# Flutter Mobile App - Worker (EuroTile & Vasta Stone) Expert Guidelines ## 🎯 App Overview A Flutter-based mobile application designed for contractors, distributors, architects, and brokers in the tile, interior, and construction industry. The app combines a powerful loyalty program with convenient ordering tools and project management capabilities. ### 🎯 Main Objectives: - Powerful loyalty platform with rewards and membership tiers (Diamond/Platinum/Gold) - Quick and efficient product ordering system - Project, contract, and quote management - Integration with promotions and special offers - Real-time chat support ### 👥 Target Users: - **Contractors (Thầu thợ)**: Construction project managers - **Architects (Kiến trúc sư)**: Design professionals - **Distributors (Đại lý phân phối)**: Product resellers - **Real estate brokers (Môi giới)**: Real estate and construction brokers ### 📁 Reference Materials: The `html/` folder contains UI/UX reference mockups that show the desired design and flow. These HTML files serve as design specifications for the Flutter implementation. --- ## 🤖 SUBAGENT DELEGATION SYSTEM 🤖 **CRITICAL: BE PROACTIVE WITH SUBAGENTS! YOU HAVE SPECIALIZED EXPERTS AVAILABLE!** ### 🚨 DELEGATION MINDSET **Instead of thinking "I'll handle this myself"** **Think: "Which specialist is BEST suited for this task?"** ### 📋 AVAILABLE SPECIALISTS You have access to these expert subagents - USE THEM PROACTIVELY: #### 🎨 **flutter-widget-expert** - **MUST BE USED for**: Loyalty cards, member cards, product grids, order cards, project cards, chat UI, form layouts, bottom navigation - **Triggers**: "create widget", "build UI", "card design", "layout", "animation", "custom widget", "loyalty card", "member card" #### 📊 **riverpod-expert** - **MUST BE USED for**: Cart state, authentication state, loyalty points state, product state, order state, project state - **Triggers**: "state management", "provider", "riverpod", "async state", "data flow", "cart", "auth state" #### 🗄️ **hive-expert** - **MUST BE USED for**: Local database, offline storage, cart persistence, user data caching, loyalty points cache - **Triggers**: "database", "cache", "hive", "local storage", "persistence", "offline", "box" #### 🌐 **api-integration-expert** - **MUST BE USED for**: Authentication API, OTP verification, product API, loyalty API, order API, project API - **Triggers**: "API", "HTTP", "dio", "REST", "backend", "authentication", "OTP", "sync" #### 🏗️ **architecture-expert** - **MUST BE USED for**: Feature organization, clean architecture setup, dependency injection, navigation structure - **Triggers**: "architecture", "structure", "organization", "clean code", "refactor", "navigation" #### ⚡ **performance-expert** - **MUST BE USED for**: Image caching, list optimization, memory management, app performance - **Triggers**: "performance", "optimization", "memory", "image cache", "slow", "lag", "scroll" ### 🎯 DELEGATION STRATEGY **BEFORE starting ANY task, ASK YOURSELF:** 1. "Which of my specialists could handle this better?" 2. "Should I break this into parts for different specialists?" 3. "Would a specialist complete this faster and better?" ### 💼 WORK BALANCE RECOMMENDATION: - **Simple Tasks (20%)**: Handle independently - quick fixes, minor updates - **Complex Tasks (80%)**: Delegate to specialists for expert-level results ### 🔧 HOW TO DELEGATE ``` # Explicit delegation examples: > Use the flutter-widget-expert to create the Diamond/Platinum/Gold loyalty card widget > Have the riverpod-expert design the authentication and user session state management > Ask the hive-expert to create the local database schema for products and orders > Use the api-integration-expert to implement OTP authentication flow > Have the architecture-expert organize the loyalty program feature structure > Ask the performance-expert to optimize the product grid scrolling ``` --- ## Flutter Best Practices - Use Flutter 3.x features and Material 3 design - Implement clean architecture with Riverpod for state management - Use Hive for local database and offline functionality - Follow proper dependency injection with Riverpod DI - Implement proper error handling and user feedback - Follow iOS and Android platform-specific design guidelines - Support Vietnamese language (primary) and English (secondary) - Mobile-first design optimized for phone screens --- ## Worker App Project Structure ``` lib/ core/ constants/ api_constants.dart # API endpoints, timeouts app_constants.dart # App config, defaults, loyalty tiers ui_constants.dart # Spacing, sizes, colors storage_constants.dart # Hive box names, keys theme/ app_theme.dart # Material 3 theme (primary blue #005B9A) colors.dart # Brand color schemes typography.dart # Roboto text styles network/ dio_client.dart # HTTP client setup api_interceptor.dart # Auth token, logging interceptors network_info.dart # Connectivity status errors/ exceptions.dart # Custom exceptions failures.dart # Failure classes utils/ formatters.dart # Currency, date, phone formatters validators.dart # Form validation (Vietnamese phone, email) extensions.dart # Dart extensions qr_generator.dart # QR code generation for member cards widgets/ custom_button.dart # Primary, secondary buttons loading_indicator.dart # Loading states error_widget.dart # Error displays empty_state.dart # Empty list UI bottom_nav_bar.dart # Main bottom navigation floating_chat_button.dart # FAB for chat features/ auth/ data/ datasources/ auth_remote_datasource.dart # Login, OTP, register APIs auth_local_datasource.dart # Token storage models/ user_model.dart # User with tier info otp_response_model.dart repositories/ auth_repository_impl.dart domain/ entities/ user.dart # id, name, phone, email, tier, points repositories/ auth_repository.dart