From 189f9fb02e59912ac1d42175ba7b3ced703d8216 Mon Sep 17 00:00:00 2001
From: AkhilS2 <55607137+AkhilS2@users.noreply.github.com>
Date: Sat, 11 May 2024 16:26:44 -0700
Subject: [PATCH] frontend update backend token verification

---
 .gitignore             |  1 +
 app/loginPage/page.tsx | 64 ++++++++++++++++++++++++++++++++++--------
 backend/myapi/urls.py  |  1 +
 backend/myapi/views.py | 54 +++++++++++++++++++++++++++++++++++
 4 files changed, 109 insertions(+), 11 deletions(-)

diff --git a/.gitignore b/.gitignore
index 2879fed..6ec9ded 100644
--- a/.gitignore
+++ b/.gitignore
@@ -26,6 +26,7 @@ yarn-debug.log*
 yarn-error.log*
 
 # local env files
+.env
 .env*.local
 
 # vercel
diff --git a/app/loginPage/page.tsx b/app/loginPage/page.tsx
index 1041c06..20da42f 100644
--- a/app/loginPage/page.tsx
+++ b/app/loginPage/page.tsx
@@ -4,6 +4,7 @@ import { GoogleOAuthProvider, useGoogleLogin, googleLogout, TokenResponse} from
 import { jwtDecode } from "jwt-decode";
 import axios from "axios";
 
+const GOOGLE_CLIENT_ID = process.env.NEXT_PUBLIC_GOOGLE_CLIENT_ID;
 
 interface User {
   name: string;
@@ -12,7 +13,7 @@ interface User {
 }
 const LoginPage = () => {
   return(
-    <GoogleOAuthProvider clientId={'1040494859138-vji3ddfil5jancg23ifaginvmn71hktf.apps.googleusercontent.com'}>
+    <GoogleOAuthProvider clientId={GOOGLE_CLIENT_ID}>
       <LoginComponent/>
     </GoogleOAuthProvider>
   )
@@ -21,14 +22,15 @@ const LoginPage = () => {
 const LoginComponent = () => {
   const [user, setUser] = useState<User | null>(null);
   
+  
 
 
   useEffect(() => {
     console.log("LoginPage component mounted");
   }, []);
 
-  const handleLoginSuccess = (tokenResponse: any) => {
-    if ('code' in tokenResponse) {
+  /*const handleLoginSuccess = async (tokenResponse: any) => {
+   if ('code' in tokenResponse) {
       // Handle authorization code flow
       console.log('Authorization Code:', tokenResponse.code);
       // Exchange code for tokens here
@@ -41,19 +43,56 @@ const LoginComponent = () => {
         email: decoded.email,
         picture: decoded.picture
       });
-      // Send token to backend if necessary
+
+     console.log(tokenResponse);
       axios.post('http://localhost:8000/myapi/users/google-oauth2/', { token: tokenResponse.access_token })
         .then(res => console.log('Backend login successful', res))
         .catch(err => console.error('Backend login failed', err));
-    }
+    }*/
+    /*console.log(tokenResponse);
+    const decoded: User = jwtDecode(tokenResponse.id_token);
 
-  };
+    setUser({
+      name: decoded.name,
+      email: decoded.email,
+      picture: decoded.picture
+    })*/
+          // fetching userinfo can be done on the client or the server
+    
+
+  
+  
   const login = useGoogleLogin({
-    flow: "auth-code",
+    flow: "implicit",
+    
+    onSuccess: async tokenResponse => {
+      console.log(tokenResponse);
+      //handleLoginSuccess
+      //client side authentication retrieve user info from access token
+      const userInfo = await axios
+      .get('https://www.googleapis.com/oauth2/v3/userinfo', {
+        headers: { Authorization: `Bearer ${tokenResponse.}` },
+      })
+      
+      .then(res => res.data);
+      //frontend user info
+      setUser({
+        name: userInfo.name,
+        email: userInfo.email,
+        picture: userInfo.picture
+      })
+      //send the token to backend
+      axios.post('http://localhost:8000/myapi/users/', {tokenResponse: tokenResponse})
+      .then(res => console.log('Backend login successful', res))
+      .catch(err => console.error('Backend login failed', err))
+  
+      
     
