[Feature] Shopping Cart Feature

[webmaxru]

Summary

Implement a shopping cart feature allowing users to add products, manage quantities, and proceed to checkout for order placement.

Motivation

The supply chain management application needs a robust shopping cart to streamline the order creation process. This will enhance user experience by allowing temporary product selection, quantity management, and order review before final submission.

Proposed Solution

• Cart State Management: Track selected products with quantities in frontend state or session
• API Endpoints: Create cart operations (add, update quantity, remove items)
• UI Components: Shopping cart page with product list, quantity controls, and total calculation
• Checkout Flow: Integrate with existing order creation API
• Persistence: Option to save cart for later or proceed directly to order

Acceptance Criteria

• Cart state management implemented in frontend (context or local storage)
• Shopping cart page displays added products with quantities and prices
• Users can add/remove items and adjust quantities
• Cart calculates total price and item counts
• Checkout flow creates order from cart items
• Cart clears after successful order placement
• Cart persists across page navigation (session or local storage)
• UI is responsive and follows existing Tailwind design system

Alternatives Considered

• Direct order creation without cart: Less flexible, doesn't allow review/adjustment
• Backend session-based cart: More complex, requires server state management

Additional Context

• Related to existing order management system
• Should integrate with product and pricing data already in the system
• Consider mobile responsiveness for shopping flow

Subtasks

• Design cart data model and state structure
• Create API endpoints for cart operations
• Build cart page component
• Implement checkout flow integration
• Add tests for cart functionality
• Update API documentation