Add Ratings and Review Functionality

[aashish-dhiman]

Description:
Enhance the Flipkart Clone project by adding a ratings and review functionality. This feature will allow users to rate products and leave reviews, which will help other users make informed purchasing decisions.

Tasks:

1. Backend Implementation:

   • Product model already has fields for ratings and reviews.
   • Create endpoints for submitting a new rating and review, editing an existing review, and deleting a review.
   • Ensure that each user can only leave one review per product.
   • Calculate the average rating for each product based on user ratings.

2. Frontend Implementation:

   • Add UI components to display the average rating and user reviews on the product detail page.
   • Form to submit new ratings and reviews is already there, just make it working by sending request to server on submission.
   • Provide functionality for users to edit and delete their reviews.
   • Display user reviews in a list with sorting options (e.g., newest first, highest rating).

3. Database Changes:

   • Product schema already includes a reviews array and a ratings field.
   • Ensure that reviews are linked to user IDs and product IDs.

Acceptance Criteria:

• Users should be able to rate products on a scale (e.g., 1 to 5 stars).
• Users should be able to write and submit text reviews for products.
• Each user should be able to edit or delete their own reviews.
• The product detail page should display the average rating and a list of reviews.