add favorite

docs/favorite.sh

@@ -0,0 +1,81 @@
+#!/bin/bash
+
+# Favorites Feature Simplification Summary
+# Date: 2025-11-18
+# 
+# CHANGES MADE:
+# =============
+#
+# 1. Simplified favorites_provider.dart
+#    - Removed old Favorites provider (Set<String> of product IDs)
+#    - Kept only FavoriteProducts provider (List<Product>)
+#    - Helper providers now derive from FavoriteProducts:
+#      * isFavorite(productId) - checks if product is in list
+#      * favoriteCount() - counts products in list
+#      * favoriteProductIds() - maps to list of product IDs
+#    - Add/remove methods now use favoriteProductsProvider.notifier
+#    - No userId filtering - uses authenticated API session
+#
+# 2. Updated favorites_page.dart
+#    - Changed clearAll to show "under development" message
+#    - Still watches favoriteProductsProvider (already correct)
+#
+# 3. Updated favorite_product_card.dart
+#    - Changed from favoritesProvider.notifier to favoriteProductsProvider.notifier
+#    - Remove favorite now calls the correct provider
+#
+# 4. Updated product_detail_page.dart
+#    - Changed toggleFavorite from favoritesProvider.notifier to favoriteProductsProvider.notifier
+#
+# KEY BEHAVIORS:
+# ==============
+#
+# - All favorites operations work with Product entities directly
+# - No userId parameter needed in UI code
+# - Repository methods still use 'current_user' as dummy userId for backwards compatibility
+# - API calls use authenticated session (token-based)
+# - Add/remove operations refresh the products list after success
+# - Helper providers safely return defaults during loading/error states
+#
+# FILES MODIFIED:
+# ==============
+# 1. lib/features/favorites/presentation/providers/favorites_provider.dart
+# 2. lib/features/favorites/presentation/pages/favorites_page.dart
+# 3. lib/features/favorites/presentation/widgets/favorite_product_card.dart
+# 4. lib/features/products/presentation/pages/product_detail_page.dart
+#
+# ARCHITECTURE:
+# ============
+#
+# Main Provider:
+#   FavoriteProducts (AsyncNotifierProvider<List<Product>>)
+#     ├── build() - loads products from repository
+#     ├── addFavorite(productId) - calls API, refreshes list
+#     ├── removeFavorite(productId) - calls API, refreshes list
+#     ├── toggleFavorite(productId) - adds or removes based on current state
+#     └── refresh() - manual refresh for pull-to-refresh
+#
+# Helper Providers (derived from FavoriteProducts):
+#   isFavorite(productId) - bool
+#   favoriteCount() - int
+#   favoriteProductIds() - List<String>
+#
+# Data Flow:
+#   UI -> FavoriteProducts.notifier.method() -> Repository -> API
+#   API Response -> Repository caches locally -> Provider updates state
+#   Helper Providers watch FavoriteProducts and derive values
+#
+# TESTING:
+# ========
+# To verify the changes work:
+# 1. Add products to favorites from product detail page
+# 2. View favorites page - should load product list
+# 3. Remove products from favorites page
+# 4. Toggle favorites from product cards
+# 5. Check that favoriteCount updates in real-time
+# 6. Test offline mode - should use cached products
+
+echo "Favorites feature simplified successfully!"
+echo "Main provider: FavoriteProducts (List<Product>)"
+echo "Helper providers derive from product list"
+echo "No userId filtering - uses API auth session"