Add Google sign-in functionality to Login and Register pages, including error handling and UI updates for better user experience.

app/auth/callback/route.ts

@@ -0,0 +1,17 @@
+import { createRouteHandlerClient } from '@supabase/auth-helpers-nextjs';
+import { cookies } from 'next/headers';
+import { NextRequest, NextResponse } from 'next/server';
+
+export async function GET(request: NextRequest) {
+  const requestUrl = new URL(request.url);
+  const code = requestUrl.searchParams.get('code');
+  
+  if (code) {
+    const cookieStore = cookies();
+    const supabase = createRouteHandlerClient({ cookies: () => cookieStore });
+    await supabase.auth.exchangeCodeForSession(code);
+  }
+
+  // URL to redirect to after sign in process completes
+  return NextResponse.redirect(new URL('/analytics', request.url));
+} 

app/login/page.tsx

@@ -21,7 +21,7 @@ function MessageHandler({ setMessage }: { setMessage: (message: { type: string,
 
 export default function LoginPage() {
   const router = useRouter();
-  const { signIn, user } = useAuth();
+  const { signIn, signInWithGoogle, user } = useAuth();
   
   const [email, setEmail] = useState('');
   const [password, setPassword] = useState('');
@@ -67,6 +67,28 @@ export default function LoginPage() {
     }
   };
   
+  const handleGoogleSignIn = async () => {
+    try {
+      setIsLoading(true);
+      setMessage({ type: '', content: '' });
+      
+      const { error } = await signInWithGoogle();
+      
+      if (error) {
+        throw new Error(error.message);
+      }
+      
+      // Google OAuth will handle the redirect
+    } catch (error) {
+      console.error('Google login error:', error);
+      setMessage({ 
+        type: 'error', 
+        content: error instanceof Error ? error.message : 'Failed to sign in with Google' 
+      });
+      setIsLoading(false);
+    }
+  };
+  
   return (
     <div className="flex items-center justify-center min-h-screen bg-gray-100">
       {/* Wrap the component using useSearchParams in Suspense */}
@@ -101,7 +123,31 @@ export default function LoginPage() {
           </div>
         )}
         
-        <form onSubmit={handleEmailSignIn} className="mt-8 space-y-6">
+        {/* Google Sign In Button */}
+        <button
+          type="button"
+          onClick={handleGoogleSignIn}
+          disabled={isLoading}
+          className="w-full flex items-center justify-center py-2 px-4 border border-gray-300 rounded-md shadow-sm text-sm font-medium text-gray-700 bg-white hover:bg-gray-50 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500"
+        >
+          <svg className="h-5 w-5 mr-2" viewBox="0 0 24 24" width="24" height="24">
+            <g transform="matrix(1, 0, 0, 1, 27.009001, -39.238998)">
+              <path fill="#4285F4" d="M -3.264 51.509 C -3.264 50.719 -3.334 49.969 -3.454 49.239 L -14.754 49.239 L -14.754 53.749 L -8.284 53.749 C -8.574 55.229 -9.424 56.479 -10.684 57.329 L -10.684 60.329 L -6.824 60.329 C -4.564 58.239 -3.264 55.159 -3.264 51.509 Z"/>
+              <path fill="#34A853" d="M -14.754 63.239 C -11.514 63.239 -8.804 62.159 -6.824 60.329 L -10.684 57.329 C -11.764 58.049 -13.134 58.489 -14.754 58.489 C -17.884 58.489 -20.534 56.379 -21.484 53.529 L -25.464 53.529 L -25.464 56.619 C -23.494 60.539 -19.444 63.239 -14.754 63.239 Z"/>
+              <path fill="#FBBC05" d="M -21.484 53.529 C -21.734 52.809 -21.864 52.039 -21.864 51.239 C -21.864 50.439 -21.724 49.669 -21.484 48.949 L -21.484 45.859 L -25.464 45.859 C -26.284 47.479 -26.754 49.299 -26.754 51.239 C -26.754 53.179 -26.284 54.999 -25.464 56.619 L -21.484 53.529 Z"/>
+              <path fill="#EA4335" d="M -14.754 43.989 C -12.984 43.989 -11.404 44.599 -10.154 45.789 L -6.734 42.369 C -8.804 40.429 -11.514 39.239 -14.754 39.239 C -19.444 39.239 -23.494 41.939 -25.464 45.859 L -21.484 48.949 C -20.534 46.099 -17.884 43.989 -14.754 43.989 Z"/>
+            </g>
+          </svg>
+          {isLoading ? 'Signing in...' : 'Sign in with Google'}
+        </button>
+        
+        <div className="mt-6 flex items-center justify-center">
+          <div className="border-t border-gray-300 flex-grow mr-3"></div>
+          <span className="text-sm text-gray-500">or</span>
+          <div className="border-t border-gray-300 flex-grow ml-3"></div>
+        </div>
+        
+        <form onSubmit={handleEmailSignIn} className="mt-6 space-y-6">
           <div>
             <label htmlFor="email" className="block text-sm font-medium text-gray-700">
               Email address
@@ -144,7 +190,7 @@ export default function LoginPage() {
               disabled={isLoading}
               className="w-full flex justify-center py-2 px-4 border border-transparent rounded-md shadow-sm text-sm font-medium text-white bg-blue-600 hover:bg-blue-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500"
             >
-              {isLoading ? 'Signing in...' : 'Sign in'}
+              {isLoading ? 'Signing in...' : 'Sign in with Email'}
             </button>
           </div>
         </form>

app/register/page.tsx

@@ -12,44 +12,44 @@ export default function RegisterPage() {
   const [isLoading, setIsLoading] = useState(false);
   const { signUp, signInWithGoogle } = useAuth();
 