usecases/ login_with_phone.dart verify_otp.dart register_user.dart logout.dart get_current_user.dart presentation/ providers/ auth_provider.dart otp_timer_provider.dart pages/ login_page.dart # Phone input otp_verification_page.dart # 6-digit OTP register_page.dart # Full registration form widgets/ phone_input_field.dart otp_input_field.dart # Auto-focus 6 digits user_type_selector.dart # Contractor/Architect/etc home/ data/ datasources/ member_card_local_datasource.dart models/ member_card_model.dart presentation/ providers/ member_card_provider.dart pages: home_page.dart # Main dashboard widgets: diamond_member_card.dart # Gradient card with QR platinum_member_card.dart gold_member_card.dart quick_action_grid.dart loyalty/ data/ datasources: loyalty_remote_datasource.dart loyalty_local_datasource.dart models: loyalty_points_model.dart loyalty_transaction_model.dart reward_model.dart gift_model.dart referral_model.dart repositories: loyalty_repository_impl.dart domain: entities: loyalty_points.dart # currentPoints, tier, nextTierPoints loyalty_transaction.dart # id, type, amount, description, date reward.dart # id, title, pointsCost, image, expiry gift.dart # id, code, status, validFrom, validTo referral.dart # code, link, totalReferrals, pointsEarned repositories: loyalty_repository.dart usecases: get_loyalty_points.dart get_points_history.dart redeem_reward.dart get_available_rewards.dart get_my_gifts.dart get_referral_info.dart share_referral.dart presentation: providers: loyalty_points_provider.dart points_history_provider.dart rewards_provider.dart gifts_provider.dart referral_provider.dart pages: loyalty_page.dart # Progress bar, tier info rewards_page.dart # Grid of redeemable rewards points_history_page.dart # Transaction list referral_page.dart # Referral link & code my_gifts_page.dart # Tabs: Active/Used/Expired widgets: tier_progress_bar.dart points_badge.dart reward_card.dart gift_card.dart referral_share_sheet.dart products/ data: datasources: product_remote_datasource.dart product_local_datasource.dart models: product_model.dart # Tile/construction products category_model.dart repositories: product_repository_impl.dart domain: entities: product.dart # id, name, sku, price, images, category category.dart repositories: product_repository.dart usecases: get_all_products.dart search_products.dart get_products_by_category.dart get_product_details.dart presentation: providers: products_provider.dart product_search_provider.dart categories_provider.dart pages: products_page.dart # Grid with search & filters product_detail_page.dart widgets: product_grid.dart product_card.dart product_search_bar.dart category_filter_chips.dart cart/ data: datasources: cart_local_datasource.dart # Hive persistence models: cart_item_model.dart repositories: cart_repository_impl.dart domain: entities: cart_item.dart # productId, quantity, price repositories: cart_repository.dart usecases: add_to_cart.dart remove_from_cart.dart update_quantity.dart clear_cart.dart get_cart_items.dart calculate_cart_total.dart presentation: providers: cart_provider.dart cart_total_provider.dart pages: cart_page.dart checkout_page.dart order_success_page.dart widgets: cart_item_card.dart cart_summary.dart quantity_selector.dart payment_method_selector.dart orders/ data: datasources: order_remote_datasource.dart order_local_datasource.dart models: order_model.dart order_item_model.dart payment_model.dart repositories: order_repository_impl.dart domain: entities: order.dart # orderNumber, items, total, status order_item.dart payment.dart repositories: order_repository.dart usecases: create_order.dart get_orders.dart get_order_details.dart get_payments.dart presentation: providers: orders_provider.dart order_filter_provider.dart payments_provider.dart pages: orders_page.dart # Tabs by status order_detail_page.dart payments_page.dart widgets: order_card.dart order_status_badge.dart order_timeline.dart payment_card.dart projects/ data: datasources: project_remote_datasource.dart project_local_datasource.dart models: project_model.dart quote_model.dart repositories: project_repository_impl.dart domain: entities: project.dart # name, client, location, progress, status quote.dart # number, client, amount, validity, status repositories: project_repository.dart usecases: create_project.dart get_projects.dart update_project_progress.dart create_quote.dart get_quotes.dart presentation: providers: projects_provider.dart project_form_provider.dart quotes_provider.dart pages: projects_page.dart # List with progress bars project_create_page.dart # Form project_detail_page.dart quotes_page.dart quote_create_page.dart widgets: project_card.dart project_progress_bar.dart quote_card.dart project_form.dart chat/ data: datasources: chat_remote_datasource.dart # WebSocket/REST chat_local_datasource.dart models: message_model.dart chat_room_model.dart repositories: chat_repository_impl.dart domain: entities: message.dart # id, text, senderId, timestamp, isRead chat_room.dart repositories: chat_repository.dart usecases: send_message.dart get_messages.dart mark_as_read.dart presentation: providers: chat_provider.dart messages_provider.dart typing_indicator_provider.dart pages: chat_page.dart widgets: message_bubble.dart message_input.dart typing_indicator.dart chat_app_bar.dart account/ data: datasources: profile_remote_datasource.dart profile_local_datasource.dart address_datasource.dart models: profile_model.dart address_model.dart repositories: profile_repository_impl.dart address_repository_impl.dart domain: entities: profile.dart # Extended user info address.dart # Delivery addresses repositories: profile_repository.dart address_repository.dart usecases: get_profile.dart update_profile.dart upload_avatar.dart change_password.dart