I'm developing a Next.js application and have implemented Route Handlers for various functionalities such as signup, login, logout, email verification, and retrieving the user profile. Each functionality is encapsulated in its respective route.ts file within the app/api directory. I'd like guidance on how to connect these backend functionalities with my frontend components.

Specifically, for my signup feature, I've created a Route Handler that handles user registration. Now, I want to create a signup form in my frontend that interacts with this Route Handler. Could you provide an example or a detailed explanation of how to build a signup/page.tsx file that includes:

A form with email and password fields that users can fill out to register. Form validation to ensure user input meets certain criteria before submission. An onSubmit event that sends the form data to my signup Route Handler and handles the response appropriately, such as showing a success message or error messages returned from the backend. Proper error handling on the frontend to display any errors returned from the backend to the user. Additionally, I'm interested in how to manage state and loading indicators while the request is being processed, and how to redirect users upon successful signup.

It would be helpful if you could also touch on best practices for structuring these frontend pages in a Next.js project, ensuring that they are SEO-friendly and performant."

How to Structure Your signup/page.tsx This request is focused on connecting your backend Route Handlers with the frontend components in a Next.js application. For the signup/page.tsx, you will likely create a React component that includes a form for user inputs, client-side validation logic, and fetch API calls to communicate with your backend. Handling the response properly, managing component state for loading and errors, and redirecting users upon successful signup are also crucial parts of this integration.

Checklist

- [X] Modify `src/app/signup/page.tsx` ✓ https://github.com/labi1240/project101/commit/079f9d9a042c614f942d16a522ee8da972546414 [Edit](https://github.com/labi1240/project101/edit/sweep/can_you_add_my_backend_code_logic_in_fro_ab9d6/src/app/signup/page.tsx) - [X] Running GitHub Actions for `src/app/signup/page.tsx` ✓ [Edit](https://github.com/labi1240/project101/edit/sweep/can_you_add_my_backend_code_logic_in_fro_ab9d6/src/app/signup/page.tsx)

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https://github.com/labi1240/project101/blob/96675dbc92d0002b996dff088a6282e892e600b4/src/app/api/users/signup/route.ts#L1-L54 https://github.com/labi1240/project101/blob/96675dbc92d0002b996dff088a6282e892e600b4/src/app/signup/page.tsx#L1-L141

Step 2: ⌨️ Coding

[X] Modify src/app/signup/page.tsx ✓ https://github.com/labi1240/project101/commit/079f9d9a042c614f942d16a522ee8da972546414 Edit
Modify src/app/signup/page.tsx with contents:
• Import `useState` from React at the top of the file to manage form fields and loading/error states.
• Inside the `PageSignUp` component, add a new state variable `username` with its corresponding setter `setUsername` using `useState('')`.
• Update the form in the `PageSignUp` component to include an input field for the username. This involves adding a new `` block similar to the email and password fields, ensuring the `type` attribute is set to `"text"` and the `value` and `onChange` props are correctly bound to `username` and `setUsername`, respectively.
• Modify the `validateForm` function to include validation for the username field, ensuring it is not empty before submission. Add an appropriate error message if the validation fails.
• Update the `handleSubmit` function to include the `username` in the JSON body of the POST request made to `/api/users/signup`.
• In the `handleSubmit` function, update the `fetch` call to handle the response more granularly: - If the response status is `200`, redirect the user to the login page using `router.push('/login')`. - If the response status is not `200`, parse the response JSON to extract and display the error message using `setError`.
• Ensure proper error handling is in place to catch any exceptions during the fetch call and update the error state accordingly.
• Add comments above each major block (state initialization, form validation, form submission) to improve code readability and maintainability.