-  // 处理注册表单提交
+  // Handle registration form submission
   const handleSubmit = async (e: FormEvent) => {
     e.preventDefault();
     setError(null);
     
-    // 验证密码
+    // Validate passwords
     if (password !== confirmPassword) {
-      setError('两次输入的密码不一致');
+      setError('Passwords do not match');
       return;
     }
     
-    // 密码强度验证
+    // Password strength validation
     if (password.length < 6) {
-      setError('密码长度至少为6个字符');
+      setError('Password must be at least 6 characters');
       return;
     }
     
     setIsLoading(true);
     try {
       await signUp(email, password);
-      // 注册成功后会跳转到登录页面，提示用户验证邮箱
+      // After successful registration, redirect to login page with email verification prompt
     } catch (error) {
       console.error('Registration error:', error);
-      setError('注册失败，请稍后再试或使用其他邮箱');
+      setError('Registration failed. Please try again later or use a different email');
     } finally {
       setIsLoading(false);
     }
   };
 
-  // 处理Google注册/登录
+  // Handle Google registration/login
   const handleGoogleSignIn = async () => {
     setError(null);
     try {
       await signInWithGoogle();
-      // 登录流程会重定向到Google，然后回到应用
+      // Login flow will redirect to Google and then back to the application
     } catch (error) {
       console.error('Google sign in error:', error);
-      setError('Google登录失败，请稍后再试');
+      setError('Google login failed. Please try again later');
     }
   };
 
@@ -57,13 +57,13 @@ export default function RegisterPage() {
     <div className="flex items-center justify-center min-h-screen bg-gray-100 dark:bg-gray-900">
       <div className="w-full max-w-md p-8 space-y-8 bg-white dark:bg-gray-800 rounded-lg shadow-md">
         <div className="text-center">
-          <h1 className="text-2xl font-bold text-gray-900 dark:text-gray-100">注册</h1>
+          <h1 className="text-2xl font-bold text-gray-900 dark:text-gray-100">Register</h1>
           <p className="mt-2 text-sm text-gray-600 dark:text-gray-400">
-            创建您的帐户以访问分析仪表板
+            Create your account to access the analytics dashboard
           </p>
         </div>
 
-        {/* 错误提示 */}
+        {/* Error message */}
         {error && (
           <div className="p-4 mb-4 text-sm text-red-700 bg-red-100 dark:bg-red-900 dark:text-red-200 rounded-lg">
             {error}
@@ -74,7 +74,7 @@ export default function RegisterPage() {
           <div className="space-y-4">
             <div>
               <label htmlFor="email" className="block text-sm font-medium text-gray-700 dark:text-gray-300">
-                邮箱地址
+                Email Address
               </label>
               <input
                 id="email"
@@ -90,7 +90,7 @@ export default function RegisterPage() {
             </div>
             <div>
               <label htmlFor="password" className="block text-sm font-medium text-gray-700 dark:text-gray-300">
-                密码
+                Password
               </label>
               <input
                 id="password"
@@ -106,7 +106,7 @@ export default function RegisterPage() {
             </div>
             <div>
               <label htmlFor="confirmPassword" className="block text-sm font-medium text-gray-700 dark:text-gray-300">
-                确认密码
+                Confirm Password
               </label>
               <input
                 id="confirmPassword"
@@ -128,7 +128,7 @@ export default function RegisterPage() {
               disabled={isLoading}
               className="w-full flex justify-center py-2 px-4 border border-transparent rounded-md shadow-sm text-sm font-medium text-white bg-blue-600 hover:bg-blue-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500 disabled:opacity-50 disabled:cursor-not-allowed"
             >
-              {isLoading ? '注册中...' : '注册'}
+              {isLoading ? 'Registering...' : 'Register'}
             </button>
           </div>
 
@@ -137,7 +137,7 @@ export default function RegisterPage() {
               <div className="w-full border-t border-gray-300 dark:border-gray-600"></div>
             </div>
             <div className="relative flex justify-center text-sm">
-              <span className="px-2 bg-white dark:bg-gray-800 text-gray-500 dark:text-gray-400">或</span>
+              <span className="px-2 bg-white dark:bg-gray-800 text-gray-500 dark:text-gray-400">or</span>
             </div>
           </div>
 
@@ -173,19 +173,19 @@ export default function RegisterPage() {
                   />
                 </g>
               </svg>
-              使用Google账号注册
+              Sign up with Google
             </button>
           </div>
         </form>
 
         <div className="mt-6 text-center">
           <p className="text-sm text-gray-600 dark:text-gray-400">
-            已有账号？{' '}
+            Already have an account?{' '}
             <Link
               href="/login"
               className="font-medium text-blue-600 hover:text-blue-500 dark:text-blue-400 dark:hover:text-blue-300"
             >
-              登录
+              Log in
             </Link>
           </p>
         </div>