get_addresses.dart add_address.dart update_address.dart delete_address.dart presentation: providers: profile_provider.dart avatar_provider.dart addresses_provider.dart pages: account_page.dart # Menu profile_edit_page.dart addresses_page.dart address_form_page.dart password_change_page.dart widgets: profile_header.dart account_menu_item.dart address_card.dart avatar_picker.dart promotions/ data: datasources: promotion_remote_datasource.dart models: promotion_model.dart repositories: promotion_repository_impl.dart domain: entities: promotion.dart # title, description, discount, validity repositories: promotion_repository.dart usecases: get_active_promotions.dart presentation: providers: promotions_provider.dart pages: promotions_page.dart widgets: promotion_card.dart promotion_banner.dart notifications/ data: datasources: notification_remote_datasource.dart notification_local_datasource.dart models: notification_model.dart repositories: notification_repository_impl.dart domain: entities: notification.dart # title, body, type, isRead, timestamp repositories: notification_repository.dart usecases: get_notifications.dart mark_as_read.dart clear_all.dart presentation: providers: notifications_provider.dart notification_badge_provider.dart pages: notifications_page.dart # Tabs: All/Orders/System/Promos widgets: notification_card.dart notification_badge.dart shared/ widgets/ custom_app_bar.dart gradient_card.dart # For member cards status_badge.dart price_display.dart vietnamese_phone_field.dart date_picker_field.dart main.dart app.dart # Root widget with ProviderScope test/ unit/ features/ auth/ loyalty/ products/ cart/ orders/ projects/ widget/ widgets/ integration/ ``` --- # App Context - Worker Mobile App ## About This App A comprehensive Flutter mobile application designed for workers in the tile and construction industry. The app enables contractors, architects, distributors, and brokers to manage their loyalty rewards, browse products, create orders, manage construction projects, and track business performance—all through an intuitive mobile interface optimized for speed and efficiency. ## Design References The `html/` folder contains 25+ HTML mockup files that serve as UI/UX design references: - Visual design and layout specifications - Color schemes and branding - User flow and navigation patterns - Component designs and interactions - Form layouts and validation patterns **These HTML files should be referenced when building Flutter widgets to match the desired design.** --- ## Core Features ### 🔐 Authentication System #### Login Flow **Pages**: `login_page.dart`, `otp_verification_page.dart`, `register_page.dart` **Features**: - Phone number-based authentication (Vietnamese format) - 6-digit OTP verification with auto-focus - Auto-advance between OTP input fields - Resend OTP with 60-second cooldown timer - Full registration form with user type selection - Form validation for all fields **State Management**: ```dart final authProvider = AsyncNotifierProvider final otpTimerProvider = StateNotifierProvider ``` **Key Widgets**: - `PhoneInputField`: Vietnamese phone number format (+84) - `OTPInputField`: 6-digit auto-focus input - `UserTypeSelector`: Radio buttons for Contractor/Architect/Distributor/Broker **Design Reference**: `html/login.html`, `html/otp.html`, `html/register.html` --- ### 🏠 Home Screen with Membership Cards **Purpose**: Dashboard showing member tier card and quick access to features **Pages**: `home_page.dart` **Key Features**: - **Membership Card Display**: - Three tier widgets: `DiamondMemberCard`, `PlatinumMemberCard`, `GoldMemberCard` - Gradient backgrounds (blue-purple for Diamond, grey-silver for Platinum, yellow-gold for Gold) - Member name, ID, and points balance - QR code generation for member identification - Animated card transitions - **Quick Action Grid**: - 4-6 icon buttons for main features - Products, Loyalty, Orders, Projects, Promotions - **Bottom Navigation**: - 5 tabs: Home, Products, Loyalty, Account, More - Active state indicators - Badge for notifications - **Floating Action Button**: - Chat support access - Positioned bottom-right - Accent cyan color (#35C6F4) **State Management**: ```dart final memberCardProvider = Provider((ref) { final user = ref.watch(authProvider).user; return MemberCard( tier: user.memberTier, name: user.name, memberId: user.id, points: user.points, qrCode: generateQRCode(user.id), ); }); ``` **Design Reference**: `html/index.html` --- ### 🎁 Loyalty Program System #### Main Loyalty Page **Page**: `loyalty_page.dart` **Features**: - **Tier Progress Display**: - Current points and tier - Progress bar to next tier (%) - Points needed for next tier - Animated progress indicator - **Tier Benefits Cards**: - Points multiplier info - Special offers access - Exclusive discounts - Priority support - **Quick Actions**: - Navigate to rewards, history, referral, gifts **Widgets**: - `TierProgressBar`: Custom painted progress with gradient - `PointsBadge`: Circular points display - `TierBenefitsCard`: Expandable card with benefits list **State Management**: ```dart final loyaltyPointsProvider = AsyncNotifierProvider ``` **Design Reference**: `html/loyalty.html` --- #### Rewards Page **Page**: `rewards_page.dart` **Features**: - Grid of available rewards to redeem - Filter by category (Vouchers/Products/Services) - Reward cards showing: - Image - Title and description - Points cost - Expiration date - Redeem button (disabled if insufficient points) - Redemption confirmation dialog - Success animation and gift code display **Widgets**: - `RewardCard`: Card with image, info, and redeem button - `RewardRedemptionDialog`: Confirmation dialog - `GiftCodeDisplay`: Copy-able gift code after redemption **Design Reference**: `html/loyalty-rewards.html` --- #### Points History Page **Page**: `points_history_page.dart` **Features**: - List of all points transactions - Transaction cards showing: - Type (earned/spent) with icon and color - Points amount (+/- display) - Description - Date and time - New balance after transaction - Filter by date range (Today/Week/Month/All) - Dispute button for each transaction - Pull-to-refresh **Widgets**: - `PointsTransactionCard`: Card with transaction details - `DateRangeFilter`: Chip filter row - `DisputeButton`: Opens support dialog **Design Reference**: `html/points-history.html` --- #### Referral Program Page **Page**: `referral_page.dart` **Features**: - User avatar and tier display - Total referrals count - Total points earned from referrals - Referral code (large, copy-able) - Referral link (copy and share buttons) - Share sheet integration (WhatsApp, Telegram, etc.) - Benefits explanation cards - How it works guide **Widgets**: - `ReferralInfoCard`: Stats display - `ReferralCodeDisplay`: Large code with copy button - `ReferralLinkShare`: Link with copy/share buttons - `ReferralShareSheet`: Bottom sheet with share options **State Management**: ```dart final referralProvider = AsyncNotifierProvider ``` **Design Reference**: `html/referral.html` --- #### My Gifts Page **Page**: `my_gifts_page.dart` **Features**: - Tabs: Active (valid), Used, Expired - Gift cards showing: - Gift image and title - Gift code (copy-able) - Valid from/to dates - Usage instructions - Status badge - Use button (for active gifts) - Empty state for each tab - Filter and sort options **Widgets**: - `GiftCard`: Card with gift details and actions - `GiftStatusBadge`: Color-coded status (green/grey/red) - `GiftCodeCopy`: Code with copy button **Design Reference**: `html/my-gifts.html` --- ### 🛍️ Products & Shopping #### Products Page **Page**: `products_page.dart` **Features**: - Search bar with real-time filtering - Category filter chips (horizontal scroll) - Product grid (2 columns) - Product cards showing: - Image with cached_network_image - Product name and SKU - Price (with sale price if applicable) - Stock indicator - Add to cart button - Pull-to-refresh - Infinite scroll pagination - Empty state **Widgets**: - `ProductGrid`: GridView.builder with pagination - `ProductCard`: Card with image, info, and actions - `ProductSearchBar`: Search with clear button - `CategoryFilterChips`: Horizontal chip list **State Management**: ```dart final productsProvider = AsyncNotifierProvider> final productSearchProvider = StateProvider final selectedCategoryProvider = StateProvider ``` **Design Reference**: `html/products.html` --- #### Cart & Checkout **Pages**: `cart_page.dart`, `checkout_page.dart`, `order_success_page.dart` **Cart Features**: - List of cart items - Item cards with: - Product image and name - Price per unit - Quantity selector (+/-) - Remove button - Line total - Cart summary: - Subtotal - Discount (if applied) - Shipping - Total - Clear cart button - Checkout button **Checkout Features**: - Delivery address selection/entry - Payment method selection (COD/Bank Transfer/Card/E-wallet) - Order summary - Place order button with loading state - Form validation **Success Features**: - Success animation (Lottie) - Order number display - Estimated delivery date - Order details summary - Action buttons: View order, Continue shopping **State Management**: ```dart final cartProvider = NotifierProvider> final cartTotalProvider = Provider ``` **Design Reference**: `html/cart.html`, `html/checkout.html`, `html/order-success.html` --- ### 📦 Orders Management **Pages**: `orders_page.dart`, `order_detail_page.dart`, `payments_page.dart` **Orders Features**: - Tab bar for status filtering: - All, Pending, Processing, Shipping, Completed, Cancelled - Order cards showing: - Order number and date - Customer info (for distributors/brokers) - Product list (collapsed) - Total amount - Status badge (color-coded) - Action buttons (View details, Track) - Search by order number - Filter by date range - Pull-to-refresh **Order Detail Features**: - Full order information - Timeline showing order status progression - Product list with images - Delivery address - Payment info - Action buttons (Contact support, Reorder) **Payments Features**: - List of payment transactions - Payment cards showing: - Payment ID - Order reference - Amount - Payment method - Date - Status (Processing/Completed) - Search and filter options **State Management**: ```dart final ordersProvider = AsyncNotifierProvider> final orderFilterProvider = StateProvider final paymentsProvider = AsyncNotifierProvider> ``` **Design Reference**: `html/orders.html`, `html/payments.html` --- ### 🏗️ Projects & Quotes Management #### Projects **Pages**: `projects_page.dart`, `project_create_page.dart`, `project_detail_page.dart` **Projects Features**: - List of construction projects - Project cards showing: - Project name and code - Client/owner info - Location - Start and end dates - Progress bar (%) - Status badge (Planning/In Progress/Completed) - Budget/value - Create new project FAB - Filter by status, date, client - Search projects **Project Create Features**: - Form with fields: - Project name and code - Client name and phone - Location/address - Start/end dates - Project type (Residential/Commercial/Industrial) - Budget - Description and notes - Form validation - Save draft functionality - Date pickers - Auto-generate project code option **State Management**: ```dart final projectsProvider = AsyncNotifierProvider> final projectFormProvider = StateNotifierProvider ``` **Design Reference**: `html/projects.html`, `html/project-create.html` --- #### Quotes **Pages**: `quotes_page.dart`, `quote_create_page.dart` **Quotes Features**: - List of quotations - Quote cards showing: - Quote number and date - Client info - Total amount - Validity period - Status badge (Draft/Sent/Accepted/Rejected/Expired) - Actions: - Create new quote - Edit draft - Send to client - Convert to order - Duplicate - Search and filter **Design Reference**: `html/quotes.html` --- ### 💬 Chat Support **Pages**: `chat_page.dart` **Features**: - Real-time chat interface - Message bubbles (sent/received) - Timestamp for messages - User avatars - Typing indicator animation - Message input with send button - File attachment button - Auto-scroll to latest message - Read receipts - Support agent info header **Widgets**: - `MessageBubble`: Custom bubble with tail - `MessageInput`: Text field with send button - `TypingIndicator`: Animated dots - `ChatAppBar`: Custom app bar with agent info **State Management**: ```dart final chatProvider = AsyncNotifierProvider final messagesProvider = StreamProvider> final typingIndicatorProvider = StateProvider ``` **Design Reference**: `html/chat.html` --- ### 👤 Account Management #### Account Page **Page**: `account_page.dart` **Features**: - Profile header with avatar, name, tier, points - Menu sections: - Personal: Profile, Password, Addresses - Business: Company info, Tax info - Settings: Notifications, Language, Theme - Support: Help, Contact, Terms, Privacy - App: Version, Logout - Navigation to sub-pages - Logout confirmation dialog **Design Reference**: `html/account.html` --- #### Profile Edit **Page**: `profile_edit_page.dart` **Features**: - Avatar upload with image picker - Image cropping - Form fields: - Full name - Email - Phone (read-only) - Date of birth - Gender - Company name - Tax ID - Business address - User type - Form validation - Unsaved changes warning - Save/cancel buttons **Widgets**: - `AvatarPicker`: Image picker with crop - `DatePickerField`: Date selection - `GenderSelector`: Radio buttons **Design Reference**: `html/profile-edit.html` --- #### Addresses Management **Pages**: `addresses_page.dart`, `address_form_page.dart` **Features**: - List of saved addresses - Address cards with: - Label (Home/Office/Other) - Recipient name and phone - Full address - Default badge - Edit/delete actions - Add new address FAB - Set as default toggle - Form with: - Recipient name - Phone number - Address fields (Street, City, District, Ward, Postal code) - Address type - Set as default checkbox - Form validation **Design Reference**: `html/addresses.html` --- #### Change Password **Page**: `password_change_page.dart` **Features**: - Form with: - Current password - New password - Confirm new password - Show/hide password toggles - Password strength indicator - Requirements checklist: - Min 8 characters - Uppercase letter - Lowercase letter - Number - Special character - Real-time validation - Success message and redirect **Widgets**: - `PasswordStrengthIndicator`: Visual strength meter - `PasswordRequirements`: Checklist with check/cross icons **Design Reference**: `html/password-change.html` --- ### 🎉 Promotions & Notifications #### Promotions **Page**: `promotions_page.dart` **Features**: - List of active promotions - Promotion cards with: - Banner image - Title and description - Discount percentage/amount - Validity period - Terms and conditions - Apply/claim button - Filter by category - Status indicators (Active/Upcoming/Expired) **Design Reference**: `html/promotions.html` --- #### Notifications **Page**: `notifications_page.dart` **Features**: - Tabs: All, Orders, System, Promotions - Notification cards with: - Icon/avatar - Title and content - Timestamp - Read/unread indicator - Action buttons - Mark as read - Clear all button - Pull-to-refresh - Badge count on bottom nav **Design Reference**: `html/notifications.html` --- ## UI/UX Design System ### Color Palette ```dart // colors.dart class AppColors { // Primary static const primaryBlue = Color(0xFF005B9A); static const lightBlue = Color(0xFF38B6FF); static const accentCyan = Color(0xFF35C6F4); // Status static const success = Color(0xFF28a745); static const warning = Color(0xFFffc107); static const danger = Color(0xFFdc3545); static const info = Color(0xFF17a2b8); // Neutrals static const grey50 = Color(0xFFf8f9fa); static const grey100 = Color(0xFFe9ecef); static const grey500 = Color(0xFF6c757d); static const grey900 = Color(0xFF343a40); // Tier Gradients static const diamondGradient = LinearGradient( colors: [Color(0xFF4A00E0), Color(0xFF8E2DE2)], begin: Alignment.topLeft, end: Alignment.bottomRight, ); static const platinumGradient = LinearGradient( colors: [Color(0xFF7F8C8D), Color(0xFFBDC3C7)], begin: Alignment.topLeft, end: Alignment.bottomRight, ); static const goldGradient = LinearGradient( colors: [Color(0xFFf7b733), Color(0xFFfc4a1a)], begin: Alignment.topLeft, end: Alignment.bottomRight, ); } ``` ### Typography ```dart // typography.dart class AppTypography { static const fontFamily = 'Roboto'; static const displayLarge = TextStyle( fontSize: 32, fontWeight: FontWeight.bold, fontFamily: fontFamily, ); static const headlineLarge = TextStyle( fontSize: 24, fontWeight: FontWeight.w600, fontFamily: fontFamily, ); static const titleLarge = TextStyle( fontSize: 20, fontWeight: FontWeight.w500, fontFamily: fontFamily, ); static const bodyLarge = TextStyle( fontSize: 16, fontWeight: FontWeight.normal, fontFamily: fontFamily, ); static const labelSmall = TextStyle( fontSize: 12, fontWeight: FontWeight.normal, fontFamily: fontFamily, ); } ``` ### Component Specifications #### Member Card Design ```dart class MemberCardSpecs { static const double width = double.infinity; static const double height = 200; static const double borderRadius = 16; static const double elevation = 8; static const EdgeInsets padding = EdgeInsets.all(20); // QR Code static const double qrSize = 80; static