Implement Wishlist Feature with Heart Icon Toggle

[sennap]

Wishlist Feature Implementation Plan

Overview

Add a wishlist feature to product cards that allows users to toggle and persist their wishlist selections using a heart icon in the top right corner of each product card.

Implementation Details

1. Wishlist Service Implementation

Create a new service to handle wishlist operations and persistence:

• Interface defining core wishlist operations
• Implementation using SecureStorage for data persistence
• Methods for adding, removing, checking, and retrieving wishlist items

2. UI Component Updates

Modify the ProductCard component to include:

• Heart icon in top right corner
• Toggle functionality
• Visual feedback for wishlist state

3. State Management

• Use SecureStorage for persistent storage
• Implement in-memory caching for performance
• Handle state updates across components

4. Architecture Components

New Components:

• IWishlistService interface
• WishlistService implementation
• WishlistIconConverter for UI state
• WishlistColorConverter for visual feedback

Modified Components:

• ProductCardViewModel - Add wishlist functionality
• ProductCard.xaml - Add heart icon UI
• DI registration for wishlist service

Testing Strategy

1. Unit Tests:

• WishlistService operations
• ViewModel behavior
• State persistence
• UI interactions

2. Integration Tests:

• Storage persistence
• Cross-component communication
• State synchronization

Technical Considerations

Performance

• Async operations for storage access
• In-memory caching to reduce storage reads
• Batch updates for multiple items

Security

• Use SecureStorage for data persistence
• Validate user permissions
• Sanitize input data

UX/UI

• Immediate visual feedback on toggle
• Consistent icon styling
• Clear active/inactive states

Implementation Steps

1. Create Wishlist Service

   • Define interface
   • Implement storage logic
   • Add unit tests

2. Update Product Card

   • Add heart icon to XAML
   • Implement toggle functionality
   • Add state management

3. Add ViewModels

   • Implement wishlist logic
   • Add state management
   • Create converters

4. Testing

   • Unit tests for service
   • UI interaction tests
   • Storage persistence tests

5. Integration

   • Register services
   • Test cross-component behavior
   • Verify state persistence

Dependencies

• SecureStorage for data persistence
• FontAwesome for heart icons
• Existing ProductCard component
• MAUI MVVM infrastructure

Acceptance Criteria

1. Heart icon appears in top right of product cards
2. Icon toggles between filled and outline states
3. Wishlist state persists across app restarts
4. Smooth visual feedback on toggle
5. Proper error handling for storage operations
6. Unit test coverage for new components
7. Performance meets existing app standards

Notes

• Follow existing MAUI patterns
• Maintain async/await consistency
• Use proper error handling
• Document public APIs
• Follow existing naming conventions