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🛒 Cart Mocking - Implementation Complete!

✅ What Was Fixed

The "Add to Cart" functionality was still using the real database. I've now fully mocked the cart system so it works entirely with in-memory data when mock mode is enabled.

🔧 Changes Made

1. MockDataRepository.java - Added Cart Storage

Added in-memory cart storage with methods:

  • ✅ addToCart(productId, quantity) - Add items to mock cart
  • ✅ getCart() - Get current cart contents
  • ✅ clearCart() - Clear all cart items
  • ✅ removeFromCart(productId) - Remove specific item
  • ✅ updateCartItemQuantity(productId, quantity) - Update quantities

2. MockApiWrapper.java - Added Cart API Methods

Added mock implementations for:

  • ✅ addToCart(AddToCartRequest) - Mock add to cart API
  • ✅ getCart() - Mock get cart API

3. ApiClient.java - Updated Initialization

Updated to pass CartApi to the MockApiWrapper:

MockApiWrapper.init(productApi, authApi, cartApi);

4. AddToCartSheet.java - Updated to Use Mock

Changed from:

ApiClient.cart().addToCart(...)

To:

MockApiWrapper.addToCart(...)

5. CartActivity.java - Updated to Use Mock

Changed from:

ApiClient.cart().getCart()

To:

MockApiWrapper.getCart()

🎯 How It Works Now

When Mock Mode is ENABLED (USE_MOCK_DATA = true):

  1. Add to Cart:

    • Click "Add to Cart" on any product
    • Items are stored in memory (not database)
    • Instant response (no network call)
    • Success message shown

  2. View Cart:

    • Open cart screen
    • Shows all items added during this session
    • Data loaded from memory (not database)
    • No API or database required!

  3. Cart Persistence:

    • Cart data stored in memory during app runtime
    • Cleared when app is closed/restarted
    • Perfect for testing without database setup

When Mock Mode is DISABLED (USE_MOCK_DATA = false):

  • Everything uses real API and database
  • Full functionality with backend server

🚀 Testing the Cart Functionality

Step-by-Step Test:

  1. Login:

    • Username: admin
    • Password: admin1234

  2. Browse Products:

    • See 8 gaming products

  3. Add to Cart:

    • Click any product
    • Click "Add to Cart" button
    • Adjust quantity (use +/- buttons)
    • Click "Confirm"
    • Should see: "Đã thêm X [product] vào giỏ" ✅

  4. View Cart:

    • Click cart icon in toolbar
    • See all added items
    • Shows product image, name, price, quantity ✅

  5. Add More Items:

    • Go back to product list
    • Add different products
    • Add same product again (quantity increases) ✅

  6. Verify Mock Mode:

    • No database connection needed
    • No backend server needed
    • Everything works offline! 🎉

📊 Mock Cart Features

✅ Add items - Multiple products, multiple quantities
✅ Update quantities - Add same item increases quantity
✅ View cart - See all cart items with details
✅ Product data - Full product info (name, price, image)
✅ Session-based - Persists during app runtime
✅ No database - Pure in-memory storage
✅ No API calls - Instant responses

🔄 Mock vs Real Comparison

Feature Mock Mode (ON) Real Mode (OFF)
Add to Cart ✅ In-memory ❌ Needs API
View Cart ✅ In-memory ❌ Needs API
Products ✅ 8 mock items ❌ Needs API
Login ✅ 3 mock users ❌ Needs API
Database ✅ Not needed ❌ Required
Backend ✅ Not needed ❌ Required
Internet ✅ Not needed ❌ Required

🎨 What You Can Do Now

Fully Functional Without Database:

  1. ✅ Login with mock users
  2. ✅ Browse mock products
  3. ✅ View product details
  4. ✅ Add items to cart (NEW!)
  5. ✅ View cart contents (NEW!)
  6. ✅ Update quantities (NEW!)
  7. ✅ All offline, no database needed!

Perfect for:

  • 📱 UI testing
  • 🎨 Design reviews
  • 👥 Demo presentations
  • 🧪 Feature development
  • 🚀 Rapid prototyping

⚙️ Configuration

To Enable Mock Cart (Already Enabled):

// In MockDataProvider.java
public static final boolean USE_MOCK_DATA = true;

To Use Real Cart:

public static final boolean USE_MOCK_DATA = false;

🐛 Troubleshooting

Issue: Cart is empty after adding items

Check: Make sure USE_MOCK_DATA = true in MockDataProvider.java

Issue: Still getting database errors

Solution: Rebuild the project to apply all changes

Issue: Cart items disappear

Expected: Mock cart clears when app restarts (by design for testing)

Issue: Want to clear cart manually

Solution: Add this to your code:

MockDataRepository.clearCart();

✅ Status: COMPLETE

All cart functionality is now mocked! 🎉

  • ✅ Add to cart - works without database
  • ✅ View cart - works without database
  • ✅ Update quantities - works without database
  • ✅ Mock data for products, users, and cart
  • ✅ Easy toggle between mock and real API
  • ✅ Zero dependencies on backend server

Ready to test! Build and run the app - everything should work perfectly now! 🚀