const double qrBackgroundSize = 90; // Points Display static const double pointsFontSize = 28; static const FontWeight pointsFontWeight = FontWeight.bold; } ``` #### Status Badges ```dart class StatusBadge extends StatelessWidget { final String status; final Color color; static Color getColorForStatus(OrderStatus status) { switch (status) { case OrderStatus.pending: return AppColors.info; case OrderStatus.processing: return AppColors.warning; case OrderStatus.shipping: return AppColors.lightBlue; case OrderStatus.completed: return AppColors.success; case OrderStatus.cancelled: return AppColors.danger; } } } ``` #### Bottom Navigation ```dart class BottomNavSpecs { static const double height = 72; static const double iconSize = 24; static const double selectedIconSize = 28; static const double labelFontSize = 12; static const Color selectedColor = AppColors.primaryBlue; static const Color unselectedColor = AppColors.grey500; } ``` #### Floating Action Button ```dart class FABSpecs { static const double size = 56; static const double elevation = 6; static const Color backgroundColor = AppColors.accentCyan; static const Color iconColor = Colors.white; static const double iconSize = 24; static const Offset position = Offset(16, 16); // from bottom-right } ``` --- ## Technical Architecture ### State Management (Riverpod 2.x) #### Authentication State ```dart @riverpod class Auth extends _$Auth { @override Future build() async { final token = await _getStoredToken(); if (token != null) { final user = await _getUserFromToken(token); return AuthState.authenticated(user); } return const AuthState.unauthenticated(); } Future loginWithPhone(String phone) async { state = const AsyncValue.loading(); state = await AsyncValue.guard(() async { await ref.read(authRepositoryProvider).requestOTP(phone); return AuthState.otpSent(phone); }); } Future verifyOTP(String phone, String otp) async { state = const AsyncValue.loading(); state = await AsyncValue.guard(() async { final response = await ref.read(authRepositoryProvider).verifyOTP(phone, otp); await _storeToken(response.token); return AuthState.authenticated(response.user); }); } } ``` #### Cart State ```dart @riverpod class Cart extends _$Cart { @override List build() { return ref.watch(cartRepositoryProvider).getCartItems(); } void addItem(Product product, int quantity) { state = [ ...state, CartItem( id: product.id, productName: product.name, price: product.price, quantity: quantity, imageUrl: product.images.first, ), ]; _persistCart(); } void updateQuantity(String itemId, int quantity) { state = state.map((item) { if (item.id == itemId) { return item.copyWith(quantity: quantity); } return item; }).toList(); _persistCart(); } void removeItem(String itemId) { state = state.where((item) => item.id != itemId).toList(); _persistCart(); } void clear() { state = []; _persistCart(); } void _persistCart() { ref.read(cartRepositoryProvider).saveCart(state); } } @riverpod double cartTotal(CartTotalRef ref) { final items = ref.watch(cartProvider); return items.fold(0, (sum, item) => sum + (item.price * item.quantity)); } ``` #### Loyalty Points State ```dart @riverpod class LoyaltyPoints extends _$LoyaltyPoints { @override Future build() async { return await ref.read(loyaltyRepositoryProvider).getLoyaltyPoints(); } Future refresh() async { state = const AsyncValue.loading(); state = await AsyncValue.guard(() async { return await ref.read(loyaltyRepositoryProvider).getLoyaltyPoints(); }); } Future redeemReward(Reward reward) async { final result = await ref.read(loyaltyRepositoryProvider).redeemReward(reward.id); if (result.success) { await refresh(); // Show success dialog with gift code } } } ``` --- ### Database Schema (Hive) #### User Model ```dart @HiveType(typeId: 0) class UserModel extends HiveObject { @HiveField(0) final String id; @HiveField(1) final String name; @HiveField(2) final String phone; @HiveField(3) final String email; @HiveField(4) final String? avatar; @HiveField(5) final MemberTier memberTier; // diamond, platinum, gold @HiveField(6) final int points; @HiveField(7) final String referralCode; @HiveField(8) final String? company; @HiveField(9) final UserType userType; // contractor, architect, distributor, broker @HiveField(10) final DateTime createdAt; } ``` #### Product Model ```dart @HiveType(typeId: 1) class ProductModel extends HiveObject { @HiveField(0) final String id; @HiveField(1) final String name; @HiveField(2) final String sku; @HiveField(3) final String description; @HiveField(4) final double price; @HiveField(5) final double? salePrice; @HiveField(6) final List images; @HiveField(7) final String categoryId; @HiveField(8) final int stock; @HiveField(9) final bool isAvailable; @HiveField(10) final DateTime createdAt; } ``` #### Cart Item Model ```dart @HiveType(typeId: 2) class CartItemModel extends HiveObject { @HiveField(0) final String id; @HiveField(1) final String productId; @HiveField(2) final String productName; @HiveField(3) final double price; @HiveField(4) final int quantity; @HiveField(5) final String imageUrl; @HiveField(6) final DateTime addedAt; } ``` #### Order Model ```dart @HiveType(typeId: 3) class OrderModel extends HiveObject { @HiveField(0) final String id; @HiveField(1) final String orderNumber; @HiveField(2) final String customerId; @HiveField(3) final String customerName; @HiveField(4) final List items; @HiveField(5) final double subtotal; @HiveField(6) final double discount; @HiveField(7) final double shipping; @HiveField(8) final double total; @HiveField(9) final OrderStatus status; @HiveField(10) final String paymentMethod; @HiveField(11) final AddressModel deliveryAddress; @HiveField(12) final DateTime createdAt; @HiveField(13) final DateTime? completedAt; } ``` #### Project Model ```dart @HiveType(typeId: 4) class ProjectModel extends HiveObject { @HiveField(0) final String id; @HiveField(1) final String name; @HiveField(2) final String code; @HiveField(3) final String client; @HiveField(4) final String clientPhone; @HiveField(5) final String location; @HiveField(6) final DateTime startDate; @HiveField(7) final DateTime endDate; @HiveField(8) final int progress; // 0-100 @HiveField(9) final ProjectStatus status; // planning, inProgress, completed @HiveField(10) final double budget; @HiveField(11) final String description; @HiveField(12) final ProjectType type; // residential, commercial, industrial @HiveField(13) final DateTime createdAt; } ``` #### Loyalty Transaction Model ```dart @HiveType(typeId: 5) class LoyaltyTransactionModel extends HiveObject { @HiveField(0) final String id; @HiveField(1) final TransactionType type; // earn, redeem @HiveField(2) final int amount; @HiveField(3) final String description; @HiveField(4) final DateTime timestamp; @HiveField(5) final int newBalance; @HiveField(6) final String? orderId; @HiveField(7) final String? rewardId; } ``` --- ## Performance Optimization ### Image Caching ```dart // Use cached_network_image for all remote images CachedNetworkImage( imageUrl: product.images.first, placeholder: (context, url) => const ShimmerPlaceholder(), errorWidget: (context, url, error) => const Icon(Icons.error), fit: BoxFit.cover, memCacheWidth: 400, // Optimize memory usage fadeInDuration: const Duration(milliseconds: 300), ) ``` ### List Performance ```dart // Use ListView.builder with RepaintBoundary for long lists ListView.builder( itemCount: items.length, itemBuilder: (context, index) { return RepaintBoundary( child: ProductCard(product: items[index]), ); }, cacheExtent: 1000, // Pre-render items ) // Use AutomaticKeepAliveClientMixin for expensive widgets class ProductCard extends StatefulWidget { @override State createState() => _ProductCardState(); } class _ProductCardState extends State with AutomaticKeepAliveClientMixin { @override bool get wantKeepAlive => true; @override Widget build(BuildContext context) { super.build(context); return Card(...); } } ``` ### State Optimization ```dart // Use .select() to avoid unnecessary rebuilds final userName = ref.watch(authProvider.select((state) => state.user?.name)); // Use family modifiers for parameterized providers @riverpod Future product(ProductRef ref, String id) async { return await ref.read(productRepositoryProvider).getProduct(id); } // Keep providers outside build method final productsProvider = ...; class ProductsPage extends ConsumerWidget { @override Widget build(BuildContext context, WidgetRef ref) { final products = ref.watch(productsProvider); return ...; } } ``` --- ## Offline Strategy ### Data Sync Flow ```dart @riverpod class DataSync extends _$DataSync { @override Future build() async { // Listen to connectivity changes ref.listen(connectivityProvider, (previous, next) { if (next == ConnectivityStatus.connected) { syncData(); } }); return SyncStatus.idle; } Future syncData() async { state = const AsyncValue.loading(); state = await AsyncValue.guard(() async { // Sync in order of dependency await _syncUserData(); await _syncProducts(); await _syncOrders(); await _syncProjects(); await _syncLoyaltyData(); await ref.read(settingsRepositoryProvider).updateLastSyncTime(); return SyncStatus.success; }); } Future _syncUserData() async { final user = await ref.read(authRepositoryProvider).getCurrentUser(); await ref.read(authLocalDataSourceProvider).saveUser(user); } Future _syncProducts() async { final products = await ref.read(productRepositoryProvider).getAllProducts(); await ref.read(productLocalDataSourceProvider).saveProducts(products); } // ... other sync methods } ``` ### Offline Queue ```dart // Queue failed requests for retry when online class OfflineQueue { final HiveInterface hive; late Box _queueBox; Future init() async { _queueBox = await hive.openBox('offline_queue'); } Future addToQueue(ApiRequest request) async { await _queueBox.add({ 'endpoint': request.endpoint, 'method': request.method, 'body': request.body, 'timestamp': DateTime.now().toIso8601String(), }); } Future processQueue() async { final requests = _queueBox.values.toList(); for (var i = 0; i < requests.length; i++) { try { await _executeRequest(requests[i]); await _queueBox.deleteAt(i); } catch (e) { // Keep in queue for next retry } } } } ``` --- ## Error Handling ### Network Errors ```dart class ApiClient { Future request(String endpoint, {Map? data}) async { try { final response = await dio.post(endpoint, data: data); return _parseResponse(response); } on DioException catch (e) { if (e.type == DioExceptionType.connectionTimeout) { throw NetworkException('Connection timeout. Please check your internet.'); } else if (e.type == DioExceptionType.receiveTimeout) { throw NetworkException('Server took too long to respond.'); } else if (e.response?.statusCode == 401) { throw UnauthorizedException('Session expired. Please login again.'); } else if (e.response?.statusCode == 404) { throw NotFoundException('Resource not found.'); } else if (e.response?.statusCode == 500) { throw ServerException('Server error. Please try again later.'); } else { throw NetworkException('Network error: ${e.message}'); } } catch (e) { throw UnknownException('Unexpected error: $e'); } } } ``` ### Form Validation ```dart class Validators { static String? required(String? value) { if (value == null || value.trim().isEmpty) { return 'Trường này là bắt buộc'; } return null; } static String? vietnamesePhone(String? value) { if (value == null || value.isEmpty) { return 'Vui lòng nhập số điện thoại'; } final phoneRegex = RegExp(r'^(0|\+84)[3|5|7|8|9][0-9]{8}$'); if (!phoneRegex.hasMatch(value)) { return 'Số điện thoại không hợp lệ'; } return null; } static String? email(String? value) { if (value == null || value.isEmpty) { return 'Vui lòng nhập email'; } final emailRegex = RegExp(r'^[\w-\.]