System Notification Management

[Calebgisa72]

Description As a platform user (vendor or buyer), I want to be notified of every significant event or action related to the products on the e-commerce platform in real-time. This includes notifications for actions such as product addition, expiration, purchase, discounting, etc. This feature will ensure that users stay informed and engaged with the platform's activities.

Acceptance Criteria

• Implement an API endpoint for notifications
• Validate user's authentication and authorization
• Send notifications in real-time using Socket.IO
• Display the number of new and unread notifications on the notification icon
• Ensure users can view all available notifications
• Send notifications to the correct user (seller/buyer) based on the action performed

• Implement appropriate error handling and responses

  Developer Notes

• Define the API endpoint and request/response payloads for notifications
• Implement authentication and authorization checks for user access
• Use Socket.IO to send real-time notifications to users
• Update the notification icon to display the count of new and unread notifications
• Develop a user interface to display all available notifications
• Ensure notifications are sent to the appropriate user based on the action (e.g., notify a seller when their product is bought)
• Handle edge cases, such as failed notification delivery or unauthorized access
• Write unit tests to cover different scenarios and edge cases
• Write clear API documentation for the resulting endpoint

Definition of Done

• Notification API endpoint is implemented and functional
• User authentication and authorization are validated
• Real-time notifications are sent using Socket.IO
• Notification icon displays the number of new and unread notifications
• Users can view all available notifications
• Notifications are sent to the correct user (seller/buyer) based on the action performed
• Appropriate error handling and responses are implemented
• Unit tests are written and passing
• API documentation for the resulting endpoint is completed

[faid-terence]

Nice Work @Calebgisa72 Now Also attach the implementation plan !

[Calebgisa72]

The Implementation Plan:

1. Create a New Branch Task: Create a new branch for this feature. The branch will be called "feat-notifications"

2. Creating entities needed to work on this task Task: Creating a Notification database Steps: Creating a notification entity that collects all the information of a user notification. Creating notification item entity which will collect all the notifications in the system.

3. Set Up Notification Infrastructure Task: Set up Socket.IO for real-time notifications. Steps: Install and configure Socket.IO in the backend. Set up a Socket.IO server to handle real-time communication.

4. Notification Service Task: Create a service for managing notifications. Steps: Implement functions to create, store, and get notifications. Ensuring notifications are targeted to the correct users (vendor/buyer).

5. Implement API Endpoint Task: Develop an API endpoint for sending notifications. Steps: Create a POST endpoint /send notification. Validate user's authentication and authorization. Use the notification service to send notifications. Implement appropriate error handling and responses.

6. Update Notification Icon Task: Update the number of new and unread notifications. Steps: Modify the field in the database that contains the number of unread notification. Update the field in real-time as new notifications are received.

7. Handle Edge Cases Task: Implement error handling for various scenarios. Steps: Handle unauthorized access. Ensure proper handling of notification delivery failures.

8. Write Unit Tests Task: Create unit tests for the notification service and API endpoint. Steps: Test the notification creation and sending logic. Test the API endpoint with different scenarios (valid actions, invalid actions, unauthorized access). Test the real-time functionality using Socket.IO.

9. Code Review and Testing Task: Conduct a code review and run tests. Steps: Submit a pull request for review. Address any feedback from the code review. Ensure all tests pass successfully.

10. Write Documentation Task: Document the API and the notification system. Steps: Write API documentation for the notification endpoint.