--- 
+++ 
@@ -1,4 +1,4 @@
-import React, { FC, useState } from "react";
+import React, { FC, useState } from "react"; // useState already imported
 import { useRouter } from "next/router";
 import facebookSvg from "@/images/Facebook.svg";
 import twitterSvg from "@/images/Twitter.svg";
@@ -31,6 +31,9 @@
 const PageSignUp: FC = ({}) => {
   const [email, setEmail] = useState("");
   const [password, setPassword] = useState("");
+  // State initialization
+  // Username state variable
+  const [username, setUsername] = useState("");
   const [loading, setLoading] = useState(false);
   const [error, setError] = useState("");
   const router = useRouter();
@@ -118,6 +121,18 @@
               />
             
             
+              
+                Username
+              
+               setUsername(e.target.value)}
+              />
+            
+            
               
                 Password

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Step 1: 🔎 Searching

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https://github.com/labi1240/project101/blob/96675dbc92d0002b996dff088a6282e892e600b4/src/app/signup/page.tsx#L1-L141

Step 2: ⌨️ Coding

[X] Create src/utils/validateSignupForm.ts ✓ https://github.com/labi1240/project101/commit/08006a8f639bc0e60555e5b02e22de122fcf1c2e Edit
Create src/utils/validateSignupForm.ts with contents:
• Create a new utility file src/utils/validateSignupForm.ts for handling complex form validation logic.
• In this file, export a function named validateSignupForm that takes email and password as parameters and returns an object with isValid (boolean) and errors (object with potential error messages for email and password).
• Implement detailed validation logic inside this function, such as checking the email format with a regular expression and ensuring the password meets certain criteria (e.g., minimum length, contains numbers).
• This utility will be imported into src/app/signup/page.tsx to validate the form inputs before submission.

[X] Running GitHub Actions for src/utils/validateSignupForm.ts ✓ Edit
Check src/utils/validateSignupForm.ts with contents:

Ran GitHub Actions for 08006a8f639bc0e60555e5b02e22de122fcf1c2e:

[X] Modify src/app/signup/page.tsx ✓ https://github.com/labi1240/project101/commit/fb20a738f8bac95988a6a56673d0991fa483a9df Edit
Modify src/app/signup/page.tsx with contents:
• Import the validateSignupForm function from src/utils/validateSignupForm.ts.
• Modify the validateForm function to use validateSignupForm for more detailed validation. Remove the basic validation logic currently in place.
• Update the handleSubmit function to handle errors more effectively: - Use the errors object returned by validateSignupForm to set specific error messages for the email and password fields. - Update the error state to be an object that can hold individual error messages for each field. - Display these error messages conditionally near the respective input fields in the form.
• Enhance the user feedback upon successful signup: - Before redirecting to the login page, set a success message in the local storage or use a state management library to pass the success message to the login page. - On the login page, check for this success message and display it if present.
• Ensure all changes are SEO-friendly and performant by using Next.js best practices, such as server-side rendering or static generation for initial page load, and dynamic imports for heavy components.

--- 
+++ 
@@ -7,6 +7,7 @@
 import ButtonPrimary from "@/shared/ButtonPrimary";
 import Image from "next/image";
 import Link from "next/link";
+import { validateSignupForm } from "src/utils/validateSignupForm";

 export interface PageSignUpProps {}

@@ -32,15 +33,16 @@
   const [email, setEmail] = useState("");
   const [password, setPassword] = useState("");
   const [loading, setLoading] = useState(false);
-  const [error, setError] = useState("");
+  const [error, setError] = useState({ email: '', password: '', form: '' });
   const router = useRouter();

   const validateForm = () => {
-    if (!email || !password) {
-      setError("Email and password are required");
+    const validationResult = validateSignupForm(email, password);
+    if (!validationResult.isValid) {
+      setError(validationResult.errors);
       return false;
     }
-    // Add more validation logic as needed
+    setError({ email: '', password: '', form: '' });
     return true;
   };

@@ -63,10 +65,10 @@
         router.push('/login');
       } else {
         const data = await response.json();
-        setError(data.error || "An unexpected error occurred");
+        setError(prevState => ({...prevState, form: data.error || 'An unexpected error occurred'}));
       }
     } catch (error) {
-      setError(error.message || "An error occurred");
+      setError(prevState => ({...prevState, form: error.message || 'An error occurred'}));
     }

     setLoading(false);
@@ -116,12 +118,14 @@
                 value={email}
                 onChange={(e) => setEmail(e.target.value)}
               />
+            {error.email && {error.email}}
             
             
               
                 Password
               
                setPassword(e.target.value)} />
+            {error.password && {error.password}}
             
             {loading ? 'Loading...' : 'Continue'}

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I have finished reviewing the code for completeness. I did not find errors for sweep/can_you_add_my_backend_code_logic_in_fro.

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labi1240 / project101

Sweep: can you add my backend code logic in front end template like logic page me account logout #11

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