+@([\w-]+\.)+[\w-]{2,4}$'); if (!emailRegex.hasMatch(value)) { return 'Email không hợp lệ'; } return null; } static String? password(String? value) { if (value == null || value.isEmpty) { return 'Vui lòng nhập mật khẩu'; } if (value.length < 8) { return 'Mật khẩu phải có ít nhất 8 ký tự'; } if (!RegExp(r'[A-Z]').hasMatch(value)) { return 'Mật khẩu phải có ít nhất 1 chữ hoa'; } if (!RegExp(r'[a-z]').hasMatch(value)) { return 'Mật khẩu phải có ít nhất 1 chữ thường'; } if (!RegExp(r'[0-9]').hasMatch(value)) { return 'Mật khẩu phải có ít nhất 1 số'; } if (!RegExp(r'[!@#\$%^&*(),.?":{}|<>]').hasMatch(value)) { return 'Mật khẩu phải có ít nhất 1 ký tự đặc biệt'; } return null; } } ``` --- ## Testing Strategy ### Unit Tests ```dart void main() { group('CartNotifier', () { late CartNotifier cartNotifier; late MockCartRepository mockRepository; setUp(() { mockRepository = MockCartRepository(); cartNotifier = CartNotifier(mockRepository); }); test('addItem adds product to cart', () { final product = Product(id: '1', name: 'Test', price: 100); cartNotifier.addItem(product, 2); expect(cartNotifier.state.length, 1); expect(cartNotifier.state.first.quantity, 2); verify(mockRepository.saveCart(any)).called(1); }); test('cartTotal calculates correct total', () { final items = [ CartItem(id: '1', price: 100, quantity: 2), CartItem(id: '2', price: 50, quantity: 3), ]; final total = calculateCartTotal(items); expect(total, 350); // (100 * 2) + (50 * 3) }); }); } ``` --- ## Localization (Vietnamese Primary) ### Setup ```dart // l10n.yaml arb-dir: lib/l10n template-arb-file: app_en.arb output-localization-file: app_localizations.dart // lib/l10n/app_vi.arb (Vietnamese) { "@@locale": "vi", "appTitle": "Worker App", "login": "Đăng nhập", "phone": "Số điện thoại", "enterPhone": "Nhập số điện thoại", "continue": "Tiếp tục", "verifyOTP": "Xác thực OTP", "enterOTP": "Nhập mã OTP 6 số", "resendOTP": "Gửi lại mã", "home": "Trang chủ", "products": "Sản phẩm", "loyalty": "Hội viên", "account": "Tài khoản", "points": "Điểm", "cart": "Giỏ hàng", "checkout": "Thanh toán", "orders": "Đơn hàng", "projects": "Công trình", "quotes": "Báo giá", "myGifts": "Quà của tôi", "referral": "Giới thiệu bạn bè", "pointsHistory": "Lịch sử điểm" } // lib/l10n/app_en.arb (English) { "@@locale": "en", "appTitle": "Worker App", "login": "Login", "phone": "Phone Number", "enterPhone": "Enter phone number", "continue": "Continue", ... } ``` ### Usage ```dart class LoginPage extends ConsumerWidget { @override Widget build(BuildContext context, WidgetRef ref) { final l10n = AppLocalizations.of(context)!; return Scaffold( appBar: AppBar( title: Text(l10n.login), ), body: Column( children: [ TextField( decoration: InputDecoration( labelText: l10n.phone, hintText: l10n.enterPhone, ), ), ElevatedButton( onPressed: () {}, child: Text(l10n.continue), ), ], ), ); } } ``` --- ## Deployment ### Android ```gradle // android/app/build.gradle android { compileSdkVersion 34 defaultConfig { applicationId "com.eurotile.worker" minSdkVersion 21 targetSdkVersion 34 versionCode 1 versionName "1.0.0" } signingConfigs { release { storeFile file(RELEASE_STORE_FILE) storePassword RELEASE_STORE_PASSWORD keyAlias RELEASE_KEY_ALIAS keyPassword RELEASE_KEY_PASSWORD } } buildTypes { release { signingConfig signingConfigs.release minifyEnabled true shrinkResources true proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' } } } ``` ### iOS ```ruby # ios/Podfile platform :ios, '13.0' post_install do |installer| installer.pods_project.targets.each do |target| flutter_additional_ios_build_settings(target) target.build_configurations.each do |config| config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] = '13.0' end end end ``` --- ## Development Workflow ### Feature Development Process 1. **Review HTML Reference**: Check `html/` folder for design spec 2. **Design Data Layer**: Models, repositories, data sources 3. **Implement Domain Layer**: Entities, use cases 4. **Create Providers**: Riverpod state management 5. **Build UI**: Match HTML reference design 6. **Test**: Unit, widget, integration tests 7. **Optimize**: Performance profiling ### Code Review Checklist - [ ] Matches HTML reference design - [ ] Follows clean architecture - [ ] Proper error handling - [ ] Online-first approach - [ ] Performance optimized - [ ] Proper state management with Riverpod - [ ] Hive models properly defined - [ ] Vietnamese localization - [ ] Tests written and passing - [ ] Code documented --- ## Roadmap ### Phase 1 - Complete ✅ - Authentication (login, OTP, register) - Home with member cards (3 tiers) - Complete loyalty system - Product browsing and cart - Order management - Project and quote management - Chat support - Account management - Promotions and notifications ### Phase 2 - Backend Integration 🔄 - REST API integration - Real-time WebSocket for chat - Push notifications (FCM) - Payment gateway - Cloud image storage - Analytics tracking ### Phase 3 - Advanced Features 📋 - QR code scanner (loyalty & products) - Barcode scanning - Geolocation for nearby stores - Photo gallery for projects - PDF report generation - Biometric authentication - Offline mode with background sync - AR product visualization --- ## Remember: ALWAYS DELEGATE TO SPECIALISTS FOR BETTER RESULTS! When working on this Flutter Worker app: - **UI Tasks** → flutter-widget-expert - **State Management** → riverpod-expert - **Database/Caching** → hive-expert - **API Integration** → api-integration-expert - **Architecture Decisions** → architecture-expert - **Performance Issues** → performance-expert **Think delegation first, implementation second!**