth()




```
import { initializeApp } from "firebase/app";
import { getAuth} from "firebase/auth";


const firebaseConfig = {
//your firebase app credentials go here
  };

const app = initializeApp(firebaseConfig);

export const provider = new GoogleAuthProvider();
export const auth = getAuth(app)
```



 and using the react-query-firebase hooks we can query the auth state with ust one line


```
  const query = useAuthUser("user", auth);
  const user = query.data;
  if (query.isFetching) {
return <div className="w-full h-full flex-center ">Loading...</div>;
  }

```

and pass in the user object into any child components that need it in app.tsx 

as for adding user i chose google signinwithRedirect 




```
import { GoogleAuthProvider, signInWithRedirect } from "firebase/auth";
import { auth} from "../../firebase/firebaseConfig";

const provider = new GoogleAuthProvider();
provider.addScope('https://mail.google.com/');
export const loginUser= () => {
signInWithRedirect(auth, provider)
.then((result:any) => {
console.log("sign in successful result  === ",result)
// The signed-in user info.
    const user = result.user;
  }).catch((error) => {
// Handle Errors here.
console.log("sign in error  === ",error)

 });



}
```

in the repo you'll also notice that you can log out on profile pic click

using the hook
`const mutation = useAuthSignOut(auth);`

then calling 
`mutation.mutate();`

on profile pic clicked

and thats it for authentication in te next part we'll begin the functionalty part with firestore

references:
[react-query-firebase auth ](https://react-query-firebase.invertase.dev/database)
[firebase auth using google](https://firebase.google.com/docs/auth/web/google-signin)
[setting up firebase emulator for testing](https://dev.to/tigawanna/firebase-emulator-16l2)