-    onSuccess: (tokenResponse) => handleLoginSuccess,
+      
+    },
     onError: (errorResponse) => console.error('Login Failed', errorResponse),
   });
+
   const handleLogout = () => {
     googleLogout();
     setUser(null);  // Clears the user state, effectively logging out the user
@@ -66,9 +105,11 @@ const LoginComponent = () => {
       </button>
       {user && (
         <div>
-          <img src={user.picture} alt="User profile" />
-          <h2>Welcome, {user.name} - {user.email}</h2>
-          
+            <div className="center">
+              <img src={user.picture} alt="User profile" />
+            </div>
+          <h2 className="m-5 p-2 text-[#003C6C] font-medium text-xl">Welcome, {user.name}</h2>
+          <h3 className="m-5 p-2 text-[#003C6C] font-medium text-xl">Email: {user.email}</h3>
         </div>
       )}
       <button onClick={handleLogout} className="hover:underline decoration-yellow-400 underline-offset-8 top-0 right-0 m-5 p-2 text-[#003C6C] font-medium text-xl">
@@ -76,6 +117,7 @@ const LoginComponent = () => {
       </button>
     </div>
     
+
   );
 };
 
diff --git a/backend/myapi/urls.py b/backend/myapi/urls.py
index 0e34851..ff61ec0 100644
--- a/backend/myapi/urls.py
+++ b/backend/myapi/urls.py
@@ -4,4 +4,5 @@
 urlpatterns = [
     path("hello-world/", views.hello_world, name="hello_world"),
     path("locations/", views.get_locations, name="locations"),
+    path("users/", views.validate_user, name="users")
 ]
diff --git a/backend/myapi/views.py b/backend/myapi/views.py
index 9575c9a..0022f46 100644
--- a/backend/myapi/views.py
+++ b/backend/myapi/views.py
@@ -1,6 +1,16 @@
 from django.conf.locale import fr
 from rest_framework.response import Response
 from rest_framework.decorators import api_view
+from django.conf import settings
+from django.http import JsonResponse
+from rest_framework.decorators import api_view
+from rest_framework.exceptions import ValidationError
+import requests
+
+
+
+GOOGLE_ID_TOKEN_INFO_URL = 'https://www.googleapis.com/oauth2/v3/tokeninfo'
+GOOGLE_USER_INFO_URL = 'https://www.googleapis.com/oauth2/v3/userinfo'
 
 from .db_functions.locations import (
     get_all_locations_from_db,
@@ -59,3 +69,47 @@ def get_locations(request):
     json_data = {"locations": locations}
 
     return Response(json_data)
+
+@api_view(["POST"])
+def validate_user(request):
+    token_response = request.data.get('tokenResponse')
+    access_token = token_response.get('access_token')
+    id_token = token_response.get('code')
+    print(id_token)
+    try:
+        response = requests.get(
+            GOOGLE_ID_TOKEN_INFO_URL,
+            params={'id_token': id_token}
+        )
+    except:
+        return JsonResponse({'error': 'Failed to validate id token token'}, status=500)
+
+
+    
+    #using access token we can get the user information
+
+    try:
+        response = requests.get(
+            GOOGLE_USER_INFO_URL,
+            headers={'Authorization': f'Bearer {access_token}'}
+        )
+        response.raise_for_status()
+        user_info = response.json()
+        print(user_info["email"])
+        #add user_info to database using get or create possibly
+        #print(user_info)
+        
+
+    except requests.RequestException as e:
+        return JsonResponse({'error': 'Failed to validate access token'}, status=500)
+    
+    return JsonResponse({'message': 'User is validated', 'user_info': user_info})
+
+
+
+    
+
+
+
+
+