whole project function plan

 1. Backend Development:

1. User Registration and Login:
   - Create a user model to store user information.
   - Implement registration page to validate user input and save to the database.
   - Implement login functionality to verify user identity and create user sessions.

2. Product Management:
   - Create a product model to store product information.
   - Implement product categorization and filtering functionality.
   - Implement product favoriting feature, update favorites count, and use MQTT for real-time updates of favorites count on base page.

3. Order Management:
   - Create an order model to store order information.
   - Implement payment functionality, verify user password, generate orders, and complete payment.

4. MQTT Implementation:
   - Configure and deploy MQTT Broker.
   - Use MQTT to implement real-time updates of product favorites count.

 2. Frontend Development:

1. Login and Registration Pages:
   - Design and implement user login and registration pages.
   
2. Product Display Page:
   - Design and implement product display page, including categorization, filtering, and favoriting functionality.
   
3. Product Details Page:
   - Design and implement product details page, including seller showcase, buyer showcase, reviews, etc.
   
4. Order Page:
   - Design and implement order page, including payment and confirmation functionality

3. Database Design:

1. User Table:
   - Store user information.
   
2. Product Table:
   - Store product information.
   
3. Order Table:
   - Store order information.
   
4. Favorites Table:
   - Store information about user's favorite products.

 4. Additional Features:

1. Payment Page:
   - Design and implement payment page, providing payment functionality.
   
2. Confirmation Page:
   - Design and implement order confirmation page, providing order confirmation functionality.

 5. Deployment and Testing:

1. Deploy Application:
   - Deploy the application to a server.
   
2. Test Application:
   - Test the application to ensure all functionalities are working properly.