[VNDA] Feat: create addItems action

Pull Request: Add Bulk Item Addition to Cart Action

Summary

This PR introduces a new action that allows for bulk addition of items to the cart, enhancing performance and user experience. This feature is especially useful for "Buy Together" functionalities commonly utilized in e-commerce platforms.

Changes Made

Created an asynchronous action function that accepts a list of items to be added to the cart.
Implemented error handling for missing cart cookies, returning a 400 HTTP error if the cookie is absent.
Enhanced the payload structure to match the OpenAPI standards for bulk item addition, as specified in the VNDA documentation: VNDA API Documentation.
Introduced a new loader to optimize the retrieval of cart data after items are added.

Key Points

Input: The action takes a Props object containing an array of items, each with an itemId, quantity, and optional attributes.
Output: Returns the updated cart state after the items have been added.
Compliance: Followed the VNDA API documentation to ensure compatibility and correctness.

Rationale for Loader Creation

The introduction of the loader is crucial for implementing the "Buy Together" feature effectively. This loader is designed to:

Improve Performance: It optimizes the retrieval process for cart data, ensuring faster responses and a smoother user experience.
Suitability for Use Case: It aligns perfectly with scenarios where multiple items are added at once, making the data fetching more efficient and tailored to the needs of e-commerce applications.

Testing

Please ensure to test the action with various scenarios, including:
- Adding multiple items successfully.
- Handling of missing cart cookies.
- Correct formatting of item attributes.

Additional Notes

This implementation not only enhances the user experience by allowing bulk operations but also prepares the application for more advanced e-commerce features in the future.

deco-cx / apps